粉锻连杆抛丸运动仿真分析与优化

Simulation analysis and optimization of shot blasting for powder forged connecting rod

抛丸强化工艺能提高粉锻连杆的疲劳强度和使用寿命。运用PROE建立抛丸器实体模型,采用离散单元法和EDEM仿真分析不同分丸轮转速、弹丸直径和抛丸角度下的抛丸运动规律,得出不同的工艺参数组合。结合正交试验法对工艺参数进行优化并得到最优方案。对优化方案进行抛丸强度、表面覆盖率的试验验证,确定连续稳定的抛丸强化工艺方案为分丸轮转速为2 800 r/min,抛丸角度为10°,弹丸直径为0.7 mm,可有效提高抛丸强化质量和效率。

Shot blasting reinforcement technology can improve the fatigue strength and service life of the powder forged connecting rod. Using PROE to establish the solid model of the shot blasting machine,the discrete element method and EDEM simulation were used to analyze the shot blasting motion law under various sub-pill rotational speed,projectile diameter and blasting angle,thus different combination of process parameters were achieved.Combining the orthogonal test method,the process parameters were optimized and the optimal scheme was verified through the test of shot blasting strength and surface coverage. The continuous and steady shot blasting reinforcement technology is determined as the sub-pill rotational speed of 2 800 r/min,the shot blasting angle of 10°and the projectile diameter of 0.7 mm,the quality and efficiency of shot blasting are effectively improved.