Assembly method for inhibiting repeated positioning errors of linear shaft of precision machine tool

Abstract

The invention discloses an assembly method for inhibiting repeated positioning errors of a linear shaft of a precision machine tool, which comprises the steps of: (1) placing a part to be assembled ina constant-temperature environment of 20+ / -0.5 DEG C, standing for one day and then assembling; (2) assembling a main guide rail, measuring assembling errors ev1 and eh1 of the main guide rail in thehorizontal direction and the vertical direction, and scraping the mounting base surface of the main guide rail until the assembling errors ev1 and eh1 meet the design requirements; (3) assembling anauxiliary guide rail, measuring assembling errors ev2 and eh2 of the auxiliary guide rail in the horizontal direction and the vertical direction, and scraping the mounting base surface of the auxiliary guide rail until the assembling errors ev2 and eh2 meet the requirements; (4) assembling a ball screw, measuring an assembling error of the ball screw, and scraping the mounting base surface of theball screw until the design requirements are met; (5) assembling a grating ruler, measuring an assembling error f the grating ruler, and scraping the mounting base surface of the grating ruler until the requirements are met; (6) installing a workbench on a guide rail sliding block; (7) adjusting the pre-stretching amount of the ball screw; and (8) finally, completing the assembly.

Description

technical field [0001] The invention belongs to the technical field of assembly of precision machine tools, and in particular relates to an assembly method for suppressing repeated positioning errors of linear axes of precision machine tools. Background technique [0002] With the development of the modern machine tool industry towards automation, high speed, and precision, the products have higher and higher requirements for the accuracy of machine tools, and the repeated positioning error of machine tools has been paid more and more attention. Improving the comprehensive accuracy of machine tools is the key to improving critical to the overall performance of the machine tool. Repeated positioning error reflects the stability and consistency of machine tool positioning, and is one of the important indicators for evaluating machine tool performance. The current international standard [1] uses the expanded uncertainty of the standard deviation of motion deviation to express r...

AI Technical Summary

Problems solved by technology

[0004] Repeated positioning errors are non-compensable errors and cannot be suppressed by error compensation

At present, in engineering, there is no effective method to suppress repeated positioning errors. In most cases, according to the experience of assembly workers, repeated disassembly and reassembly are performed until the repeated positioning error meets the user's requirements. This method not only wastes time and cost. It can also damage parts, so there is a need for an effective assembly method that suppresses repetitive positioning errors

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