【作者】 徐哲；

【导师】 施志辉；

【作者基本信息】 大连铁道学院 ， 机械制造及其自动化， 2003， 硕士

【摘要】 随着现代机械制造业向着自动化、集成化、智能化的先进制造模式方向的发展，实现理想切削加工过程的一个主要问题就是切屑控制问题。本文主要通过计算机仿真技术来实现数控车削加工过程中的切屑控制仿真。 基于切屑形成机理建立了切屑数学分析模型，通过对不同切屑形成机理的分析，讨论了切屑流出、卷曲和折断的规律。提出了一种切屑几何特征造型法，即“基于三角形网格造型法”。论述了仿真几何模型的构建和具体算法。并进一步分析了在切削参数改变的情况下驱动切屑的类型和尺寸所发生的变化，实现了不同切削参数下各类切屑的网格及实体的特征仿真造型。 采用目前广泛使用的图形标准格式OpenGL作为开发平台，利用其特有的双缓存功能，加速了切屑仿真图形的实现。并将其实时溶入数控车削加工仿真过程中，实现了切屑生成与工件材料去除过程的无缝连接。 采用“区域判断法”检查车削运动过程中切屑与工件及刀具的碰撞情况。建立了切屑折断的条件判别式，并由此可准确判别切屑的类型。 系统操作简便，有较好的实时性、交互性和可移植性，具有广泛的应用前景。更多还原

【Abstract】 With the contemporary mechanic manufacturing converting to automatic, integrated and intelligent advanced manufacture mode. Chip control is crucial in order to realize ideal mechanical manufacture process. This dissertation implements the simulation of chip control in NC turning process through computer simulation technology.Mathematics models for the chip’s simulation is established according to the mechanism of it’s generation. The regulations of chip’s generation curling and breaking is analyzed by studying the different chip-forming theories. A method of chip’s geometry feature modeling which is based on Triangle Mesh is presented. Geometry modeling construction and detailed algorithms are discussed. Furthermore, This dissertation analyzes the changing of chip’s varieties and sizes under the conditions of cutting parameters’ changing, realizes the chips’ mesh and solid feature simulation modeling with different cutting parameters.OpenGL as the developing tool is applied. The double buffers of OpenGL make the realization to the graph of chip’s simulation more quickly. The chip simulation is embedded into the environment of NC turning simulation in real-time, which realizes the seamless connection between the generation of chip and the removal of material.Region judgment method to verify the intervention among chip workpiece and cutting tool is used. The conditional expression from which the type of chip can be decided is established.With a preferable real-time interactive and transplantable characteristics, this system can be manipulated simply and will have a broader perspective for application.更多还原