CN104399801B - A kind of hole-punching method preventing high cylindrical forged piece overlap - Google Patents
A kind of hole-punching method preventing high cylindrical forged piece overlap Download PDFInfo
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- CN104399801B CN104399801B CN201410574051.5A CN201410574051A CN104399801B CN 104399801 B CN104399801 B CN 104399801B CN 201410574051 A CN201410574051 A CN 201410574051A CN 104399801 B CN104399801 B CN 104399801B
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- drift
- blank
- height
- punching
- hydraulic press
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention relates to a kind of hole-punching method preventing high cylindrical forged piece overlap, by the height of the first drift being set to the 3/4 of blank height, it is effectively increased the height of primary drying, hydraulic press drive the first drift to blank round as a ball time, upper blind hole root can obtain the support of the first drift, thus not being easily formed step, after first time punching, ensure that blank height and ejection are highly close, thus avoiding the excessive facestock caused of press drafts in the planar end surface process situation with entering endoporus formation step. Diameter at butt end 10mm��the 20mm bigger than the top diameter of the first drift of the second drift, can excise the rough bore area that first time punching causes, turn avoid the appearance of endoporus step, substantially increase punching efficiency.
Description
Technical field
The present invention relates to Forging Technology, particularly relate to a kind of hole-punching method preventing high cylindrical forged piece overlap.
Background technology
At present, high cylindrical forged piece is highly higher due to ejection, and forge is punched out frequently with the method for two-sided punching, and two-sided punching is respectively necessary for carrying out first time punching and second time punching, but is usually present situations below before second time punch process:
(1), when height of punch is too low, band rushes round as a ball, upper blind hole root, without drift support, is easily formed step under the pressure of hydraulic press.
(2) planar end surface drafts is relatively big, and under high temperature, metal fluidity is good, surface metal is easily brought into forging endoporus and forms step.
(3) top diameter of drift and the diameter at butt end difference of two punchings are too big, are easily formed step in second time punch process.
Owing to easily forming step at endoporus before above-mentioned second time punch process, cause that step is taken out of in second time punch process, thus being easily formed forging flash image, employing lancing method is typically required by flash removal for forging flash, but the contact surface after removing is comparatively coarse, follow-up rolling ring process is easily generated the defects such as folding, bark pocket, thus forming puzzlement to follow-up rolling ring process.
Summary of the invention
The applicant, for above-mentioned existing issue, has carried out Improvement, it is provided that a kind of hole-punching method preventing high cylindrical forged piece overlap, effectively eliminates forging endoporus step, it is prevented that produce finning after two-sided punching.
The technical solution adopted in the present invention is as follows:
A kind of hole-punching method preventing high cylindrical forged piece overlap, comprises the following steps:
The first step: by centrally disposed with blank for the axle center of microcephaly's drift of the first drift be coaxial, make microcephaly's drift of the first drift to blank punching by hydraulic press pressure, thus forming blind hole in one end of blank; The height of described first drift is less than blank height;
Second step: by blank overturn 90 ��, utilize hydraulic press that described blank is round as a ball, round as a ball complete after, take out the first drift;
3rd step: blank is continued upset 90 ��, makes the other end of blank upward, utilize hydraulic press that the other end of blank is carried out planar end surface;
4th step: by centrally disposed with blank for the axle center of the major part drift of the second drift be coaxial, make the major part drift of the second drift to the other end punching of blank by hydraulic press pressure, the upper blind hole in blank punched through, form through hole.
Its further technical scheme is in that:
Height is blank height the 3/4 of described first drift;
Diameter at butt end 10��the 20mm bigger than the top diameter of the first drift of described second drift;
When planar end surface process described in the 3rd step, the drafts of described hydraulic press is 10-20mm.
Beneficial effects of the present invention is as follows:
The inventive method by being set to the 3/4 of blank height by the height of the first drift, it is effectively increased the height of primary drying, hydraulic press drive the first drift to blank round as a ball time, upper blind hole root can obtain the support of the first drift, thus not being easily formed step, after first time punching, ensure that blank height and ejection are highly close, thus avoiding the excessive surface material strip caused of press drafts in planar end surface process to enter the situation of endoporus formation step. Diameter at butt end 10mm��the 20mm bigger than the top diameter of the first drift of the second drift, can excise the rough bore area that first time punching causes, turn avoid the appearance of endoporus step, substantially increase punching efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first drift and the second drift in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
This embodiment of embodiment 1(is with material for 40Cr, and ejection is of a size of �� 768* �� 280*900mm blank and illustrates):
A kind of hole-punching method preventing high cylindrical forged piece overlap comprises the following steps:
The first step: by centrally disposed with blank for the axle center of microcephaly's drift of the first drift be coaxial, make microcephaly's drift of the first drift to blank punching by hydraulic press pressure, thus forming blind hole in one end of blank; The height of the first drift is less than blank height, and in Fig. 1, the first drift shown in a figure is of a size of �� 300* �� 270*675mm(major part punch diameter/microcephaly's punch diameter/highly). The height of the first drift is the 3/4 of blank height.
