【作者】 王玉玲；

【导师】 孙军；

【作者基本信息】 沈阳建筑大学 ， 机械电子工程， 2011， 硕士

【摘要】 随着社会经济的稳步发展,科学技术的进步,工业生产技术水平也有显著的提高。在工业加工过程中,不仅要求在提高加工质量的同时提高加工效率,还要求减少加工工序、节约原材料、减少人工操作、减低生产成本、降低噪音等。在钢管连续生产过程中,在线高速切断设备是整个生产线中的关键设备之一,其性能的优劣将直接影响钢管的剪切质量和整条生产线的生产效率。通常所采用的管材切断方法存在许多问题,既影响加工质量又增加生产成本。本文将对影响飞剪机(钢管高速冲裁机构)剪切质量的因素进行分析,并通过对模拟结果的比较得出合理的工艺参数。同时,对飞剪机的结构原理和运动原理进行分析研究,提出优化方案,使其结构更加合理,运动更加平稳。在钢管的剪切过程中,剪切方式、横向拉刀的切削深度、纵向切刀的形状、冲裁间隙、冲裁速度是影响剪切质量的主要因素。理论分析纵向切刀的轮廓曲线,由于刀尖部分细而长,刀具刚性差,寿命短,进而采用二次剪切的剪切方式,并通过合理的刀尖角度设计,得到合理的刀片轮廓曲线。理论分析横向拉刀的切削深度对纵向切刀受力和横向切削质量的影响,以及剪切速度、冲裁间隙对剪切质量的影响,得到合理的横向切削深度、剪切速度和合理的冲裁间隙。随着计算技术的飞速发展,CAE技术也得到了快速的发展。利用计算机进行有限元仿真研究具有系统性好、继承性好、可延续性好等优点,还不受时间、空间和实验条件的限制。本文运用金属塑性成形有限元软件Deform进行钢管剪切过程的动态有限元模拟,将模拟数值与理论值相比较,验证理论分析的正确性。对飞剪机进行实体测量,根据实际测量并修正后的数据,运用SolidWorks三维软件建立飞剪机的3D模型,观察其结构原理和各部分的运动原理,运用SolidWorks软件中的Cosmos Motion插件进行运动仿真分析,并输出主要运动零件的位移曲线、速度曲线和加速度曲线,并对其进行分析。输出飞剪机运动的时序图,进一步了解飞剪机的整体运动情况,针对其结构的不合理之处提出优化建议,使其结构更加合理、运动更加平稳,提高剪切质量和生产效率的同时,降低工作噪声,提高安全系数。飞剪机的应用使钢管生产迅速向高速化、连续化、自动化、高加工质量的方向发展,提高剪切质量的同时提高生产效率,并广泛适用于各种材料和壁厚的管材。更多还原

【Abstract】 With the steady development of the social economy and the progress of science technology, the manufacturing technologies have been improved significantly. In industrial processing process, not only requires to raise processing quality while improve machining efficiency, but also demands to reduce processing operations, economize on raw materials, reduce artificial operation, reduce production costs, reduce the noise, and so on. In the continuous production process of steel tube, online high-speed cutting equipment is one of the key equipments in the whole production line. Its performance will directly affect the quality of steel shear and production efficiency of all lines. Usually, the cutting method of the steel tube has many problems, so the processing quality and the cost were increased.This paper analyzes the shear quality factors of flying shear machine (steel tube high-speed cutting institutions), and the reasonable technical parameters were got through analysis the simulated results. At the same time, the structural principle and the moment principle of the flying shear machine were studied and the optimization solution was proposed. The structures of the flying shear machine more reasonable and the exercise more smoothly.In steel shear process, shearing mode, the depth of horizontal broaching blade, the edge contour of vertical blade, blanking clearance and vertical blade’s shape are the main factors of influence the shear quality. Though theoretical analysis the curve of vertical blade, the closer the distance to the peak of the tool is, the smaller the slop change and the thinner and longer the tool nose are, which leads to the bad rigidity and short life of the blade. So the shearing mode of double-cut was applied. In addition, the reasonable angle of vertical blade nose was designed, and the reasonable contour of vertical blade was got. The cutting depth of horizontal broaching blade effects on the force of vertical blade’s puncturing the tube wall and the quality of vertical cutting were theoretically analyzed, and the reasonable depth was got. Shearing velocity and blanking clearance affecting on the shearing quality were theoretically analyzed, and the reasonable shearing velocity and blanking clearance were got. Along with the rapid development of computing technology, CAE technology can also be fast developed. Applying the computer in finite element simulation research has many advantages, such as: good systemic, good succession and good continuity. Besides, the research is not limited by time and space. The finite element software of metal plastic forming was applied to dynamic finite element simulation of the steel tube shearing process, and the numerical simulation was compared with the theories to test the theoretical correctness.The flying shear machine was entity measurement, and the 3D model was built using SolidWorks 3D software according to the measurement and revised data. The structural principle and each part of the principle of movement were observed. Cosmos Motion program in the SolidWorks software was applied to analysis of motion simulation, and the displacement curve, speed curve and acceleration curves of major sports parts were output and analyzed. The movement sequence chart of flying shear machine was output to the further understanding of the holistic movement of situation of the flying shear machine. The unreasonable structures were optimized, which exercise more smoothly and enhance shear quality and production efficiency, reduce noise, improve safety coefficient.The application of the flying shear machine can make the steel tube be produced much more quickly, continuously, automatically and high machining quality. Not only achieved to raise processing quality while improve machining efficiency, but also widely applied to shear a variety of materials and wall thickness of tubes.更多还原