共查询到19条相似文献,搜索用时 182 毫秒
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对平面任意区域填充加工技术进行了研究。给出了基于射线的岛屿关系自动判断 ,提出了一种区域加工单元自动分割算法 ,研究了平面任意区域行切削填充加工刀具路径生成原理和软件关键模块的实现技术。该算法已成功地应用在自主开发的雕刻CAD/CAM系统中 ,通过加工实践 ,能够取得较好加工效果 相似文献
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平面任意区域加工的刀具路径生成技术 总被引:2,自引:0,他引:2
对平面任意区域填充加工技术进行了研究,给出了基于射的岛屿关系自动判断,提出了一种区域加工单元自动分割算法,研究了平面任意区域行切削填充加工刀具路径生成原理和软件关键模块的实现技术,该算法已成功地应用在自主开发的雕刻CAD/CAM系统中,通过加工实践,能够取得较好加工效果。 相似文献
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针对零件轮廓曲率半径和精加工余量对切削力的影响,通过正交切削实验,获得轮廓曲率半径、精加工余量与峰值切削力之间的相互影响关系,提出了一种适用于变曲率轮廓铣削的恒切削力2D轮廓铣削刀具路径生成算法。通过生成一条新的偏置路径,即修正的半精加工刀具路径,调节精加工路径各处余量。将此算法应用于包含自由曲线轮廓的不规则型腔加工,结果表明,该算法可以使精加工中的峰值切削力维持在一个恒定的状态,从而改善了加工质量。 相似文献
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虚拟CNC技术是数控机床仿真系统的核心。本文在反读NC代码的基础上,根据加工刀具的半径补偿和半径补偿数值,将被加工零件轮廓转换为刀具中心运动轨迹,阐述了转换过程中各种补偿模式的处理方法,提出了判定加工段走向的算法,并通过仿真验证。 相似文献
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Hyun-Chul Kim 《The International Journal of Advanced Manufacturing Technology》2010,48(5-8):443-454
In this paper, a tool path generation method for contour parallel milling based on an incomplete two-manifold mesh model, namely, an inexact polyhedron which is widely used in recent commercialized computer-aided manufacturing software systems is presented. The method consists of three major steps: machining area detection, 2D offset, and path linking. Machining areas obtained from a mesh model are closed 2D lines. Thus, offsetting closed lines is essential to generate mesh-based contour parallel tool path. For contour parallel path elements, a new offset algorithm for closed 2D lines with islands is introduced and the result is illustrated. The main point of the proposed algorithm is that every point is set to be an offset using bisectors, and then invalid offset lines, which are not to be participated in offsets, are detected in advance and handled with an invalid offset edge handling algorithm in order to generate raw offset lines without local invalid loops. As a result, the proposed offset method is proved to be robust and simple, moreover, has a near O(n) time complexity, where n denotes the number of input lines. The proposed algorithm has been implemented and tested with 2D lines of various shapes. Finally, contour parallel path is made through linking offset path elements. 相似文献
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General active contour algorithm,which uses the intensity of the image,has been used to actively segment chjects.Because the cbjects have a similar intensity but different colors,it is difficult to segment any object from the others.Moreover,this algorithm can only be used in the simple environment since it is very sensitive to noise.In order to solve these problems.This paper proposes an extended active contour algarithm based on a color variance.In complex images,the color variance energy as the image energy is introduced into the general active contour algorithm.Experimental results show that the proposed active contour algorithm is very effective in various environments. 相似文献
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针对枪口烟雾图像的不规则性以及烟雾扩散速度快等特点,传统的边缘检测算法无法高效地提取烟雾边缘轮廓的问题,对烟雾图像采集技术、烟雾图像预处理技术以及烟雾图像边缘检测技术进行了研究,提出了一种改进的二进小波和抗噪形态学融合的边缘检测算法.首先,在 B 样条二进小波基础上,将二进小波消失矩的阶数提高到四阶;其次,选取方向不同的结构元素,得出改进的形态学算子;最后,用小波逆变换重新构造枪口烟雾图像,对其进行锐化处理,输出边缘信息.仿真结果表明,该算法检测出来的枪口烟雾图像边缘定位准确且清晰完整,能有效抑制噪声,在客观方面优于传统的边缘检测算法. 相似文献
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喷射成形是一种基于快速凝固技术的高温合金、高性能材料制备工艺,对喷射成形过程中沉积锭坯的轮廓及其形状特征进行实时、准确地检测是实现喷射成形工艺稳定性控制的关键。基于机器视觉技术研究了喷射成形锭坯轮廓在线检测方法,设计了视觉检测系统结构,对喷射成形生产环境下的锭坯轮廓图像处理算法进行了研究,提出了锭坯轮廓特征提取方法。实验和测试表明,轮廓及直径、喷射高度的检测精度可达1 mm,算法平均运行时间为0.83 s,可以长时间稳定地在线检测沉积锭坯的轮廓。 相似文献
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为了实现金刚石工具的机器视觉检测,本文先对金刚石工具表面的磨粒在显微镜下进行图像采集,通过聚焦融合方法生成金刚石颗粒的融合图像与其高度矩阵,然后应用动态轮廓模型(Snake)对金刚石的融合图像进行了分割,结合其高度索引图像生成了适合分割的新的图像能量函数,并采用在多分辨率下用遗传算法进行动态轮廓模型的演化,最终得到分割图像。 相似文献