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Solid two-half-retainer two-sided electrical riveting processing method

A processing method and cage technology, which is applied in the field of bearing riveting, can solve problems such as insufficient adhesion between cold heading nail heads and cages, separation between rivets and cages, and reduced fracture resistance, achieving stable and controllable quality, Avoid rivet breakage and improve riveting strength

Inactive Publication Date: 2016-01-20
AVIC HARBIN BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the lack of closeness between the cold heading rivet head and the cage in the existing bearing riveting, which leads to the gap between the rivet and the cage after the rivet is riveted, and the existing cold heading rivet head has cold work hardening phenomenon, Due to the problem of reduced fracture resistance, a method of electric riveting on both sides of the solid double-half cage is provided

Method used

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  • Solid two-half-retainer two-sided electrical riveting processing method
  • Solid two-half-retainer two-sided electrical riveting processing method
  • Solid two-half-retainer two-sided electrical riveting processing method

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specific Embodiment approach 1

[0039] Specific implementation mode 1: This implementation mode is a method of electric riveting on both sides of a solid double-half cage, which is specifically completed according to the following steps:

[0040] 1. Nail cutting: When calculating single-sided electric riveting, the length L of the end surface of the rivet rod exposed to the cage 1 , according to the length L 3 Cut the rivet wire to obtain the length L 3 rivet rod, and L 3 = 2L 1 +L 2 , L 2 is the depth of the rivet hole to be riveted; then the length is L 3 The rivet rod is subjected to stress relief annealing treatment and deburring acute angle treatment in turn to obtain the rivet rod to be riveted;

[0041] 2. Preparation of nailed tires:

[0042] Prepare the nailing mold with annular groove according to the bearing to be riveted. The depth of the nailing mold groove ensures that the length D of the end surface of the cage is exposed after the rivet rod to be riveted is inserted into the rivet hole...

specific Embodiment approach 2

[0062] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the length L of the end surface of the cage to be riveted by the rivet rod to be riveted in step 1 1 =k 1 d, d is the diameter of the rivet rod to be riveted, k 1 is a coefficient, and when d=Φ1.0, k 1 =1.7; when d=Φ1.2, k 1 =1.65; when d=Φ1.5, k 1 =1.55; when d=Φ2.0, k 1 =1.52; when d=Φ2.5, k 1 =1.43; when d=Φ3.0, k 1 = 1.40. Others are the same as the first embodiment.

specific Embodiment approach 3

[0063] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the rivet wire in step 1 is ML15 steel wire, 1Cr18Ni9 steel wire or 1Cr18Ni9Ti steel wire. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a solid two-half-retainer two-sided electrical riveting processing method, relates to a bearing riveting method, and aims to solve the problems that rivets and retainers have an open-joint phenomenon after the rivets are riveted due to the fact that existing bearing riveting is insufficient in sealing degree between cold heading rivet heads and the retainers, and fracture resistance is reduced due to the fact that cold heading rivets have a cold hardening phenomenon. The processing method comprises the following steps: I, cutting rivets; II, preparing a rivet loading mould; III, preparing a riveting mould including (1) a riveting upper mould, (2) a first-side riveting lower mould and (3) a second-side riveting lower mould; and IV, riveting: (1) loading rivets and racking; (2) carrying out first end-surface rivet electrical riveting; and (3) carrying out second end-surface rivet electrical riveting, thereby completing solid two-half-retainer two-sided electrical riveting processing. The solid two-half-retainer two-sided electrical riveting processing method has the advantages that: a bearing has no abnormality after operating for 1250 hours. The solid two-half-retainer two-sided electrical riveting processing method is mainly used for carrying out solid two-half-retainer two-sided electrical riveting on the bearing.

Description

technical field [0001] The invention relates to a bearing riveting method. Background technique [0002] The riveting quality and riveting strength of the rivets determine the strength of the bearing cage and directly affect the service life and reliability of the bearing when it is working. [0003] At present, domestic double-half cage aviation bearings have low riveting strength, especially for bearings under high-speed and high-frequency vibration conditions. During use, the rivet head breaks, elongates, and the cage breaks often occur, resulting in bearing failure. It is confirmed by analysis that it is related to the insufficient riveting strength of the rivets. [0004] The ferrous metal materials of rivets used for this type of bearing riveting are usually ML15, 1Cr18Ni9, 1Cr18Ni9Ti, etc. The current common process methods in the bearing industry are as follows; [0005] (1) Production of rivets [0006] Rivet wire is used to make rivets through a rivet machine. T...

Claims

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Application Information

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IPC IPC(8): B21J15/08
CPCB21J15/08
Inventor 蒋瑞秋杨树新孙奇王喆卞玉霞王宇石
Owner AVIC HARBIN BEARING
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