低频振动钢筋磨切系统试验研究

Experimental Study on Steel Bar Grinding and Cutting System of Low Frequency Vibrating

针对钢筋类棒料进行快速切断作业的需要,搭建了低频振动辅助磨削切割样机,通过样机试验,研究了该振动磨切系统的固有特性,确定了系统稳定工作时的主要参数(进给力和激振频率)的选择范围。进一步的磨切试验表明,在一定范围内,低频振动可以减小完成切断操作所需要的最小进给力,提高切削效率并降低温升,有效控制切割过程对人体组织的热损伤。而振动的引入也使切割过程中的平均切削力显著减小,从而使钢筋与周围组织之间的相对位移量减小,有利于降低甚至避免周围软组织因失压而出血的危险。

In order to meet the need of rapid cutting off of steel bar,a prototype of low frequency vibration assisted grinding is built in the lab.By the prototype test,the inherent characteristics of the vibration grinding system are studied,and main optimized parameters(feed force and excitation frequency)which can keep the system working stably were determined.The further grinding and cutting test shows that in a certain range,the low frequency vibration can reduce the minimum feed force needed to complete the cutting operation,improve the cutting efficiency and reduce the temperature rising,and effectively control the thermal damage of the cutting process to the human tissue.The introduction of vibration also reduces the average cutting force in the cutting process,so that the relative displacement between the steel bar and the surrounding tissue of the survivor is reduced,which is beneficial to reduce or even avoid the risk of bleeding from the surrounding soft tissue due to pressure loss.