CN1137427A - Pressing method and system - Google Patents
Pressing method and system Download PDFInfo
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- CN1137427A CN1137427A CN96100233A CN96100233A CN1137427A CN 1137427 A CN1137427 A CN 1137427A CN 96100233 A CN96100233 A CN 96100233A CN 96100233 A CN96100233 A CN 96100233A CN 1137427 A CN1137427 A CN 1137427A
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- 238000003825 pressing Methods 0.000 title claims abstract description 16
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- 238000012360 testing method Methods 0.000 claims description 42
- 239000012530 fluid Substances 0.000 claims description 28
- 230000000694 effects Effects 0.000 claims description 23
- 238000004080 punching Methods 0.000 claims description 23
- 238000013500 data storage Methods 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 13
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0094—Press load monitoring means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/02—Die-cushions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
- B21D24/14—Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Control Of Presses (AREA)
Abstract
Pressing method and system wherein a drawing operation on a blank is performed by a die and a punch during a movement of the die with a pressure ring relative to the punch against a movement resistance applied to a cushion platen, such that the blank is held by and between the pressure ring and the die, with a blank holding force which is generated based on the movement resistance of the cushion platen and is transmitted to the pressure ring through cushion pins interposed between the cushion platen and the pressure ring, and wherein a load which is transmitted to the pressure ring through each cushion pin during the drawing operation is detected, and a determination is made as to whether the blank is adequately held by the blank holding force, depending upon whether a predetermined characteristic value or values of the detected load transmitted satisfies a predetermined condition .
Description
Background of the present invention
The present invention relates to the field
The present invention relates to realize the process for stamping and the system of blank stamping process, this method and system has guaranteed the high-precision diagnosis to the reasonable pressure holding of blank: the invention still further relates to a kind of device, this device is applicable to above-mentioned method and system, is used for the load that is delivered on the blank via cushion pins is detected.
Correlation technique is discussed
A kind of widely used stamping system comprises: (a) punch die and a drift, realize the stamping process of blank together, with the profiled surface drawing of blank along drift, (b) buffer board, (c) drag effect device, be used for the motion of buffer board is applied resistance, (d) pressure ring, in punching press towards the shape process, this pressure ring is pushed down blank with punch die along the blank periphery, (e) a plurality of cushion pins, be placed in parallel to each other within buffer board and the pressure ring, be used for being delivered on the pressure ring based on the blank press force of above-mentioned resistance, when moving when pressure ring and punch die are overcoming the pressing direction of above-mentioned resistance with respect to drift on, stamping process is just realized.In stamping process, buffer board descends and overcomes by the drag effect device and is applied to the resistance of pressing on the punching.The slow level that is in substantially of buffering, drift are fixed on the platen and platen is positioned at the buffer board top.The lower end of cushion pins is supported by buffer board, and cushion pins passes each through hole on the platen and each through hole on the drift respectively.The last end bearing of cushion pins pressure ring.Be in drift and the punch die above the pressure ring moves reciprocatingly in vertical direction by appropriate driving device, like this, punch die and pressure ring move with respect to drift, thereby realize the stamping process of blank.
Also have a kind of stamping system that is widely known by the people also further to comprise: (f) a plurality of fluid driven equilibrium cylinders that are placed on the buffering punching, like this, the lower end of cushion pins links to each other with the piston of each fluid driven equilibrium cylinder.Fluid driven equilibrium cylinder is made up of the hydraulic cylinder that has pressure chamber separately and be interconnected, and in stamping process, blank by pressure holding within pressure ring and punch die, the piston of these hydraulic cylinders all is on its middle position, and the blank press force balancedly acts on the pressure ring by all cushion pins as a result.In patent JP-A-6-304800 (announcing in 1994), disclosed an example of this type stamping system.In this stamping system, the blank press force by the fluid in the hydraulic cylinder and cushion pins proportionality action on pressure ring and blank, to set up the blank press force of required distribution, this depends on the arrangement mode of cushion pins and irrelevant with the size of cushion pins and site error or deviation, and these errors or deviation have such as the length variation of cushion pins and buffer board with respect to the inclination of level board etc.
Consider that the blank press force is an equiblibrium mass distribution on the whole surface of pressure ring, in the stamping process of blank, the piston of all hydraulic cylinder all should remain on it up and down within the stroke, between promptly being positioned at wherein on the position, and irrelevant with the length variation of cushion pins and other size and site error.For this reason, before stamping process, should determine best initial hydraulic pressure P so in the hydraulic cylinder earlier, make it satisfy following formula (1):
Xav=(Fs-nAsPso) V/n
2As
2K ... (1) wherein,
The average impulse stroke of Xav-hydraulic cylinder piston (from the stroke upper end)
The compression area of As-hydraulic cylinder
The elastic modelling quantity of K-fluid
The original volume of V-working fluid
Fs-blank end finger power
The quantity of n-cushion pins 22 (or corresponding hydraulic cylinder) |
The average impulse stroke Xav of balance hydraulic cylinder piston is these pistons from the mean values of the impulse stroke of its stroke upper end beginning, in the stroke upper end of piston, all cushion pins all with the bottom surface of pressure ring termination mutually.Average impulse stroke Xav can be by experiment or other method determined, the result, even exist size and site error, as the length variation of cushion pins and the inclination of buffer board etc., the piston of all hydraulic cylinder is all pushed away its stroke upper end downwards by separately cushion pins, but still leaves its stroke lower end (not put and the bottom).Volume V is the total measurement (volume) amount of working fluid in the hydraulic circuit (pressure chamber and the conduit that is connected pressure chamber that comprise hydraulic cylinder).
JP-A-6-312225 (announcing in 1994) has proposed a kind of diagnostic device about stamping system, this device is adapted to whether stamping system diagnosed to be in check blank press force the blank press force is kept in balance in stamping process in the optimum range that distributes, at this moment the equal position in the middle of it, position of the piston of all balance hydraulic cylinders.This diagnosis is to realize according to the correlation within the hydraulic pressure that is produced in blank press force and the stamping process, in other words, the diagnostic device of above-mentioned Patent publish is applicable to that hydraulic pressure that check produced in the stamping process is whether consistent with the predetermined optimum value that the blank press force is kept in balance distribute substantially.
Therefore, if the piston of all balance fluid driven cylinders all is on its middle position, known diagnostic device can be used to determine that the blank press force is an equiblibrium mass distribution.Yet, the piston of compensating cylinder mediates and might not mean that the blank press force is evenly distributed on pressure ring and the blank substantially through cushion pins, and, known diagnostic device can not guarantee that diagnosis consistently is high-precision, does not also allow the load that is delivered on the pressure ring via each cushion pins is carried out very complicated or refined control.The method that the hydraulic pressure that utilization produces reality is compared with predetermined optimum value is diagnosed the equiblibrium mass distribution of blank press force, in this case, can not detect the fault (promptly in stamping process, being in its piston position) that the unbalanced distribution of blank press force has taken place to cause which hydraulic cylinder.Its result, find out and get rid of the reason that causes unbalanced distribution be very trouble.
Although can run into the problems referred to above in the stamping system that is equipped with fluid driven equilibrium cylinder, the stamping system that is not equipped with such fluid driven equilibrium cylinder does not more have suitable method that the system of the reasonable pressure holding of blank in stamping process is diagnosed.In this case, the user of stamping system must test to the product quality of actual production in the blank stamping process, with determine blank whether by pressure ring reasonably pressure holding.
The present invention's brief description
Therefore purpose of the present invention is exactly can realize blank is carried out high-precision diagnosis by the stamping system of pressure holding rationally, perhaps realize very complicated, refined control are carried out in the distribution of blank press force, perhaps simplify and quicken diagnosis, adjusting or trimming process to find out and to eliminate the reason of the unreasonable pressure holding that causes blank.
Can realize above-mentioned purpose according to first of the present invention, this part has proposed a kind of method of punching press blank in the stamping system, stamping system comprises: (a) punch die and a drift, they realize the stamping process of blank together, blank is drawn along the profiled surface of drift to be dialled, (b) buffer board, (c) drag effect device, be used for the motion of buffer board is applied resistance, (d) pressure ring, in stamping process, push down blank with punch die along the blank periphery, (e) a plurality of cushion pins, be placed in parallel to each other within buffer board and the pressure ring, be used for the blank press force based on resistance is delivered on the pressure ring, thereby when moving when pressure ring and punch die are overcoming the pressing direction of above-mentioned resistance with respect to drift on, stamping process is just realized that this method may further comprise the steps: detect in the stamping process via each cushion pins and be delivered to load on the pressure ring; Determine blank whether by the blank press force reasonably pressure holding, just to determine whether satisfy predetermined condition via at least one predetermined characteristic value of the detected load of each cushion pins transmission.
In this process for stamping, the load that is delivered on the pressure ring via each cushion pins is detected, and definite blank whether by the blank press force reasonably pressure holding, whether this predetermined characteristic value that depends on detected load on each cushion pins satisfies predetermined condition.Being delivered to load on the pressure ring via each cushion pins has directly represented via cushion pins and has been delivered to local blank press force on the pressure ring.Therefore, according to this process for stamping, to stamping system (may or not being furnished with fluid driven equilibrium cylinder) can carry out high-precision diagnosis with determine blank whether by the press force pressure holding of required distribution at pressure ring and punch die in this, and when the predetermined characteristic value of the detected load of each cushion pins satisfies predetermined condition, just can set up the blank press force of required distribution.In addition, utilize the detected load of transmitting via cushion pins the distribution of blank press force on pressure ring (and blank) to carry out ten minutes refined control or adjusting.The cushion pins that the characteristic value of those detected load does not satisfy condition can also easily be discerned or judge to this process for stamping, thus to this stamping system can be easily, test, regulate or keep in repair the reason that causes the unreasonable distribution of blank press force to find out and to eliminate expeditiously.Not only make the stamping system of being furnished with fluid driven equilibrium cylinder according to this a part of process for stamping of the present invention, and make the stamping system of not being furnished with compensating cylinder all have above-mentioned these advantages.
