CN104399801A - Punching method for preventing high cylinder forging from generating flange - Google Patents
Punching method for preventing high cylinder forging from generating flange Download PDFInfo
- Publication number
- CN104399801A CN104399801A CN201410574051.5A CN201410574051A CN104399801A CN 104399801 A CN104399801 A CN 104399801A CN 201410574051 A CN201410574051 A CN 201410574051A CN 104399801 A CN104399801 A CN 104399801A
- Authority
- CN
- China
- Prior art keywords
- blank
- drift
- punching
- height
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004080 punching Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005242 forging Methods 0.000 title abstract description 7
- 208000004141 microcephaly Diseases 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention relates to a punching method for preventing a high cylinder forging from generating a flange. The height of a first punch is set to be three fourth of the height of a blank, the height of primary punching is effectively increased, and when a hydraulic machine drives the first punch to roll the blank, the root of an upper blind hole can be supported by the first punch and a step is not easy to form; the blank height is ensured to be close to the ejection height after the primary punching, so that a condition that the rolling reduction of a press is overlarge to cause a surface blank to be brought into an inner hole to form a step in the process of levelling the end face is avoided. The large head diameter of a second punch is 10-20mm greater than the small head diameter of the first punch, the rough surface of the inner hole caused by the primary punching can be removed, the step in the inner hole is avoided, and the punching efficiency is greatly improved.
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 due to ejection highly higher, forge often adopts the method for two-sided punching to carry out punching, and two-sided punching needs to carry out first time punching and second time punching respectively, but usually there is following situation before second time punch process:
(1) height of punch too low, band is when rushing round as a ball, and upper blind hole root, without drift support, easily forms step under the pressure of hydraulic press.
(2) planar end surface drafts is comparatively large, and under high temperature, metal fluidity is good, easily surface metal is brought into forging endoporus and forms step.
(3) top diameter of drift differs too large with two diameter at butt ends rushed, in second time punch process, easily form step.
Owing to easily forming step at endoporus before above-mentioned second time punch process, step in second time punch process is caused to be taken out of, thus easily form forging flash image, forging flash is needed to adopt lancing method by flash removal usually, but the contact surface after removing is comparatively coarse, in follow-up rolling ring process, easily produce the defects such as folding, bark pocket, thus form puzzlement to follow-up rolling ring process.
Summary of the invention
The applicant, for above-mentioned existing issue, is studied improvement, provides a kind of hole-punching method preventing high cylindrical forged piece overlap, effectively eliminates forging endoporus step, produces finning after preventing two-sided punching.
The technical solution adopted in the present invention is as follows:
Prevent a hole-punching method for high cylindrical forged piece overlap, comprise the following steps:
The first step: be set to coaxial with blank center by the axle center of microcephaly's drift of the first drift, is exerted pressure by hydraulic press and makes microcephaly's drift of the first drift to blank punching, thus form blind hole in one end of blank; The height of described first drift is less than blank height;
Second step: blank is overturn 90 °, utilizes hydraulic press round as a ball to described blank, round as a ball complete after, take out the first drift;
3rd step: blank is continued upset 90 °, the other end making blank, utilizes hydraulic press to carry out planar end surface to the other end of blank upward;
4th step: be set to coaxial with blank center by the axle center of the major part drift of the second drift, is exerted pressure by hydraulic press and makes the major part drift of the second drift to the other end punching of blank, the upper blind hole punching in blank is worn, forms through hole.
Its further technical scheme is:
The height of described first drift is 3/4 of blank height;
Diameter at butt end 10 ~ the 20mm larger than the top diameter of the first drift of described second drift;
Described in the 3rd step during planar end surface process, the drafts of described hydraulic press is 10-20mm.
Beneficial effect of the present invention is as follows:
The inventive method is by being set to 3/4 of blank height by the height of the first drift, the height of effective increase primary drying, when hydraulic press drives the first drift round as a ball to blank, upper blind hole root can obtain the support of the first drift, thus not easily form step, after first time punching, ensure that blank height and ejection are highly close, thus avoid the situation that the excessive surperficial material strip caused of press drafts in planar end surface process enters endoporus formation step.Diameter at butt end 10mm ~ the 20mm larger 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(take material as 40Cr, and ejection is of a size of φ 768* φ 280*900mm blank and is described):
A kind of hole-punching method of high cylindrical forged piece overlap that prevents comprises the following steps:
The first step: be set to coaxial with blank center by the axle center of microcephaly's drift of the first drift, is exerted pressure by hydraulic press and makes microcephaly's drift of the first drift to blank punching, thus form blind hole in one end of blank; The height of the first drift is less than blank height, and as shown in a figure in Fig. 1, the first drift is of a size of φ 300* φ 270*675mm(major part punch diameter/microcephaly's punch diameter/highly).The height of the first drift is 3/4 of blank height.
