CN1721098A - Die cushion device for press machine - Google Patents

Abstract

The invention aims to provide a die cushion device of a press machine, which can manufacture a plurality of products with different sizes on 1 press machine and realize small scale of production equipment. In order to achieve the above object, a plurality of die cushion units each having a cushion pad and an elevation driving portion for moving the cushion pad up and down are provided in parallel in a direction orthogonal to a conveying direction of a workpiece with respect to a press machine. Further, the die cushion unit includes a control unit for controlling the plurality of die cushion units to operate independently of each other.

Description

The die cushion of press

Technical field

The present invention relates to the die cushion of press, be specifically related to be suitable for the die cushion of the press in the production equipment of the different various products of manufacturing dimension.

Background technology

The press A of enforcement deep-draw processing shown in Figure 16, have counterdie (punch) E that is installed on the lathe bed B and be installed in patrix (die) U on the slide block S, has die cushion C simultaneously, via the holding pad H of buffer bar R elevating movement by the inside that is located at lathe bed B.

Above-mentioned die cushion C, have the cushion pad Cp that is provided with freely in the lifting of the inside of lathe bed B and be used to make the servo fluid cylinder Cs of oil pressure of this cushion pad Cp elevating movement, when falling slide block S deep processing material W, by via holding pad H, pressure with regulation compresses material W to patrix, plays the effect that prevents from goods to produce " crackle " or " wrinkle " etc.

In addition, above-mentioned die cushion C, based on the positional information of holding pad H and to the pressure information of material W, as shown in figure 17, motion (dotted line) along with slide block S (patrix U), shown in solid line (die buffer motion), by sequential operation controls such as preaceleration stroke a, deep-draw stroke b, auxiliary lift c, locking d.

In addition, the die cushion of press not only as the driving mechanism of holding pad, also is used as " bending " or the buffer unit of various pressure processing such as " stamping-outs " and the jacking system of following based on " deep-draw " of goods certainly.

, in the representational goods made from pressure processing how, can enumerate the shell of automobile, but since constitute the kind of the sheet material of 1 automobile have multiple, so the problem that exists production equipment to maximize for no reason.

Promptly, constitute the sheet material of 1 automobile, shown in Figure 18 A～Figure 18 C, mainly be divided into A step (massive article) Pa such as top board or chassis, B such as door-plate or hood step (medium-sized goods) Pb, and 3 kinds of C steps such as various pillars or frame cross (small-sized goods) Pc etc., A step Pa, be arranged side by side the last manufacturing of pressure processing line (the continuous punch line of tandem) PLa of the press Aa of many special uses by workpiece charger T, B step Pb, be arranged side by side the last manufacturing of pressure processing line (the continuous punch line of tandem) PLb of the press Ab of many special uses by workpiece charger T, C step Pc is being arranged side by side the last manufacturing of pressure processing line (the continuous punch line of tandem) PLc of the press Ac of many special uses by workpiece charger T in addition.

So, in production equipment in the past, owing to use special-purpose press Aa, press Ab and press Ac respectively, make A step Pa, B step Pb and C step Pc, so make the whole sheet materials that constitute 1 automobile, need many pressure processing lines, have the problem that production equipment is maximized for no reason inevitably.

Summary of the invention

The present invention proposes in view of the above fact, and its purpose is, a kind of die cushion of press is provided, its can be on 1 press the different various products of manufacturing dimension, and then can realize the small-scaleization of production equipment.

For achieving the above object, the die cushion of the press of the 1st invention is characterized in that: be arranged side by side a plurality of die cushions with cushion pad and lifting drive division that this cushion pad is moved up and down along the direction with workpiece carriage direction quadrature in lathe bed.

According to the die cushion of press of the 1st invention, by being arranged side by side a plurality of die buffers unit along direction with workpiece carriage direction quadrature, can be on 1 press the different various products of manufacturing dimension.

In addition, according to the die cushion of press of the 1st invention since can be on 1 press the different various products of manufacturing dimension, so also can realize making the small-scaleization as much as possible of the production equipment of various products.

The die cushion of the press of the 2nd invention as described in the die cushion of the 1st press of inventing, is characterized in that: have and can distinguish the control part of the described a plurality of die buffers of running control unit independently.

Die cushion according to the 2nd press of inventing, can distinguish the control part of the described a plurality of die cushions of running control independently owing to have, so in each die buffer unit, can be with each workpiece as manipulating object, or specific die buffer unit is played a role.

