Establishment and Experimental Research of Performance Test Table of High-Speed Ball Screw Feed System

2011 ◽  
Vol 66-68 ◽  
pp. 295-298
Author(s):  
Ya Qin Li ◽  
Yang Yang Han ◽  
Jia Yao ◽  
Chun Shan Liu ◽  
Wei Lu
Keyword(s):  
High Speed ◽  
Performance Test ◽  
Test System ◽  
Numerical Control ◽  
Ball Screw ◽  
Test Results ◽  
Rational Analysis ◽  
Feed System ◽  
Numerical Control Machining ◽  
Test Table

The high-speed processing performance test table has been built, the automatic return circuit test has also been designed to ensure convenience. The high-speed processing performance measurement test system has been established, the corresponding test results have been obtained. Finally, effective measures have been obtained through the rational analysis of the test results to improve the precision CNC(computer numerical control) machining.

scholarly journals Research on Performance Test System of Space Harmonic Reducer in High Vacuum and Low Temperature Environment

Machines ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Jing Wang ◽  
Zhihua Wan ◽  
Zhurong Dong ◽  
Zhengguo Li
Keyword(s):  
Low Temperature ◽  
High Speed ◽  
Performance Test ◽  
High Reliability ◽  
High Vacuum ◽  
Test System ◽  
Low Noise ◽  
Speed Ratio ◽  
Space Harmonic ◽  
Temperature Environment

The harmonic reducer, with its advantages of high precision, low noise, light weight, and high speed ratio, has been widely used in aerospace solar wing deployment mechanisms, antenna pointing mechanisms, robot joints, and other precision transmission fields. Accurately predicting the performance of the harmonic reducer under various application conditions is of great significance to the high reliability and long life of the harmonic reducer. In this paper, a set of automatic harmonic reducer performance test systems is designed. By using the CANOpen bus interface to control the servo motor as the drive motor, through accurately controlling the motor speed and rotation angle, collecting the angle, torque, and current in real time, the life cycle test of space harmonic reducer was carried out in high vacuum and low temperature environment on the ground. Then, the collected data were automatically analyzed and calculated. The test data of the transmission accuracy, backlash, and transmission efficiency of the space harmonic reducer were obtained. It is proven by experiments that the performance data of the harmonic reducer in space work can be more accurately obtained by using the test system mentioned in this paper, which is convenient for further research on related lubricating materials.

The Study of Thermal Raising and Transmission Torque of High Speed Ball-Screw Lubricated by Different Greases

2015 ◽  
Vol 642 ◽  
pp. 212-216
Author(s):  
Yi Haung ◽  
Chin Chung Wei
Keyword(s):  
Contact Area ◽  
Axial Load ◽  
High Speed ◽  
Performance Test ◽  
Vertical Motion ◽  
High Viscosity ◽  
Ball Screw ◽  
Frictional Heat ◽  
Motion Platform ◽  
Base Oil

Ball screw is a high-precision and high performance linear drive of mechanical elements. The frictional heat of internal components what is very significant impact for platform transmission in high speed and the high axial load and causes the thermal expansion of element. In this research , the influence of different greases on ball screw is investigated in thermal rising of nut and driving torque in high speed and high axial load. A vertical motion platform was used for driving performance test. Thermal rising of nut of ball screw and the variance of transmission torque whose lubricated by high viscosity base oil grease is significant larger than the lower one. High viscosity grease is not easy to carry out the friction heat generated at ball and raceway contact area due to the bad flowing properties. It also has more serious wear occurred at contact area and high friction force, whose causes the large variance of transmission torque.

scholarly journals Dynamic Modeling and Experiment Research on Twin Ball Screw Feed System Considering the Joint Stiffness

Symmetry ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 686 ◽  
Author(s):  
Meng Duan ◽  
Hong Lu ◽  
Xinbao Zhang ◽  
Yongquan Zhang ◽  
Zhangjie Li ◽  
...  
Keyword(s):  
Dynamic Modeling ◽  
Dynamic Characteristics ◽  
Friction Model ◽  
Numerical Control ◽  
Ball Screw ◽  
Cnc Machine Tools ◽  
Axial Stiffness ◽  
Cnc Machine ◽  
Feed System ◽  
Lumped Mass

