Development And Test Research Of The Comprehensive Performance Test Bench Of Ball Screw Guide Rail Pair Under Simulated Actual Working Condition

Ball screw pair and linear rolling guide as a core features affect the machining quality of nc machine tools,its performance directly affects the level of nc machine tools.Actual conditions in order to improve the ball screw pair and the rigidity of the linear rolling guide vice,often with increase of ball screw and linear guide pair of pre-tightening force method for improvement of the stiffness.In the process of actual use,due to the friction and wear of roller and race to cause a decline in pre-tightening force,lower precision.In order to improve the accuracy of ball screw pair,guide stability and reliability of each production enterprise research and development of many loading test bench,a large amount of experimental research work,the existing test-bed design scheme is based on the basic of ball screw pair or guide exert a certain load,and then run the test experiment was carried out,the ball screw pair and the guide of the test is carried out separately.The ball screw pair,and the actual machine guide at the same time change under different load conditions.Subject in this paper can simulate the ball screw vice guide actual loading conditions on machine tool,at the same time to screw pair and guide for the experiment of load test device,perfect testing system and carry out related experimental research.First this paper introduces the simulation of the actual working condition of ball screw vice guide design requirements and main performance index of the comprehensive performance test rig,the test of the main mechanical structure design scheme and each function module are introduced;Test rig measurement and control system hardware design scheme is analyzed,meet the requirements of various testing accuracy stable test;Gives the corresponding test rig measurement and control system software of the overall design scheme of test software design and development to provide conditions for the next step.And using the milling 45 # steel as the actual working condition,according to the related literature and the milling path design of the lead screw and guide rail stress size and feed rate,and determine the loading force and the change law of test-bed,choose according to the loading condition of the hydraulic loading method,and the general structure of the hydraulic servo loading system and introduces the way to work.Second,and then according to the ball screw pair and the test of rolling linear guide accuracy stable,this paper introduces the principle of precision ball screw pair of spiral detection,and complete the online measurement system software design and hardware selection,design of the ball screw pair and guide loading force testing system,and complete the online friction,temperature,vibration measurement system is designed,including the measurement principle,sensor selection,installation,use method and the software design process,the realization of the function of test methods,etc.Finally,the test rig to run the load,and the movement of the ball screw pair of parameters such as accuracy,vibration,friction torque test online and offline testing,friction,temperature rise,vibration of rolling linear guide on-line detection and offline testing,analysis and comparison on the test result,verify the accuracy and reliability of the system test,and analyze the test results,for further research on accuracy stable theory provides a technical method and the test method.