CN111037986B - Method for monitoring state of multi-link mechanism of large mechanical press - Google Patents
Method for monitoring state of multi-link mechanism of large mechanical press Download PDFInfo
- Publication number
- CN111037986B CN111037986B CN201911384423.7A CN201911384423A CN111037986B CN 111037986 B CN111037986 B CN 111037986B CN 201911384423 A CN201911384423 A CN 201911384423A CN 111037986 B CN111037986 B CN 111037986B
- Authority
- CN
- China
- Prior art keywords
- pulse signal
- rod
- monitoring
- die
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/26—Programme control arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a state monitoring system for a plurality of connecting rods of a large-scale mechanical press, which explains signal characteristics of the plurality of connecting rods of the large-scale mechanical press after being worn, designs arrangement positions of all measuring points and a cable arrangement mode of a sensor, adopts a vibration and temperature integrated sensor to collect vibration signals of the positions of connecting rod pins, adopts a magnetic induction key phase sensor to collect the rotating speed of an output shaft, and analyzes the collected signals so as to judge the current wear loss, the lubrication state and the clearance values between an upper die and a lower die of the structure of the plurality of connecting rods of the press. Compared with the method for monitoring the action times of the plungers of the distributors at all levels, the method realizes monitoring and diagnosis of the abrasion loss of the multiple connecting rods and makes up for monitoring blind spots under the conditions of breakage and leakage of the lubricating tail end.
Description
Technical Field
The invention belongs to the technical field of monitoring of the state of a large mechanical press, and particularly relates to a monitoring method for diagnosing the state of multiple connecting rods of the large mechanical press and judging the die assembly height of a die.
Background
The large mechanical press is widely applied to the automobile manufacturing industry, is important equipment of a stamping process in four major processes (stamping, welding, coating and final assembly) of automobile manufacturing, and greatly determines the annual production capacity of automobile manufacturers in the working state. The stamping production lines belong to continuous production, each stamping production line is responsible for the stamping operation of a fixed die, and the failure of a mechanical press can cause the shutdown maintenance of the whole line, thereby causing high maintenance cost, more complicated line replacement production cost and huge shutdown loss. Therefore, the monitoring of the running state of the mechanical press is of great significance for reducing economic loss and timely finding and eliminating faults.
The large mechanical press machine usually adopts a progressive centralized lubricating system, and lubricating oil is distributed to each oil feeding part by means of sequential actions of all plungers in a distributor under the pressure action of the lubricating oil. When the pipeline is blocked or the distributor plunger is stuck, the action is stopped, so that the occurrence of oil circuit faults can be judged according to the action times recorded by the proximity switch. However, when the lubricating end pipeline leaks or breaks or the pipe joint of the final-stage distributor leaks or breaks, the normal operation of the distributor is not affected, and the monitoring by the proximity switch cannot be carried out. Meanwhile, although hoisting equipment such as a crown block and the like is arranged in the stamping workshop, the height required for hoisting the parts of the press machine is not considered in the design process, so that the multi-link mechanism of the press machine can only be dismounted by an external crane in a factory once a fault occurs, and the maintenance work is further delayed.
In summary, a method for monitoring the state of multiple connecting rods of a large mechanical press is needed to overcome the shortcomings of the existing monitoring scheme.
