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Laser-induced compound welding method for combined-type brake camshaft

A laser induction and composite welding technology, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of inability to meet flexible production and high cost of friction welding equipment, and achieve the elimination of stress concentration and hardened martensite Organization, efficient use of energy, and the effect of reducing cracks and pores

Active Publication Date: 2014-07-16
CHINA FIRST AUTOMOBILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high cost of friction welding equipment cannot meet the needs of flexible production

Method used

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  • Laser-induced compound welding method for combined-type brake camshaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] After assembling the cam 1, the hollow steel pipe shaft body 2 and the spline shaft 3 into a combined brake camshaft, place it horizontally, and position the two ends with the rotary three-jaw chuck 4 and the top 5 respectively. The inductor 6 is moved to the area to be welded, and cooling water is passed inside to ensure that the area is evenly heated at the same time, and the inner circumference of the inductor 6 is 3 cm away from the surface of the workpiece. Fix the laser welding head 7, focus the laser beam on the welding area, and rotate the three-jaw chuck 4 to drive the combined brake camshaft to rotate. At this time, the welding speed is 2m / min. The heating time of the inductor 6 is 5s, and the maximum heating temperature is 500°C. Laser welding starts at the end of heating, the laser welding power is 2000W, and the defocus is 0mm. He gas and compressed air are used to protect the welding pool and optical components during the welding process, and the gas flow ...

Embodiment 2

[0032] After assembling the cam 1, the hollow steel pipe shaft body 2 and the spline shaft 3 into a combined brake camshaft, place it horizontally, and position the two ends with the three-jaw chuck 4 and the top 5 respectively. The inductor 6 is moved to the area to be welded, and cooling water is passed inside to ensure that the area is evenly heated at the same time. The distance between the inner circumference of the inductor 6 and the surface of the workpiece is 5cm. Fix the laser welding head 7, focus the laser beam on the welding area, and rotate the three-jaw chuck to drive the combined brake camshaft to rotate. At this time, the welding speed is 3m / min. The heating time of the inductor 6 is 10s, and the maximum heating temperature is 600°C. Laser welding starts at the end of heating, the laser welding power is 3000W, and the defocus is +1mm. Ar gas and compressed air are used to protect the welding pool and optical components during the welding process, and the gas fl...

Embodiment 3

[0034] After assembling the cam 1, the hollow steel pipe shaft body 2 and the spline shaft 3 into a combined brake camshaft, place it horizontally, and position the two ends with the three-jaw chuck 4 and the top 5 respectively. The inductor 6 is moved to the area to be welded, and cooling water is passed inside to ensure that the area is evenly heated at the same time. The distance between the inner circumference of the inductor 6 and the surface of the workpiece is 4cm. Fix the laser welding head 7, focus the laser beam on the welding area, and use the laser to drive the combined brake camshaft to rotate on the cam 1 and the rotary three-jaw chuck. At this time, the welding speed is 2.5m / min. Inductor 6 is energized and heated for 7s, the maximum heating temperature is 550°C, and then laser welding starts, the laser welding power is 2500W, the defocusing distance is 0.5mm, and the N 2 Gas and compressed air protect the welding pool and optical components during the welding p...

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Abstract

The invention relates to a laser-induced compound welding method for a combined-type brake camshaft. The laser-induced compound welding method includes the steps that the camshaft, a hollow steel tube shaft and a spline shaft are assembled to be the combined-type brake camshaft which is horizontally arranged, one end of the brake camshaft is clamped in a rotary three-jaw chuck while the other end of the same is fixed by the aid of a tip, and a high-frequency inductor surrounds a to-be-welded area; a laser welding head is fixed, and the camshaft, the hollow steel tube shaft and the spline shaft are coaxially positioned by the aid of laser; the rotary three-jaw chuck drives the combined-type brake camshaft to rotate, a welding area is heated through the high-frequency sensor, and welding is performed through the laser welding head and a welding pool and optical components are isolated and protected by adopting protective gas; after welding of the two areas is completed, the well manufactured combined-type brake camshaft is integrally moved out of a clamping area. By the method, post welding deformation is small, generation of cracks and pores is reduced, and production efficiency is high.

Description

technical field [0001] The invention relates to a connection manufacturing method of a combined brake camshaft in the automobile industry. Background technique [0002] In order to reduce the pressure on resources and the environment, energy saving and weight reduction have always been the goals pursued by the automobile manufacturing industry. The hollowing technology of various shaft parts in automobile structure contributes to the realization of this goal. The so-called hollowing technology of shaft parts refers to the use of tubular structural parts to replace the original solid shaft body, which has the effect of reducing weight under the premise of satisfying the performance. The combined brake camshaft is a typical shaft structure using hollow technology, and its three parts need to be welded into one. The material used to manufacture the brake camshaft is medium-high carbon steel with high carbon content. The arc welding method is prone to cracks and deformation, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/346
CPCB23K28/02
Inventor 姚远魏伟郑培和陈明李潇一林革孔德举秦芳张敏高建昊喻皓淳
Owner CHINA FIRST AUTOMOBILE
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