浮动镗刀刀杆上的方孔精度要求很高。方孔上下两面与刀杆中心线平行度误差下大于0.01毫米,对中性误差不大于0.01毫米。方孔的加工以前是先在插床上插出方孔,再用锉刀修成。每个方孔要锉修8小时。我们通过革新,制造出拉刀和夹具,以镗出的圆孔为基准,用方孔拉刀进行拉削,只要15分钟就可以拉削成,提高了生产效率,减轻了体力劳动,方孔精度也提 Floating boring knife arbor on the accuracy of the square hole is very demanding. Square hole on both sides and the centerline parallel to the error greater than 0.01 mm, the neutral error of not more than 0.01 mm. Square hole processing is the first inserted in the slotted square hole, and then file repair. Each square hole to file repair 8 hours. We through the innovation, to create a broach and fixtures to boring of the hole as a benchmark, with a square hole broach broaching, as long as 15 minutes can be broached into, to improve production efficiency, reduce manual labor, square hole Accuracy is also mentioned