CN1631662A - Multipoint blank holder force variable hydraulic press - Google Patents
Multipoint blank holder force variable hydraulic press Download PDFInfo
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- CN1631662A CN1631662A CN 200410093081 CN200410093081A CN1631662A CN 1631662 A CN1631662 A CN 1631662A CN 200410093081 CN200410093081 CN 200410093081 CN 200410093081 A CN200410093081 A CN 200410093081A CN 1631662 A CN1631662 A CN 1631662A
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- cylinder
- workbench
- blank holder
- edge
- pull
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Abstract
The invention is a multi-point altering edge pressing force hydraulic pressure presser which is for sheets pressing shaping field. The invention includes: main cylinder, bridging beam, sliding block, crutch, hydraulic power drawing mechanism, base, and workbench. The main cylinder is fixed on the bridging beam with its piston linked with the sliding block which sliding up and down along the crutch. The hydraulic power drawing mechanism is set below the workbench all supported by the base. The hydraulic power drawing mechanism includes connecting rod, several edge cylinders, jacking cylinder, soleplate, lower draw rod, drawing bed piece, jacking rod. The invention advantages are that several independent controlling edge cylinder is installed below the presser casting through the drawing bed plate on different sections of the edge rings with different edge pressing force altering by time so to precisely control the edge pressing force stroke-wise according to the technics and the designer requirements so that the sheet shaping property and size stability is greatly enhanced which lies a cornerstone for enhance the pressing piece qualities.
Description
Technical field
What the present invention relates to is a kind of forcing press, and particularly a kind of multipoint blank holder force variable hydraulic press is used for the sheet metal forming field.
Background technology
Because in the stamping process, different phase stamping parts wrinkling different with the trend of breaking, pressure-pad-force also should change along with the variation of punch travel; And the different parts of right title part needs different pressure-pad-forces just can guarantee the forming quality of stamping parts, thereby, more and more higher to the requirement of forcing press.Traditional forcing press generally adopts spring and air cushion to apply pressure-pad-force, but because the pressure-pad-force that these flexible members apply is general and the linear proportional relation of decrement of flexible member, so the pressure-pad-force that applies in the punching course can not be controlled.The die space that the while conventional elastic means is occupied is too big, has increased the cost that mould is made.When adopting air cushion, Mould design, adjustment, use are not very convenient.Because the fluctuation and the pipeline restriction loss of air pressure, the strength that air cushion provided neither be very accurate; The space that it occupies is bigger, needs to be equipped with special-purpose air compression station.Simultaneously, when adopting the air cushion flanging, the size of pressure-pad-force is subjected to the restriction of air pressure, generally can not be too big.
In order to overcome the deficiency that above pressure-pad-force applies mode, find through literature search prior art, people such as Siegert deliver " Tendencies in presses and dies for sheet metal forming processes[J] " (" materials processing technology " on " Journal of Materials Processing Technology " 98 (2000) 259-264, " sheet forming forcing press and mould development trend ") literary composition, this article proposes a kind of blank holder force variable hydraulic press based on the hydro-drawing mattress system, this forcing press is at hydro-drawing pad of forcing press bottom design, drive moving up and down of hydro-drawing pad by one or several hydraulic cylinder, then, diverse location is arranged push rod on the pull and stretch pad, obtains to apply different pressure-pad-forces at the stamping parts diverse location by the height of regulating push rod.The major defect of this forcing press is that the pressure-pad-force precision that applies of different parts is low, and simultaneously, the pressure-pad-force of different parts can not change in punching course in the variation with punching stroke.
Summary of the invention
The objective of the invention is to overcome the deficiency of traditional forcing press, the multipoint blank holder force variable hydraulic press of band hydro-drawing pad in a kind of workbench is provided, by adopting a plurality of hydraulic cylinders, make its pressure-pad-force that diverse location directly is provided, thereby in stamping process, realize changing pressure-pad-force with position and punch stroke simultaneously.
The present invention is achieved through the following technical solutions, the present invention includes: master cylinder, crossbeam, slide block, column, workbench, base and hydro-drawing pad mechanism, its annexation is: master cylinder is fixed on the crossbeam, the piston of master cylinder links to each other with slide block, slide block slides up and down along column, hydro-drawing pad mechanism is installed in the workbench bottom, and base support with upper-part, and with foundation bolt frame is fixed on the ground.
Hydro-drawing pad mechanism realizes pressure variable edge force.Hydro-drawing pad mechanism comprises: some flanging cylinders, jacking cylinder, lower link, extension bar, knock-pin, pull and stretch backing plate, base plate, its annexation is: flanging cylinder and jacking cylinder are fixed on the base plate, the lower link upper end links to each other with workbench, the lower link lower end links to each other with base plate, the piston rod of liftout tank links to each other with the pull and stretch backing plate, the pull and stretch backing plate slides along lower link, extension bar is connected on the pull and stretch backing plate, knock-pin is arranged in the workbench, pressure-pad-force passes to extension bar by the flanging cylinder, extension bar passes to knock-pin, passes to blank holder by knock-pin again.
