A volume alternating microporous inner surface cavitation strengthening device and processing method

Abstract

The invention discloses a volume alternating type micropore inner surface cavitation strengthening device and a machining method of the volume alternating type micropore inner surface cavitation strengthening device. The bottom of a liquid storage box is fixedly connected with a piston cylinder. The upper section of the piston cylinder is located in the liquid storage box. The lower section of thepiston cylinder extends out downwards from the bottom wall of the liquid storage box. The upper end of the piston rod extends into the piston cylinder to be fixedly connected with a piston. The lowerend face of the piston rod is in contact with the outer surface of a horizontal cam. The cam is fixedly arranged on a horizontal cam shaft in a sleeving manner. The cam shaft is fixedly connected with a drive motor. The upper side of the top face of the workpiece is provided with a seal cover. A to-be-machined workpiece is dipped in liquid, by means of reciprocating motion of the piston, pressurehigh-frequency alternating of the seal liquid in micropores to be enhanced is achieved through the piston, the inner surfaces of the micropores to be machined form a frequent cavitation phenomenon, and then strengthening treatment of the inner surfaces of the micropores is achieved by means of a cavitation strengthening machining method. The strengthening method is free of pore diameter limitation and can enhance the inner surfaces of the deep micropores with the diameter smaller than 2 mm. The machined surface is high in precision, the energy consumption is low, and the surface smoothness isgood.

Description

technical field [0001] The invention belongs to the field of metal surface treatment, and specifically relates to a device for strengthening treatment on the inner surface of micropores, especially for metal micropores with a diameter of 2 mm or less. Background technique [0002] With the wide application of modern precision instruments, various microporous components are more and more widely used in aerospace, electrical appliances, automobiles and other fields, but workpieces with micropores are easy to cause stress concentration during use, which greatly affects the The service life of parts. At present, the strengthening treatment of the inner surface of micropores is a difficult point in processing. [0003] The traditional hole inner surface strengthening technology is mainly cold extrusion and mechanical shot peening. The cold extrusion strengthening technology uses a mandrel with a certain amount of interference to slowly pass through the metal micropores, so that ...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the existing metal micropore inner surface strengthening treatment, and propose a volume alternating micropore inner surface cavitation strengthening device and its strengthening processing method, especially for the pore diameter of 2mm and below. Effective strengthening treatment on the inner surface of metal micro-holes and micro-deep holes

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