CN1309499C - Die cushion device - Google Patents
Die cushion device Download PDFInfo
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- CN1309499C CN1309499C CNB2005100746893A CN200510074689A CN1309499C CN 1309499 C CN1309499 C CN 1309499C CN B2005100746893 A CNB2005100746893 A CN B2005100746893A CN 200510074689 A CN200510074689 A CN 200510074689A CN 1309499 C CN1309499 C CN 1309499C
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Abstract
The invention provides a die cushion device, wherein a cylinder is formed at the lower part of a cushion pad, and a piston connected with the upper end of a push rod is accommodated in the cylinder in a freely sliding way. The push rod is connected with a rotating shaft of the servo motor. A hydraulic chamber is formed by the inner wall surface of the cylinder and the wall surface of the piston. The axis of the hydraulic chamber is the same as the axis of the ram. The hydraulic chamber is filled with pressure oil for impact relaxation. The pressure oil filled in the hydraulic chamber absorbs the force instantaneously acting on the cushion pad. With such a configuration, the impact generated in the press machine can be alleviated.
Description
Technical field
The present invention relates to while applying the die cushion that upwards active force lifting drives cushion pad, be specifically related to relax the die cushion of the impact of press generation.
Background technology
Wrinkling in order to prevent in deep-draw processing, die cushion (below, abbreviate die-cushion as) is being set on the press.Die-cushion in the past adopts oil pressure or air to press, and lifting drives cushion pad and produces buffering and presses.In order to improve the deep drawability of press, prevent the disrumpent feelings or distortion of workpiece, need the buffering of high accuracy control die-cushion to press, the buffering when especially needing high accuracy control cushion pad to descend running is pressed.
The die-cushion that only utilizes air to press when cushion pad is worked, can not high accuracy control buffering be pressed.Utilize the die-cushion of oil pressure, when cushion pad is worked, can press by control oil pressure high accuracy control buffering.But problem is the complex structure of hydraulic machine, needs strict maintenance care in addition.For this reason, in recent years, have simple in structure and do not need the die-cushion of electrical servo motor of strict maintenance care noticeable.
When pressure processing, if fall slide block, patrix contacts with workpiece, just forms the state that heavy weight slide block and cushion pad collide, and owing to the moment load big to the cushion pad effect, therefore press is produced big bump.
Figure 11 was illustrated in the past to act on the load of cushion pad and the diagram of time relation in the device.Herein, after being illustrated in patrix and workpiece contacting, the load variations that it is later.Draw according to Figure 11,, will produce the overbump that surpasses general value far away if patrix contacts with workpiece.
Impact in order to relax so, aspect control, synchronously make the cushion pad descending motion with the descending motion of slide block,, the what is called preparation of cushion pad descending motion is quickened in the mode that the relative velocity with respect to the patrix (slide block) of workpiece side (cushion pad) slows down.
If continue to produce big impact, the rate of wear that metal pattern will take place is accelerated and the problem of cost rising.If impact in addition greatly, the impulsive sound that take place this moment will become greatly, noise problem also occurs.For fear of the problems referred to above, require to reduce to impact as far as possible.For this reason, not only aspect control, the configuration aspects that also is desirably in die-cushion is worked hard.
Summary of the invention
The present invention proposes in view of the above fact, and its purpose is to provide a kind of die-cushion with structure of the impact that can relax the press generation.
First invention, it is a kind of die cushion, it has cushion pad, while applying power that upwards active force lifting drives the servomotor of cushion pad and transmit from servomotor to cushion pad also simultaneously from the supporting mechanism of below support cushions, it is characterized in that:
Have the hydraulic pressure chamber that is used for filling liquid between cushion pad and supporting mechanism, and this hydraulic pressure chamber is positioned on the axle center of supporting mechanism.
Cushion pad is supported from the below by push rod (supporting mechanism).This push rod and servomotor link.By ball screw etc. the action that the spinning movement of the rotating shaft of servomotor is transformed into the lifting direction is passed to push rod again.So, servomotor applies active force upwards to cushion pad, and lifting simultaneously drives cushion pad.
