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1内孔难加工性分析主起外筒是我国自主研发的大型水陆两用特种飞机起落架主要承力构件之一,该零件材料为超高强度钢30Cr Mn Si Ni2A,σb=1670±100MPa。零件总长2600mm,孔深2161mm,最小孔直径为150mm,最大孔直径为200mm;零件内孔为深长阶梯复杂内孔,长径比14.4,内孔多台阶和型面,中间孔小,尾部半盲孔直径大,工艺性差,对加工刀具的刚性有特殊
1 hole difficult to analyze the main from the outer cylinder is China’s independent research and development of large amphibious special landing gear one of the main bearing member, the parts material is ultra-high-strength steel 30Cr Mn Si Ni2A, σb = 1670 ± 100MPa. Parts total length 2600mm, hole depth 2161mm, the smallest hole diameter 150mm, the largest hole diameter 200mm; part of the hole for the deep ladder complex bore, aspect ratio 14.4, multi-step and the inner surface of the hole, the middle hole is small, the tail Semi-blind hole diameter, poor technology, the rigidity of the processing tool is special