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七十年代末,英国、美国、苏联、西德等国先后设计成功一系列新颖的塑料切削刀具,下面介绍其中的六种。一、铣刀图1所示为美国Lear Siegler公司研制成功,用以铣削纤维塑料用的铣刀。这种铣刀包括工作部分1和柄部2。螺旋槽3和螺旋角60°的切削刃4占工作部分的一半;而另一半则磨出方向相反、角度相同的螺旋槽7和切削刃8。刀具端部可磨成类似钻头型式,有横刃5与切削刃6,也可磨成平面型式。切削刃4与8、螺旋槽3与7大体在工怍部分的
The late seventies, Britain, the United States, the Soviet Union, West Germany and other countries have successfully designed a series of innovative plastic cutting tools, the following describes six of them. First, the cutter Figure 1 shows the successful development of the United States Lear Siegler company, used to mill fiber plastic cutter. This milling cutter comprises a working part 1 and a shank 2. The helical groove 3 and the helical angle 60 ° of the cutting edge 4 occupy half of the working portion; and the other half grind out the helical groove 7 and the cutting edge 8 of the same direction and the same angle. The end of the tool can be ground into a drill-like pattern with chisel edge 5 and cutting edge 6, which can also be ground flat. Cutting edges 4 and 8, helical grooves 3 and 7 are generally in the working section