一、问题的提出在手用丝锥国家标准GB3464—83中未对丝锥容屑槽的形状和槽形角提出明确的要求,这样制造厂方可在保证丝锥具有良好的切削性能和容屑槽连接圆滑的前提下有更多的设计和工艺上的机动性。为了制造方便,必须提供具体的参考数据。以M10为例,通常取前角γ=10°±2°,刃背宽度F=4.1~(-0.40),锥心直径d=4~(-4),容屑槽螺旋角ω=46～47°,槽数z=3,但在实际加工容屑槽的过程中,经常 First, the question raised In the national standard hand tap taps in the shape of the chip pockets and not groove taps put forward a clear requirement, so that the manufacturer can ensure the tap has good cutting performance and chip trough connection Sleek under the premise of more design and process flexibility. For the sake of convenience, we must provide specific reference data. Take M10 as an example, usually take the rake angle γ = 10 ° ± 2 °, the blade back width F = 4.1 ~ (-0.40), the cone heart diameter d = 4 ~ (-4) 47 °, the number of slots z = 3, but in the actual process of chip pockets, often