CN107081400A - A kind of mould for hollow blank backward extrusion hollow object - Google Patents
A kind of mould for hollow blank backward extrusion hollow object Download PDFInfo
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- CN107081400A CN107081400A CN201710516964.5A CN201710516964A CN107081400A CN 107081400 A CN107081400 A CN 107081400A CN 201710516964 A CN201710516964 A CN 201710516964A CN 107081400 A CN107081400 A CN 107081400A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 45
- 239000007787 solid Substances 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 230000008685 targeting Effects 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention relates to a kind of mould for hollow blank backward extrusion hollow object, including lower mould, upper mould two parts, it is characterized in that the punch-pin of part of the upper die is made up of solid punch and movable punch, flash gutters are provided with solid punch, and type groove is closed with movable punch formation, to accommodate the overlap produced in the gap between solid punch and movable punch；The present invention can enough complete backward extrusion, Upsetting extruding two procedures in same mold；Its flash gutters improves mould flexibility ratio and reliability, realizes the figuration manufacture of the different size hole hollow objects in bottom, enhances mould versatility, improve production efficiency, reduce production cost.
Description
Technical field
The invention belongs to metal material extrusion die, more particularly to a kind of section of the bottom with centre bore that be mainly used in is
Circular, many circles, square, rectangular hollow object reverse extrusion figuration manufacture, it is adaptable to metal material it is cold, warm, be hot extruded into
Shape.
Background technology
One of extrusion process, the technique processed as non-ferrous metal, ferrous materials production with part forming, it is modern age metal
A kind of advanced manufacture method in plastic working.As the extruding of further plastic working, it is mainly used in the production of part.Backward extrusion
The hollow parts that manufacture section is circle, multi-layer circular, square, rectangle etc. are primarily adapted for use in, relatively broad open has been obtained
Hair and application.
The hollow object of centre bore is carried for bottom, traditional handicraft is machining base apertures after solid blank backward extrusion.
And solid blank backward extrusion method, for large-size workpiece, its plastic force is big, have impact on die life and forming accuracy；Bottom
Deflection is small, causes workpiece bottom performance relatively low；It is also desirable to follow-up machining process.
Solved the above problems to overcome, the hollow object of centre bore is carried for bottom, has researched and proposed that hollow blank is counter to be squeezed
Pressure method." a kind of labor-saving automobile hub forming method and device (CN1864915A) ", a kind of " footpath disclosed in Chinese patent
To-reversely Compound Extrusion shaping magnesium alloy heavy burden wheel disc technique and device (2015102017001) " in have been mentioned and apply.
However, for using hollow object of the hollow blank backward extrusion method contoured bottom with centre bore, traditional structure of extrusion is
Its requirement can not be met, it is also difficult to reach above-mentioned Expected Results.
At present, the mould applied to hollow blank backward extrusion, mainly there is two kinds of structures.One kind is convex using monoblock type
Non-movable mandrel, " a kind of labor-saving automobile hub forming method and device as disclosed in Chinese patent are carried in mould, or punch-pin
(CN1864915A) building mortion " being related to, that is, employ this kind of structure.And another is using convex with being servo-actuated in punch-pin
Mould, the building mortion that as disclosed in Chinese patent (2015102017001) are related to employs this kind of structure.
In use, discovery is primarily present problems with to above two mould：
(1) solid punch with inactive mandrel is used, cavity plate height is added and mould closes height, be stripped after shaping
Difficult with pickup, the timing of press open height one, institute's energy formed hollow part length is restricted；
(2) using the solid punch for being set with servo-actuated punch-pin, due to there is gap between solid punch and movable punch, easily
Produce overlap and occur clamping stagnation, directly affects the flexibility ratio and reliability of mould, have impact on the continuity and efficiency of work；
(3) indirect-extrusion mould of both forms, when mandrel (or servo-actuated punch-pin) size is determined, it is impossible to change workpiece bottom
Portion's central hole size, mould poor universality, low production efficiency, production cost is high.
The content of the invention
The purpose of the present invention is intended to give full play to the advantage of hollow blank extrusion forming method, overcomes prior art and presence
Deficiency, propose it is a kind of with improve the flexibility ratio, versatility and reliability of mould be used for hollow blank backward extrusion it is hollow
The mould of part.
