A forging method of high-performance bearing steel ball blank

A bearing steel ball, high-performance technology, applied in the field of steel ball parts forging, can solve the problems of ball billet streamline outcropping, uncontrollable flash size, etc., to optimize the streamline distribution, improve the streamline outcrop, reduce Angle effect

Active Publication Date: 2022-07-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the existing forging technology is difficult to solve the problem that a large number of streamlines are exposed at the two poles of the ball blank and the flash edge, and the size of the flash edge cannot be controlled, and provides a forging method of a high-performance bearing steel ball blank

Method used

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  • A forging method of high-performance bearing steel ball blank
  • A forging method of high-performance bearing steel ball blank
  • A forging method of high-performance bearing steel ball blank

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Experimental program
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specific Embodiment approach 1

[0030] Embodiment 1: Combining Figures 1 to 7 Specifically, the forging method for a high-performance bearing steel ball blank described in this embodiment is carried out according to the following steps:

[0031] 1. Feeding:

[0032] Cut the round bar material to obtain a cylindrical material section, grind the upper and lower end faces of the cylindrical material section to ensure that the length of the material section is within the tolerance range, and then chamfer the upper and lower end faces to obtain the processed material section. The latter section is heated to 900°C to 1100°C and kept warm to obtain the heated section;

[0033] The chamfer angle is half of the taper angle in the conical pre-forging die cavity described in step 2; the quality of the processed material section is equal to the quality of the bearing steel ball blank prepared in step 3;

[0034] 2. Pre-forging:

[0035] Before pre-forging, apply lubricant inside the cavity of the conical pre-forging...

specific Embodiment approach 2

[0049] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the upper and lower end faces of the cylindrical material section are ground, so that the length tolerance between the upper and lower end faces is within 0.1 mm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0050] Embodiment 3: The difference between this embodiment and Embodiment 1 or Embodiment 2 is that the material of the round bar described in step 1 is bearing steel 8Cr4Mo4V. Others are the same as in the first or second embodiment.

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Abstract

A forging method for high-performance bearing steel ball blanks belongs to the field of forging steel ball parts. The present invention solves the problems that the existing forging technology is difficult to solve the problems that the two poles of the ball blank and the streamlines at the flash edges are exposed in large numbers, and the size of the flash edges cannot be controlled. Compared with the original process of blanking, heating and forging, the present invention adds pre-forging and lubrication, and adopts the following methods: 1. blanking; 2. pre-forging; 3. final forging. The invention is used for the forging of bearing steel ball blanks.

Description

technical field [0001] The invention belongs to the field of forging of steel ball parts. Background technique [0002] As a basic mechanical component, bearing steel balls are widely used in various fields such as automobiles, high-speed rail, wind power, precision machine tools, and aerospace. Ball blank forming is the central link of steel ball manufacturing, and its forming process has a great influence on the structure and streamline distribution of the steel ball. The forming process scheme of the ball billet can be generally divided into two categories: forging and skew rolling. Due to the Manchester effect of the process itself, skew rolling is prone to looseness and holes in the core, which is not suitable for the manufacture of high-end bearing steel balls. The steel ball obtained by forging has the characteristics of dense structure and no loose core, and is the main processing method for high-end bearing steel balls. [0003] In the existing forging process, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/02B21J13/02B21J3/00B21K1/02B21K27/02B23P15/00
CPCB21J5/02B21J13/02B21J3/00B23P15/00B21K1/02B21K27/02
Inventor 宗影影周鹏文龚雪冬姜宏伟邵斌杨万里童锐单德彬郭斌
Owner HARBIN INST OF TECH
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