This method is used at least one predetermined characteristic value of detected load on each cushion pins, this characteristic value can be selected from the damped coefficient of waveform, peak value, mean value, frequency of oscillation and the waveform of load, and load is to obtain along a motion detection of pressing direction each other by punch die and drift in stamping process.In a preferred form of the present invention, if characteristic value remains in the allowable deviation scope or the difference or the deviation of the characteristic value of cushion pins remain in the allowable deviation scope, each characteristic value of detected load all satisfies predetermined condition.These allowable deviation scopes are to determine that by the best features value via the load of cushion pins transmission these best features values are drawn together the optimal damping coefficient of the optimum waveform such as load, best peak value, optimal average, best frequency of oscillation or load.The determining of these optimum waveforms and numerical value depends on needed blank press force and can make blank be drawn into the product of required quality.Like this, the allowable deviation scope of the deviation of feature pin load value all can be as predetermined condition on the allowable deviation scope of the selected characteristic value of cushion pins load or all cushion pins.In the previous case, same allowable deviation scope can be used for all cushion pins, or different allowable deviation scopes is used for different cushion pins.
Also can realize above-mentioned purpose according to second portion of the present invention, this part has proposed a kind of method of punching press blank in the stamping system, stamping system comprises: (a) punch die and a drift, they realize the stamping process of blank together, make the profiled surface drawing of blank along drift, (b) buffer board, (c) a plurality of fluid driven equilibrium cylinders, be placed on the buffer board and have the pressure chamber that is interconnected, (d) drag effect device, be used for the motion of buffer board is applied resistance, (e) pressure ring, in stamping process, push down blank with punch die along the blank periphery, (f) a plurality of cushion pins, be placed in parallel to each other within pressure ring and the compensating cylinder, be used for the blank press force based on resistance is delivered on the pressure ring, thereby when when pressure ring and punch die are overcoming the pressing direction of resistance with respect to drift on, moving, stamping process is just realized that this method may further comprise the steps: detect in the stamping process via each cushion pins and be delivered to load on the pressure ring; If at least one predetermined characteristic value via the detected load of each cushion pins transmission satisfies predetermined condition, determine that the blank press force is evenly distributed on the pressure ring via cushion pins.
This process for stamping according to second portion of the present invention is applicable to the stamping system that is equipped with the fluid driven equilibrium cylinder that is placed within buffer board and the cushion pins.In this process for stamping, judge whether the blank press force is evenly distributed on the pressure ring via cushion pins.This method have with according to the identical substantially advantage of the method for first of the present invention.
In a preferred form according to second portion of the present invention, the predetermined characteristic value of detected load comprises the frequency of oscillation of predetermined load value or detected load waveform.In this case, if for all cushion pins, predetermined load value or frequency of oscillation remain in the predetermined allowable deviation scope, so just judge that the blank press force is evenly distributed on the pressure ring via cushion pins, the piston of all compensating cylinders all is on the centre position between its stroke upper and lower side simultaneously.
In one of the above-mentioned preferred form of the present invention useful structure, process for stamping further may further comprise the steps: if at least one cushion pins, predetermined load value or frequency of oscillation are greater than the higher limit of predetermined allowable deviation scope, so just judge in stamping process, have at least the piston of a balance to move to its stroke lower end; If at least one cushion pins, predetermined load value or frequency of oscillation so just judge in stamping process to have at least the piston of a compensating cylinder to remain on its stroke upper end less than the lower limit of predetermined allowable deviation scope.
If in stamping process, the piston of a certain fluid driven equilibrium cylinder is in the bottom or moves to its stroke lower end, so via the load of the corresponding cushion pins transmission analog value certainly will be greater than the centre position that is in when piston between the stroke upper and lower side time.Otherwise if in stamping process, the piston of a certain fluid driven equilibrium cylinder remains on stroke upper end, so quite the load on the cushion pins certainly will be when being in its position, centre when piston analog value.In addition, if when the piston of a certain compensating cylinder moves downward its stroke lower end, the analog value (the pressure oscillation frequency that also is higher than fluid in the compensating cylinder) the when frequency of oscillation of corresponding cushion pins load certainly will be higher than in the middle of piston is in it position.If piston remains on its stroke upper end, the analog value when frequency of oscillation certainly will be lower than in the middle of piston is in it position, this is because almost nil or the quite little and cushion pins load not vibration basically of load of transmitting via cushion pins.
In view of this fact, if the feature load value of detected load or frequency of oscillation remain in the predetermined allowable deviation scope on all cushion pins, so just can judge that the blank press force is via cushion pins equiblibrium mass distribution (piston of all compensating cylinders all is in its middle position simultaneously).If the feature load value of the detected load of any cushion pins or frequency of oscillation, so just can judge that the piston of corresponding compensating cylinder has moved to the stroke lower end greater than the upper limit of allowable deviation scope.If the feature load value of the detected load of any cushion pins or frequency of oscillation, so just can be judged the piston of corresponding compensating cylinder less than the lower limit of allowable deviation scope and remain on its stroke upper end.Under back two kinds of situations, can regulate so that the piston of all compensating cylinders all mediates in stamping process the fluid pressure in the compensating cylinder, as a result, the blank press force can be evenly distributed on the pressure ring via all compensating cylinders and all cushion pins.When the piston of compensating cylinder moved to its stroke lower end, fluid pressure rose, and when piston was in its stroke lower end, fluid pressure descended.
Another best mode according to second aspect present invention, above-mentioned at least one predetermined characteristic value comprises the peak value of detected load waveform at least, in mean value and the frequency of oscillation one, this detected load is to obtain along once moving of pressing direction each other by punch die and drift in stamping process.
In the above-mentioned preferred form of this process for stamping, need to determine whether the blank press force is evenly distributed on the pressure ring via cushion pins, this depends on the peak value of the detected load of transmitting via cushion pins, and whether mean value or frequency of oscillation remain in the predetermined allowable deviation scope.Its result, this method not only can be set up the blank press force of equiblibrium mass distribution effectively, and can realize making the load value of each cushion pins load or frequency of oscillation to remain on the interior stamping process of range of allowable error, thereby can uniform high-quality stamped product.
The frequency of oscillation of detected cushion pins load is the inverse of the cycle of oscillation of detected load waveform.Therefore, can replace cycle of oscillation frequency of oscillation to determine piston and whether be in the middle of it position or to move to the stroke lower end or remain on the stroke upper end.The advantage of practical cycle of oscillation and practical frequency of oscillation is identical substantially.
A more preferred form according to second portion of the present invention, above-mentioned at least one comprise in peak value, mean value and the frequency of oscillation of detected load waveform one at least via the predetermined characteristic value of the detected load of each cushion pins transmission, this detected load value is by obtaining along once moving of pressing direction between punch die and drift in stamping process.
The peak value of detected cushion pins load, mean value and frequency of oscillation can obtain at an easy rate according to the waveform of detected load, also can be distinguished with numerical value.Compared with direct use pin load waveform, use numerical characteristic value can be easier, more accurately the stamping system of reasonable pressure holding of blank or blank press force equiblibrium mass distribution is diagnosed, and use pin load waveform to need the bigger memory of Capacity Ratio to store representative pin load waveform data.
Also can realize above-mentioned purpose according to third part of the present invention, this part has proposed a kind of stamping system, it comprises: (a) punch die and a drift, they realize the stamping process of blank together, make the profiled surface drawing of blank along drift, (b) buffer board, (c) drag effect device, be used for the motion of buffer board is applied resistance, (d) pressure ring, in stamping process, push down blank with punch die along the blank periphery, (e) a plurality of cushion pins are placed between buffer board and the pressure ring in parallel to each other, are used for the blank press force based on resistance is delivered on the pressure ring, thereby when pressure ring and punch die are overcoming on the pressing direction of resistance when moving with respect to drift, stamping process is just realized.This stamping system comprises: load detecting device is used for detecting via the load value that each cushion pins is delivered on the pressure ring at stamping process; The reference data storage device is used to store the data of representing predetermined condition, and if blank by the blank press force reasonably pressure holding, at least one predetermined characteristic value via the detected load of each cushion pins transmission satisfies this predetermined condition so; Diagnostic device, be used for determining blank whether by the blank press force reasonably pressure holding, whether this at least one predetermined characteristic value that depends on detected load satisfies predetermined condition.
According to this stamping system of third part of the present invention structure the implementation according to the process for stamping of first of the present invention also is suitable for.In order to carry out this process for stamping, load detecting device is used for the load that is delivered on the pressure ring via each cushion pins is detected.Diagnostic device be used for determining blank whether by the blank press force reasonably pressure holding, whether this at least one characteristic value that depends on detected load satisfies predetermined condition, the data of predetermined condition are stored in the reference data storage device.Compare with the process for stamping according to first of the present invention, this stamping system has identical substantially advantage.
Also can realize above-mentioned purpose according to the 4th part of the present invention, a kind of load detecting device that the stamping system that this part has proposed and above-mentioned third part is constructed according to the present invention uses together, be used for the load that is delivered on the pressure ring via each cushion pins is detected, in this case, buffer board keeps level substantially when overcoming resistance and moving downward; Drift is packed on the platen that is positioned at the buffer board top; A plurality of cushion pins pass the through hole on platen and the drift, and pressure ring is being supported in the top by the buffer board supporting in the cushion pins lower end like this; This load detecting device comprises: the load that is placed between platen and drift detects piece, detects and has the through hole that passes for cushion pins on the piece; Sell with the load sensitivity that the cushion pins upper end is connected in series mutually respectively, the length of the responsive pin of load equates with the height dimension of load detection piece substantially, on the responsive pin of each load a load transducer is housed all, is used for detection effect load, this used load is delivered on the pressure ring via each cushion pins.
This load detecting device according to the present invention's the 4th section construction is applicable to that realization according to the process for stamping that first of the present invention proposes, more precisely, is applicable to that the load to being delivered on the pressure ring via each cushion pins detects.In this load detecting device, load detects that piece is placed between platen and the drift and the load sensitivity sells respectively that the upper end of cushion pins is connected in series mutually.The length of the responsive pin of each load equals the height dimension that load detects piece substantially.On the responsive pin of each load a load transducer is housed all, is used for detecting the load that acts on this sensitivity pin in stamping process, this load is delivered on the pressure ring via cushion pins.Load detecting device can be installed on the stamping system at an easy rate together with die set.In other words, when adopting a new die set to realize stamping process, load detects piece and is installed on the platen, and the cushion pins that the responsive pin of load is housed is worn the through hole on platen and the drift.Therefore, this load detecting device can be installed on the common stamping machine at an easy rate, and at this moment, load detects piece and is placed on the platen, and the common cushion pins of cushion pins replacement of the responsive pin of load is housed.Therefore, this load detecting device can be easily, be economically installed in common stamping machine, and must not make very big structural modification to stamping machine.
