A ball screw pair preload measurement and control system and method with self-sensing function

A ball screw pair, measurement and control system technology, applied to piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc. function and other problems, to achieve the effect of improving transmission accuracy, precise preload output control, and eliminating errors

Active Publication Date: 2017-12-12
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to solve the above problems, the present invention overcomes the problem that the existing controllable device for the pretightening force of the ball screw pair cannot realize the self-sensing function of the pretightening force and has a complicated structure, and proposes a ball screw pair pretightening device with the self-sensing function Force measurement and control system and method

Method used

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  • A ball screw pair preload measurement and control system and method with self-sensing function
  • A ball screw pair preload measurement and control system and method with self-sensing function
  • A ball screw pair preload measurement and control system and method with self-sensing function

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Embodiment

[0036] A ball screw pair preload measurement and control system with self-sensing function, including a preload device and a measurement and control device, wherein:

[0037] like figure 1 The schematic diagram of the structure of the pretensioning device shown, the pretensioning device is a symmetrical structure with double-ended output, including a giant magnetostrictive rod 11, and the giant magnetostrictive rod 11 is installed in the center of the bobbin 9, and the bobbin 9 The outer side is wound with a pickup coil 12 and an excitation coil 8, the outer side of the excitation coil 8 is provided with a permanent magnet 7, and the two ends of the giant magnetostrictive rod 11 are respectively connected to the yoke 6 through two magnetic blocks 13. The magnetostrictive rod 11 and the magnetically conductive blocks 13 at both ends are covered with a shaft sleeve 10, and each magnetically conductive block 13 is equipped with an output ejector rod 1, and the output ejector rod ...

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Abstract

The invention discloses a ball screw pair pre-tightening force measurement and control system and method with a self-sensing function. The system comprises a pre-tightening device and a measurement and control device, a giant magnetostrictive material is used as the core, the functions of an actuator and a sensor are realized by using the normal inverse effect of the material, a permanent magnet provides a bias magnetic field for a giant magnetostrictive bar, one coil is used as an exciting coil for providing a driving magnetic field for the giant magnetostrictive actuator of the measurement and control device, the magnitude of pre-tightening force output by the actuator is controlled by changing the current of the exciting coil, and the other coil is used as a pick-up coil for realizing the self-sensing function of ball screw pair pre-tightening force by acquiring a magnetic field change caused by a pre-tightening force change. The system and the method can realize self-sensing of the ball screw pair pre-tightening force and automatic and accurate control of the pre-tightening force, and improve the transmission precision of the ball screw pair, so that the running precision and the machining quality of a numerically-controlled machine tool are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of automatic measurement and control of the pretightening force of a ball screw pair, and in particular relates to a system and method for measuring and controlling the pretightening force of a ball screw pair with a self-sensing function. Background technique [0002] The level of the equipment manufacturing industry mainly depends on the machine tool. High-performance CNC machine tools need a matching high-performance feed system. The ball screw pair is the key joint of the feed system of the CNC machine tool. The clearance of the ball screw pair directly affects the actual running accuracy and processing quality of the CNC machine tool. However, due to the manufacturing and assembly errors, the ball screw pair always has a gap. At the same time Under the action of axial load on the ball screw, the contact part between the ball and the threaded raceway will produce elastic deformation, and the size of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/02H02N2/04H02N2/06
CPCH02N2/02H02N2/043H02N2/06
Inventor 林明星鞠晓君范文涛
Owner SHANDONG UNIV
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