Disclosure of Invention
The invention aims to provide a monitoring method for a multi-link mechanism of a large mechanical press, which aims to solve the problems that the running state of the multi-link mechanism and the oil supply state of the tail end of a distributor cannot be monitored at the present stage, and no reference basis for adjusting the die closing height exists. According to the design mode of the transmission structure and the balancer of the multi-connecting-rod press, the invention determines the fault mechanism and the fault signal characteristic of the multi-connecting-rod mechanism, thereby realizing the monitoring of the operating state of the multi-connecting rods.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a method for monitoring the state of a multi-link mechanism of a large mechanical press, which comprises the following steps:
(1) carry out clearance hinge dynamics simulation to many connecting rods mechanical press pendulum rod, connecting rod and plane tripod department, obtain at the balancing force and be less than by balanced quality, include: when the weight of the slide block, the guide pillar, the connecting rod, the bearing bush and the upper die is heavy, the multi-connecting-rod structure generates reversing impact in a stamping return stroke;
(2) in the step (1), the crank angle corresponding to the reversing impact is related to the abrasion gap and the balance force, and a relation curve of the crank angle corresponding to the reversing impact, the abrasion gap and the balance force is obtained through simulation;
(3) designing a sensor measuring point and an installation mode according to the position where the reversing impact occurs;
(4) setting a key phase measuring point at the position of the cam switch for measuring the rotating speed and intercepting a complete stamping period signal;
(5) calculating to obtain an angular domain synchronous average signal according to each group of acquired vibration signals and the rotating speed, then recording crank angles of the dies in the production line in the specific stamping process, and obtaining pulse signal peak values and energy of the dies at a lower dead point through orthogonal matching;
(6) the pulse signal at the bottom dead center obtained by matching in the step (5) is generated by the contact of a limiting block in the stamping process, and a gap value of an upper die limiting block and a lower die limiting block is obtained according to the corresponding relation between the die adjusting height and the pulse signal (the gap value is the difference between the displacement of the upper die limiting block without the lower die and the displacement of the upper die limiting block with the lower die, and the gap value is negative);
(7) and according to the relation curve of the spacing block gap value and the stamping load, combining the relation curve of the pulse signal at the bottom dead center and the spacing block gap value to obtain the relation curve of the pulse signal at the bottom dead center and the stamping load. And judging the current stamping load according to the peak value and the energy of the collected signal bottom dead center pulse signal so as to guide the height adjustment of the upper die.
The invention further improves the gap hinge dynamic simulation in the step (1) by adopting a collision hinge model and performing rigid-flexible coupling dynamic simulation through ADAMS software.
The invention is further improved in that the step (1) specifically comprises the following steps: and selecting rigid-flexible coupling dynamics simulation at three positions including the joint of the connecting rod and the plane tripod, the joint of the eccentric wheel and the plane tripod and the joint of the oscillating rod and the plane tripod for the six-connecting-rod press, and selecting rigid-flexible coupling dynamics simulation at five positions including the joint of the connecting rod and the plane tripod, the joint of the eccentric wheel and the plane tripod, the joint of the upper oscillating rod and the upper pull rod, the joint of the lower oscillating rod and the lower pull rod and the joint of the lower oscillating rod and the plane tripod for the eight-connecting-rod press.
The invention is further improved in that the position of the measuring point in the step (3) is as follows: the method comprises the steps that three measuring points are selected at the joint of a connecting rod and a plane tripod, the joint of an eccentric wheel and the plane tripod and the joint of a swing rod and the plane tripod for a six-connecting-rod press, five measuring points are selected at the joint of the connecting rod and the plane tripod, the joint of the eccentric wheel and the plane tripod, the joint of an upper swing rod and an upper pull rod, the joint of a lower swing rod and a lower pull rod and the joint of the lower swing rod and the plane tripod for an eight-connecting-rod press, all the measuring points are lubricated by a distributor, but reversing impact does not exist at each measuring point.
The invention has the further improvement that a relation curve of the crank angle corresponding to the reversing impact, the abrasion gap and the balance force is obtained in the step (2) in a simulation mode, the crank angle corresponding to the reversing impact under the condition of a plurality of different abrasion gaps and balance forces is obtained by simulating the crank angle corresponding to the reversing impact and fitting by adopting a spline curve, and the method is suitable for the mechanical press under the conditions of the same structure type and different rated loads.
The invention is further improved in that the installation mode in the step (3) comprises a sensor anti-loosening measure, a sensor cable arrangement mode and a sensor cable disassembly mode in the process of disassembling and maintaining the press machine.
The invention is further improved in that when the pulse signal at the bottom dead center is matched in the step (5), the pulse signal with the crank angle of 180 degrees is found according to the angular domain signal, but not the last pulse signal in the stamping process.