Brief Description Of Drawings
With reference to accompanying drawing and read the following detailed description of a preferred embodiment of the present invention, the target of the present invention, feature, advantage and the technical and industrial importance that are proposed above can understanding better.In the accompanying drawing:
Fig. 1 is afraid of the schematic diagram of the stamping system of structure according to one embodiment of the present of invention for expression;
Fig. 2 is the block diagram of control structure in the expression stamping system shown in Figure 1;
Fig. 3 is the display screen in the expression control structure shown in Figure 2 and the schematic diagram of control panel;
Fig. 4 is for acting on the schematic diagram of load waveform on the cushion pins in the explanation stamping system shown in Figure 1;
Fig. 5 is the schematic diagram of each functional block of expression stamping system middle controller shown in Figure 1, these functional blocks are passed through the inline diagnosis to the equiblibrium mass distribution state of blank press force in the blank drawing process, thereby the pressure in the balance hydraulic cylinder is regulated, so that the blank press force is evenly distributed on the pressure ring in the stamping system shown in Figure 1.
The diagnosis that Fig. 6 finishes for functional block in the presentation graphs 5 and the flow chart of hydraulic regulation process;
Fig. 7 is the schematic diagram of each functional block of expression stamping system middle controller, and these functional blocks are used for finishing diagnostic procedure to find out the optimum range of initial blank press force, and in this scope, the blank press force is an equiblibrium mass distribution.
Fig. 8 is the flow chart of the diagnostic procedure that functional block is finished in the presentation graphs 7.
DETAILED DESCRIPTION OF THE PREFERRED
At first with reference to Fig. 1, represented a kind of stamping machine among the figure, it comprises: pedestal 16, be installed in the stamped bracket 14 on the pedestal 16, and be placed on the platen 12 on the stamped bracket 14, and platen 12 is in level substantially.Drift 10 is installed on the platen 12, and punch die 18 is installed on the slide plate 20, and slide plate 20 is driven by corresponding driving mechanism, can be reciprocating in vertical direction.Many through holes that are arranged in box formation 24 that run through its thickness are arranged on the platen 12, and cushion pins 22 passes through hole 24 respectively and extends out.Below platen 12, be buffer board 26, be used to support cushion pins 22, so buffer board 26 is in level substantially.End bearing the pressure ring 28 that is connected with drift 10 on the cushion pins.The size and the shape of rationally determining to depend on pressure ring 28 of the position of cushion pins and quantity.Drift 10 comprises body portion, has a plurality of on the matrix and cushion pins 22 corresponding through holes, and the through hole 24 on these through holes and the platen 12 runs through mutually.Cushion pins 22 equally also passes these through holes on the drift 10.Be equipped with a plurality of on the buffer board 26 and through hole 24 corresponding balance hydraulic cylinders 30.Hydraulic cylinder 30 has piston and piston rod separately.The lower surface of cushion pins 22 terminates on the upper surface of piston rod in the hydraulic cylinder 30.Hydraulic cylinder 30 plays a part fluid driven equilibrium cylinder makes the blank press force be evenly distributed on the pressure ring 28 via cushion pins 22.
Buffer board 22 is placed on stamped bracket 14 the insides (as mentioned above), can move in vertical direction, provides active force upwards by bounce cylinder 32 such drag effect devices.The pressure chamber of cylinder 32 links to each other with air tank 34, and compressed air source 36 provides compressed air by Pneumatic pressure control circuit 38 to air tank 34.A shutoff valve 37 and a pneumatic pressure transmitter 39 in addition of linking to each other with air tank 34.Pneumatic pressure Pa in air tank 34 and the cylinder 32 is regulated by Pneumatic pressure control circuit 38 and shutoff valve 37, and this pressure Pa depends on the desirable value of the blank press force that acts on the pressure ring 28, to describing in detail below this.When punch die 18 moved downward along with slide plate 20, the periphery of blank 40 was pressed between punch die 18 and the pressure ring 28 by the blank press force, and the blank press force also is that cylinder 32 interior Pneumatic pressure Pa are provided by the upwards active force of bounce cylinder 32.When punch die 18 and pressure ring 28 further descended and overcome the upwards active force of cylinder 32, punch die 18 and drift 10 were finished the stamping process to blank 40 together, make the profiled surface drawing of blank 40 along drift 10.The upwards active force of bounce cylinder 32 has applied a resistance to moving downward of buffer board 26, has produced the blank press force thus.
Balance hydraulic cylinder 30 has pressure chamber separately, and these pressure chambers are by conduit 46 interconnection, and conduit 46 links to each other with conduit 50 via flexible pipe 48, and conduit 50 is connected on the air-driven hydraulic pump 52, and hydraulic pump 52 is used for the work oil that pumps in fuel tank is carried out supercharging.As a result, the pressurised oil that is transmitted by pump 52 infeeds the pressure chamber of hydraulic cylinder 30 by the check valve on the conduit 50 56, and hydraulic pressure control circuit 58 comprises a pressure-relief valve and is connected with conduit 50.Hydraulic pump 52 and hydraulic pressure control circuit 58 are controlled, thereby make the hydraulic pressure Ps in conduit 50 and the hydraulic cylinder 30 adjusted, like this, in stamping process to blank 40, the piston that all and cushion pins 22 join on the hydraulic cylinder 30 all is in the middle of it on position, that is to say, to hydraulic pressure Ps regulated make the blank press force that produced based on Pneumatic pressure Pa by cushion pins 22 proportionality action on pressure ring 28 (with blank 40), the hydraulic pressure sensor 60 that links to each other with conduit 46 is used for detecting hydraulic pressure Ps.
In this stamping system, a load detecting device 100 is arranged, it is used for detection effect and is delivered to load Fp on the pressure ring 28 on each cushion pins 22 or by cushion pins.The load Fp here is meant " pin load Fp ".Load detecting device 100 comprises: be fixed on the responsive pin 104 of load that the load on the above-mentioned platen 12 detects piece 102 and is connected in series mutually with cushion pins 22.Drift 10 is placed on load and detects on the piece 102.As platen 12, load detects also has many and through hole 24 to be positioned at through hole 106 on the same center line on the piece 102, equally also be arranged in and through hole 24 corresponding box formations.Cushion pins 22 is installed is made it pass corresponding through hole 24 and through hole 106, the requirement of cushion pins depends on the size and the shape of drift 10 and pressure ring 28, and drift 10, pressure ring 28 and punch die 18 have constituted a die set together.Stamping machine with platen 12 and load detection piece 102 can be furnished with different types of die set, the product form of being manufactured by stamping machine is depended in the selection of die set, cushion pins 22 passes corresponding through hole 24,106, and the position is determined by employed special complete mould.In the present embodiment, through hole 106 is corresponding with through hole 24, and 106 of each through holes allow a cushion pins 22 to pass, yet load detects each through hole on the piece 102 and but allows two or more cushion pins 22 to pass.
Each load test pin 104 all is fixed on the upper part of corresponding cushion pins 22 by suitable fixing means (fixing as screw thread).On all cushion pins 22 of stamping machine test pin 104 is housed all, and each load transducer 108 of shape such as foil gauge is housed on the test pin 104.The length of load test pin 104 equals height or the thickness that load detects piece substantially, the result, and before load detecting device 100 is installed on stamping machine and afterwards, the corresponding height of drift 10 and pressure ring 28 remains unchanged.Therefore, be installed in load detecting device 100 on the stamping machine and do not influence drawing process blank 40.The responsive pin 104 of each load all has corresponding identifier, and when utilizing the load value Fp of corresponding load transducer 108 test pins, these identifiers are very useful.These identifiers can also be used to discern corresponding load transducer 108 and responsive 104 the cushion pins 22 of selling of load is housed simultaneously.
Hydraulic pressure Ps and Pneumatic pressure Pa are controlled by control module shown in Figure 2 62.Control module 62 is applicable to that the amplifier by separately receives the output signal from pneumatic pressure transmitter 39, hydraulic pressure sensor 60 and load transducer 108.Control module 62 comprises: be furnished with the microprocessor of central processing unit (CPU), random access memory (RAM) and read-only storage (ROM).Microprocessor is finished signal processing to regulate Pneumatic pressure Pa and hydraulic pressure Ps, enforcement diagnosis or inline diagnosis and to regulate to set up the blank chucking power of equiblibrium mass distribution according to the control program that is stored among the ROM, will be illustrated this below.For control module 62, also be furnished with display screen and guidance panel 68, " test punching press " switch 67 and a sliding position sensor 69." test punching press " switch 67 is installed on the correct position of stamping machine, and when the stamping machine operating personnel connected switch 67, " test punching press " switch 67 sent " test punching press " signal SS.Slider position sensor 69 is used for detecting the position of slide plate 20 and produces " sledge displacement " signal SD of expression slide plate 20 in drawing circulation present position.Control module 62 receives " test punching press " signal SS and " stroke " signal SD.Many operating personnel's gauge taps and indicator are arranged on display screen and the control panel 68, be used for showing hydraulic pressure and Pneumatic pressure value Ps, Pa etc. as indicator 70 and 71.
Storing the machine information of representing the stamping machine specification among the RAM of control module 62, such as weight W a, the average weight Wp of cushion pins 22, the compression area Aa of bounce cylinder 32 and the compression area As of each balance hydraulic cylinder 30 etc. of buffer board 26.On the other hand, be installed in the ID card (as shown in Figure 1) on the drift 10 and be stored as mold information, such as the quantity un of the cushion pins 22 of the weight of pressure ring 28, installation ", the optimum value Fpmaxo of best blank press force Fso, pin load Fp peak-peak Fpmax, the optimum value Fpavo of pin load Fp mean value and the best frequency of oscillation Wo of pin load Fp waveform etc.Best blank press force Fso is the optimum value of blank press force Fs, and it has guaranteed that blank 40 satisfies desired product workmanship in stamping process.Control module 62 utilizes receiver 64 shown in Figure 2 to receive from the die set information on the ID card 66.A data memory is arranged on the ID card, be used to be stored as mold information.One of effect of ID card is that response is from the useful signal of receiver 64 and utilize receiver 64 that die set information is sent to control module 62; Two of its effect be response equally from the useful signal of receiver 64 to refresh die set information.