To achieve the above object, the technical scheme is that：
A kind of mould for hollow blank backward extrusion hollow object, including lower mould, upper mould two parts；Wherein：Lower mould
Part is made up of lower template 1, push rod 2, jacking block 3, cavity plate 4；The cavity plate is located on lower template, by screw, pin with
Template is connected, and push rod is placed in lower template, and jacking block is placed in cavity plate, in lower template；Part of the upper die is by cope plate 8, backing plate 7, convex
Mould, cover plate 9 are constituted；It is characterized in：The punch-pin is made up of solid punch 6 and movable punch 5, and the solid punch is located at pad
Under plate, cope plate, it is connected by screw, pin and cope plate with backing plate, movable punch is placed in solid punch, cover plate passes through
Screw, pin and movable punch are connected；Wherein：
● solid punch is retracted together with movable punch, and hollow blank 10 is placed in mould,First, backward extrusion workpiece 11, then, then Upsetting squeezes Forming Workpiece 12；
● during backward extrusion, movable punch is actively ejected, and is placed in hollow blank endoporus, the bottom surface and top of its movable punch
Block upper surface is contacted, now, the shaping of solid punch backward extrusion hollow blank；
● when Upsetting is extruded into shape, movable punch is retracted, and the bottom surface of its movable punch is concordant with solid punch bottom surface；Solid punch
Upsetting squeezes hollow blank shaping, the i.e. hole of workpiece 11 and reduced together with movable punch；
●Upsetting is squeezedAfter the completion of shaping, solid punch is retracted together with movable punch；
● the workpiece 12 for taking Upsetting to be extruded into shape is pushed up by push rod 2 and jacking block 3；
It is characterized in：It is additionally included in the solid punch and is provided with flash gutters, and type groove is closed with movable punch formation,
To accommodate the overlap produced in the gap between solid punch and movable punch；The determination of its flash gutters key dimension：
B1=H5- (10~20) mm；
H1=(2~5) mm；
Wherein：The length of flash gutters is that b1, depth are that h1, fillet are R.
It is characterized in：The movable punch, which is divided into working portion and targeting part, solid punch, is provided with suit activity
The cavity of punch-pin, the determination of its solid punch and movable punch key dimension：
D3=d5；D3=d- (2~10) mm；H3=H+ (5~10) mm；D4=d6；
If workpiece bottom centre bore dia is larger, it is not necessary to which follow-up Upsetting squeezes process, then the working portion of movable punch is straight
Footpath d3=d1；
If workpiece bottom centre bore dia is smaller, follow-up Upsetting is needed to squeeze the work department of process, then movable punch after extruding
Divide length H3=H5；
Wherein：A diameter of d3 of the working portion of movable punch, the working portion length of movable punch are H3, movable punch
The a diameter of d4 of targeting part；The fit diameter of the cavity of solid punch and the working portion of movable punch is d5, length of fit
For H5, the cavity of solid punch and the targeting part fit diameter d6 of movable punch.
The present invention compared with the prior art, its substantive technical characterstic and significantly has the technical effect that：
Backward extrusion, Upsetting extruding two procedures can be completed in same mold, can realize that the different size holes in bottom are hollow
The figuration manufacture of part, enhances mould versatility, improves production efficiency, reduce production cost；
Flash gutters are set on solid punch, overlap produced by there is gap easily is solved between solid punch and movable punch
And the problem of occur clamping stagnation, improve mould flexibility ratio and reliability；
Movable punch is employed, cavity plate height is reduced and mould closes height, be easy to the demoulding and pickup, in same press
The hollow object of upper formable larger lengths.
Brief description of the drawings
Fig. 1 is the hollow blank indirect-extrusion mould schematic diagram of the present invention；
Fig. 2 is the mould schematic diagram of the hollow blank backward extrusion and Upsetting extruding of the present invention；
Fig. 3 is solid punch and flash gutters schematic diagram；
Fig. 4 is movable punch schematic diagram.
Fig. 5 is hollow object reverse extrusion process schematic representation；
Fig. 6 is Upsetting extruding process schematic diagrames after hollow object reverse extrusion；
Embodiment
Embodiment is described in detail below in conjunction with accompanying drawing (the present embodiment be to the present invention furtherly
It is bright, rather than to any restriction of the invention made).
Shown in Fig. 1 and Fig. 2, a kind of mould for hollow blank backward extrusion hollow object of the invention, including lower mould, on
Mould two parts；Wherein：Part of the lower die is made up of lower template 1, push rod 2, jacking block 3, cavity plate 4；The cavity plate is located on lower template,
Connected by screw, pin and lower template, push rod is placed in lower template, jacking block is placed in cavity plate, in lower template；Part of the upper die by
Cope plate 8, backing plate 7, punch-pin, cover plate 9 are constituted；It is characterized in：The punch-pin is made up of solid punch 6 and movable punch 5, institute
Solid punch is stated under backing plate, cope plate, is connected by screw, pin and cope plate with backing plate, movable punch is placed in solid
Determine in punch-pin, cover plate is connected by screw, pin and movable punch.The movable punch motion and position can be controlled.
Shown in Fig. 2, the mould schematic diagram that hollow blank backward extrusion of the invention is extruded with Upsetting；The mould of the present invention, it is hollow
The contoured squeeze process of part includes：Backward extrusion is extruded with Upsetting.Wherein：
● solid punch is retracted together with movable ejector die, and hollow blank 10 is placed in mould, first, backward extrusion work
Part 11, then, then Upsetting squeezes Forming Workpiece 12；Backward extrusion, Upsetting are completed in same mold and squeezes two procedures；
● during backward extrusion, movable punch is actively ejected, and is placed in hollow blank endoporus, the bottom surface and top of its movable punch
Block upper surface is contacted, now, the shaping of solid punch backward extrusion hollow blank；
● when Upsetting is extruded into shape, movable punch is retracted, and the bottom surface of its movable punch is concordant with solid punch bottom surface；Solid punch
Upsetting squeezes hollow blank shaping, the i.e. hole of workpiece 11 and reduced together with movable punch；
● Upsetting is extruded into after the completion of shape, and solid punch is retracted together with movable punch；
● the workpiece 12 for taking Upsetting to be extruded into shape is pushed up by push rod 2 and jacking block 3；
Shown in Fig. 3, flash gutters are provided with the solid punch, and type groove is closed with movable punch formation, to hold
Receive the overlap produced in the gap between solid punch and movable punch；The determination of its flash gutters key dimension：
B1=H5- (10~20) mm；
H1=(2~5) mm；
Wherein：The length of flash gutters is that b1, depth are that h1, fillet are R.
Shown in Fig. 4, the movable punch is divided into working portion and targeting part, solid punch that to be provided with suit activity convex
The cavity of mould, the determination of its solid punch and movable punch key dimension：
D3=d5；D3=d- (2~10) mm；H3=H+ (5~10) mm；- d4=d6；
If workpiece bottom centre bore dia is larger, it is not necessary to which follow-up Upsetting squeezes process, then the working portion of movable punch is straight
Footpath d3=d1；
If workpiece bottom centre bore dia is smaller, follow-up Upsetting is needed to squeeze the work department of process, then movable punch after extruding
Divide length H3=H5；
Wherein：A diameter of d3 of the working portion of movable punch, the working portion length of movable punch are H3, movable punch
The a diameter of d4 of targeting part；The fit diameter of the cavity of solid punch and the working portion of movable punch is d5, length of fit
For H5, cavity and the movable punch targeting part fit diameter d6 of solid punch.
For example：According to inventive die and relative dimensions design determination method, determine movable punch, solid punch it is main
Size is as follows：
(1) bottom centre's bore dia 260mm, the working portion diameter d3 of movable punch is taken as 260mm, i.e. d3=d1, long
Degree H3 is taken as 150mm, i.e. H3=H+10mm；The targeting part diameter d4 of movable punch is taken as 120mm；
(2) the fit diameter d5 of the working portion of solid punch and movable punch is taken as 260mm, i.e. d5=d3, length H3
150mm is taken as, the targeting part fit diameter 120mm with movable punch；
(3) flash gutters are provided with solid punch, overlap slot length b1 is taken as 130mm, and overlap groove height h1 is taken as 3mm.
Shown in Fig. 5, it is a kind of application of mould for hollow blank backward extrusion hollow object of the invention, is hollow object
Reverse extrusion process schematic representation.I.e. by internal diameter be d, external diameter is D, is highly H hollow blank 10, and extrusion molding is bottom centre
Bore dia is d1 workpiece 11.Workpiece 11 bottom centre bore dia 260mm, hollow blank 10 external diameter 420mm, internal diameter 270mm are high
Spend 140mm.