The invention is further improved in that the corresponding relation between the mold adjusting height and the pulse signal in the step (6) is measured by the actual production adjustment of the production line.
The invention is further improved in that the guiding upper die height adjustment in the step (6) is to give a reference value of a clearance value of the upper and lower die limiting blocks and a current pulse signal acceleration peak value, and a production line die set engineer adjusts the height according to the actual die repairing condition.
Compared with the prior art, the invention has the following beneficial effects:
at present, the work of a distributor outside a monitoring box body of a large mechanical press mainly depends on a proximity switch to record the action times, for the distributor inside an upper beam box body, a certain oil delivery pipe of a main distributor (namely a distributor for supplying lubricating oil to all secondary distributors inside the box body) in the box body is discharged out of the box body, and then a small distributor is connected to record the action times. Thus, the centralized lubrication system can monitor the action times of all distributors outside the box body and the 'main distributors' inside the box body, but the oil supply condition of the lubrication tail end (except for blockage) does not affect the normal work of any one stage of distributor, so the monitoring method has defects. Meanwhile, at the present stage, a monitoring method for a multi-link mechanism in an upper beam box body of a large mechanical press is not provided, but many automobile manufacturing users in the industry have too many link faults, so that the loss is large. The invention supplements the monitoring blind spot of the large mechanical press.
Furthermore, the monitoring method can also monitor the meshing state of two-stage gears in the upper cross beam box body and the state of bearings on two-stage shafts (an input shaft and an intermediate shaft). The device can be fused with the existing upper box body motor and bearing monitoring system, so that the redundancy of measuring points is reduced, and the maintenance difficulty of mechanical press transmission equipment is reduced.
Drawings
FIG. 1 is a schematic illustration of a multi-link monitoring method;
FIG. 2 is a schematic illustration of a multi-link monitoring system;
FIG. 3 shows the arrangement positions of keys to measuring points in the monitoring device. Wherein, 1 is an encoder, 2 is a gear box, 3 is a mechanical cam, 4 is a transmission gear, 5 is an output shaft gear, and 6 is a key phase sensor mounting position (at a coupling of the output shaft of the gear box and the mechanical cam shaft);
fig. 4 shows the arrangement position of the vibration temperature integrated sensor in the monitoring device (taking a six-bar press as an example). The device comprises a plurality of connecting rods, a plurality of eccentric wheels, a plurality of swing rods, a plurality of connecting rods, a plurality of eccentric wheels, a plurality of swing rods and a plurality of plane tripod connecting pins, wherein (a) is the distribution position of the measuring points on the plurality of connecting rods, (b) is the specific installation position of the measuring points, 7 is the connecting pin position of the connecting rods and the plane tripod, 8 is the connecting pin position of the eccentric wheels and the plane tripod, and 9 is the connecting pin position of the swing rods and the plane tripod;
fig. 5 is a sensor cable arrangement in a monitoring device. Wherein 10 is the transverse wall of the upper beam of the press, 11 is a sensor cable, 12 is a lubricating pipeline, 13 is a progressive distributor, and 14 is a vibration temperature integrated sensor.
Detailed Description
In order to make the purpose, technical effect and technical solution of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Referring to fig. 1, the monitoring method of the invention obtains the positions of the set measuring points and the failure mechanism of the connecting rod pin after abrasion by dynamic simulation, obtains the balance force setting mode of the press and the crank angle corresponding to each punching process by experiments, and obtains the running state of the connecting rod mechanism of the press by combining the measured signals and processing signals, and comprises the following steps: link pin wear amount, lubrication state (pulsation oil pressure and frequency), and upper and lower die clearance values.
