Shanghai Daoqin Plastics Co., Ltd.

         一, mold block methods

         shrink short design cycle improve/increase design quality is shrink short mold development cycle key/critical 之一. block design is utilizing product parts in structure and function upper versus property, achieve product standards and combined 化. a large amount of table/sheet 明, block design can has decrease/reduce product design time improve/increase design quality. therefore 本文探索 in mold design in use block design methods.

         mold block design 实施:

        1, 建立模 block 库

        模 block 库 建立 has steps:模 block separation, 构造特征模 type and use 户自定义特征 生 formed. standards parts is block 特例, in block in. standards parts 定义 需进行 rear steps. block separation is block design 第一步. block separation is combined 理, effect/influence block system function, property can and cost. type product block separation must technology 调研并反复论证才 can separation 结果. for/regarding mold 而言, function block and structure block is versus 包容. structure block in local scope/range inner can has relatively large structure 变化, it can function block;而 function block local structure can can relatively solid 定, it can structure block. block design formed rear, in Pro/E parts / assembly (Part/Assembly)空间 in 手工建构 需模 block 特征模 type, use Pro/E use 户自定义特征 function, 定义模 block can parameters: can dimensions and assembly 关系, formed use 户自定义特征(User-Defined Features,UDFs). formed use 户自定义特征文 parts (以gph is rear 缀 文 parts) rear separation technology 取名存储, formed block 库 建立.

        2, block tube/pipe system development

         system through 两次推理, structure selection and block 自动建模, achieve block 确定. one-time to block large structure, 第二次推理 most 终确定模 block has parameters. through this type of achieve block " can property " target/goal. in structure selection in, system use 户输入 模 block 名称, function parameters and structure parameters, 进行推理, in block in suitable block 名称.

         if 不满意该结果, use can 指定模 block 名称. in this to block still is 不确定, it less dimensions parameters, degree, material and assembly 关系 定义. in 自动建模推理 in, system utilizing dimensions parameters, degree 特征, material and assembly 关系定义, use 户自定义特征模 type, 动态, will block 特征模 type 构造出 并自动 assembly. 自动建模函数运 use C语言 and Pro/E development tool Pro/TOOLKIT development formed. through block use can speed formed mold design. application system rear mold design cycle obvious shrink short. due to in block design true 考虑 模 block quality, for mold quality 起基础 ensure function. block in is versus 互独立 UDFs文 parts, therefore system tool has can expand property.

        二, mold manufacturing process in defect and anti measures

        1, processing

         high carbon, high alloy 钢, 例如Cr12MoV, W18Cr4V and other, used for manufacturing mold. this category of different degree in formed separation 偏析, carbon material coarse large non-uniform, non-uniform and other defect. selection high carbon, high alloy manufacturing mold, must using/adopting combined 理 锻造 process formed block 毛坯, this 样一方面 can make 钢材达 to block dimensions and specifications, 一方面 can improvement 钢 组织 and property can. another high carbon, high alloy mold thermally conductive property relatively 差, add hot speed degree can fast, add hot need uniform, in temperature degree scope/range inner, using/adopting combined 理 锻造 ratio.

        2, processing

         mold processing 应严格 ensure dimensions 渡处 圆角 semi 径, and versus 接处应 light slip. if mold processing quality relatively 差, can can in below/following 3 方面造 formed mold loss,1) due to processing 不恰当, formed 尖锐转角 or semi small, 会导致 mold in as generate heavy force in. 2)切削 processing rear surface coarse 糙, has can can in 刀痕, 裂口, and other defect, it is force in 点, also is cracks, cracks or hot fatigue cracks 萌生. 3)切削 processing can full, uniform remove mold bad in made or 锻造时 generate carbon 层, can can in mold hot 处理时 generate non-uniform hard 化层, wear resistance decline.

        3, abrasion processing

         mold in 火, rear generally need abrasion processing, reduce surface coarse degree value. due to abrasion speed degree large, 砂轮粒 degree fine or cooling conditions relatively and other factors effect/influence, mold table/sheet local hot, formed local micro 组织变化, or surface soft 化, hardness reduce, or generate relatively high 残余拉应 force and other phenomenon, reduce mold use lifespan selection abrasion process parameters decrease/reduce local hot, abrasion rear in can can conditions lower 进行 应 force 处理, can has anti abrasion cracks generate. anti abrasion hot and abrasion cracks measures relatively more, 例如: using/adopting force strong/high coarse pellets or adhesion property relatively 差 砂轮, decrease/reduce mold abrasion to amount; selection combined cooling agent; abrasion processing rear 250一300℃ 回火消 remove abrasion force and other.

        4, electrical processing

         application electrical process processing mold 时, electrical electrical density very large, generate a large amount of hot, mold by processing temperature degree high 达10000℃ left right, due to temperature degree high, hot effect/influence 区 金 versus 组织必 will 发生变化, mold table/sheet due to high temperature 而发生熔化, rear cold, very fast solid, formed again solid 层. in micro lower can to, again solid 层呈白亮 color, internal has relatively more micro cracks. is long mold lifespan can using/adopting below/following measures: adjustment electrical processing parameters use electrical understanding method or machine abrasion method abrasion electrical processing rear surface, remove 异常层 in 白亮层, especially is need remove micro cracks. in electrical processing rear one-time low temperature 回火, make 异常层 stability 化, retardant micro cracks expand 展.

         according to upper in methods can shrink short development cycle and has anti mold manufacturing defect, improve/increase mold manufacturing quality, reduce production cost.