The die cushion of the press of the 3rd invention as described in the die cushion of the 2nd press of inventing, is characterized in that: for a plurality of described die buffer unit of general mutually workpiece as manipulating object, synchronously turn round mutually and control.

Die cushion according to the 3rd press of inventing, because for a plurality of described die buffer unit of mutually general workpiece as manipulating object, synchronously running control mutually is so can moulding can stride the workpiece of the size of a plurality of die buffers unit.

Description of drawings

Fig. 1 is the schematic section front view of an embodiment of the die cushion of expression press of the present invention.

Fig. 2 is the main position vertical view of an embodiment of expression die cushion of the present invention.

Fig. 3 is the III-III line profile among Fig. 2 of an embodiment of expression die cushion of the present invention.

Fig. 4 is the pie graph of the control system in the die cushion shown in Figure 1.

Fig. 5 A, Fig. 5 B, Fig. 5 C are the diagrammatic top view of expression at the corresponding situation of the die cushion of various goods.

Fig. 6 is the schematic diagram of the formation of the die cushion of expression when making small-sized goods.

Fig. 7 is the stereoscopic figure of the formation of the general mould of expression.

Fig. 8 is the schematic diagram of the formation of the die cushion of expression when making medium-sized goods.

The schematic diagram of the formation of the die cushion when Fig. 9 is expression manufacturing massive article.

Figure 10 A and Figure 10 B are the diagrammatic top view of expression at the corresponding situation of the die cushion of various goods.

Figure 11 is that A and Figure 11 B are the diagrammatic top view of expression at the corresponding situation of the die cushion of various goods.

Figure 12 is the ideograph of other embodiment of the die buffer unit in the expression die cushion of the present invention.

Figure 13 is the ideograph of other embodiment of the die buffer unit in the expression die cushion of the present invention.

Figure 14 is the ideograph of other embodiment of the die buffer unit in the expression die cushion of the present invention.

Figure 15 is the ideograph of other embodiment of the die buffer unit in the expression die cushion of the present invention.

Figure 16 is an overall schematic of representing press in the past.

Figure 17 is the work line chart of the mode of the motion in the expression die cushion.

Figure 18 A, Figure 18 B, Figure 18 C are the diagrammatic top view that the pressure processing line that press in the past constructs is adopted in expression.

The specific embodiment

Below, with reference to the accompanying drawing of expression embodiment, describe the present invention in detail.

Fig. 1～Fig. 4 is illustrated in the press that is used for metal material (workpiece) is processed into the plate of the shape that requires in the production equipment as automobile, uses the example of die cushion of the present invention.In addition, the integral body of press constitutes since with the essentially no variation of press A in the past shown in Figure 16, so the detailed description that the integral body of relevant press constitutes omission.

As Fig. 1～shown in Figure 3, the Unit the 13 and the 4th, Unit the 12, the 3rd, Unit the 11, the 2nd, Unit the 1st (die buffer unit) (die buffer unit) (die buffer unit) (die buffer unit) 14 that constitutes die cushion 10 is set on the pedestal that is installed in ground press 1 (lathe bed) 2.

Above-mentioned the 1st unit 11, the lift drive mechanism that has the cushion pad 11P that overlooks rectangular shape and this cushion pad 11P is moved up and down are the servo fluid cylinder 11S of a pair of oil pressure, 11S.

In addition, above-mentioned cushion pad 11P is housed in next door 2B the perisporium 2A of pedestal 2 is divided in 4 subregions 1, is located at freely on the described pedestal 2 by making base rail g and pad 1 sliding-contact, sliding up and down.

In addition, the servo fluid cylinder 11S of a pair of oil pressure, 11S are fixed on the crossbeam 2C of the inside that is erected at pedestal 2, by connecting mutual oil circuit with pipe arrangement 11p, 11p, constitute in the mode that works asynchronously as 1 servo fluid cylinder of oil pressure just.

In addition, the servo fluid cylinder 11S of described oil pressure, identical with the servo fluid cylinder of oil pressure in the past the die cushion, have the structure of suitable variation wrinkle compaction pressure, stroke, locked position etc. certainly.

Above-mentioned the 2nd unit 12, also same with the 1st unit 11, have the cushion pad 12P and the servo fluid cylinder 12S of a pair of oil pressure, the 12S that overlook rectangular shape, above-mentioned cushion pad 12P slides up and down and takes in freely in 1 subregion that is arranged on pedestal 2, the servo fluid cylinder 12S of described a pair of oil pressure, 12S constitute in the mode of working as 1 servo fluid cylinder of oil pressure.

