Actual-working-condition-based precision retention test device and method of ball screw pair

Abstract

The invention provides an actual-working-condition-based precision retention test device and method of a ball screw pair. The device comprises a lathe bed, a sliding saddle, a work table, a force applying mechanism, a hydraulic station, a lubrication mechanism, a console and a ball screw pair test piece. The lathe bed, the sliding saddle, the work table, and the console employ lathe bed parts matching the ball screw pair test piece that is connected between the sliding saddle and the work table. The force applying mechanism is arranged on the ground and is connected with the work table. A circular grating ruler is arranged at the tail of the ball screw pair test piece. A linear grating ruler is arranged on the work table. A proportional valve or a servo valve is arranged in the hydraulic station. In addition, the method includes the following steps that: the running length or running time of the ball screw pair test piece is set by the console; the ball screw pair test piece is operated; after operation ending, the operation precision of the ball screw pair test piece is measured by using the circular grating ruler and the linear grating ruler; the operation and measurement processes are repeated until the operation precision is lost completely; and on the basis of the obtained operation precision data, the precision retention rule of the ball screw pair test piece is studied.

Description

technical field [0001] The invention belongs to the technical field of precision retention testing and research of rolling functional parts, and in particular relates to a test device and method for precision retention of a ball screw pair based on real working conditions. Background technique [0002] As a precision transmission component, the ball screw pair has the advantages of high transmission efficiency, high transmission precision, stable transmission, low wear, long life, no axial clearance, high rigidity, etc. It has been widely used in automation, aviation, automobile and other fields , and the demand is also increasing rapidly, while the performance requirements of the ball screw pair are also increasing. [0003] Taking the field of high-end CNC machine tools as an example, the accuracy retention and service life of the ball screw pair are crucial to the overall performance, machining accuracy, and equipment life of the CNC machine tool. [0004] Since foreign ...

AI Technical Summary

Problems solved by technology

[0004] Since foreign countries have always been in a state of technical blockade in the accuracy maintenance test of ball screw pairs, there are still great deficiencies in domestic research on related aspects, and the test devices for the performance research of ball screw pairs are mainly focused on performance. In terms of testing, and most of the test devices still do not have the loading capacity, cannot simulate the actual working conditions during processing, let alone carry out precision maintenance tests, and lack relevant test methods

[0005] Due to the lack of relevant equipment in China that can perform precision maintenance and life tests on ball screw pairs, we are looking for solutions for related domestic industries

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