Referring to fig. 2, the monitoring method of the invention depends on the device comprising a vibration and temperature integrated sensor, a magnetic induction type key direction sensor, a VibSCAN Pro signal acquisition unit, a single board computer and a 4g wireless transmission module, wherein the vibration and temperature integrated sensor acquires vibration signals of a connecting rod in an upper cross beam box body of the multi-connecting rod mechanical press, the magnetic induction type key direction sensor acquires the rotating speed of an output shaft in the upper cross beam box body, the ScanPro signal acquisition unit is used for amplifying and filtering the vibration signals, and the single board computer is used as a carrier for locally storing vibration and temperature signals and remotely accessing the single board computer by the 4g wireless transmission module. An experienced person can judge the current equipment state by the iCMS system, and a general user can automatically recognize the current wear amount and lubrication state with reference to the MATLAB program.
The state monitoring method of the multi-link mechanism of the large mechanical press comprises the following working processes:
and 6, identifying the current abrasion loss and the lubrication state of the connecting rod pin of the press according to the die stamping process obtained in the step 3 and the vibration signal obtained in the step 5.
And 7, obtaining the pulse signal peak value and energy of each die at the lower dead point through orthogonal matching, and giving a current upper die clearance value reference value and a current lower die clearance value reference value.
Further, in step 1, the purpose of the following work is to determine the system station arrangement of the present invention:
(1) the modeling of the multi-connecting rod needs to comprise an output shaft, an eccentric wheel, a plane tripod, a connecting rod, a swing rod, a slide block (the weight of an upper die needs to be calculated by the slide block) and a bearing bush and a pin shaft at each hinge; the rod piece and the pin shaft are made of 45# steel, and the bearing bush is made of tin bronze or other composite materials such as T10, 10-1, 663 and the like according to manufacturers; when punching, the workpiece is pressed by punching load and balance force, and the two stress positions are the bottoms of the sliding blocks. Wherein the stamping load is subjected to the maximum load 13mm before the lower dead point, and the nitrogen cylinder is pre-pressed by 10% of load 130mm-13mm before the lower dead point; and calculating the change of the balancing force according to the constant total amount of the gas in the balancer and the gas tank.
(2) The clearance comparison dynamics simulation is carried out on the swing rod and the plane tripod of the six-connecting-rod mechanical press, and when the whole course of the balancing force is smaller than the gravity of the balanced mass (the mass of a slide block, a guide pillar, a connecting rod, a bearing bush, an upper die and the like), the multi-connecting-rod structure can generate reversing impact.
(3) The measuring point of the multi-link mechanism of the mechanical press is determined: the method comprises the steps of selecting three measuring points at the joint of a connecting rod and a plane tripod, the joint of an eccentric wheel and the plane tripod and the joint of a swing rod and the plane tripod for a six-connecting-rod press, and selecting five measuring points at the joint of the connecting rod and the plane tripod, the joint of the eccentric wheel and the plane tripod, the joint of an upper swing rod and an upper pull rod, the joint of a lower swing rod and a lower pull rod and the joint of the lower swing rod and the plane tripod for an eight-connecting-rod press. Referring to fig. 3, a cam switch is used to monitor the position of the press ram, which rotates at the same speed as the output shaft inside the upper beam box and thus can be used for key-direction activation. The key direction sensor is arranged at the position of a coupler between a cam switch mechanical gear box and a mechanical cam, and the coupler is usually a tooth-shaped coupler and needs to be axially fixed. Therefore, the split pin for axial fixing is replaced by the bolt, and two purposes of axial fixing and key direction triggering can be simultaneously met. Referring to fig. 4, the installation positions of the vibration and temperature integrated sensor are as follows: 7 is the connection part of the plane tripod and the connecting rod and is arranged on the plane tripod; the 8 is the junction of the plane tripod and the eccentric wheel and is arranged on the plane tripod; and 9 is the joint of the plane tripod and the swing rod and is arranged on the plane tripod. Referring to fig. 5, the "main distributor" inside the upper beam box is mounted on a planar tripod, and its oil supply line is fixed on the inner box wall and connected to the oil inlet by a rubber hose. Sensor cables of three measuring points (joints of the connecting rods and the sliding blocks are lubricated by oil immersion, and the measuring points cannot be arranged or are not required) can be connected to the inner box wall along a lubricating pipeline, and extend out of the box body through the middle shaft bearing seat peeping cover. Meanwhile, in order to ensure that the sensor installation does not influence the disassembly and maintenance of equipment, the sensor cable is connected with the aviation plug at a proper position, the aviation plug is disconnected during disassembly and assembly, and the sensor cable is re-assembled according to the cable tag during re-assembly.