When using punching press of the present invention, suppose to adopt 10 flanging cylinders, at first by the change value of pressure of good each the flanging cylinder of computer settings, the starting pressure machine, the jacking cylinder obtains instruction from computer and begins to drive hydraulic die cushion and knock-pin rising, knock-pin holds up blank holder and moves upward, and stops when arrival exceeds a segment distance place than punch.At this moment, the flanging cylinder rises and to contact also stop motion with extension bar, and master cylinder also drives slide block and moves downward along column, and both meet being higher than punch a distance, and along with die moves downward together.In this process, the flanging cylinder rises, and by extension bar and knock-pin pressure-pad-force is passed to blank holder, and at plate with before punch contact, obtains required pressure-pad-force and maintenance is stablized.Like this, guaranteed that the pressure-pad-force of 10 flanging cylinders sets up the synchronism of process, after pressure-pad-force is set up, master cylinder continues to force blank holder to move downward, when plate contacts with punch, drawing process begins, at this moment, computer obtains each flanging cylinder force value that pressure sensor is gathered, and and the setting value of each flanging cylinder pressure-pad-force compare, send the pressure-pad-force of each flanging cylinder of signal controlling according to comparative result, master cylinder drives die, plate, blank holder, knock-pin, extension bar and pull and stretch backing plate move downward together, when the drawing depth of determining reaches, and the release of computer control master cylinder, the master cylinder rollback, the flanging cylinder passes through extension bar with certain pressure, pull and stretch backing plate and knock-pin drive blank holder and rise, and make the stamping parts demoulding that is wrapped on the punch, when staying in the die as stamping parts, then there is the dnockout cylinder that stamping parts is hit down, finishes punching course like this one time.The present invention is equipped with the flanging cylinder that several are independently controlled in the forcing press bottom, by the hydro-drawing backing plate, the blank holder different parts is applied different time dependent pressure variable edge forces, thereby can be in stamping process.Compare with prior art, the present invention has the following advantages: 1) hydro-drawing pad mechanism is positioned at forcing press bottom and compact conformation, is easy to the transformation of conventional hydraulic single action press.2) be implemented in the punching course, accurately change pressure-pad-force, improve the sheet forming performance, reduce wrinkling and the defective of breaking, increase the stamping parts dimensional stability, improve the quality of stamping parts with position and stroke.3) by the pull and stretch backing plate, pressure-pad-force is difficult to synchronous defective when overcoming a plurality of hydraulic cylinders and independently providing pressure-pad-force.
Description of drawings
Fig. 1 is a structural representation of the present invention
The specific embodiment
As shown in Figure 1, the present invention includes: master cylinder 1, crossbeam 2, slide block 3, column 4, base 8, workbench 13 and hydro-drawing pad mechanism 5, its annexation is: master cylinder 1 is fixed on crossbeam 2, the piston of master cylinder 1 links to each other with slide block 3, slide block 3 slides up and down along column 4, hydro-drawing pad mechanism 5 is arranged on workbench 13 bottoms, and base 8 is supporting with upper-part, and with foundation bolt frame is fixed on the ground.
Hydro-drawing pad mechanism 5 comprises: extension bar 6, some flanging cylinders 7, jacking cylinder 9, base plate 10, lower link 11, pull and stretch backing plate 12, knock-pin 14, its annexation is: flanging cylinder 7 and jacking cylinder 9 are fixed on the base plate 10, lower link 11 upper ends link to each other with workbench 13, the lower end links to each other with base plate 10, the piston rod of jacking cylinder 9 links to each other with pull and stretch backing plate 12, pull and stretch backing plate 12 slides along lower link 11, and extension bar 6 is placed on the pull and stretch backing plate 12, and knock-pin 14 is arranged in the workbench 13.
The starting pressure machine is set the pressure-pad-force curve and the drawing velocity of each flanging cylinder 7, and to zero-bit, mould is in open mode with master cylinder 1 backhaul.Start jacking cylinder 9, it is up to drive pull and stretch backing plate 12, extension bar 6 and knock-pin 14, holds up blank holder, makes the blank holder surface be higher than about convex mould surface 10mm, places plate and reserves the position.Start flanging cylinder 7, the piston rod of flanging cylinder passes pull and stretch backing plate 12 and affacts on the extension bar 6, by extension bar 6 and knock-pin 14 pressure-pad-force is affacted on the blank holder.Jacking cylinder 9 drives pull and stretch backing plate 12 rollbacks, makes the piston cylinder of flanging cylinder 7 directly hold up blank holder by extension bar 6 and knock-pin 14.Start master cylinder 1, drive slide block 3 and die and depress, after die touches plate on the blank holder, force plate, blank holder descending, when the plate lower surface touches the punch upper surface, show that drawing process begins.The plate that touches on the blank holder at die touches to the plate lower surface in the process of punch lower surface, and each flanging cylinder 7 is set up stable pressure-pad-force.After punching course finished, master cylinder 1 drove slide block 3 and die backhaul, starts flanging cylinder 7, drove pull and stretch backing plate 12 and extension bar 6, knock-pin 14, blank holder and stamping parts and rose, rise to highest order after, take out stamping parts.
Claims (3)
1, a kind of multipoint blank holder force variable hydraulic press, comprise: master cylinder (1), crossbeam (2), slide block (3), column (4), hydro-drawing pad mechanism (5), base (8), workbench (13), it is characterized in that, master cylinder (1) is fixed on crossbeam (2), the piston of master cylinder (1) links to each other with slide block (3), slide block (3) slides up and down along column (4), hydro-drawing pad mechanism (5) is arranged on workbench (13) bottom, base (8) is supporting with upper-part, hydro-drawing pad mechanism (5) comprising: extension bar (6), some flanging cylinders (7), jacking cylinder (9), base plate (10), lower link (11), pull and stretch backing plate (12), knock-pin (14), some flanging cylinders (7) and jacking cylinder (9) are fixed on the base plate (10), lower link (11) upper end links to each other with workbench (13), the lower end links to each other with base plate (10), extension bar (6) is placed on the pull and stretch backing plate (12), and knock-pin (14) is arranged in the workbench (13).
2, multipoint blank holder force variable hydraulic press according to claim 1 is characterized in that, the piston rod of jacking cylinder (9) links to each other with pull and stretch backing plate (12), and pull and stretch backing plate (12) slides along lower link (11).
3, multipoint blank holder force variable hydraulic press according to claim 1 is characterized in that, some flanging cylinders (7) are arranged on the forcing press bottom, and independent control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410093081 CN1631662A (en) | 2004-12-16 | 2004-12-16 | Multipoint blank holder force variable hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410093081 CN1631662A (en) | 2004-12-16 | 2004-12-16 | Multipoint blank holder force variable hydraulic press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1631662A true CN1631662A (en) | 2005-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410093081 Pending CN1631662A (en) | 2004-12-16 | 2004-12-16 | Multipoint blank holder force variable hydraulic press |
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| CN (1) | CN1631662A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216360A (en) * | 2015-10-19 | 2016-01-06 | 上海理工大学 | Miniature double action hydraulic press and manufacturing process |
| CN109049740A (en) * | 2018-07-24 | 2018-12-21 | 中山市德马汽车零部件有限公司 | A kind of car door light-strip punching press tooling |
| CN109501352A (en) * | 2018-12-14 | 2019-03-22 | 合肥合锻智能制造股份有限公司 | Large-scale hydro-mechanical drawing double action hydraulic press |
| CN112461621A (en) * | 2020-11-02 | 2021-03-09 | 燕山大学 | Tailor-welded blank blocking and blank pressing forming experimental device for small test piece and using method |
| WO2023279435A1 (en) * | 2021-07-06 | 2023-01-12 | 合肥工业大学 | Electromagnetic stamping method and electromagnetic stamping device |
| US11890661B2 (en) | 2021-07-06 | 2024-02-06 | Hefei University Of Technology | Electromagnetic stamping method and device |
-
2004
- 2004-12-16 CN CN 200410093081 patent/CN1631662A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216360A (en) * | 2015-10-19 | 2016-01-06 | 上海理工大学 | Miniature double action hydraulic press and manufacturing process |
| CN109049740A (en) * | 2018-07-24 | 2018-12-21 | 中山市德马汽车零部件有限公司 | A kind of car door light-strip punching press tooling |
| CN109501352A (en) * | 2018-12-14 | 2019-03-22 | 合肥合锻智能制造股份有限公司 | Large-scale hydro-mechanical drawing double action hydraulic press |
| CN109501352B (en) * | 2018-12-14 | 2024-04-05 | 合肥合锻智能制造股份有限公司 | Large-scale liquid-filled deep drawing double-acting hydraulic press |
| CN112461621A (en) * | 2020-11-02 | 2021-03-09 | 燕山大学 | Tailor-welded blank blocking and blank pressing forming experimental device for small test piece and using method |
| CN112461621B (en) * | 2020-11-02 | 2021-09-21 | 燕山大学 | Tailor-welded blank blocking and blank pressing forming experimental device for small test piece and using method |
| WO2023279435A1 (en) * | 2021-07-06 | 2023-01-12 | 合肥工业大学 | Electromagnetic stamping method and electromagnetic stamping device |
| US11890661B2 (en) | 2021-07-06 | 2024-02-06 | Hefei University Of Technology | Electromagnetic stamping method and device |
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