Additive manufacturing forming inner hole surface polishing and strengthening integrated machining system and method

Abstract

The invention discloses a workpiece inner hole surface polishing and strengthening integrated machining system and a method adopting additive manufacturing forming. The system comprises a workbench, an cavitation generation system, a liquid supply circulation system and a controller, the volume alternating mode is adopted to change the volume of liquid in an inner hole of the additive manufacturing forming workpiece to be changed by virtue of the rapid reciprocating motion of a piston, so that the pressure is changed, a hollow bubble group is formed at the inner part of the liquid and an innersurface of the inner hole, and the hollow bubble group is killed along with further compression, so that shock waves and high-speed water jet flows are generated in the liquid medium; a nano-colloidin the inner hole makes full contact with the inner surface of the hole, ultra-fine polishing of the inner surface of the hole is realized, the shock waves and the high-speed water jet flows on an inner wall of the hole, so that a certain amount of plastic deformation is generated on the inner wall of the inner hole, and the reinforcing of the inner surface of the inner hole is realized. The cavitation technology and the nano colloid polishing technology are organically combined, the fatigue life and the surface smoothness of the inner surface of the inner hole are remarkably prolonged, and the requirements on the ultra-smooth surface are reaches.

Description

technical field [0001] The invention relates to the technical field of surface treatment and strengthening of metal materials, and is especially suitable for the surface polishing and strengthening processing technology of inner holes formed by additive manufacturing. Background technique [0002] Additive manufacturing technology is a technology that uses the method of gradually accumulating materials to manufacture solid parts. It has been widely used to manufacture complex components that are difficult to achieve through traditional methods, such as components with micro-deep hole structures. However, with the improvement of manufacturing capacity, higher requirements are placed on the surface quality and service performance of complex structural parts such as additively manufactured metal parts, especially for metal powder direct molding parts with various micro-long holes and complex structures. For rapid manufacturing parts such as precision castings and precision cast...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for additive manufacturing to solve the problems in the prior art that the surface quality of the inner wall of the hole formed by additive manufacturing is poor, fatigue cracks are prone to occur, and the existing surface treatment methods for the inner wall of the hole are lacking. The integrated processing system and processing method of inner hole surface polishing and strengthening can realize the ultra-fine polishing of the inner surface of hole parts manufactured by additive manufacturing, and at the same time realize the strengthening of the inner surface of the hole

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