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Laser welding method for carburized gear wheel of automobile gearbox

A technology of automobile gearbox and laser welding, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems that the flexibility is not as good as laser welding, etc., and achieve the effects of flexible welding, improved productivity, and simplified manufacturing process

Active Publication Date: 2006-10-25
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electron beam welding needs to be carried out under vacuum conditions and generates X-rays, and its welding flexibility is not as good as laser welding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weld the first-speed gear and cone assembly of the CAS5-20 gearbox. The steps are (1) Carburize the welded surface of the gear so that there is no carburized layer after the gear is carburized; Before the parts are carburized, the anti-carburizing paint is placed on the surface of the laser welding by brushing or automatic spraying, and the width w of each welding surface coating area from the center line of the weld is 2mm; each welding end surface coating area The width from the upper surface of the weld is 4mm; after carburizing, tempering, shot peening, etc., the gear parts to be welded are press-fitted together, ready for laser welding.

[0014] (2) Clamp the gear on the positioning fixture of the tiltable CNC rotary table, so that the gear rotates as required during the laser welding process to achieve different welding speeds.

[0015] (3) The light guide system adopts the reflective focusing structure to transmit the focused laser beam to the center of the gear weld...

Embodiment 2

[0019] Weld the first-speed gear and cone assembly of the CAS5-20 gearbox. The steps are (1) Carburize the welded surface of the gear so that there is no carburized layer after the gear is carburized; Before the parts are carburized, the anti-carburizing coating is placed on the surface of the laser welding by brushing or automatic spraying. The width w of each welding surface coating area is 4mm from the center line of the welding seam. Each welding end surface coating area is automatically The width of the upper surface of the weld is 6mm; after carburizing, tempering, shot peening, etc., the gear parts to be welded are press-fitted together, ready for laser welding.

[0020] (2) Clamp the gear on the positioning fixture of the tiltable CNC rotary table, so that the gear rotates as required during the laser welding process to achieve different welding speeds.

[0021] (3) A light guide system with a reflective focusing structure transmits the focused laser beam to the center of ...

Embodiment 3

[0025] Weld the first-speed gear and cone assembly of the CAS5-20 gearbox. The steps are (1) Carburize the welded surface of the gear so that there is no carburized layer after the gear is carburized; Before the parts are carburized, the anti-carburizing paint is placed on the surface of the laser welding by brushing or automatic spraying, and the width w of each welding upper surface coating area is 6mm from the center line of the weld; each welding end surface coating area The width from the upper surface of the weld is 8mm; after carburizing, tempering, shot peening, etc., the gear parts to be welded are press-fitted together, ready for laser welding.

[0026] (2) Clamp the gear on the positioning fixture of the tiltable CNC rotary table, so that the gear rotates as required during the laser welding process to achieve different welding speeds.

[0027] (3) A light guide system with a reflective focusing structure transmits the focused laser beam to the center of the gear weldin...

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Abstract

A laser welding method for the carbonized gear in speed variator of car includes such steps as machining, anticarbonizing, carbonizing, quenching, tempering, grinding teeth and laser welding.

Description

Technical field: [0001] The invention relates to a laser welding method after carburizing of an automobile gearbox gear, and belongs to the field of laser welding. Background technique: [0002] Most automobile gearbox gears adopt the carburizing quenching surface strengthening process. At present, the laser welding of automobile gearbox gears is carried out before carburizing; with the rapid development of the automobile industry, high-quality gearbox gears are gradually adopting the gear grinding process. In order to improve gear accuracy and reduce operating noise. However, the gear grinding process needs to be carried out after carburizing and quenching, and the gear assembly cannot be ground due to structural limitations after carburizing and quenching of the welded gear assembly. Similar welding processes include electron beam welding. However, electron beam welding needs to be carried out under vacuum conditions and produces X-rays, so its welding flexibility is not as goo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/20B23K26/06B23K26/12B23K26/42B23K26/24B23K26/60
Inventor 魏伟姚远郑培和陈明喻皓淳孔德举秦芳
Owner CHINA FIRST AUTOMOBILE