CN103447431A - Method for improving forming uniformity of flat die forging - Google Patents
Method for improving forming uniformity of flat die forging Download PDFInfo
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- CN103447431A CN103447431A CN2013102136073A CN201310213607A CN103447431A CN 103447431 A CN103447431 A CN 103447431A CN 2013102136073 A CN2013102136073 A CN 2013102136073A CN 201310213607 A CN201310213607 A CN 201310213607A CN 103447431 A CN103447431 A CN 103447431A
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- 238000005242 forging Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 82
- 230000006872 improvement Effects 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims description 22
- 238000012545 processing Methods 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000009497 press forging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 13
- 230000009471 action Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000278713 Theora Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
The invention relates to a method for improving the forming uniformity of flat die forging, which mainly performs pre-forming forging on a metal blank (target) by using a conical die set to eliminate a dead metal area at the central part of the metal blank, and then uses a flat die to forge and press the metal blank to the final size of the metal blank. The method of the invention makes the plastic flow of the whole metal blank tend to be average, reduces the barrel shape phenomenon and achieves the effects of grain refinement and great improvement of uniformity.
Description
Technical field
The invention relates to a kind of flat-die forging forming method, especially a kind of method of improving the flat-die forging and molding uniformity, it is by metal targets or the crude green body of other metal block materials, the forming mode forged with the circular cone module is eliminated the emptying aperture of crude green body, and can reach the purpose of grain refinement and homogenising.
Background technology
The pluses and minuses of the materials processing technology of following schematic illustration several types:
1, Equal Channel Angular Pressing forming process (EqualChannelAngularExtrusion)-for metal stock being done in passage repeatedly to extruding, can make more refinement of grain structure, but the metal stock external form is elongated, and production economy is not good.
2, the grain structure refinement of roll forming-use the method processing is easier to, but directionality is more obvious, therefore must control every time rolling direction, and stock utilization is low, so production economy is also not good.
3, flat-die forging and molding method, to forge processing, is the forming technique that the mankind use the earliest, and on the complexity of finished form, and the kind of applicable rapidoprint, forge the applicable scope of machining all very extensively.And generally only use flat-die forging and molding method to have dead metal region (deadmetalzone), therefore the grain structure uniformity is poor, but in forming process, the Plastic Flow of material is radially, therefore than the shortcoming without the grain structure directionality, and stock utilization is high, also be applicable to producing in enormous quantities.
As shown in Figure 10 Figure 13, general flat-die forges former processing procedure and takes three forging and stamping of flat-die, and the position contacted with flat-die 5 when blank 4, the Plastic Flow of blank 4 that retrained by interface friction, so form dead metal region d (deadmetalzone), outer rim forms shear band s, and metal area d equivalent strain herein is far below other zones, crystal grain is regional large than other, especially at the position that approaches the center, interface, the Plastic Flow of material is poorer, thereby has affected the refinement of crystal grain; And because interface friction has retrained the Plastic Flow of blank 4, therefore the most violent in the plastic deformation of the upper and lower plane of symmetry of blank, although more easily reach the refinement of crystal grain at plane of symmetry central part, on the scope of freedom in the outside, form barrel-shaped x, increase the follow-up car amount of repairing, the uniformity of blank integral body is not good.
In view of this inventor, adheres to the abundant of these relevant industries for many years and designs and develops and the actual fabrication experience, for existing structure, reaches to lack to give greatly Improvement, provides a kind of method of improving the flat-die forging and molding uniformity, to reaching better practical value.
Summary of the invention
The purpose of this invention is to provide a kind of method of improving the flat-die forging and molding uniformity, by by metal targets or the crude green body of other metal block materials, eliminate the emptying aperture of crude green body with circular cone forging dies forming mode, make grain refinement and homogenising.
For this reason, the present invention proposes a kind of method of improving the flat-die forging and molding uniformity, it adopts the circular cone module to carry out the preform forging to metal stock (target), to eliminate the dead metal region of metal stock central part, then forges and presses the final size to metal stock with flat-die; With this processing mode, allow the Plastic Flow of metal stock integral body transfer toward on average, reduce barrel-shaped phenomenon, reach the effect that grain refinement and the uniformity significantly promote.
A kind of method of improving the flat-die forging and molding uniformity that the present invention proposes, comprise the following steps: first carry out blank and enter the mould step, it is that metal stock (target) is placed in the processing circular cone module that is provided with upper and lower circular cone mould; Adopt again preform at least one times to forge step, with what the metal stock pressurization is forged into to the concavity shape, partly process finished product; Thereafter, then the metal stock that will partly process state imposes flat-die and forges step, to be provided with flat plate mold, it is partly processed to finished product to be forced into default size (final size); Allow the Plastic Flow of metal stock integral body transfer toward on average, reduce barrel-shaped phenomenon, reach the effect that grain refinement and the uniformity significantly promote.
Wherein, described circular cone module can further adopt separately the circular cone mould or adopt separately lower circular cone mould to be eliminated the dead metal region of single side; Simultaneously, the upper and lower circular cone mould of circular cone module also can adopt the wherein a kind of of convex circular cone mould, spill circular cone mould, concavo-convex compound circular cone mould, pressurizes to forge to allow metal stock form recess herein.
From the above, the present invention and existing method are compared has following plurality of advantages, and details are as follows:
1, the method for the improvement flat-die forging and molding uniformity of the present invention, by utilizing this forging and stamping processing, allow the Plastic Flow of metal stock integral body transfer toward on average, reduces barrel-shaped phenomenon, reaches the effect that grain refinement and the uniformity significantly promote;
2, the method for the improvement flat-die forging and molding uniformity of the present invention, the change by the forging mold external form, to reduce the generation of shaping dead metal region, improves the uniform crystal particles degree of target, to promote sputter (transcription) quality of metal stock.
The accompanying drawing explanation
Fig. 1 is flow chart of steps of the present invention;
Fig. 2 is action schematic diagram of the present invention ();
Fig. 3 is action schematic diagram of the present invention (two);
Fig. 4 is action schematic diagram of the present invention (three);
Fig. 5 is action schematic diagram of the present invention (four);
Fig. 6 is Plastic Flow schematic diagram after metal stock of the present invention forges;
Fig. 7 is convex circular cone mould schematic diagram of the present invention;
Fig. 8 is spill circular cone mould schematic diagram of the present invention;
Fig. 9 is concavo-convex compound circular cone mould schematic diagram of the present invention;
Figure 10 is the action schematic diagram () of prior art;
Figure 11 is the action schematic diagram (two) of prior art;
Figure 12 is the action schematic diagram (three) of prior art;
Figure 13 is Plastic Flow schematic diagram after the prior art metal stock forges.
The drawing reference numeral explanation:
The 1-metal stock, the 11-recess, 2-circular cone module, the upper circular cone mould of 21-, circular cone mould under 22-, the 3-flat-die, the 4-blank, the 5-flat-die, the d-dead metal region, x-is barrel-shaped, the s-shear band.
The specific embodiment
For the effect that makes technical scheme of the present invention, goal of the invention and reach has more complete and clearly discloses, below in conjunction with accompanying drawing, be elaborated:
At first, refer to Fig. 1-6, improve flow process and the action schematic diagram of the method for the flat-die forging and molding uniformity for the present invention is a kind of, it mainly adopts circular cone module 2 to carry out the preform forging metal stock 1 (target), tapering by circular cone module 2 stresses on metal stock 1 central part, to eliminate the dead metal region of the metal stock 1 upper and lower both sides of central part, then forge and press to the final size of metal stock 1 wish processing with flat-die 3.
Circular cone module in the present invention comprises upper die and lower die, and upper die and lower die at least one be the circular cone mould.
See also Fig. 1-6, the present invention is a kind of, and to improve the step of method of the flat-die forging and molding uniformity as follows:
1, blank enters the mould-crude green body of metal stock is placed in the processing circular cone module 2 that is provided with upper circular cone mould 21 and lower circular cone mould 22;
2, preform forges-is the upper circular cone mould 21 of utilization and lower circular cone mould 22 pressurized metal blanks 1 at least one times, with the pressurization of the central part by metal stock 1 upper/lower terminal, forges the metal stock 1 of formation recess 11;
3, flat-die forges-re-uses upper and lower flat-die 3, and the metal stock 1 with recess 11 is carried out to the forging program that flat-die 3 is exerted pressure, and the metal stock 1 that will have recess 11 is forced into default size;
4, finished product-obtain after the above-mentioned procedure metal stock finished product of a tool grain refinement and the uniformity.
Above-mentioned metal stock can be target or other metal block materials.
See also Fig. 1-6, in process, at first, metal stock 1 is inserted in the processing circular cone module 2 that is provided with upper circular cone mould 21 and lower circular cone mould 22, complete blank and enter the mould step, and on it, circular cone mould 21 can further adopt convex circular cone mould or spill circular cone mould or concavo-convex compound circular cone mould to carry out preform forging step with lower circular cone mould 22, with the ora terminalis (as shown in Fig. 2-Fig. 3) with lower circular cone mould 22 forging and stamping metal stocks 1 by upper circular cone mould 21, after upper circular cone mould 21 and lower circular cone mould 22 preforms, can eliminate on metal stock 1 central part, the dead metal region of lower both sides, shear band s (Shearband) migrates to the end face at metal stock center, in above-mentioned processing circular cone module 2, be to adopt upper circular cone mould 21 and lower circular cone mould 22 to eliminate the dead metal region of the metal stock 1 upper and lower both sides of central part, yet, also can adopt separately circular cone mould 21 or adopt separately lower circular cone mould 22 to be eliminated the dead metal region of single side.
After completing preform forging step, the flat-die that carries out again flat-die 3 forging and stamping forges step, in order to upper and lower flat-die 3 forging and stamping metal stocks 1, make metal stock 1 concavity shape 11 position trends straight, make metal stock 1 reach final wish processing dimension (as shown in Fig. 4-Fig. 5); See also Fig. 6, can make the grain refinement of metal stock 1 and the uniformity significantly promote.
In addition, please consult in the lump again Fig. 7-9, when using described circular cone module, can adopt separately circular cone mould 21 or adopt separately lower circular cone mould 22 to be eliminated the dead metal region of single side; Simultaneously, in using above-mentioned accompanying drawing represented primary circle prod cast shape, the upper circular cone mould 21 of circular cone module 2 and lower circular cone mould 22 also can adopt the wherein a kind of of convex circular cone mould, spill circular cone mould, concavo-convex compound circular cone mould, and the forging metal blank pressurizes.
The foregoing is only the schematic specific embodiment of the present invention, not in order to limit scope of the present invention.Any those skilled in the art, the equivalent variations of doing under the prerequisite that does not break away from design of the present invention and principle and modification, all should belong to the scope of protection of the invention.And it should be noted that, each part of the present invention is not limited in above-mentioned overall applicability, each technical characterictic of describing in specification of the present invention can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, other combination relevant with this case inventive point and concrete application have been contained in the present invention in the nature of things.
Claims (8)
1. a method of improving the flat-die forging and molding uniformity, it is characterized in that: the method for the described improvement flat-die forging and molding uniformity is to adopt the circular cone module to carry out the preform forging metal stock, tapering by the circular cone module stresses on the metal stock central part, to eliminate the dead metal region of metal stock central part, then forge and press to the final size of metal stock wish processing with flat-die.
2. the method for the improvement flat-die forging and molding uniformity as claimed in claim 1 is characterized in that: described metal stock carries out once above circular cone module preform and forges.
3. the method for the improvement flat-die forging and molding uniformity as claimed in claim 1 or 2 is characterized in that: described circular cone module is arranged on the metal stock top position for being provided with on one circular cone mould and correspondence, to eliminate the dead metal region of metal stock central part upside.