Shown in Fig. 6, it is a kind of application of mould for hollow blank backward extrusion hollow object of the invention, is hollow object
Upsetting extruding process schematic diagram after reverse extrusion.I.e. by internal diameter be d, external diameter is D, is highly H hollow blank 10, and first extrusion molding is
Bottom centre's bore dia is d1 workpiece 11, and rear Upsetting squeezes the workpiece 12 for being configured to that bottom centre's bore dia is d2.The bottom of workpiece 12
Center-hole diameter 140mm, hollow blank 10 external diameter 420mm, internal diameter 270mm, height 140mm.
Claims (3)
1. a kind of mould for hollow blank backward extrusion hollow object, including lower mould, upper mould two parts；Wherein：Lower mold portion
Divide and be made up of lower template (1), push rod (2), jacking block (3), cavity plate (4)；The cavity plate is located on lower template, passes through screw, pin
Nail is connected with lower template, and push rod is placed in lower template, and jacking block is placed in that cavity plate is interior, in lower template；Part of the upper die by cope plate (8),
Punch-pin, backing plate (7), cover plate (9) composition；It is characterized in that:The punch-pin is made up of solid punch (6) and movable punch (5)
, the solid punch is connected, movable punch is put under backing plate, cope plate by screw, pin and cope plate with backing plate
In in solid punch, cover plate is connected by screw, pin and movable punch；Wherein：
● solid punch is retracted together with movable punch, and hollow blank (10) is placed in mould, first, backward extrusion workpiece
(11), then, then Upsetting squeeze Forming Workpiece (12)；
● during backward extrusion, movable punch is actively ejected, and is placed on hollow blank endoporus, the bottom surface and jacking block of its movable punch
End contact, now, the shaping of solid punch backward extrusion hollow blank；
● when Upsetting is extruded into shape, movable punch is retracted, and the bottom surface of its movable punch is concordant with solid punch bottom surface；Solid punch and work
The crowded hollow blank shapings of Upsetting together of dynamic punch-pin, i.e. the hole of workpiece (11) reduces；
● Upsetting is extruded into after the completion of shape, and solid punch is retracted together with movable punch；
● the workpiece (12) for taking Upsetting to be extruded into shape is pushed up by push rod (2) and jacking block (3).
2. a kind of mould for hollow blank backward extrusion hollow object according to claim 1, it is characterised in that:Also
Be included in the solid punch and be provided with flash gutters, and with movable punch formation closure type groove, to accommodate solid punch with
The overlap produced in gap between movable punch；The determination of its flash gutters key dimension：
B1=H5- (10~20) mm；
H1=(2~5) mm；
Wherein：The length of flash gutters is that b1, depth are that h1, fillet are R.
3. a kind of mould for hollow blank backward extrusion hollow object according to claim 1, it is characterised in that:Institute
State movable punch and be divided into the cavity that suit movable punch is provided with working portion and targeting part, solid punch, its fixation is convex
The determination of mould and movable punch key dimension：
D3=d5；
D3=d- (2~10) mm；
H3=H+ (5~10) mm；
D4=d6；
If workpiece bottom centre bore dia is larger, it is not necessary to which follow-up Upsetting squeezes the working portion diameter d3 of process, then movable punch
=d1.