It is of great significance to study the dynamic characteristics of twin ball screw (TBS) feed system to improve the precision of gantry-type dual-driven computer numerical control (CNC) machine tools. In this paper, an equivalent dynamic model of the TBS feed system is established utilizing lumped mass method considering the stiffness of joints. Equivalent axial stiffness of screw-nut joints and bearing joints are both calculated by Hertz contact theory. Furthermore, a friction model is proposed because the friction force of the screw nut affects the stiffness of the joints. Then, the friction parameters are obtained by using the nonlinear system identification method. Meanwhile, a finite element model (FEM) is developed to assess the dynamic characteristics of TBS feed system under the stiffness of joints. Finally, validation experiments are conducted, and the results show that the positions of the nut and the velocities of worktable greatly affect the dynamic characteristics of the TBS feed system. Compared with the theoretical calculation, FEM and experiments indicate that the dynamic modeling proposed in this article can reach a higher accuracy.

scholarly journals Integrated Durability of Automobile Alternator Test System Design Based on LabVIEW

2014 ◽  
Vol 8 (1) ◽  
pp. 839-845 ◽  
Author(s):  
Wu Weibin ◽  
Feng Yue ◽  
Du Junyi ◽  
Xu Pengbo ◽  
Feng Yunlin ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Automotive Industry ◽  
Virtual Instrument ◽  
Measurement Errors ◽  
High Speed ◽  
Performance Test ◽  
Test System ◽  
Electrical Performance ◽  
Durability Test ◽  
Limit Test

New standards in the automotive industry highlighted the situation of the actual operation of the alternator and a variety of harsh environment simulation limit test. Using new standards in the automotive industry as a guide, this article presents a virtual instrument based on the durability of automobile generator integrated test system. The design adopt virtual instrument technology in designing the system, Graphic language, LabVIEW is applied in writing measure-control program. The system uses a lot of features on LABVIEW, including Data acquisition, control of serials port, etc. Test implementation uses the host computer via RS232 and RS485 communication port and the data acquisition card, NI PCI- 6221, to control the frequency hybrid motor, temperature control box, electronic loads and other intelligent devices, and to simulate a variety of automotive alternator working conditions and real-time monitoring to monitor the status of generators. Using this system, two separate automobile alternators can be tested in terms of high-speed vehicle impact and high temperature durability test and electrical performance test and other tests at the same time. As a result, the generator speed measurement error is within 1%, the control error is within 2%, voltage and current measurement errors were within 0.5% and 0.4%, which meets the requirements.

The Stiffness Analysis and Modeling Simulation of Ball Screw Feed System

2010 ◽  
Vol 97-101 ◽  
pp. 2914-2920 ◽  
Author(s):  
Qin Wu ◽  
Zhi Yuan Rui ◽  
Jian Jun Yang
Keyword(s):  
Machine Tool ◽  
Control Strategy ◽  
Feedforward Control ◽  
Dynamic Performance ◽  
Numerical Control ◽  
Ball Screw ◽  
Axial Stiffness ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Feed System

The computer numerical control (CNC) machine tool was investigated and the dynamics model for the servo feed system was established. Based on the fixing constraint of the ball screw, the mathematical models of axial stiffness and torsion stiffness are constructed. According to the effects of stiffness on the dynamic performance, the simulation model for CNC machine tool feed system with stiffness considered was set up by the dynamic simulation tool Simulink, and a curve representing the performance of the system was obtained. To reduce the effect of stiffness on the system, the feedforward control strategy is used for stiffness compensation. The simulation results show that the stability and response performances of the system are improved and the steady-state error of the system is reduced by the control strategy.

A Circular Interpolation Algorithm for NC Machining Trace Control Based on Angle Approximation Theorem

2010 ◽  
Vol 439-440 ◽  
pp. 823-827
Author(s):  
Shu Fa Chen ◽  
Zong Ling Li ◽  
Fu Shan Han
Keyword(s):  
High Speed ◽  
Approximation Theorem ◽  
Numerical Control ◽  
Feed Speed ◽  
Interpolation Algorithm ◽  
Practical Application ◽  
Numerical Control Machining ◽  
Error Accumulation ◽  
Circular Interpolation ◽  
Differential Analyzer

. DDA（Digital Differential Analyzer）circular interpolation algorithm is often applied to NC（Numerical Control） machining trace control, due to the greater error accumulation in DDA interpolation algorithm, the maximum feed speed of machine tool is limited, and the interpolation algorithm is hardly satisfied with the requirements for high-precision and high-speed machining. To solve this problem, a new circular interpolation algorithm based on the angular approximation method was proposed, the fundamental rule, calculation program and calculating process were introduced, and then, this interpolation algorithm was compared with the other DDA interpolation algorithm in error accumulation. It is concluded from comparative analysis and practical application that the new interpolation algorithm does not exist any accumulative error in the speed and outline, the interpolation error is little, the algorithm is simple and easy to be realized as well.

