CN104014628A - Numerical control telescopic cushion with error compensation function - Google Patents
Numerical control telescopic cushion with error compensation function Download PDFInfo
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- CN104014628A CN104014628A CN201410227706.1A CN201410227706A CN104014628A CN 104014628 A CN104014628 A CN 104014628A CN 201410227706 A CN201410227706 A CN 201410227706A CN 104014628 A CN104014628 A CN 104014628A
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Abstract
The invention discloses a numerical control telescopic cushion with an error compensation function. The numerical control telescopic cushion comprises a telescopic cushion base body 12 and fluid cylinders 11 distributed on the telescopic cushion base body 12 in an array mode. The array-mode fluid cylinders are connected to a fluid source in an overall communication or partitioned communication mode. In a pressure machine, the numerical control telescopic cushion is arranged between a top rod and a top crown, and the bottom of the top rod is erected on a supporting and ejecting part for the fluid cylinders of the numerical control telescopic cushion. By controlling pressure of working media of the fluid cylinders, output force of the top rod can be accurately controlled, and therefore different magnitudes of edge pressing force is provided, and the process requirement for stamping materials which are complex in shape and can hardly be formed into a shape is met. In addition, the fluid cylinder arrays in all areas are communicated with one another and are equal in pressure, the length error of the top rod can be automatically compensated for through the change of strokes of the fluid cylinders, the rejection rate of stamping parts can be decreased, and the requirement of the pressure machine for the length error of the top rod is lowered.
Description
Technical field
The present invention relates to a kind of numerical control stretching pad with error compensation function, relate generally to the pressure-pad-force control technology in workpiece punching course.
Background technology
In order to adapt to complicated shape part and the material variation requirement for pressure-pad-force in drawing process, novel press machine adopts in a large number numerical control to stretch and pads.Numerical control stretches to pad and is arranged in press bench, by movable push rod, the power of appointment is applied on plate support.In the process stretching, push rod power output can change; The diverse location of plate support, the power of push rod output also can be according to set point change, thereby meets the requirement of drawing process to pressure-pad-force.The numerical control of current extensive use stretches and is lined with two kinds of structures, and one is pure hydraulic numerical control stretching pad, and one is servomotor stretching pad.
Pure hydraulic numerical control stretching pad adoption rate valve or servo valve carry out Position Control and power control to hydraulic cylinder, and due to High power output, control accuracy is high, and hydraulic control circuit is very complicated, and Hydrauservo System expense is very high; The Position Control of hydraulic cylinder, power control are to adopt valve-controlled cylinder system, and energy consumption is large, and efficiency is low.
Servomotor stretches pad by servomotor, hydraulic damping device and detects accordingly composition of the control system.Driven by servomotor lead screw shaft, drives screw motion, and because screw and apical cap link together, thereby driving apical cap moves up and down; Between screw and apical cap, hydraulic damping device is set, by detecting the pressure of hydraulic damping device, adjusts servomotor output, control pressure-pad-force.In this scheme, numerical control stretching mat structure is very complicated, very high to attended operation personnel technical requirement, and manufacturing cost and maintenance cost are all very high.
The problem that prior art exists is: the forcing press of prior art, and shown in figure 1 and Fig. 2, whole basis stretches and pads 3 is huge cylinders, and pad 3 tops that stretch connect apical cap 5, and push rod 2 directly contacts with forcing press apical cap 5.Due to push rod use procedure or fabrication stage generation length error, each push rod 2 is also incomplete same with contacting of forcing press apical cap 5, push rod force distribution inequality.Therefore the forcing press of prior art stretches to pad and requires very high to the error in length of push rod.In the time that push rod is different in size, short push rod for the power that plate support provides less, the pressure-pad-force that plate support provides is herein less, flows into the metal of mould many, workpiece is easily wrinkling and produce waste product.
Summary of the invention
For the problems referred to above, the present invention pads for forcing press provides a kind of numerical control with error compensation function to stretch, and adopts piston rod to stretch out or indentation, compensates the length error of push rod, and push rod strength is even.Adopt pressure-control valve simultaneously, can further control the strength of zones of different push rod, adapt to complex part processing request.There is the numerical control stretching pad of error compensation function based on the present invention, can realize any pressure-pad-force of technological requirement.
