Research on Cooling Technology of Shredder Cutting Tool With Ultrasonic Vibration-Assisted Cutting
Research on Cooling Technology of Shredder Cutting Tool With Ultrasonic Vibration-Assisted Cutting
复制标题
DOI：
10.1109/access.2019.2941645
复制
发表时间：
2019
期刊：
影响因子：
3.9
通讯作者：
Pengfei Qian;Yang Liu;Shuhao Gu;Peng Xia;Zhenye Gu;Bing Zhang;Xiaolei Deng
中科院分区：
文献类型：
--
作者：
Pengfei Qian;Yang Liu;Shuhao Gu;Peng Xia;Zhenye Gu;Bing Zhang;Xiaolei Deng
为提高撕碎机刀具的使用寿命，在双轴卧式撕碎机刀具设计中引入了超声振动辅助切割和射流、喷雾冷却等新技术。对超声振动辅助切削技术进行了理论分析，结果表明，只有当切削速度小于振动速度时，才能产生减摩效果。因此，在转速为60 r/min的破碎机上进行振幅为25 μ m、频率为20 kHz的振动辅助切削时，摩擦力降低了52.5%，切削温度降低了10.5%。喷水冷却和喷雾冷却。采用Ansys-fluent软件，在拉格朗日模型的基础上对它们进行了数值模拟。仿真结果表明，水射流冷却可以实现较好的冷却效果，但当射流直径增大到4 mm左右时，冷却效果才有明显改善;另外，振动切削喷雾的冷却效果与无振动切削的喷雾冷却效果非常接近，且冷却剂消耗量少。因此，可以采用振动切削的喷雾冷却方式代替水射流冷却方式，以提高冷却液的利用率。与传统的切碎机切割相比，喷雾冷却振动切割的切割温度降低了65%。
To improve service life of shredder cutters, new technologies such as ultrasonic vibration-assisted cutting and cooling technology (jet and spray) are introduced into the design of the cutter for a two-axis horizontal shredder. Ultrasonic vibration-assisted cutting technology is theoretical analyzed, and result shows that the effect of friction reduction only happens when the speed of cutting is less than vibration speed. Therefore, the vibration-assisted cutting get a friction reduction of 52.5% and a cutting temperature reduction of 10.5% when the vibration-assisted cutting with an amplitude of $25~\mu \text{m}$ and a frequency of 20 kHz is performed on the shredder with the rotational speed of 60 r/min. Three cooling methods are proposed to lower the temperature of shredder tools such as air jet cooling, water jet cooling, and spray cooling. They are all simulated with Ansys-fluent software on the basis of the Lagrangian model. Simulation results show that water jet cooling can realize better cooling effect, whereas its cooling effect will not improve obviously until the jet diameter increases to around 4 mm. In addition, the cooling effect of the spray with vibration cutting which has less coolant consumption is very close to that of the water jet without vibration cutting. Therefore, the mode of spray cooling with vibration cutting can be used instead of the mode of water jet cooling for higher coolant utilization. By comparing with the traditional cutting of shredder, the spray cooling with vibration cutting has a cutting temperature reduction of 65%.