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Test device for online testing ball screw pair friction torque and axial load

A technology of ball screw pair and friction torque, which is applied in the direction of measuring devices, testing of mechanical components, testing of machine/structural components, etc., to achieve the effects of improving test accuracy, eliminating influence, and avoiding assembly errors

Active Publication Date: 2018-11-23
BEIJING UNIV OF TECH
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AI Technical Summary

Problems solved by technology

At present, for the generation mechanism of the friction torque of the ball screw pair and the reasons for the large fluctuations, a set of recognized and complete theories has not been established at home and abroad. The main reason is that there is no test device that can measure the friction torque online and in real time.

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  • Test device for online testing ball screw pair friction torque and axial load
  • Test device for online testing ball screw pair friction torque and axial load
  • Test device for online testing ball screw pair friction torque and axial load

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0015] The invention relates to a test device for online testing of the friction torque and axial load of a ball screw pair, which is used to study the relationship between the axial load, pretightening force and friction torque under the working state of the ball screw pair, and further The friction and wear characteristics and accuracy retention of the ball screw pair under different loads were studied.

[0016] In order to achieve the above purpose, the technical solution adopted by the present invention is a test device for online testing of friction torque and axial load of the ball screw pair. The test device includes: main workbench (1), auxiliary ball screw pair (2 ), two-dimensional force sensor (3), main nut seat (4), linear rolling guide pair (5), main ball screw pair (6), coupling (7), auxiliary servo motor (8), main servo Motor (...

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Abstract

The invention discloses a test device for online testing ball screw pair friction torque and axial load, and aims at measuring the relationship between the friction torque and the axial load of the ball screw pair and studying the friction and wear characteristics, precision maintenance and fatigue life of the ball screw pair. According to the test device, axial loading of the ball screw pair is performed by using center of gravity driving to simulate the axial load of the ball screw pair in actual transmission so that the influence of additional torque on ball screw pair transmission can be eliminated and the relationship between the friction torque and the axial load of the ball screw pair can be more accurately measured. According to the test device, a two-dimensional force sensor is installed between the specially designed ball screw pair nut base and the workbench so that online real-time measurement of the friction torque and the axial load of the ball screw pair can be realized.The test device can be used for studying the relationship among the axial load, the pre-tightening force and the friction torque under the working condition of the ball screw pair and further studying the friction and wear characteristics and precision maintenance of the ball screw pair under different loads.

Description

technical field [0001] The invention discloses a test device for on-line testing the friction torque and axial load of a ball screw pair, belonging to the technical field of ball screw pair detection. Background technique [0002] The ball screw pair can realize mutual conversion between rotary motion and linear motion. It is an important motion functional component widely used in CNC machine tools, robots and other automation products. Its precision performance determines the accuracy of the feed system of automation products. During the movement of the ball screw pair, the friction and wear between the ball and the raceway will cause the change of the friction torque, so the transmission accuracy of the ball screw pair is closely related to the friction torque. At present, there is no well-recognized complete theory at home and abroad for the generation mechanism of the friction torque of the ball screw pair and the reasons for the large fluctuations. The main reason is th...

Claims

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Application Information

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IPC IPC(8): G01L3/00G01L5/24G01M13/02
CPCG01L3/00G01L5/24G01M13/027
Inventor 王民董朝阳孔德顺
Owner BEIJING UNIV OF TECH
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