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改进后的芯棒外径尺寸减少0.6mm,并在芯棒外表面(径向)安装互成 90°的两个ф 2.5×5mm的硬质合金触点,构成两点接触式支承,可避免工件定位表面的划伤和磨损。附图2幅。
The improved outer diameter of the mandrel is reduced by 0.6mm and two ф 2.5 × 5mm carbide contacts are installed on the outer surface of the mandrel (radial) at 90 ° to form a two-point contact support, which can be avoided Scratches and wear on the workpiece positioning surface. Figure 2 Photo.