Internal expanding fixture with automatic discharging function

Abstract

The invention relates to an internal expanding fixture with an automatic discharging function. The internal expanding fixture comprises a fixture body connected with a spindle of a numerical control machine tool, and a movable connecting rod, a fixed core spindle and an expanding sleeve which are arranged inside the fixture body. The internal expanding fixture is characterized in that the fixture body is provided with a fixed cylinder left end cover and a movable cylinder right end cover; the cylinder left end cover and the cylinder right end cover are sleeved on the connecting rod; a gas inner cavity A and a gas inner cavity B are formed between the connecting rod and the fixture body; a pushing rod which can be used for detaching a workpiece which is sleeved on the expanding sleeve is arranged on the cylinder right end cover; the connecting rod, the cylinder left end cover and the fixture body are provided with airflow channels; and the airflow is fed into the gas inner cavity A from an air port B through the communicated airflow channels. The workpiece can be automatically discharged after parts are machined, the condition of whether the parts to be machined are mounted in place or not can be detected, the automaticity of the machine tool can be improved, and the internal expanding fixture has the characteristics of improving the product yield and quality, reducing the production cost and the labor intensity and improving the production efficiency.

Description

technical field [0001] The present invention relates to a machine tool fixture, in particular to an internal expansion fixture with automatic unloading function. Background technique [0002] For the processing of gearbox gear parts on CNC lathes, the internal expansion fixture is an indispensable functional part. If there is no internal expansion fixture to support the workpiece, the processing will be difficult to complete. [0003] The existing internal expansion fixture has only one structural form: it is composed of a fixture body, mandrel, expansion sleeve and connecting rod, etc., and the internal expansion sleeve is pulled by the connecting rod to tighten the gear-like workpiece. This technology adopts the method of manual loading and unloading, relying solely on the experience of the operator to determine whether the parts are good, and after the processing is completed, the operator manually removes the parts. In this way, the scrap rate of workpieces caused by hu...

AI Technical Summary

Problems solved by technology

In this way, the scrap rate of workpieces caused by human factors increases, and the labor intensity and processing efficiency of laborers are relatively low.

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