Hydraulic-driving type miniature tapered hole inner surface cavitation shot-blasting system and method

Abstract

The invention discloses a hydraulic-driving type miniature tapered hole inner surface cavitation shot-blasting system and method. The two ends of a horizontal connecting rod are each fixedly connectedwith a first bevel gear. The lower segments of two vertical lead screws are each fixedly connected with a second bevel gear engaged with the corresponding first bevel gear. One end of the connectingrod is connected with a motor. A horizontal cover plate is connected between the upper ends of two sliding blocks. The lower end of each sliding block is connected with the corresponding lead screw through threads. A workpiece is vertically arranged on the bottom surface of the interior of a first oil tank. A cylinder is located over the workpiece. An oil cylinder is arranged over the cylinder. Anupper piston is arranged in an inner cavity of the oil cylinder. A lower piston is arranged in an inner cavity of the cylinder. A piston rod is fixedly connected between the upper piston and the lower piston. Oil holes are formed in the side walls of the upper end and the lower end of the oil cylinder correspondingly. The two oil holes are connected with reversing valves correspondingly. Throughreciprocating movement of the pistons, the volume of sealed liquid in a miniature tapered hole is continuously changed, a cavitation phenomenon is caused, shot blasting is performed on the inner surface of the tapered hole, and the good surface quality can be obtained.

Description

technical field [0001] The invention belongs to the field of fluid cavitation processing, and relates to a cavitation generation and processing method, which is mainly suitable for shot peening strengthening of the inner surface of a micro-cone hole of a cylindrical workpiece. Background technique [0002] A large number of equipment and parts are developing in the direction of miniaturization, miniaturization and light weight, which makes the processing size of parts smaller and smaller. Among them, tapered channels are widely used in some parts to meet certain functional requirements, and there are high requirements for the surface quality of the channels, such as titanium alloy pipes and important structural parts for aircraft fluid delivery. These titanium alloy pipes are mainly The airtight connection is realized through the cooperation of the tapered hole and the tapered surface, which requires the tapered hole not only to have high shape accuracy, but also to have goo...

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Problems solved by technology

[0004] In order to overcome the problems existing in the current tapered hole strengthening process, the present invention provides a hydraulically driven micro-cone hole inner surface cavitation shot peening system and its cavitation shot peening method. The shot peening efficiency is high, the quality is good, and the cone hole is effectively improved. Fatigue strength of inner surface

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