In order to achieve the above object, the invention provides a kind of numerical control stretching pad with error compensation function, comprise stretching brace body, and the fluid cylinder of described stretching brace body top array layout; The described fluid cylinder of array is connected to fluid source with entirety or the subregion mode of being interconnected; Described in each, the top of fluid cylinder is the top part that fluid promotes.Wherein, partitioned mode of the present invention, without particular/special requirement, is mainly to determine according to used forcing press.
Described fluid cylinder is hydraulic cylinder or pneumatic cylinder, and corresponding described fluid source is hydraulic pressure base station or air pressure pumping unit.In addition, described top part, according to the set-up mode difference of fluid cylinder, can be cylinder body or piston rod mechanism; In the time that piston rod is fixing, fluid enters cylinder body, promotes cylinder body, and now cylinder body is as a top part; In the time that cylinder body is fixing, fluid enters cylinder body, promotes piston rod, and now piston rod is as a top part.
In addition, the present invention has the numerical control stretching pad of error compensation function, and described fluid source disposes pumping mechanism; And each group fluid cylinder of whole fluid cylinders of overall mode of communicating or subregion mode of communicating is provided with independently fluid pressure regulator valve.Under optimal way, described fluid pressure regulator valve outgoing position arranges press detection sensor, the detection signal of described press detection sensor is sent to automatic control unit, and described automatic control unit outputs control signals to described pumping mechanism or fluid pressure regulator valve according to described detection signal.Another kind of optimal way, described fluid cylinder arranges press detection sensor or power output detecting sensor, the detection signal of described press detection sensor or power output detecting sensor is sent to automatic control unit, and described automatic control unit outputs control signals to described pumping mechanism or fluid pressure regulator valve according to described detection signal.Under normal circumstances, pressure sensor can be arranged in control valve outgoing position or fluid cylinder, because the pressure of internal fluid equates.
According to foregoing description, the present invention also provides numerical control of the present invention to stretch and has padded occupation mode and the structure in forcing press.The main execution unit of forcing press comprises push rod and apical cap; Numerical control stretching pad of the present invention is set between described push rod and apical cap.Numerical control of the present invention stretches to pad and comprises stretching brace body, and the fluid cylinder that on described stretching brace body, array is arranged; The described fluid cylinder of array is connected to fluid source with entirety or the subregion mode of being interconnected; Described in each, the top of fluid cylinder is the top part that fluid promotes.The push rod bottom of forcing press is seated on a described top part.
When use, ensure that all push rod bottoms are seated on a top part of fluid cylinder, according to the deployment scenarios of push rod, allow to exist a not situation of support top forcing press push rod of top part of fluid cylinder.In addition, fluid cylinder of the present invention can be hydraulic cylinder, can be also pneumatic cylinder.And described fluid source disposes pumping mechanism; Whole fluid cylinders of corresponding overall mode of communicating, or each group fluid cylinder of subregion mode of communicating is provided with independently fluid pressure regulator valve.
The mechanism of fluid pressure regulator valve is set, can realizes work by Artificial Control.But in order to realize automatic control, under optimal way, described fluid pressure regulator valve outgoing position arranges press detection sensor, the detection signal of described press detection sensor is sent to automatic control unit, and described automatic control unit outputs control signals to described pumping mechanism or fluid pressure regulator valve according to described detection signal.
Or, according to controlling needs, described fluid cylinder arranges press detection sensor or power output detecting sensor, the detection signal of described press detection sensor or power output detecting sensor is sent to automatic control unit, and described automatic control unit outputs control signals to described pumping mechanism or fluid pressure regulator valve according to described detection signal.
To sum up, numerical control of the present invention stretches and pads, and comprises the adjustable fluid cylinder array of pressure, stretching brace body and fluid pressure control circuit.On stretching brace body, fluid cylinder array has been installed, fluid cylinder pressure can control to adjust, and fluid cylinder array can be exported different power.The pressure of fluid cylinder array can be controlled to adjust by proportioning valve, servo valve or common pressure-regulating valve.In addition, stretching brace body is divided into 1-8 or more region, and the multiple fluid cylinders in each region are interconnected, and pressure is identical, and by same pressure-regulating valve control, each region configures a pressure-regulating valve and carries out pressure control.
When use, the pressure of fluid cylinder can remain unchanged in workpiece process, also can adjust in real time.In each region, fluid cylinder can self-movement, other fluid cylinders actions in one's respective area is not exerted an influence.The present invention stretches and pads for the numerical control of forming press, is installed on push rod and forcing press and stretches between pad.By the control of convection cell cylinder working pressure medium, can accurately control the power output of push rod, thereby different pressure-pad-forces is provided, meet the Sheet Metal Forming Technology requirement of complicated shape, difficult moulding material.In addition, because the fluid cylinder array in each region is interconnected, pressure equates, the error that the variation by fluid cylinder stroke can auto-compensation push rod length, can reduce the percent defective of stamping parts, and reduce the error in length requirement of forcing press to push rod.
The invention has the beneficial effects as follows: according to plate forming technological requirement, can carry out difference setting to the pressure-pad-force of each point, subregion control, applies best pressure-pad-force to sheet material, makes full use of the material property of sheet material, reaches best product quality; Because push rod and fluid cylinder are in contact with one another, can be by the error in length that independently moves up and down to compensate push rod of each fluid cylinder, simultaneously because fluid cylinder in each region is interconnected, pressure is identical, fluid cylinder can be exported identical pressure-pad-force, reduces to produce due to pressure-pad-force error the situation of waste product; Fluid cylinder array is due to the compressibility of fluid, and the impact can cushion patrix and contact with plate support time extends service life of mould.
Brief description of the drawings
Fig. 1 adopts the present invention to have the forcing press principle schematic of the numerical control stretching pad of error compensation function.
Fig. 2 is the decomposing schematic representation of forcing press shown in Fig. 1.
Fig. 3 is the perspective view that the present invention has the numerical control stretching pad of error compensation function.
Fig. 4 is the fluid cylinder control principle schematic diagram that the present invention has the numerical control stretching pad of error compensation function.
Wherein, 1. forcing press matrix, 2. push rod, 3. forcing press basis stretches and pads, 4. numerical control die cushion device, 5. apical cap, the fluid cylinder array of 11. numerical controls stretching pads, 12. numerical control stretching brace bodies, 14. numerical controls stretch and pad pressure-regulating valve, 21. press machine lower dies, 22. forcing press patrixes, 23. workpieces to be machined.
Detailed description of the invention
As depicted in figs. 1 and 2, numerical control stretching pad 4 of the present invention is installed between the push rod 2 and forcing press apical cap 5 of forcing press 1, the fluid cylinder 11 of numerical control stretching pad 4 directly contacts (contact-making surface that in Fig. 1, A is push rod and numerical control stretching advance expenditure top part) with push rod 2, bottom surface directly contacts (contact-making surface that in Fig. 1, B is numerical control stretching pad 4 and forcing press stretching pad 5) with forcing press apical cap 5.
As shown in Figure 3, numerical control of the present invention stretches to pad and is made up of stretching brace body 12 and fluid cylinder array 11.Fluid cylinder array 11 is installed on matrix, be divided into 1-8 or more region, multiple fluid cylinders in each region interconnect and are communicated with, pressure is accurately controlled (as shown in Figure 4) by same pressure-regulating valve 14, therefore in same region, different fluid cylinder power output is identical, and fluid cylinder can set value power output according to pressure-regulating valve.But in different regions, owing to adopting different pressure-regulating valves to carry out independent control to this region, by the control to pressure-regulating valve, the fluid pressure difference of zones of different, the power output of fluid cylinder is not identical yet.In the process of workpiece first being processed or processing, can adjust pressure-regulating valve, meet the technological requirement of different workpieces processing.
Use the forcing press of numerical control stretching pad of the present invention to pass through the adjustment of pressure-regulating valve 14, numerical control stretches and pads and can export the power of setting to push rod 2, and push rod can provide for plate support the pressure-pad-force of control system setting.Push rod 2 directly contacts with a top part for fluid cylinder 11, can compensate the error in length of push rod by independently moving up and down of each fluid cylinder, although it is different in size to reach push rod in same region, but still can export the effect of identical pressure-pad-force, the pressure-pad-force difference that reduces to cause due to push rod error produces the situation of waste product.
At this, Fig. 4 is briefly explained, the fluid source of numerical control stretching pad of the present invention 4 fluid cylinders disposes pumping mechanism; And whole fluid cylinders of overall mode of communicating, or each group fluid cylinder of subregion mode of communicating is provided with independently fluid pressure regulator valve 14.When use, can basis, at fluid pressure regulator valve outgoing position, press detection sensor is set, the detection signal of press detection sensor is sent to automatic control unit, and automatic control unit outputs control signals to pumping mechanism or fluid pressure regulator valve according to detection signal.In addition, the present invention also can select other control mode, as fluid cylinder arranges press detection sensor or power output detecting sensor, the detection signal of press detection sensor or power output detecting sensor is sent to automatic control unit, and automatic control unit outputs control signals to pumping mechanism or fluid pressure regulator valve according to detection signal.
It should be noted that, two paired fluid cylinders 11 are only shown respectively in Fig. 1, Fig. 2 and Fig. 4, and in Fig. 3, the fluid cylinder on stretching brace body 12, sets, more than two of every row's fluid cylinder in a row.That is to say that forcing press when work need to ensure that all push rod bottoms are seated on a top part of fluid cylinder, but have a not situation of support top forcing press push rod of top part of fluid cylinder, be i.e. Fig. 1,2,4 situations not corresponding with Fig. 3.
The present invention has installed fluid cylinder array on stretching brace body, fluid cylinder array is divided into 1-8 or more region, multiple fluid cylinders in same region are interconnected, pressure is identical, by same pressure-regulating valve control, but the fluid cylinder of zones of different is respectively by different pressure-control valve control.Therefore the fluid cylinder of zones of different can be exported different power, but in same region, the power output of multiple fluid cylinders is identical.The pressure of fluid cylinder array can be controlled to adjust by proportioning valve, servo valve or common pressure-regulating valve.Pressure sensor or power sensor can be set in fluid cylinder array control pressurer system, convection cell cylinder pressure or power output are measured, automatic controller sets value and the difference of measuring value of feedback by calculating, calculate output signal, output signal acts on proportioning valve, servo valve or common pressure-regulating valve to realize the closed-loop control of fluid cylinder power output.Sensor also can be set, by automatic controller or manually directly to control valve output or be adjusted to pressure set points, thereby realize the open loop control of convection cell cylinder array power output.
The above; it is only preferably detailed description of the invention of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (5)
1. one kind has the numerical control stretching pad of error compensation function, it is characterized in that, comprises stretching brace body (12), and the fluid cylinder (11) of described stretching brace body (12) top array layout; The described fluid cylinder (11) of array is connected to fluid source with entirety or the subregion mode of being interconnected; Described in each, the top of fluid cylinder is the top part that fluid promotes.
2. the numerical control according to claim 1 with error compensation function stretches and pads, and it is characterized in that, described fluid cylinder is hydraulic cylinder or pneumatic cylinder.
3. stretch and pad according to the numerical control described in claim 1 or 2 with error compensation function, it is characterized in that, described fluid source disposes pumping mechanism;
And each group fluid cylinder of whole fluid cylinders of overall mode of communicating or subregion mode of communicating is provided with independently fluid pressure regulator valve.
4. the numerical control according to claim 3 with error compensation function stretches and pads, it is characterized in that, described fluid pressure regulator valve outgoing position arranges press detection sensor, the detection signal of described press detection sensor is sent to automatic control unit, and described automatic control unit outputs control signals to described pumping mechanism or fluid pressure regulator valve according to described detection signal.
5. the numerical control according to claim 3 with error compensation function stretches and pads, it is characterized in that, described fluid cylinder arranges press detection sensor or power output detecting sensor, the detection signal of described press detection sensor or power output detecting sensor is sent to automatic control unit, and described automatic control unit outputs control signals to described pumping mechanism or fluid pressure regulator valve according to described detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410227706.1A CN104014628A (en) | 2014-05-27 | 2014-05-27 | Numerical control telescopic cushion with error compensation function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410227706.1A CN104014628A (en) | 2014-05-27 | 2014-05-27 | Numerical control telescopic cushion with error compensation function |
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| CN104014628A true CN104014628A (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410227706.1A Pending CN104014628A (en) | 2014-05-27 | 2014-05-27 | Numerical control telescopic cushion with error compensation function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475529A (en) * | 2014-12-04 | 2015-04-01 | 金丰（中国）机械工业有限公司 | Hydraulic locking device of die cushion of punching machine |
| CN105081044A (en) * | 2015-08-31 | 2015-11-25 | 西安交通大学 | Hydraulic toggle rod type stretching pad capable of achieving overall horizontal motion of dual-shaft-extension permanent magnet synchronous servo motor |
| CN106862359A (en) * | 2017-04-18 | 2017-06-20 | 苏州蓝王机床工具科技有限公司 | Forcing press stretches cushion steam pressure control system |
| CN107282767A (en) * | 2017-06-07 | 2017-10-24 | 安徽蓝华金属科技股份有限公司 | A kind of flanging mould of automobile engine turbine case |
| CN108025345A (en) * | 2015-09-23 | 2018-05-11 | 舒乐绞扭机有限责任公司 | Press-on pins for forcing press that workpiece is retrofited, for workpiece is retrofited forcing press, for the training in remodeling and adjust method, the method and component for manufacturing component of forcing press |
| CN111589930A (en) * | 2020-05-14 | 2020-08-28 | 安徽江淮汽车集团股份有限公司 | Ejector rod mechanism and stamping die |
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| JPS6457927A (en) * | 1987-08-28 | 1989-03-06 | Ishikawajima Harima Heavy Ind | Die cushioning device for press machine |
| US5701778A (en) * | 1994-03-03 | 1997-12-30 | Toyota Jidosha Kabushiki Kaisha | Press having gas cylinders of plastically deformable members for even distribution of blank-holding force on pressure member through cushion pins |
| US20030066330A1 (en) * | 2001-10-09 | 2003-04-10 | Kyoho Machine Works, Ltd. | Equalizing fluid-operated apparatus and method of assembling the apparatus |
| CN102632124A (en) * | 2012-04-11 | 2012-08-15 | 济南二机床集团有限公司 | Electro-servo stretching pad |
| CN103658291A (en) * | 2013-12-31 | 2014-03-26 | 一重集团大连设计研究院有限公司 | Upper hydraulic cushion for blanking press |
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2014
- 2014-05-27 CN CN201410227706.1A patent/CN104014628A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6457927A (en) * | 1987-08-28 | 1989-03-06 | Ishikawajima Harima Heavy Ind | Die cushioning device for press machine |
| US5701778A (en) * | 1994-03-03 | 1997-12-30 | Toyota Jidosha Kabushiki Kaisha | Press having gas cylinders of plastically deformable members for even distribution of blank-holding force on pressure member through cushion pins |
| US20030066330A1 (en) * | 2001-10-09 | 2003-04-10 | Kyoho Machine Works, Ltd. | Equalizing fluid-operated apparatus and method of assembling the apparatus |
| CN102632124A (en) * | 2012-04-11 | 2012-08-15 | 济南二机床集团有限公司 | Electro-servo stretching pad |
| CN103658291A (en) * | 2013-12-31 | 2014-03-26 | 一重集团大连设计研究院有限公司 | Upper hydraulic cushion for blanking press |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475529A (en) * | 2014-12-04 | 2015-04-01 | 金丰（中国）机械工业有限公司 | Hydraulic locking device of die cushion of punching machine |
| CN105081044A (en) * | 2015-08-31 | 2015-11-25 | 西安交通大学 | Hydraulic toggle rod type stretching pad capable of achieving overall horizontal motion of dual-shaft-extension permanent magnet synchronous servo motor |
| CN105081044B (en) * | 2015-08-31 | 2017-04-19 | 西安交通大学 | Hydraulic toggle rod type stretching pad capable of achieving overall horizontal motion of dual-shaft-extension permanent magnet synchronous servo motor |
| CN108025345A (en) * | 2015-09-23 | 2018-05-11 | 舒乐绞扭机有限责任公司 | Press-on pins for forcing press that workpiece is retrofited, for workpiece is retrofited forcing press, for the training in remodeling and adjust method, the method and component for manufacturing component of forcing press |
| CN108025345B (en) * | 2015-09-23 | 2021-06-18 | 舒乐绞扭机有限责任公司 | Press and pressure pin for modifying a workpiece, method for training and adjusting a press during modification |
| CN106862359A (en) * | 2017-04-18 | 2017-06-20 | 苏州蓝王机床工具科技有限公司 | Forcing press stretches cushion steam pressure control system |
| CN107282767A (en) * | 2017-06-07 | 2017-10-24 | 安徽蓝华金属科技股份有限公司 | A kind of flanging mould of automobile engine turbine case |
| CN111589930A (en) * | 2020-05-14 | 2020-08-28 | 安徽江淮汽车集团股份有限公司 | Ejector rod mechanism and stamping die |
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Application publication date: 20140903 |