In addition, above-mentioned the 3rd unit 13, also same with the 1st unit 11, have the cushion pad 13P and the servo fluid cylinder 13S of a pair of oil pressure, the 13S that overlook rectangular shape, above-mentioned cushion pad 13P, slide up and down and take in freely in 1 subregion that is arranged on pedestal 2, the servo fluid cylinder 13S of described a pair of oil pressure, 13S constitute in the mode of working as 1 servo fluid cylinder of oil pressure.

In addition, above-mentioned the 4th unit 14, also same with the 1st unit 11, have the cushion pad 14P and the servo fluid cylinder 14S of a pair of oil pressure, the 14S that overlook rectangular shape, above-mentioned cushion pad 14P, slide up and down and take in freely in 1 subregion that is arranged on pedestal 2, the servo fluid cylinder 14S of described a pair of oil pressure, 14S constitute in the mode of working as 1 servo fluid cylinder of oil pressure.

Herein, described the 12, the 3rd unit 13, Unit the 11, the 2nd, Unit the 1st and the 4th unit 14, be arranged side by side in direction with workpiece carriage direction (among Fig. 1 vertical direction) quadrature with paper, cushion pad 11P, 12P, 13P, 14P on each unit 11～14 thus is to dispose just like in the direction with workpiece carriage direction quadrature 1 big die cushion being divided into 4 modes.

Promptly, the 12, the 3rd unit 13, Unit the 11, the 2nd, Unit the 1st and the 4th unit 14,1 operation in pressure processing, disposing for the position mode of using simultaneously, in addition, by at the Work conveying apparatus such as vacuum cup that extend with the direction of workpiece carriage direction quadrature, the mode of transporting of carrying out material/goods simultaneously disposes.

In addition, described die cushion 10 has operation control section (controlling organization) 20, and as described later, described the 12, the 3rd unit 13, Unit the 11, the 2nd, Unit the 1st of control and the 4th unit 14 independently of each other or mutually synchronously turn round.

Described operation control section 20, have the 1st control part 21 of independent control the 1st unit 11, in the 1st control part 21, same with die cushion in the past, position-based information and pressure information are by desired die buffer motion (with reference to 17) running control the 1st unit 11.

In addition, described operation control section 20, the 2nd control part 22 with independent control the 2nd unit 12, the 3rd control part 23 of independent control the 3rd unit 13, and the 4th control part 24 of independent control the 4th unit 14, these the 2nd control parts 22～the 4th control part 24, also same with the 1st control part 21, position-based information and pressure information are by desired die buffer motion (with reference to 17) running control the 2nd control part 22～the 4th control part 24.

In addition, described operation control section 20, together has master control portion 25 with described the 1st control part 21～the 4th control part 24, this master control portion 25, by based on job status from the input of guidance panel 26 grades of press 1, as described later, to control the 1st control part 21～the 4th control part 24 output instruction signals, govern the independently running control of the 12, the 3rd unit 13, Unit the 11, the 2nd, Unit the 1st and the 4th unit 14, in combination arbitrarily, synchronously described Unit the 1st～the 4th unit 14 is controlled in running mutually simultaneously.

; in above-mentioned press 1; can be that A step, medium-sized goods such as top board are that B steps such as door-plate and small-sized goods are that C steps such as frame cross are as manipulating object with massive article; shown in Fig. 5 A; at manipulating object is under the situation of A step Pa; Unit the 1st～the 4th unit 14 is whole, is used for the manufacturing of 1 general A step Pa.

In addition, shown in Fig. 5 B, be under the situation of B step Pb at manipulating object, adjacent Unit the 1st and the 2nd unit 12 and the 3rd unit 13 and the 4th unit 14 are whole, be respectively applied for the manufacturing of 1 general B step Pb, therefore can make the manufacturing that adds up to 2 B step Pb, Pb.

In addition, shown in Fig. 5 C, be under the situation of C step Pc at manipulating object, Unit the 1st～the 4th unit 14 is whole, can be respectively applied for to make each 1 C step Pc, therefore can make to add up to 4 C step Pc, Pc, Pc, Pc.

Herein, Fig. 1 and Fig. 4, be the embodiment during as object as Fig. 5 C step (small-sized goods) Pc, in the pedestal 2 of press 1, in Unit the 1st, the upper area of the 12, the 3rd unit 13, Unit the 2nd and the 4th unit 14, by backing plate 3, counterdie L1, counterdie L2, counterdie L3, counterdie L4 are set respectively.

