Development Of Reliability Test Bench And Experimental Study Of Ball Screw

Scroll feature can realize mutual conversion between rotary motion and linear motion. Its application field is very broad, such as the application on the aircraft landing gear, automotive steering gear, NC machine tool feed drive mechanism, etc. Ball screw vice has a kind of high efficiency, energy saving transmission and positioning components. Because of efficiency, quick, saving energy, high rigidity of transmission zero clearance, tracking and agility, no polluting the environment and the characteristics of strong adaptability to the environment, high speed precision ball screw pair has became an irreplaceable key features for all kinds of large-scale machine tools. Currently, in the reliability theory of the ball screw vice and the standard of testing evaluation research in-depth, lack of effective experimental equipment and testing means.The paper group to undertake major national science and technology projects "scroll feature industrialization development and application of key technology and equipment" ZX04002013 (2012), the national natural science fund project "abnormal condition ball screw transmission failure mechanism and experimental study on" (51375279). Around the ball screw vice reliability failure mechanism, the overall design and the development and design of the detection system of the test bench, etc, mainly in the following several aspects work:Firstly, analyze the common failure modes and failure principle of the ball screw vice, discuss the main factors affecting the service life of ball screw pair in this paper, based on the elastic contact theory, analyze and calculate the ball and raceway contact deformation in the ball screw pair drive system. Secondly, discusses the simulation of working condition of the ball screw pair of actual load reliability test device design scheme, compares the advantages and disadvantages of the existing common load. Based on the designed, develop the reliability test of hydraulic loading device, introduce the mechanical, electrical control and detection system. Analyze and design each test module function of reliability test. Develop and design the corresponding software, including temperature, friction torque, noise measurement processing software, etc.In order to further to develop reliability test research, test specification, test conditions, test process and test results of evaluation methods on the ball screw reliability are discussed in this paper. Finally, summarize part of the test results, analyze the existing problems and the direction of future efforts.