Spindle axial static rigidity test method and control system

Abstract

The invention discloses a spindle axial static rigidity test method and control system. The spindle axial static rigidity test control system is mainly composed of a data acquisition and processing system, a movement control system, a loading and unloading performance unit and a human-computer interaction interface. The data acquisition system comprises a pressure sensor, an eddy current displacement sensor, an NI data acquisition card and a computer. The movement control system comprises an NI movement control card, a server driver and a servo motor. The loading and unloading performance unit comprises a locking rod sleeve ring and a locking rod. The locking rod is connected with the locking rod sleeve ring through a thread pair. The computer is provided with data acquisition and processing programs and movement control programs complied based on LabVIEW and the human-computer interaction interface so as to realize data acquisition, operation, analysis, processing, display and storage and control of the loading and unloading performance unit. The spindle axial static rigidity test control system is suitable for static rigidity testing of various types of vertical and horizontal numerical control machine tool spindle units so that universality is great and efficiency is high.

Description

technical field [0001] The invention relates to the field of performance testing of machine tool spindles, in particular to a testing method and control system for axial static stiffness of a spindle. Background technique [0002] The main shaft is the core functional part of the machine tool, and its performance directly affects the performance of the machine tool. The axial static stiffness of the spindle refers to the ability of the spindle unit to resist deformation under the action of axial load. Usually, the axial static stiffness of the spindle is represented by the load applied in the direction of axial displacement when the front end of the spindle rotor produces a unit axial displacement. stiffness. The axial static stiffness of the spindle is an important index to evaluate the quality of the CNC machine tool and the design of the spindle unit. It will not only affect the geometric accuracy and surface quality of the machined parts, but also the basis for predicti...

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Problems solved by technology

[0003] At present, there are many test methods about the axial static stiffness of the main shaft at home and abroad, but the existing test methods only aim at the axial deformation of the main shaft under a certain load to approximate the axial stiffness of the main shaft. The linearized test method will cause certain errors in precision machining, especially in high-speed end milling of CNC machine tools

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