Position-adjustable micro inner hole surface reinforcing system

Abstract

The invention discloses a position-adjustable micro inner hole surface reinforcing system. The position-adjustable micro inner hole surface reinforcing system is characterized in that a workpiece is horizontally arranged at the central position of the bottom of a liquid storage tank; a horizontal micro inner hole is formed at the center of the workpiece; a horizontal tray which is fixedly connected to the liquid storage tank is arranged right above the workpiece; a ball screw is arranged on the upper end of the tray; one end of the ball screw is coaxially connected to an output shaft of a stepmotor through a coupling; spiral directions of threads of two axial half sections of the ball screw are opposite; one half section is connected to a sliding block I, and the other half section is connected to a sliding block II; the lower ends of the sliding block I and the sliding block II are separately fixedly connected to shells of a corresponding motor I and a corresponding motor II; outputshafts of the motor I and the motor II are separately fixedly connected to a corresponding cylindrical cam I and a corresponding cylindrical cam II which are immersed in water; and a vibration sheet Iand a vibration sheet II of corresponding ends are arranged between two ends of the workpiece and the cylindrical cam I as well as the cylindrical cam II. The micro inner hole surface reinforcing system is position-adjustable; and reinforcing efficiency is improved while a high-quality smooth inner surface is acquired.

Description

technical field [0001] The invention belongs to the field of inner surface processing of holes of metal parts, in particular to a strengthening system for micro-hole surfaces, which is suitable for strengthening micro-holes with diameters below 1 mm. Background technique [0002] A large number of micropores exist in mechanical structures, and are usually used for connection, conduction and other occasions. The existence of holes leads to the discontinuity of the structure, so stress concentration occurs, and the stress concentration of holes often leads to fatigue cracks often appearing around, thus affecting the service life of the product. Therefore, improving the fatigue performance of parts with holes is an urgent problem to be solved. In order to improve the fatigue life of holes, a large number of hole strengthening technologies have emerged. At present, the most widely used hole strengthening technologies are mainly cold extrusion and mechanical shot peening. The ...

AI Technical Summary

Problems solved by technology

The strengthening layer of extrusion strengthening is deep and the strengthening effect is excellent, but extrusion is easy to cause scratches on the hole wall, and for parts with super large size, small size or complex shape, it is very difficult to implement hole wall extrusion, even difficult to implement

The mechanical shot peening technology has strong engineering applicability, high efficiency, easy implementation, and less damage to the spray surface, but it is also difficult to strengthen the shot peening technology for micro-holes with relatively large deep diameters.

Chinese application number 201320578759.9 discloses a hole extrusion strengthening device, which drives the extrusion mandrel to move axially through the action of the driving device, and is designed with a slotted bush and an extrusion round table, so that the extrusion mandrel The bushing can be stretched during the movement, so that the stretched bushing can be extruded and strengthened on the inner wall of the hole to be processed, but the mandrel is easily broken during the extrusion process and specific mandrels need to be manufactured according to different holes

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