Strong-generality comprehensive experiment table for testing dynamic and static properties of spindle system

Abstract

The invention discloses a strong-generality comprehensive experiment table for testing dynamic and static properties of a spindle system. The experiment table mainly comprises a driving electric spindle module, a mechanical spindle module and a hydraulic loading module, wherein the mechanical spindle module comprises a spindle, a bearing, a bearing pedestal, a pre-tightening force self-adaptive adjustment device, a temperature sensor, a displacement sensor, a pressure sensor and an air-oil lubrication device. The pre-tightening force self-adaptive adjustment is completed by six evenly distributed piezoelectric actuators, so as to realize the accurate control of the pre-tightening force of an angular contact ball bearing in the spindle system. According to the experiment table, different bearing configuration manners and different lubrication manners can be used, so that the properties of the experiment table are greatly expanded. Through controlling the rotation speed of an electric spindle, property test data such as temperature rise, rigidity and the like of the spindle under different configuration and pre-tightening conditions can be obtained by using the temperature sensor, the displacement sensor and the pressure sensor.

Description

technical field [0001] The invention belongs to the performance experiment field of a high-speed spindle of a machine tool, and relates to a comprehensive test bench for dynamic and static performance testing of a spindle system with strong versatility. Background technique [0002] The dynamic characteristics of the spindle-bearing system have a great impact on the overall performance of the machine tool, but there is still a lack of accurate and effective analysis methods at present. It mainly relies on empirical formulas to estimate or simplify calculations to constant elastic elements. The error is relatively large, so a lot of research is required. experiments to verify. [0003] The existing bearing-spindle system test bench has single function and can only test certain experimental functions (bearing stiffness, life, etc.). For example, Tang Yunbing designed an experimental device for rolling bearings to test the equivalent stiffness of ceramic bearings (Tang Yunbing ...

AI Technical Summary

Problems solved by technology

The latest bearing preload controllable technology eliminates the obvious shortcomings of the traditional constant preload technology: the preload force is too small at low speed, which reduces the rigidity of the bearing, and the spindle's ability to resist forced vibration and self-excited vibration is weak, resulting in Machining accuracy decreases; the preload force is too large at high speed, which intensifies the temperature rise of the bearing and restricts the high speed of the spindle

Images