In addition, in Unit the 1st, the upper area of the 12, the 3rd unit 13, Unit the 2nd and the 4th unit 14,, holding pad H1, holding pad H2, holding pad H3 and holding pad H4 are set by cushion pins CP1, cushion pins CP2, cushion pins CP3 and cushion pins CP4.

In addition, on the slide block 4 of press 1 and position described counterdie L1, counterdie L2, counterdie L3, counterdie L4 subtend,, patrix U1, patrix U2, patrix U3 and patrix U4 are installed respectively by retainer 5.

Below, Fig. 1 and Fig. 4 explanation with reference to the whole figure of representing die cushion 10, in the press 1 of above-mentioned formation, the running control mode when A step Pa, B step Pb shown in shop drawings 5A, Fig. 5 B, Fig. 5 C and C step Pc with respect to the 1st unit 11～the 4th unit 14.

In the press 1 of above-mentioned formation, under the situation of the C step Pc (with reference to Fig. 5 C) that makes 4 same shapes, as shown in Figure 6, upper area in the 1st unit 11～the 4th unit 14 is provided with counterdie L1～L4 and holding pad H1～H4, patrix U1～the U4 corresponding with counterdie L1～L4 is set on slide block 4 simultaneously, with respect to each mould, supply with the material Wc of C step Pc.

The operation control section 20 of die cushion 10, based on job status (" making 4 C steps ", " specification of C step " etc.) from guidance panel 26 inputs, by the 1st control part 21～the 4th control part 24, by the desired die-cushion (with reference to Figure 17) corresponding with the specification of C step Pc, the 1st unit 11～the 4th unit 14 is controlled in running independently of each other.

; as shown in Figure 7; establish the footing guiding La and the footing guiding Ua of prism-shaped in four cornicults of counterdie L1 and patrix U1; four jiaos guiding recess Ha and described footing guiding Ua sliding-contact by described holding pad H1; described guiding recess Ha is moved up and down with respect to counterdie L1 by footing guiding Ua guiding simultaneously.

Make the servo fluid cylinder 11S of oil pressure, the 11S of the 1st unit 11 that holding pad H1 moves up and down, be provided with, as mentioned above, interconnect, work like that just like 1 servo fluid cylinder of oil pressure by pipe arrangement 11p, 11p although arrange along the workpiece carriage direction as shown in Figure 3.In addition, also can form the structure that 1 servo fluid cylinder of oil pressure is set.

In addition, in the press 1 of described formation, make at the same time under the situation of 2 B step Pb (with reference to Fig. 5 B), as shown in Figure 8, the 1st unit 11 on pedestal 2 and the upper area of the 2nd unit 12, and the upper area of the 3rd unit 13 and the 4th unit 14, counterdie L11 and counterdie L12 and holding pad H11 and holding pad H12 are set respectively, patrix U11 and the patrix U12 corresponding with counterdie L11 and counterdie L12 are set on slide block 4 simultaneously, with respect to each mould, supply with the material Wb of B step Pb.

The operation control section 20 of die cushion 10, based on from the job status of guidance panel 26 input (" making 2 B steps ", " with by the general material in the 1st unit 11 and the 2nd unit 12 as manipulating object ", " to pass through the general material in the 3rd unit 13 and the 4th unit 14 ", " specification of B step " etc. as manipulating object), by the desired die-cushion (with reference to Figure 17) corresponding with the specification of B step Pb, running control the 1st unit 11 and the 2nd unit 12 and the 3rd unit 13 and the 4th unit 14.

Herein, in described operation control section 20, mutually synchronously running control is used to make the 1st unit 11 and the 2nd unit 12 of a side B step Pb, simultaneously mutually synchronously running control be used to make the 3rd unit 13 and the 4th unit 14 of the opposing party's B step Pb.

That is, the 1st unit 11 and the 2nd unit 12 are by based on the command signal from the 1st control part 21, running control the 1st unit 11, based on the feedback signal of the work of following the 1st unit 11, control the control method of the so-called main/slave mode of the 2nd unit 12, mutually synchronously running control simultaneously.

Equally, the 3rd unit 13 and the 4th unit 14 are by based on the command signal from the 3rd control part 23, running control the 3rd unit 13, based on the feedback signal of the work of following the 3rd unit 13, control the control method of the so-called main/slave mode of the 4th unit 14, mutually synchronously running control simultaneously.

So, by respectively synchronously running control the 1st unit 11 and the 2nd unit 12, with the 3rd unit 13 and the 4th unit 14, holding pad H11 and holding pad H12, with the direction of workpiece carriage direction quadrature, no anyly move up and down obliquely, and then can prevent the damage of the die device that the inclination of holding pad causes in advance.

