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二、立铣头“0”位误差引起的弊病立铣、万能铣、万能工具铣、平铣上使用的立铣头,均可根据加工需要,在垂直于水平面的±90°范围内,任意扳转角度。在一般情况下,当加工平面、沟槽或者镗孔时,立铣头都应处于“0”位,即立铣头主轴轴线垂直于工作台台面。就立铣而言,严格地讲,可回转立铣头都应有“0”位定位装置,以免去操作者校准“0”位之麻烦,及立铣头在承受较大切削力时,也能保持“0”位。但有些较为陈旧的立铣,其立铣头不一定有“0”位定位装置,至于如
Second, the milling head “0” bit error caused by the drawbacks End milling, universal milling, universal tool milling, milling the use of vertical milling head, can be processed according to needs, in the vertical plane perpendicular to the range of ± 90 °, any Turn angle. Under normal circumstances, when the machining plane, groove or boring, the milling head should be in the “0” bit, that vertical milling spindle axis perpendicular to the table top. In terms of milling, strictly speaking, the rotary milling head should have a “0” bit positioning device, so as to avoid the operator to calibrate the “0” bit of trouble, and milling head to withstand greater cutting force, but also Can hold “0” bit. However, some older milling machines may not necessarily have a “0” positioner for their vertical milling heads. For example,