Shanghai Daoqin Plastics Co., Ltd.

         due to pressure different, as conditions different, formed mold causes is more 方面. lower 面就冲模 design, manufacturing and use and other comprehensive analysis mold causes, 并做出 versus improvement measures.

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

         different mold lifespan different. is 此, for/regarding 冲模工 as parts material, 提出两项 basic requirements:

        (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. 冲模工 as parts processing manufacturing process generally relatively is complex, 因而, must tool has for various processing process property, can property, can processing property, hard property, property, cracks property and abrasion processing property and other.

        【冲 pressure mold use process in formed mold causes 】

        2. hot 处理: 淬火回火 process generate deformation

        实践证明, mold hot processing quality for mold property can and use lifespan effect/influence large. from mold causes analysis statistics can 知, hot 处理不当 引发 mold 失效“事故”约占40% above.

        (1)锻造 process 　　 this is mold as parts manufacturing process in important step/link. for/regarding high alloy tool mold, usually for material carbon material distribution and other versus 组织提出 technology requirements.

        (2)预备 hot 处理　　应视 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. high carbon alloy mold 钢经 适当 预备 hot 处理, can remove 网状二次渗 carbon or carbon material, make carbon material 球化, fine 化, promote carbon material distribution uniform property, this has ensure 淬火, quality, improve/increase mold lifespan.

        (3)淬火 and 回火　　 this is mold hot in key/critical step/link. 若淬火 add hot generate hot, not only make parts formed relatively large property, but also, in cooling easy deformation and cracking, heavy effect/influence mold lifespan. 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　　 mold as parts in coarse processing rear, 应进行消应 force 退火处理, its is remove coarse processing formed internal stress, 以免淬火时 generate large deformation and cracks. 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.

        3. mold abrasion degree 不够, generate deformation

         mold as parts surface quality excellent poor, for/regarding mold wear resistance, resistant fracture can force and resistant viscous can force and other has separation 密切 关系, effect/influence mold use lifespan, especially is surface coarse degree value for mold lifespan effect/influence very large. surface coarse degree value large, in as generate force in phenomenon, in its 峰, 谷间容 easy generate cracks, effect/influence resistant use degree, also effect/influence parts surface resistant property, effect/influence use lifespan and degree, is 此, attention/notes below/following 事项:

        (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.

        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, sheet/plate 垫脚, mold toward 不准, 间隙不 combined 理.

        (1)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. combined selection methods and value, improve/increase mold lifespan.

        (2) mold toward machine degree 　　准确 and can 靠 导 toward, for/regarding decrease/reduce mold as parts abrasion loss, 避免凸, 凹模啃伤 effect/influence large, especially is 无间隙 and small 间隙冲裁模, clamping and more grade 进模则 more is has 效. 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.

        (3) mold (凸, 凹模)刃口几何 parameters.

        5.线割 process

        人 is 拉线线割, 线割间隙处理不 for, as and 线割 变质层 effect/influence.

        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.

        6.冲床 equipment selection

        冲床吨位, force 不够, lower deep.

        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. 例如: complex silicon sheet/slice 冲模材 material is Crl2MoV, in 普通开式 pressure machine upper use, 平均复 abrasion lifespan is 1-3万次;而 new precision pressure machine upper use, 冲模 复 abrasion lifespan can 达6-12万次.

        7.冲 pressure process

        冲 pressure parts Raw Materials thick degree ultra- 差, material property can 波动, surface quality relatively 差(如锈迹) or dry 净(如油污) and other, formed mold as parts abrasion loss add 剧, easy and other defect rear 果. is 此, attention/notes:

        (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, 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.

        8. production as positive use and combined 理维护.