In addition, certainly can suitably set at all situations: will be that the 1st unit 11 of manipulating object and any one of the 2nd unit 12 are controlled as mainly turning round with general material Wb, or will be that the 3rd unit 13 of manipulating object and any one of the 4th unit 14 are controlled as main running with general material Wb.

In addition, in the press 1 of above-mentioned formation, under the situation of making 1 A step Pa (with reference to Fig. 5 A), as shown in Figure 9, the upper area of the 1st unit 11～the 4th unit 14 on lathe bed 2 is provided with 1 counterdie L20 and 1 holding pad H20, the patrix U20 corresponding with counterdie L20 is set on slide block 4 simultaneously, supplies with the material Wa of A step Pa.

The operation control section 20 of die cushion 10, based on from the job status of guidance panel 26 input (" making 1 A step ", " to pass through the general material in unit, the 1st unit 11～the 4th 14 ", " specification of A step " etc.) as manipulating object, utilize the desired die-cushion (with reference to Figure 17) corresponding, running control the 12, the 3rd unit 13, Unit the 11, the 2nd, Unit the 1st and the 4th unit 14 with the specification of A step Pa.

Herein, synchronously running control the 12, the 3rd unit 13, Unit the 11, the 2nd, Unit the 1st and the 4th unit 14 mutually in described operation control section 20.

Promptly, the 1st unit 11～the 4th unit 14, by based on command signal from the 1st control part 21, running control the 1st unit 11, while is based on the feedback signal of the work of following the 1st unit 11, control the control method of the so-called main/slave mode of the 12, the 3rd unit 13, Unit the 2nd and the 4th unit 14, mutually synchronously running control.

So, by respectively synchronously running control the 1st unit 11 and the 2nd unit 12 and the 3rd unit 13 and the 4th unit 14, holding pad H20, with the direction of workpiece carriage direction quadrature, no anyly move up and down obliquely, and then can prevent the damage of the die device that the inclination of holding pad causes in advance.

In addition, can suitably set at all situations certainly: any one of the 1st unit 11～the 4th unit 14 that will be manipulating object with general material Wa is as main running control.

So, according to the press 1 that adopts die cushion 10 of the present invention, in each die buffer unit by the 1st unit 11～the 4th unit 14, with each material (workpiece) is manipulating object, or make up a plurality of die buffers unit, with general material (workpiece) is manipulating object, can be on 1 press 1 the different a plurality of goods of manufacturing dimension.

In addition, according to the die cushion 10 of above-mentioned formation since can be on 1 press the different various products of manufacturing dimension, and then also can realize making the small-scaleization as much as possible of the production equipment of many kinds goods.

; shown in Figure 10 A; under the situation of making 4 more different C step Pc1 of mutual shape (specification), Pc2, Pc3, Pc4; with counterdie L1～L4 shown in Figure 6, holding pad H1～H4 and patrix U1～U4; be defined as correspondingly, each mould supplied with material Wc, Wc, Wc, the Wc of C step Pc1～Pc4 with C step Pc1～Pc4.

The operation control section 20 of die cushion 10, based on job status from guidance panel 26 inputs, by the 1st control part 21～the 4th control part 24, utilize the desired die-cushion (with reference to Figure 17) corresponding independently of each other, running control the 1st unit 11～the 4th unit 14 with the specification of C step Pc.

That is, the 1st unit 11～the 4th unit 14 can be based on the wrinkle compaction pressure corresponding with the specification of C step Pc1～Pc4, stroke, work timing etc., running control independently respectively.

Especially, consider that work plates such as utilizing vacuum cup send the taking-up of the goods of device, no matter the difference of the stroke that is produced by the degree of depth of deep-draw etc. how, each holding pad H1～H4, reach mode simultaneously to reach the rise timing of end of corresponding with shape of products desired lift, control the rate of climb of the 1st unit 11～the 4th unit 14.

So, in adopting the press 1 of die cushion 10 of the present invention, can be in same operation, be fabricated to simultaneously with a kind of (B step, C step), the more different a plurality of goods of shape (specification).

In addition, shown in Figure 10 B, making 2 C step Pc, Pc, under the situation of 1 B step Pb, as shown in Figure 6, counterdie L1, L2, holding pad H1, H2 and patrix U1, U2 are set, counterdie, holding pad H12 and patrix U12 are set simultaneously as shown in Figure 8, between counterdie L1, L2 and patrix U1, U2, supply with material Wc, the Wc of C step Pc, between counterdie L12 and patrix U12, supply with the material Wb of B step Pb simultaneously.

