CN104690200A - Forging method for hollow forging - Google Patents
Forging method for hollow forging Download PDFInfo
- Publication number
- CN104690200A CN104690200A CN201310670547.8A CN201310670547A CN104690200A CN 104690200 A CN104690200 A CN 104690200A CN 201310670547 A CN201310670547 A CN 201310670547A CN 104690200 A CN104690200 A CN 104690200A
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- CN
- China
- Prior art keywords
- forging
- blank
- biscuit
- hollow
- reverse frustoconic
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention belongs to the forging technical field and relates to a forging method for a hollow forging. The forging method comprises the following steps: firstly performing specially forging treatment on the blank for forming the inverted circular truncated cone blank, reserving certain amount for the shrinkage phenomenon, and conducting two-sided pinching and forging so as to avoid the impact to the part size due to the shrinkage phenomenon while the blank is punched and the diameter and height ratio of the blank is less than 1.5. The forging method for hollow forging is used for eliminating the shrinkage phenomenon generated by two-sided pinching and forging after heating while the ratio of the diameter of the punched through hole to the diameter of the blank is 0.3 or greater than 0.3.
Description
Technical field
The invention belongs to technical field of forging, relate to a kind of forging method of hollow forging.
Background technology
Hollow forging is one of common forging, and bar jumping-up is formed cylindrical biscuit by general employing, then the mode carrying out heating two-sided punching is forged and formed.
When needing to obtain diameter height than hollow forging below 1.5, or the institute through-hole diameter that rushes and biscuit diameter than more than 0.3 time, if when still adopting traditional cylindrical biscuit to heat two-sided punching, serious punching pulling-down phenomenon can be produced, cause product size defective.For such hollow forging, prevent pulling-down phenomenon, traditional manufacturing process has two kinds: after (1) punching, and increase planar end surface volume under pressure or turning make ring height reduce.(2) rush aperture and be then machined into macropore.The problem that these two kinds of methods are brought is: planar end surface all can not eliminate the misrun that pulling-down brings, and sometimes also can bring fold defect; Turning ring height or by aperture machine addition macropore, all can waste raw material, and technological process is many, the process-cycle is long.It, by carrying out special jumping-up process to blank, is first processed into the biscuit of reverse frustoconic by the present invention, in the reserved certain amount in biscuit local, and then carries out two-sided punching forging, substantially avoid the impact of pulling-down phenomenon on forging ' s block dimension.
Summary of the invention
The technical problem to be solved in the present invention is:
In the production of hollow forging, when required hollow forging diameter height is than below 1.5, or the institute through-hole diameter that rushes and biscuit diameter than more than 0.3 time, macropore forging is rushed if two-sided after taking cylinder blank to heat, due to the existence of pulling-down phenomenon, cause forging local misrun, forging ' s block dimension is difficult to reach requirement; Planar end surface all can not eliminate the misrun that pulling-down brings, and sometimes also can bring fold defect; If increase machining operation, turning ring height or by aperture machine addition macropore, this causes waste to raw material, and technological process is many, and the process-cycle is long.
Technical scheme of the present invention is:
A forging method for hollow forging, is characterized in that, comprises the steps,
Bar jumping-up to about 5/6 of former height, is formed blank by step 1;
Step 2 makes the blank slow circumvolve formed in step 1 by anvil block under forging hammer, coordinate upper ram to forge, in forging process, tup only contacts blank upper surface 1/3 outer ring surface, and forging until whole 1/3 outer ring surface has been pressed, and then flattens the bulge at center;
Step 3 repeats the technique in step 2, until hollow forging height 12mm ~ 30mm needed for blank aspect ratio, forms the biscuit of reverse frustoconic;
The reverse frustoconic biscuit formed in step 3 is heated to its forging temperature by step 4, holds greatly punching upward after coming out of the stove;
Step 5 overturns reverse frustoconic biscuit, goes out core material, forges required hollow forging.
Beneficial effect of the present invention is:
By bar forging being become the mode of reverse frustoconic biscuit, pulling-down phenomenon is reserved, well achieve the object that low diameter height can be processed into hollow forging by means of only forging than blank, planar end surface volume under pressure or mechanical cold working pattern is increased after making it break away from traditional punching, save raw material, shorten technological process, greatly save the time.
Accompanying drawing explanation
Fig. 1 is the forging schematic diagram of the biscuit of reverse frustoconic
Wherein, 1 is the workbench under forging hammer on anvil block, and 2 is upper ram, and 3 is the biscuit of reverse frustoconic.
Fig. 2 is the schematic diagram of the biscuit punching of reverse frustoconic
Wherein, 4 is drift.
Fig. 3 is the schematic diagram going out core material
Wherein, 5 is core material.
Detailed description of the invention
Below in conjunction with accompanying drawing, by specific embodiment, the invention will be further described:
Embodiment chooses certain cylinder forging, bar size: diameter 320mm, height 580mm, material: GH4169; Required finished product hollow forging is of a size of cylindrical
, endoporus
, highly
.
Implementation step is:
1600T hydraulic press chosen by first step forging equipment, and jumping-up of bar heating being come out of the stove is paramount
cylindrical blank.
As shown in Figure 1, the workbench 1 slowly under rotation forging hammer on anvil block, makes cylindrical blank rotate to second step, coordinates upper ram 2 to fall to forging, and makes tup only contact the outer ring width of blank upper surface and is about 110mm, until whole 1/3 outer ring surface has been pressed, finally press the bulge at center.
3rd step heat material melts down, and repeat aforesaid operations 2 times, upsetting goes out the biscuit 3 of reverse frustoconic, biscuit height 408mm, upper disc φ 412mm, lower disc φ 358mm.
4th step heat material melts down, as shown in Figure 2, with drift 4 by the punching upward of large for inverted round stage biscuit end.
As shown in Figure 3, upset inverted round stage biscuit goes out core material 5, planar end surface, flat bulge to 5th step, completes hollow forging and is shaped.
Through measuring, 1 is of a size of cylindrical 412mm, endoporus 191mm, height 393mm.Another 1 is of a size of cylindrical 411mm, endoporus 188mm, height 394mm.2 hollow forging sizes forging meet technical requirement, do not have pulling-down phenomenon.
Claims (1)
1. a forging method for hollow forging, is characterized in that, comprises the steps,
Bar jumping-up to about 5/6 of former height, is formed blank by step 1;
Step 2 makes the blank slow circumvolve formed in step 1 by the workbench (1) on anvil block under forging hammer, coordinate upper ram (2) to forge, in forging process, tup only contacts blank upper surface 1/3 outer ring surface, forging until whole 1/3 outer ring surface has been pressed, and then flattens the bulge at center;
Step 3 repeats the technique in step 2, until hollow forging height 12mm ~ 30mm needed for blank aspect ratio, forms the biscuit (3) of reverse frustoconic;
The reverse frustoconic biscuit formed in step 3 is heated to its forging temperature by step 4, and after coming out of the stove, large end upward, by drift (4) punching;
Step 5 overturns reverse frustoconic biscuit, goes out core material (5), forges required hollow forging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310670547.8A CN104690200A (en) | 2013-12-10 | 2013-12-10 | Forging method for hollow forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310670547.8A CN104690200A (en) | 2013-12-10 | 2013-12-10 | Forging method for hollow forging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104690200A true CN104690200A (en) | 2015-06-10 |
Family
ID=53337962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310670547.8A Pending CN104690200A (en) | 2013-12-10 | 2013-12-10 | Forging method for hollow forging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104690200A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623717A (en) * | 2016-12-01 | 2017-05-10 | 贵州安大航空锻造有限责任公司 | Closed punching method for 1Cr13 type stainless steel high-drum ring piece |
| CN107626864A (en) * | 2017-08-21 | 2018-01-26 | 柳州科尔特锻造机械有限公司 | The forging method of hollow forging |
| CN111761009A (en) * | 2020-05-07 | 2020-10-13 | 山东南山铝业股份有限公司 | Forging forming method of 2A70 aluminum alloy aircraft engine conical shell |
| CN113414342A (en) * | 2020-06-11 | 2021-09-21 | 德力佳传动科技(江苏)有限公司 | Forging method of roller way planet wheel |
| CN114192712A (en) * | 2021-12-22 | 2022-03-18 | 二重（德阳）重型装备有限公司 | Die forging forming die and die forging forming method for large L-shaped hollow thin-wall pipeline |
Citations (5)
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| SU1391791A1 (en) * | 1986-06-25 | 1988-04-30 | Производственное Объединение "Ждановтяжмаш" | Method of forging hollow forgings |
| CN1736654A (en) * | 2004-08-19 | 2006-02-22 | 中国北车集团大同电力机车有限责任公司 | Integrated forging method of flange type step thin wall long sheath forging |
| CN101618422A (en) * | 2009-07-17 | 2010-01-06 | 宁波安拓实业有限公司 | Manufacturing method of internal jacket |
| CN102189182A (en) * | 2011-04-09 | 2011-09-21 | 张家港海陆环形锻件有限公司 | Compound die fixture for blanking of ring forge piece |
| 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 |
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2013
- 2013-12-10 CN CN201310670547.8A patent/CN104690200A/en active Pending
Patent Citations (5)
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| SU1391791A1 (en) * | 1986-06-25 | 1988-04-30 | Производственное Объединение "Ждановтяжмаш" | Method of forging hollow forgings |
| CN1736654A (en) * | 2004-08-19 | 2006-02-22 | 中国北车集团大同电力机车有限责任公司 | Integrated forging method of flange type step thin wall long sheath forging |
| CN101618422A (en) * | 2009-07-17 | 2010-01-06 | 宁波安拓实业有限公司 | Manufacturing method of internal jacket |
| CN102189182A (en) * | 2011-04-09 | 2011-09-21 | 张家港海陆环形锻件有限公司 | Compound die fixture for blanking of ring forge piece |
| 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 |
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| 张如华等: "孔径比为2.50~3.00的自由锻冲孔坯料形状研究", 《锻压技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623717A (en) * | 2016-12-01 | 2017-05-10 | 贵州安大航空锻造有限责任公司 | Closed punching method for 1Cr13 type stainless steel high-drum ring piece |
| CN107626864A (en) * | 2017-08-21 | 2018-01-26 | 柳州科尔特锻造机械有限公司 | The forging method of hollow forging |
| CN111761009A (en) * | 2020-05-07 | 2020-10-13 | 山东南山铝业股份有限公司 | Forging forming method of 2A70 aluminum alloy aircraft engine conical shell |
| CN113414342A (en) * | 2020-06-11 | 2021-09-21 | 德力佳传动科技(江苏)有限公司 | Forging method of roller way planet wheel |
| CN114192712A (en) * | 2021-12-22 | 2022-03-18 | 二重（德阳）重型装备有限公司 | Die forging forming die and die forging forming method for large L-shaped hollow thin-wall pipeline |
| WO2023115752A1 (en) * | 2021-12-22 | 2023-06-29 | 二重（德阳）重型装备有限公司 | Die forging forming die and die forging forming method for large l-shaped hollow thin-walled pipe |
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Application publication date: 20150610 |