Friction force measuring device of ball screws with variable loads and measuring method of friction force measuring device

A ball screw and measuring device technology, which is applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve the problems that the measurement is easily affected by external friction force, the ball and the raceway are small, etc.

Active Publication Date: 2013-06-26
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the friction between the inner ball and the raceway of the ball screw pair is very small, and its measurement is easily affected by external friction.

Method used

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  • Friction force measuring device of ball screws with variable loads and measuring method of friction force measuring device
  • Friction force measuring device of ball screws with variable loads and measuring method of friction force measuring device
  • Friction force measuring device of ball screws with variable loads and measuring method of friction force measuring device

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0024] Such as Figure 7 As shown, the variable load ball screw friction test device provided by the present invention includes an optical vibration isolation table 1, a servo motor 10, a shaft coupling 9, a double nut ball screw, a spring, a steel ball 6, a first gear Plate 71, second baffle plate 72, first L-shaped base 2, second L-shaped base 8, connecting device 12 with a slot, guide spline 3, dowel 13, force sensor 14, supporting plate 15. Wherein, the first L-shaped base 2 , the second L-sh...

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Abstract

The invention discloses a friction force measuring device of ball screws with variable loads. The friction force measuring device comprises a vibration insolating rack, an L-shaped base, a servo motor, a guide spline, a spring, a double-nut ball screw, a shaft coupler, a friction force measuring mechanism and the like. The friction force measuring mechanism comprises two baffles, ten bolts, ten steel balls, a dynamic sensor, a sensor support and a dowel bar. The L-shaped base is fixed on the vibration insolating rack; the ball screw is set up on the L-shaped base with one end fixed and the other end free; the spring is mounted between two nuts; and the measuring device is placed on the guide spline. The invention further provides a corresponding measuring method of the friction force measuring device. Quantificational varying of axial loads of the ball screws can be realized by the aid of the friction force measuring device with internal loads which are remarkably different from that of other operation devices, so that affections of other friction force caused by external loads do not exist, and friction force between rolling bodies of the ball screws and a rolling path can be measured accurately.

Description

technical field [0001] The invention relates to the technical field of mechanical design and testing in mechanical engineering, in particular to a variable-load ball screw friction measuring device and testing method. Background technique [0002] The ball screw pair is a helical transmission element, which has the advantages of high positioning accuracy, small friction, and high transmission efficiency. It is a key component of the feed system of CNC machine tools. [0003] A traditional testing device mainly includes a driving part, a transmission part, a measuring part and a loading part. The loading part is mainly external loading, that is, the load is an external force relative to the ball screw system. This will inevitably bring about the consequences of introducing external friction. However, the friction force between the inner ball and the raceway of the ball screw pair is very small, and its measurement is easily affected by external friction force. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00
Inventor 姚振强许胜沈洪徐正松
Owner SHANGHAI JIAO TONG UNIV
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