Shanghai Daoqin Plastics Co., Ltd.

         in production good mold upper,我们时常会看 to mold surface has 痕, this type of phenomenon is belongs to mold processing defect 而导致, that how to can decrease/reduce mold processing generate various defect 呢?太空 mold large separation below/following key points can decrease/reduce mold processing generate defect.

        1, combined selection and 修整砂轮, using/adopting rigid 玉 砂轮 relatively good, it property can hard 而脆,且 easy generate new 切削刃, therefore force small, abrasion hot relatively small, in degree upper use in and other degree,如46~60目 relatively good, in hardness upper using/adopting in soft and soft (ZR1, ZR2 and R1, R2),即 coarse degree, low hardness 砂轮,自励 property good can reduce hot. abrasion selection 适当 砂轮十 separation important,针 for mold high high 钼状况, selection GD mono rigid 玉砂轮 comparison combined,当 processing hard alloy, hardness high material 时, excellent using/adopting has machine adhesion agent rigid 石砂轮, has machine adhesion agent 砂轮自 abrasion property good, abrasion 出 工 parts coarse degree can 达Ra0.2μm, in recent years,随 new material application,CBN(立方 nitrogen 化硼)砂轮显示出十 separation good processing 效果, in molding abrasion 床, abrasion 床, CNC inner outer abrasion upper processing,效果 excellent its it types type 砂轮. in abrasion processing in, need attention/notes and 时修整砂轮, maintain 砂轮 锐利,当砂轮钝化 rear,会 in parts surface slip scratch, pressure,造 formed parts surface 烧伤, strong/high degree reduce.

        2, combined use cooling lubricated liquid,发挥 cooling, 洗涤, lubricated large function, maintain cooling lubricated 清洁, from control abrasion hot in scope/range inner,以 anti parts hot deformation. improvement abrasion cooling conditions,如 using/adopting 浸油砂轮 or inner cooling and other measures. will liquid 引入砂轮 in 心,切削 liquid can 直接进入 abrasion 削区,发挥 has cooling function, anti parts surface 烧伤.

        3, will hot rear 淬火应 force reduce to most low degree,因 is 淬火应 force, carbon 化组织 in abrasion force function lower,组织 generate versus easy make parts generate cracks. for/regarding high degree mold is remove abrasion residual stress, in abrasion rear 应进行 low temperature 时效处理以提 high toughness.

        4, remove abrasion force can will mold in 260~315℃ salt in 浸1.5 min,然 rear in 30℃油 in cooling, this hardness can decline 1HRC,残留应 force reduce 40%~65%.

        5, for/regarding dimensions in 0.01 mm以 inner precision mold precision abrasion need attention/notes ring temperature degree effect/influence, requirements temperature abrasion 削. 由计算 can 知,300 mm long parts, temperature 差3℃时,材 material has 10.8μm left right 变化,(10.8=1.2×3×3,每100mm deformation amount 1.2μm/℃),各精 processing 工序都需充 separation this factors effect/influence.

        6, using/adopting electrical understanding abrasion processing, improvement mold manufacturing degree and surface quality. electrical understanding abrasion 削时,砂轮刮 remove oxidation film:而不 is abrasion metal,因而 abrasion force small, abrasion hot small,不会 generate abrasion 削毛刺, cracks, and other phenomenon, generally surface coarse degree can excellent 于Ra0.16μm; another,砂轮 abrasion loss small,如 abrasion hard alloy, carbon silicon abrasion loss amount large is abrasion hard alloy weight 400%~600%, use electrical understanding abrasion 削时,砂轮 abrasion loss amount has hard alloy abrasion remove amount 50%~100%.

        7, combined selection abrasion use amount, using/adopting toward to amount relatively small abrasion methods 甚至精 fine abrasion 削. 如适当 decrease/reduce toward to amount and speed degree, increase large toward to amount, make and parts 接触面积 decrease/reduce, dispersion hot conditions to improvement, from has control table/sheet temperature degree improve/increase.