气缸体弹簧凹座,采用锪刀加工。因其加工部位距离缸体上端较深(约310毫米),且空间窄小,又由于导管底孔直径(φ16.7毫米)小(见图1)因此必须采用前端有导向柄的细而长的刀杆。过去,采用的导向柄是圆柱形的,由于铸造余量较大而导致刀杆弯曲,致使导向柄将已加工好的导管底孔划伤和划大,造成废品。近几年来,每年累计缸体废品仅此一项,即达几百个。为此,我们将刀具导向柄部分由圆柱形改成二段圆锥形(图2)。改进后,导向柄 Cylinder body spring recess, trowel processing. Because of its machining parts from the upper cylinder deep (about 310 mm), and the space is narrow, and because the diameter of the bottom hole (φ16.7 mm) small (see Figure 1) Therefore, the front has a guide handle thin and long Arbor. In the past, the guide stems used were cylindrical and the arbor was bent due to the large casting allowance, resulting in the guide shank scratching and scribing the finished bottom hole of the pipe, resulting in waste. In recent years, the cumulative total of cylinder waste each of this one, that up to hundreds. To this end, we will be part of the tool guide from cylindrical to two cones (Figure 2). After the improvement, the guide handle