基于EDEM的玻璃纤维振动给料仿真分析

Simulation Analysis of Glass Fiber Vibration Feeding Based on EDEM

针对新型玻璃纤维增强材料生产中的喂料工艺难点,率先提出并理论验证了振动送料这一简单方法实际应用的可行性。首先分析了振动给料机的运动特性,确定了输送玻璃纤维料所需要的运动形式,即抛掷运动和正向滑移,并推导出其产生的条件式,再利用条件式确定了4组振动参数。然后应用离散单元法仿真软件EDEM建立仿真模型,设置相应参数模拟了4组参数下的纤维振动给料情况,仿真结果验证了运动条件式的正确性,同时分析振动给料机末端区域仿真数据可知机械指数合适时,振动给料的输送方式能实现玻璃纤维匀速松散地投喂,并且机械指数相同时振幅对给料速度影响显著,可通过改变振幅来实现喂料速度定量调节。

Aiming at the difficulty of fiber feeding in the production of glass-fiber-reinforced thermoplastics, this work proposed a simple vibrating feeding method and verified its feasibility in practical applications. The motion characteristics of vibrating feeder were analyzed, and the form of motion required for the transportation of glass fiber was determined as the throwing motion and forward slip. The associated conditional formula was derived and used to determine four sets of vibration parameters. A simulation model was established by a discrete unit method with the EDEM simulation software, and the corresponding parameters were set to simulate the fiber vibration feeding condition with four parameters. The simulation results verified the validity of the motion condition formula. Meanwhile, the simulation data for the vibrating feeder in the end region were analyzed. It was found that the vibration feeding method could realize uniform feeding of glass fiber at a constant speed with a suitable mechanical index, and the amplitude showed a significant influence on the velocity of vibration feeding. In this case, the feed rate can be quantitatively adjusted by changing the amplitude.