CN1077465C - Hydraulic deep dawing equipment of a pressing machine for mfg. streched thin plate former - Google Patents
Hydraulic deep dawing equipment of a pressing machine for mfg. streched thin plate former Download PDFInfo
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- CN1077465C CN1077465C CN96100986A CN96100986A CN1077465C CN 1077465 C CN1077465 C CN 1077465C CN 96100986 A CN96100986 A CN 96100986A CN 96100986 A CN96100986 A CN 96100986A CN 1077465 C CN1077465 C CN 1077465C
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Abstract
The hydraulic deep-drawing unit for double-action presses incorporates a ram which is lockable to the press frame at a short distance (0.5-5 mm) above the workpiece, with the gap being bridged by means of an array of short-stroke cylinders. When the unit is used to produce an asymmetric two-compartment rinsing bowl, hydraulically operated draw-pins are applied directly along the draw-ring line, and they exert a max. force in the region of the bridge between the two draw-punches, so that with a diminishing force profile along the edges of the rinsing bowl being produced, flow of the sheet material into this region is made easier.
Description
The hydraulic deep-drawing that the present invention relates to a kind of forcing press of the sheet moulding spare that is used to stretch is stretched device.
In the thin plate deep drawn is shaped processing, adopt programme controlled multiple spot deep drawn pad more and more.All this stretching pad main purposes are to eliminate for example influence of the mechanical wear of slider tilt or stretching bar of some unfavorable factors.
Deutsche Bundespatent prospectus DE-OS4122128 has disclosed a kind of hydroelastic system deep drawn device, and the short stroke piston of wherein all band plug-in type stretching bars merges in some power active regions by the geometry of workpiece, so that carry out computer numerically controlled programme-control.But, in the programme-control that the deep drawn of two holes wash bowl is shaped, and where how several undeclared these power active regions should be divided into that along in the material flow limit scope between the pull and stretch punch of stretching die profile, for example in " baffle (steg) " compressive strain district.
Certainly, all these new-type servo-hydraulic numerical control multiple spots stretch to fill up and also have shortcoming more or less, be that mould must match with this stretching pad, that is to say, existing a large amount of habitual moulds in sheet moulding processing, for example be used to have the mould on two dynamic compressors of blankholder slide, or be used to have the mould that stretches on the single action press of pad, as a rule, be not adapted to the repacking that this new-type hydroelastic system multiple spot stretches and fills up in addition, be impossible use again, on the other hand, because the rationalization effect that adopts this new-type numerical control hydraulic elastic stretching pad to be brought, all produce significant impact like this for the competitiveness of sheet moulding processing enterprise, must be converted to this new technology to cause them.And in most deep drawn were shaped processing, the investment of existing a complete set of mould was far longer than the investment of press, for example the investment on a single action deep drawn press.Because traditional mould is reequiped a lot of fund that need to drop into for new manufacturing process,, promptly adopt a kind of numerical control multiple spot of the new-type interior dress pad that stretches so press design is proposed a new problem.
Therefore, the task of dominant patent DE-PS4435069 is exactly to design a kind of hydroelastic system stretching pad press together that is equipped with, the existing mould of deep drawn shaping that can be in the past traditional, must just can not use through expensive adaptability repacking, and reach such purpose, promptly make this old-fashioned mould can meet new-type numerical control, work is carried out in the stretch requirement of pad of the multiple spot that is divided into the power active region.The major advantage of this patent application is that the mould of traditional single action press need not bother and expensive adaptability repacking, among the programme-control deep drawn processing that just can be applicable to regulate and control by the multiple spot power of numerical control.This method according to patent DE-PS4435069 also has following advantage:
-compare with traditional hydraulic press that a large amount of hydraulic oil are housed, this traditional press is in bearing close retaining force (Schlie β haltekraft) and when active force has deviation, owing to oily compressibility presents a kind of very big rebound effect, and be to carry out mechanical interlocking by the good mechanical pull bar of rigidity in the present invention, but produce a firm basically closed fixture system (System als Zuhaltevorrichtung).