If workpiece bottom centre bore dia is smaller, follow-up Upsetting is needed to squeeze process after extruding, then the working portion of movable punch is long
Spend H3=H5；
Wherein：The a diameter of d3 of working portion of movable punch, the working portion length of movable punch are H3, the guiding of movable punch
Section diameter is d4；The cavity of solid punch and the working portion fit diameter of movable punch are that d5, length of fit are H5, fixed
The cavity of punch-pin and the targeting part fit diameter of movable punch are d6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710516964.5A CN107081400B (en) | 2017-06-29 | 2017-06-29 | A kind of mold for hollow blank backward extrusion hollow object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710516964.5A CN107081400B (en) | 2017-06-29 | 2017-06-29 | A kind of mold for hollow blank backward extrusion hollow object |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107081400A true CN107081400A (en) | 2017-08-22 |
| CN107081400B CN107081400B (en) | 2018-09-25 |
Family
ID=59606598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710516964.5A Expired - Fee Related CN107081400B (en) | 2017-06-29 | 2017-06-29 | A kind of mold for hollow blank backward extrusion hollow object |
Country Status (1)
| Country | Link |
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| CN (1) | CN107081400B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927417A (en) * | 2018-05-24 | 2018-12-04 | 北京航星机器制造有限公司 | The hot-pressed mold of abnormity depth chamber labyrinth bracket and manufacturing process |
| CN108941980A (en) * | 2018-08-16 | 2018-12-07 | 中国兵器工业第五九研究所 | A kind of almag casting welding wire preparation method |
| CN109079074A (en) * | 2018-08-16 | 2018-12-25 | 湘潭大学 | A kind of plate forging forming method and its mold that metalwork bottom thickens |
| CN112453092A (en) * | 2020-11-14 | 2021-03-09 | 中国兵器科学研究院宁波分院 | Integral extrusion forming die and method for thin-wall shell with inner ring rib |
| CN115041536A (en) * | 2022-08-16 | 2022-09-13 | 中北大学 | Extrusion forming die and method for conical cabin with end frame |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5699040A (en) * | 1980-01-14 | 1981-08-10 | Suzuki Motor Co Ltd | Die for manufacturing flanged hollow product |
| JPS6040642A (en) * | 1983-08-12 | 1985-03-04 | Sakamura Seiatsu Kk | Manufacture of middle recessed hollow cylinder |
| JPH0691339A (en) * | 1992-09-14 | 1994-04-05 | Nagoya Giken Kogyo Kk | Method for cold-heading formed product for joint metallic fixture |
| CN1864915A (en) * | 2006-06-13 | 2006-11-22 | 中北大学 | A labor-saving automobile hub forming method and device |
| CN101332476A (en) * | 2008-08-01 | 2008-12-31 | 河南科技大学 | Precise extrusion molding method of thin wall long-pipe shaped parts bland and special mould |
| CN101829698A (en) * | 2010-03-30 | 2010-09-15 | 河南科技大学 | Extrusion forming process of thin-wall long pipe-shaped part blank with flange and mould |
| CN104874626A (en) * | 2015-04-24 | 2015-09-02 | 中北大学 | Process and device for forming magnesium alloy loading wheel disc through combined extruding in radial direction and reverse direction |
-
2017
- 2017-06-29 CN CN201710516964.5A patent/CN107081400B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5699040A (en) * | 1980-01-14 | 1981-08-10 | Suzuki Motor Co Ltd | Die for manufacturing flanged hollow product |
| JPS6040642A (en) * | 1983-08-12 | 1985-03-04 | Sakamura Seiatsu Kk | Manufacture of middle recessed hollow cylinder |
| JPH0691339A (en) * | 1992-09-14 | 1994-04-05 | Nagoya Giken Kogyo Kk | Method for cold-heading formed product for joint metallic fixture |
| CN1864915A (en) * | 2006-06-13 | 2006-11-22 | 中北大学 | A labor-saving automobile hub forming method and device |
| CN101332476A (en) * | 2008-08-01 | 2008-12-31 | 河南科技大学 | Precise extrusion molding method of thin wall long-pipe shaped parts bland and special mould |
| CN101829698A (en) * | 2010-03-30 | 2010-09-15 | 河南科技大学 | Extrusion forming process of thin-wall long pipe-shaped part blank with flange and mould |
| CN104874626A (en) * | 2015-04-24 | 2015-09-02 | 中北大学 | Process and device for forming magnesium alloy loading wheel disc through combined extruding in radial direction and reverse direction |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927417A (en) * | 2018-05-24 | 2018-12-04 | 北京航星机器制造有限公司 | The hot-pressed mold of abnormity depth chamber labyrinth bracket and manufacturing process |
| CN108941980A (en) * | 2018-08-16 | 2018-12-07 | 中国兵器工业第五九研究所 | A kind of almag casting welding wire preparation method |
| CN109079074A (en) * | 2018-08-16 | 2018-12-25 | 湘潭大学 | A kind of plate forging forming method and its mold that metalwork bottom thickens |
| CN112453092A (en) * | 2020-11-14 | 2021-03-09 | 中国兵器科学研究院宁波分院 | Integral extrusion forming die and method for thin-wall shell with inner ring rib |
| CN115041536A (en) * | 2022-08-16 | 2022-09-13 | 中北大学 | Extrusion forming die and method for conical cabin with end frame |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107081400B (en) | 2018-09-25 |
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Granted publication date: 20180925 |