The invention is a hole wall strengthening method and device based on
laser shock wave technique, relating to the
laser machining field. And the invention firstly determines the corresponding reflecting cone
diameter according to the principle of cooperation of
hole size and hole shaft of a to-be-machined workpiece,
coating energy absorbing layer material on the concial surface of the reflecting cone and then inserting the reflecting cone in the workpiece, installing the workpiece on a clamp, injecting constraint layer in the to-be-machined hole; a
laser generates a laser pulse which irradiates the
energy absorbing layer through light guiding
system and constraint layer, and the
energy absorbing layer absorbs the laser energy to vaporize, ionize, form
plasma explosion, generate
high amplitude shock wave, and strengthen the hole wall. And the invention can strengthen the walls of holes with larger diameters and strengthen the walls of micropores. And the strength and
hardness of the strengthened hole wall are remarkably improved, and the
surface layer has helpful remaining
compression stress and it can obtain higher size accuracy and lower
surface roughness and directly act as the final procedure of hole
machining.