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1、英文原文Influence factors on the quality of the workpiece surfaceProcessing process on the surface quality of the influenceThe vibration of the process system of the influence on the quality of the surfaceIn mechanical processing process technology system sometimes occur vibration, that is, in the cutti
2、ng edge tool and workpiece is cutting surface except on the name between cutting motion, but also can appear a cyclical relative motion.Vibration that process system by forming movement of the interference and damage, make processing surface appear chatter marks, increases the surface roughness valu
3、e, worsening processing surface quality.Cutter geometrical parameters, materials and cutting quality to the surface quality of the influenceThe cutting tool geometric parameters on the surface roughness of the biggest influence is vice PianJiao, the main point PianJiao, arc radius. Under certain con
4、ditions, reduce PianJiao, Lord, vice PianJiao point arc radius can reduce surface roughness. Under the same conditions, carbide cutting tools process of surface roughness value less than high speed steel paper cutting knife, and diamond and CBN) tools and better than hard alloy, but because the diam
5、ond and iron family affinity materials, it should not be used for processing iron family materials. In addition, the cutting tool before and after the face, cutting knife blade itself directly influence the roughness of the processing the roughness of the surface, therefore, improve the quality of c
6、utting tool, cutting tool and face, cutting knife blade roughness value should be lower than the roughness of the 1 2 levels.Cutting fluid to the influence on the quality of the surfaceCutting fluid cooling and lubrication effect can reduce the cutting process of interface friction, reduce the tempe
7、rature of cutting zone, the cutting metal surface layer of plastic deformation degree down, restrain the develop the thorn and scales produced in the production of different materials for reasonable choice of cutting fluids can reduce the surface roughness.The workpiece material on the surface quali
8、ty of the influenceThe workpiece material nature; Processing plastic materials, the cutting tools for metal extrusion produced plastic deformation, and the cutting tool and workpiece forced separation of the torn scraps effect, make the surface roughness value increase. The workpiece material tenaci
9、ty the better, metal, plastic deformation, the bigger the processing surface is the more the rough. Processing brittle material in the chip broken granular, due to the collapse in broken and endows the machined surface left many pitted surface roughness.General toughness large plastic materials, pro
10、cessing after large surface roughness, and toughness of smaller plastic materials, processing to get smaller after the surface roughness. For the same kind of material, the greater the grain size of the organization, the larger the surface roughness. Therefore, in order to reduce the surface roughne
11、ss, often in cutting processing of material before quenching and tempering or is the fire of treatment to obtain homogeneous fine grain organization and high hardness.Cutting condition the influence on the quality of the surfaceAnd cutting condition of the relevant process factors, including cutting
12、 dosages, cooling lubrication. In low speed processing plastic materials, easy to produce the devolop and scales thorn, so, improve the cutting speed, can reduce the devolop and scales thorn, decreasing part already the surface roughness value; For brittle material, general wont form the devolop and
13、 scales thorn, so, cutting speed on the surface roughness basically no influence. The increase speed, plastic deformation also increases, the surface roughness increases, so, reduce the speed can reduce the surface roughness value, however, feeding reduced to certain value, roughness wont obviously
14、decreased. Normal cutting conditions, cutting depth on the surface roughness the impact is not big, therefore, mechanical process cannot select the too small cutting depth.Cutting speed on the surface roughness influenceGeneral at the early choose low speed cutting and finishing choose high speed cu
15、tting can reduce the surface roughness. In the medium speed cutting plastic materials, due to easy to produce the devolop, and plastic deformation is bigger, so after processing parts surface roughness is bigger. Usually by low or high speed cutting plastic material, can effectively avoid the devolo
16、p of generation, this to reduce table and roughness have positive role.On the surface quality of the grinding effectsThe influence of the grinding wheel grinding wheel granularity the thinner, per unit area grain number grinding, the more of the grinding surface in fine scratches the surface roughness is small; But if too fine granularity, processing to jam wheel it will increase the surface roughness, also easy to produce the ripple and cause burns. The
