问答题
车削压力角为20°的蜗杆，图样上标注的齿厚及偏差为
【正确答案】已知α=20°、△s上=-0.22mm、△s下=-0.30mm
△M上=2.7475△s上=2.7475×(-0.22mm)
=-0.604mm
△M下=2.7475△s下=2.7475×(-0.30mm)
=-0.824mm
[答] 改用三针测量时的偏差为
△M上=2.7475△s上=2.7475×(-0.22mm)
=-0.604mm
△M下=2.7475△s下=2.7475×(-0.30mm)
=-0.824mm
[答] 改用三针测量时的偏差为
【答案解析】