4. the method for the improvement flat-die forging and molding uniformity as claimed in claim 1 or 2 is characterized in that: described circular cone module is arranged on the metal stock lower position for being provided with circular cone mould and correspondence, to eliminate the dead metal region of metal stock central part downside.
5. the method for the improvement flat-die forging and molding uniformity as claimed in claim 1 or 2, it is characterized in that: described circular cone module is made as upper and lower circular cone mould and correspondence is arranged on upper and lower position, to eliminate the dead metal region of the upper and lower both sides of metal stock central part.
6. the method for the improvement flat-die forging and molding uniformity as claimed in claim 1 or 2 is characterized in that: described circular cone module is the wherein a kind of of convex circular cone mould, spill circular cone mould, concavo-convex compound circular cone mould.
7. a method of improving the flat-die forging and molding uniformity, it is characterized in that: the method for the described improvement flat-die forging and molding uniformity comprises:
A, blank enter the mould-crude green body of metal stock is placed in the processing circular cone module that is provided with upper and lower circular cone mould;
B, preform forges-utilizes upper and lower circular cone mould pressurized metal blank at least one times, with the central part by the metal stock two ends, adds the metal stock that press forging forms recess;
C, flat-die forge-re-use upper and lower flat-die, with the metal stock that will have recess, carry out the forging program that flat-die is exerted pressure, and the metal stock of its recess is forced into to default size;
D, finished product-obtain after the above-mentioned procedure metal stock finished product of a tool grain refinement and the uniformity.
8. the method for the improvement flat-die forging and molding uniformity as claimed in claim 7 is characterized in that: described circular cone module is the wherein a kind of of convex circular cone mould, spill circular cone mould, concavo-convex compound circular cone mould.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101119768A TWI473674B (en) | 2012-06-01 | 2012-06-01 | Method for improvement of deformation homogeneity in flat upsetting process |
| TW101119768 | 2012-06-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103447431A true CN103447431A (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102136073A Pending CN103447431A (en) | 2012-06-01 | 2013-05-31 | Method for improving forming uniformity of flat die forging |
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| CN (1) | CN103447431A (en) |
| TW (1) | TWI473674B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105522093A (en) * | 2015-12-02 | 2016-04-27 | 贵州安大航空锻造有限责任公司 | Upsetting method of bearing steel cake blank |
| CN105522091A (en) * | 2015-12-02 | 2016-04-27 | 贵州安大航空锻造有限责任公司 | Upsetting method of nickel-based high-temperature alloy cake blank |
| CN105522090A (en) * | 2015-12-02 | 2016-04-27 | 贵州安大航空锻造有限责任公司 | Upsetting method of alpha-beta-phase titanium alloy cake blank |
| CN105522092A (en) * | 2015-12-02 | 2016-04-27 | 贵州安大航空锻造有限责任公司 | Upsetting method of cobalt-based high-temperature alloy cake blank |
| CN105537481A (en) * | 2015-12-02 | 2016-05-04 | 贵州安大航空锻造有限责任公司 | Upsetting method of cake-shaped structural steel billet |
| CN105537482A (en) * | 2015-12-02 | 2016-05-04 | 贵州安大航空锻造有限责任公司 | Upsetting method of cake-shapedstainless steel billet |