Shown in the curve map of Fig. 4, because the oscillation action of hydraulic pressure Ps in the balance hydraulic cylinder 30, pin load Fp produces vibration or vibration.The peak-peak Fp-max of pin load Fp is the peak-peak in each peak value of load Fp waveform, and shown in curve among Fig. 4, wherein peak-peak Fpmax occurs on the ST1 position of slide plate 20.Among the figure, ST2 represents the stroke lower end of slide block 20.To be pin load Fp move downward in the process mean value on the time period between the in-position ST1 and position ST2 at slide plate 20 to pin load mean value Fpav.Frequency of oscillation W be pin load Fp cycle of oscillation T inverse.When blank carries out quality that the product of drawing manufacturing meets the demands at that time, promptly between placing wherein, piston that all and the cushion pins 22 installed on the balance hydraulic cylinder 30 join during the position, just obtains best blank press force Fso, pin load optimal average Fpavo and best frequency of oscillation W in the stamping process of blank 40.Pin load mean value Fpav can be the mean value of all minimum and maximum values in the time period corresponding to slide position ST1 and ST2.But, pin load mean value Fpav is preferably by obtaining pin load Fp integration.Frequency of oscillation W remains constant basically in the whole impulse stroke of slide block 20, and can obtain according to the time interval within the adjacent maxima of pin load Fp (T cycle of oscillation).Peak-peak Fpmax, the variation of pin load mean value Fpav and frequency of oscillation W depends on whether the piston that joins with the cushion pins of installing 22 in the balance hydraulic cylinder 30 is on its middle position, if piston is in its stroke upper end, it is little then to be worth Fpmax, Fpav and the W analog value when being on the centre position than piston.If when piston was in the bottom or moves downward the lower end of its stroke, the analog value when value Fpmax, Fpav and W are on the centre position than piston was big.
Concerning each special-purpose stamping machine, the best peak-peak Fpmaxo of each die set pin load Fp, optimal average Fpavo and best frequency of oscillation Wo all are predefined.But, because value Fpavo is not subjected to the influence of the machine specifications vary of stamping machine, to different stamping machines, optimal average Fpavo can be identical.Taked certain measure in the present embodiment, the load value Fp characteristic that allows the piston on all hydraulic cylinder 30 to be on its middle position and each cushion pins 22 does not have bigger variation and difference.Therefore, can use identical a class value Fpmaxo, Fpavo and Wo for all cushion pins 22.But, for dissimilar cushion pins 22, different class value Fp-maxo, Fpavo and Wo are set.For example, can transform stamping machine like this, make the part piston of hydraulic cylinder 30 be in the bottom so that in keeping buffer board 26 and pressure ring 28, in the reasonable distance, set up the minimum range of 28 of buffer board 26 and pressure rings, as a result, the piston of other hydraulic cylinder 30 is on the centre position.In this case, need be each cushion pins 22 setting value Fpmaxo, Fpavo and Wo corresponding to bottom piston in the hydraulic cylinder 30.If stamping machine does not dispose hydraulic cylinder 30,, need be each cushion pins 22 setting value Fpmax-o, Fpavo and Wo so because dissimilar cushion pins 22 have bigger difference on load value Fp characteristic.
To the inline diagnosis of implementing under control module 62 controls be described below.The optimum value of Pneumatic pressure Pa can be calculated to determine best blank press force Fso by following formula (2) in the bounce cylinder 32:
Pa＝(Fso+Wa+n·Wp+Wr)/Aa……………(2)
Pneumatic pressure Pa is regulated by handling Pneumatic pressure control circuit 38 and shutoff valve 37.Just as explained above, weight W a, Wp and compression area Aa are stored among the ROM of control module 62 as the part of machine information, and weight W r, numerical value n and best blank press force Fso send into control module 62 as the part of die set information from ID card 66.The initial value Pso of hydraulic pressure Pso can according to above-mentioned formula (1) or by experiment stamping process determined, and can set up by Hydraulic pump 52 and hydraulic pressure control circuit 58 are controlled.As a result, all pistons that join with the cushion pins of installing 22 all are in position in the middle of it on the hydraulic cylinder 20, thereby by cushion pins 22 blank press force Fs are evenly distributed on the pressure ring 28.On the other hand, the similar implementation method of utilization and following inline diagnosis can be set up hydraulic pressure initial value Pso.
Functional block diagram among Fig. 5 has represented to be used in the control module 62 finish each functional block of inline diagnosis and hydraulic pressure adjustment process (referring to flow chart shown in Figure 6).In this diagnostic procedure, step S1-S3 finishes by the DSB data store block 114 of control module 62, flow process is from step S1, and this step determines at first whether the position by the slide plate 20 of " sliding position " signal SD representative is in the stroke upper end of slide plate 20.If step S1 is judged to be "Yes" (Yes), promptly when " sliding position " signal SD shows that slide plate 20 is in the upper end of its stroke, control flow just turns to step S2 reading the output signal of all load transducers 108 of load value Fp on the corresponding cushion pins 22 of representative, and slide plate 20 beginning end motions under its stroke at this moment.Be stored in 116 li of the data storages of control module 62 by the load value Fp of the output signal representative of load transducer 108, this load value Fp is relevant with the position of slide block 20 in its impulse stroke.The analog output signal of load transducer 108 converts data signal to by A/D converter 112, and this data signal is received by stored digital piece 114 and deposits data storage 116 in by DSB data store block 114.Step S3 is right after after step S2 to determine whether slide plate 20 arrives its stroke lower end.Repeating step S2 and step S3 are till step S3 is judged to be acknowledge signal "Yes" (Yes).Like this, slide plate 20 thereon, the load value Fp in the down stroke on the diverse location is detected and be stored in 116 li of data storages.Certainly, step S1-S2 is used to detect the load value Fp that transmits by each cushion pins 22, and DSB data store block 114 and load detecting device 100 have constituted jointly together and be used for load detecting device that the load value Fp on the cushion pins 22 is detected.Sliding position sensor 74 is suitable at least the stroke upper and lower end of slide plate 20 is detected.Sliding position sensor 74 can be used as an absolute rotary encoder, is used for detecting the angle position that makes the driving mechanism bent axle that slide plate 20 moves reciprocatingly.
When step S3 is judged to be acknowledge signal "Yes" (Yes), control flow turns to step S4, in this step, feature calculation piece in the control module 62 shown in Figure 5 118 according to the load value Fp that is stored in 116 li of data storages to the characteristic value of load value Fp on all cushion pins 22, promptly peak-peak Fpmax, mean value Fpav and the frequency of oscillation W to load Fp on each cushion pins 22 calculates.After the step S4 is step S5-S8, they are carried out by the diagnostics block in the control module 62 shown in Figure 5 120, be used for determining whether blank press force Fs is evenly distributed on the pressure ring 28 by cushion pins 22, and be used for also if possible determining whether the piston position with arbitrary cushion pins 22 corresponding hydraulic cylinders 30 is in the bottom.More precisely, whether execution in step S5 remains in separately the allowable deviation scope to determine to be stored in peak-peak Fpmax, mean value Fpav in the data storage 116 and frequency of oscillation W, and these allowable deviation scopes are determined according to optimum value Fpmaxo, the Fpavo and the Wo that receive from ID card 66.Represent the data of allowable deviation scope to be stored in the reference data storage device 122 of control module 62.If the value Fpmax of all cushion pins 22, Fpav and W all remain in separately the allowable deviation scope, diagnostics block 120 just judges that blank press force Fs is evenly distributed on the pressure ring 28 via cushion pins 22 so.In this case, control flow turns to step S6 to provide the indication of blank press force Fs equiblibrium mass distribution.If any one value Fpmax, Fpav and the W of arbitrary cushion pins 22 have exceeded the allowable deviation scope, diagnostics block 120 just judges that blank press force Fs is non-equiblibrium mass distribution.In this case, control flow turns to step S7 to provide the indication that blank press force Fs lack of balance distributes.Step S6 and S7 are finished by the display control block 126 in the control module 62 shown in Figure 5, this controll block 126 is used for opening in two indicator lamps 82,84 on display screen shown in Figure 3 and the control panel 68, is normal or unusual with the distribution that shows blank press force Fs.
Is step S8 after the step S7, so as to determine the piston of the hydraulic cylinder 30 of corresponding each cushion pins 22 (having found that in step S5 arbitrary value Fpmax, the Fpav of this cushion pins and W be not all in its allowable deviation scope) whether be in bottom or move downward its stroke lower end.Judge whether piston is in the bottom if determined value Fpmax, Fpav and W whether greater than or be higher than the higher limit of each allowable deviation scope.If step S8 is judged to be acknowledge signal "Yes" (Yes), mean that promptly the piston with cushion pins 22 corresponding hydraulic cylinders 30 is in bottom position, in this case, control flow turns to step S9 so that the initial hydraulic pressure P s of hydraulic cylinder 30 increases a predetermined value a.If step S8 is judged to be negative acknowledge character (NAK) "No" (No), mean that then the piston of corresponding hydraulic cylinder 30 is in its stroke upper end, in this case, control flow turns to step S10 so that initial hydraulic pressure P so reduces a predetermined value beta.If blank press force Fs is a constant, if promptly the Pneumatic pressure Pa of bounce cylinder 32 is a constant, then increase of initial hydraulic pressure P so can cause that hydraulic pressure Psx increases, and hydraulic pressure Psx is produced by hydraulic cylinder 30 in the stamping process of blank 40, therefore, thus the impulse stroke of the piston of hydraulic cylinder 30 will reduce to have eliminated the bottom effect of piston in the stamping process.On the other hand, the reducing of initial hydraulic pressure P so can cause reducing of hydraulic pressure Psx, so the impulse stroke of the piston of hydraulic cylinder 30 will increase in the stamping process, thereby makes piston move downward position in the middle of it from the stroke upper end.Step S9 and S10 are finished by the hydraulic pressure controll block 124 in the control module 62 shown in Figure 5, and this controll block 124 is used for controlling hydraulic pump 52 and hydraulic pressure control circuit 58 to regulate initial hydraulic pressure value P so.By means of diagnosis shown in Figure 5 and hydraulic pressure adjustment process, initial hydraulic pressure P so is adjusted so that blank press force Fs is evenly distributed on the pressure ring 28 via all cushion pins 22 of installing, thereby has guaranteed that blank 40 satisfies the product workmanship requirement of expection in stamping process.
