Device and method for measuring phase error of ball nut

Abstract

The invention discloses a device for measuring a phase error of a ball nut. The device comprises: a supporting part for bearing other parts for the device, a workpiece clamping part which is used forclamping and fixing the ball nut to be tested and can realize nut rotation; a measuring component which is used for measuring the phase error of the ball nut to be measured; an axial moving part whichis used for carrying the measuring part to move axially, wherein the axial direction is perpendicular to the reference surface of the ball nut; and a transverse moving part which is used for carryingthe measuring part to transversely move, wherein the transverse direction is perpendicular to the axial direction. The device can accurately, efficiently and stably measure the phase error between the nut raceway and the reverser raceway. The device is high in universality, and can measure ball nuts of different types and different sizes such as an internal circulation nut, an external circulation nut and an end cover circulation nut. The invention further discloses a method for measuring the phase error of the ball nut.

Description

technical field [0001] The invention belongs to the field of ball screw performance detection, in particular to a device for measuring the phase error of a ball nut. Background technique [0002] The ball screw pair is a transmission component that places appropriate balls between the screw and the nut as an intermediate, and with the help of a ball reverser, the balls can move repeatedly in the circuit and convert rotational motion into linear motion. Its high precision, high efficiency, high rigidity and high load-bearing advantages make the ball screw pair widely used in industrial fields such as precision machine tools, oil drilling and scientific measurement. According to its circulation mode, it can be divided into internal circulation ball screw and external circulation. Recirculating ball screw. [0003] Regardless of whether it is an external circulation or an internal circulation, in order to ensure smooth ball circulation and return, ideally the thread raceway sh...

AI Technical Summary

Problems solved by technology

However, limited by processing errors and technological level, there will be a phase difference between the threaded raceway and the reverser hole, which will lead to poor ball circulation, collision and wear with the reverser, and seriously affect the performance of the ball screw pair.

[0004] There is a patent CN 104259933 A for nut phase measurement. From a structural point of view, the device is a suspended measuring device. Its vertical dimension is too long compared with other dimensions, its rigidity is weak, its stability is poor, and its measurement accuracy is difficult to guarantee.

Secondly, the measuring device needs to be installed on the machining center, so the application occasions are limited and inconvenient

At present, the domestic control of the nut phase error mainly relies on skilled operators. The adjustment effect varies from person to person based on experience, and the actual error value is even less known.

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