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.
Highlights
As known, the motorized spindle is the combination of spindle and motor and has many advantages, such as small vibration, low noise, high accuracy, and high speed
For carrying out this test, it is of great significance to carry out researches about the measurement index system of motorized spindle and its test methods
Jilin University, based on this analysis, has developed a test system[13,14,25] to evaluate the reliability of motorized spindle, and the system is shown in Figure 15.25 According to the figure, the actual radial and axial forces of motorized spindle are simulated by two sets of electro-hydraulic servo loading systems, and the actual torque is simulated by a power dynamometer
Summary
The motorized spindle is the combination of spindle and motor and has many advantages, such as small vibration, low noise, high accuracy, and high speed. Zhou et al.[11] took five items to characterize the comprehensive performance of motorized spindle, such as temperature rise, thermal deformation, speed–load characteristics, geometric accuracy of axes of rotation, and dynamic and static characteristics.
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