Study on Simulation Reliability Test of Machining Center

2010 ◽  
Vol 34-35 ◽  
pp. 360-364
Author(s):  
Xiang Po Zhang ◽  
Jian Zhong Shang ◽  
Zhuo Wang
Keyword(s):  
Quality Improvement ◽  
Reliability Test ◽  
Test Bed ◽  
Long Cycle ◽  
Machining Center ◽  
Mechanical Products

Reliability research on machining center has great significance for the quality improvement of the machining center and its mechanical products. The long cycle and insufficient accuracy of collecting data is the main problem of the current reliability research on machining center. By means of building a test-bed and simulating the environment and running conditions of live using in the specialized laboratory, the simulation reliability tests, accelerated and enhancement tests are carried out. This paper aims to solve the above mentioned limitations and offer a more effective method for reliability tests on machining center.

Optimization of Reliability Test on the Shell of Portable Electronic Products Based on Taguchi Method

2014 ◽  
Vol 599-601 ◽  
pp. 1021-1024
Author(s):  
Xue Mei Du ◽  
Wei Lei ◽  
Nai Jia Wang ◽  
Jing Yu Ding
Keyword(s):  
Taguchi Method ◽  
Traditional Approach ◽  
Signal To Noise Ratio ◽  
Reliability Test ◽  
Signal To Noise ◽  
Electronic Products ◽  
Long Cycle ◽  
Electronic Product ◽  
New Process ◽  
New Type

Traditional reliability test of electronic products has the feature of many contents, long cycle and rising test fees. This paper analyzes the feasibility of combination of Taguchi method and reliability test. Then, the process of optimizing reliability test is proposed with emphasis on use of Taguchi method such as orthogonal table and signal-to-noise ratio (SNR). Finally, the process is applied to the reliability test on the shell of a new type of portable electronic product developed by C Company, verifying that the new process is operable and can reduce test numbers, time and cost while guaranteeing effectiveness of reliability test compared with the traditional approach.

Reliability Test Design for Five-Axis Machining Center

2010 ◽  
Vol 44-47 ◽  
pp. 834-838
Author(s):  
Xiang Po Zhang ◽  
Nai Hui Yu ◽  
Jian Zhong Shang ◽  
Zhuo Wang
Keyword(s):  
Test Method ◽  
Test Design ◽  
Reliability Test ◽  
Reliability Design ◽  
Reliability Level ◽  
Test Criterion ◽  
Machining Center ◽  
Five Axis

Reliability test is the most effective way to achieve the data needed in machining center’s reliability design and assessment, and also a compulsory technological way to improve the reliability of the machining center. For the purposes of evaluating and improving the reliability level of machining center effectively, a laboratory reliability test for five-axis machining center was designed. This test method designed in this paper has the characteristics of high pertinence and easily realized in engineering, and it can be generalized as a reliability test criterion for five-axis machining center.

Conceptual Design of Tool Storage Based on the Divergent Tree Method

2002 ◽  
Author(s):  
Yanwei Zhao ◽  
Wanliang Wang ◽  
Yingli Zhang ◽  
Zhengchu Wang
Keyword(s):  
Conceptual Design ◽  
Design Process ◽  
Divergent Thinking ◽  
Design System ◽  
Machining Center ◽  
Computer Aided ◽  
Mechanical Products ◽  
Intelligent Computer ◽  
Tree Method

The divergent tree method was adopted in this paper, and an illustrative example of tool storage design in the machining center was given to describe the divergent thinking in the conceptual design process of mechanical products. Firstly general divergent tree method was applied to get various schemes of storage, then the primary schemes were achieved by using the measure of known characteristics, finally the excellent degree appraisal approach was applied to find out the optimum one. In addition, an intelligent computer aided conceptual design system of tool storage based on the divergent tree method and excellent degree appraisal approach was demonstrated in this paper.

scholarly journals Design and Research of Bearing Reliability Test Bed Based on Multi-Dimensional Vibration Loading

2021 ◽  
Vol 2101 (1) ◽  
pp. 012045
Author(s):  
Yanzhong Wang ◽  
E Shiyuan
Keyword(s):  
Test Chamber ◽  
Reliability Test ◽  
Test Bed ◽  
External Excitation ◽  
Rolling Bearings ◽  
Dynamic Reliability ◽  
External Vibration ◽  
Vibration Loading ◽  
Flexible Material ◽  
Vibration Excitation

Abstract Rolling bearings are widely used in aviation, aerospace and other important fields, and their reliability is greatly affected by external vibration excitation during service. Due to the large volume and high cost of the combined structure of shaking table and test chamber, this paper designed a dynamic reliability test bed specially for rolling bearings to study the influence of external vibration excitation with different directions, frequencies and amplitudes on vibration signals and service life of rolling bearings. The test bed is loaded with external excitation by means of electromagnetic shakers in two directions, and the flexible material is used to realize the displacement of the test chamber under two external excitation directions at the same time. The bearing vibration loading life test carried out by this test bed has important guiding significance for the design of rolling bearing. The experimental results show that the test bed can apply axial and radial vibration loads of 1-800Hz sinusoidal waveform, and the vibration acceleration can reach 1g, which can simulate the effect of actual working conditions.

Application with Theory of Vibration Equivalence on Reliability Test Bed of Train Brake System

2010 ◽  
Vol 34-35 ◽  
pp. 1978-1982 ◽  
Author(s):  
Xiao Yan Wang ◽  
Meng Ling Wu ◽  
Zhong Kai Chen
Keyword(s):  
Random Vibration ◽  
Brake System ◽  
Quantitative Relation ◽  
Reliability Test ◽  
Test Bed ◽  
Sinusoidal Vibration ◽  
Equivalency Theory ◽  
Environmental Vibration ◽  
Circular Frequency ◽  
Vibrating Table

In order to design a reliability test bed for train brake system, theory of vibration equivalence was used to represent in laboratory the environmental vibration. Firstly, the root mean square (RMS) value of the acceleration was calculated for train brake system according to IEC 61373. Then, a configuration of vibrostand was proposed for the reliability test bed, which was mainly composed of vibrating table-board, vibrator motor, damp and four vibrating springs, as shown in figure 2. After that, an equation was got according to the RMS equivalency theory. Finally, the equation was solved according to the feature of the vibrostand. And the quantitative relation was got for exciting force F0, shock excitation circular frequency ω and spring rate k. The method can also be used on other occasions where sinusoidal vibration is needed to replace random vibration.

Reliability Evaluation for Complex Machinery Products

2011 ◽  
Vol 480-481 ◽  
pp. 763-768
Author(s):  
Feng Du ◽  
Zhi Wei Guan ◽  
Yi Zhou
Keyword(s):  
Random Process ◽  
Process Model ◽  
Large Scale ◽  
Model Identification ◽  
Reliability Evaluation ◽  
Reliability Theory ◽  
Reliability Test ◽  
Treatment Procedure ◽  
Evaluation Mode ◽  
Mechanical Products

For those large-scale and complex mechanical products, considering economy and applicability, these products are impossible to be discarded as soon as they take place malfunction. Generally, they can be reused again and again after be repaired repeatedly, that is, they usually have multi-lifespan. Accordingly, it is very necessary to establish a kind of proper reliability evaluation mode for these complex repairable products. In this paper, the treatment procedure of the reliability test data for these repairable products is researched based on the repairable reliability theory, and the method of model identification about failure distributions law is proposed. In addition, how to reasonably determine or predict product lives by using random process model is also introduced. Finally, an analysis case for putting this mean into practice is expounded. This method for product reliability analysis is suitable to most large-scale and complex mechanical products.

Fatigue Life Analysis of Shaking Table’s Exciting Beam Based on Finite Element Analysis

2011 ◽  
Vol 421 ◽  
pp. 208-211
Author(s):  
Hai Bin Gong ◽  
Jian Su ◽  
Dong Lin Zhang ◽  
Li Wang ◽  
Xing Yu Wang
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Large Scale ◽  
Time History ◽  
Shaking Table ◽  
Reliability Test ◽  
Test Bed ◽  
Element Analysis ◽  
Exciting Beam ◽  
Fatigue Life Analysis

With large scale increases of the train speed, the development of one reliability test bed which can simulate vibration environment becomes the extremely urgent task. The shaking table is one of key reliability test equipments, and its design and development is in needs immediately. The fatigue strength is basic design index of shaking table. Based on the load time history acquired by track spectrum, combined with finite element model of exciting beam and material properties, the fatigue life of exciting beam is predicted by Miner cumulative damage rule method in this paper.

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