圆锯片基体辊压适张残余应力分布特性

Distribution Characteristics of Residual Stress in Circular Saw Blade Matrix under Roll Tensioning

针对不同规格的圆锯片基体进行相应的辊压适张处理是提高圆锯片锯切质量的重要方式。为了研究圆锯片基体的辊压适张残余应力分布特性,对圆锯片基体进行辊压试验和残余应力测试试验,并通过辊压适张理论和有限元数值模拟方法获得辊压后圆锯片基体的残余应力分布特性。结果表明:辊压改善圆锯片径向应力分布的均匀性,辊压后径向应力最大值和最小值的差值较辊压前有所减小;辊压后圆锯片的稳定性提高,辊压适张切向残余应力沿半径方向呈“外正内负”的分布规律,锯片边缘产生的正切向应力能够抵消热应力带来的负面影响。试验结果对制锯企业根据不同规格、不同材料的圆锯片基体开展辊压工艺优化试验具有指导作用。

It is an important way to improve the sawing quality of circular saw blades to carry out the appropriate roll tensioning treatment for different specifications of circular saw blades matrix.In order to study the residual stress distribution characteristics of the circular saw blade matrix under rolling tension,the rolling test and residual stress test are conducted on the circular saw blade matrix,and the residual stress distribution of the circular saw blade matrix after rolling is obtained through rolling tension theory and finite element numerical simulation.The results show that rolling improves the uniformity of the radial stress distribution of the circular saw blade,and the difference between the maximum and minimum radial stresses after rolling is reduced compared with that before rolling.Rolling improves the stability of the circular saw blade.The tangential residual stress of rolling tensioning presents a positive outside and negative inside distribution law along the radius direction.The tangential stress generated at the edge of the saw blade can offset the negative impact of thermal stress.It has a guiding role for sawing enterprises to carry out rolling process optimization experiments according to different specifications and materials of circular saw blade matrix.