Double-drive hole wall machining system and method

Abstract

The invention discloses a double-drive hole wall machining system and method for reinforcing inner surfaces of slender holes with small apertures. The lower end of a first connecting rod is connectedto the middle part of a crankshaft; the upper end of the first connecting rod is connected to the lower end of a first piston; the upper end of the first piston extends into a piston cylinder from thebottom of the piston cylinder; workpieces with upper and lower vertical workpiece holes are placed in the piston cylinder right above the first piston; a second piston is right above the workpieces;the lower section of the second piston extends into a sealing cover; the upper end of the second piston is connected to the lower end of a second connecting rod; the upper end of the second connectingrod is connected to the middle part of a second crankshaft; a liquid supply system can inject and discharge liquid in and out from a cavity of the piston cylinder; a controller respectively controlsa vertical moving worktable, a first driving motor, a second driving motor and the liquid supply system; through quick reciprocating movement of the pistons in the sealing cavity, the size of liquid in holes to be reinforced is changed to change the liquid pressure, so that the hole walls are plastically deformed to a certain extent, and the reinforcement of the hole walls is achieved; and under coaction of two pistons, the cavitation effect is better.

Description

technical field [0001] The invention belongs to the field of hole wall processing, and is particularly suitable for the technology of strengthening the inner surface of elongated holes with small diameters. Background technique [0002] Mechanical equipment and its parts tend to be miniaturized, and there are often various slender holes in the components, but the slender holes in the components are weak parts of fatigue, and the stress is relatively concentrated, which often leads to microcracks or even cracks around the slender holes. The phenomenon of fracture greatly reduces the service life of the equipment. In order to reduce the impact of holes on the fatigue life of components, it is usually necessary to strengthen them, so there is an urgent need for technologies that can effectively strengthen these elongated hole walls with large aspect ratios. [0003] Cavitation strengthening technology is a new type of surface processing technology. This technology uses high-sp...

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Problems solved by technology

The Chinese Patent Publication No. is CN105907942A, and the device disclosed in the literature titled "A Device for Underwater Laser Cavitation Strengthening Bushing and Its Strengthening Method", although it can strengthen the inner surface of the workpiece, the device cannot Its laser processing head must extend into the inside of the sleeve workpiece, so it is difficult for this device to strengthen the inner surface of the workpiece with a small inner diameter

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