金刚石工具柔性激光焊接技术研究

发布时间：2018-04-22 04:25

本文选题：金刚石工具 + 激光焊接　；参考：《中原工学院》2017年硕士论文

【摘要】：激光焊接是近年来金刚石工具生产的一种重要技术,激光焊接金刚石工具在焊接质量上都要优于传统焊接,但激光焊接金刚石工具设备价格昂贵,柔性较差。本文针对金刚石工具焊接设备的焊接系统进行了设计分析,增加其柔性,实现一机多用,能够焊接金刚石锯片和金刚石钻头;同时借助有限元分析手段对所设计的焊接系统,以金刚石锯片为例,建立热源物理模型,进行温度场和应变场的数值模拟与分析;找出一组较优化焊接参数,为技术人员在确定金刚石工具焊接参数时,提供一种优化、经济的分析方法。焊接系统设计主要分为金刚石工具刀头上料、基体上料、焊接头装置及机架四个部分。金刚石工具刀头上料部分采用自动机械手抓取方式,由机械手抓取刀头后摆动到焊接位置。金刚石工具基体上料部分采用可旋转的两工位工作台,锯片基体上下料采用自动方式,钻头基体上料及固定采用手动方式,焊接过程全部为自动方式。焊接头装置采用能够实现XYZ三个方向运动的结构。在有限元模拟中,通过对锯片的焊接分析,并根据激光深熔焊的原理建立了面-体热源模型,利用ANSYS软件中APDL命令流实现热源的移动加载。在温度场分析中,分析了激光主要参数对温度场的影响,并根据截面熔池分析,找出能够焊透的几组焊接参数。在温度场模拟的基础上,用间接法模拟应变场。通过应变场的模拟,确定出优化的焊接参数。并通过焊接实验验证,用与模拟相同的金刚石锯片以及选择出来的较优化的焊接参数焊接进行焊接实验,最后检测其变形量是否满足要求的方法。结果显示,焊接质量较好,与模拟结果吻合良好。
[Abstract]:Laser welding is an important technology in diamond tool production in recent years. Laser welding diamond tool is superior to traditional welding in welding quality, but laser welding diamond tool equipment is expensive and flexible. In this paper, the welding system of diamond tool welding equipment is designed and analyzed to increase its flexibility, to realize a multi-purpose machine, to weld diamond saw blade and diamond bit, and to make use of finite element analysis to weld the designed welding system. Taking diamond saw blade as an example, the physical model of heat source is established, and the numerical simulation and analysis of temperature field and strain field are carried out, and a set of optimized welding parameters is found, which provides an optimization for technicians in determining welding parameters of diamond tools. A method of economic analysis. The design of welding system is mainly divided into four parts: diamond tool tip feeding, substrate feeding, welding joint device and frame. The feeding part of diamond tool head adopts the automatic manipulator grasping method, which swinging to the welding position after grasping the cutter head. The diamond tool substrate is fed with two worktables which can be rotated, the saw blade substrate is fed automatically, the bit substrate is fed and fixed by manual method, and the welding process is automatic. The welding joint device adopts the structure which can realize the three directions motion of XYZ. In the finite element simulation, by analyzing the welding of saw blade and according to the principle of laser deep penetration welding, the surface body heat source model is established, and the moving load of heat source is realized by using APDL command flow in ANSYS software. In the analysis of temperature field, the influence of the main laser parameters on the temperature field is analyzed. According to the analysis of the weld pool of the cross section, several groups of welding parameters can be found out. Based on the simulation of temperature field, the strain field is simulated by indirect method. Through the simulation of strain field, the optimized welding parameters are determined. The welding experiments were carried out with the same diamond saw blade and the selected welding parameters. Finally, the method of testing whether the deformation of diamond saw blade meets the requirements was tested. The results show that the welding quality is good and the results are in good agreement with the simulation results.
【学位授予单位】：中原工学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ163;TN249

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