外文翻译--机械加工表面质量

1、机械专业外语文献翻译系 别 机电工程系 专 业 机械设计制造及其自动化班 级 学生姓名 学 号 日 期 2014.6.10 1The Surface Quantity While Machine ProcessesA.the machine processes the surface quantity to use the influence of the function to the machine(A)The surface quantity to bear to whet the sexual influence1. Rough degree of surface to bear to whet the sexual influenceThe rough degree of surface is very big to the influence that the spare parts surface wear away.Say a value of surface generally more small, it wears away sex more good.But r

2、ough degree of surface the value is too small, lubricant not easy storage, contact of the noodles easy occurrence the member glues to connect, wearing away to increase on the contrary.Therefore, the rough degree that contact face have a the best value, it is worth to have something to do with the work circumstance of the spare parts, working to carry the lotus enlargement, wore away the quantity aggrandizement in the early years, rough degree of surface the best value also enlargement. 2. The su

3、rface is cold to make to harden to bear to whet the sexual influenceProcess the surface cold to make to harden to make rub the vice- surface layer the metals of show minute details the degree of hardness exaltation, past can make bear to whet the sex exaltation generally.But is also not cold to make to harden the degree more high, bear to whet sex more high, this is because excessively cold make to harden and will cause the excesssive loose of the metals organization loose, even appear the crack

4、 and surface layer metals peeling off, make bear to whet sex to descend. (B)The surface influence of the quantity upon the tired strengthThe tired breakage that metals produce after be subjected to hand over to change to carry the lotus function usually takes place under the cold and hard layer of the spare parts surface and surfaces, therefore the surface quantity of the spare parts affects to the tired strength very greatly. 1. The surface influence of the rough degree upon the tired strengthA

5、t hand over to change to carry the lotus function under, the surface part of the cave valley of the rough degree causes easily should the dint concentration, produce the tired crack.A value of surface is more big, the crackle of the surface is more deep, the crackle bottom radius is more small, the anti- tired breakage bottom ability is more bad. 2. Remaining dint, cold make to harden to the influence of the tired strengthRemaining dint is very big to the spare parts influence of the tired stren

6、gth.The surface layer remaining pull should the dint will make tired crack extend, accelerating the tired breakage;But the surface layer remaining should the dint can keep tired crack from expand, defer tired breakage of creation. Surface the cold and hard general companion contain remaining of should the creation of the dint, can keep the crack creation from combine the arrestment already has the crack to expand, to raise the tired strength beneficial. (C) the surface quantity to bear the eclip

7、se influenceThe spare parts bears the eclipse to be decided by the rough degree of surface to a large extent.A value of surface is more big, accumulating the causticity material in the then cave valley more many.The anti- eclipse is more bad. Remaining of the surface layer pull should the dint will produce should the dint decay to open the rift , lower the spare parts to bear to whet sex, but Residual stress press should the dint then can preventfrom should dint decay open the rift . (D)The surf

8、ace quantity to match with the influence of the quantityA size for be worth of surface will affect the match quantity of the match surface.Match with for the cleft, a value conference make wear away the enlargement, the cleft enlarge, the match property that break the request.For lead the over match, assemble process in a the convex peak of part of surfaces is push even, actual lead the amount of over let up, lowering the match the conjunction strength of the a.B. the influence surface factor of

9、 the rough degree(A)Slice to pare to process to affect the surface factor of the rough degree1. The knife has several shapes to reply to reflect2. The property of a material of work3. Slice to pare the dosage(B)Whet to pare to process to affect the surface factor of the rough degreeThe influence whets to pare the rough main factor of surface to have: The degree of hardness, emery wheel of a degree, emery wheel of the emery wheel fix whole, whet to pare the speed and whet to pare the path to enter to whet number of times, the work a circumference for quantity and light to enter to the speed and stalks to enter to the quantity and cool off the lubrication liquid.C. affect the factor of process the surface layer physics machine functionIn slice pare process, the work piece because of being

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