A kind of pressure alternation type microporous inner surface cavitation shot peening equipment and working method

Abstract

The invention discloses pressure-alternated microhole inner surface cavitation and shot blasting equipment and a working method. A positioning device and a magnetic piston motion device arranged faceto face left and right are arranged in an oil tank; an L-shaped baffle plate of the positioning device is fixedly connected with the oil tank; a composite V-shaped block fixedly connected to the bottom wall of the oil tank is arranged under the right side of the L-shaped baffle plate; left and right horizontal workpieces are placed on the composite V-shaped block; the center axis of a cylinder ofthe magnetic piston motion device is collinear with the center axes of microholes; a piston is arranged in a center hole of the cylinder; a sealing cavity can be formed between the microholes and thecenter hole of the cylinder; the right end surface of the cylinder is fixedly connected with an electromagnet; a coil is wound on the electromagnet; two ends of the coil are connected with reversing switches; a driving device is above the magnetic piston motion device; a motor of the driving device can drive a lead screw to rotate; a slide block is matched with the lead screw through a thread; theslide block is fixedly connected with the cylinder; and the volume of liquid in the sealing chamber is continuously changed through a reciprocating motion of the piston for shot blasting reinforcement of the inner surfaces of the microholes so as to achieve high efficiency.

Description

technical field [0001] The invention belongs to the component surface strengthening treatment technology in the field of mechanical manufacturing, in particular to shot peening strengthening equipment suitable for the micropore inner surface of workpieces. Background technique [0002] At present, the parts produced and processed are more precise, lightweight, and have diversified structures, which largely meet the requirements of different fields, especially in high-precision technology-intensive industries such as aerospace and automobiles. Micro-holes have become a common structure in parts. For example, the heat dissipation micro-holes of aero-engine blades, the micro-holes of automobile exhaust pipes, and the micro-holes of molds, etc.; but during the use of workpieces with micro-holes, stress concentration often occurs on the inner surface, and fatigue cracks appear on the surface. It greatly affects the service life of parts. For this reason, various surface strengthe...

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Problems solved by technology

[0004] In order to overcome the limitations of blind hole length-to-diameter ratio, high processing cost and poor surface quality in the traditional hole extrusion strengthening and mechanical shot peening process, the invention provides a pressure alternating type with good processing effect. Microhole inner surface cavitation shot peening equipment and the working method of the equipment for cavitation shot peening, especially suitable for shot peening of small-volume workpieces with a micropore inner diameter less than 1 mm

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