Ejection device of numerically controlled lathe

Abstract

The invention discloses an ejection device of a numerically controlled lathe, comprising a mandrel (1), a spring (2), a positioning body (3), a screw nut (4), a stop pin (5), a spring (6) and a screw nut (8), wherein the spring (2) is arranged on the mandrel (1), the positioning body (3) is fixed on the mandrel (1) by a screw nut (7), and the stop pin (5) is fixed on the positioning body (3) by the screw nut (4).The mechanical hydraulic pressure ejection method is applied to the ejection device of the numerically controlled lathe, so that end face parallel degree error of the processed workpiece caused by simultaneous motion of clamping of the external diameter or inner diameter of a clamping jaw of a fixture and positioning datum plane is eliminated and workpiece machining accuracy is improved. The device effectively controls product quality and solves the problem of workpiece end face parallel degree error caused by positioning error of the numerically controlled lathe.

Description

technical field [0001] The invention relates to the field of mechanical processing, which is a device for eliminating the parallelism of the processing end surface due to the simultaneous action of radial clamping and axial positioning of the fixture during the processing of a numerically controlled lathe, and particularly relates to a numerically controlled lathe Topping device. Background technique [0002] CNC lathes have been widely used in the bearing industry. They can be used for soft turning or hard turning. Regardless of whether soft turning or hard turning, when loading materials, the outer diameter or inner diameter clamping and positioning reference plane act simultaneously to clamp the workpiece. When this clamping method requires high parallelism of the workpiece, the parallelism of the processed end surface of the workpiece is difficult to meet the technical requirements, especially the end surface of the hard-turned workpiece, and its parallelism is generally...

AI Technical Summary

Problems solved by technology

When this clamping method requires high parallelism of the workpiece, the parallelism of the processed end surface of the workpiece is difficult to meet the technical requirements, especially the end surface of the hard-turned workpiece, and its parallelism is generally required to be below 0.02mm. It is even more difficult to meet the requirements. , the main reason is that during manual loading, the outer diameter or inner diameter jaws of the fixture and the positioning reference surface act simultaneously to clamp the workpiece. In this way, the workpiece positioning reference cannot fully contact with the positioning surface of the fixture, and there is a certain inclination. Therefore, there is also a corresponding inclination between the surface of the processed part and the positioning reference plane, which is the root cause of the difficulty in controlling the parallelism between the end surface of the processed workpiece and the reference plane

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