CN106623749B - Method for forging full-flow connecting rod of forging parting surface - Google Patents
Method for forging full-flow connecting rod of forging parting surface Download PDFInfo
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- CN106623749B CN106623749B CN201610985460.3A CN201610985460A CN106623749B CN 106623749 B CN106623749 B CN 106623749B CN 201610985460 A CN201610985460 A CN 201610985460A CN 106623749 B CN106623749 B CN 106623749B
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- forging
- connecting rod
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- parting surface
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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
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
- B21K1/766—Connecting rods
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- 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
- B21J5/002—Hybrid process, e.g. forging following casting
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- 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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention relates to a method for forging a full-flow connecting rod of a forging parting surface, which is characterized in that a semi-closed type preforming process scheme is adopted for a preforming die cavity formed by forging the connecting rod, and a parting surface is not selected at the middle position of the thickness direction of the forging die cavity, but is translated by 5-12 mm from the middle plane of the thickness direction to the upper die direction. According to the method for forging the full-flow-line connecting rod of the forging parting surface, the obtained connecting rod is detected from the position of the parting surface, the obtained forging flow line is consistent with the appearance of the connecting rod, the flow line shape is continuous and complete, and the shapes of turbulence, backflow and the like are avoided, so that the service life of the connecting rod is prolonged by more than 20% compared with the connecting rod obtained by a common process, and by adopting the process scheme, the material utilization rate of the forging production of the connecting rod forging is improved by more than 10%, and the method has a very considerable economic and technical effect.
Description
Technical Field
The invention relates to a forging method, in particular to a method for forging a full-flow connecting rod of a forging parting surface.
Background
Connecting rods are important parts in automobile engines, connect pistons and crankshafts, and function to convert reciprocating motion of the pistons into rotational motion of the crankshafts and to transmit forces acting on the pistons to the crankshafts for power output. The connecting rod is subjected to longitudinal and transverse inertia forces in addition to the pressure generated by the combustion gases in the combustion chamber during operation. Therefore, the connecting rod works in a complex stress state, and bears the alternating tensile stress and the alternating compressive stress and the bending stress, so that an automobile connecting rod blank is forged, the streamline of the connecting rod is required to be consistent with the stress direction of a forged piece, and the service life of the connecting rod is prolonged.
The forging production process of the connecting rod is as follows: firstly, a bar stock with a proper length is heated to a certain temperature, a blank is manufactured through a roll forging or wedge cross rolling process, then forging forming is carried out on a pre-forming die and a final forming die, and then trimming, punching and the like are carried out. Because the shape of the connecting rod forging is complex, a large flash can be formed in the forging process, the metal flow line of the connecting rod forging cannot be consistent with the appearance of the forging usually, the metal flow line is incomplete, and the connecting rod cannot be guaranteed to have good mechanical property and long service life.
Disclosure of Invention
The invention aims to provide a method for forging a full-flow-line connecting rod of a forging parting surface, which is characterized in that when a blank produced by a roll forging or wedge cross rolling process is placed in a connecting rod pre-forging forming die for preforming, the position and the shape of a common flash are changed, and then finish forging forming is carried out, so that the obtained metal flow line of a forged piece is continuous and complete and is consistent with the appearance of the forged piece, and the good mechanical property and the long service life of an automobile connecting rod are ensured.
A method for forging a full-flow connecting rod of a forging parting surface comprises the following specific steps:
1) blanking: processing a blank by a sawing machine or a shearing machine according to the size and the material required by the process design;
2) heating: heating the blank material to 1180-1250 ℃ by adopting a rapid or little oxidation-free mode;
3) blank preparation: adopting a roll forging or wedge cross rolling mode to roll the blank material to be thin according to the requirement and increase the length;
4) forging: placing a blank material which is rolled and formed according to requirements into a pre-forging die which is preheated to 200-250 ℃ for forging, translating a die cavity parting surface of the pre-forging die to the direction of an upper die by 5-12 mm, and positioning a parting surface of a die cavity of a finish-forging die at the middle position of the thickness direction of a forge piece, namely the position of a flash formed in the forging process, wherein the position is changed in the pre-forging step, and the lower die of the pre-forging die protrudes upwards along the periphery of the flash;
5) trimming and punching: removing flash and connecting skin of the large and small connecting rod holes formed after finish forging;
6) thermal correction: and (4) putting the connecting rod forging onto a correction die, and carrying out coining on the big end and the small end of the connecting rod.
Has the advantages that:
according to the method for forging the full-flow-line connecting rod of the forging parting surface, the obtained connecting rod is detected from the position of the parting surface, the obtained forging flow line is consistent with the appearance of the connecting rod, the flow line shape is continuous and complete, and the shapes of turbulence, backflow and the like are avoided, so that the service life of the connecting rod is prolonged by more than 20% compared with the connecting rod obtained by a common process, and by adopting the process scheme, the material utilization rate of the forging production of the connecting rod forging is improved by more than 10%, and the method has a very considerable economic and technical effect.
Drawings
Fig. 1 is a sectional view of a structure of a preform mold according to the present invention.
Detailed Description
The invention is further illustrated by the following specific examples.
