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塑压接触面上之摩擦力,在一定时间作用于一定曲线族之切线方向,此曲线族称为“摩擦线”,其理论意义为:摩擦线本身为塑压表面流动之方向规律;其实际意义为:加工压力之科学计算有赖于摩擦线。在连续塑性变形过程中,接触面上质点之流动轨迹称为“长程滑线”,在塑压中一形状变为另一形状,长程滑线为始末形状间之表面变化规律。本支为一系列研究(例如[1]至[3])之续,目的及结果有三: (1)证明前文中摩擦线、等压线与压力布三个微分方程不受摩擦物理方程之约束; (2)提出椭圆板摩擦线族之另一解; (3)开拓出决定直观摩擦线的方法,定出塑泥及铅椭圆板之一系列摩擦线族,并对理论与实验结果作了比较讨论。金属摩擦线研究在进行中。北京钢铁学院的温金珂先生在本文前一作者指导下作过一长方板的摩擦线,她的结果将在长方板摩擦线系统化研究中一并发表。
The friction force on the plastic pressure contact surface acts on the tangential direction of a certain curve family at a certain time. This curve family is called “friction line”, and its theoretical meaning is that the friction line itself is the regular direction of the plastic pressure surface flow; Meaning: The scientific calculation of processing pressure depends on the friction line. In the continuous plastic deformation process, the particle trajectory on the contact surface is called “long-distance slide line”, and one shape changes to another shape in plasticizing. The long-distance slide line changes the surface shape between the initial and final shapes. This series of studies (for example, [1] to [3]) continued, the purpose and the results of three: (1) to prove that the friction line before, pressure and pressure cloth three differential equations are not bound by the friction physics equation ; (2) Propose another solution to the friction line family of elliptic plates; (3) Open up the method of determining the visual friction line, define a series of friction lines of plasticine and lead oval plates, and make the theoretical and experimental results More discussion. Metal friction line research is underway. Mr. Wen Jinke from Beijing Institute of Iron and Steel, under the direction of the former author of this paper, made the rubbing line of a rectangular parallelepiped. Her results will be published in the systematic study of the rubbing of rectangular parallels.