Horizontal measuring device for axial static rigidity of ball screw pair and method thereof

Abstract

The invention discloses a horizontal measuring device and a horizontal measuring device for the axial static rigidity of a ball screw pair. The horizontal measuring device comprises a loading component, an anti-rotation component, a measuring component, a locking component, a support component and a data processing module, wherein the loading component comprises a servo motor, a decelerator, a belt wheel transmission part, a pair of loading screws, a pair of loading nuts and a moving beam; the anti-rotation component comprises a screw tool, an adaptor plate and a sleeve; the measuring component comprises a displacement sensor and a pressure sensor; the locking component comprises a locking screw, a locking hand wheel and double nuts; the support component comprises a lathe bed, a head bracket, a tail bracket and a displacement sensor clamp; and the data processing module is a computer needed by data processing. By utilizing the horizontal measuring device, the automatic measurement on the axial static rigidity of the ball screw pair is realized, and the horizontal measuring device has the advantages of large loading load, high measurement precision, wide application range, multiple measurement positions and consideration on both tension and compression in axial loading.

Description

technical field [0001] The invention belongs to the technical field of measurement, in particular to a horizontal measuring device and method for axial static stiffness of a ball screw pair. Background technique [0002] A ball screw pair is a mechanical component consisting of a ball screw, balls and ball nuts, whose main function is to convert rotational motion into linear motion, or torque into axial repetitive force. It can achieve very high transmission and positioning accuracy, and is widely used in the feed transmission system of various precision machine tools. It is a widely used and demanding accessory and basic part in the machinery industry. [0003] The axial static stiffness of the ball screw pair reflects the ability of the ball screw pair to resist axial deformation, which is defined as the axial force that produces 1 Axial force (N) required for deformation. The ball screw pair is a key component of the feed system of the CNC machine tool, and its various...

AI Technical Summary

Problems solved by technology

[0004] According to the literature search of the existing technology, Song Xianchun and others from Shandong Jianzhu University began to design and use the hydraulic system to carry out the axial loading of the ball screw pair in 2008. By collecting and processing the signals of the pressure sensor and the micro-displacement sensor, the shaft Static stiffness test; the device needs an additional T-shaped guide rail to limit the rotation of the screw, and uses a hydraulic system to apply pressure to the screw. The maximum axial load is 100kN, which cannot achieve both tension and compression. The loading method is single, and the load Smaller, complex loading system, high cost, and immature technical means

Chinese Invention Patent Publication No. CN102116717 A, titled: Ball Screw Axial Static Stiffness Test Fixture Based on Material Testing Machine, this patent introduces a special fixture designed based on material testing machine, the specific test method is based on material testing machine As the main body, the axial tension and compression test of the ball screw pair can be carried out through the special fixture, with a maximum loading capacity of 500kN, and the simultaneous acquisition of force and displacement is realized by using the upper computer software and hardware system that comes with the material testing machine, and the axial Drawing of the static stiffness curve; due to the limitation of the clamping device of the material testing machine and the size of the special fixture, the total length of the tested screw must be less than 600mm, and the tested nut must be specially made with a flange with an outer diameter greater than 82mm and punched on the flange. Only the hole can meet the clamping requirements, so the length of the ball screw pair to be tested is limited, and there are few measurable diameter series, especially the larger diameter series cannot be measured, and the versatility is low. When loading, it can only be stretched but not pressed. Single, technical means are not mature and other shortcomings

Images