Development of comprehensive performance testing technology for motorized spindle

Abstract

The comprehensive performance test of motorized spindle will contribute to improve the machining quality of machine tool. But existing standards for testing the performance of motorized spindle are limited to test its partial static and dynamic performances. Meantime, most of the researches only focus on the vibration, thermal deformation, and rotary accuracy of motorized spindle. Consequently, how to accurately and comprehensively test the performance of motorized spindle is the key problem. For solving this problem, a comprehensive testing technology is presented in this article. In detail, some principles for establishing a test index system are proposed. And, by synthetically and systematically analyzing the process of structural design, manufacturing and assembly, use, and service, an index system for characterizing the comprehensive performance of motorized spindle is built. Then, some operational test methods are provided to evaluate the selected indexes. Finally, the proposed technology is taken to test a motorized spindle. In brief, the proposed technology will make the performance test of motorized spindle more comprehensive and operational and can provide support for improving the comprehensive performance of the motorized spindle.

Stiffness Model and Experimental Study of Hydrostatic Spindle System considering Rotor Swing

“…Gaber and Hashemi [12] developed a calibrated dynamics stiffness matrix (CDSM) method, which could be effectively applied to predict the vibration characteristics of spindle systems. e test methods of spindle system performance mainly include the time domain analysis method and frequency domain analysis method [13,14]. e method of time domain analysis is to identify stiffness and damping coefficients by using time domain vibration data of the spindle system.…”