Design of the Output Performance Test System of Permanent Magnet Linear Force Motor

2014 ◽  
Vol 621 ◽  
pp. 392-399
Author(s):  
Xin Xin Cheng ◽  
Xu Dong Pan ◽  
Guang Lin Wang
Keyword(s):  
Data Acquisition ◽  
Performance Test ◽  
Mechanical Energy ◽  
Test System ◽  
Test Method ◽  
Step Motor ◽  
Feed System ◽  
Current Output ◽  
Linear Force ◽  
A Performance

Electrical energy directly converted into mechanical energy of linear motion by linear force motor, greatly enhancedthe rapid response ability and control precision of the feed system. The product quality of linear force motor can be effectively improved by design a performance test system of linear force motor. The paper designed a performance test system of linear force motor based on the Labview virtual instrument platform, and test project of linear force motor has been planned, the test method, the structure of the test device, power drive module, step motor load part, data acquisition and the software system all have been completed. The test system realized automatic and manual two different kinds of test methods, data acquisition and management and processing function and the good human-machine interface, the linear force motor dynamic and static parameter, including input current, output force and output displacement and the relationships between them have been tested.

Friction and Wear Behaviors of CAPVD TiAlN Coating

2013 ◽  
Vol 645 ◽  
pp. 101-104
Author(s):  
Ai Hua Liu ◽  
Ze Shen Liu ◽  
Peng Zhang
Keyword(s):  
High Speed ◽  
Friction And Wear ◽  
Vapour Deposition ◽  
Test System ◽  
Test Results ◽  
Wear Properties ◽  
Tialn Coating ◽  
Cathodic Arc ◽  
Wear Tests ◽  
Ball On Disc

The paper reports friction and wear study of TiAlN coating at different speeds and loads. The coating was deposited on YG6 (WC+6 wt.% Co) cemented carbide by cathodic arc physical vapour deposition technique. Ball-on-disc wear tests were performed on the CETR UMT-2 test system against SiC balls. The coating character and test results were obtained through SEM, XRD and Wyko surface profilometer. The results are as follows: The value of friction of coefficients decreased and depth of wear tracks became smaller as speeds and loads increased. TiAlN coating showed excellent anti-wear properties at high speed and high load, and was more suitable for these similar working conditions.

Simulation Analysis of Feed System Control Characteristics in High-Speed Computer Numerical Control Lathe Based on MATLAB

2013 ◽  
Vol 278-280 ◽  
pp. 1620-1626
Author(s):  
Ze Qing Yang ◽  
Li Bing Liu ◽  
Zuo Jie Wang ◽  
Song Zhang
Keyword(s):  
Response Time ◽  
High Speed ◽  
Dynamic Stiffness ◽  
Linear Motor ◽  
Numerical Control ◽  
System Control ◽  
Control Parameters ◽  
Feed System ◽  
Integral Response ◽  
Speed Computer

In order to determine the high-speed Computer Numerical Control (CNC) lathe linear servo system control parameters reasonably, the linear motor feed system control model was established based on analysis of high-speed linear feed system control principle, and the linear motor feed system transfer function was established, and servo dynamic stiffness factors were analyzed. The control parameters of the servo system and actuating mechanism parameters of feed system on the effect of the linear motor servo dynamic stiffness were analyzed using MATLAB software. The simulation results show that the position loop proportional gain, speed loop proportional gain and speed loop integral response time are the biggest Influence factors on servo dynamic stiffness. The displacement response is reduced under the cutting interference force step inputting, while the position loop proportional gain, speed loop proportional gain and speed loop integral response time are increased, and the servo dynamic stiffness is increased, the number of system oscillation is also reduced, and the system tends to be stable.

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