-short stroke oil cylinder has only oil mass seldom, even therefore this patent press is when the active force curvilinear motion, the saltation of power (Kraftsprunge) also can be finished in several milliseconds.
-under defined terms, control (Echtzeitregelung) in real time can be carried out in the deep drawn stroke without restriction, and is special also passable when very high forming speed.
When only being the deep drawn of single double flute wash bowl of partly forming; if two grooves are by the identical and symmetrical division of geometry; then in the baffle zone of former ring flat-plate; owing to be the mobilization force of symmetry effect; a kind of poised state can occur, therefore in the baffle zone, not need by the other means power of exerting one's influence.
This poised state that acts on the mobilization force in baffle zone, when the geometric figure of one degree of depth when basin, drift geometrical surface and basin is inequality, will be changed at once, that is to say, when very asymmetric, the basin of two different sizes for example on the geometry of two basins, occurs,, edge crack can occur in the barrier zone because the slab material in gabarit zone can flow to bigger gabarit surface.In order to prevent this defect, on traditional mould, paper on the pad in the baffle zone between patrix and pull and stretch concave template is to increase thin plate upper surface pressure partly.
Solution by dominant patent has also further been expanded, even one asymmetrical is the double flute wash bowl that single part is formed, area between its two groove, the degree of depth, gabarit shape all are asymmetric physical dimensions, and very high drawing coefficient is arranged, light sheet material flows into asymmetrical wash bowl gabarit, that is to say, will be similar to the active force curve of asymmetrical how much stretching die gabarits with the best, assurance have one flawless, the forming process of no wrinkle.
To achieve these goals, the hydraulic deep-drawing that the invention provides a kind of two-way operation press of the sheet moulding spare that is used for stretching is stretched device, it is equipped with the drift that moves along draw direction and the nest plate of a hydraulic support, supporting some plunger rods in the grid regions of the workbench on this plate, plunger rod is to be arranged in the drift outer contour, drift is supported on the nest plate together with plunger rod, this moment, nest plate was can be withstood up or down by one or several hydraulic pressure execution devices, in addition, a stretching backing plate is housed below the flanging plate, is furnished with short stroke cylinder and the short stroke piston and the jumper bar of some multiple spot control usefulness in this backing plate according to the outline (drift outline) of stretching concave template; Slide block is housed on the press, this slide block is moved downward near workpiece, but leave the space Δ n of about 0.5-5mm, this moment can be with slide block and the locking of press base, locking is nonslipping connection, the short stroke cylinder is hydraulic starting in the power active region in pulling force and pressure distortion zone respectively, and make up behind the Δ n of space the workpiece roof pressure on the stretching concave template, drift is finished drawing stroke H by nest plate and by plunger rod, this moment is according to dominant patent 4435069, for the asymmetrical double flute wash bowl of deep drawn, jumper bar near some hydraulic controls of stretching concave template outline will enter work, be applied with maximum active force in the middle baffle zone of jumper bar between two drifts, active force then reduces rapidly when move towards the double flute wash bowl outward flange of processing, so that light sheet material is mobile along middle baffle direction.。
Principle and advantage of the present invention can outline as follows, by the active force of concentrating in the baffle region height, to stop flowing of herein light sheet material, and by active force curve the outer peripheral hydraulic cylinder from the baffle zone to basin constantly reduce impel material to flow to increase gradually.If be the active force curve of parabolic characteristic and be according to lamella thickness (for example be 0.6-0.8mm) and quality of materials (intensity and mobile performance) correctly control, then just be cut to the identical stretching annex inclination angle of tan α=Y: X, can accurately as one man repeating.From the present invention as can be seen, the double flute wash bowl of an asymmetric shape, or the workpiece of similar asymmetric shape, has only the active force curve of controlling by asymmetricly, just might adopt the part drawing process of not scrapping, because maximum force localization always begins then to reduce gradually from the baffle center, just may successfully control asymmetric material and flow.Best situation is that the baffle of two groove centers is straight shape, and the groove on opposite top is the garden arc, and like this, therefrom the septum cordis shelves are toward groove on one side, and can be controlled so as to is the decline active force curve of a parabolic characteristic.This moment is in the scope of ratio at 5: 1 to 4: 1 of the minimum force of the outer rim garden arc of the maximum, force at center baffle place and groove.
According to Deutsche Bundespatent 4122128, placement of mechanical stretching bar is favourable between flanging plate and short stroke hydraulic cylinder, under the special narrow space condition in the baffle district of flanging plate is favourable, this set can make directly along high concentrated active force is arranged on the pull and stretch groove of two stretching drifts, like this, can stop the light sheet material between two grooves to cross flowing back and forth of center baffle effectively.In order to impel light sheet material to flow along center baffle direction when drift work is moved, or in order to help light sheet material to flow into trench bottom, the optimal site in the flanging plate and on two drifts is provided with some lubricated oil bags.By arranging lubricated oil bag in the crucial shaped region on flanging plate and two drifts best, will help the mobile performance of light sheet material.
By the deep drawn device that the built-in type material flow hydraulic control system (integrierter hydraulischer Flie β frontsteuerung) of drawing-being pressed in the shape zone is housed of the present invention, also can be effectively applied on the forcing press of general one-way only operation.
Other appropriate design structures of the present invention can be consulted following accompanying drawing and are illustrated.
Accompanying drawing is:
Fig. 1 is the front view with press of deep drawn device of the present invention
Fig. 2 is the cutaway view in " Z zone " among Fig. 1
Fig. 3 is the vertical view of deep drawn device among Fig. 1
Fig. 4 is the interior active force curve map of stroke H among Fig. 3
Fig. 5 is the floor plan at short stroke cylinder piston, and active force curve and sheet blanking situation are arranged
The blanking thin plate of Fig. 6 presentation graphs 5 situation after the punching press first time
Fig. 7 is that the lubricating oil bagging is put and the vertical view of flanging plate
The lubricating oil bagging by Fig. 7 that Fig. 8 is illustrated in the stripping and slicing district " E " among Fig. 1 is put situation (before the deep drawn process)
Fig. 9 is illustrated in the lubricating oil bag layout drawing by figure B (for the first time after the deep drawn) in the stripping and slicing district " E " among Fig. 1
Figure 10 has represented the lubricated oil bag situation of the flanging plate in " B " zone among Fig. 9 with magnification ratio, and
Figure 11 represents to lubricate in the drift in " C " zone among 3 Fig. 9 the oil bag situation with magnification ratio,
Fig. 1 to Figure 11 has represented the deep drawn device of the present invention in the press 1.Operating position when press closes is represented on the left side of Fig. 1, and the right is represented deep drawn and is crossed the state of Cheng Qian.This moment, press 1 was born the function of closed fixture and device for clamping mould.That is to say, the function of closed oil cylinder 2 is to make moving of slide block 3 and mold 4 along with open and close motion vertical ground hydraulic pressure moves, by at least two pull bars 5, preferably four pull bars 5 bear the static deformation power that is produced in the deep drawn forming process when closing position.For this reason, when closing position, pull bar 5 should be locked in the mechanical locking device of hydraulic control so that below press rack workbench 7 and above slide block 3 between the deformation force that produced can be absorbed.
Fig. 2 is the enlarged drawing in " Z " district among Fig. 1, and it is analysed and observe along " A-A " among Fig. 3.Upper mold section 4 is to fixedly connected by habitual structural shape with stretching concave template 8, and female die is made up of following function element:
-stretching drift 9 and 14
-flanging plate (Blechhalteplatte) 10
-multiple spot stretching backing plate 11
The hydraulic control plate 12 of-short stroke oil cylinder 13
These short stroke oil cylinders 13 be merge in each multiple spot stressed draw or the Zhu Li active region 25 of molded scope in (referring to Fig. 3).Each power active region 25 is controlled by hydraulic control plate 12 respectively.Express the example of workbench 15 and hydraulic tensioning backing plate 11 in Fig. 2 and Fig. 3, there is Z1 the power active region that the pad that stretches is divided, Z2, Z3, D2, D1.2, D1.3, D1.4.In narrow grid regions, short stroke oil cylinder 13 and 26 is round two stretching die (Ziehringgeometrie) outlines of cheating wash bowl profiles (Doppelspulenkontur) according to this example.Workbench 15 at first clamps on the table top in central authorities and is provided with stretching plunger rod eyelet 16.Correspondingly insert many mechanical stretching plunger rods 17 according to the geometry of stretching drift 9 and 14, these plunger rods are supported in again on the stretching nest plate 18.
The deep drawn course of work by dominant patent is as follows:
When press 1 is opened, above the stretching drift 9 and 14 that level and smooth workpiece plate 19 is placed on flanging plate 10 and lowers in advance, then in closure moves fast, slide block 3 is fallen near above the workpiece 19 with machinery or hydraulic way, but still leave the small gap Δ n of 0.5-5mm, and by pull bar 5 and locking element 39 slide block 3 and press base 7 are linked together in the hydraulic machinery mode.This function has two advantages:
Because guiding mechanism 2 is different with the very complicated close mechanism on the conventional press, it only needs to move the weight of self.In the hydraulic structure pattern, only need the very a spot of oil of pumping.A kind of benzene that bears closed bed knife (Zuhaltekraft) is heavy and the high hydro-mechanical unit of cost is necessary on conventional press, but just unnecessary on this press, so can very promptly open press and closed press.So this press system, with respect to the crankshaft press of the closed frequency of height (Schlie β hubfrequenzen), its manufacturing cost can obviously be reduced especially.Owing to leave Δ n space during slide block 3 lockings, in quick-make is moved, can not cause dynamic impulsion to workpiece plate 19.The accelerator in advance (Vorbeschleunigungsprozeduren) of the waste of hanking of conventional stretching backing plate also can be saved.After slide block 3 and Working gantry 7 are locked, short stroke oil cylinder 13/ short stroke piston 21 will enter hydraulic, and top pressing board 10 will be raised a space distance, delta n by hydraulic pressure, so that workpiece 19 leans on stretching concave template 8.If space Δ n is made up, the drift 9 and 14 that then stretches will begin in a minute and crosses stroke H and move, and each power active region 25 will be controlled by the preprogram stress curve this moment.Stretching nest plate 18 will be by at least two, preferably four hydraulic controllers 23 controls and moving in the vertical direction, and two or four hydraulic controllers 23 should be controlled among parallel the moving, in case major structure becomes stretching nest plate 18 to tilt.
According to the present invention and Fig. 5, the active force curve of the multi-dot hydraulic pressure flanging cylinder of being invented (Blechhaltezylinder) is adjusted way (Einstellstrategic), can be applicable to the dark single-piece double flute wash bowl of the very big basin of punching press.The very big basin of what is called is dark, reaches capacity scope and is asymmetric geometry between two basins at drawing coefficient exactly.In addition, can find out also with reference to the accompanying drawings that this hydraulic pressure short stroke flanging cylinder 13 and 26 is assembled in situation in the counterdie by Deutsche Bundespatent 4122128 along the stretching concave template of double flute geometry or workpiece outline 20.Mechanical jumper bar 17 and short stroke piston 21 are arranged between flanging plate 10 and hydraulic pressure short stroke cylinder 13 and 26, advantageously can make between the basin profile and sentence the active force that reaches a high concentration near two drifts 9 and 14.Particularly more seem favourable under the narrow space situation in the barrier zone 32 of flanging plate 10.On the mould of routine, not other layout jumper bar stops light sheet material 19, and from then on groove is moving to those concentrated flows, and pad is put paper (about 0.05-0.15mm is thick) between the patrix 4 in baffle zone 32 and stretching concave template 8, to increase the surface pressing on the thin plate 19 partly.When taking by the present invention that hydraulic pressure is auxiliary to stretch, can stop flowing of this material by control action power on purpose.Way is: can be by increasing the hydraulic pressure in the short stroke cylinder 26, keep very for a short time and make at the flanging plate 10 in baffle zone 32 and the flow gaps b between the stretching concave template 8, material can not to occur in the baffle zone 32 between two drift gabarits 20 mobile thereby make.For this reason, preferably below central baffle 24 and between hydraulic pressure short stroke piston 21 and flanging plate 10, arrange more than two controlled hydraulic short stroke cylinder 26 with mechanical jumper bar 17.According to Fig. 5, profile very inequality is arranged, and garden arc radius R and r difference are also very big, then in deep-draw to the stroke of the dark H of maximum basin, require sheet material to thin plate workpiece 19 to flow and control.In order to prevent to produce edge crack 29 in baffle zone 32 owing to too high surrender stretches, the material that must adopt big garden arc radius R to help thin plate 19 flows.This flowing should be realized by the asymmetrical active force curve among Fig. 5.Concentrate to heavens by active force in baffle zone 32 to stop flowing of material, and constantly reduce active force until summit 30, increase material gradually and flow along garden arc radius R.This situation can punching press curve 31 gradient illustrate.If correctly control the active force curve that reaches parabolic characteristic according to thickness b1 of thin plate 19 (for example 0.60 or 0.80mm) and quality of materials (intensity and mobile performance), then can repeat identical punching press curve 31 gradients exactly, its tangent tan α=Y: X.The qualified deep-draw process of the double flute wash bowl of an asymmetric appearance has only by asymmetricly the control action force curve is just possible.Because always concentrate when the beginning of baffle 24 central authorities, then active force is to reduce gradually, just may successfully be controlled to asymmetrical material and flow the punching press curve 31 of inclination just as shown in Figure 6 the active force topnotch.Stop like this, effectively cross in (or between two drifts 9 and 14) between two grooves in the middle of baffle 24 flow back and forth.For quasi-static ground changes clamping gap between flanging plate 10 and the stretching concave template 8, and finish to be shaped by moving of effective hydraulic stretching drift and process, but then be provided with the jumper bar 17 of some hydraulic controls along stretching concave template outline 20.In order to help thin plate 19 materials to flow along direction 33, when drift 9 and 14 moves, and help light sheet material moving to the basin underflow, in flanging plate 10 and in two drifts 9 and 14, be provided with lubricated oil bag 34,35,36,37 (extremely shown in Figure 11) as Fig. 7.Along with by plunger rod 17 drifts 9 and 14 bottom-up move, promptly in this deep drawn forming process, among our the blanking nib 22 opened that thin plate is pressed into stretching concave template 8.This moment, plunger rod 17 was to be supported on the nest plate 18 that the hydraulic pressure below the mould moves.In Fig. 1 and Fig. 2, express the dynamic compaction (DC) process, be that thin plate 19 goes by the jacking of drift 9 and 14, to change shape along the profile that opens wide of the blanking nib 22 of pull and stretch concave template 8 outlines 20, that is to say, as shown in the detail drawing E in Fig. 8 and Fig. 9, thin plate 19 will be along stretching concave template outline 20, asymmetric drift 14 in a big way in, in drawing gap b, flow at the bottom of being with deeper and deeper shaping basin, that is to say that thin plate 19 is thinned to thickness b2 the detail drawing B of Figure 10 from original thickness b1.In this case, will slide along the basin inner outline in top 14.For the resistance of reducing friction, advantageously generate one deck lubricating oil film 6 in the stretching space b between thin plate 19 and punch head surface now.Lubricating oil is to send crucial influence area to by the lubricated oil bag 36 that is arranged in the flanging plate 10, and a less drift 9 is situation too.In the flanging plate 10 of pull and stretch concave template exterior contour scope, be furnished with lubricated oil bag 37 near middle baffle 24 places.
As mentioned above, thin plate 19 is clamped by short stroke hydraulic cylinder 26 between the middle baffle 24 and stretching concave template 8 of flanging plate 10, just is prevented from flowing.Like this, this constitutes the basin bottom part material requested, mainly from the outside, on purpose flows to from the outside by flow direction shown in Fig. 7 33.But, shown in the detail drawing C among Figure 11, on the arc radius D of the drift garden of two drifts 9 and 14, flow-drawing is unavoidably arranged, so light sheet material 19 can slip around punch radius P owing to be applied with drift power.In order to alleviate this flow-drawing load, this load finally can make the plate in the flow region 38 become thinner, so lubricated oil bag 34 and 35 is set on drift 9 and 14, so that the big garden arc radius P zone at drift constitutes lubricating oil film 6, this oil film 6 in drawing process by a kind of quite high lubricating oil pressure, constantly from lubricated oil bag 34 or 35 and continue to form.
