论文部分内容阅读
我厂生产的6105Q型柴油机前、后气缸罩,材料为ZL105铸造铝硅合金,工件φ16H8孔的最终加工采用铰工,表面粗糙度为Ra5～10μm,在Z3040型摇臂钻床上加工。工件用夹具定位夹紧,先钻孔至φ15mm,再扩孔至φ15.8mm,最终铰孔至φ16H8,铰刀材料采用W18Cr4V高速钢,用柴油作切削液,原采用的铰削用量是,铰刀(主轴)转速为250r/min,进刀量为0.5mm/r,铰削余量为0.2mm(直径余量),铰刀寿命平均为40分钟。由于材料的粘接影响。工件内孔表面粗糙度常达不到Ra5～10μm,孔径也经常铰大,特别是当材料的化学成分、含杂质量、铸造工艺、热处理等因素导致材料塑性增大、粘接严重时,粘附在铰刀前刀面上的切屑阻塞在铰刀容屑槽内,将
The 6105Q diesel engine front and rear cylinder covers produced by our factory are made of ZL105 cast Al-Si alloy. The final processing of the φ16H8 hole of the work piece is hinged. The surface roughness is Ra5 ~ 10μm, and it is processed on the Z3040 radial rocker drilling machine. The workpiece is clamped and clamped by a clamp. The hole is first drilled to φ15mm, re-expanded to φ15.8mm and finally reamed to φ16H8. The reamer is made of W18Cr4V high-speed steel with diesel oil as cutting fluid. The original reaming amount is Knife (spindle) speed of 250r / min, feed rate of 0.5mm / r, reaming allowance of 0.2mm (diameter margin), reamer life average of 40 minutes. Due to the bonding of the material. The surface roughness of the hole in the workpiece often can not reach Ra5 ~ 10μm, the aperture is often reamed, especially when the chemical composition of the material, impurity content, casting process, heat treatment and other factors lead to material plasticity increases, the adhesion is severe, the viscosity The chip attached to the rake face of the reamer clogs in the chip pocket of the reamer