Valve self-centering tool clamp and operation method

Abstract

The invention discloses a valve self-centering tool fixture and an operation method. A valve is provided with a through hole, the tool fixture comprises a mounting seat, at least one self-centering mechanism, a first driving mechanism and a second driving mechanism, the mounting seat comprises a main body part and a transmission mechanism with a transmission shaft, and the self-centering mechanism is connected with the transmission shaft; the self-centering mechanism comprises two torsion limiters, two end surface thread discs and a plurality of jacking mechanisms, and under driving of the first driving mechanism, the mounting seat enters the to-be-machined through hole of the valve to do linear motion until the mounting seat reaches a preset position; under driving of the second driving mechanism, the transmission shaft rotates to drive the torsion limiters to rotate, the torsion limiters rotate to drive the two end surface threaded discs to rotate in the same direction, then the multiple jacking mechanisms are driven to move in the direction close to the inner wall of the through hole of the valve till the jacking mechanisms abut against the inner wall, and the axis of the transmission shaft coincides with the reference of the through hole of the valve. According to the valve self-centering tool clamp, the large clamping stroke, the reliable clamping torque and the self-locking capacity are achieved.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a valve self-centering fixture and an operating method. Background technique [0002] Now, when processing casting and forging symmetrical parts, it is basically still produced and processed by manual calibration and clamping; generally, such parts are mostly small-quantity and multi-batch parts, or large-quantity and multi-batch parts; therefore, for Such parts can be quickly and efficiently clamped, which is of great significance for improving production quality, increasing production efficiency, reducing production costs, and reducing labor intensity of workers. [0003] Especially for the clamping and correction of symmetrical back-to-back blank parts, single-action adjustable four-jaw chucks are often used for clamping and calibration of workpieces, because this kind of chuck can be adjusted with a large degree of freedom and simple and reliable structure; But the ca...

AI Technical Summary

Problems solved by technology

[0003] Especially for the clamping and correction of symmetrical back-to-body blank parts, single-action adjustable four-jaw chucks are often used for clamping and correction of workpieces, because this kind of chuck can be adjusted with a large degree of freedom and has a simple and reliable structure; But the calibration is troublesome; and the four claws are single-moving, and there is a screw in each claw. Turning a screw can only move one claw, and it cannot be self-centering.

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