Monday, May 6, 2024
有一游杆卡尺,主尺每格为1mm,副尺刻线总长为49mm并均匀分50格,则此卡尺读数的准确度为()mmA、1mmB、0.05mmC、0.02mm...
Monday, May 6, 2024
Wednesday, September 6, 2023
锉削可以加工光整平面、曲面、内圆、深槽和各种形状复杂表面。...
Saturday, April 20, 2024
Wednesday, February 21, 2024
攻螺纹时底孔直径()内螺纹小径。A、小于B、等于C、大于D、等于或小于...
Saturday, December 30, 2023
Saturday, October 21, 2023
锪孔及锪平面有锪()、锪圆柱形沉头孔和锪孔的上下端平面三种形式。A、深孔B、方孔C、锪锥形沉头孔D、螺纹孔...
Saturday, October 15, 2022
Wednesday, April 17, 2024
Saturday, October 21, 2023
Saturday, December 30, 2023
Saturday, December 30, 2023
钻相连式平底双联孔可先用短钻头钻完大孔然后再钻小孔,最后()大孔底面。A、锪平B、铣平C、钻平D、铰平...
Friday, September 8, 2023
划线找正钻孔能达到的孔径精度一般为±0.25~0.5。...
Thursday, December 7, 2023
铰孔时铰刀反转会使塞在刀具后面与孔壁之间的切屑破坏已加工孔表面,...
Sunday, September 11, 2022
读零件图时先明确三个方向的尺寸基准,然后找出各组成部分的定型尺寸、定位尺寸和零件的整体尺寸。...
Thursday, December 7, 2023
切削量采用锥形分配的丝锥。如头锥在工作过程中折断,则可将二锥或三锥的切削部分磨得 长一些,就可作头使用。...
Monday, October 9, 2023
Friday, September 8, 2023
为防止反车退出丝锥损坏螺纹,机动攻通孔螺纹时,丝锥的()不能全部...
Tuesday, September 13, 2022
Tuesday, September 13, 2022