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在金属材料冷拉拔加工过程中实现流体动力润滑可以有效的降低摩擦力、提高金属材料的变形程度、产品的质量和模具的使用寿命。实现强迫润滑的主要影响因素是:接触压力、润滑剂的黏度、接触表面的温度和相对滑动的速度、以及锥管的长度和斜度等。并通过试验证明:润滑剂出口端内部的压力与润滑剂薄膜的厚度与润滑剂的黏度η、坯料的运动速度u1、增压管的长度B2、斜度tanα成正比,而与进口端的间隙ε1及出口端间隙ξ22成反比。
In the metal material during the cold drawing process to achieve hydrodynamic lubrication can effectively reduce the friction and improve the degree of deformation of metal materials, product quality and mold life. The main factors to achieve forced lubrication are: contact pressure, lubricant viscosity, contact surface temperature and relative sliding speed, as well as the length and slope of the cone and so on. It is proved through experiments that the pressure inside the lubricant outlet and the thickness of the lubricant film are proportional to the viscosity η of the lubricant, the moving velocity u1 of the blank, the length B2 of the pressurizing tube and the inclination tanα, and the gap ε1 And exit port clearance ξ22 is inversely proportional.