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为有效提高高强钢筋生产效率和矫直质量,基于楔钳作用机理,提出一种多点作用辊式止转筋机构:两侧多辊对称压下,中间三辊具有曲率微调功能,针对不同直径的高强钢筋,形成匹配的大变形曲率,并处于楔钳夹持状态,保证后续矫直过程的止转筋。基于ANSYS/LS-DYNA对止转筋机构工作过程进行有限元模拟,并对钢筋转动角度随时间变化图、接触应力状态及其变形图进行了探究阐释。结果表明:在保证高强钢筋表面接触强度的条件下,该机构能够实现高强钢筋矫直过程止转筋,从而可有效提高矫直精度。
In order to effectively improve the production efficiency and straightening quality of high strength steel bar, a multi-point roller antiglare mechanism is proposed based on the mechanism of the wedge forceps: symmetrical reduction of multi-rollers on both sides, middle three rollers with curvature trimming function, Of the high-strength steel to form a large deformation of the curvature of the match, and in the wedge clamp state, to ensure the follow-up of the straightening process of the tendon. Based on ANSYS / LS-DYNA, the working process of the anti-rotation bar was simulated by finite element method, and the rotating angle of the bar was analyzed with time, the contact stress state and its deformation diagram were explained and explained. The results show that under the condition of ensuring the contact strength of the high strength steel bar, the mechanism can achieve the stop of high strength steel bar straightening process and thus can effectively improve the straightening precision.