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1985年4月20日至26日在上海举办的国外和香港地区机械工具展览会上,HERTEL 公司展出了一种新的切削力自紧装配式切断刀。它除具有结构新颖、设计合理、装夹可靠等优点外,并可节约大量整体式切断刀的刀体钢材,现介绍如下。一、夹紧原理图1为利用切削力自紧装配式切断刀的结构。刀片1是预先加工好的,工作前可将它插入片状刀体2的刀槽中,利用它们上下两端的120°V 形支承面可使刀片在刀槽中定位,而片状刀体2又用其上下端的V 形支承面固定在弹性刀夹3的刀槽中。刀片在刀体槽中的固定则是通过切削时所产生的切削力来实现的。如图2所示,刀片在切削时将受到主切削力Fz 和径向力Fy 的作用。它们在主剖面内的合力为R,其作用角为ψ。由图中可知,
HERTEL exhibited a new cutting force self-assembly cutting knife at the International and Hong Kong Machine Tools Exhibition held in Shanghai on April 20-26, 1985. In addition to its advantages of novel structure, reasonable design, reliable clamping, etc., and can save a large number of integral cutter blade body steel, are described below. First, the clamping principle Figure 1 is the use of cutting force self-compact assembly-type cutting knife structure. The blade 1 is pre-machined, which can be inserted into the blade groove of the blade 2 before use, and the blades can be positioned in the blade groove by means of their 120 ° V-shaped bearing surfaces at the upper and lower ends, while the blade 2 With its upper and lower V-shaped bearing surface is fixed in the blade holder 3 flexible knife. The blade is fixed in the body slot by the cutting force generated by cutting to achieve. As shown in Fig. 2, the blade will be subjected to the primary cutting force Fz and the radial force Fy during cutting. Their combined force in the main section is R, and their interaction angle is ψ. As can be seen from the figure,