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该刀具与工件之间摩擦阻力大、相对运动速度高,因而产生大量的摩擦热,使铝管与刀具接触处温度急剧上升,塑性增大,此时刀具挤压力迫使工件局部变形而封口。铝管封口后内端面稍呈凸形(见图1)。其封口端面最薄处尺寸与铝管壁厚相同,且因金属未达到熔化温度,封口后端面材料的机械性能变化较小,能承受较大压力。铝管采取封口工艺后,大大简化了零件的制作,节省大量的原材料和加工时间. 刀具特点刀具材料采用高速钢。主要部分刀刃为圆弧刃,对金属不起切削作用,故称无切削刃。刀刃按功用分四部分(见图2): (1)切断部分。刀刃尖部突出,副偏角1°～2°,
The friction resistance between the tool and the workpiece, the relative speed of movement, resulting in a large amount of frictional heat, so that the aluminum tube and the tool at the contact temperature rose sharply, plasticity increases, then squeeze the workpiece to force the partial deformation of the seal. After the aluminum tube seal slightly convex inner surface (see Figure 1). Its sealing end surface of the thinnest at the same size and aluminum tube wall thickness, and because the metal does not reach the melting temperature, sealing the end face of the mechanical properties of small changes in materials, can withstand greater pressure. Aluminum pipe to take the sealing process, greatly simplifying the production of parts, saving a lot of raw materials and processing time. Tool Features Tool material using high-speed steel. The main part of the blade for the arc edge, the metal can not afford to cut, it said no cutting edge. Utility knife divided into four parts (see Figure 2): (1) cut off part. Blade tip prominent, Deputy declination 1 ° ~ 2 °,