CN112676506A - Universal joint cross shaft closed forging and forging residual heat normalizing processing technology - Google Patents
Universal joint cross shaft closed forging and forging residual heat normalizing processing technology Download PDFInfo
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- CN112676506A CN112676506A CN202011428246.0A CN202011428246A CN112676506A CN 112676506 A CN112676506 A CN 112676506A CN 202011428246 A CN202011428246 A CN 202011428246A CN 112676506 A CN112676506 A CN 112676506A
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- forging
- normalizing
- precision
- universal joint
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a closed forging and forging residual heat normalizing processing technology for a universal joint cross shaft, which mainly comprises the processing steps of blanking, heating, upsetting, pre-forging, finish forging, normalizing and the like. The invention solves the problem of closed forging process, can reduce the raw material consumption of the forging, fully utilizes forging waste heat, improves the high efficiency of energy utilization, and ensures that the treated forging has fine and uniform metallographic structure and good mechanical property; the flash-free forging is realized, a more accurate forging technology is adopted, the rejection rate of products is reduced, the qualification rate of the products is improved, the energy consumption is greatly reduced, and the production cost of forgings is reduced; the precision of the forged piece is improved, the clamping and positioning of subsequent machining are facilitated, and the machining efficiency is obviously improved; the material utilization rate is improved by about 5 percent, and the problem of waste products caused by the misalignment of the original forged piece is solved; by utilizing the waste heat normalizing process, the normalizing cost of the forge piece can be saved by 0.1 yuan/kg.
Description
Technical Field
The invention relates to the field of universal joint manufacturing processes, in particular to a universal joint cross shaft closed forging and forging residual heat normalizing processing process.
Background
The forging process flow in the prior art mainly comprises raw material blanking, heating, forging, trimming, cooling and normalizing by a normalizing furnace. The prior art scheme has the problems of low utilization rate of forging materials, high rejection rate of products, high energy consumption and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a closed forging and forging residual heat normalizing processing technology for a universal joint cross shaft.
The purpose of the invention is achieved by the following technical scheme: the closed forging and forging residual heat normalizing processing technology for the universal joint cross shaft mainly comprises the following steps of:
1) blanking: the raw material adopts polished steel, the diameter of the raw material is controlled, and a sawing process is adopted;
2) heating: heating by an intermediate frequency furnace;
3) upsetting: forging by adopting a 1600-ton hot die forging press with three stations, upsetting at a first station, and removing oxide skin generated by heating;
4) pre-forging: pre-forging and forming a second station forging die;
5) and (3) precision forging: the third station forge piece is formed by precision forging, a precision forging die adopts a closed forging process, flash-free forging is performed, and a vent hole is designed in the precision forging die;
6) normalizing: after forging, directly entering an after-heat normalizing step, adopting a connecting line mode and adopting an after-heat normalizing process.
The invention has the beneficial effects that: the invention solves the problem of closed forging process, can reduce the raw material consumption of the forging, fully utilizes forging waste heat, improves the high efficiency of energy utilization, and ensures that the treated forging has fine and uniform metallographic structure and good mechanical property; the flash-free forging is realized, a more accurate forging technology is adopted, the rejection rate of products is reduced, the qualification rate of the products is improved, the energy consumption is greatly reduced, and the production cost of forgings is reduced; the precision of the forged piece is improved, the clamping and positioning of subsequent machining are facilitated, and the machining efficiency is obviously improved; the material utilization rate is improved by about 5 percent, and the problem of waste products caused by the misalignment of the original forged piece is solved; by utilizing the waste heat normalizing process, the normalizing cost of the forge piece can be saved by 0.1 yuan/kg.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The invention will be described in detail below with reference to the following drawings:
example (b): as shown in the attached drawings, the closed forging and forging residual heat normalizing processing technology of the universal joint cross shaft mainly comprises the following steps:
1) blanking: the raw material adopts polished steel, the diameter of the raw material is controlled, and the precision of blanking blanks including the end face inclination and the blanking weight can be better controlled by adopting a sawing process, so that burrs after forging are reduced;
2) heating: heating by an intermediate frequency furnace;
3) upsetting: forging by adopting a 1600-ton hot die forging press with three stations, upsetting at a first station, and removing oxide skin generated by heating;
4) pre-forging: pre-forging and forming a second station forging die;
5) and (3) precision forging: the third station forge piece is formed by precision forging, a precision forging die adopts a closed forging process, flash-free forging is performed, and a vent hole is designed in the precision forging die;
6) normalizing: after the forging is finished, the forging directly enters the residual heat normalizing step, a connecting line mode is adopted, and a residual heat normalizing process can be adopted, so that the forging residual heat is fully utilized, the high efficiency of energy utilization is improved, the treated forging is guaranteed, the metallographic structure is fine and uniformly distributed, and the forging has good mechanical performance.