Further, in the step 2, a collision hinge model is adopted to simulate the position of each connecting rod pin of the multi-connecting-rod mechanism, crank angles corresponding to reversing impact under the action of different gaps and different balance forces are simulated, and a relation curve of the crank angles corresponding to the reversing impact, the abrasion gaps and the balance forces is fitted through a spline curve.
Further, in step 4, the weight of the upper die of all dies in charge of the press machine needs to be recorded on the production line, and the crank angle corresponding to each stamping process is measured through a jog experiment. The specific method comprises the following steps: and (5) inching to an angle corresponding to the signal peak value, observing the contact part of the current die, and correcting to finally obtain a crank angle corresponding to each stamping process of the set of die.
Further, in step 6, the crank angle is related to the wear clearance and the balance force, the die corresponding to the signal is judged, the occurrence time of each stamping process is found out according to the pulse signal obtained by orthogonal matching, the pulse signal is rotated into an angle domain according to the key phase signal, the Euclidean distance is obtained according to the crank angle corresponding to each stamping process, the stamping process of the most similar die is found out, and the actual die corresponding to the current signal is judged. According to the recorded weight of the upper die, a relation curve of the abrasion gap under the action of the corresponding weight of the upper die (namely the corresponding balance force) and the crank angle corresponding to the reversing impact is found in the relation curve of the crank angle corresponding to the reversing impact, the abrasion gap and the crank angle corresponding to the reversing impact, and an abrasion reference value is given according to the crank angle corresponding to the reversing impact in the current vibration signal.
Further, in step 6, the link lubrication status includes oil supply frequency and oil pressure. Intercepting a non-stamping section signal, obtaining a natural frequency section of a lubricating oil film through wavelet packet decomposition, and then adopting a pulse oil pressure oil supply signal at the tail end of an orthogonal matching distributor, wherein the interval of the pulse oil pressure signal is a pulse oil pressure period. And then normalizing the peak value of the pulse oil pressure signal according to the stress of the connecting rod pin obtained by simulation to obtain a pulse oil pressure signal for eliminating the load influence, and judging the current pulse oil pressure according to the peak value and the energy of the signal.
Further, in step 7, a pulse signal at the bottom dead center is obtained through orthogonal matching in the angular domain, and the signal is generated by the contact of the upper die limiting block and the lower die limiting block. Vibration signals under different upper and lower die clearance conditions are obtained through actual measurement on a production line, and a relationship curve of the upper and lower die clearance values and the pulse signal peak values and energy is obtained by combining the pulse signal peak values and energy which are orthogonally matched. And then, judging the current reference value of the clearance value between the upper die and the lower die according to the average pulse signal peak value and the energy of the same die in the same day.
In another embodiment of the present invention, a detailed process of the method for monitoring the state of the multi-link mechanism of the large mechanical press is specifically described, which includes the following steps:
(1) carry out clearance hinge dynamics simulation to many connecting rods mechanical press pendulum rod, connecting rod and plane tripod department, obtain at the balancing force and be less than by balanced quality, include: when the weight of the slide block, the guide pillar, the connecting rod, the bearing bush and the upper die is heavy, the multi-connecting-rod structure generates reversing impact in a stamping return stroke; and the clearance hinge dynamics simulation adopts a collision hinge model, and rigid-flexible coupling dynamics simulation is carried out through ADAMS software.