A method for forging a full-flow connecting rod of a forging parting surface is characterized in that a semi-closed type preforming process scheme is adopted for a preforming die cavity formed by forging the connecting rod, and a parting surface is not selected at the middle position of the thickness direction of the forging die cavity, but is translated by 5-12 mm from the middle plane of the thickness direction to the upper die direction. The method comprises the following specific steps:
1) blanking: sawing or shearing according to the size and material required by the process design;
2) heating: heating the blank material to 1180-1250 ℃ by adopting a rapid or little oxidation-free mode;
3) blank preparation: adopting a roll forging or wedge cross rolling mode to roll the blank material to be thin according to the requirement and increase the length;
4) forging: placing the blank material which is rolled and formed according to requirements into a pre-forging die which is preheated to 200-250 ℃ for forging, wherein the cavity parting surface of the pre-forging die translates 5-12 mm towards the upper die direction, and the parting surface of the finish-forging die cavity is the middle position in the thickness direction of the forge piece; the flash position formed in the forging process is changed in the pre-forging process step, the flash position is reflected on the streamline form of the parting surface after finish forging, the flash position is consistent with the appearance of the connecting rod forge piece, the streamline form is continuous and complete, and has no disorder, backflow and other forms, while the flash position formed in the pre-forging parting surface position is completely wrapped in the cavity of the finish forging die after finish forging forming, and the body of the connecting rod is not exposed;
5) trimming and punching: removing flash and connecting skin of the large and small connecting rod holes formed after finish forging;
6) thermal correction: and (4) putting the connecting rod forging onto a correction die, and carrying out coining on the big end and the small end of the connecting rod.
Claims (1)
1. A method for forging a full-flow connecting rod of a forging parting surface comprises the following specific steps:
1) blanking: processing a blank by a sawing machine or a shearing machine according to the size and the material required by the process design;
2) heating: heating the blank material to 1180-1250 ℃ by adopting a rapid or little oxidation-free mode;
3) blank preparation: adopting a roll forging or wedge cross rolling mode to roll the blank material to be thin according to the requirement and increase the length;
4) forging: placing a blank material which is rolled and formed according to requirements into a pre-forging die which is preheated to 200-250 ℃ for forging, translating a die cavity parting surface of the pre-forging die to the direction of an upper die by 5-12 mm, and positioning a parting surface of a die cavity of a finish-forging die at the middle position of the thickness direction of a forge piece, namely the position of a flash formed in the forging process, wherein the position is changed in the pre-forging step, and the lower die of the pre-forging die protrudes upwards along the periphery of the flash;
5) trimming and punching: removing flash and connecting skin of the large and small connecting rod holes formed after finish forging;
6) thermal correction: and (4) putting the connecting rod forging onto a correction die, and carrying out coining on the big end and the small end of the connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610985460.3A CN106623749B (en) | 2016-11-09 | 2016-11-09 | Method for forging full-flow connecting rod of forging parting surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610985460.3A CN106623749B (en) | 2016-11-09 | 2016-11-09 | Method for forging full-flow connecting rod of forging parting surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106623749A CN106623749A (en) | 2017-05-10 |
| CN106623749B true CN106623749B (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610985460.3A Active CN106623749B (en) | 2016-11-09 | 2016-11-09 | Method for forging full-flow connecting rod of forging parting surface |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111558651B (en) * | 2020-05-13 | 2021-09-14 | 上海长特锻造有限公司 | Three-arm workpiece production process and workpiece produced by using same |
| CN112108607B (en) * | 2020-08-12 | 2022-05-20 | 沈阳中钛装备制造有限公司 | Forming method of titanium alloy vehicle door hinge forging |
| CN114110005A (en) * | 2020-08-31 | 2022-03-01 | 东风锻造有限公司 | Connecting rod for forging special flow line on parting surface and forming method thereof |
| CN112935162A (en) * | 2021-01-29 | 2021-06-11 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Method for selectively lubricating and forming large-scale aluminum alloy edge strip type forge piece |
| CN113641155A (en) * | 2021-07-23 | 2021-11-12 | 连云港杰瑞自动化有限公司 | High-temperature forging detection control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201693113U (en) * | 2010-05-14 | 2011-01-05 | 湖北巨力锻造有限公司 | Cylinder bracket forging die |
| CN102371326B (en) * | 2010-08-20 | 2014-03-12 | 上海交大中京锻压有限公司 | Preforging mould structure for processing shaft fork part stamp forgings |
| CN201889385U (en) * | 2010-11-16 | 2011-07-06 | 上海交大中京锻压有限公司 | Finish-forging die structure of stainless steel die forging product |
| CN202986671U (en) * | 2012-11-19 | 2013-06-12 | 芜湖三联锻造有限公司 | Automobile outer wheel hub forging structure |
| CN103192017B (en) * | 2013-03-22 | 2015-05-13 | 江苏保捷锻压有限公司 | Flange type forge piece based die splitting method for optimizing die forging force and device of method |
| CN203330322U (en) * | 2013-03-22 | 2013-12-11 | 江苏保捷锻压有限公司 | Die parting device based on flange type forging and optimizing die forging force |
| CN103640691A (en) * | 2013-12-09 | 2014-03-19 | 无锡透平叶片有限公司 | Titanium alloy rocker die forging structure |
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