CN1077680A - Punch buffer for press - Google Patents
Punch buffer for press Download PDFInfo
- Publication number
- CN1077680A CN1077680A CN 92102879 CN92102879A CN1077680A CN 1077680 A CN1077680 A CN 1077680A CN 92102879 CN92102879 CN 92102879 CN 92102879 A CN92102879 A CN 92102879A CN 1077680 A CN1077680 A CN 1077680A
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- valve
- oil
- pressure
- outlet
- cylinder
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Abstract
The invention discloses a kind of punch buffer for press, it comprises oil sources, control valve piece and buffering oil cylinder.The control valve piece is made up of check valve, overflow valve, choke valve, counterbalance valve, proportional pressure valve, pressure sensor and pressure display table, and union is contained on the valve piece.Cushion cylinder is made up of adjusting screw(rod), locking nut, cover screw, cover plate, sealing ring and cylinder body.Oil sources is made up of radiator, oil filter, check valve, fuel tank and pressure display table.Advantage of the present invention is: simple in structure, easy to install and use, versatility is good.Shock-absorbing capacity is good, and the stamping-out noise can be controlled in the 85dB (A).
Description
The present invention relates to punch buffer for press.
When being used for technologies such as punching, blanking when hydraulic press, owing to make slide block lose load suddenly during the workpiece fracture, at this moment oil cylinder inner fluid compression and the elastic potential energy that frame deflection gathered will be by instantaneous relases, make press produce huge vibration, impact and noise, and the service life of reducing hydraulic press greatly.Must adopt corresponding impact mitigation measure for this reason.
The purpose of this invention is to provide a kind of punch buffer for press,, realize that a tractor serves several purposes enlarges the scope of application to prolong the service life of hydraulic press.
Be illustrated below in conjunction with accompanying drawing.
Accompanying drawing is a hydraulic press punching buffer schematic diagram.
The hydraulic press punching buffer comprises: oil sources 1, control valve piece 2 and cushion cylinder 3. Oil sources is made up of radiator HD, oil filter FT, check valve SP, pressure display table PD1, fuel tank TK. The entrance of the outlet of radiator HD and oil filter FT and check valve SP, and pressure display table PD1 links to each other. The outlet of oil filter FT and check valve SP links to each other with fuel tank TK. The control valve piece is made up of check valve SV, overflow valve DV3, choke valve RV, counterbalance valve DV1, proportional pressure valve DV2, pressure sensor DT and pressure display table PD2, and union is contained on the valve block. The import of check valve SV and overflow valve DV3 links to each other with the outlet of oil pump PS in the oil sources, and the outlet of check valve SV links to each other with buffering oil pocket in choke valve RV, proportional pressure valve DV2, pressure display table PD2, pressure sensor DT and the cushion cylinder. The outlet of choke valve RV links to each other with the import of counterbalance valve DV1. The import of radiator HD in the outlet of counterbalance valve DV1, proportional pressure valve DV2, overflow valve DV3 and the oil sources links to each other. Cushion cylinder is made up of the short stroke oil cylinder of one or several high hydraulic rigids, and each oil cylinder is made up of adjusting screw(rod) 10, locking nut 11, cover screw 12, cover plate 13, sealing ring 14, Cylinder Plunger 15 and cylinder body 16.
The operation principle of hydraulic press punching buffer is as follows: the slider of hydraulic press 7 that drift 6 is housed moves downward with master cylinder plunger piston 8, when drift touches workpiece plate 5, namely enters impulse stroke. Suddenly fracture can take place in plate after strain and plastic deformation under pressure. Just before the plate fracture, the bottom of slider of hydraulic press contacts the top of cushion cylinder adjusting screw(rod), and promotion cushion dashpot plunger moves downward together. Because before the plate fracture, slide block is very slow together with the speed that plunger moves, so the time buffering oil pocket 17 interior oil pressure very little. And when plate ruptures, because outer the loading on of system suddenly disappears in 5～10ms, the immense pressure potential energy of savings in master cylinder epicoele 9 will impel rapidly undershoot of plunger that master cylinder plunger piston pushing away cushion cylinder together with slide block, drift. But unexpected buffering intracavity liquid by compression will be set up the velocity variations that enough big cushion effect stops the drift slide block the instantaneous of workpiece fracture under the effect of choke valve RV and proportional pressure valve DV2, thereby will obtain milder pressure and velocity variations process. The return of cushion cylinder plunger realizes by the fuel feeding of oil sources. DV1 plays the effect of counterbalance valve in the control valve piece, is used for controlling the first pressing of buffering oil pocket, in order to set up quickly enough big compensator or trimmer pressure, and buffer plunger is play supporting role. Proportional pressure valve DV2 and pressure sensor DT cooperate the situation of change that can be used to accurately control hydraulic pressure in the cushion chamber, and play the effect of safety valve. Overflow valve DV3 is used for controlling the maximum pressure of oil sources fuel feeding. Check valve SV then is used for the oil of isolation buffer oil pocket and flows back to oil sources. Choke valve RV cushions the variation of pressure in the oil pocket with the control of throttling Principles of Regulation. Pressure gauge PD2 and pressure sensor DT then are used to refer to and export the pressure in the buffering oil pocket. The height of adjusting screw(rod) can be adjusted easily according to thickness and the hardness of work piece in the cushion cylinder, so that cushioning effect point (being that slide block is run into adjusting screw(rod)) satisfies the needs of various different workpieces processing.
The present invention selects the position of cushioning effect point suitably except needs, the volume V of the damping openings of sizes of choke valve RV, the adjustment process of proportioning valve DV2 and buffering oil pocket
d(volume effect that comprises connecting pipe) and active area A
dSize all need to consider well.One highest wisdom thickness of slab is that the active area of h, press master cylinder epicoele is A
c, plate when fracture master cylinder epicoele cavity volume volume and pressure be respectively V
cAnd P
c, then cushioning effect point can be selected in drift and touches plate and be pressed between 1/3 thickness of slab; A
dShould be not less than 40%A
c; V
dSelect according to simulation optimization result of calculation, guarantee that the soaring pressure speed in the cushion chamber reaches more than the 2500MPa/S; The size of RV restriction is controlled at when buffer plunger is depressed with the speed of 25mm/s, the pressure P in the buffering oil pocket
dBe 40～60%P
C
Operation principle of the present invention is different from the buffer of general absorption impact energy, it is at the characteristics of stamping-out operating mode, adopt high rigidity throttling resistance to release method, make buffer can be when the load of stamping-out process China and foreign countries suddenly disappears just the time ground set up enough big cushion effect rapidly, make the press master cylinder unload reposefully, thereby eliminate impact shock and stamping-out noise.Its advantage is:
1. simple in structure, easy to install and use, versatility is good.The buffer of suitable size can be provided for the hydraulic press of all size.
2. shock-absorbing capacity is good, and the stamping-out noise can be controlled in 85dB(A) in.Do not compare with there being when buffering, noise attentuation reaches 15dA(A) more than.The maximal rate of drift can be controlled in the 150mm/s, improve about 6 times die life, and the blanking pressure of press only increases by 3～5%.
3. also can be used for crank-type punching machine and operating mode and similarly make buffer unit on other forging equipment.
Claims (2)
1, a kind of punch buffer for press, it is characterized in that it comprises oil sources (1), control valve piece (2) and buffering oil cylinder (3), said control valve piece is by check valve SV, overflow valve DV3, choke valve RV, counterbalance valve DV1, proportional pressure valve DV2, pressure sensor DT and pressure display table PD2 form, union is contained on the valve piece, the outlet of oil pump PS in the import of check valve SV and overflow valve DV3 and the oil sources links to each other, the outlet of check valve SV and choke valve RV, proportional pressure valve DV2, pressure display table PD2, buffering oil pocket (17) in pressure sensor DT and the cushion cylinder links to each other, the outlet of choke valve RV links to each other with the import of counterbalance valve DV1, counterbalance valve DV1, proportional pressure valve DV2, the outlet of overflow valve DV3 links to each other with radiator HD import in the oil sources, and said cushion cylinder is by adjusting screw(rod) (10), locking nut (11), cover screw (12), cover plate (13), sealing ring (14), oil cylinder plunger (15) and cylinder body (16) are formed.
2, a kind of punch buffer for press according to claim 1, it is characterized in that the outlet of radiator HD in the said oil sources and the inlet of oil filter FT and check valve SP, and pressure display table PD1 is continuous, and the outlet of oil filter FT and check valve SP links to each other with fuel tank TK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92102879 CN1077680A (en) | 1992-04-17 | 1992-04-17 | Punch buffer for press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92102879 CN1077680A (en) | 1992-04-17 | 1992-04-17 | Punch buffer for press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1077680A true CN1077680A (en) | 1993-10-27 |
Family
ID=4939903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92102879 Pending CN1077680A (en) | 1992-04-17 | 1992-04-17 | Punch buffer for press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1077680A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100503074C (en) * | 2005-04-01 | 2009-06-24 | 莫菲克科技股份公司 | Absorber of active tool |
| CN103786359A (en) * | 2012-10-30 | 2014-05-14 | 菲高公司 | Mechanical press adapted for forming processes, and method |
| CN104259292A (en) * | 2014-08-01 | 2015-01-07 | 浙江大学 | Quick return type blanking buffer device and hydropress for blanking |
| CN104842584A (en) * | 2015-05-04 | 2015-08-19 | 浙江大学 | Self-adaptive cushion cylinder blanking buffering method |
| CN104985096A (en) * | 2015-06-22 | 2015-10-21 | 中山明杰自动化科技有限公司 | Oil press capable of automatically damping |
-
1992
- 1992-04-17 CN CN 92102879 patent/CN1077680A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100503074C (en) * | 2005-04-01 | 2009-06-24 | 莫菲克科技股份公司 | Absorber of active tool |
| CN103786359A (en) * | 2012-10-30 | 2014-05-14 | 菲高公司 | Mechanical press adapted for forming processes, and method |
| CN103786359B (en) * | 2012-10-30 | 2017-03-15 | 菲高公司 | It is suitable to punching machine and the method for forming process |
| CN104259292A (en) * | 2014-08-01 | 2015-01-07 | 浙江大学 | Quick return type blanking buffer device and hydropress for blanking |
| CN104842584A (en) * | 2015-05-04 | 2015-08-19 | 浙江大学 | Self-adaptive cushion cylinder blanking buffering method |
| CN104842584B (en) * | 2015-05-04 | 2016-05-04 | 浙江大学 | A kind of automatic adaptation cushion cylinder stamping-out way to play for time |
| CN104985096A (en) * | 2015-06-22 | 2015-10-21 | 中山明杰自动化科技有限公司 | Oil press capable of automatically damping |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |