我厂生产的万能銑床中,有带两种半圆槽的键(如图1),过去是在万能銑床上用了形槽銑刀分两次来銑,后来改用如图3的組合銑刀,将两个半圆槽一次銑出,提高了生产效率30%。加工的情形如图2,組合銑刀夹在銑床主軸上,并加装一个半圓支承,以免銑刀頸部(φ8处)折断。这半圓支承可用 I plant universal milling machine, there are two kinds of semi-circular groove keys (Figure 1), in the past is a universal milling machine with a groove cutter two times to milling, then switch to the combined cutter as shown in Figure 3 , The two semi-circular groove milling, improve production efficiency of 30%. Machining the situation shown in Figure 2, the combination of milling cutter folder in the spindle, and the installation of a semicircular support, to avoid milling cutter (φ8 Department) broken. This semi-circular bearing is available