Fixing device used for machining long-cylinder thin-walled parts

Abstract

A fixing device used for machining long-cylinder thin-walled parts comprises a pull rod I, a pull rod II and positioning blocks. One end of the pull rod I and one end of the pull rod II are provided with threads respectively. Connectors are arranged at the threaded end of the pull rod I and the threaded end of the pull rod II respectively. The pull rod I and the pull rod II are connected with the connectors through the threads. The positioning blocks are arranged at the connectors of the pull rod I and the pull rod II respectively. A fixing screw sleeve is arranged at the right end of the connector of the pull rod II. The pull rod I and the pull rod II are fixedly connected. According to the fixing device, the positioning blocks are tensioned through the pull rods, the positioning blocks and the parts are in clearance fit, and therefore the fixing device can be conveniently clamped and detached, time and labor are saved when the fixing device is used, and meanwhile the manufacturing cost is saved. Traditional inner hole pressing is replaced with end face pressing, the part deformation is reduced, and the percent of pass of the parts is greatly increased.

Description

technical field [0001] The invention relates to the technical field of mechanical processing tooling, in particular to a fixing device for processing long-tube thin-walled parts. Background technique [0002] Whether the positioning and clamping of long-tube thin-walled parts is reasonable in machining determines the size of the deformation of the part and directly affects the machining accuracy of the part. Due to the long length and thin wall thickness of the long tube and thin-walled parts, it is difficult to clamp the parts during the machining process, the parts are easily deformed, and the radial dimensional accuracy is difficult to guarantee. The general processing process of this type of parts is as follows: rough turning - heat treatment - semi-finishing turning - heat treatment - finishing turning - grinding - pliers. The interference fit is adopted between the head and the parts, and the positioning and clamping of the parts are realized simultaneously through th...

AI Technical Summary

Problems solved by technology

The disadvantage of using this kind of tooling for processing is: in order to ensure the safety and reliability of processing, the plug and the parts need to be fitted with an interference fit, and the installation of the plug must apply external force. After the parts are processed, the removal of the plug is very difficult and time-consuming. Laborious; The outer circle of the plug is ground one-to-one according to the hole size of the part to meet a certain amount of interference and ensure the safety of the part processing. Therefore, a set of plugs can only be used once, resulting in a great waste of tooling , which increases the processing cost of the part; when the turning and grinding of the outer circle of the part is completed and the plug of the interference fit is removed by external force, the radial deformation of the part is very large, and the accuracy of the outer circle and inner hole at both ends of the part cannot be guaranteed

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