Form cylinder in the bottom of cushion pad, accommodate piston on the upper end that is attached at push rod freely in the slides within of cylinder.Form hydraulic pressure chamber with the internal face of cylinder and the wall of piston.The axle center of this hydraulic pressure chamber is identical with the axle center of push rod.As impacting the liquid that relaxes usefulness, stuffing pressure oil in hydraulic pressure chamber.
The pressure oil that is filled in the hydraulic pressure chamber absorbs momentary action in the power of cushion pad.Thus, when patrix contacts with workpiece, can relax the load of cushion pad from the moment that slide block is accepted.So, can relax the impact that takes place on the press.
The 2nd invention is characterized in that: also have output mechanism, be used for reaching regulation at described liquid and press when above, discharge described liquid from described hydraulic pressure chamber as described in the 1st invention.
One side's of the pressure oil gateway of hydraulic pressure chamber and control valve (output mechanism) gateway is communicated with.The opposing party's of control valve gateway is communicated with fuel tank.In more than oil pressure reaches the regulation pressure, control valve is opened, to fuel tank discharge pressure oil.So press stops.
The 3rd invention is characterized in that also having: the pressure sensor of measuring the pressure of described liquid as described in inventing as the 1st; The measured value of adopts pressure sensor is controlled the controlling organization of the running of described servomotor.
Oil pressure with the determination of pressure sensor hydraulic pressure chamber.The measured value of pressure sensor is exported to pad control part (controlling organization).The buffering that sets in advance cushion pad on the pad control part is pressed.The pad control part adopts the buffering of this setting to press and the measured value of the pressure sensor of input the running of FEEDBACK CONTROL servomotor.
According to the 1st invention,, therefore can relax the impact that takes place at press because momentary action is absorbed, relaxes by pressure oil in the load of cushion pad.Thereby can reduce the wearing and tearing of metal die, can suppress cost and rise.In addition, can reduce impulsive sound, solve noise problem.
According to the 2nd invention, press when above owing to reach regulation at oil pressure, from hydraulic pressure chamber discharge pressure oil, press stops, so can prevent the damage of the die-cushion that overload causes.
According to the 3rd invention, owing to adopt the oil pressure of the load of accepting cushion pad, carry out pressure feedback control, press so can control the buffering of cushion pad accurately.Therefore can improve the processability of forcing press.
Description of drawings
Fig. 1 is the ideograph of the formation of expression press.
Fig. 2 is the ideograph according to the die-cushion of the 1st embodiment.
Fig. 3 is the vertical view according to the die-cushion of the 1st embodiment.
Fig. 4 represents to act in the present embodiment the load of cushion pad and the diagram of time relation.
Fig. 5 is the ideograph according to the die-cushion of the 2nd embodiment.
Fig. 6 is the oil pressure line map according to the 2nd embodiment.
Fig. 7 is the oil pressure line map according to the another way of the 2nd embodiment.
Fig. 8 is the oil pressure line map according to the another way of the 2nd embodiment.
Fig. 9 is the control calcspar of the FEEDBACK CONTROL of carrying out according to the 2nd embodiment.
Figure 10 is the diagram of the running of expression slide block and die-cushion.
Figure 11 was illustrated in the past to act on the load of cushion pad and the diagram of time relation in the device.
The specific embodiment
Below, with reference to the description of drawings embodiments of the present invention.
Fig. 1 is the ideograph of the formation of expression press.
On press, subtend ground is provided with the backing plate 8 that is positioned at upper slide block 2 and is positioned at the bottom mutually.Slide block 2 is accepted power from the slide block driving mechanism 1 of top and is carried out elevating movement.Patrix 3a is installed in bottom at slide block 2.In addition, backing plate 8 is fixed on the top of lathe bed 9, on the top of backing plate 8 counterdie 3b is installed.A plurality of holes that above-below direction connects are set on backing plate 8 and counterdie 3b, in this hole, pass cushion pins 7.The upper end of cushion pins 7 is connected on the bottom of holding pad 5 of the concave portion of being located at counterdie 3b, and the lower end of cushion pins 7 is connected on the cushion pad 11 of being located at the die-cushion 10 in the lathe bed 9.Crossbeam 6 is set, with crossbeam 6 support die buffers 10 between the internal face of lathe bed 9.