Workflow shown in Figure 5 is to construct like this, promptly when the negative acknowledge character (NAK) "No" (No) that obtains among the step S5 surpasses predetermined times, this workflow should be opened display screen and control panel 68 to indicate corresponding cushion pins 22, more particularly, panel 68 is used to indicate the identification number and the position of the responsive pin 104 of corresponding load.When the adjusting owing to step S9 and S10 makes initial hydraulic pressure P so depart from predetermined allowed band, can provide similar indication on the panel 68.
In workflow shown in Figure 6 according to present embodiment, the allowable deviation scope of peak-peak Fpmax, the mean value Fpav of pin load Fp and frequency of oscillation W determines that according to optimum value Fpmaxo, Fpavo and Wo these optimum values are taken from ID card 66 as the part of die set information on each cushion pins 22.And the allowable deviation scope be used to determine blank 40 whether by blank press force Fs reasonably pressure holding or more particularly be used to determine whether blank press force Fs is evenly distributed on the pressure ring 28 via cushion pins 22.Therefore, when blank 40 by blank press force Fs reasonably during pressure holding, the allowable deviation scope is regarded as a predetermined condition that should satisfy certainly.Equally, need not say more, reference data storage device 122 plays a part the reference data storage apparatus, be used for storing the data of representing predetermined condition, if and blank 40 by pressure holding reasonably, the characteristic value of pin load Fp satisfies these predetermined conditions, and above-mentioned allowable deviation scope depends on the various parameter and the desired product qualities that may cause size, position and other error or deviation, and can be determined according to optimum value Fpmaxo, Fpavo and Wo.For example, by a suitable value is added on optimum value Fpmaxo, Fpavo and the Wo, or deduct a suitable value, or on duty with optimum value, just can determine the upper and lower bound of allowable deviation scope with a proper proportion from optimum value.Step S5 and S8 be used for determining blank 40 whether by the blank press force reasonably pressure holding, whether this detected characteristic value that depends on the load of transmitting via cushion pins 22 satisfies predetermined condition, diagnostics block 20 plays a part diagnostic device, be used for determining that whether blank 40 by pressure holding reasonably, this depends on whether detected characteristic value satisfies predetermined condition.
As shown in Figure 3, three indicator 85-87 are arranged on display screen and the control panel 68, be used to refer to peak-peak Fpmax, the mean value Fpav of load on all cushion pins 22 and the mean value of frequency of oscillation W respectively, be furnished with corresponding button or switch on display screen and the control panel 68.Utilize these switches or button, can perhaps can deposit these mean value in ID card 66 to upgrade the analog value that has deposited in wherein these mean values as the optimum value Fpmaxo that uses in the course of work shown in Figure 6, Fpav and Wo.Like this, in the punch test process, blank 40 is stamped into the product with the quality that requires, and the mean value of resulting thus value Fpmax, Fpav and W can be used as optimum value Fpmaxo, Fpavo and Wo deposits ID card 66 in.
To the implementation process of diagnosis in the control module 62 be described below.This diagnosis is used for detecting the optimum range of blank press force Fs, and in this scope, blank press force Fs is an equiblibrium mass distribution.Block representation among Fig. 7 finish each functional block of diagnostic procedure (seeing flow chart shown in Figure 8) in the control module 62.Diagnostic procedure is from step Q1, at first determine " automatic one is manual " (ANTO-MAN) selector switch 72 whether be in " automatically " position, if step 1 is judged to be acknowledge signal "Yes" (Yes), control flow turns to step Q2 to determine " setting " (SETUP) button 74 whether be depressed.(AUTO) position and " setting " are (SETUP) when button 74 is depressed when selector switch 72 is in " automatically ", and control flow turns to step Q3, and in this step, initial blank press force Fsn is set in ten predetermined values (Fs1 is to Fs10).The every execution of step Q3 once, initial blank press force Fsn is reduced to maximum from maximum successively.Initial blank press force Fsn be exactly when punch die 18 just be placed on pressure ring 28 on the blank 40 blank press force Fs during termination mutually, the blank press force Fs when just bounce cylinder 32 volumes have just begun to reduce before.In the present embodiment, initial blank press force Fs1 is reduced to minimum of a value Fs20=20 ton from maximum Fs1=200 ton, each decrease is 20 tons, these initial blank press force Fs1-Fs10 all are stored in the control module 62, before workflow shown in Figure 8 begins, at first should regulate flow process according to above-mentioned diagnosis shown in Figure 6 and hydraulic pressure, initial hydraulic pressure P so by Hydraulic pump 52 and 58 pairs of balance hydraulic cylinders 30 of hydraulic pressure control circuit carries out suitable adjusting.
After the step Q3 is step Q4, in step Q4, calculates Pneumatic pressure Pa according to above-mentioned formula (2), wherein, uses initial blank press force Fsn (being set by step Q3) as best blank press force Fso.Actual Pneumatic pressure Pa is conditioned and equals calculated value Pa.In first circulation of flow performing, adopt 200 tons initial blank press force Fs1 to calculate Pneumatic pressure Pa in formula (2) lining.Change piece 128 execution in step Q3 and step Q4 by the press force in the control module 62 shown in Figure 7.If the test punching course shows that the number needs of cushion pins 22 will change, can (NUMBER) switch 75 be set by " quantity " that is arranged on display screen and control panel 68 so and change used quantity " n " in the formula (2).
After Pneumatic pressure Pa was adjusted in step Q4, control flow turned to step Q5.Open a nozzle with predetermined sounding pattern.Carry out step Q6 then to determine whether " test punching press " (TEST PRESS) switch 67 on the stamping machine is unlocked.When the operator responded opening of nozzle and opens " test punching press " (TEST PRESS) switch 67, above-mentioned " test punching press " (TEST PRESS) signal SS was used in the control module 62.Execution in step Q7 shut-off nozzle then.After the step Q7 is step QA8, reading the output signal of all load transducers 108 of load value Fp on the corresponding cushion pins 22 of representative, and at this moment slide plate 20 test press cycle process (by " test punching press " (TESTPRESS) switch 67 start) in end motion under its stroke.The load value Fp of the output signal representative of load transducer 108 is stored in the data storage 134 of control module 62.Step Q8 is carried out by DSB data store block shown in Figure 7 130.The analog output signal of load transducer 108 converts data signal to through A/D converter 112, and this data signal is received by DSB data store block 130 and deposits storage data storage 134 (as shown in Figure 7) in by DSB data store block 130.Step Q8 is used for detecting the load Fp that transmits via each cushion pins 22, and the DSB data store block 130 of execution in step Q8 and load detecting device 100 have constituted the device that structure is surveyed load Fp together.
After the step Q8 is among the step Q9.At step Q9, feature calculation piece in the control module 62 shown in Figure 7 136 according to the load value Fp that is stored in 134 li of data storages to the characteristic value of load value Fp on all cushion pins 22, promptly peak-peak Fpmax, mean value Fpav and the frequency of oscillation W to load Fp on each cushion pins 22 calculates.After the step Q9 is step Q10.Step Q10 is carried out by the diagnostics block in the control module 62 shown in Figure 7 138, to determine whether blank press force Fs is evenly distributed on the pressure ring 28 via cushion pins 2.The realization of this deterministic process depends on whether characteristic value Fpmax, the Fpav and the W that calculate satisfy predetermined condition.More precisely, execution in step Q10 with the peak-peak Fpmax, the mean value Fpav that determine all cushion pins 22 and frequency of oscillation W change forever and whether difference remains in separately the predetermined allowable deviation scope, represent the data of these allowable deviation scopes to be stored in the reference data storage device 140.If the variation of the value Fpmax of all cushion pins 22, Fpav and W all remains in separately the allowable deviation scope, diagnostics block 138 just judges that blank press force Fs is evenly distributed on the pressure ring 28 via cushion pins 22 so.In this case, in the test punching course, all be in the middle of it on position, and the load value Fp of all cushion pins 22 is mutual basically etc. with the piston of all cushion pins 22 corresponding hydraulic cylinders 30.If the piston of arbitrary hydraulic cylinder 30 is in the bottom or moves downward its stroke lower end, or remaining on its stroke upper end, the characteristic value Fpmax of corresponding with it so cushion pins 22, Fpav and W certainly will have sizable difference with the analog value of other cushion pins 22.Therefore, can determine whether blank press force Fs is in the equiblibrium mass distribution state according to the variation or the difference of the characteristic value of load Fp on the cushion pins 22.Diagnostics block 138 can be used to determine whether frequency of oscillation W (rather than it changes) remains in the predetermined allowable deviation scope, and is used for determining whether the characteristic value of pin load Fp satisfies predetermined condition.Whether the effect of the diagnostics block 138 of execution in step Q10 is equivalent to a check blank 40 by the reasonable device that keeps of blank press force Fp, and reference data storage device 140 plays a part storage arrangement, be used for the data of storing predetermined condition, diagnostics block 138 utilizes this predetermined condition to judge that blank 40 by pressure holding reasonably.
If step Q10 is judged to be acknowledge signal "Yes" (Yes), control flow turns on the step Q11 openable panel 68 one in ten indicator lamps 78, and this indicator lamp is corresponding with the initial blank press force Fsn that determines at present (being set by step Q3).Step Q11 is carried out by display control block shown in Figure 7 142.After the step Q11 is step Q12, and whether this step is used for determining by the set initial blank press force Fsn of step Q3 is minimum of a value Fs20=20 ton.Change initial blank press force Fsn from 200 tons to 20 tons, repeated execution of steps Q3-Q12.Its result all judges in step Q10 ten all initial blank press force Fsn.Because corresponding to the indicator lamp 78 of the initial blank press force value that in step Q10, obtains acknowledge signal "Yes" (Yes) be unlocked (shown in hatching among Fig. 3), operator thereby can know the optimum range of initial blank press force Fsn, in this scope, blank press force Fs is evenly distributed on the pressure ring 28 via all cushion pins 22.Hatching shown in Figure 3 has been represented an example of initial blank press force Fsn optimum range, and this optimum range is measured by the test punching course of being opened by " test punching press " (TEST PRESS) switch 67.