The operation control section 20 of die cushion 10, based on job status from guidance panel 26 inputs, by the 1st control part 21 and the 2nd control part 22, utilize the desired die-cushion (with reference to Figure 17) corresponding independently of each other with the specification of C step Pc, running control the 1st unit 11 and the 2nd unit 12, synchronously utilize the desired die-cushion (with reference to Figure 17) corresponding with the specification of B step Pb simultaneously mutually, running control is used to make the 3rd unit 13 and the 4th unit 14 of B step Pb.

In addition, operation control section 20, consider that work plates such as utilizing vacuum cup send the taking-up of the goods of device, no matter the difference of the stroke that is produced by the degree of depth of deep-draw etc. how, each holding pad H1～H4, reach mode simultaneously to reach the rise timing of end of corresponding with shape of products desired lift, control the rate of climb of the 1st unit 11～the 4th unit 14.

So, in the press 1 that adopts die cushion 10 of the present invention, can be in same operation, the big identical various products (B step, C step) of while manufacturing dimension.

In addition, shown in Figure 11 A, under the situation of making 1 B step Pb, as shown in Figure 8, counterdie L11, holding pad H11 and patrix U11 are set, between counterdie L11 and patrix U11, supply with the material Wb of B step.

The operation control section 20 of die cushion 10, based on job status from the guidance panel input, synchronously utilize the desired die-cushion (with reference to Figure 17) corresponding with the specification of B step Pb simultaneously mutually, running control is used to make the 2nd unit 12 and the 3rd unit 13 of B step Pb.

In addition, shown in Figure 11 B, under the situation of making 2 C step Pc, Pc, as shown in Figure 6, counterdie L2, L3, holding pad H2, H3 and patrix U2, U3 are set, between counterdie L2, L3 and patrix U2, U3, supply with the material Wc of C step Pc.

The operation control section 20 of die cushion 10, based on job status from the guidance panel input, by the 2nd control part 22 and the 3rd control part 23, utilize the desired die-cushion (with reference to Figure 17) corresponding with the specification of C step Pc independently of each other, running control is used to make the 2nd unit 12 and the 3rd unit 13 of C step Pc.

So, in the press 1 that adopts die cushion 10 of the present invention, also can not use specific die buffer unit.In addition, also can freely set any die buffer unit of selection.In addition, certainly also can select in the mode that adds the eccentric load that takes place man-hour reducing as far as possible.

Herein, in described embodiment, utilize the control method of main/slave mode, synchronously running is controlled with a plurality of die buffers unit of general mutually material as manipulating object mutually, but as embody described main/formation of the control method of slave mode, can suitably adopt existing all formations certainly.

In addition, as the mutual method of a plurality of die buffers of running control unit synchronously, not only can adopt illustrative in an embodiment main/control method of slave mode, also can adopt existing all control methods effectively certainly.

In addition, in described embodiment, show the example that constitutes the lift drive mechanism of the die buffer unit in the die cushion by the servo fluid cylinder of oil pressure, but also can constitute the lift drive mechanism of die buffer unit by suitable driving mechanisms such as for example electrical servo motors.

Figure 12 is the ideograph of other embodiment of expression die buffer unit, and in this die buffer unit 100, cushion pad 101 via ball screw 102, binding parts 103, big belt wheel 104, belt 105 and small pulley 106, links with electrical servo motor 107.By these ball screws 102, binding parts 103, big belt wheel 104, belt 105, small pulley 106 and electrical servo motor 107, constitute lift drive mechanism 110.

In addition, each side of cushion pad 101 be provided with the pedestal (lathe bed) that is located at not shown press on the pad 1,1 of base rail sliding-contact ...

Fixedly install the nut portions 102a of ball screw 102 in the bottom of cushion pad 101, the threaded portion 102b of ball screw 102 twists and is combined among the described nut portions 102a, and the bottom of threaded portion 102b is connected and links on the parts 103.In addition, link parts 103 and be bearing in crossbeam 108 in the pedestal by bearing etc.,, big belt wheel 104 is set in the bottom of described binding parts 103.Small pulley 106 is set on the rotating shaft of electrical servo motor 107, on big belt wheel 104 and small pulley 106, hangs belt 105.

Rotation along with the rotating shaft on the electrical servo motor 107, small pulley 106, big belt wheel 104, binding parts 103 and threaded portion 102b rotatablely move, by along with described threaded portion 102b rotatablely moves, nut portions 102a is along threaded portion 102b, above-below direction is a lifting direction rectilinear motion, cushion pad 101 and together elevating movement of nut portions 102a.

In above-mentioned die buffer unit 100, constitute the motion (rotation of rotating shaft) of the electrical servo motor 107 of lift drive mechanism 110 by circuit control, can be the same with the servo fluid cylinder of oil pressure in the past the die cushion, suitably control the motion (wrinkle compaction pressure, stroke, locked position etc.) of cushion pad 101.

Figure 13 is the ideograph of other embodiment of expression die buffer unit, and in this die buffer unit 200, cushion pad 201 via ball screw 202, binding parts 203, big belt wheel 204, belt 205 and small pulley 206, links with electrical servo motor 207.By these ball screws 202, binding parts 203, big belt wheel 204, belt 205, small pulley 206 and electrical servo motor 207, constitute lift drive mechanism 210.

In addition, each side of cushion pad 201 be provided with the pedestal (lathe bed) that is located at not shown press on the pad 1,1 of base rail sliding-contact ...

Fixedly install the threaded portion 202b of ball screw 202 in the bottom of cushion pad 201, twist the nut portions 202a that closes ball screw 202 in the 202b of this threaded portion, the bottom of described nut portions 202b is connected and links on the parts 203.In addition, link parts 203, be bearing on the crossbeam 208 in the pedestal, big belt wheel 204 is set in the bottom of described binding parts 203 by bearing etc.Small pulley 206 is set on the rotating shaft of electrical servo motor 207, on big belt wheel 204 and small pulley 206, hangs belt 205.

Rotation along with the rotating shaft on the electrical servo motor 207, small pulley 206, big belt wheel 204, binding parts 203 and nut portions 202a rotatablely move, by along with described nut portions 202a rotatablely moves, threaded portion 202b is along nut portions 202a, above-below direction is a lifting direction rectilinear motion, cushion pad 101 and together elevating movement of threaded portion 202b.

In above-mentioned die buffer unit 200, also constitute the motion (rotation of rotating shaft) of the electrical servo motor 207 of lift drive mechanism 210 by circuit control, can be the same with the servo fluid cylinder of oil pressure in the past the die cushion, suitably control the motion (wrinkle compaction pressure, stroke, locked position etc.) of cushion pad 201.

Figure 14 is the ideograph of other embodiment of expression die buffer unit, in this die buffer unit 300, cushion pad 301, via plunger rod 311 and piston 312, also via ball screw 302, link parts 303, big belt wheel 304, belt 305 and small pulley 306, and link with electrical servo motor 307.By these plunger rods 311, piston 312, ball screw 302, binding parts 303, big belt wheel 304, belt 305, small pulley 306 and electrical servo motor 307 constitute lift drive mechanism 310.

Fixedly install the plunger rod 311 of column in the bottom of cushion pad 301, this plunger rod 311 by fixedly being located at the drift guiding 313 of the tubular on the crossbeam 308 in the pedestal, is supported sliding freely.Plunger rod 311 is supported on the drift guiding 313, and elevating movement, thereby drift guiding 313 is to lifting direction pilot punch bar 311 and be connected cushion pad 301 on the plunger rod 311.

Be formed on the fluid cylinder 311a that following direction has opening in the bottom of cushion pad 311,, accommodate piston 312 sliding freely in the inside of fluid cylinder 311a.Above the internal face of fluid cylinder 311a and piston 312, form hydraulic chamber 314.Stowing pressure oil in this hydraulic chamber 314.

Described hydraulic chamber 314, its axle center is identical with the axle center of plunger rod 311 and ball screw 302, and in addition, the pressure hydraulic fluid port of described hydraulic chamber 314 is connected with not shown oil hydraulic circuit, carries out giving and accepting of oil pressure between hydraulic chamber 314 and oil hydraulic circuit.Pressure oil in the hydraulic chamber 314 relaxes the impact that produces when patrix contact with workpiece, reach setting when above at oil pressure simultaneously, and by to fuel tank (not shown) discharge pressure oil, face is brought into play and prevented overladen function.

The lower end of piston 312 is overlapped on the upper end of threaded portion 302b of ball screw 302, forms the concave surface 312a of dome shape in the lower end of piston 312, forms the protuberance 302c of dome shape in the upper end with the threaded portion 302b of this concave surface 312a subtend.On the contrary, also can: form convex surface in the lower end of piston 312, form concave surface in the upper end of threaded portion 302b.

Herein, although but the such bar-like member resistant function of threaded portion 302b in the axial power of end, non resistance moment of flexure.If the upper end of threaded portion 302b is a spherical shape, the upper end of threaded portion 302b takes place under the situation of moment of flexure even suppose cushion pad 301 to tilt, also, can prevent the damage of the threaded portion 302b that eccentric load causes in advance only to the axial power of threaded portion 302b mass action.

Twist on the 302b of the threaded portion of ball screw 302 and close nut portions 302a, the bottom of this threaded portion 302b is connected and links on the parts 303.In addition, link parts 303, be bearing on the crossbeam 308 in the pedestal, big belt wheel 304 is set in the bottom of described binding parts 303 by bearing etc.Small pulley 306 is set on the rotating shaft of electrical servo motor 307, on big belt wheel 304 and small pulley 306, hangs belt 305.

Rotation along with the rotating shaft on the electrical servo motor 307, small pulley 306, big belt wheel 304, binding parts 303 and nut portions 302a rotatablely move, by along with described nut portions 302a rotatablely moves, threaded portion 302b is along nut portions 302a, above-below direction is a lifting direction rectilinear motion, cushion pad 301 and threaded portion 302b, piston 312, together elevating movement of plunger rod 311.

In above-mentioned die buffer unit 300, also constitute the motion (rotation of rotating shaft) of the electrical servo motor 307 of lift drive mechanism 310 by circuit control, can be the same with the servo fluid cylinder of oil pressure in the past the die cushion, suitably control the motion (wrinkle compaction pressure, stroke, locked position etc.) of cushion pad 301.

Figure 15 is the ideograph of other embodiment of expression die buffer unit, in this die buffer unit 400, cushion pad 401, via plunger rod 411 and piston 412, in addition via ball screw 402, binding parts 403, coupling 421 and decelerator 422, link with the rotating shaft of electrical servo motor 407,, constitute lift drive mechanism 410 by these plunger rods 411, piston 412, ball screw 402, binding parts 403, coupling 421, decelerator 422 and electrical servo motor 407.

Lower zone at described binding parts 403 is provided with electrical servo motor 407, and connection reducer 422 on the rotating shaft of this electrical servo motor 407.In addition, electrical servo motor 407 also can in establish decelerator.

In the bottom of described binding parts 403, link the output shaft of decelerators 422 via coupling 421, described ball screw 402, the output shaft that links parts 403, coupling 421, decelerator 422 be positioned at coaxial on.In addition, by the structure of decelerator, the rotating shaft of electrical servo motor 407, also with described ball screw 402 grades be positioned at coaxial on.

Herein, described die buffer unit 400, because except the configuration with respect to the electrical servo motor 407 that links parts 403 reaches from electrical servo motor 407 to the transmission mechanism of the power that links parts 403, inscape is identical with the die buffer unit 300 that illustrates previously basically, in the inscape of die buffer unit 400, for the inscape that constitutes the effect identical with die buffer unit 300, be attached to the symbol that adds 100 400 levels on the symbol identical, and omit detailed explanation with Figure 14.

In described die buffer unit 400, rotation along with the rotating shaft on the electrical servo motor 407, rotations such as gear in the decelerator 422, the output shaft of this decelerator 422, coupling 421, binding parts 403, nut portions 402a rotatablely move, by rotatablely moving along with described nut portions 402a, threaded portion 402b is along nut portions 402a, and above-below direction is a lifting direction rectilinear motion, cushion pad 401 and threaded portion 402b, piston 412, together elevating movement of plunger rod 411.

In above-mentioned die buffer unit 400, also constitute the motion (rotation of rotating shaft) of the electrical servo motor 407 of lift drive mechanism 410 by circuit control, can be the same with the servo fluid cylinder of oil pressure in the past the die cushion, suitably control the motion (wrinkle compaction pressure, stroke, locked position etc.) of cushion pad 401.

In addition, in the above-described embodiments, illustration use example of the present invention in the press in constructing the production equipment of automobile, but die cushion of the present invention, not only can be used for constructing the press of the production equipment of automobile, also can be used in the press of constructing in the production equipment of producing various goods.

Claims (3)

1. the die cushion of a press is characterized in that:

In lathe bed, be arranged side by side a plurality of die buffers unit, the lift drive mechanism that this die buffer unit has cushion pad and this cushion pad is moved up and down along direction with workpiece carriage direction quadrature.

2. the die cushion of press as claimed in claim 1 is characterized in that: have and can distinguish the controlling organization of the described a plurality of die buffers of running control unit independently.

3. the die cushion of press as claimed in claim 2 is characterized in that: make with general mutually workpiece as the control of synchronously turning round mutually of a plurality of described die buffer unit of manipulating object.

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