Novel device for detecting inner rolling path profile of ball screw nut, and method of device

Abstract

The invention discloses a device for detecting the inner rolling path profile of a ball screw nut, and the device comprises a marble platform, a nut clamping device and an X-axis linear movement platform, wherein the nut clamping device and the X-axis linear movement platform are disposed on the marble platform. The nut clamping device is provided with a to-be-detected part, and the laser light emitted by a double-frequency laser generator passes through a light splitter and a light right-angle reflector to reach a laser interferometer. The first laser interferometer is used for measuring the lateral displacement of a workbench. A second interferometer and a third interferometer play the same role, and the light passing through the second and third interferometers will generate diffuse reflection on a rolling path of the to-be-detected part. The returned light will be received by a photoelectric detector, and the contours of left and right arcs of the inner rolling path of the to-be-detected part are obtained with the movement of a measuring rod fixed on the X-axis linear movement platform. The device is high in precision, is high in measurement speed, does not damage the detected part, is high in automation degree, and meets the demands of automatic detection.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a novel ball screw nut inner raceway profile detection device and method thereof. Background technique [0002] At present, the surface of the inner raceway of the ball screw nut is generally measured by the indirect method or contact sensor. Grind the sample, cut the obtained sample along the axis, and then project it on the large screen to observe the profile of the raceway section. If the requirements are met, use the grinding wheel as the standard processing tool for this type of raceway. This method requires cutting The nut causes damage to the test piece, and the human factor is very large, and the repeatability of the measurement result is poor; the contact measurement uses a profiler to measure, the probe penetrates into the nut and crawls along the raceway, and the profiler can obtain the raceway profile with amplified signal, This method has high requirements on th...

AI Technical Summary

Problems solved by technology

[0002] At present, the surface of the inner raceway of the ball screw nut is generally measured by the indirect method or contact sensor. Grind the sample, cut the obtained sample along the axis, and then project it on the large screen to observe the profile of the raceway section. If the requirements are met, use the grinding wheel as the standard processing tool for this type of raceway. This method requires cutting The nut causes damage to the test piece, and the human factor is very large, and the repeatability of the measurement result is poor; the contact measurement uses a profiler to measure, the probe penetrates into the nut and crawls along the raceway, and the profiler can obtain the raceway profile with amplified signal, This method has high requirements on the installation standard, and does not take into account the influence of the helix angle, resulting in large errors and low efficiency

To sum up, there is no special equipment to detect the inner raceway profile of the nut at this stage, and the existing detection methods cannot obtain specific relevant parameters of the left and right arcs of the raceway

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