Controllable adjusting and measuring device of ball screw pretightening force and pretensioning amount

A pre-tightening force adjustment, ball screw technology, used in feeding devices, measuring/indicating equipment, maintenance and safety accessories, etc. Convenience and reliability, guaranteeing the effect of running performance

Inactive Publication Date: 2014-07-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now the pre-stretching of the screw is to directly apply tension to the fixed supports at both ends to stretch the screw to the required length. However, after the screw runs for a period of time, the pre

Method used

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  • Controllable adjusting and measuring device of ball screw pretightening force and pretensioning amount
  • Controllable adjusting and measuring device of ball screw pretightening force and pretensioning amount
  • Controllable adjusting and measuring device of ball screw pretightening force and pretensioning amount

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Embodiment Construction

[0025] The following describes in detail a ball screw pretension and pretension adjustment and measurement device proposed by the present invention with reference to the drawings and specific embodiments.

[0026] Such as figure 1 with 2 As shown, the structure of the linear feed system is: a motor support base 2 is fixed at one end of the bottom plate 1, and the servo motor 3 is fixed on the motor support base 2; the ball screw 4 passes through the coupling 5 and the servo motor 3 The shaft is connected; the ball screw 4 is at one end close to the coupling 5, and is supported and rotated by the first ball screw fixed support end 6 fixed on the bottom plate 1, and the other end is supported by the second ball fixed on the moving platform 7 The fixed support end 8 of the screw is supported and rotated; the ball screw 4 is sleeved with two flanges with opposite rotation directions, a first screw nut 9 and a second screw nut 10; on the second screw nut 10 The screw nut seat 11 is co...

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Abstract

The invention belongs to the technical field of machinery manufacturing, and particularly relates to a controllable adjusting and measuring device of ball screw pretightening force and pretensioning amount. The pretightening force adjustment of screw nuts is achieved through three pretightening force devices which are of the same structure and are evenly distributed between the two screw nuts, each pretightening force device can conduct pretightening on the two screw nuts through tightening the nuts to press a spring, and the magnitude of the pretightening force can be measured in real time through a pull pressure sensor, so that the controllable adjustment of the pretightening force of the screw nuts can be achieved; the ball screw pretensioning is achieved by the method that tensile force is imposed to a separated mobile platform to drive a ball screw fixing supporting seat to move, and thus drawing force is generated to the ball screw, the pretensioning amount is measured through a dial indicator fixed to the end of the screw, and the magnitude of the drawing force is measured in real time through two pull pressure sensors fixed on the side face of the mobile platform.

Description

Technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and specifically relates to a controllable adjustment and measurement device for the pretension and pretension of a ball screw. Background technique [0002] The ball screw is an important component in the linear drive system of a CNC machine tool, and its accuracy, rigidity, reliability and other properties directly affect the machining accuracy and processing stability of the machine tool. In actual use, due to manufacturing and assembly errors, there is always a certain gap between the ball screw nut and the ball. In addition, during the movement, the screw will be deformed due to the axial load. , So that there will be idle errors during the reverse movement, which reduce the axial transmission accuracy and axial rigidity of the ball screw. In order to solve the above-mentioned problems, the currently commonly used method is to pre-tighten the screw nut to improve the rigidity of...

Claims

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Application Information

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IPC IPC(8): B23Q11/00B23Q17/00
CPCB23Q5/40B23Q17/007B23Q2705/14
Inventor 李铁民姜峣李福华杜云松吴军关立文
Owner TSINGHUA UNIV
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