CN100537074C - A device for preventing the breakage of the suspended area during the liquid-filled deep drawing of the conical part - Google Patents
A device for preventing the breakage of the suspended area during the liquid-filled deep drawing of the conical part Download PDFInfo
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- CN100537074C CN100537074C CNB2007101443562A CN200710144356A CN100537074C CN 100537074 C CN100537074 C CN 100537074C CN B2007101443562 A CNB2007101443562 A CN B2007101443562A CN 200710144356 A CN200710144356 A CN 200710144356A CN 100537074 C CN100537074 C CN 100537074C
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- 239000007788 liquid Substances 0.000 title claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 31
- 239000000725 suspension Substances 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 4
- 239000013536 elastomeric material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 239000011230 binding agent Substances 0.000 abstract 2
- 238000003825 pressing Methods 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
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Abstract
锥形件充液拉深成形时防止悬空区破裂的装置，它涉及锥形件成形装置。它解决了现有成形工艺拉深成形的板材存在的变形的弊端，而且在对板材的施压过程中亦存在较大的冲击的问题。本发明的装置的刚性压边圈(3)设在凹模(2)上方，刚性压边圈(3)内开有凹槽，柔性支撑环(5)设在凹槽内，凹模(2)设置在流体介质腔体(1)的上面，注液孔(9)与液压系统连接。本发明还减小了板材拉深变形，而且在对板材的施压过程中能够缓冲施压，减小了对板材的冲击，本发明实现了一道工序拉深成形高径比大、半锥角大的锥形件，避免了锥形件充液拉深悬空区破裂，节省工序、降低成本、提高了效率。
The utility model relates to a device for preventing the breakage of the suspended area during the liquid-filled deep drawing of a conical part, which relates to a conical part forming device. It solves the disadvantage of deformation existing in the deep-drawing plate formed by the existing forming process, and also has the problem of relatively large impact in the process of applying pressure to the plate. The rigid binder ring (3) of the device of the present invention is arranged above the die (2), has a groove in the rigid binder ring (3), and the flexible support ring (5) is located in the groove, and the die (2) ) is arranged above the fluid medium cavity (1), and the liquid injection hole (9) is connected with the hydraulic system. The present invention also reduces the deep-drawing deformation of the plate, and can buffer the pressure during the process of applying pressure to the plate, reducing the impact on the plate. The large conical part avoids the rupture of the suspended area of the conical part during liquid-filled deep drawing, which saves procedures, reduces costs and improves efficiency.
Description
Technical field
The present invention relates to the device that taper piece filling liquid and drawing deep shaping suspension area breaks.
Background technology
In the sheet material forming processing, for the plate material parts of the ratio of height to diameter consistent with the punch geomery greater than 1 that be shaped, common pull and stretch is difficult to once-forming.Usually adopt fluid to come assist formation processing at present as the power transmission medium, its principle is to make the sheet material punch that reclines under the effect of fluid back pressure power, the back pressure effect strengthens the friction effect of blank and punch, form useful frictional force, can offset the part tension of punch-nose angle place blank, improve the bearing capacity of distortion blank, thereby avoid breaking of punch-nose angle place material, realize that plate material parts is shaped.With the fluid be the plate material parts liquid filling deep-drawing forming technology of power transmission medium with its craft flexibility height, molding is simple, the formation of parts quality is good etc., and advantage is paid attention to day by day widely, can overcome the deficiency of conventional drawing mode, be particluarly suitable for the big complicated plate material parts of in-process shaping deflection one.After this technology was come out, larger ratio of height to diameter, profile complicated parts be applied in the manufacturing industry such as aviation, automobile, electronic product.In recent years, along with the development of high-pressure hydraulic and relevant control technology, be that the sheet material forming technology of power transmission medium has obtained extensive use at home and abroad and has been able to fast development with the fluid.Because many new materials are subjected to the constraint of sheet material forming performance and forming technique itself, the Tapered Cup big for ratio of height to diameter, that cone angle is big adopts the hydro-mechanical drawing of rigid blank holder device can form bigger suspension area in forming process.Apply certain pressure-pad-force at blank holder, the pull and stretch punch carries out pull and stretch downwards with certain speed, carries out liquid filling deep-drawing forming under the effect of the back pressure in liquid chamber (die), forms suspension area.Because without any support, suspension area is burst under hydraulic action easily, so the back pressure size that applies is restricted, and will overcome breaking of fillet place, punch bottom during Tapered Cup Drawing, needs bigger back pressure.So for avoiding suspension area to break will reducing back pressure and break and need to increase back pressure the two produces contradiction for overcoming the punch-nose angle place, the back pressure size that applies is restricted, and still can't realize deeply or the big part forming of cone angle at a procedure.Processing cost increases, the process-cycle prolongation and the multi-pass shaping not only causes, and the accumulation of multiple tracks shaping, influences the uniformity of part wall thickness, can't satisfy the requirement of Aeronautics and Astronautics field particular service requirement to aspects such as part wall thickness, aerodynamic properties.
