It was pointed out that,in order to guarantee the quality of manually made lost foam patterns,attentions should be paid to:(a)Density of the foam board should be more than 16 g / dm3;(b)Surface defects of lost foam patterns should be remedied in proper time.
详细介绍了消失模的手工加工成型方法和粘结剂的选用方法。
Electronic handwork skill training is very important and necessary for electronic information majors in higher vocational and technical college.
电子手工技能培训对于高职电子信息专业来说,是十分重要和必要的。
Two kinds of welding methods:strength low-matched with automatic welding and strength over-matched with manual welding,were applied to the ultra-fine micro-alloy steel without pre-& post-heating treatment.
对超细组织微合金结构钢在不进行焊前焊后热处理的条件下,分别采用低强匹配自动焊和高强匹配常规手工焊方法进行焊接试验。
According to the introduction of the manufacture process feature of flux-cored wires and the good performances exhibited by the deposit metal,the current questions on the popularization and application of flux-cored wires were analyzed,as well as the applied methods of flux-cored wires for manual welding.
通过对药芯焊丝制造工艺特点及其熔敷金属所表现出的良好性能的介绍,分析了当前药芯焊丝推广应用所遇到的问题,提出了将药芯焊丝用于手工焊接的方法,并指出了推广应用的几个关键问题。
