Shanghai Daoqin Plastics Co., Ltd.

        近几 year,我国 mold development very fast, technology upper has very large improve/increase is and water also has 一 差距,我们 in use mold 时, also 会出现一 fault/failure,如: in use mold process in, mold 会发生爆裂, this is in mold technology upper 一 严 heavy defect, that about/regarding mold causes has which 呢? its main/primary below/following 几点.

         mold causes analysis:

        1. mold 材质不 good in rear processing in easy 碎裂

        2. hot 处理: 淬火回火 process generate deformation

        3. mold abrasion degree 不够, generate deformation

        4. design process: mold strong/high degree 不够, 刀口间距太近, mold structure combined 理, sheet/plate block 数不够无垫 sheet/plate 垫脚

        5.线割处理不当: 拉线线割, 间隙不 for, as 清角

        6.冲床 equipment selection: 冲床吨位, force 不够, lower deep

        7.脱 material 不顺: production front magnetic 处理, material 梢; production in has 断针断 elastic and other material

        8.落 material 不顺: 组装模时无漏屎, or 滚堵屎, 垫脚堵屎

        9. production 意识: sheet/slice pressure, 定位不 to 位, use gas 枪, sheet/plate has cracks still production

         mold how to anti 范:

        1, pressure equipment

        冲 pressure equipment (如 pressure machine) degree and rigid property for lifespan effect/influence is important. pressure equipment degree high, rigid property good, lifespan large is improve/increase. especially small or 无间隙冲模, hard alloy and precision 冲模必 must selection degree high, rigid property good pressure machine, 否则, will reduce mold lifespan, heavy also loss bad tool.

        2, mold design

        (1) mold toward machine degree. is improve/increase mold lifespan, must according to property and parts degree and other requirements, positive selection toward and 确定导 toward machine 构 精 degree.

        (2) mold (凸, 凹模)刃口几何 parameters. 凸, 凹模 形状, combined and semi not only for pressure parts formed has relatively large effect/influence, but also for/regarding mold abrasion loss and lifespan effect/influence very large. degree requirements relatively high, relatively small value;反之则 can add large 间隙, improve/increase mold lifespan.

        3, pressure process

        (1)冲 pressure parts Raw Materials.

        ①尽 can can using/adopting pressure process property good Raw Materials, decrease/reduce pressure deformation force;②冲 pressure front 应严格检查 Raw Materials grade, thick degree and surface quality and other, will Raw Materials scratch dry 净, necessary 时应清 remove surface oxidation material and 锈迹;③ according to pressure and Raw Materials types type, necessary can soft 化处理 and surface treatment, and selection combined lubricant and lubricated 工序.

        (2)排样 and 搭边.

        不 combined 理 往复送 material method and small value 往往会造 formed mold abrasion loss or 凸, 凹模啃伤. must according to parts processing amount, quality requirements and mold combined 间隙, combined selection methods and value, improve/increase mold lifespan.

        4, mold material

        ①材 material use property can tool has high hardness (58~64HRC) and high strength, tool has high wear resistance and tough property, hot deformation small, has hot hard property;② process property can good.

        5, hot processing process

         mold hot processing quality for mold property can and use lifespan effect/influence large.

        (1)锻造 process. this is mold as parts manufacturing process in important step/link. 应严格 control temperature degree scope/range, made positive add hot specification, using/adopting positive 确 锻造 force method, and rear cold or and 时退火 and other.

        (2)预备 hot 处理. mold as parts material and requirements different separation using/adopting 退火, positive or and other hot process, improvement 组织, remove 锻造毛坯 组织 defect, improvement processing process property.

        (3)淬火 and 回火. this is mold hot in key/critical step/link. 冲模淬火 add hot especially attention/notes anti oxidation and carbon, 应严格 control hot process specification, in conditions 允许 情况 lower, can using/adopting true hot 处理. rear and 时回火, according to technology requirements using/adopting different process.

        (4)消应 force 退火. for/regarding degree requirements high mold, in abrasion or electrical processing rear also 需经 消应 force 回火处理, has stability mold degree, improve/increase use lifespan.

        6, processing surface quality

        ① mold as parts processing process in must anti abrasion 削烧伤 parts surface phenomenon, 应严格 control abrasion process conditions and process methods (如砂轮 hardness, degree, cooling liquid, to amount and other parameters);② processing process in anti mold as parts surface has 刀痕. 夹层, cracks, 撞击伤痕 and other macro defect. this defect in 会引起应 force in, formed is fracture 根源, formed mold 早期失效;③ using/adopting abrasion 削, abrasion and light and other processing and fine processing, obtain relatively small surface coarse degree value, improve/increase mold use lifespan.

        7, surface strong/high 化处理

         is improve/increase mold property can and use lifespan, mold as parts surface strong/high 化处理 application 越 越广. commonly used table/sheet strong/high 化处理 methods has: liquid carbon nitrogen 共渗, 离子渗 nitrogen, 渗硼, and electrical strong/high 化, and chemical gas versus method (CVD), material gas versus method (PVD) and in salt in toward parts surface carbon material method (TD) and other.

        8, 线切割变质层 control

        冲模刃口 more using/adopting 线切割 processing. due to 线切割 processing hot and electrical understanding function, make mold processing surface generate thick degree 变质层, formed surface hardness reduce, 出现显 micro cracks and other, make 线切割 processing easy 发生早期 abrasion loss, effect/influence mold 冲裁间隙 maintain and 刃口容 easy 崩刃, shrink short mold use lifespan. therefore, in 线切割 processing in selection combined electrical 规准, amount decrease/reduce 变质层 deep degree.

        9, positive use and combined 理维护

         is positive production, improve/increase pressure parts quality, reduce cost, long lifespan, must positive use and combined 理维护 mold, 严格执行冲模“三检查” made degree (use front 检查, use process in and use rear 检查), good and 维护检修工 as.