Based on the above, publication number is CN1903474A, open day be that the application for a patent for invention on January 31st, 2007 has proposed a kind ofly can improve employed processing unit (plant) of plate material parts forming limit and processing method, but there is the drawback of distortion in the sheet material of the processing unit (plant) drawing and forming described in the literary composition, and also has bigger impact in to the course of exerting pressure of sheet material.
Summary of the invention
The drawback of the distortion that the present invention exists for the sheet material that solves existing forming technique drawing and forming, and the problem of the impact that also existence is bigger in to the course of exerting pressure of sheet material, prevent the device that suspension area breaks when providing a kind of taper piece filling liquid and drawing deep to be shaped, the concrete technical scheme that addresses the above problem is as follows:
The present invention prevents the device that suspension area breaks, it comprises fluid media (medium) cavity 1, die 2, rigid blank holder circle 3, punch 4 and flexible support ring 5, die 2 is arranged on the top of fluid media (medium) cavity 1, the lower plane of die 2 is fixedlyed connected with the last plane of fluid media (medium) cavity 1, rigid blank holder circle 3 is located at the top of die 2, ring has groove in the rigid blank holder circle 3, flexible support ring 5 is located in the groove, sheet material blank 6 is placed between rigid blank holder circle 3 and the die 2, the upper surface center of fluid media (medium) cavity 1 has the dielectric cavity 8 of mouth, the lower left of fluid media (medium) cavity 1 is provided with the liquid injection hole 9 that communicates with dielectric cavity 8, and liquid injection hole 9 is communicated with hydraulic system.
Adopt device of the present invention to carry out the method that the hydro-mechanical drawing Tapered Cup is shaped, the step of this method is as follows:
The present invention is because the auxiliary liquid filling deep-drawing forming of flexible support ring, under the supporting role of flexible support ring 5, allow to apply bigger back pressure and carry out hydro-mechanical drawing, bigger back pressure makes blank flange district lower surface form lubricating oil film, reduce the friction of 2 of blank and dies, blank surface is adequately protected, and formation of parts is difficult for scratching, and improves surface quality of workpieces; The fluid lubrication in blank flange district reduces the radially tension of distortion blank, avoids breaking of fillet place, pull and stretch part bottom, has improved forming limit, has improved the uniformity of part wall thickness; The present invention carries out Tapered Cup to aluminium alloy AL1100 material and is shaped, and buffer brake can be brought up to 25Mpa by 15Mpa, and diameter is 100mm, the Tapered Cup semi-cone angle has been brought up to 15 ° by 8 °, part pastes mould, shape stability is good, and buffer brake unloading back resilience is little, formation of parts precision height; The present invention has also reduced the sheet material deep-drawing deformation, and can cushion in to the course of exerting pressure of sheet material and exert pressure, and has reduced the impact to sheet material.Realize a Tapered Cup that procedure drawing and forming ratio of height to diameter is big, semi-cone angle is big, significantly saved operation, reduce cost, improved production efficiency.
Description of drawings
Fig. 1 is the schematic diagram of forming axis symmetric pyramid part of the present invention, and Fig. 2 is the schematic diagram of the nonaxisymmetrical half-cone part of the specific embodiment sixty percent shape.