[embodiment 1]
Fig. 2 is the ideograph according to the die-cushion of the 1st embodiment.Fig. 3 is the vertical view according to the die-cushion of the 1st embodiment.
In die-cushion 10, cushion pad 11 is via cylinder 17, piston 18, push rod 20, ball screw 12, big belt wheel 13, belt 14 and small pulley 15, with the rotating shaft binding of servomotor 16.Mutual transmission of power freely between cushion pad 11 and servomotor 16.
The bottom of cushion pad 11 be formed with towards below have the cylinder 17 of opening, accommodate piston 18 freely in the slides within of cylinder 17.The inside of cylinder 17 be provided with towards the bottom surface promptly towards above recess, on the top of piston 18 protuberance is set.If piston 18 is housed in the inside of cylinder 17, the protuberance of piston 18 is entrenched in the recess of cylinder 17, just forms circular hydraulic pressure chamber 19 by the internal face of cylinder 17 and the wall of piston 18.The axle center of this hydraulic pressure chamber 19 is identical with the axle center of push rod 20 and ball screw 12.In this hydraulic pressure chamber 19, fill and impact the pressure oil that relaxes usefulness.The hydraulic pressure chamber 19 of sealing present embodiment, but also can be not shown pressure oil gateway to be set, the mode of carrying out the supply and the discharge of pressure oil freely on hydraulic pressure chamber 19.
The lower end of piston 18 is connected to the upper end of push rod 20.Form the bearing surface 20a of dome shape in the upper end of push rod 20.Although push rod 20 such bar-like members resist the axial power that acts on the end, not bending resistance square.If the upper end of push rod 20 is spherical shapes, if cushion pad 11 inclinations, also only to the axial power of push rod 20 mass actions.By structure so, can prevent the damage of the push rod 20 that eccentric load causes.
The lower end of push rod 20 is attached at the upper end of the bolt part 12b of ball screw 12.The bolt part 12b of ball screw 12 is screwed in the nut portions 12a.The lower end of nut portions 12a is attached at the upper end of big belt wheel 13, in addition, is supported on the crossbeam 6 by axles such as bearings.Small pulley 15 is attached on the rotating shaft of servomotor 16.Lash belt 14 on big belt wheel 13 and small pulley 15, mutual transmission of power freely.
Revolving servomotor 16 has rotating shaft, makes the just contrary rotation of rotating shaft by supplying with electric current.If supply with electric current to servomotor 16, the rotating shaft rotation, then big belt wheel 13 and small pulley 15 just rotatablely move.Because big belt wheel 13 and nut portions 12a are one, so the rotation of nut portions 12a and big belt wheel 13 together rotatablely moves.Along with rotatablely moving of nut portions 12a, bolt part 12b is along nut portions 12a, and above-below direction is a lifting direction rectilinear motion.Cushion pad 11 and bolt part 12b, push rod 20, piston 18, hydraulic pressure chamber 19, together elevating movement of cylinder 17.By the electric current of control supply servomotor 16, the active force that control imposes on cushion pad 11 is that the buffering that cushion pad 11 produces is pressed.
As shown in Figure 3, each side of cushion pad 11 and and the internal face of the lathe bed 9 of each side subtend between, the guiding 21 more than 1 is set.Guiding 21 is made of guiding 21a in a couple of mutual engaging and outer guiding 21b, guiding 21a in each side of cushion pad 11 is provided with, guiding 21b outside being provided with on the internal face of lathe bed 9.Guiding 21 is to lifting direction guiding cushion pad 11.
Fig. 4 represents to act in the present embodiment the load of cushion pad and the diagram of time relation.
By comparison diagram 4 and Figure 11, learn: the overbump amount of the load that acts on cushion pad 11 of present embodiment is less than in the past device.The pressure oil that is filled in the hydraulic pressure chamber 19 absorbs momentary action in the power of cushion pad 11.Thus, as shown in Figure 4, when contacting, can relax the load of cushion pad 11 from the moment that slide block 2 is accepted at patrix and workpiece 4 (with reference to Fig. 1).Therefore can relax the impact that press produces.
