共查询到13条相似文献,搜索用时 62 毫秒
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以Camworks系统及其应用实例为背景,说明Camworks数控加工的基本步骤及其方法,重点介绍运用Camworks系统进行刀具轨迹优化的关键技术和难点,对Camworks在数控加工中的应用进行研究和探讨,为数控编程提供参考. 相似文献
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针对环形刀五轴加工自由曲面的残留误差问题,在传统等残留高度算法的基础上,提出了一种基于定向距离理论的等最大残留高度刀具轨迹规划算法。首先根据微分几何理论计算已知刀触点的初始侧向行距,并在侧向行距方向进行偏置得到相邻刀触点;然后以基于定向距离理论的残高误差计算模型对相邻刀触点间的实际残高值进行计算;最后通过迭代计算规划出等最大残留高度的相邻刀具轨迹。如此循环,从而获得整个曲面的刀具轨迹。实验结果表明,相对于商用软件MasterCAM9.0,该算法在充分保证曲面加工质量的同时最大限度地减小了刀具轨迹的总长度,从而提高了加工效率。 相似文献
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Voronoi图是计算几何中非常有用的工具,它将几何多边形划分为若干子域,每个子域分别对应轮廓中的某段,子域中的任一点到对应的轮廓段距离最近,在各个子域中分别构造对应轮廓段的等分线。把该算法应用到型腔加工中,生成型腔结构的Voronoi图;然后在此基础上利用等距偏置法,生成型腔加工的刀具轨迹。该算法的应用不仅能消除传统刀轨算法中产生的多余环和自交环,避免过切现象,还能提高计算效率和加工精度。 相似文献
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Tool Positioning Algorithm Based on Smooth Tool Paths for 5-axis Machining of Sculptured Surfaces 总被引:2,自引:1,他引:1
XU Rufeng CHEN Zhitong CHEN Wuyi School of Mechanical Engineering Automation Beihang University Beijing China 《机械工程学报(英文版)》2011,(5):851-858
The current research of the 5-axis tool positioning algorithm mainly focuses on searching the local optimal tool position without gouging and interference at a cutter contact(CC) point,while not considering the smoothness and continuity of a whole tool path.When the surface curvature varies significantly,a local abrupt change of tool paths will happen.The abrupt change has a great influence on surface machining quality.In order to keep generated tool paths smooth and continuous,a five-axis tool positioning algorithm based on smooth tool paths is presented.Firstly,the inclination angle,the tilt angle and offset distance of the tool at a CC point are used as design variables,and the machining strip width is used as an objective function,an optimization model of a local tool positioning algorithm is thus established.Then,a vector equation of tool path is derived by using the above optimization model.By analyzing the equation,the main factors affecting the tool path quality are obtained.Finally,a new tool position optimization model is established,and the detailed process of tool position optimization is also given.An experiment is conducted to machine an aircraft turbine blade by using the proposed algorithm on a 5-axis blade grinding machine,and the machined blade surface is measured with a coordinate measuring machine(CMM).Experimental and measured results show that the proposed algorithm can ensure tool paths are smooth and continuous,improve the tool path quality,avoid the local abrupt change of tool paths,and enhance machining quality and machining efficiency of sculptured surfaces. 相似文献
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为了解决分形刀轨中存在的大量空行程和跳刀问题,使用部分边界裁剪轮廓对分形路径段进行了连接。首先采用蚁群算法对同一切片层面上的分形路径段进行初步连接,确定整体最短连接路径。然后依据扫描路径规划原则,对连接路径进行有效性判断,消除了不合理连接路径对成形质量的影响。针对基本蚁群算法存在的收敛慢、易陷入局部最优解等缺陷,采用动态调整选择策略和信息素挥发系数对蚁群算法进行了改进。试验结果表明,该方法有效减少了同一切片层面上的空行程和跳刀次数,且改进的蚁群算法具有很好的收敛效果和全局搜索能力。 相似文献
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