CN103100634A - Trimming method of crank arm forging - Google Patents
Trimming method of crank arm forging Download PDFInfo
- Publication number
- CN103100634A CN103100634A CN2013100124334A CN201310012433A CN103100634A CN 103100634 A CN103100634 A CN 103100634A CN 2013100124334 A CN2013100124334 A CN 2013100124334A CN 201310012433 A CN201310012433 A CN 201310012433A CN 103100634 A CN103100634 A CN 103100634A
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- CN
- China
- Prior art keywords
- forging
- arm
- crank arm
- straight
- cranking
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- 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.)
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention relates to a trimming method of a crank arm forging. The trimming method of the crank arm forging aims to standardize the trimming process of distance between two straight arms of the crank arm forging. In a first flat upsetting process, the distance of outer ends of between two straight arms of the crank arm forging L2 equals to a base of a triangular knife B; in a second flat upsetting process, due to the fact that the width equals to the distance of outer ends of between two straight arms of the crank arm forging L2, the distance between two straight arms of the crank arm forging of L2 and L1 are equal. The trimming method of the crank arm forging solves the problem that correcting process is needed in later period in the prior art, and thereby greatly improving production efficiency and machining progress.
Description
Technical field
The present invention relates to the forging field, relate in particular to a kind of method for trimming of the forging of cranking arm.
Background technology
The marine diesel main shaft is the main rotary gadget of engine, and after loading onto connecting rod, up and down (back and forth) motion that can accept connecting rod becomes circulation (rotation) motion, is important parts on engine.The diesel engine main shaft is to be connected and composed by a plurality of cranking arm, in prior art, crank arm forging structure as shown in Figure 1, be " U " shape part, the forging of cranking arm is completed the forging and pressing distortion afterwards in order to satisfy the process requirement, need to repair, traditional method for trimming is that the forging of cranking arm is placed on workbench, utilizes the hydraulic press upsetting flat.After but upsetting is flat, the stressed rear generation distortion of the forging of cranking arm, cause cranking arm forging two straight-arm end outer end spacing L2 greater than inner spacing L1 or the outer end spacing L2 situation less than inner spacing L1, in order to make L1=L2=L (as shown in Figure 1), need to carry out the later stage corrects, 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 provides a kind of method for trimming of the forging of cranking arm for the problem that occurs in above-mentioned dressing process, makes the dressing process standardization of the forging of cranking arm, and has greatly improved the forging qualification rate of cranking arm.
The technical scheme that content of the present invention adopts is as follows:
A kind of method for trimming of the forging of cranking arm is characterized in that comprising following steps:
The first step: cranking arm between forging two straight-arm ends, place triangular knife on workbench;
Second step: utilize hydraulic press flat to the forging upsetting of cranking arm, make the forging two straight-arm end outer end spacing L2 that crank arm equal triangular knife base length B;
The 3rd step: the forging of cranking arm is placed on workbench, places cushion block in cranking arm between forging two straight-arm ends, and is flat to the forging upsetting of cranking arm by hydraulic press, makes the forging two straight-arm end outer end spacing L2 that crank arm equal inner spacing L1.
Beneficial effect of the present invention is as follows:
Utilize method of the present invention to make to crank arm the dressing process standardization of forging two straight-arm end spacings, make the forging two straight-arm end outer end spacing L2 that crank arm equal the triangular knife width B in the flat process of upsetting for the first time, pier is flat for the second time, because the thickness of cushion block equates with the forging two straight-arm end outer end spacing L2 that crank arm, thereby make the forging two straight-arm end spacing L2=L1 that crank arm, adopt method of the present invention to solve needs to carry out the process of later stage correction in the past, has greatly improved production efficiency and processing progress.
Description of drawings
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 of the flat forging of cranking arm of upsetting for the first time.
Crank arm after Fig. 4 completes for upsetting for the first time the is flat structural representation of forging.
Fig. 5 is the schematic diagram of the flat forging of cranking arm of upsetting for the second time.
Crank arm after Fig. 6 completes for upsetting for the second time the is flat structural representation of forging.
The specific embodiment
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 101 liang of straight-arm ends of forging, place triangular knife on workbench 2, the structure of triangular knife 1 as shown in Figure 2, its length and the equal in length of forging of cranking arm.
