问题:PC塑料制品在成型过程中会产生哪些缺陷?哪些对模具设计有要求?...
Tuesday, September 13, 2022
问题:数控车床的种类较多,一般均由车床主体、数控装置和()构成。先进的...
Tuesday, September 13, 2022
问题:对于一般壁厚的压铸件,内浇口厚度通常取为壁厚的()倍左右。...
Tuesday, September 13, 2022
问题:细长轴车削有何特点?细长轴车削应采取哪些工艺措施?...
Tuesday, September 13, 2022
问题:注射模上设计冷料穴是为了()A、储存塑料熔体的前锋冷料B、使塑料熔体塑化均匀C、保证塑料制件的尺寸、精度D、保护模具...
Monday, November 13, 2023
问题:注塑模主要由()、浇注系统和结构零件三大部分组成。...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
问题:若U形件标注的是宽度方向的内形尺寸,则凸模的基本尺寸应()...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
问题:普通冲裁件的断面可一般有四个特征,即:圆角带、光亮带、断裂带和。...
Tuesday, September 13, 2022
问题:加工斜线OA,设起点O在切割坐标原点,终点A的坐标为Xe=17m...
Tuesday, September 13, 2022
问题:当塑件的外观要求很高,不允许有任何痕迹时,注塑模浇口形式应采用(...
Tuesday, September 13, 2022
问题:1/50mm游标卡尺的两测量爪合并时,付尺上50格与主尺上()mm对齐。A、49B、39C、59...
Tuesday, November 15, 2022
问题:零件设计图纸上用来表示各表面相互位置所依据的那些点、线、面是()A、工序基准B、装配基准C、工艺基准D、设计基准...
Tuesday, January 10, 2023
Tuesday, September 13, 2022
Tuesday, September 13, 2022