Second step:, after going out upper blind hole, there is side drum phenomenon in blank cylindrical, above-mentioned blank overturns 90 �� and makes the first drift be flattened by blank cylindrical side drum by the pressure of hydraulic press, complete round as a ball process, round as a ball complete after blank height be 915mm;
3rd step: blank overturns 90 �� again, utilizes hydraulic press that the blank other end carries out planar end surface, and in planar end surface process, the drafts of hydraulic press is 10mm, is prepared for second time punching by planar end surface.
4th step: by centrally disposed with blank for the axle center of the major part drift of the second drift be coaxial, make the major part drift of the second drift to the other end punching of blank by hydraulic press pressure, upper blind hole in blank is punched through, forming �� 280 through hole in blank, above-mentioned second drift is of a size of �� 280* �� 250*400mm(major part punch diameter/microcephaly's punch diameter/highly).
The diameter at butt end 10mm bigger than the top diameter of the first drift of above-mentioned second drift.
Above description is explanation of the invention, is not the restriction to invention, and limited range of the present invention is referring to claim, and when without prejudice to the basic structure of the present invention, the present invention can do any type of amendment.
Claims (1)
1. the hole-punching method preventing high cylindrical forged piece overlap, it is characterised in that comprise the following steps:
The first step: by centrally disposed with blank for the axle center of microcephaly's drift of the first drift be coaxial, make microcephaly's drift of the first drift to blank punching by hydraulic press pressure, thus forming blind hole in one end of blank; The height of described first drift is less than blank height, height is blank height the 3/4 of described first drift;
Second step: by blank overturn 90 ��, utilize hydraulic press that described blank is round as a ball, round as a ball complete after, take out the first drift;
3rd step: blank being continued upset 90 ��, makes the other end of blank upward, utilize hydraulic press that the other end of blank is carried out planar end surface, the drafts of described hydraulic press is 10-20mm;
4th step: by centrally disposed with blank for the axle center of the major part drift of the second drift be coaxial, make the major part drift of the second drift to the other end punching of blank by hydraulic press pressure, upper blind hole in blank is punched through, form through hole, the diameter at butt end 10��20mm bigger than the top diameter of the first drift of described second drift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410574051.5A CN104399801B (en) | 2014-10-24 | 2014-10-24 | A kind of hole-punching method preventing high cylindrical forged piece overlap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410574051.5A CN104399801B (en) | 2014-10-24 | 2014-10-24 | A kind of hole-punching method preventing high cylindrical forged piece overlap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104399801A CN104399801A (en) | 2015-03-11 |
| CN104399801B true CN104399801B (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410574051.5A Active CN104399801B (en) | 2014-10-24 | 2014-10-24 | A kind of hole-punching method preventing high cylindrical forged piece overlap |
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| CN (1) | CN104399801B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262648A (en) * | 2017-07-13 | 2017-10-20 | 安徽众鑫科技股份有限公司 | A kind of two-sided punching technology of rotor field spider |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826919B (en) * | 2015-05-25 | 2017-07-07 | 无锡派克新材料科技股份有限公司 | A kind of hole-punching method and punch structure for aluminum alloy forge piece |
| CN106799449A (en) * | 2016-12-01 | 2017-06-06 | 贵州安大航空锻造有限责任公司 | The enclosed hole-punching method of beta titanium alloy cylinder ring high |
| CN107414419A (en) * | 2017-07-20 | 2017-12-01 | 绍兴柯桥珂阳五金汽配厂 | A kind of accurate processing method of endoporus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159269Y (en) * | 1993-07-19 | 1994-03-23 | 武玉荣 | Die for tapered hole |
| JP3796002B2 (en) * | 1997-04-07 | 2006-07-12 | 株式会社トライヤーン | Punch unit |
| JP2010058132A (en) * | 2008-09-01 | 2010-03-18 | Oota:Kk | Pressing method and method for manufacturing ring-shaped belleville spring |
| CN102248103A (en) * | 2011-04-11 | 2011-11-23 | 徐州九鼎锻造科技有限公司 | Large wind power flange cake base pressing and double punching complex technology |
| CN102179683B (en) * | 2011-04-26 | 2012-07-11 | 张家港海陆环形锻件有限公司 | Manufacturing process for cylindrical blank of annular element |
| CN202278065U (en) * | 2011-10-26 | 2012-06-20 | 巨力索具股份有限公司 | Taper hole punching forming equipment for black metal forge pieces |
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2014
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262648A (en) * | 2017-07-13 | 2017-10-20 | 安徽众鑫科技股份有限公司 | A kind of two-sided punching technology of rotor field spider |
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| CN104399801A (en) | 2015-03-11 |
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Address after: 214161 lakes in Jiangsu province Wuxi City foreshore Hu Dai Industrial Zone North Road joint resettlement Patentee after: Wuxi Parker new materials Polytron Technologies Inc Address before: 214161 lakes in Jiangsu province Wuxi City foreshore Hu Dai Industrial Zone North Road No. 22 joint resettlement Patentee before: Wuxi Paike Heavy Casting and Forging Co., Ltd. |