As mentioned above, diagnostic process shown in Figure 8 allows the operator that the optimum range of initial blank press force Fsn is detected, and in this scope, blank press force Fs is an equiblibrium mass distribution.When die set (comprising drift 10, punch die 18 and pressure ring 28) when being prepared for producing required part, to finish the test punching course by in the detection optimum range, changing initial blank press force Fsn earlier, to detect the best blank press force Fs that guarantees the punching production part quality.In addition, the optimum range that detected initial blank is held power Fsn can be used for regulating blank press force Fs, and blank press force Fs depends on the characteristic of blank 40.If in the optimum range of the initial blank press force Fsn that measures, can not get best blank press force Fs, quantity n of cushion pins 22 (quantity of balance hydraulic cylinder 30) or just suitably change of initial hydraulic pressure P so so, thus the optimum range of initial blank press force Fsn changed.Like this, best blank press force Fs just can drop in the optimum range of initial blank press force Fsn of change.
The system that embodiment constructed according to the invention described above is adapted to the load Fp that is delivered to pressure ring 28 via cushion pins 22 is detected, the load value Fp characteristic that also is used for simultaneously determining selected all cushion pins 22 (more precisely, be peak-peak Fpmax, mean value Fpav and frequency of oscillation W) whether satisfy blank press force Fs and be evenly distributed in this predetermined condition on the pressure ring 28 via cushion pins 22.Detected load Fp has accurately represented local blank press force, and in fact this press force is delivered on the pressure ring 28 via each cushion pins 22.Therefore, this building method can be realized precise diagnosis, with determine blank 40 whether by via the blank press force of cushion pins 22 equiblibrium mass distributions reasonably pressure holding: and can realize complicated adjusting is carried out in the distribution of holding power via the local blank of cushion pins 22.
Inline diagnosis shown in Figure 6 and hydraulic pressure are regulated flow process and are applicable to the stamping system of blank press force Fs equiblibrium mass distribution is diagnosed, and will determine just whether characteristic value Fpmax, the Fpav of load Fp on all cushion pins 22 and W remain in the predetermined allowable deviation scope of determining according to optimum value Fp-max, Fpavo and Wo.If any one is worth the upper limit greater than corresponding allowable deviation scope in three characteristic values of load Fp on arbitrary cushion pins 22, the piston of so just judging the hydraulic cylinder 30 that joins with this cushion pins 22 has arrived bottom (moving downward its stroke lower end) in the press cycle process, and makes initial hydraulic pressure P so of corresponding hydraulic cylinder 30 increase a scheduled volume.If any one is worth the lower limit less than corresponding allowable deviation scope in three characteristic values of load Fp on arbitrary cushion pins 22, the piston of so just judging corresponding hydraulic cylinder 30 is in its stroke upper end in the press cycle process, and makes initial hydraulic pressure P so of this hydraulic cylinder 30 reduce a scheduled volume.Its result, initial hydraulic pressure P so of hydraulic cylinder 30 can be regulated automatically to set up the blank press force Fs of equiblibrium mass distribution.This building method has been simplified the adjustment process of stamping machine, has alleviated stamping machine operator's work load, and has reduced the percent defective of punching production part.It should be noted that especially this building method has not only guaranteed the equiblibrium mass distribution of the blank press force Fs of blank 40 in stamping process, and realized such stamping process: i.e. the peak-peak Fpmax of load Fp on each cushion pins 22, mean value Fpav and frequency of oscillation W all remain on by in optimum value Fpmaxo, Fpavo and the determined predetermined allowable deviation scope of Wo, these optimum values obtain from the ID card, therefore, this building method has guaranteed uniform high quality of products.
Regulate in the preferred form of flow process in inline diagnosis shown in Figure 6 and hydraulic pressure, control module 62 is used to open display screen and control panel 68, when the negative acknowledge character (NAK) "No" (No) that obtains with convenient step S5 surpasses a pre-determined number, perhaps because the regulating action among step S9 and the S10 (carrying out when step S5 obtains negative acknowledge character (NAK)) makes initial hydraulic pressure P so be higher or lower than the upper limit of allowable deviation scope or down in limited time, the position or the identification number of abnormal cushion pins 22 (or the responsive pin 104 of corresponding load or load transducer 108) provided indication.This preferred structural form makes the operator can easily identify abnormal cushion pins 22 or hydraulic cylinder 30, and has simplified the inspection of stamping machine, regulates and maintenance, and the result improves the operating efficiency of stamping system.
On the other hand, diagnostic process shown in Figure 8 is applicable to be diagnosed the stamping system of blank press force Fs equiblibrium mass distribution, to determine just in test press cycle whether the characteristic value Fpmax of load Fp, Fpav and W remain in separately the allowable deviation scope on the cushion pins 22 with different initial blank press force Fsn value operations.Therefore, diagnostic process shown in Figure 8 can be easily and is accurately detected the optimum range of initial blank press force Fsn.In this scope, the blank press force is evenly distributed on the pressure ring 28 via cushion pins 22.
In the present embodiment, sell maximum Fpmax, the mean value Fpav of load Fp and the characteristic value that frequency of oscillation W is used as pin load Fp.These characteristic values can obtain from the waveform of pin load Fp at an easy rate, and can be discerned as numerical value.The utilization detection that characteristic value makes initial blank press force Fsn optimum range that quantizes is easier, more accurate than directly utilizing pin load waveform itself, and the latter needs jumbo reference data storage device 122,140.
In the present embodiment, load detecting device 100 is used for detecting the load value Fp on all cushion pins 22.Load detecting device 100, adding a die set can easily be installed on the common stamping machine.That is to say that when a new die set was installed on the common stamping machine, load sensitive blocks 102 was installed on the platen 12, the cushion pins 22 that the responsive pin 104 of load is housed has replaced the ordinary buffer pin.Like this, under the situation of not doing great structural change, on the common stamping machine this load sensor can be installed easily, economically.
Abovely describe the preferred embodiments of the present invention in detail with reference to accompanying drawing, obviously the present invention can do further to replenish in many aspects.
In illustrated embodiment, the load transducer 108 (shape such as foil gauge) that is used for detecting the load Fp that transmits via cushion pins 22 is installed on the responsive pin 104 of load, and the responsive pin 104 of load is fixed on the upper end of cushion pins 22 and passes through hole on drift 10 matrixes.Drift 10 is installed on the load sensitive blocks 102.But, load transducer (as foil gauge and dynamometer) also can be installed in from buffer board 26 to pressure ring any position on 28 the blank press force bang path.For example, load transducer can be directly installed on the cushion pins 22, or is installed on pressure ring 28 boss with cushion pins 22 terminations that form below.On the other hand, load transducer can also be installed in above-mentioned shown between boss and the cushion pins 22, or be installed between the piston and cushion pins 22 of hydraulic cylinder 30, or be installed between hydraulic cylinder 30 and the buffer board 26.
Although peak-peak Fpmax, mean value Fpav and frequency of oscillation W are used as the characteristic value of pin load Fp in the illustrated embodiment, other characteristic value as the damped coefficient of pin load Fp, also can be used in flow process shown in Figure 6 and/or flow process shown in Figure 8.Peak-peak Fpmax can replace with other peak value (as maximum or minimum of a value), and mean value Fpav also can not be position ST1 and the mean value of ST2 in the corresponding time period with slide plate 20.
Though the pressure chamber of all balance hydraulic cylinders 30 is interconnected, but hydraulic cylinder 30 can be made up of the hydraulic cylinder of two or more groups, these hydraulic cylinders be placed on pressure ring 28 local corresponding zones in, like this, the pressure chamber of every group of hydraulic cylinder is interconnected.In this case, each initial hydraulic pressure value P so that organizes hydraulic cylinder is controlled independently of each other, reference data storage device 122 is being stored the data of representing different reference conditions, and these reference conditions are used for the hydraulic cylinder of respectively organizing that makes blank press force equiblibrium mass distribution is tested.
Illustrated embodiment uses hydraulic cylinder 30 as the fluid driven equilibrium cylinder that makes blank press force equiblibrium mass distribution.But, fluid driven equilibrium cylinder can use the hydraulic fluid (as gel) except that work oil to carry out work.In addition, as long as blank press force Fs is realized that by test pin load Fp principle so of the present invention also is applicable to the stamping system that is not equipped with fluid driven equilibrium cylinder via the diagnosis of the stamping system of cushion pins 22 equiblibrium mass distributions.
Though bounce cylinder 32 is used as the device that the motion of buffer board 26 is applied or produces resistance, resistance also can utilize other device to produce (hydraulic cylinder of for example being furnished with pressure release mechanism), or is produced by a suitable spring.
Obviously, those those skilled in the art can carry out various changes, modification and improvement to the present invention.
Claims (21)
1. the method for a kind of punching press blank (40) in the stamping system, comprise: (a) punch die (18) and a drift (10) are realized the stamping process to above-mentioned blank together, with the profiled surface drawing of blank along drift, (b) buffer board (26), (c) a drag effect device (32), be used for the motion of above-mentioned buffer board is applied resistance, (d) pressure ring (28), in the blank stamping process, push down blank with above-mentioned punch die along the blank periphery, (e) a plurality of cushion pins (22), be placed in parallel to each other between above-mentioned buffer board and the above-mentioned pressure ring, be used for the blank press force based on above-mentioned resistance is delivered on the above-mentioned pressure ring, when when above-mentioned pressure ring and above-mentioned punch die are overcoming the pressing direction of above-mentioned resistance with respect to above-mentioned drift on, moving, stamping process is just realized that said method may further comprise the steps:
Detect in the above-mentioned stamping process via each cushion pins (22) and be delivered to load on the above-mentioned pressure ring (28), and
Determine above-mentioned blank (40) whether by above-mentioned blank press force reasonably pressure holding, whether this at least one predetermined characteristic value that depends on the detected load of transmitting via above-mentioned each cushion pins (22) satisfies qualifications.
