A motion trajectory control method of laser peening robot for exhaust casing

Abstract

The invention belongs to the surface treatment technology of parts, and relates to a method for controlling the movement trajectory of a laser shot peening robot facing an exhaust casing; the invention determines the position of the exhaust casing through the X, Y, and Z coordinates of the center of the robot flange, By using the R, B and T axes to control the attitude of the exhaust casing installed on the robot wrist flange, it has good operability and control accuracy, and can realize multi-angle incidence of the laser in space, which is the optimization of the incidence angle. It is possible; with this method, the uniformity of the residual compressive stress distribution on the surface of the strengthening area is doubled, and the position and incident angle of each laser spot can be precisely controlled, reducing the damage caused by curved surfaces, structural shielding, and impacts. Adverse effects, improve the uniformity of lap joints at high curvature parts, improve laser accessibility in structurally shielded areas, and improve the surface quality of the area to be strengthened.

Description

technical field [0001] The invention belongs to the surface treatment technology of parts, and relates to a movement trajectory control method of a laser shot peening robot facing an exhaust casing. Background technique [0002] The aero-engine exhaust casing is located at the rear of the engine and is mainly used to fix the turbine components of the engine and output the remaining gas. Exhaust casing is usually cast with high temperature alloy, which bears multiple loads such as high temperature heat flow impact and cyclic load. Laser shot peening is a new type of surface strengthening technology. By using the mechanical effect of laser, local plastic deformation occurs on the surface of the part, forming a residual compressive stress field and a structural strengthening layer, thereby improving high temperature fatigue performance. This technology uses circular or square light spots to overlap and cover the area to be strengthened point by point. The optical path of the l...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to propose a method for controlling the movement track of a laser shot peening robot facing the exhaust casing. Through this method, problems such as low lapping accuracy of curved light spots, structural shading, and casing collision with the light outlet can be solved, and the waiting time can be improved. The accessibility of the laser incident in the strengthening area improves the uniformity of the strengthening effect

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