A detector for repetitive positioning accuracy of moving parts

Abstract

The invention discloses a moving part repeated positioning precision detector, and belongs to the field of machine tool precision measurement. The moving part repeated positioning precision detector comprises an upper carrier module and a lower carrier module, wherein an upper hemispherical groove is formed in the center of the upper carrier module, a lower hemispherical groove is formed in the center of the lower carrier module, the upper hemispherical groove and the lower hemispherical groove are buckled to form a spherical containing space, a sensing ball body is arranged in the spherical containing space, a plurality of piezoelectric ceramic pieces are uniformly pasted on the surface of the sensing ball body, three detection arms which are arranged in the radial direction are arrangedon the sensing ball body, the three detection arms extend out of the upper carrier module and the lower carrier module and are distributed in the X, Y and Z coordinate axes in space, and the upper carrier module and the lower carrier module are correspondingly provided with semi-circle through grooves used for allowing the detection arms to penetrate therethrough. According to the detector, the piezoelectric ceramic pieces in the multiple angles can reflect the fluctuation quantity of a tested tool in all directions in real time, the detection is not limited to fluctuation in three directionsany longer, and then the measured data are more targeted.

Description

technical field [0001] The invention belongs to the field of machine tool accuracy measurement, and in particular relates to a moving part repeat positioning accuracy detector, which can detect the repeat positioning accuracy of the moving parts on various types of machine tools. Background technique [0002] In the machine tool processing system, the accuracy of the tool tip motion trajectory is the key factor affecting the machining accuracy of the workpiece surface. Whether it is a single-axis or multi-axis system, the verification of the repetitive positioning accuracy of the kinematic mechanism driving the tool is to ensure the repetitive positioning accuracy of the machine tool. key to reliability. The number of drive shafts of the existing machine tool moving parts and the motion state mainly include: single-axis motion (linear motion, rotation and compound motion) and multi-axis space linkage compound motion. Regardless of the motion state, due to the limitations of ...

AI Technical Summary

Problems solved by technology

The number of drive shafts of the existing machine tool moving parts and the motion state mainly include: single-axis motion (linear motion, rotation and compound motion) and multi-axis space linkage compound motion. Regardless of the motion state, due to the limitations of space and position, calibration It is difficult to test the repeated positioning accuracy of the kinematic mechanism of the tool drive shaft during the motion state

[0003] Chinese Patent Publication No. CN108177024A discloses a tool post positioning accuracy and repeat positioning accuracy detection device and its use method, which is mainly based on the angle of the tool post user and the tool post reliability test, using laser interference technology to test different types of CNC horizontal The general-purpose, fast and convenient positioning accuracy and repeat positioning accuracy detection device of the servo tool holder does not disassemble the cutter head. The overall structure is complex, the accuracy requirements are relatively high, and the cost is high, which cannot fully meet the needs.

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