Workpiece inner wall surface continuous lap-joint-free laser quenching device and quenching method thereof

Abstract

The invention discloses a workpiece inner wall surface continuous lap-joint-free laser quenching device and a quenching method thereof. The workpiece inner wall surface continuous lap-joint-free laserquenching device comprises a laser generator, a collimating mirror and a conical reflector, and the conical reflector extends into an inner cavity of a workpiece; the laser generator emits a laser beam which passes through the collimating mirror to emit into the inner cavity of the workpiece and on a cone surface of the conical reflector, and therefore the laser beam becomes an annular laser beamto be focused on the surface of the inner wall of the workpiece to be processed. The workpiece inner wall surface continuous lap-joint-free laser quenching device and the quenching method have the beneficial effects that the device and method for quenching and strengthening the inner wall of the workpiece by means of annular laser in a linear feeding manner are provided, in the process that the method is used for processing the inner wall of the workpiece, the laser beam is subjected to continuous linear feeding, the condition that heat influence zones are in lap joint is avoided, and the strengthening depth and effect are better and even. In addition, by using the method, the laser beam energy can be more stable, spiral feeding is not needed, and the quenching strengthening efficiency isobviously improved. The device is low in cost, simple in movement mode and has broad market and application prospects.

Description

technical field [0001] The invention relates to the field of laser quenching, in particular to a continuous non-overlapping laser quenching device and a quenching method for the inner wall surface of a workpiece. Background technique [0002] Research at home and abroad shows that laser surface hardening can significantly improve the strength and fatigue life of the workpiece surface, and improve the performance of the workpiece. However, in the process of continuous quenching of the inner wall of the workpiece by the laser, in order to achieve the effect of full surface hardening, there are overlapped areas in the heat-affected zone of the workpiece surface during the spiral feeding process of the laser beam. This will seriously affect the effect of surface treatment and reduce the service life of parts. Contents of the invention [0003] The purpose of the present invention is to provide a continuous non-overlapping laser quenching device and quenching method for the in...

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Problems solved by technology

This will seriously affect the effect of surface treatment and reduce the service life of parts

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