| CN105537483A (en) * | 2015-12-02 | 2016-05-04 | 贵州安大航空锻造有限责任公司 | Upsetting method of cake-shapedbeta-phase titanium alloy billet |
| CN105537480A (en) * | 2015-12-02 | 2016-05-04 | 贵州安大航空锻造有限责任公司 | Upsetting method of aluminum alloy biscuit |
| CN105562576A (en) * | 2015-12-02 | 2016-05-11 | 贵州安大航空锻造有限责任公司 | Upsetting method for iron-based high-temperature alloy cake blank |
| CN105583339A (en) * | 2015-12-02 | 2016-05-18 | 贵州安大航空锻造有限责任公司 | Upsetting method for alpha-phase titanium alloy biscuit |
| CN108907050A (en) * | 2018-06-12 | 2018-11-30 | 湖北三环锻造有限公司 | Knuckle arm end cold-coining moulding process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58122146A (en) * | 1982-01-16 | 1983-07-20 | Kawasaki Yukou Kk | Block-forging method of bevel gear or the like |
| CN101181732A (en) * | 2007-12-20 | 2008-05-21 | 上海交通大学 | Forging method of cymbal anvil for heavy forging upsetting process |
| CN101491822A (en) * | 2009-03-12 | 2009-07-29 | 西南铝业（集团）有限责任公司 | Free-forging shortening method and anvil at ultralimit aspect ratio |
| CN101972830A (en) * | 2010-11-02 | 2011-02-16 | 武汉理工大学 | Hot upsetting process for cast ingot with large height to diameter ratio for ultra large ring forging |
-
2012
- 2012-06-01 TW TW101119768A patent/TWI473674B/en not_active IP Right Cessation
-
2013
- 2013-05-31 CN CN2013102136073A patent/CN103447431A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58122146A (en) * | 1982-01-16 | 1983-07-20 | Kawasaki Yukou Kk | Block-forging method of bevel gear or the like |
| CN101181732A (en) * | 2007-12-20 | 2008-05-21 | 上海交通大学 | Forging method of cymbal anvil for heavy forging upsetting process |
| CN101491822A (en) * | 2009-03-12 | 2009-07-29 | 西南铝业（集团）有限责任公司 | Free-forging shortening method and anvil at ultralimit aspect ratio |
| CN101972830A (en) * | 2010-11-02 | 2011-02-16 | 武汉理工大学 | Hot upsetting process for cast ingot with large height to diameter ratio for ultra large ring forging |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105522093A (en) * | 2015-12-02 | 2016-04-27 | 贵州安大航空锻造有限责任公司 | Upsetting method of bearing steel cake blank |
| CN105522091A (en) * | 2015-12-02 | 2016-04-27 | 贵州安大航空锻造有限责任公司 | Upsetting method of nickel-based high-temperature alloy cake blank |
| CN105522090A (en) * | 2015-12-02 | 2016-04-27 | 贵州安大航空锻造有限责任公司 | Upsetting method of alpha-beta-phase titanium alloy cake blank |
| CN105522092A (en) * | 2015-12-02 | 2016-04-27 | 贵州安大航空锻造有限责任公司 | Upsetting method of cobalt-based high-temperature alloy cake blank |
| CN105537481A (en) * | 2015-12-02 | 2016-05-04 | 贵州安大航空锻造有限责任公司 | Upsetting method of cake-shaped structural steel billet |
| CN105537482A (en) * | 2015-12-02 | 2016-05-04 | 贵州安大航空锻造有限责任公司 | Upsetting method of cake-shapedstainless steel billet |
| CN105537483A (en) * | 2015-12-02 | 2016-05-04 | 贵州安大航空锻造有限责任公司 | Upsetting method of cake-shapedbeta-phase titanium alloy billet |
| CN105537480A (en) * | 2015-12-02 | 2016-05-04 | 贵州安大航空锻造有限责任公司 | Upsetting method of aluminum alloy biscuit |
| CN105562576A (en) * | 2015-12-02 | 2016-05-11 | 贵州安大航空锻造有限责任公司 | Upsetting method for iron-based high-temperature alloy cake blank |
| CN105583339A (en) * | 2015-12-02 | 2016-05-18 | 贵州安大航空锻造有限责任公司 | Upsetting method for alpha-phase titanium alloy biscuit |
| CN108907050A (en) * | 2018-06-12 | 2018-11-30 | 湖北三环锻造有限公司 | Knuckle arm end cold-coining moulding process |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI473674B (en) | 2015-02-21 |
| TW201350225A (en) | 2013-12-16 |
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Application publication date: 20131218 |