(2) In the step (1), the crank angle corresponding to the reversing impact is related to the abrasion gap and the balance force, and a relation curve of the crank angle corresponding to the reversing impact, the abrasion gap and the balance force is obtained through simulation; the relation curve of the crank angle corresponding to the reversing impact, the abrasion gap and the balance force is obtained by simulating the crank angle corresponding to the reversing impact under the condition of a plurality of different abrasion gaps and balance forces and fitting by adopting a spline curve.
(3) Designing a sensor measuring point and an installation mode according to the position where the reversing impact occurs; wherein the location of the position measurement is: the method comprises the steps that three measuring points are selected at the joint of a connecting rod and a plane tripod, the joint of an eccentric wheel and the plane tripod and the joint of a swing rod and the plane tripod for a six-connecting-rod press, five measuring points are selected at the joint of the connecting rod and the plane tripod, the joint of the eccentric wheel and the plane tripod, the joint of an upper swing rod and an upper pull rod, the joint of a lower swing rod and a lower pull rod and the joint of the lower swing rod and the plane tripod for an eight-connecting-rod press, all the measuring points are lubricated by a distributor, but reversing impact does not exist at each measuring point.
(4) And a key phase measuring point is arranged at the position of the cam switch and used for measuring the rotating speed and intercepting a complete stamping period signal.
(5) Calculating to obtain an angular domain synchronous average signal according to each group of acquired vibration signals and the rotating speed, then recording crank angles of the dies in the production line in the specific stamping process, and obtaining pulse signal peak values and energy of the dies at a lower dead point through orthogonal matching; when the pulse signals at the bottom dead center are matched, the pulse signals with the crank angle of 180 degrees need to be found according to the angle domain signals, and the last pulse signal in the stamping process is not found.
(6) The pulse signal at the bottom dead center obtained by matching in the step (5) is generated by the contact of a limiting block in the stamping process, and a gap value of an upper die limiting block and a lower die limiting block is obtained according to the corresponding relation between the die adjusting height and the pulse signal, wherein the gap value is the difference between the displacement of the upper die limiting block without a lower die and the displacement of the upper die limiting block with a lower die, and the gap value is negative; and the corresponding relation between the mold adjusting height and the pulse signal is measured by the actual production adjustment of the production line. And the guiding upper die height adjustment is to give a reference value of a clearance value of the upper and lower die limiting blocks and a current pulse signal acceleration peak value, and a production line die set engineer adjusts the height according to the actual die repairing condition.
(7) And according to the relation curve of the spacing block gap value and the stamping load, combining the relation curve of the pulse signal at the bottom dead center and the spacing block gap value to obtain the relation curve of the pulse signal at the bottom dead center and the stamping load, and judging the current stamping load according to the peak value and the energy of the collected signal bottom dead center pulse signal to guide the height adjustment of the upper die.
Claims (7)
1. The method for monitoring the state of the multi-link mechanism of the large mechanical press is characterized by comprising the following steps of:
(1) carry out clearance hinge dynamics simulation to many connecting rods mechanical press pendulum rod, connecting rod and plane tripod department, obtain at the balancing force and be less than by balanced quality, include: when the weight of the slide block, the guide pillar, the connecting rod, the bearing bush and the upper die is heavy, the multi-connecting-rod structure generates reversing impact in a stamping return stroke;
(2) in the step (1), the crank angle corresponding to the reversing impact is related to the abrasion gap and the balance force, and a relation curve of the crank angle corresponding to the reversing impact, the abrasion gap and the balance force is obtained through simulation;
(3) designing a sensor measuring point and an installation mode according to the position where the reversing impact occurs;
(4) setting a key phase measuring point at the position of the cam switch for measuring the rotating speed and intercepting a complete stamping period signal;
(5) calculating to obtain an angular domain synchronous average signal according to each group of acquired vibration signals and the rotating speed, then recording crank angles of the dies in the production line in the specific stamping process, and obtaining pulse signal peak values and energy of the dies at a lower dead point through orthogonal matching;
(6) the pulse signal at the bottom dead center obtained by matching in the step (5) is generated by the contact of a limiting block in the stamping process, and a gap value of an upper die limiting block and a lower die limiting block is obtained according to the corresponding relation between the die adjusting height and the pulse signal, wherein the gap value is the difference between the displacement of the upper die limiting block without a lower die and the displacement of the upper die limiting block with a lower die, and the gap value is negative;
(7) and according to the relation curve of the spacing block gap value and the stamping load, combining the relation curve of the pulse signal at the bottom dead center and the spacing block gap value to obtain the relation curve of the pulse signal at the bottom dead center and the stamping load, and judging the current stamping load according to the peak value and the energy of the collected signal bottom dead center pulse signal to guide the height adjustment of the upper die.