According to the 1st embodiment,, therefore can relax the impact that takes place at press because momentary action is absorbed, relaxes by pressure oil in the load of cushion pad.Thereby can reduce the wearing and tearing of metal die, can suppress cost and rise.In addition, can reduce impulsive sound, solve noise problem.
[embodiment 2]
In the 1st embodiment, also can on hydraulic pressure chamber 19, connect oil pressure circuit shown in Figure 6.As the 2nd embodiment, this embodiment is described.
Fig. 5 is the ideograph according to the die-cushion of the 2nd embodiment.Fig. 6 is the oil pressure line map according to the 2nd embodiment.
The pressure oil outlet of oil pressure pump 25 via check valve 51 and pipeline 27, is communicated with the pressure oil gateway of hydraulic pressure chamber 19.Connect branch line on the pipeline between oil pressure pump 25 and the check valve 51, this branch line is communicated with safety valve 52.Safety valve 52 is communicated with fuel tank 26 in addition.By safety valve 52, will be set in the pressure of regulation from the pressure oil that oil pressure pump 25 is discharged, remaining pressure oil turns back to fuel tank 26.By check valve 51, the pressure oscillation in the hydraulic pressure chamber 19 can directly not influence oil pressure pump 25 in addition.
Connect branch line on pipeline 27, this branch line is communicated with safety valve 53.Safety valve 53 is communicated with fuel tank 26 in addition.Safety valve 53 presses setting to be used to prevent overladen maximum oil pressure as safety.If the oil pressure in the pipeline 27 reaches maximum oil pressure, just open the safety-valve 53, the pressure oil in the pipeline 27 just turns back to fuel tank 26 via safety valve 53.So the oil pressure in the hydraulic pressure chamber 19 reduces.If the measured value of pressure sensor 28 reaches below the regulation pressure, not shown controller just promptly stops press.Thereby the pressure oil by in fuel tank 26 discharge lines 27 prevents overload.
Fig. 7 is the oil pressure line map according to the another way of the 2nd embodiment.
As shown in Figure 7, also can replace the safety valve 53 of Fig. 6, directional control valve 54 is set.Usually, directional control valve 54 by guiding valve that is pressed on self inside or lift valve etc., cuts off pipeline 27 and fuel tank 26 by elastic force.Measured value at pressure sensor 28 surpasses under the situation of regulation pressure, and overladen danger is arranged.The measured value of pressure sensor 28 is exported to pressure control part 29, surpass in measured value under the situation of regulation pressure, pressure control part 29 is to directional control valve 54 output safety signals.Directional control valve 54 excitation of input safety signal is located at the coil of himself inside.If the pressing force that the propulsive force that magnetic force forms forms greater than elastic force, guiding valve or lift valve etc. move.So switching direction control valve 54, pipeline 27 and fuel tank 26 connections.So the pressure oil in the pipeline 27 via directional control valve 54, turns back to fuel tank 26.Pressure control part 29 and safety signal are together exported washout to the controller of not shown press.So prevent overload.
Fig. 8 also is the oil pressure line map according to the another way of the 2nd embodiment.
As shown in Figure 8, also can replace the safety valve 53 of Fig. 6, protective valve 55 is set.Protective valve 55 has small-bore 55a of grease chamber and bigbore air chamber 55b, has in addition by small-bore piston freely and the piston 55c that slip heavy caliber piston freely constitutes in air chamber 55b of sliding in the 55a of grease chamber.Pipeline 27 and the 55a of grease chamber are communicated with.Air chamber 55b via directional control valve 56, check valve 57 and regulator 58, is communicated with air potential source 59.Side at the 55a of grease chamber is provided with oil pressure pump.Oil pressure pump is communicated with fuel tank 26.
