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我厂工具车间制造的端齿硬质合金铰刀(见图1),其加工工艺路线中最后几道磨削工艺为:粗磨外圆(φ46.2~(+0.05))、精磨后角、精磨前刃(0.10～0.15)、精磨外圆(φ46_(+0.012)~(+0.02))、精磨后角(6°～8°)。铰刀外圆尺寸为φ46_(+0.012)~(+0.02),公差为0.008mm。精磨外圆后,尺寸公差一般都能达到要求(测量工具为杠杆千分尺),而在精磨后角以后,却出现铰刃外圆尺寸减小的现象。理论上认为,只要存有刃带,外圆尺寸是不会发生变化的。
I plant the end of the tooth tool factory carbide reamers (see Figure 1), the process of the last few grinding process: coarse grinding cylindrical (φ46.2 ~ (+0.05)), after grinding (0.10 ~ 0.15), fine grinding cylindrical (φ46 _ (+0.012) ~ (+0.02)), fine grinding angle (6 ° ~ 8 °). Reamer cylindrical size φ46 _ (+0.012) ~ (+0.02), tolerance of 0.008mm. After grinding the outer circle, the dimensional tolerances can generally meet the requirements (measurement tools for the lever micrometer), but after the corner after the grinding, there is a reduction in the size of the reaming edge of the circular phenomenon. In theory, as long as the margin exists, the outer dimensions will not change.