2. The method for monitoring the state of the multi-link mechanism of the large-scale mechanical press according to claim 1, wherein the gap hinge dynamics simulation in the step (1) adopts a collision hinge model, and rigid-flexible coupling dynamics simulation is performed through ADAMS software.
3. The method for monitoring the state of the multi-link mechanism of the large-scale mechanical press according to claim 1, wherein the relation curve of the crank angle corresponding to the reversing impact, the abrasion gap and the balance force in the step (2) is obtained by simulating the crank angle corresponding to the reversing impact under the conditions of a plurality of different abrasion gaps and balance forces and fitting by adopting a spline curve.
4. The method for monitoring the state of the multi-link mechanism of the large-scale mechanical press according to claim 1, wherein the measuring points in the step (3) are as follows: the method comprises the steps that three measuring points are selected at the joint of a connecting rod and a plane tripod, the joint of an eccentric wheel and the plane tripod and the joint of a swing rod and the plane tripod for a six-connecting-rod press, five measuring points are selected at the joint of the connecting rod and the plane tripod, the joint of the eccentric wheel and the plane tripod, the joint of an upper swing rod and an upper pull rod, the joint of a lower swing rod and a lower pull rod and the joint of the lower swing rod and the plane tripod for an eight-connecting-rod press, all the measuring points are lubricated by a distributor, but reversing impact does not exist at each measuring point.
5. The method for monitoring the state of the multi-link mechanism of the large mechanical press according to claim 1, wherein in the step (5), when the pulse signal at the bottom dead center is matched, a pulse signal with a crank angle of 180 ° is found according to the angular domain signal, instead of the last pulse signal in the stamping process.
6. The method for monitoring the state of the multi-link mechanism of the large-scale mechanical press according to claim 1, wherein the corresponding relation between the die adjustment height and the pulse signal in the step (6) is measured by actual production adjustment of a production line.
7. The method for monitoring the state of the multi-link mechanism of the large-scale mechanical press according to claim 1, wherein in the step (6), the upper die height is guided to be adjusted to give a reference value of a clearance value of the upper and lower die limiting blocks and a current acceleration peak value of a pulse signal, and the adjustment is carried out by a production line die set engineer according to an actual die repairing condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384423.7A CN111037986B (en) | 2019-12-28 | 2019-12-28 | Method for monitoring state of multi-link mechanism of large mechanical press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384423.7A CN111037986B (en) | 2019-12-28 | 2019-12-28 | Method for monitoring state of multi-link mechanism of large mechanical press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111037986A CN111037986A (en) | 2020-04-21 |
| CN111037986B true CN111037986B (en) | 2022-02-11 |
Family
ID=70240736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911384423.7A Active CN111037986B (en) | 2019-12-28 | 2019-12-28 | Method for monitoring state of multi-link mechanism of large mechanical press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111037986B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1454771A (en) * | 2002-05-01 | 2003-11-12 | 村田机械株式会社 | Motor-driven lever type press |
| JP2006225042A (en) * | 2005-02-14 | 2006-08-31 | Uhlmann Pac-Systeme Gmbh & Co Kg | Processing station |
| CN102152493A (en) * | 2009-12-04 | 2011-08-17 | 株式会社日立制作所 | Controlling device for servo press, controlling method for the same and the servo press |