Claims (7)
1. the hydraulic deep-drawing of the two-way operation press of the sheet moulding spare that is used for stretching is stretched device, it is equipped with the drift that moves along draw direction and the nest plate of a hydraulic support, supporting some plunger rods in the grid regions of the workbench on this plate, plunger rod is to be arranged in the drift outer contour, drift is supported on the nest plate together with plunger rod, this moment, nest plate was can be withstood up or down by one or several hydraulic pressure execution devices, in addition, a stretching backing plate is housed below the flanging plate, is furnished with short stroke cylinder and the short stroke piston and the jumper bar of some multiple spot control usefulness in this backing plate according to the outline (drift outline) of stretching concave template; Slide block is housed on the press, this slide block is moved downward near workpiece, but leave the space Δ n of about 0.5-5mm, this moment can be with slide block and the locking of press base, locking is nonslipping connection, the short stroke cylinder is hydraulic starting in the power active region in pulling force and pressure distortion zone respectively, and make up behind the Δ n of space the workpiece roof pressure on the stretching concave template, drift is finished drawing stroke H by nest plate and by plunger rod, this moment is according to patent 4435069, it is characterized in that, for the asymmetrical double flute wash bowl of deep drawn, jumper bar (17) near some hydraulic controls of stretching concave template outline (26) will enter work, jumper bar is at two drifts (9,14) be applied with maximum active force in middle baffle (24) zone between, active force then reduces rapidly when move towards the double flute wash bowl outward flange of processing, so that light sheet material is mobile along middle baffle (24) direction.
2. stretch device by the hydraulic deep-drawing of claim 1, it is characterized in that: one by the high hydraulic coupling of concentrating in the short stroke cylinder (13) of middle baffle (24), make and effectively stoped between two drifts (9,14) light sheet material by middle baffle (24) alternately to flow to and flow out.
3. stretch device by the hydraulic deep-drawing of claim 1 or 2, it is characterized in that: when the middle baffle of processed double flute wash bowl outline of straight line preferably, and the top on its opposite is when being the garden arc, the active force curve of baffle (24) has parabolic characteristic in the middle of from the garden arc to linear, and the ratio that baffle (24) is gone up maximum, force and the minimum force at arc place, the outside garden of basin in the middle of this moment was at 5: 1-4: in 1 the scope.
4. stretch device by the hydraulic deep-drawing of claim 1 or 2, it is characterized in that: the short stroke cylinder (26), short stroke piston (21) and the jumper bar (17) that below middle baffle (24), are provided with plural hydraulic control.
5. stretch device by the hydraulic deep-drawing of claim 1 or 2, it is characterized in that: the hydraulic control jumper bar of arranging along the outline (20) of stretching concave template (17), quasi-static ground changes the drawing gap between flanging plate (10) and the stretching concave template (8) in short stroke, also finish shaping by the moving of drift (9,14) of hydraulic and process this moment.
6. stretch device by the hydraulic deep-drawing of claim 1 or 2, it is characterized in that: in flanging plate (10), near the position outline of stretching concave template (20) are provided with lubricated oil bag (36,37).