Oil pressure in pipeline 27 is to be used to prevent under the situation of overladen maximum oil pressure, and piston 55c presses by the air in the regulator 58 setting air chamber 55b for balance.If promptly the oil pressure in the pipeline 27 reaches more than the maximum oil pressure, piston 55c is just to air chamber 55b side shifting.By moving of piston 55c, pipeline 27 and fuel tank 26 are communicated with.So the pressure oil in the pipeline 27 turns back to fuel tank 26 via protective valve 55.If piston 55c is to air chamber 55b side shifting, approaching switch just detects moving of piston 55c, to the controller output washout of not shown press.Controller, the washout according to input promptly stops press.So prevent overload.
Usually, directional control valve 56, by elastic force by the guiding valve that is pressed on self inside or lift valve etc., connecting pipeline 27 and fuel tank 26.If the solenoid of directional control valve 56 inside is energized, just in guiding valve or lift valve etc., produce the propulsive force that magnetic force forms.If the pressing force that the propulsive force that magnetic force forms forms greater than elastic force, guiding valve or lift valve etc. move.Like this switching direction control valve 56, the air in the air chamber 55b is emitted to atmosphere via silencer 60.So the oil in the hydraulic pressure chamber 19 turns back to fuel tank 26.Mainly when safeguarding, carry out so operation of directional control valve 56.
Below, the FEEDBACK CONTROL of die-cushion is described.
Fig. 9 is the controll block figure of the FEEDBACK CONTROL of carrying out according to the 2nd embodiment.
Various determinators are set on die-cushion 10.Between cushion pad 11 and lathe bed 9, be provided with the lifting direction as the linear movement pick-up 22 of measuring direction.Scale portion in the linear movement pick-up 22 is set on the internal face of lathe bed 9, head near scale portion be fixed on cushion pad 11 sides.Along with the elevating movement of cushion pad 11, head moves along scale.By this linear movement pick-up 22, measure the lifting position of cushion pad 11.In addition, encoder 19 is set around the rotating shaft of servomotor 16.By this encoder 19, measure the rotary speed of servomotor 16.Each measured value is inputed to pad control part 30, and output is supplied with electric current to servomotor 16.
It should be noted that wherein " pressure " of pressure figure is meant the pressure of the strain that is included in load that cushion pad 11 produces and produces at the parts of cushion pad 11.Load has dependency relation each other with strain.Also can utilize the oil pressure in the hydraulic pressure chamber 19 when in addition, as the present invention hydraulic pressure chamber 19 being set.
About the FEEDBACK CONTROL of carrying out, pressure feedback control is described at first herein, at pad control part 30.
The pressure that is determined at cushion pad 11 generations with pressure sensor 28 promptly cushions pressure, and its value is exported to pressure comparing section 33 as pressure feedback signal Spf.In pressure comparing section 33, the value of comparative pressure feedback signal Spf and the value of pressure controling signal Sp generate pressure correction signal Spc.Corrected signal Spc is exported to pressure control part 34.At pressure control part 34, based on pressure correction signal Spc, obtain the suitable speed of servomotor 16, generate motor speed control signal Sr1.Sr1 exports to speed comparing section 35 with the motor speed control signal.
With the rotary speed of encoder 19 mensuration servomotors 16, its value as feedback speed signal Srf, is exported to speed comparing section 35.In speed comparing section 35, relatively the value of motor speed control signal Sr1 (being Sr2 when position feedback control) and the value of feedback speed signal Srf generate motor speed corrected signal Src.Src exports to speed controlling portion 36 with the speed corrected signal.At speed controlling portion 36, based on motor speed corrected signal Src, obtain the suitable current value of servomotor 16, generate current controling signal Sc.Current controling signal Sc is exported to electric current comparing section 37.
Measure the electric current of supplying with servomotor 16 by current detecting part 39, its value as current feedback signal Scf, is exported to electric current comparing section 37.In electric current comparing section 37, relatively the value of current controling signal Sc and the value of current feedback signal Scf generate electric current corrected signal Scc.Scc exports to current control division 38 with the electric current corrected signal.At current control division 38,, obtain the suitable supply electric current I of servomotor 16 based on electric current corrected signal Scc.To supply with electric current I and export to current detecting part 39, supply with servomotor 16 simultaneously.So servomotor 16 drives cushion pad 11.The active force that this moment, cushion pad 11 generations on one side made progress, on one side descending motion.The buffering of so being set is pressed.
