Shanghai Daoqin Plastics Co., Ltd.

        一幅 mold is more parts 组配而 formed, parts quality effect/influence mold quality, parts most quality also is processing formed ensure, therefore control good processing heavy large. in inner large more mold manufacturing enterprise, processing stage/phase using/adopting methods generally is abrasion 削, electrical processing and 钳工处理. in this stage/phase need control good parts deformation, internal stress, 形状公差 and dimensions degree and other many technology parameters, in specific production in, as difficult relatively more, still has many has experience methods value 借鉴.

         mold parts processing, according to parts appearance different, large can parts separation type: sheet/plate type, parts and type, its process process large is: coarse processing —— hot 处理(淬火, 调质)——精 abrasion —— electrical processing ——钳工(surface treatment)——组配 processing.

        1, parts hot 处理

         parts hot 处理工序, in make parts obtain requirements hardness meanwhile, also for internal stress control, ensure parts processing dimensions stability property, different separation has different methods. in recent years mold industrial development, use material types type increase more, remove Cr12, 40Cr, Cr12MoV, hard alloy outer, for 一 工 as strong/high degree large, force 苛刻 凸, 凹模, can selection new material powder alloy 钢, 如V10, ASP23 and other, type tool has relatively high heat stabilized property and good 组织状态.

        针 for 以Cr12MoV is parts, in coarse processing rear 进行淬火处理, rear parts in very large 存留应 force, easy 导致精 processing or as in cracking, parts rear hot 回火, remove 淬火应 force. temperature degree control in 900-1020℃, rear cooling 至200-220℃出炉空 cold, rear speed 回炉220℃回火, this type of methods is one-time hard process, can obtain relatively high strong/high degree and wear resistance, for/regarding abrasion loss is main/primary 失效形式 mold relatively good. production in to 一 拐角 relatively more, complex parts, also 不足以消 remove 淬火应 force, processing front also 需进行 应 force or more 次时效处理, separation 释放应 force.

        针 for V10, APS23 and other powder alloy parts, its can high temperature 回火, 淬火时 can using/adopting hard process, 1050-1080℃淬火, again use 490-520℃ high temperature 回火并进行 more 次, can obtain relatively high impact tough property and stability property, for 以崩刃 is main/primary 失效形式 mold very suitable. powder alloy 钢 造价 relatively high, its property can good, positive in formed types 广泛运 use trend.

        2, parts abrasion processing

         abrasion processing using/adopting machine has types main/primary type type: abrasion 床, inner outer abrasion and tool abrasion tool. processing abrasion need control abrasion deformation and abrasion cracks generate, make is separation micro small cracks, in rear processing use in 也会显露出. therefore, abrasion need small, can large, cooling liquid need separation, dimensions in 0.01mm以 inner parts need amount temperature abrasion 削. 由计算 can 知, 300mm long parts, temperature 差3℃时, material has 10.8μm left right 变化, 10.8=1.2×3×3(每100mm deformation amount 1.2μm/℃), processing 工序都需充 separation this factors effect/influence.

        精 abrasion selection good abrasion 削砂轮十 separation important, for mold high high 钼状况, selection GD mono rigid 玉砂轮 comparison suitable, processing hard alloy, hardness high 材质时, 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 can 达Ra=0.2μm, in recent years, new material application, CBN砂轮, 也即立方 nitrogen 化硼砂轮显示出十 separation good processing 效果, in molding abrasion, abrasion 床, CNC inner outer abrasion upper processing, excellent its it types type 砂轮. abrasion processing in, need attention/notes and 时修整砂轮, maintain 砂轮 锐利, 当砂轮钝化 rear, in parts surface slip scratch, pressure, formed parts surface 烧伤, strong/high degree reduce.

         sheet/plate type parts processing large separation using/adopting abrasion processing, in processing in 常会遇 to types long thin thin sheet/plate parts, type parts processing relatively difficult. is processing 时, in magnetic force function lower, parts generate 形变, 紧贴于工 as surface, lower parts rear, parts also generate deformation, thick degree amount 一致, 但平行 degree to requirements, solution method can using/adopting magnetic abrasion method, abrasion 削时以 and other high block in parts lower 面, 四面挡 block 抵死, processing small 进刀, more light 刀, processing good rear, can use again and other high block, 直接吸附 processing, this can improvement abrasion 削效果, to degree requirements.

