A guide rail straightness measuring device and method for a linear feed system

Abstract

The invention provides a linear feed system's guide rail linearity measuring apparatus and method wherein the reference coordinate system of the linear feed system's guide rail uses the vertical direction as Z axis, the moving direction of the sliding block as Y axis, and the direction horizontally perpendicular and away from the guide rail as X axis. The apparatus comprises a first measuring clamp and a second measuring clamp fixedly arranged on the sliding block respectively; a laser collimator fixedly arranged on the first measuring clamp; a No. 2 displacement sensor and a No. 3 displacement sensor symmetrically arranged in the X direction of the second measuring clamp; and a No. 1 displacement sensor on the Z direction of the second measuring clamp. The optical path of the laser collimator is parallel to the Y direction of the first measuring clamp. The center line of the No. 1 displacement sensor passes through the center point of the laser collimator. The three displacement sensors are located on the plane perpendicular to the Y direction. The No. 2 displacement sensor and the No. 3 displacement sensor are used to measure the displacement gap between the guide rail and the Y direction of the sliding block respectively. The No. 1 displacement sensor and the laser collimator are used to measure the displacement gap between the sliding block and the Z direction of the guide rail.

Description

technical field [0001] The invention relates to the measurement of machining accuracy of a machine tool, in particular to a device and method for measuring the straightness of a guide rail of a linear feed system. Background technique [0002] The machining accuracy of machine tools is the key standard for evaluating the overall performance of machine tools. The machining accuracy of advanced foreign precision machine tools has reached 1 μm to 0.1 μm, and the machining accuracy of ultra-precision machine tools has been higher than 0.1 μm, which indicates that the machining accuracy of the machine tool industry has reached Enter the nanoscale era. However, my country's precision machine tools at this precision level have a clear gap with the international leading level in terms of precision and consistency assurance. Studies have shown that the sources of machine tool machining errors mainly include quasi-static errors, such as geometric errors and thermal errors; errors dur...

AI Technical Summary

Problems solved by technology

The current measurement methods for the straightness of several guide rails cannot meet the measurement accuracy requirements of high-precision machine tool assembly technology. The assembly process optimization of precision machine tools is particularly important

At the same time, in actual production, the horizontal and vertical straightness errors of the guide rails in the linear feed system are the main accuracy indicators in the precision design and assembly links. These errors are all precision items that can be directly controlled during the design and assembly process. , and the target accuracy of the linear feed system, that is, the motion error of the worktable, cannot be directly regulated, which also brings obstacles to the accuracy guarantee in the linear feed system

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