Below, position feedback control is described.
Measure the height and position of cushion pad 11 with the head of linear movement pick-up 22, its value is exported to position comparing section 43 as position feed back signal Shf.In position comparing section 43, the value of comparison position feedback signal Shf and the value of position control signal Sh generate position correction signal Shc.Shc exports to position control section 44 with the position correction signal.In position control section 44, position-based corrected signal Shc obtains the suitable speed of servomotor 16, generates motor speed control signal Sr2.Sr2 exports to speed comparing section 35 with the motor speed control signal.Speed comparing section 35 later flowing of signal are controlled identical with pressure feedback.
In addition, on pad control part 30, also can make controller 31 sides have the function that controls to speed controlling portion 36, make amplifier 32 sides have the later function of electric current comparing section 37.
By the switching manipulation of switching part 45, switch pressure feedback control and position feedback control.In the present embodiment, under the situation of the 1st switching time that the detection patrix contacts with workpiece, switch to pressure feedback control from position feedback control, under the situation of the 2nd switching time that detects cushion pad 11 arrival bottom dead centres, switch to position feedback control from pressure feedback control.
The 1st switching time, be when the decline of cushion pad 11, when the measured value of the head of (patrix contacts with workpiece, when beginning to produce the pressure of cushion pad 11) or linear movement pick-up 22 reached the 1st assigned position when the measured value of deformeter 17 reached the 1st threshold value (when cushion pad 11 reaches patrix and workpiece position contacting).The 2nd switching time, be when the decline of cushion pad 11, when the measured value of the head of (patrix separates with workpiece, when the pressure of cushion pad 11 disappears) or linear movement pick-up 22 reached the 2nd assigned position when the measured value of deformeter 17 reached the 2nd threshold value (when cushion pad 11 reaches bottom dead centre).
Below, adopt Fig. 9, Figure 10, the running of cushion pad 11 and the relation of pressure position FEEDBACK CONTROL are described.
Figure 10 is the diagram of the running of expression slide block and die-cushion, the variation of the position of expression time dependent slide block of companion and die-cushion.
On press, the impact when contacting with workpiece in order to relax patrix is carried out the preparation of cushion pad 11 and is quickened.Prepare acceleration from moment t1 to the t2., carry out position feedback control around here at pad control part 30, according to the location graphic of predetermined location measured value, the position of control cushion pad 11.Cushion pad 11 descends according to its result.
At moment t2 (the 1st switching time), patrix contacts with workpiece.At this moment, in switching part 45 change-over switches of filling up control part 30.Switch to pressure feedback control from position feedback control.To the t3, slide block 2 and cushion pad 11 one descend, the deep-draw processing work from moment t2.At this moment, carry out pressure feedback control at pad control part 30, according to the pressure figure that preestablishes the piezometry value, control imposes on the active force of cushion pad 11.Cushion pad 11 descends according to its result.
At moment t3 (the 2nd switching time), slide block 2 and cushion pad 11 arrive bottom dead centre.At this moment, at the switching part 45 of pad control part 30, change-over switch is switched to position feedback control from pressure feedback control.To the t4, slide block 2 and cushion pad 11 form one, the amount of the service hoisting that only rises from moment t3.To the t5, the cushion pad locking temporarily stops ascending motion from moment t4.Begin ascending motion once more at moment t5 cushion pad 11.More than, after the t3, carry out position feedback control constantly at pad control part 30, according to the location graphic of predetermined location measured value, the position of control cushion pad 11.Cushion pad 11 rises according to its result.
According to the 2nd embodiment, press when above owing to reach regulation at oil pressure, from hydraulic pressure chamber discharge pressure oil, press stops, so can prevent the damage of the die-cushion that overload causes.
In addition,,, carry out pressure feedback control, so buffering that can high accuracy control cushion pad is pressed owing to adopt the oil pressure of the load accept cushion pad according to the 3rd embodiment.Therefore can improve the processability of forcing press.