        轴 type parts tool has 回转面, its processing using/adopting inner outer abrasion and tool abrasion 床. processing process in, and versus 当于母线, if its in issues, processing 出 工 parts 同样会 generate issues, effect/influence parts quality, therefore in processing front need good and testing as. inner abrasion 削时, cooling liquid need separation to abrasion 削接触位置, 以利于 abrasion 削 顺利排出. processing thin type parts, most good using/adopting process 台, force can large, 否则容 easy in parts upper generate “ inner 三角” deformation.

        3, electrical processing control

        现代 mold factory, can less electrical processing, electrical processing can for type 异形, high hardness parts processing, it separation is 线切割 and electrical 火花二 types.

         slow filament 线切割 processing degree can 达±0.003mm, coarse degree Ra0.2μm. processing 开始时, need 先检查 machine 床 状况, water degree, water temperature, filament degree, force and other factors, ensure good processing 状态. 线切割 processing is in block material upper remove processing, it bad parts has force balanced, very easy 引起应 force in, especially is in 拐角处, therefore 当R<0.2(especially is 尖角)时, toward design 部门提出 improvement 建议. processing in 处理应 force in methods, can use amount principle, processing front 先留余 amount 1mm left right, processing large 致形状, rear again hot 处理, let processing force in processing front 先行释放, ensure heat stabilized property.

         processing 凸模时, filament 切入位置 and selection need fine 考虑. using/adopting 打孔穿 filament processing, most 佳. high 精线切割 processing, usually 切割遍数 is 四次, can ensure parts quality. processing belt/tape has degree 凹模时, fast speed high 效 立场, 第一遍 coarse processing 直边, 第二遍锥 degree processing, again processing 直边, this can 不需进行X段垂直 toward processing, processing 刃口段直边, 既节约 time also cost.

         electrical processing need made as electrical 极, electrical has coarse, separation. processing electrical requirements 形状符 combined property good, most good use CNC数控 machine processing formed. electrical 极 材质 selection upper, copper electrical main/primary used for generally parts processing. Cu-W alloy electrical 极, comprehensive property can good, especially is processing process in consumption amount obvious ratio copper small, combined amount liquid, very combined difficult processing material processing and 截面形状 complex parts processing. made as electrical 极时, need electrical 极 间隙 amount and electrical amount, 当进行 large or heavy electrical processing 时, parts and electrical 极装夹 need solid, ensure tool has strong/high degree, anti processing 松动. deep processing 时, for electrical 极各处 loss consumption and liquid 不畅引起 electrical electrical, need attention/notes.

        4, surface treatment and 组配

         parts surface in processing lower 刀痕, abrasion is force in 方, is cracks expand 展 源头, therefore in processing rear, need for parts surface strong/high 化, through 钳工打 abrasion, 处理掉 processing 隐患. for parts 一 棱边, 锐角, 孔口进行倒钝, R化. generally, electrical processing surface generate 6-10μm left right hard 化层, color white, hard 化层脆 but also belt/tape has 残留应 force, in use front need separation remove hard 化层, methods is surface light, abrasion hard 化层.

         in abrasion processing, electrical processing process in, parts has magnetic 化, tool has micro low magnetic force, separation easy 吸 一 small 东西, therefore in 组装之 front, need for parts as magnetic 处理, use acid 乙脂清洗 surface. process in, 先参看 assembly 图, 找齐各 parts, rear 列出各 parts versus between 装备顺序, 列出各项应 precautions, rear assembly mold, assembly generally 先装导柱导 sleeve/set, rear 装模架 and 凸凹模, rear again for 各处间隙, especially is 凸凹模间隙进行组配 adjustment, assembly formed rear need mold testing, overall report. for issues, can using/adopting toward method, from rear toward front 工序, from processing to coarse processing, 逐一检查, to 找出症结, solution issues.

        实践证明, good processing process control, can has decrease/reduce parts ultra- 差, waste, has improve/increase mold one-time formed rate and use lifespan.