| CN103057142A (en) * | 2012-10-18 | 2013-04-24 | 江苏省（扬州）数控机床研究院 | Double-crank driving double-point servo press |
| CN103419396A (en) * | 2013-06-26 | 2013-12-04 | 扬州锻压机床股份有限公司 | Top dead center height adjustment device |
| CN208529799U (en) * | 2018-07-17 | 2019-02-22 | 张广藩 | A kind of short stroke press machine |
| CN110142997A (en) * | 2019-05-14 | 2019-08-20 | 南京农业大学 | A kind of multi-connecting rod servo press machine motion control method and system |
-
2019
- 2019-12-28 CN CN201911384423.7A patent/CN111037986B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1454771A (en) * | 2002-05-01 | 2003-11-12 | 村田机械株式会社 | Motor-driven lever type press |
| JP2006225042A (en) * | 2005-02-14 | 2006-08-31 | Uhlmann Pac-Systeme Gmbh & Co Kg | Processing station |
| CN102152493A (en) * | 2009-12-04 | 2011-08-17 | 株式会社日立制作所 | Controlling device for servo press, controlling method for the same and the servo press |
| CN103057142A (en) * | 2012-10-18 | 2013-04-24 | 江苏省（扬州）数控机床研究院 | Double-crank driving double-point servo press |
| CN103419396A (en) * | 2013-06-26 | 2013-12-04 | 扬州锻压机床股份有限公司 | Top dead center height adjustment device |
| CN208529799U (en) * | 2018-07-17 | 2019-02-22 | 张广藩 | A kind of short stroke press machine |
| CN110142997A (en) * | 2019-05-14 | 2019-08-20 | 南京农业大学 | A kind of multi-connecting rod servo press machine motion control method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111037986A (en) | 2020-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100587444C (en) | Wind-powered turntable bearing combination property bench | |
| CN201293714Y (en) | Combination property experimental bench for wind-powered swivel plate bearings | |
| CN201843901U (en) | Bearing clearance adjusting device for balance shaft of heavy-duty truck | |
| CN207161537U (en) | A kind of pivoting support bearing of radially installed | |
| CN111037986B (en) | Method for monitoring state of multi-link mechanism of large mechanical press | |
| Spiewak et al. | Predictive monitoring and control of the cold extrusion process | |
| CN109540518B (en) | Petrochemical unit bearing fault diagnosis and residual life prediction device and control circuit thereof | |
| CN111037987B (en) | State monitoring signal processing method for multi-link mechanism of large mechanical press | |
| CN110595763B (en) | Vibration test device for single-input double-output transmission main shaft system | |
| CN108787755B (en) | A kind of on-bne repair method of seamless steel pipe cold-rolling mill feeding adjustment device | |
| CN107977481B (en) | Reliability analysis method for transmission system of robot harmonic speed reducer test bed | |
| CN205483563U (en) | Single -point supports joint bearing performance test machine | |
| CN112629860B (en) | Testing machine for detecting fretting wear of automobile hub bearing and detection method thereof | |
| CN114486251A (en) | Bearing test bed and bearing test method thereof | |
| CN210293296U (en) | But electronic screw press based on thing networking remote monitoring | |
| CN209164567U (en) | A kind of weighing belt special reduction gear | |
| CN216741951U (en) | Real-time early warning system for working parameters of whole fracturing pump | |
| CN215865805U (en) | Oscillating type multi-station precision speed reducer fatigue life testing device | |
| CN204992908U (en) | Hysteresis machine | |
| CN206502764U (en) | A kind of new forging rolling ring assembling form suitable for experienced bulging equipment | |
| CN105527103B (en) | A kind of single-point support oscillating bearing performance aircraft | |
| CN113176150B (en) | Squirrel cage deformation test device and method | |
| CN212110572U (en) | Gear variable tooth backlash motion test bed | |
| CN117181881B (en) | Intelligent equipment of high-speed precise punching machine and control method thereof | |
| CN216812779U (en) | Input shaft structure of ring rolling mill reducer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |