短钢棒矫直机矫直辊系受力分析与稳定性研究

发布时间：2018-08-29 16:46

【摘要】：本文设计的新型全自动短钢棒矫直机,主要是对直径为Ф4~Ф12mm、长度为150mm的合金工具钢进行无划伤矫直。本文将短钢棒矫直机的设计分为5个主要部分即上料机构、上辊系机构、下辊系机构、换向传动机构以及动力系统进行设计。基于新型全自动短钢棒矫直机,主要用于对处于圆柱棒料状态下的钻头、圆柱铣刀等进行精密矫直,进一步提高了产品的直线度和质量。以旋转反弯矫直原理为出发点,建立矫直辊系作为短钢棒两端支撑并带动短钢棒旋转,通过压辊压下量和轴向位置的改变实现矫直。基于多辊矫直机的辊系结构,建立十五辊矫直辊系系统包括上下矫直辊,支撑辊,上下主动辊、压辊及其力学模型。利用Matlab编程,采用迭代计算方法计算出辊系工作过程各辊之间的接触力并计算出矫直辊系的传动力矩。通过辊系受到的合外力和合外力矩来定义辊系稳定性的条件。采用三维工程设计软件Solidworks对辊系进行结构设计和几何模型的建立。对几何模型进行简化后导入Adams进行动力学仿真,采用自动柔性化功能模块将矫直辊系柔性化。研究十五辊矫直辊系各辊间接触点的受力情况,得到矫直辊系辊间接触力的仿真结果,并将理论分析与仿真结果进行对比分析。为了更精确、更深入的研究辊系的稳定性,对十五辊矫直辊系中各辊的角速度和力矩进行测量并对仿真结果进行分析。通过研究矫直辊系的受力、转速和力矩来验证十五辊矫直辊系的稳定性。
[Abstract]:A new type of automatic short bar straightening machine designed in this paper is mainly used to straighten alloy tool steel with diameter of 4 ~ 12 mm and length of 150mm without scratch. In this paper, the design of short steel bar straightening machine is divided into five main parts: feeding mechanism, upper roller mechanism, lower roll mechanism, reversing transmission mechanism and power system. Based on a new type of automatic straightening machine for short steel bar, it is mainly used to straighten the drill bit and cylindrical milling cutter in the condition of cylindrical rod material, thus further improving the straightness and quality of the product. Based on the principle of reverse bending straightening, the straightening roll system was established as the support of both ends of the short steel bar and the rotation of the short steel bar. The straightening was realized by changing the reduction of the roll and the change of the axial position. Based on the roll system structure of multi-roll straightening machine, a 15-roll straightening roll system is established, which includes upper and lower straightening roll, support roll, upper and lower active roll, pressing roll and its mechanical model. By using Matlab programming, the contact force between the rollers and the driving moment of the straightening roll system are calculated by iterative calculation method. The condition of roll system stability is defined by the external force and moment of the roll system. The three-dimensional engineering design software Solidworks is used to design the structure and build the geometric model of the roll system. The geometric model was simplified and introduced into Adams for dynamic simulation. The straightening roll system was flexible by the automatic flexible function module. In this paper, the stress on the contact point of each roller in the 15 roll straightening system is studied, and the simulation results of the contact force between the straightening roll and the straightening roll are obtained, and the theoretical analysis and the simulation result are compared and analyzed. In order to study the stability of the roll system more accurately and deeply, the angular velocity and torque of each roll in the 15-roll straightening roll system were measured and the simulation results were analyzed. The stability of the 15-roll straightening roll system is verified by studying the force, rotational speed and torque of the straightening roll system.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG333.23

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