2. according to a kind of method of claim 1, it is characterized in that: above-mentioned at least one predetermined characteristic value comprises the peak value of above-mentioned load waveform at least, a value in mean value and the frequency of oscillation, above-mentioned load waveform be in above-mentioned stamping process by above-mentioned punch die and above-mentioned drift along on the above-mentioned pressing direction mutual once move to detect obtain.
3. according to a kind of method of claim 1 or claim 2, it is characterized in that: above-mentioned determination step comprise determine above-mentioned blank by above-mentioned press force reasonably pressure holding, condition is that above-mentioned at least one predetermined characteristic value of above-mentioned detected load remains in the determined preset range of optimum value by above-mentioned each predetermined characteristic value of above-mentioned detected load, and optimum value has guaranteed that above-mentioned blank press force is evenly distributed on the pressure ring (28) via all above-mentioned cushion pins (22).
4. according to any one a kind of method among the claim 1-3, it is characterized in that: above-mentioned determination step comprises determines that above-mentioned blank press force is evenly distributed on the above-mentioned pressure ring (28) via all above-mentioned cushion pins (22) and all a plurality of fluid driven equilibrium cylinders (30), and condition is that above-mentioned at least one predetermined characteristic value satisfies above-mentioned predetermined condition; Above-mentioned compensating cylinder is installed on the above-mentioned buffer board (26); Above-mentioned cushion pins is placed on respectively between above-mentioned pressure ring and the above-mentioned compensating cylinder in parallel to each other; Above-mentioned compensating cylinder has the pressure chamber that communicates mutually.
5. according to a kind of method of claim 4, it is characterized in that: above-mentioned determination step comprises judges that above-mentioned blank press force balancedly is distributed on the above-mentioned pressure ring (and the piston of above-mentioned compensating cylinder all be positioned at about it on centre position between the stroke end) via all above-mentioned cushion pins and all above-mentioned compensating cylinders, and condition is that above-mentioned at least one predetermined characteristic value satisfies above-mentioned predetermined condition; The above-mentioned piston of above-mentioned compensating cylinder is connected with above-mentioned cushion pins respectively.
6. according to a kind of method of claim 5, further may further comprise the steps: the above-mentioned piston of judging at least one above-mentioned compensating cylinder has moved to its stroke lower end or has remained on its stroke upper end above-mentioned striking out in the formation process, condition is that above-mentioned at least one predetermined characteristic value does not satisfy above-mentioned predetermined condition; If above-mentioned at least one predetermined characteristic value does not satisfy above-mentioned predetermined condition, make above-mentioned piston in above-mentioned stamping process, be in above-mentioned centre position with regard to the pressure in the adjustment cylinder so, thereby above-mentioned blank press force is evenly distributed on the above-mentioned pressure ring via above-mentioned cushion pins and above-mentioned compensating cylinder.
7. according to any one a kind of method among the claim 1-6, it is characterized in that: above-mentioned test load step may further comprise the steps: load detects piece (102) and is installed between above-mentioned drift (10) and the platen (12), platen (12) is positioned at buffer board (26) top, the responsive pin of load (104) is connected in series mutually with above-mentioned cushion pins (22) upper end respectively, and the above-mentioned cushion pins that the responsive pin of above-mentioned load is housed passes the through hole (24) on the above-mentioned platen, passing above-mentioned load detects through hole (106) on the piece and also passes through hole on the above-mentioned drift, the length of the responsive pin of each above-mentioned load equates with the height dimension of above-mentioned load detection piece substantially, and on the responsive pin of each above-mentioned load a load transducer (108) is housed all, be used for detection effect load, and this used load is delivered on the above-mentioned pressure ring via above-mentioned each cushion pins.
8. according to any one a kind of method among the claim 1-7, it is characterized in that: further may further comprise the steps, finish a plurality of test press cycle, each circulation comprises makes above-mentioned punch die (18) and above-mentioned pressure ring (28) move with respect to drift (10) overcoming on the above-mentioned pressing direction of above-mentioned resistance, thereby realize the above-mentioned stamping process of above-mentioned blank (40), and when carrying out above-mentioned a plurality of test press cycle, constantly change the above-mentioned Resistance Value that produces by above-mentioned drag effect device (32); Provide a indication about above-mentioned Resistance Value optimum range, in this scope, above-mentioned at least one predetermined characteristic value of above-mentioned detected load satisfies above-mentioned predetermined condition, and above-mentioned detection step and above-mentioned determination step all need be carried out in each above-mentioned test press cycle.
9. according to a kind of method of claim 8, it is characterized in that: the finishing of above-mentioned a plurality of test press cycle comprise change as the pressure in the bounce cylinder (32) of above-mentioned drag effect device with supporting buffer board (26), thereby when above-mentioned test press cycle was carried out, the above-mentioned value of above-mentioned resistance was changed to change above-mentioned blank press force.
10. a kind of method of punching press blank (40) comprising in the stamping system: (a) punch die (18) and a drift (10) they realize the stamping process of above-mentioned blank together, make the profiled surface drawing of blank along drift, (b) buffer board (26), (c) a plurality of fluid driven equilibrium cylinders (30), be installed on the above-mentioned buffer board and have the pressure chamber that each is interconnected, (d) a drag effect device (32), be used for the motion of above-mentioned buffer board is applied resistance, (e) pressure ring (28), in stamping process, push down blank with above-mentioned punch die along the blank periphery, (f) a plurality of cushion pins (22), be placed in parallel to each other respectively between above-mentioned pressure ring and the above-mentioned compensating cylinder, be used for the blank press force based on above-mentioned resistance is delivered on the above-mentioned pressure ring, and when above-mentioned pressure ring and above-mentioned punch die are overcoming on the pressing direction of above-mentioned resistance with respect to above-mentioned drift motion, above-mentioned stamping process is just realized that said method may further comprise the steps:
Detection is delivered to load on the above-mentioned pressure ring (28) via each above-mentioned cushion pins (22) in above-mentioned stamping process; And
Judge that above-mentioned blank press force is evenly distributed on the above-mentioned pressure ring (28) via above-mentioned cushion pins, condition is that at least one predetermined characteristic value of the detected load transmitted via above-mentioned each cushion pins (22) satisfies predetermined condition.
11. a kind of process for stamping according to claim 10, it is characterized in that: each above-mentioned fluid driven equilibrium cylinder (30) all have one with a corresponding piston that above-mentioned cushion pins joins, and above-mentioned at least one predetermined characteristic value of above-mentioned detected load comprises one in the frequency of oscillation of predetermined load value and above-mentioned detected load waveform, above-mentioned determination step comprises judges that above-mentioned blank press force is evenly distributed on the above-mentioned pressure ring (and the above-mentioned piston of all above-mentioned compensating cylinders all is on the centre position between its stroke upper and lower side) via above-mentioned cushion pins, condition is concerning all above-mentioned a plurality of cushion pins, and above-mentioned one in above-mentioned predetermined load value and the above-mentioned frequency of oscillation remains in the predetermined allowable deviation scope.
12. a kind of process for stamping according to claim 11, it is characterized in that: further may further comprise the steps: if at least one above-mentioned cushion pins, above-mentioned upper limit greater than above-mentioned predetermined allowable deviation scope in above-mentioned predetermined load value and the above-mentioned frequency of oscillation so just judges that the above-mentioned piston of at least one above-mentioned compensating cylinder has moved to its stroke lower end in above-mentioned stamping process; If at least one above-mentioned cushion pins, above-mentioned lower limit less than above-mentioned predetermined allowable deviation scope in above-mentioned predetermined load value and the above-mentioned frequency of oscillation so just judges that the above-mentioned piston of at least one above-mentioned compensating cylinder remains on its stroke upper end in above-mentioned stamping process.
13. according to appointing any one a kind of method among the claim 10-12, it is characterized in that: at least one predetermined characteristic value comprises at least one in peak value, mean value and the frequency of oscillation of above-mentioned detected load waveform, and this detected load is to obtain along mutual once moving on the above-mentioned pressing direction by above-mentioned punch die and above-mentioned drift in above-mentioned stamping process.
14. according to any one a kind of method among the claim 10-13, it is characterized in that: above-mentioned test load step may further comprise the steps: load detects piece (102) and is installed between above-mentioned drift (10) and the platen (12), and platen (12) is positioned at buffer board (26) top; The responsive pin of load (104) is connected in series mutually with the upper end of above-mentioned cushion pins (22) respectively, like this, the above-mentioned cushion pins that the responsive pin of above-mentioned load is housed passes the through hole (24) on the above-mentioned platen, pass the through hole (106) on the above-mentioned load detection piece, also pass the through hole on the above-mentioned drift, the length of the responsive pin of each above-mentioned load equates with the height dimension of above-mentioned load detection piece substantially, and on the responsive pin of each above-mentioned load a load transducer (108) is housed all, be used for detection effect load, and this used load is delivered on the above-mentioned pressure ring via above-mentioned each cushion pins.
15. according to any one a kind of method among the claim 10-14, further may further comprise the steps: finish a plurality of test press cycle, each circulation comprises makes above-mentioned punch die (18) and above-mentioned pressure ring (28) upwards move with respect to drift (10) at the above-mentioned process for stamping that overcomes above-mentioned resistance, thereby realize the above-mentioned stamping process of above-mentioned blank (40), and when carrying out above-mentioned a plurality of test press cycle, constantly change the above-mentioned Resistance Value that produces by above-mentioned drag effect device (32), provide a indication about above-mentioned Resistance Value optimum range, in this scope, above-mentioned at least one predetermined characteristic value of above-mentioned detected load satisfies above-mentioned predetermined condition, and above-mentioned detection step and above-mentioned determination step all need carry out in each above-mentioned test press cycle.
16. a kind of method according to claim 15, it is characterized in that: above-mentioned the finishing of a plurality of test press cycle comprises that the pressure that changes in the bounce cylinder (32) that is used as the drag effect device is with supporting buffer board (26), thereby when above-mentioned test press cycle was carried out, the above-mentioned value of above-mentioned resistance was changed to change above-mentioned blank press force.