The specific embodiment
The specific embodiment one: describe present embodiment in conjunction with Fig. 1.Present embodiment is by fluid media (medium) cavity 1, die 2, rigid blank holder circle 3, punch 4 and flexible support ring 5 are formed, die 2 is arranged on the top of fluid media (medium) cavity 1, the lower plane of die 2 is fixedlyed connected with the last plane of fluid media (medium) cavity 1, rigid blank holder circle 3 is located at the top of die 2, ring has groove in the rigid blank holder circle 3, flexible support ring 5 is located in the groove, flexible support ring 5 adopts the polyurethane rubber material, sheet material blank 6 is placed between rigid blank holder circle 3 and the die 2, the upper surface center of fluid media (medium) cavity 1 has the dielectric cavity 8 of mouth, the lower left of fluid media (medium) cavity 1 is provided with the liquid injection hole 9 that communicates with dielectric cavity 8, and liquid injection hole 9 is connected with hydraulic system.
The shape of flexible support ring 5 is according to the shaped design of Tapered Cup.
The specific embodiment two: describe present embodiment in conjunction with Fig. 1.All be provided with the endoporus that passes through for punch 4 on the die 2 of present embodiment and the flexible support ring 5, the maximum outside diameter of described punch 4 is less than the internal orifice dimension of rigid blank holder circle 3 and die 2.Moving up and down of punch 4 of assurance carried out pull and stretch.
The specific embodiment three: describe present embodiment in conjunction with Fig. 1.Die 2 internal orifice dimensions of present embodiment and the difference in size of punch 4 maximum outside diameters are greater than the thickness of shaped sheet blank 6.When making sheet material blank 6 be pressed in the die 2 and do not break.
The specific embodiment four: describe present embodiment in conjunction with Fig. 1.The internal taper hole of the flexible support ring 5 of present embodiment is identical with the tapering of punch 4.Punch 4 by the time it is carried out even radial compression, it is moved in rigid blank holder circle 3 inner groovies.
In the practical operation, the difference in size that only needs control punch 4 external diameters and die 2 internal orifice dimensions is that 1.1 times of desire shaping panel thickness get final product, and this numerical value also can be bigger or smaller certainly, can both realize purpose of the present invention.
The specific embodiment five: describe present embodiment in conjunction with Fig. 1.Present embodiment also contains sealing ring 7, and sealing ring 7 is located at the lower plane and the inboard, fluid media (medium) cavity 1 upper end of die 2.
The specific embodiment six: describe present embodiment in conjunction with Fig. 2.The endoporus of the flexible support ring 5 of present embodiment is nonaxisymmetrical half-cone part.
The specific embodiment seven: the step of present embodiment manufacturing process is as follows:
The effect that flexible support ring 5 plays the blank suspension area between flanging and rigidity of support blank holder 3 and the punch 4 is set in the groove of rigid blank holder circle 3, avoids wrinkling and break;
The specific embodiment eight: the difference of the present embodiment and the specific embodiment six is that the buffer brake P in the step 4 is 20Mpa.
Avoiding producing in the gap of sheet material blank 6 between punch 4 and rigid blank holder circle 3 the suspension area bulging breaks; From the back pressure in the fluid media (medium) cavity volume sheet material blank 6 tightly is attached on the punch 4, between punch and blank, has set up useful friction; Blank 6 flange districts set up fluid lubrication under certain pressure-pad-force effect, reduce radially tension, avoid blank in punch 4 bottom drawing cracks.Above-mentioned factor can improve the forming limit of nonaxisymmetrical half-cone plate material parts, avoids that bulging breaks under the effect of suspension area back pressure.For the part that needs multi-pass to be shaped, significantly save operation, reduce cost.
The operation principle of this device:
This device is installed on the hydraulic press, and the punch 4 in the hydraulic press master slider jockey drives it and moves downward, and carries out pull and stretch; The endoporus of flexible support ring 5 is suitable with punch 4 profiles, passes the endoporus of flexible support ring 5 during the descending pull and stretch of punch 4, and it is carried out radial compression, and endoporus enlarges and gradually to the groove expansion of rigid blank holder circle 5 inside; The hydraulic press blankholder slide is connected with rigid blank holder circle 3, and to apply pressure-pad-force, the lower left of fluid media (medium) cavity 1 has the liquid hand-hole 9 that communicates with dielectric cavity 10, and liquid hand-hole 9 is connected the enforcement of controlling back pressure with hydraulic system.
