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Die cores are made of fixed materials, thus they are exempted from the setting of control factors, which is because the crack is yielded from punch but wearing, thus if using the material with high hardness but brittle (low cobalt content), or the material with low hardness but soft (high cobalt content), then the die core would be more easily cracked.
Therefore, with the consideration of cost for making die, less materials were used to reduce the material costs, we reselected the best combination is A1, B1, C3 and D3.
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In the process of experiments, every subject was asked to sit in the test seat for 10 minutes without any hard materials in clothes, while BPD test data were collected by Xsensor system.
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Introduction of 3D discontinuous contact computation model In ordinary design of segment, there is one layer of sealing gasket (epdm material), which located at 30mm near the outside surface of segment.
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Materials and Methods 2.1 .Wiener Filter Wiener filters seem to be a class of optimal linear filters that require linear measurement from a certain connected sequence of the required signal sequence.
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Material and Methods Study area .
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Introduction Along with social progress, because of the reduction of the cost of magnesium and gradually increasing of the corrosion resistance of magnesium alloy, the magnesium alloys are increasingly widely used for structural materials.
The application of the material is not only decided by its own performance but also dependent on the forming technology of the material, while the welding is the widely used material forming technology in the material joining technology.
Oxide film can easily form, the pores and cracks can be easy to produced in the weld metal and other defects while magnesium alloy welding, it makes the mechanical properties of welded joints decrease, resulting in poor welding of magnesium alloy, difficult to realize the reliable connection between the structure of magnesium alloy and magnesium alloy and other materials, which has become one of the key technologies restricting the application of magnesium alloy and be solved[1].
Acknowledgements This work was supported by National Natural Science Foundation: the Robot Welding Penetration Control of Magnesium Alloy Based on the DE-GMAW and Intelligent Robotics Institute, Nanchang University.
Journal of Lanzhou University of Technology, 2011

Processing material is W18Cr4V.
Material volume of peaks Vmp is shown in Fig. 7
Acknowledgements This work was financially supported by the Natural Science Foundation of Heilongjiang Province of China (No.
Cui, etc.: Applied Mechanics and Materials.
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