JBT 3943.2-1999 金刚石拉丝模

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1、JB/T3943.2-1999前言本标准是对JB3944-85《金刚石拉丝模具》的修订。本标准自实施之日起代替JB3944-85,本标准由全国电线电缆标准化技术委员会提出并归口.本标准起草单位:上海拉丝模厂等.本标准主要起草人:王筱英。中华人民共和国机械行业标准JB/T3943.2-1999金刚石拉丝模代替JB3944-85Diamonddiesforwiredrawing1范围本标准规定了金钢石拉丝模的技术要求、试验方法、检验规则和包装、标志等。本标准适用于拉制金属线材的金刚石拉丝模。2引用标准下列标准所包含的条文，通

2、过在本标准中引用而构成为本标准的条文。在标准出版时，所示版本均为有效。所有标准都会被修订，使用本标准的各方应探讨使用下列标准最新版本的可能性。JC220-1979夭然金刚石3符号、代号及产品表示方法3.1符号、代号3.1.1模具材质及拉制材料代号金刚石模具····“”·“·”·“····”···”······“············································，.···············⋯⋯MJT拉制硬性材料·····················”··········”·”

3、·”··，··················································，··⋯⋯Y拉制软性材料”··”···················“·········”·········”·······························”·············⋯⋯R3.12组成部分尺寸代号定径区外径·············““·“·········”······”·······”·············································

4、·····⋯⋯d:模套外径·········“·······················”·”····”·····················”·····································⋯⋯d,拉制角····”·”··”····“···············································”····················，··，············⋯⋯2a模芯高度·”···”······························

5、·······“··········”·············································⋯⋯h:模套高度”.............................................................................................................卜3压缩区高度·.........................................................................

6、............................·一12定径区高度·················“·······““·“····“·“·······“·“··“···“····································一1,3.2产品表示方法产品用型号、定径区直径和模套外径表示。例如:拉制钨丝的金刚石拉丝模，定径区直径d:为。.02mm,模套外径d:为16mm，表示为:MJTY0.02/164技术要求4.1材料4.1.1模芯4.1.1.1金刚石应符合JC220的规定。4.1.1.2金刚石

7、加工前的重量及加工后的高度应符合表1的规定。国家机械工业局1999-08-0‘批准2000-01-01实施45dB/T3943.2-1999表1定径IK直径d,金刚石加工前重t金刚石加工后高度h:不小于nl目,Ctn1幻1《0.40.10^-0.150.90.041^-0.1000.10^-0.151.00.101-0.2000.16^-0.201.20.201^-0.3000.21-0.301.40.301^-0.4000.31^-0.401.60.401^-0.5000.41^-0.551.80.501^-0.600

8、0.56--0.702.00.601^-0.8000.71^-0.852.30.801^-1.0000.86--1.002.51.001^-1.2001.01^-1.252.74.1.2模套模套材料应为硬度不低于HB75并在碱性溶液内不易腐蚀的金属。4.2模芯4.2.1模孔形状如图1，各区域应以光滑圆弧连接。d,>0