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Metal double-laser-beam impact forging low-stress welding device and method

A welding method and laser welding technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of low heating efficiency, reduced stress, and increased complexity of the welding piece heating device, and achieve great economic benefits and social benefits. Benefit, reduce welding residual tensile stress, save the effect of special heating equipment

Inactive Publication Date: 2017-11-07
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0003] At present, the most common method to eliminate residual stress is to carry out welding treatment and post-welding heat treatment on the welded workpiece. The welding treatment refers to a series of treatment measures carried out near the welded area while performing the welding operation, mainly including Rolling with welding, rotary extrusion with welding, hammering with welding, vibration welding, chilling with welding, pre-stretching with welding, and electromagnetic induction with welding. The existing welding processing technology lacks intelligence and precision. The processing of welded parts with complex structures has certain limitations and cannot better eliminate weldment defects; post-weld heat treatment refers to a treatment measure applied to the welded parts after the welding operation is completed, that is, the welded parts are heated to a certain temperature And heat preservation for a certain period of time, using the reduction of the yield limit of the material at high temperature, the place with high internal stress will produce plastic flow, the elastic deformation will gradually decrease, and the plastic deformation will gradually increase to reduce the stress
Post-weld treatment is the treatment after the welding area is cooled. Its plastic deformation is small, and it is difficult to completely eliminate internal residual stress, deformation, micro-cracks and other defects. The complexity of the weldment heating device increases with the size and structure of the deposited parts. The increase in resistance will be multiplied, and the heating efficiency after the weldment is cooled is low, wasting energy

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Embodiment Construction

[0015] In order to make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the implementation of the present invention. example, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0016] figure 1 It is a step of a specific implementation mode provided by the present invention.

[0017] like figure 2 As shown, a new type of impact forging low-stress welding device, including laser welding system, laser impact forging system, intelligent online monitoring and detection system.

[0018] (1) In the above structure, the workpiece to be welded is in...

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Abstract

The invention discloses a metal double-laser-beam impact forging low-stress welding device and method. The device comprises a laser welding system, a laser impact forging system and an intelligent detection control system. The method comprises the steps that 1, the laser welding system heats the surface of a metal workpiece via a high energy laser beam through heat effect radiation for welding, and at the same time, a second short pulsed laser beam conducts impact forging on a welding area within the forging temperature range through an impact wave mechanical effect; and 2, laser welding parameters like pulse width, energy, peak power and repetition frequency and the impact forging parameter are restricted and cooperate mutually, and the optimal temperature area and size range of laser impact forging and the impact strengthening parameter are determined. The heat effect and the impact wave mechanical effect are fully utilized through the two laser beams, time and labor are saved, special heating equipment is omitted, internal residual stress of weldments can be eliminated or relieved, damage of welding residual stress can be avoided or reduced, and great economic benefits and social benefits are brought.

Description

technical field [0001] The invention relates to the technical field of metal low-stress welding, in particular to a metal double laser beam low-stress impact forging welding device and method. Background technique [0002] Welding refers to a connection method in which two solid objects separated from each other generate atomic or intermolecular bonding forces through appropriate physical and chemical processes to form a whole. Laser welding is an efficient and precise welding method using laser as an energy carrier. It is one of the important aspects of the application of laser processing material processing technology. In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process is of heat conduction type, that is, Laser radiation heats the surface of the workpiece, and the surface heat diffuses to the interior through heat conduction. By controlling the parameters such as the width, energy, peak power and repetition frequen...

Claims

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Application Information

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IPC IPC(8): B23K26/21B23K26/00
CPCB23K26/21B23K26/356
Inventor 张永康秦艳杨青天
Owner GUANGDONG UNIV OF TECH
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