CN103100634B - A kind of method for trimming of forging of cranking arm - Google Patents
A kind of method for trimming of forging of cranking arm Download PDFInfo
- Publication number
- CN103100634B CN103100634B CN201310012433.4A CN201310012433A CN103100634B CN 103100634 B CN103100634 B CN 103100634B CN 201310012433 A CN201310012433 A CN 201310012433A CN 103100634 B CN103100634 B CN 103100634B
- Authority
- CN
- China
- Prior art keywords
- forging
- arm
- straight
- cranking
- cranking arm
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/08—Making machine elements axles or shafts crankshafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The present invention relates to a kind of method for trimming of forging of cranking arm, method of the present invention is utilized to make to crank arm the dressing process standardization of forging two straight-arm end spacing, the forging two straight-arm end outer end spacing L2 that makes in first time upsetting flat process to crank arm equals triangular knife base B, second time upsetting is put down, due to the width of cushion block, outer end spacing L2 is equal with forging two straight-arm end of cranking arm, thus make the forging two straight-arm end spacing L2=L1 that cranks arm, adopt method of the present invention to solve to need the process of carrying out later stage correction in the past, substantially increase production efficiency and processing progress.
Description
Technical field
The present invention relates to forging field, particularly relate to a kind of method for trimming of forging of cranking arm.
Background technology
Marine diesel main shaft is the main rotary gadget of engine, and after loading onto connecting rod, upper and lower (back and forth) motion can accepting connecting rod becomes circulation (rotation) and moves, and is the important parts of on engine one.Diesel engine main shaft is connected and composed by multiple cranking arm, in prior art, crank arm forging structure as shown in Figure 1, for " U " shape part, crank arm forging after completing swaging deformation to meet process requirement, need to repair, traditional method for trimming puts on the table by forging of cranking arm, and utilizes hydraulic press upsetting to put down.After but upsetting is flat, the stressed rear generation distortion of forging of cranking arm, the forging two straight-arm end outer end spacing L2 that causes cranking arm is greater than the situation that inner spacing L1 or outer end spacing L2 is less than inner spacing L1, in order to make L1=L2=L (as shown in Figure 1), need to carry out later stage correction, this correction procedure is wasted time and energy, and has had a strong impact on processing progress, reduces production efficiency.
Summary of the invention
The applicant, for produced problem in above-mentioned dressing process, provides a kind of method for trimming of forging of cranking arm, and the dressing process standardization of the forging that makes to crank arm, substantially increases forging qualification rate of cranking arm.
The technical scheme that content of the present invention adopts is as follows:
To crank arm the method for trimming of forging, it is characterized in that comprising following steps:
The first step: cranking arm between forging two straight-arm end, place triangular knife on the table;
Second step: utilize hydraulic press to put down forging upsetting of cranking arm, the forging two straight-arm end outer end spacing L2 that makes to crank arm equals triangular knife base length B;
3rd step: forging of cranking arm is placed on workbench, cushion block is placed in cranking arm between forging two straight-arm end, the thickness C of cushion block is equal with the inner spacing L1 of forging two straight-arm end of cranking arm, by hydraulic press, forging upsetting of cranking arm is put down, after forging of cranking arm is stressed, its outer end spacing L2 changes pad thickness C into by the triangular knife width B of above-mentioned second step, and the forging two straight-arm end outer end spacing L2 that makes to crank arm equals inner spacing L1.
Beneficial effect of the present invention is as follows:
Method of the present invention is utilized to make to crank arm the dressing process standardization of forging two straight-arm end spacing, the forging two straight-arm end outer end spacing L2 that makes in first time upsetting flat process to crank arm equals triangular knife width B, second time pier is put down, due to the thickness of cushion block, outer end spacing L2 is equal with forging two straight-arm end of cranking arm, thus make the forging two straight-arm end spacing L2=L1 that cranks arm, adopt method of the present invention to solve to need the process of carrying out later stage correction in the past, substantially increase production efficiency and processing progress.
Accompanying drawing explanation
Fig. 1 is the structural representation of forging of cranking arm.
Fig. 2 is the structural representation of triangular knife.
Fig. 3 is the schematic diagram that forging of cranking arm is put down in first time upsetting.
Fig. 4 is the structural representation of forging of having cranked arm after first time upsetting has been put down.
Fig. 5 is the schematic diagram that forging of cranking arm is put down in second time upsetting.
Fig. 6 is the structural representation of forging of having cranked arm after second time upsetting has been put down.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
The method for trimming of a kind of forging of cranking arm of the present invention comprises following steps:
The first step: as shown in Figure 3, cranking arm between forging 101 liang of straight-arm ends, triangular knife is placed by workbench 2, and as shown in Figure 2, its length is equal with the length of forging of cranking arm for the structure of triangular knife 1.
Second step: as shown in Figure 3, hydraulic press is utilized to put down forging upsetting of cranking arm, in the flat process of upsetting, crank arm forging 101 by hydraulic press pressure from top to bottom, size B due to the base of triangular knife 1 is greater than the forging 101 liang of straight-arm end spacing L2 that crank arm, so forging 101 liang of straight-arm ends of cranking arm expand along triangular knife inclined-plane, the width due to triangular knife 1 is B, as shown in Figure 4, the forging 101 liang of straight-arm end outer end spacing L2 that can crank arm thus equal triangular knife length B.
3rd step: as shown in Figure 5, forging 101 of cranking arm laterally is placed in workbench (workbench is not shown in Figure 5), now place cushion block 3 in cranking arm between forging 101 liang of straight-arm ends, inner spacing L1 is equal for thickness C and forging 101 liang of straight-arm ends of cranking arm of cushion block 3, utilize hydraulic press to carry out second time upsetting to forging 101 of cranking arm to put down, after upsetting has been put down, as shown in Figure 5, after forging 101 of cranking arm is stressed, its outer end spacing L2 changes pad thickness C into by the triangular knife width B of above-mentioned second step, and the inner spacing L1 of forging 101 liang of straight-arm ends equals pad thickness C owing to cranking arm, thus realization is cranked arm, forging two straight-arm end outer end spacing L2 equals inner spacing L1.
Method of the present invention is utilized to make to crank arm the dressing process standardization of forging two straight-arm end spacing, the forging two straight-arm end outer end spacing L2 that makes in first time upsetting flat process to crank arm equals triangular knife width B, second time upsetting is put down, due to the thickness of cushion block, outer end spacing L2 is equal with forging two straight-arm end of cranking arm, thus make the forging two straight-arm end spacing L2=L1 that cranks arm, adopt method of the present invention to solve to need the process of carrying out later stage correction in the past, substantially increase production efficiency and processing progress.
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 (1)
1. to crank arm the method for trimming of forging, it is characterized in that comprising following steps:
The first step: cranking arm between forging two straight-arm end, place triangular knife on the table;
Second step: utilize hydraulic press to put down forging upsetting of cranking arm, the forging two straight-arm end outer end spacing L2 that makes to crank arm equals triangular knife base length B;
3rd step: forging of cranking arm is placed on workbench, cushion block is placed in cranking arm between forging two straight-arm end, the thickness C of cushion block is equal with the inner spacing L1 of forging two straight-arm end of cranking arm, by hydraulic press, forging upsetting of cranking arm is put down, after forging of cranking arm is stressed, its outer end spacing L2 changes pad thickness C into by the triangular knife width B of above-mentioned second step, and the forging two straight-arm end outer end spacing L2 that makes to crank arm equals inner spacing L1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310012433.4A CN103100634B (en) | 2013-01-14 | 2013-01-14 | A kind of method for trimming of forging of cranking arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310012433.4A CN103100634B (en) | 2013-01-14 | 2013-01-14 | A kind of method for trimming of forging of cranking arm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103100634A CN103100634A (en) | 2013-05-15 |
| CN103100634B true CN103100634B (en) | 2015-12-23 |
Family
ID=48309020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310012433.4A Expired - Fee Related CN103100634B (en) | 2013-01-14 | 2013-01-14 | A kind of method for trimming of forging of cranking arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103100634B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020510B (en) * | 2021-03-08 | 2023-08-22 | 石钢京诚装备技术有限公司 | Forging method for improving near-surface flaw detection defect of marine shaft rudder system product |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1133219B (en) * | 1959-09-05 | 1962-07-12 | Hoerder Huettenunion Ag | Process for the production of U-shaped blanks for crankshaft lifts |
| GB2114474B (en) * | 1982-02-12 | 1985-08-14 | British Steel Corp | Forging steel blanks |
| JPS6289544A (en) * | 1985-10-14 | 1987-04-24 | Kobe Steel Ltd | Method and device for partial die forging of crank throw |
| CS254818B1 (en) * | 1985-12-19 | 1988-02-15 | Jiri Elfmark | Method of crankshafts' middle parts production |
| CN100509206C (en) * | 2007-12-28 | 2009-07-08 | 中国科学院金属研究所 | Large-scale crankshaft crank bend forging for boat final finishing device and used method thereof |
-
2013
- 2013-01-14 CN CN201310012433.4A patent/CN103100634B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103100634A (en) | 2013-05-15 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20180114 |