Large roller hot forging process

A large-scale, warm forging technology, applied in the field of large-scale roller warm forging forming process, can solve the problem that the impact resistance and fatigue life of the roller cannot be fundamentally guaranteed and improved, the process stability is not ideal, and the bearing is affected. Service life and other issues, to achieve the effect of improving the internal comprehensive mechanical properties, easy post-process processing, and improving fatigue resistance

Inactive Publication Date: 2007-08-22
XIANGYANG AUTOMOBILE BEARING CO LTD
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AI Technical Summary

Problems solved by technology

[0003] 1. Low production efficiency: Taking the lathe processing technology as an example, the shift production is 850 pieces, and the 24-hour continuous production of a lathe can only reach 2,000 pieces;
[0004] 2. The mechanical properties of the roller are poor: the turning process does not change the intrinsic quality of the raw material, and many knives will be formed on the surface of the roller during turning. Therefore, the impact resistance and fatigue life of the roller cannot be fundamentally guaranteed and Improvement directly affects the service life of the bearing;
[0005] 3. Unsatisfactory process stability: Due to the long process of turning and the variety of cutting tools, i

Method used

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  • Large roller hot forging process

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Example Embodiment

[0031] The warm forging process of the present invention includes the following process steps:

[0032] (1) Cold cut soft abrasive rod material of suitable specifications into material sections, and remove burrs;

[0033] (2) Heat the above-mentioned material section to 120~180℃ and dip it with graphite lubricant;

[0034] (3) Put the above-mentioned material section dipped in graphite lubricant into a medium-frequency induction heating device and heat it to a warm forging temperature below the metal critical point;

[0035] (4) Put the above-mentioned material section with warm forging temperature into the lower die cavity, and drive the upper die cavity to press down through the small tonnage punch equipment, so that the hot material section in the lower die cavity completes the plastic deformation of the roller;

[0036] (5) While the small-tonnage punch equipment drives the upper mold cavity to move upward, the ejector reset mechanism pushes the formed roller out of the lower ...

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Abstract

The large roller hot forging process belongs to the field of roll bearing machining technology. The process includes the following technological steps: cold cutting the soft ground rod into material section and eliminating burrs, heating to 120-180 deg.c before soaking with graphite lubricant, heating in a MF induction furnace to the hot forging temperature below the metal critical point, mold forging to complete the plastic deformation forming the roller, pushing out the roller blank with one pushing mechanism, and cutting off the technological ring from the roller blank. The present invention has the features of high production efficiency, high fatigue tolerance, high impact performance, etc and is used in large roller production.

Description

technical field [0001] The invention belongs to the technical field of processing technology of rollers in roller bearings, and in particular relates to a large-size roller warm forging forming technology. Background technique [0002] In the bearing industry, small-sized rollers (including needle rollers) are generally produced by Z32 series cold heading machines for cold forming technology. Due to the limitation of equipment load, the maximum processing size is about Φ24mm. Large-sized rollers exceeding this size are generally made by lathing. craft. There are following deficiencies in the car manufacturing process: [0003] 1. Low production efficiency: Taking the lathe processing technology as an example, the shift production is 850 pieces, and the 24-hour continuous production of a lathe can only reach 2,000 pieces; [0004] 2. The mechanical properties of the roller are poor: the turning process does not change the intrinsic quality of the raw material, and many kniv...

Claims

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Application Information

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IPC IPC(8): B21J5/02B21J1/06B21J3/00
Inventor 李文忠
Owner XIANGYANG AUTOMOBILE BEARING CO LTD
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