7. stretch device according to the hydraulic deep-drawing of claim 1 or 2, it is characterized in that: the lubricated oil bag (36 in flanging plate (10), 37) be near the arc place, garden, the wash bowl outside of stretching concave template outline (20), and at drift (9,14) top, in the regional vicinity of middle baffle (32) lubricated oil bag (34,35) is set also.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4435069A DE4435069A1 (en) | 1994-09-30 | 1994-09-30 | Hydraulic deep drawing unit for presses |
| DE19511379A DE19511379A1 (en) | 1994-09-30 | 1995-03-28 | Hydraulic deep-drawing unit for mfr. of two-compartment rinsing bowls |
| DEP4435069.4 | 1995-03-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1134860A CN1134860A (en) | 1996-11-06 |
| CN1077465C true CN1077465C (en) | 2002-01-09 |
Family
ID=25940655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96100986A Expired - Fee Related CN1077465C (en) | 1994-09-30 | 1996-03-14 | Hydraulic deep dawing equipment of a pressing machine for mfg. streched thin plate former |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1077465C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19641411A1 (en) * | 1996-10-08 | 1998-04-09 | Dieffenbacher Gmbh Maschf | Hydraulic deep-drawing device |
| US8756970B2 (en) * | 2011-03-14 | 2014-06-24 | Ford Global Technologies, Llc | Method of drawing a blank by preforming a channel in a preform that is subsequently drawn into a die cavity |
| CN107796604A (en) * | 2016-09-06 | 2018-03-13 | 鞍钢股份有限公司 | A kind of stamping parts of automobile rigidity property evaluation method |
| CN106827612B (en) * | 2017-04-14 | 2018-03-20 | 扬力集团股份有限公司 | A kind of forcing press for processing pop can cover plate |
| CN107127260A (en) * | 2017-07-13 | 2017-09-05 | 邹小辉 | A kind of hardware stamping panel piece stretch process die assembly |
| CN108543869B (en) * | 2018-04-27 | 2019-11-05 | 平湖市大可童车股份有限公司 | The two-sided hydraulic stamping mold of automatic demoulding |
| CN111421060B (en) * | 2020-03-16 | 2022-02-15 | 重庆庆铃模具有限公司 | Punching compound die and punching machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2989019A (en) * | 1957-05-20 | 1961-06-20 | Budd Co | Method of deep drawing sheet material |
| US3751956A (en) * | 1971-09-27 | 1973-08-14 | I P Spa Sa | Fluid-dynamic press for the cold forming of sheet metal |
| JPS6096331A (en) * | 1983-10-28 | 1985-05-29 | Aida Eng Ltd | Drawing die for press machine |
| CN2073779U (en) * | 1990-09-07 | 1991-03-27 | 临海市东方发动机部件厂 | Tensile hydraulic press |
| CN1056641A (en) * | 1989-11-29 | 1991-12-04 | 图形科技有限公司 | The apparatus and method of hydroforming sheet metal |
| DE4122128A1 (en) * | 1991-07-04 | 1993-01-07 | Dieffenbacher Gmbh Maschf | Hydro-elastic deep drawing of sheet metal workpieces - uses system which automatically actuates punch mounted in baseplate, with metal blank being gripped between hold-down plates |
| US5447723A (en) * | 1991-10-10 | 1995-09-05 | Berol Nobel Ab | Use of a triethanolamine product mixture |
-
1996
- 1996-03-14 CN CN96100986A patent/CN1077465C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2989019A (en) * | 1957-05-20 | 1961-06-20 | Budd Co | Method of deep drawing sheet material |
| US3751956A (en) * | 1971-09-27 | 1973-08-14 | I P Spa Sa | Fluid-dynamic press for the cold forming of sheet metal |
| JPS6096331A (en) * | 1983-10-28 | 1985-05-29 | Aida Eng Ltd | Drawing die for press machine |
| CN1056641A (en) * | 1989-11-29 | 1991-12-04 | 图形科技有限公司 | The apparatus and method of hydroforming sheet metal |
| CN2073779U (en) * | 1990-09-07 | 1991-03-27 | 临海市东方发动机部件厂 | Tensile hydraulic press |
| DE4122128A1 (en) * | 1991-07-04 | 1993-01-07 | Dieffenbacher Gmbh Maschf | Hydro-elastic deep drawing of sheet metal workpieces - uses system which automatically actuates punch mounted in baseplate, with metal blank being gripped between hold-down plates |
| US5447723A (en) * | 1991-10-10 | 1995-09-05 | Berol Nobel Ab | Use of a triethanolamine product mixture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1134860A (en) | 1996-11-06 |
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