Improvement of Cold Stamping Technology of Stainless Steel Balls for Aeronautical Bearings

A cold stamping and stainless steel technology, which is applied in the field of cold stamping technology improvement of stainless steel balls for aviation bearings, can solve problems such as stamping cracks, and achieve the effects of thin ring belt, reduction of raw material loss and cost saving.

Active Publication Date: 2021-11-26
AVIC HARBIN BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that stamping cracks often occur in the existing stainless steel ball during cold heading processing, and to provide an improvement in the cold stamping technology of stainless steel balls for aviation bearings

Method used

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  • Improvement of Cold Stamping Technology of Stainless Steel Balls for Aeronautical Bearings
  • Improvement of Cold Stamping Technology of Stainless Steel Balls for Aeronautical Bearings
  • Improvement of Cold Stamping Technology of Stainless Steel Balls for Aeronautical Bearings

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specific Embodiment approach 1

[0021] Specific implementation mode 1: In this implementation mode, the improvement of the cold stamping technology of stainless steel balls for aviation bearings is completed according to the following steps:

[0022] 1. Improvement of the mold: With the inner diameter of the mold unchanged from 4.64mm to 4.68mm, the ball height R2 of the mold is adjusted from the original 2.15mm to 2.19mm to 2.64mm to 2.68mm, and the improved tire is obtained. Tool;

[0023] 2. Cold stamping: The polished steel material is brought into the steel ball cold heading machine by the guide wheel, cut off, and then sent to the improved mold for cold stamping to obtain the cold stamped ball blank.

[0024] The beneficial effect of this implementation mode:

[0025] This embodiment improves the cold stamping technology of stainless steel balls for aerospace bearings. While keeping the inner diameter of the mold unchanged, the ball height of the mold is adjusted, and then the cold stamping is perform...

specific Embodiment approach 2

[0026] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the spherical height R2 of the mold is adjusted from the original 2.15 mm to 2.64 mm to obtain an improved mold.

[0027] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is: as described in step 2, the polished steel material is brought into the steel ball cold heading machine by the guide wheel, according to the size of the ball height R2 of the mold Cut off.

[0029] Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses an improvement of the cold stamping technology of steel balls made of stainless steel materials for aviation bearings, and relates to the technical field of steel ball cold heading forming. The purpose of the present invention is to solve the problem that stamping cracks often occur in the existing stainless steel balls during the cold heading process. Method: Mold improvement: Under the condition that the inner diameter of the mold remains unchanged, adjust the ball height R2 of the mold from the original 2.15mm-2.19mm to 2.64mm-2.68mm to obtain the improved mold; cold stamping: The polished steel material is brought into the steel ball cold heading machine by the guide wheel, cut off, and then sent to the improved mold for cold stamping to obtain the cold stamped ball blank. The invention can obtain the improvement of the cold stamping technology of the stainless steel ball of the aviation bearing.

Description

technical field [0001] The invention relates to the technical field of cold heading forming of steel balls, in particular to the improvement of the cold stamping technology of steel balls made of stainless steel for aviation bearings. Background technique [0002] The company is mainly responsible for supporting the main shaft bearings of military aircraft engines. In order to meet the requirements of the bearing structure and operating environment of aviation motors, the bearing parts are mostly made of stainless steel materials. 9Cr18 steel belongs to high carbon and high chromium martensitic stainless steel. It has high hardness, high wear resistance and corrosion resistance after quenching. Some rolling elements and rings of aviation bearings are made of this material and are used in humid and harsh environments. Has good corrosion resistance. However, the cold plastic deformation ability of stainless steel is poor. When the blank is cold stamped in the initial stage of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/02B21K1/02B21J5/00B24B1/00
CPCB21D22/02B21J5/002B21K1/02B24B1/00
Inventor 麻俊娟李博翰王强丁立军焦广德
Owner AVIC HARBIN BEARING
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