论文部分内容阅读
为了避免切削加工的摩擦片常出现的齿根部断裂和齿面易磨损的现象,采用了先进的精冲工艺加工摩擦片。通过观察精冲摩擦片内齿心部和齿根部位金相显微组织,测量内齿齿顶、齿根部位从边缘到内部的取点硬度,检测内齿的齿根部位的残余应力,探究了摩擦片精冲件的内齿显微力学行为和性能。结果表明:精冲摩擦片的内齿部位塑性变形程度很大,齿面附近组织形成一条条致密的金属流线,而且越靠近齿根部边缘部分组织越致密;齿顶、齿根部位由于塑性变形程度很大,加工硬化程度也很大,且表面和齿顶较大;在齿根表面存在较大的残余压应力。精冲加工后摩擦片的力学行为显示摩擦片的内齿部位有很强的耐磨性、抗疲劳强度和抗冲击性,增大了摩擦片的使用寿命。
In order to avoid cutting the friction plate often appear tooth root fracture and tooth surface easy to wear phenomenon, the use of advanced fine red processing friction plate. By observing the metallographic microstructure of the inner tooth center and the tooth root of the fine grinding friction plate, the hardness of the tooth top and the root from the edge to the inside was measured and the residual stress at the tooth root of the internal tooth was measured. The friction Internal tooth micromechanical behavior and performance of sheet fine blanking parts. The results show that the internal tooth parts of fine rubbing friction plates have a great degree of plastic deformation and a dense stream of metal flows near the tooth flanks, and the denser the tissue closer to the edge of the tooth root. Due to the plastic deformation A great degree of work hardening is also great, and the surface and the tooth tip larger; there is a large residual compressive stress in the tooth root surface. The mechanical behaviors of the friction plates after the fine blanking process show that the inner toothed parts of the friction plates have strong abrasion resistance, anti-fatigue strength and impact resistance, which increases the service life of the friction plates.