Thursday, September 22, 2022
Thursday, September 22, 2022
Saturday, November 5, 2022
某40MnB钢主轴,要求整体有足够的韧性,表面要求有较高的硬度和耐磨性,采用何种热处理工艺可满足要求?简述理由....
Tuesday, September 20, 2022
Friday, September 16, 2022
Sunday, September 18, 2022
只要是用刀具移动指令编程,必须指定进给速度F,否则刀具就不会移动。...
Wednesday, September 21, 2022
火硬度不足和软点一类的质量问题,可在返修前进行一次退火、正火或高温回火以消除淬火应力,防止重新淬火时发生过量变形或开裂。...
Thursday, September 22, 2022
Friday, September 16, 2022
Sunday, September 18, 2022
在FANUC数控系统中,程序段N32 G92 X23.2 Z-23.0 F1.0可用于加工M24X2.0螺纹。...
Saturday, September 17, 2022
砂型铸造中常用的手工造型方法有()、()、()和活块造型等。...
Thursday, September 22, 2022
当脉冲放电能量相同时,热导率愈小的金属,电蚀量会降低。...
Thursday, September 22, 2022
Friday, September 16, 2022
Thursday, September 22, 2022
基准孔的上偏差大于零,基准轴的下偏差的绝对值等于其尺寸公差。...
Thursday, September 22, 2022
从减小伺服驱动系统的外形尺寸和提高可靠性的角度来看,采用直流伺服驱动比交流伺服驱动更合理。...
Thursday, September 22, 2022
进给量指工作或刀具每转一转时,两者沿进给方向的绝对位移。...
Tuesday, September 20, 2022
单选题数控机床进给系统采用齿轮传动副时,为了提高传动精度应该有消除()措施。A 齿轮轴向间隙B 齿顶间隙C 齿侧间隙D 齿根间隙...
Friday, March 17, 2023
Thursday, September 22, 2022