Claims (3)
1. die cushion, while have cushion pad, apply that active force lifting upwards drives the servomotor of cushion pad and in the time of the power of cushion pad transmission servomotor also from the supporting mechanism of below support cushions, it is characterized in that:
On the axle center of the supporting mechanism between cushion pad and the supporting mechanism, has the hydraulic pressure chamber that is used for filling liquid.
2. die cushion as claimed in claim 1 is characterized in that:
Also have output mechanism, be used for reaching regulation and press when above, discharge described liquid from described hydraulic pressure chamber at described liquid.
3. die cushion as claimed in claim 1 is characterized in that also having:
Measure the pressure sensor of the pressure of described liquid;
The measured value of adopts pressure sensor is controlled the controlling organization of the running of described servomotor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004163198 | 2004-06-01 | ||
| JP2004163198 | 2004-06-01 | ||
| JP2005154028 | 2005-05-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1704185A CN1704185A (en) | 2005-12-07 |
| CN1309499C true CN1309499C (en) | 2007-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100746893A Active CN1309499C (en) | 2004-06-01 | 2005-05-30 | Die cushion device |
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| CN (1) | CN1309499C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4986112B2 (en) * | 2006-02-27 | 2012-07-25 | 株式会社Ｉｈｉ | Cushion load control device and press machine equipped with cushion load control device |
| JP4956022B2 (en) * | 2006-03-03 | 2012-06-20 | コマツ産機株式会社 | Die cushion control device for press machine |
| JP4787642B2 (en) * | 2006-03-22 | 2011-10-05 | コマツ産機株式会社 | Die cushion control device for press machine |
| CN101176898B (en) * | 2007-04-26 | 2010-12-22 | 王新田 | Method of preparing frying pan extrusion and mold thereof |
| JP5466834B2 (en) * | 2008-05-22 | 2014-04-09 | 株式会社小松製作所 | Die cushion device |
| ES2839075T3 (en) * | 2015-07-06 | 2021-07-05 | Feintool Int Holding Ag | Procedure and device for reducing shear impact in a precision cutting press |
| CN108916337A (en) * | 2018-07-20 | 2018-11-30 | 长久（滁州）专用汽车有限公司 | A kind of Precision Lead-Screw limiting device |
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| JPH01147841A (en) * | 1987-12-04 | 1989-06-09 | Rohm Co Ltd | Laying out method for cad |
| JPH07155998A (en) * | 1993-12-06 | 1995-06-20 | Kurimoto Ltd | Hydraulic die cushion device of punching hydraulic press of stepped forging |
| JPH0757435B2 (en) * | 1991-04-15 | 1995-06-21 | アイダエンジニアリング株式会社 | Diction shock absorber for press machine |
| US5528918A (en) * | 1993-05-25 | 1996-06-25 | Toyota Jidosha Kabushiki Kaisha | Method and apparatus for adjusting pressure of cushioning pneumatic cylinder on press when cushion platen is at setup position |
| JP2596077B2 (en) * | 1988-07-26 | 1997-04-02 | 石川島播磨重工業株式会社 | Die cushion device |
| JPH10202327A (en) * | 1997-01-22 | 1998-08-04 | Aida Eng Ltd | Die cushion controller of press |
| JP2003136299A (en) * | 2001-11-07 | 2003-05-14 | Press Kogyo Co Ltd | Hydraulic cushion device built in press die mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01147841A (en) * | 1987-12-04 | 1989-06-09 | Rohm Co Ltd | Laying out method for cad |
| JP2596077B2 (en) * | 1988-07-26 | 1997-04-02 | 石川島播磨重工業株式会社 | Die cushion device |
| JPH0757435B2 (en) * | 1991-04-15 | 1995-06-21 | アイダエンジニアリング株式会社 | Diction shock absorber for press machine |
| US5528918A (en) * | 1993-05-25 | 1996-06-25 | Toyota Jidosha Kabushiki Kaisha | Method and apparatus for adjusting pressure of cushioning pneumatic cylinder on press when cushion platen is at setup position |
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| JP2003136299A (en) * | 2001-11-07 | 2003-05-14 | Press Kogyo Co Ltd | Hydraulic cushion device built in press die mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1704185A (en) | 2005-12-07 |
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