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 Wysłany: Pon 11:50, 10 Sty 2011 Temat postu: ugg stivali Tube spinning Residual Stress in _1906 |
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Tube spinning simulation of residual stress
Figure 3 is a positive spin when the thinning rate of different residual stress calculation. It can be seen,[link widoczny dla zalogowanych], the distribution of residual stress when spinning the outer surface is affected by hills, the surface tension,[link widoczny dla zalogowanych], the absolute value of axial residual stress was significantly greater than the absolute value of the tangential residual stress, residual stress calculated to meet the equilibrium condition . 0I2340 wall thickness (ram) wall thickness (ram) 6 Figure 3 is rotating along the wall when the residual stress distribution of n) E = 20Ib) f = 4OFig. 3Residualstressdistributionsalongthicknessinforwardtubespinning5 measured results of residual stress on the cylindrical spinning pieces we had the residual stress measurement, measuring instruments for the ray stress analyzer. Spinning pieces of material 30CrMnSiA. Spinning experiment was introduced from Germany LEIFELD company ST56-90CNC three roller carried out on CNC spinning machine. Figure 4 is the location of residual stress measurement points. Table 1 is spinning pieces tangential residual stress of the outer surface of the test results. Failure outside the failure surface of a spinning pieces tangential residual stress of the surface area {Yong given tangential residual stress (MPa) 1-2002-2403-2204-1805-1806-1407-18O8-160g-I60 Figure 4, the amount of residual stress {Yong Location Fig · 4Themeasuredpositio [isofresidualsttess. Mechanical Engineering 60 Volume 5, the outer surface of the axial spin components in ~ 5OO ~ residual stress within a 560MPa change. Figure 5 [3],[link widoczny dla zalogowanych], the test results can be seen from the above, x-ray residual stress measurement and numerical calculation results are consistent. 6 Conclusion 1) The rejection of numerical method to predict the spin of the residual stress distribution of cylindrical part is feasible,[link widoczny dla zalogowanych], consistent with the measured results. 2) The spinning barrel with the outer surface of residual stress is negative, the surface is positive, and with the reduction rate increases,[link widoczny dla zalogowanych], its absolute value increases. Throughout the thickness direction, the absolute value of axial residual stress than the tangential residual stress O thickness (mm) Figure 5 measures the wall thickness distribution of residual stress Ⅲ Fig-5Residualstressdistributionalongthethickness. Absolute value of the large, which explains Tube Spinning, shear deformation small. 3) in accordance with performance requirements of the workpiece so that rejection, rejection of numerical simulation in optimization of process parameters to obtain the desired residual stress distribution. References 1 Kezhi Lu Yan. Cylindrical pieces of anti-rotation law of the displacement distribution. Science Bulletin, 1997,42 (5): 553 ~ 5562 Xu Bing industry. Chen Sen Can. Simple plastic theory tutorial. Tsinghua University, a spacious community. 1981; 10O ~ 1043 Gewen Han. Spinning Cylinder parts of the distribution of residual stress. Metalforming Machinery, 1985 (3); 2 ~ 7NUMERICALSIMULAT10N0FRESIDUALSTRESS0FSPUNCYLINDRICALSHAPESLiKezhiLiHejun (NorthwesternPolytechnicalUniversity710072) LuYanXueKemin (HarbinInstituteofTechnolosy150001) AbstractThedistributionofresidualstressofspuncylindricalshapesonthicknesshaeensimulatedbylargestrainelasto · plasticfiniteelementmethod. Theeffectsoftheprocessparametersonthedistributionsofresidualstressarediscussedinthispaper. Thenumericallysimulatedandexperimentalresultsgiveagcoda-greement. Keywordsresidualstress, tubespinning. elasto-plasticfiniteelementmethod, numeri: a1simulatuion
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