铝合金薄壁中空结构件重负荷铣削刀具寿命及刀具磨损研究

使用高速钢和硬质合金刀具,在机床转速n=2000-5000r/min、进给速度vf=1000mm/min、轴向切深ap=20mm、径向切宽aw=10-20mm的切削用量范围内对铝合金薄壁中空结构件重负荷铣削加工刀具寿命及刀具磨损进行研究。结果表明:M42高速钢刀具由于刀具磨损率高、刀具破损和粘结严重而不适合该结构件的重负荷铣削;非波刃粉末冶金高速钢和硬质合金刀具具有良好的适应性,但无刀尖圆弧半径的高速钢刀具易发生刀尖破损,涂层硬质合金刀具易发生涂层过早剥落;波刃粉末冶金高速钢刀具易于发生刀具严重粘结,只宜在较低的机床转速下进行重负荷铣削加工;机床转速和径向切宽对刀具寿命有显著影响。

Reasearch on Tool Life and Wear of Heavy Milling Aluminum Thin-walled Hollow Structural

High speed steel and carbide tools were selected to investigate the tool life and tool wear when heavy mill- ing aluminum thin - walled hollow structure. The cutting parameters were confined to spindle speed n = 2000 - 5000r/rain, feed speed vf = 1000mm/min, depth of cut ap = 20ram and width of cut aw = 10 - 20mm. The results showed that M42 high speed steel tools were not suit for the heavy mill due to the high tool wear rate, severe tool chipping and adhesive wear. The un - wave cutters of sintered high speed steel and carbide had good applicability except for the big edge chipping of the high speed steel and coating peeling of the carbide. The wave edge high speed steel tool only could be used under the lower spindle speed because the severe tool adherence was easy to take place. The spindle speed and width of cut were the signif- icant influence factors that affected the tool life.