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带内冷的车刀主要用在普通车床和立式车床上加工难加工钢,这种车刀的结构(图1)应用带散热片2的热管1,把切削部的热量引至车刀尾部散去,以提高刀具的冷却效率,并排除从外部浇注冷却液的必要。在自动换刀机床上采用这种车刀非常方便。热管可以做成单个零件形式(可互换的)也可做成在刀体内的孔道形式(内装式的),刀柄的最小截面为16×25mm,以便在里面分布热管。车刀的冷却方式如下:在坯件加工过程中,从切削区传入车刀的热量加热分布在切削元件下的热管端头,局部填充在真空密封热管内的液体(传热介质)被
The tool with internal cooling is mainly used for machining difficult-to-machine steel on ordinary lathes and vertical lathes. The structure of this turning tool (Figure 1) uses the heat pipe 1 with heat sink 2 to direct the heat of the cutting part to the tail of the turning tool Scattered to increase the tool cooling efficiency and eliminate the need to pour coolant from the outside. It is very convenient to use this turning tool on the automatic tool changing machine. The heat pipe can be made as a single part (interchangeable) or in the form of a bore (built-in) in the tool body, with a minimum cross-section of 16 x 25 mm for distributing the heat pipe inside. The cooling of the turning tool is as follows: During the blank machining, the heat transferred from the cutting zone to the turning tool heats the end of the heat pipe distributed under the cutting element. The liquid (heat transfer medium) partially filled in the vacuum sealed heat pipe is heated