Claims (7)
1, taper piece filling liquid and drawing deep prevents the device that suspension area breaks when being shaped, it comprises fluid media (medium) cavity (1), die (2), rigid blank holder circle (3), punch (4) and flexible support ring (5), die (2) is arranged on the top of fluid media (medium) cavity (1), the lower plane of die (2) is fixedlyed connected with the last plane of fluid media (medium) cavity (1), rigid blank holder circle (3) is located at the top of die (2), sheet material blank (6) is placed between rigid blank holder circle (3) and the die (2), the upper surface center of fluid media (medium) cavity (1) has the dielectric cavity (8) of mouth, the lower left of fluid media (medium) cavity (1) is provided with the liquid injection hole (9) that communicates with dielectric cavity (8), liquid injection hole (9) is communicated with hydraulic system, it is characterized in that: ring has groove in the described rigid blank holder circle (3), and flexible support ring (5) is located in the groove.
Prevent the device that suspension area breaks when 2, taper piece filling liquid and drawing deep according to claim 1 is shaped, it is characterized in that die (2) and flexible support ring (5) are provided with the endoporus that passes through for punch (4), the maximum outside diameter of described punch (4) is less than the internal orifice dimension of rigid blank holder circle (3) and die (2).
Prevent the device that suspension area breaks when 3, taper piece filling liquid and drawing deep according to claim 1 is shaped, it is characterized in that the thickness of the difference in size of die (2) internal orifice dimension and punch (4) maximum outside diameter greater than shaped sheet blank (6).
Prevent the device that suspension area breaks when 4, taper piece filling liquid and drawing deep according to claim 1 is shaped, it is characterized in that the internal taper hole of flexible support ring (5) is identical with the tapering of punch (4).
Prevent the device that suspension area breaks when 5, taper piece filling liquid and drawing deep according to claim 1 is shaped, it is characterized in that it also includes sealing ring (7), sealing ring (7) is located at the inboard, upper end of the lower plane and the fluid media (medium) cavity (1) of die (2).
Prevent the device that suspension area breaks when 6, taper piece filling liquid and drawing deep according to claim 1 is shaped, the endoporus that it is characterized in that flexible support ring (5) is nonaxisymmetrical half-cone part.
Prevent the device that suspension area breaks when 7, taper piece filling liquid and drawing deep according to claim 1 is shaped, it is characterized in that flexible support ring (5) adopts elastomeric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101443562A CN100537074C (en) | 2007-09-24 | 2007-09-24 | A device for preventing the breakage of the suspended area during the liquid-filled deep drawing of the conical part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101443562A CN100537074C (en) | 2007-09-24 | 2007-09-24 | A device for preventing the breakage of the suspended area during the liquid-filled deep drawing of the conical part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101147940A CN101147940A (en) | 2008-03-26 |
| CN100537074C true CN100537074C (en) | 2009-09-09 |
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| CNB2007101443562A Expired - Fee Related CN100537074C (en) | 2007-09-24 | 2007-09-24 | A device for preventing the breakage of the suspended area during the liquid-filled deep drawing of the conical part |
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| CN101318205B (en) * | 2008-06-24 | 2010-06-02 | 南京航空航天大学 | Circumferential natural pressurized sheet metal liquid-filled deep drawing method and equipment |
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| CN102601203A (en) * | 2012-03-23 | 2012-07-25 | 哈尔滨工业大学 | Device for improving plate forming limit and method for improving plate forming limit by aid of device |
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| CN111085594B (en) * | 2020-01-12 | 2021-09-10 | 哈尔滨理工大学 | Coordination control method for liquid chamber pressure and variable blank holder pressure in hydromechanical drawing process |
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| CN112916640B (en) * | 2021-02-10 | 2022-01-07 | 哈尔滨工业大学 | A method and forming die set for forming metal step parts using viscous medium |
| CN113145716B (en) * | 2021-03-25 | 2022-10-25 | 哈尔滨工业大学 | A two-piece one-mold forming method for mutually symmetrical features |
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