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众所周知,刀具在切削过程中将产生切削热,它可以传入刀具、切屑和工件中,并使它们温度升高,引起工件热变形,加速刀具的磨损.因此,在刀具设计时,对带有起定位作用的引导部分均设计有冷却液油槽,以便使切削部位散热降温.我厂设计的刀具,冷却液油槽形状如图1所示,但在使用中发现冷却效果不理想.据分析和实验,建议将冷却液槽改进为图2所示的形状.它与图1所示形状相比较,具有以下优点:(1)冷却液通道面积大,在同样的油压下,冷却液流入多,在切削面上冷却效果好.(2)油槽设计为与切削刃旋向相反的螺旋形状,使刀具在旋转的过程中,冷却润滑液有向切削表面压人的趋势.(3)加工不同的材料时,由于产生的切削热不同,可以选用不同角度的螺旋角,以改变冷却液的压力.螺旋角越大,油向下流出的压力越
As we all know, cutting tool in the cutting process will produce cutting heat, it can be introduced into the tool, chip and workpiece, and make them temperature, causing the workpiece thermal deformation, accelerated tool wear.Therefore, in the tool design, Starting from the positioning of the pilot part of the design are coolant tank, in order to make the cutting part of the cooling. I designed cutter, coolant tank shape shown in Figure 1, but in use found in the cooling effect is not ideal.According to the analysis and experiment , It is recommended that the coolant tank be modified to the one shown in Figure 2. This compares to the one shown in Figure 1 and has the following advantages: (1) Large coolant passage area, with the same hydraulic pressure, The cooling effect on the cutting surface is good. (2) The design of the oil groove is the spiral shape opposite to the rotation direction of the cutting edge so as to cool down the directed cutting surface of the lubricating liquid during the rotation of the tool. (3) Material, due to different cutting heat, you can choose different angles of the helix angle, in order to change the coolant pressure. Helix angle is greater, the oil out of the downward pressure