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Laser welding connection method of automobile drive axle differential housing and driven bevel gear

A technology of laser welding and differential gear, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of reduction, simplification of unfavorable structure design, cost, and complicated manufacturing and processing, so as to reduce production cost, The effect of small deformation and weight reduction

Active Publication Date: 2010-11-17
FAW GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the previous manufacturing process of light car drive axle, the connection method of the differential case made of ductile iron and the driven bevel gear made of carburized steel is connected by bolts; this method is more complicated in manufacturing and processing, which is not conducive to the structure Design simplification and cost reduction

Method used

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  • Laser welding connection method of automobile drive axle differential housing and driven bevel gear

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Assemble the differential case of the automobile drive axle with the driven vertebral teeth, and clamp the assembled assembly on the chuck of the tiltable CNC rotary table, so that the weldment can be rotated as required during the welding process to achieve Different welding speeds. He-Ne laser beam is used for laser positioning, and the focused laser beam is transmitted to the welding area for laser welding. The laser incidence mode is radial incidence, and the defocusing distance of the laser beam focus is -3mm~+3mm. During the laser welding process, the output laser power of the laser is 1kW~3kW; the welding speed is 0.5m / min~3m / min; the laser wire filling welding method must be used, and the specific welding wire is fed at a certain speed (0.5m / min~3m) by the wire feeding device. / min) to the welding seam, the diameter of the welding wire is 0.5mm~2mm; the angle between the wire feeding direction and the welding direction is 75°, and the welding wire axis and S 1...

Embodiment 2

[0012] Assemble the differential housing and the driven vertebral teeth, clamp the assembled assembly on the tiltable CNC workbench, and make the weldment rotate as required during the welding process to achieve different welding speeds. Laser positioning is performed using a He-Ne laser beam so that the laser beam can be delivered to the welding area. The incident mode of the laser is axially incident, and the distance between the incident point and the axis is 90mm to 100mm. Focus defocus of laser beam is -3mm~+3mm; laser power used in welding is 4kW~8kW; welding speed is 1m / min~4m / min; laser wire filling welding is used, wire feeding speed is 1m / min~4m / min, the diameter of the welding wire used is 0.5mm~2mm; the angle between the wire feeding direction and the welding direction is 125°, and the welding wire axis and S 2 Plane angle γ=0°, and S 1 Plane angle 0°1 ≤2mm, distance from laser beam focus -3mm≤L 2 ≤3mm. During the welding process, one or several gases in nitro...

Embodiment 3

[0014] like figure 1 As shown, the dotted circle is the welding trajectory line, and its plane is S 1 , tangent to the welding trajectory and perpendicular to S 1 The plane of S 2 . The focused laser beam axis and S 2 The angle between the plane is α, and S 1 The angle between the planes is β. Similarly, wire axis and S 2 The included angle of the plane is γ, and S 1 The angle between the planes is δ. The distance from the end of the welding wire to the centerline of the weld is L 1 , the distance from the focal point of the laser beam is L 2 .

[0015] Assemble the differential housing and the driven vertebral teeth, and then clamp them on the tiltable CNC workbench, so that the weldment can be rotated as required during the welding process to achieve different welding speeds. Laser positioning is performed using a He-Ne laser beam so that the laser beam can be delivered to the welding area. The laser incidence method adopts oblique incidence, and the focus defocu...

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Abstract

The invention relates to a laser welding method of an automobile drive axle differential housing and a driven bevel gear, which is characterized by comprising the following concrete steps: positioning and clamping the differential housing and the welding end surface of the driven bevel gear by adopting a special clamp with positioning and clamping functions; clamping the clamped assembly on a numerically-controlled rotary working table; transmitting the focused laser beams to a welding zone by adopting a light guide system of a reflective focusing structure; and carrying out coaxial positioning by utilizing He-Ne lasers. Because the differential housing is made of nodular cast iron and the driven bevel gear is made of carburizing steels, a laser filler wire welding method needs to be adopted, and a wire feeder is used for feeding specific welding wires to welding seams at the rate of 0.5m / min-9m / min. In the welding process, nitrogen gas, helium gas or argon gas are used for protecting a molten pool. The invention has the advantages of high connection strength, small heat affected zone and small deformation, can achieve the using requirement, simplifies the structure, lightens the weight and reduces the production cost.

Description

technical field [0001] The invention relates to a laser welding connection method between an automobile drive axle differential case and a driven bevel gear, and belongs to the technical field of laser welding. Background technique [0002] In the previous manufacturing process of light car driving axle, the connection method of the differential case made of ductile iron and the driven bevel gear made of carburized steel is connected by bolts; this method is more complicated in manufacturing and processing, which is not conducive to the structure Design simplification and cost reduction. Contents of the invention [0003] The object of the present invention is to provide a laser welding method for the differential case of the automobile drive axle and the driven bevel gear, which has the characteristics of low cost, simple structure, and material saving, and is in line with the development trend of automobile lightweight and energy saving. Consistent; and laser welding ha...

Claims

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Application Information

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IPC IPC(8): B23K26/24B23K26/42B23K26/04B23K26/12B23K26/21B23K26/70
Inventor 姚远魏伟郑培和陈明秦芳李潇一喻皓淳孔德举
Owner FAW GROUP
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