SJT 10628-1995 塑料件尺寸公差复习进程.doc

《SJT 10628-1995 塑料件尺寸公差复习进程.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、海普制盖《设计规范手册》页码：3－21主题塑件尺寸公差关于塑料件的尺寸公差可参照中华人民共和国电子行业标准SJ/T10628-1995。1.公差等级的选用：标准SJ/T10628-1995将塑件分为1、2、3、4、5、6、7、8、9和10，总共10个公差等级。每种塑料可选其中三个等级，即高精度、一般精度和低精度。公差等级的选用可参照下表实行。(仅列出海普制盖所常用的材料)材料相应的公差等级代号名称高精度一般精度低精度ABS丙烯腈-丁二烯-苯乙烯共聚物345AS丙烯腈-苯乙烯共聚物MBS甲基丙烯酸甲酯-丁二烯-苯乙

2、烯共聚物PS聚苯乙烯PC聚碳酸酯LDPE低密度聚乙烯678LLDPE线性低密度聚乙烯HDPE高密度聚乙烯8910PP聚丙烯备注：1.1、2级为精密级，只有在特殊条件下才采用。2.塑料包装行业不属于精密注塑行业，选一般精度即可。2.公差数值表：(单位为mm)基本尺寸公差等级12345678910公差数值-30.020.030.040.060.080.120.160.240.320.48>3-60.030.040.050.070.080.140.180.280.360.56>6-100.030.040.060.080

3、.100.160.200.320.400.64>10-140.030.050.060.090.120.180.220.360.440.72>14-180.040.050.070.100.120.200.240.400.480.80>18-240.040.060.080.110.140.220.280.440.560.88>24-300.050.060.090.120.160.240.320.480.640.96>30-400.050.070.100.130.180.260.360.520.721.0>40-500

4、.060.080.110.140.200.280.400.560.801.23.未注公差：尺寸未注公差可按公差数值表中规定的7-10级公差选用，一般选7级，将作为默认值。编制审核批准归档时态练习1.I(go)toschoolbybuseveryday.2.He(go)forawalkonSundays.3.SuYang(go)toafarmwithherparentslastweekend.4.Let’s(go)and(see).5.Whatareyou(go)todotomorrow?I’m(go)to(hav

5、e)apicnic.6.You(have)astoveandshe(have)atin-opener.7.Whattimedoyou(have)breakfast?I(have)breakfastataquarterpastseven.8.Whatdoyou(have)?They(have)ablanket.9.Whatareyoudoing?I’m(have)anEnglishlesson.10.I(have)agoodtimeyesterday.11.Whatareyougoingtodotomorrow?I

6、’mgoingto(have)apicnic.12.Whatdoyou(like)?I(like)(duck).13.Whatdoesshe(like)?She(like)(take)photos.14.Doeshelike(plant)flowers?15.I(watch)TVathomelastSunday.16.Myfather(read)anewspapernow.17.It(be)theNationalDayholidaylastweek.18.Iusually(do)myhomeworkatseven

7、o’clock.19.There________(be)manymonkeysinthemountain.20.There_________(be)abeautifulgardeninourschool.21.There_________(be)somewaterintheglass.22.There__________(be)somebreadonthetable.23. _______(be)Tom___________(read)abooknow?24.Where________(be)yourfriend

8、syesterday?25.When_________(do)yourfatherusually_________(go)towork?26.Howold__________(be)youlastyear?