17. a stamping system comprises (a) punch die (18) and a drift (10), they realize the stamping process of blank together, make the profiled surface drawing of blank along drift, (b) buffer board (26), (c) drag effect device (32), be used for the motion of above-mentioned buffer board is applied resistance, (d) pressure ring (40), in stamping process, push down blank with above-mentioned punch die along the blank periphery, (e) a plurality of cushion pins (22), be placed in parallel to each other between above-mentioned buffer board and the above-mentioned pressure ring, be used for the blank press force based on above-mentioned resistance is delivered on the above-mentioned pressure ring, thereby when above-mentioned pressure ring and above-mentioned punch die were overcoming on the pressing direction of above-mentioned resistance with respect to above-mentioned drift motion, above-mentioned stamping process was just realized.Above-mentioned stamping system comprises:
Load detecting device (62,100,114) is used for detecting in the above-mentioned stamping process load that above-mentioned cushion pins (22) is delivered on the above-mentioned pressure ring (28) via each;
Reference data storage apparatus (122), be used for storage and represent predetermined condition and data, if and above-mentioned blank (40) by above-mentioned blank press force reasonably pressure holding, at least one predetermined characteristic value of the detected load of transmitting via each cushion pins (22) satisfies this predetermined condition so.
Diagnostic device (62,120), be used for determining above-mentioned blank (40) whether by above-mentioned blank press force reasonably pressure holding, whether this above-mentioned at least one predetermined characteristic value that depends on above-mentioned detected load satisfies predetermined condition.
18. a kind of stamping system according to claim 19 is characterized in that: further comprise: a platen (12), be packed between above-mentioned buffer board (26) and the above-mentioned drift (10), have through hole (24); And above-mentioned cushion pins (22) passes the through hole on the above-mentioned platen, also passes the through hole on the above-mentioned drift, the lower end of above-mentioned like this cushion pins supported by above-mentioned buffer board and on it end bearing pressure ring.
And the above-mentioned load detecting device (100) in the system is included in above-mentioned load detecting device (62,100,114) in, this load detecting device (100) comprising: load detects piece (102), is installed between above-mentioned platen and the above-mentioned drift and has a plurality of through holes (106) that allow above-mentioned cushion pins pass respectively; The responsive pin of load (104), be connected in series mutually with the above-mentioned upper end of above-mentioned cushion pins respectively, its length equates with the height dimension of above-mentioned load detection piece substantially, on the responsive pin of each above-mentioned load load transducer (108) is housed all, be used for detection effect load, this used load is delivered on the above-mentioned pressure ring via above-mentioned each cushion pins.
19. a kind of stamping system according to claim 17 or 18 further comprises:
A die set information-storing device (66) is used for being stored as mold information, and this information comprises in above-mentioned at least one predetermined characteristic value of the tested turbid load of transmitting via above-mentioned each cushion pins the optimum value of each; And
A receiver (64), be used for from above-mentioned die set information-storing device, receiving above-mentioned die set information, above-mentioned reference data storage apparatus (122), be used for storing the data of allowable deviation scope of above-mentioned each predetermined characteristic value of the above-mentioned detected load of representative, the allowable deviation scope is here determined by above-mentioned optimum value.
20. and a kind of load detecting device of using together of the stamping system that proposes in the claim 17, be used for the above-mentioned load that is delivered on the above-mentioned pressure ring (28) via above-mentioned every cushion pins (22) is detected, in this case, above-mentioned buffer board (26) is when overcoming above-mentioned resistance and moving downward, keep level substantially, above-mentioned drift (10) is packed on the platen (26) that is positioned at above-mentioned buffer board top, above-mentioned a plurality of cushion pins passes the through hole on above-mentioned platen and the above-mentioned drift, above-mentioned pressure ring is being supported in the top by above-mentioned buffer board supporting in above-mentioned like this cushion pins lower end, and above-mentioned load detects to put to adorn and comprises:
A load detects piece (102), is installed within above-mentioned platen (12) and the above-mentioned drift (10), and has the through hole (106) that passes for above-mentioned cushion pins (22); And
The responsive pin of load (104), be connected in series mutually with the above-mentioned upper end of above-mentioned cushion pins respectively, its length equates with the height dimension of above-mentioned load detection piece substantially, on each above-mentioned load test pin a load transducer (108) is housed all, be used for detection effect load, this used load is delivered on above-mentioned withstand voltage not (28) via above-mentioned each cushion pins.
21. a kind of load detecting device according to claim 20 is characterized in that: each above-mentioned load transducer (108) comprises a foil gauge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP107212/95 | 1995-05-01 | ||
| JP7107212A JP2776296B2 (en) | 1995-05-01 | 1995-05-01 | Press working method, press working device, and pin transmitted load detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1137427A true CN1137427A (en) | 1996-12-11 |
Family
ID=14453336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96100233A Pending CN1137427A (en) | 1995-05-01 | 1996-04-30 | Pressing method and system |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0740968A1 (en) |
| JP (1) | JP2776296B2 (en) |
| KR (1) | KR960040493A (en) |
| CN (1) | CN1137427A (en) |
| CA (1) | CA2175407A1 (en) |
Cited By (4)
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|---|---|---|---|---|
| CN104324979A (en) * | 2014-09-04 | 2015-02-04 | 宁波澳玛特高精冲压机床股份有限公司 | Stamping test apparatus of punch |
| CN107303594A (en) * | 2016-04-22 | 2017-10-31 | 会田工程技术有限公司 | The pad adjusting apparatus and method of die cushion |
| CN109513797A (en) * | 2017-09-19 | 2019-03-26 | 丰田自动车株式会社 | Briquetting process and compression molding device |
| CN117225964A (en) * | 2023-11-14 | 2023-12-15 | 泰州宏润金属科技有限公司 | Sheet metal stamping control system |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19711780A1 (en) * | 1997-03-21 | 1998-09-24 | Schuler Pressen Gmbh & Co | Drawing device for drawing presses |
| GB2406817B (en) * | 2003-01-10 | 2005-06-15 | Daimler Chrysler Ag | Moulding device |
| DE10300630B4 (en) | 2003-01-10 | 2005-03-24 | Daimlerchrysler Ag | Molding facility |
| JP2006130523A (en) | 2004-11-04 | 2006-05-25 | Fanuc Ltd | Die cushion mechanism, and controller and control method therefor |
| JP4833695B2 (en) * | 2005-03-15 | 2011-12-07 | 新日本製鐵株式会社 | Press machine |
| JP4610635B2 (en) * | 2008-06-02 | 2011-01-12 | ファナック株式会社 | Die cushion mechanism, control device and control method thereof |
| JP5802230B2 (en) | 2013-03-14 | 2015-10-28 | アイダエンジニアリング株式会社 | Drawing method and servo press system |
| TWI579069B (en) * | 2014-03-20 | 2017-04-21 | Displacement compensation and feedback system | |
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| CN104959446A (en) * | 2015-07-13 | 2015-10-07 | 上海凌云汽车模具有限公司 | Device for measuring stamping force needed by die |
| CN105015020A (en) * | 2015-07-21 | 2015-11-04 | 天津市天锻压力机有限公司 | Closed-loop pressure regulation control system for four corners of hydraulic die cushions and pressure regulation control method |
| CN105690857B (en) * | 2016-04-08 | 2017-06-09 | 袁晓忠 | A kind of automatic cold storage plate hydraulic die and control method |
| CN108057780A (en) * | 2017-12-18 | 2018-05-22 | 重庆安亚模具制造有限公司 | A kind of pressure changeable drawing die |
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| CN108500152B (en) * | 2018-03-27 | 2023-12-22 | 斯沃博达汽车电子（昆山）有限公司 | Automobile hardware pressing device |
| JP7139970B2 (en) * | 2019-01-23 | 2022-09-21 | マツダ株式会社 | Mold forming load measuring device and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4745792A (en) * | 1986-10-14 | 1988-05-24 | Aluminum Company Of America | Blankholder for a draw press |
| DE69331974T2 (en) * | 1992-11-05 | 2003-01-23 | Toyota Jidosha K.K., Toyota | METHOD AND DEVICE FOR REGULATING CHECKING OR OPTIMIZING THE PRESSURE OF A CYLINDER PIN BY A LIQUID OR INITIAL PRESSURE EXHAUST |
| IT1260615B (en) * | 1993-03-02 | 1996-04-22 | Fiat Auto Spa | PROCEDURE AND HYDRAULIC PRESS FOR THE MOLDING OF SHEETS |
| JP2776196B2 (en) * | 1993-04-28 | 1998-07-16 | トヨタ自動車株式会社 | Diagnosis method and device for pressure equalizing cushion device |
-
1995
- 1995-05-01 JP JP7107212A patent/JP2776296B2/en not_active Expired - Lifetime
-
1996
- 1996-03-25 KR KR1019960008204A patent/KR960040493A/en not_active Application Discontinuation
- 1996-04-30 CN CN96100233A patent/CN1137427A/en active Pending
- 1996-04-30 EP EP96106834A patent/EP0740968A1/en not_active Withdrawn
- 1996-04-30 CA CA002175407A patent/CA2175407A1/en not_active Abandoned
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| CN104324979A (en) * | 2014-09-04 | 2015-02-04 | 宁波澳玛特高精冲压机床股份有限公司 | Stamping test apparatus of punch |
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| CN107303594B (en) * | 2016-04-22 | 2020-05-08 | 会田工程技术有限公司 | Shim adjustment apparatus and method for die cushion apparatus |
| CN109513797A (en) * | 2017-09-19 | 2019-03-26 | 丰田自动车株式会社 | Briquetting process and compression molding device |
| CN109513797B (en) * | 2017-09-19 | 2021-12-28 | 丰田自动车株式会社 | Press molding method and press molding apparatus |
| CN117225964A (en) * | 2023-11-14 | 2023-12-15 | 泰州宏润金属科技有限公司 | Sheet metal stamping control system |
| CN117225964B (en) * | 2023-11-14 | 2024-02-09 | 泰州宏润金属科技有限公司 | Sheet metal stamping control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2175407A1 (en) | 1996-11-02 |
| JP2776296B2 (en) | 1998-07-16 |
| EP0740968A1 (en) | 1996-11-06 |
| JPH08300058A (en) | 1996-11-19 |
| KR960040493A (en) | 1996-12-17 |
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