High-speed electric main shaft dynamic rigidity test device

Abstract

The invention discloses a high-speed electric main shaft dynamic rigidity test device which comprises a base, a loading system and an automatic control unit, wherein the loading system comprises an axial loading system, a radial loading system and a test rod fixedly arranged on a high-speed electric main shaft; the excircle of the test rod is provided with a radial rolling bearing, and the loading end part of the test rod is provided with a plane rolling bearing; and the radial loading system and the axial loading system respectively load the test rod by the radial rolling bearing and the plane rolling bearing. The invention combines the high-speed rotation and static loading of the main shaft by the rolling bearing structure and acquires a loading value and a deforming value by a pressure sensor and a displacement sensor, and the control unit controls loading pressure according to the change of the loading value and the deforming value, thereby preventing the influence on test precision caused by friction heat generation and mechanical abrasion generated by mechanical contact when the high-speed electric main shaft is directly loaded in a state of high-speed running, realizing continuous and stable dynamic loading and real-time measurement of the high-speed electric main shaft and having high measurement precision.

Description

technical field [0001] The invention relates to a detection mechanism, in particular to a dynamic stiffness testing device for a high-speed electric spindle. Background technique [0002] High-speed electric spindle is the product of the rapid development of contemporary high-speed machining technology and theory. It not only satisfies high-speed machining, but also promotes the further development of high-speed machining technology theory. It is an emerging science and technology. Structurally, the driving motor is built in as a part of the rotating mass of the main shaft, and power transmission devices such as belts and gears are omitted, thereby effectively reducing the vibration and noise of the main shaft and making the speed of the main shaft the same as that of the driving motor. The rated speed is synchronized, and its control becomes precise and easy. However, when the spindle obtains a very high rotation speed, it also creates a complex mechanical, electrical, mag...

AI Technical Summary

Problems solved by technology

If a traditional mechanical loading device is used to detect the dynamic performance of the electric spindle, although the device is simple and the cost is low, it is difficult to control and test, and the large amount of frictional heat and mechanical wear caused by the high-speed operation of the spindle cannot be used for non-destructive loading, and the loading cannot be realized Constant, which reduces the test accuracy and increases the difficulty of control

With the development of science and technology, the rotation speed of the spindle is getting higher and higher, making many traditional spindle performance testing techniques unable to meet the performance testing requirements of high-speed electric spindles

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