Second step:, after going out upper blind hole, blank cylindrical occur side drum phenomenon, above-mentioned blank is overturn 90 ° by the pressure of hydraulic press make the first drift by blank cylindrical side drum flatten, complete round as a ball process, round as a ball complete after blank height be 915mm;
3rd step: blank is overturn 90 ° again, utilizes hydraulic press to carry out planar end surface to the blank other end, and in planar end surface process, the drafts of hydraulic press is 10mm, by planar end surface for second time punching is prepared.
4th step: the axle center of the major part drift of the second drift is set to coaxial with blank center, being exerted pressure by hydraulic press makes the major part drift of the second drift to the other end punching of blank, upper blind hole punching in blank is worn, in blank, form φ 280 through hole, above-mentioned second drift is of a size of φ 280* φ 250*400mm(major part punch diameter/microcephaly's punch diameter/highly).
The diameter at butt end 10mm larger than the top diameter of the first drift of above-mentioned second drift.
More than describing is explanation of the invention, and be not the restriction to invention, limited range of the present invention is see claim, and when without prejudice to basic structure of the present invention, the present invention can do any type of amendment.
Claims (4)
1. prevent a hole-punching method for high cylindrical forged piece overlap, it is characterized in that comprising the following steps:
The first step: be set to coaxial with blank center by the axle center of microcephaly's drift of the first drift, is exerted pressure by hydraulic press and makes microcephaly's drift of the first drift to blank punching, thus form blind hole in one end of blank; The height of described first drift is less than blank height;
Second step: blank is overturn 90 °, utilizes hydraulic press round as a ball to described blank, round as a ball complete after, take out the first drift;
3rd step: blank is continued upset 90 °, the other end making blank, utilizes hydraulic press to carry out planar end surface to the other end of blank upward;
4th step: be set to coaxial with blank center by the axle center of the major part drift of the second drift, is exerted pressure by hydraulic press and makes the major part drift of the second drift to the other end punching of blank, the upper blind hole punching in blank is worn, forms through hole.
2. a kind of hole-punching method preventing high cylindrical forged piece overlap as claimed in claim 1, is characterized in that: the height of described first drift is 3/4 of blank height.
3. a kind of hole-punching method preventing high cylindrical forged piece overlap as claimed in claim 1, is characterized in that: the diameter at butt end 10 ~ 20mm larger than the top diameter of the first drift of described second drift.
4. a kind of hole-punching method preventing high cylindrical forged piece overlap as claimed in claim 1, is characterized in that: described in the 3rd step during planar end surface process, the drafts of described hydraulic press is 10-20mm.
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 true CN104399801A (en) | 2015-03-11 |
| CN104399801B CN104399801B (en) | 2016-06-08 |
Family
ID=52637504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410574051.5A Active CN104399801B (en) | 2014-10-24 | 2014-10-24 | A kind of hole-punching method preventing high cylindrical forged piece overlap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104399801B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826919A (en) * | 2015-05-25 | 2015-08-12 | 无锡市派克重型铸锻有限公司 | Punching method and punch structure used for aluminum alloy forged 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262648B (en) * | 2017-07-13 | 2020-02-11 | 安徽众鑫科技股份有限公司 | Double-sided punching process for rotor bracket |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159269Y (en) * | 1993-07-19 | 1994-03-23 | 武玉荣 | Die for tapered hole |
| JPH10277664A (en) * | 1997-04-07 | 1998-10-20 | Toraiyaan:Kk | Punch unit |
| JP2010058132A (en) * | 2008-09-01 | 2010-03-18 | Oota:Kk | Pressing method and method for manufacturing ring-shaped belleville spring |
| CN102179683A (en) * | 2011-04-26 | 2011-09-14 | 张家港海陆环形锻件有限公司 | Manufacturing process for cylindrical blank of annular element |
| 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 |
| 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 |
-
2014
- 2014-10-24 CN CN201410574051.5A patent/CN104399801B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159269Y (en) * | 1993-07-19 | 1994-03-23 | 武玉荣 | Die for tapered hole |
| JPH10277664A (en) * | 1997-04-07 | 1998-10-20 | Toraiyaan:Kk | 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 |
| CN102179683A (en) * | 2011-04-26 | 2011-09-14 | 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826919A (en) * | 2015-05-25 | 2015-08-12 | 无锡市派克重型铸锻有限公司 | Punching method and punch structure used for aluminum alloy forged piece |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104399801B (en) | 2016-06-08 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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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. |