Bearing unit for testing and controlling angular displacement of revolving platform

Abstract

The invention provides a bearing unit for testing and controlling the angular displacement of a revolving platform, which mainly consists of a work bedplate, a supporting seat, a bearing body arranged therebetween, a control system, a driving device and an angular displacement testing device, wherein the bearing body is formed by a moving coil, a static coil and a rolling body; and the angular displacement testing device is formed by a magnetic grid ruler and a sensor. The bearing unit has flexible and convenient installation, combines with the real-time test of a high-precision bearing, feeds an angular displacement signal back to a controlling system, and achieves the aim of closed-loop control. The work bedplate is driven by the driving device, a signal output end of the controlling system inputs the driving device, the angular displacement testing device immediately tests the angular displacement and inputs the signal to the controlling system when the work bedplate is rotated, and the controlling system controls the driving device to modify the angular displacement of the work bedplate.

Description

technical field [0001] The invention relates to a precision rotary table with measurement and control, in particular to a bearing unit for angular displacement measurement and control of the rotary table. Background technique [0002] At present, precision rotary tables are mainly used in the field of high-precision rotation and control, such as; CNC machine tools and CNC machining center rotary tables, tank turrets, radar rotary tables, surgical rotary tables, electronic component welding rotary tables, etc. These types of equipment require High transmission precision, and cooperate with high-precision bearings to complete each action. Therefore, in actual operation, due to fatigue and wear of the transmission parts, the precision will gradually decrease, and the operation error will gradually increase, resulting in Serious consequences. For this reason, people think of using elements such as sensors to combine with the stressed rotating parts of the equipment to detect par...

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Problems solved by technology

[0002] At present, precision rotary tables are mainly used in the field of high-precision rotation and control, such as; CNC machine tools and CNC machining center rotary tables, tank turrets, radar rotary tables, surgical rotary tables, electronic component welding rotary tables, etc. These types of equipment require High transmission precision, and cooperate with high-precision bearings to complete each action. Therefore, in actual operation, due to fatigue and wear of the transmission parts, the precision will gradually decrease, and the operation error will gradually increase, resulting in Serious consequences. For this reason, people think of using elements such as sensors to combine with the stressed rotating parts of the equipment to detect parameters such as vibration, speed, temperature, etc. on it to analyze the working state of the internal transmission parts ( For example: degree of wear), such as Chinese patent: a sensor bearing, the application number is 200910100833.4, which introduces a sensor bearing structure that uses a Hall sensor and a multi-pole magnetic ring to detect the bearing speed and rotation direction. It is only a single problem. It can only detect and analyze whether the components are in normal working condition, and cannot fundamentally solve the problem of low rotation angular displacement accuracy. How to design a closed-loop control angular displacement measurement system can ensure the working accuracy of transmission parts. At the same time, it is a difficult problem to be solved for real-time measurement, monitoring and feedback.

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