Second step: as shown in Figure 3, utilize hydraulic press flat to the forging upsetting of cranking arm, in the flat process of upsetting, the forging 101 of cranking arm is subjected to hydraulic press pressure from top to bottom, due to the size B on the base of triangular knife 1 greater than the 101 liang of straight-arm end spacing L2 of forging that crank arm, so the 101 liang of straight-arm ends of forging of cranking arm enlarge along the triangular knife inclined-plane, because the width of triangular knife 1 is B, as shown in Figure 4, the 101 liang of straight-arm end outer end spacing L2 of forging that can crank arm thus equal triangular knife length B.
the 3rd step: as shown in Figure 5, the forging 101 of cranking arm laterally is placed in workbench (workbench is not shown at Fig. 5), place cushion block 3 this moment between 101 liang of straight-arm ends of forging in cranking arm, the thickness C of cushion block 3 equates with the inner spacing L1 of 101 liang of straight-arm ends of forging that cranks arm, utilize hydraulic press to carry out upsetting for the second time to the forging 101 of cranking arm flat, after upsetting is put down and is completed, as shown in Figure 5, after the 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 101 liang of straight-arm ends of forging equals the cushion block length C owing to cranking arm, thereby the forging two straight-arm end outer end spacing L2 that realize cranking arm equal inner spacing L1.
Utilize method of the present invention to make to crank arm the dressing process standardization of forging two straight-arm end spacings, make the forging two straight-arm end outer end spacing L2 that crank arm equal the triangular knife width B in the flat process of upsetting for the first time, upsetting for the second time is flat, because the thickness of cushion block equates with the forging two straight-arm end outer end spacing L2 that crank arm, thereby make the forging two straight-arm end spacing L2=L1 that crank arm, adopt method of the present invention to solve needs to carry out the process of later stage correction in the past, has greatly improved production efficiency and processing progress.
Above description is explanation of the invention, is not that limited range of the present invention is referring to claim, in the situation that without prejudice to basic structure of the present invention, the present invention can do any type of modification to the restriction of invention.
Claims (1)
1. the method for trimming of the forging of cranking arm is characterized in that comprising following steps:
The first step: cranking arm between forging two straight-arm ends, place triangular knife on workbench;
Second step: utilize hydraulic press flat to the forging upsetting of cranking arm, make the forging two straight-arm end outer end spacing L2 that crank arm equal triangular knife base length B;
The 3rd step: the forging of cranking arm is placed on workbench, places cushion block in cranking arm between forging two straight-arm ends, and is flat to the forging upsetting of cranking arm by hydraulic press, makes the forging two straight-arm end outer end spacing L2 that crank arm equal 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 true CN103100634A (en) | 2013-05-15 |
| CN103100634B CN103100634B (en) | 2015-12-23 |
Family
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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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020510A (en) * | 2021-03-08 | 2021-06-25 | 石钢京诚装备技术有限公司 | Forging method for improving near-surface flaw detection defects of marine rudder system product |
Citations (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 |
| GB2114474A (en) * | 1982-02-12 | 1983-08-24 | British Steel Corp | Forging steel blanks |
| CS254818B1 (en) * | 1985-12-19 | 1988-02-15 | Jiri Elfmark | Method of crankshafts' middle parts production |
| JPH0513740B2 (en) * | 1985-10-14 | 1993-02-23 | Kobe Steel Ltd | |
| CN101195145A (en) * | 2007-12-28 | 2008-06-11 | 中国科学院金属研究所 | Large-scale marine crankshaft crank bend forging finishing device and its application method |
-
2013
- 2013-01-14 CN CN201310012433.4A patent/CN103100634B/en not_active Expired - Fee Related
Patent Citations (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 |
| GB2114474A (en) * | 1982-02-12 | 1983-08-24 | British Steel Corp | Forging steel blanks |
| JPH0513740B2 (en) * | 1985-10-14 | 1993-02-23 | Kobe Steel Ltd | |
| CS254818B1 (en) * | 1985-12-19 | 1988-02-15 | Jiri Elfmark | Method of crankshafts' middle parts production |
| CN101195145A (en) * | 2007-12-28 | 2008-06-11 | 中国科学院金属研究所 | Large-scale marine crankshaft crank bend forging finishing device and its application method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020510A (en) * | 2021-03-08 | 2021-06-25 | 石钢京诚装备技术有限公司 | Forging method for improving near-surface flaw detection defects of marine rudder system product |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103100634B (en) | 2015-12-23 |
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| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20180114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |