【作者】 吴丽君；

【导师】 张永军；

【作者基本信息】 哈尔滨理工大学 ， 机械设计及理论， 2003， 硕士

【摘要】 切屑控制问题是很多先进制造方法在加工过程中碰到的重要问题之一，严重影响生产效能的发挥。切屑控制最主要的两个方面是切屑折断和切屑处理，而在影响切屑形成与折断的诸多因素中，刀片断屑槽型的影响最大，所以，研究断屑槽型是十分必要的。现在我们引入仿真和虚拟现实技术，利用这些技术模拟出：针对不同刀片槽型，切屑的形成与折断过程的不同变化。这样我们就可以通过比较不同槽型产生的不同屑型，确定合适的槽型，实现槽型优选，并能大大缩短以往开发、研制刀片槽型的周期；从而使切屑控制问题得到解决。经过对图形仿真软件Open GL和虚拟现实技术软件World Tool Kit优缺点的分析，决定结合两者的优点进行虚拟现实系统的开发，即需要将OpenGL和World Tool Kit链接到系统的编程环境Visual C++6.0下。在这个编程环境中将切屑形成与折断过程的一系列相关数学模型、数据反映到VC、OpenGL和WTK的各种资源中。首先，经研究确定了开发本系统的基础数据：切屑空间运动轨迹的参数和决定切屑运动轨迹参数的合理初始参数，联系初始参数和切屑运动轨迹参数的一系列数学模型；通过对切屑与障碍物之间作用关系的分析，得出切屑折断的数学模型和判据。通过编程将初始参数和切屑运动轨迹参数相关联，将切屑运动轨迹参数和切屑折断数学模型、判据相关联，将解算出的描述切屑形成与折断的各参数与描述OpenGL创建的三维图形的各参数严格对应，从而得到由切屑形成与折断各参数决定的形象的切屑运动过程的仿真。最后完成了切屑形成与折断虚拟现实系统的整体框架，在切屑形成与折断仿真的基础上，运用WTK技术设置虚拟现实系统的编程环境，初始化环境的计算机建模，完成切屑形成与折断的虚拟现实。本系统能严格实现切削加工初始条件与切屑形成、折断之间的数据对应，即由不同的初始加工参数（包括描述刀片槽型的参数）能得到各种形象、逼真的切屑类型，从而实现槽型优选，为解决切屑控制问题提供了一种良好的方法。更多还原

【Abstract】 It is an important problem that we should control chip during machining process, if we cannot solve it, we’ll not get a high efficiency. This problem mainly involves two parts. Of course, there are many factors affecting chip’s type, but the most important factor is tool’s groove type. So it is necessary to study tool’s groove. Now we introduce simulation and virtual reality technology to machining process and making use of these technologies, we can simulate the different process of chip’s forming and breaking by different types of tool’s groove. By this way, we can get a kind of perfect tool’s groove type to realize the optimization of groove type and cut down the cycle, finally can we control chip.After analyzing the advantages and disadvantages of OpenGL and WTK, we decide to combine the advantages of OpenGL and WTK, namely, we should link OpenGL and WTK to VC environment. In this environment, we connect the relevant math models about chip’s forming and breaking with VC, OpenGL and WTK.First, we decide the basic data of this system: parameters describing chip’s path, parameters, which can decide the parameters describing chip’s path, a series of relevant math model linking these two kinds of parameters and relevant math models of chip’s break by analyzing kinds of reciprocities between chip’s path and barrier.Then, we link the initial parameters to the chip’s forming parameters and link the forming parameters to the breaking parameters by writing program, link the parameters which can describe chip’s forming and breaking to OpenGL and by running the program we can get the vivid chip’s forming and breaking dynamically. Last, on the basis of simulation of chip’s forming and breaking, we can make use of WTK to set the environment of virtual reality and convert the data of chip’s forming and breaking in simulation into virtual reality, thus can we finish virtual reality system of chip’s forming and breaking.In a word, by chip’s forming and breaking simulation and virtual reality system, can we connect the initial parameters of machining with different parameters of chip’s forming and breaking. Namely, we can get different vivid chip’s types from<WP=8>different initial condition parameters (including parameters on tool’s groove types) and realize optimization of tool’s groove. So now we can draw a conclusion that we have found a good way to control chip.更多还原