Automatic centering fixture for annular workpieces

Abstract

The invention discloses an automatic centering fixture for annular workpieces. The automatic centering fixture comprises a support, a motor, a first feed lead screw, a second feed lead screw, a first coupling, a first guide plate and a second guide plate. The motor is fixedly connected with the support, the first feed lead screw is connected with the support by a second coupling, the second feed lead screw is parallel to the first feed lead screw, and the first coupling is connected with the left end and the right end of the first feed lead screw; two slide seats are respectively welded at the lower end of the first guide plate and the lower end of the second guide plate and are respectively connected with the first feed lead screw and the second feed lead screw, a conical tubular mandrel and a positioning column in the shape of a long rod are arranged on the first guide plate, the left portion of the mandrel is large while the right portion of the mandrel is small, and the positioning column is positioned in the center of the mandrel; a circular hole is formed in the second guide plate, and the positioning column penetrates the circular hole and is parallel to the first feed lead screw. The automatic centering fixture has the advantages that the production time can be effectively saved, the movement stability can be improved, and the automatic centering fixture brings convenience for accurately positioning and clamping the annular workpieces.

Description

technical field [0001] The invention relates to a fixture, in particular to an automatic centering fixture for a circular workpiece. Background technique [0002] In mechanical processing, some workpieces need to be positioned and clamped through their inner holes, especially when processing the outer circle and end face of annular pipe fittings. In the past, when processing ring-shaped pipe fittings, one end was often stuck and the other end was pressed for processing, and the end that was held up had to be matched with a wooden plug or a wooden block in the inner hole according to the inner hole of the pipe fitting. Only then can it be processed tightly with the top. However, this method often makes the wall thickness of the pipe fittings uneven. [0003] A centering fixture commonly used now includes a bracket, a motor, a first feed screw connected to the motor through a second coupling, a second feed screw parallel to the first feed screw, and a second feed screw conne...

AI Technical Summary

Problems solved by technology

However, this method often makes the wall thickness of the pipe fittings uneven

[0003] A centering fixture commonly used now includes a bracket, a motor, a first feed screw connected to the motor through a second coupling, a second feed screw parallel to the first feed screw, and a second feed screw connected to the first feed screw. The first coupling and guide plate in the center of the feed screw, because the guide plate is a plane structure, directly center and compress the ring workpiece, and the arc side of the ring workpiece cannot be well positioned and easy to slip, and because it is from the ring workpiece If the outside is pressed and centered, it is not easy to process the outer circle of the pipe fitting

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