It should be understood that equivalent substitutions and changes to the technical solution and the inventive concept of the present invention should be made by those skilled in the art to the protection scope of the appended claims.
Claims (1)
1. A closed forging and forging residual heat normalizing processing technology for a universal joint cross shaft is characterized in that: the method mainly comprises the following steps:
1) blanking: the raw material adopts polished steel, the diameter of the raw material is controlled, and a sawing process is adopted;
2) heating: heating by an intermediate frequency furnace;
3) upsetting: forging by adopting a 1600-ton hot die forging press with three stations, upsetting at a first station, and removing oxide skin generated by heating;
4) pre-forging: pre-forging and forming a second station forging die;
5) and (3) precision forging: the third station forge piece is formed by precision forging, a precision forging die adopts a closed forging process, flash-free forging is performed, and a vent hole is designed in the precision forging die;
6) normalizing: after forging, directly entering an after-heat normalizing step, adopting a connecting line mode and adopting an after-heat normalizing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011428246.0A CN112676506A (en) | 2020-12-09 | 2020-12-09 | Universal joint cross shaft closed forging and forging residual heat normalizing processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011428246.0A CN112676506A (en) | 2020-12-09 | 2020-12-09 | Universal joint cross shaft closed forging and forging residual heat normalizing processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112676506A true CN112676506A (en) | 2021-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011428246.0A Pending CN112676506A (en) | 2020-12-09 | 2020-12-09 | Universal joint cross shaft closed forging and forging residual heat normalizing processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112676506A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114260415A (en) * | 2021-12-22 | 2022-04-01 | 太仓久信精密模具股份有限公司 | Small flash warm forging forming method for cross joint |
| CN114921622A (en) * | 2022-05-06 | 2022-08-19 | 万向钱潮股份有限公司 | Closed forging and residual temperature normalizing process for automobile hub outer ring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204486684U (en) * | 2015-03-11 | 2015-07-22 | 湖北红岩车桥实业有限公司 | Axle differential cross axle forging processing blocker |
| CN105385816A (en) * | 2015-10-27 | 2016-03-09 | 浙江万向精工有限公司 | Forging waste heat normalizing process for hub bearing unit ferrule |
| CN107617715A (en) * | 2016-07-15 | 2018-01-23 | 万向钱潮股份有限公司 | Close forging technology in automotive hub outer ring |
| CN109161657A (en) * | 2018-11-27 | 2019-01-08 | 江苏润杨汽车零部件制造有限公司 | A kind of residual temperature normalizing process |
-
2020
- 2020-12-09 CN CN202011428246.0A patent/CN112676506A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204486684U (en) * | 2015-03-11 | 2015-07-22 | 湖北红岩车桥实业有限公司 | Axle differential cross axle forging processing blocker |
| CN105385816A (en) * | 2015-10-27 | 2016-03-09 | 浙江万向精工有限公司 | Forging waste heat normalizing process for hub bearing unit ferrule |
| CN107617715A (en) * | 2016-07-15 | 2018-01-23 | 万向钱潮股份有限公司 | Close forging technology in automotive hub outer ring |
| CN109161657A (en) * | 2018-11-27 | 2019-01-08 | 江苏润杨汽车零部件制造有限公司 | A kind of residual temperature normalizing process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114260415A (en) * | 2021-12-22 | 2022-04-01 | 太仓久信精密模具股份有限公司 | Small flash warm forging forming method for cross joint |
| CN114921622A (en) * | 2022-05-06 | 2022-08-19 | 万向钱潮股份有限公司 | Closed forging and residual temperature normalizing process for automobile hub outer ring |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210420 |
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| RJ01 | Rejection of invention patent application after publication |