共查询到19条相似文献,搜索用时 62 毫秒
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新型五坐标并联机床的机构学及运动学 总被引:6,自引:1,他引:5
提出一种新型的五自由度并联机床,由于结构上的特殊设计,它比传统的并联机床具有更高的精度和刚度,更大的工作空间。主要介绍了所提出的并联机床的机构学和运动学,包括运动学的正逆解算法。 相似文献
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并联机床轨迹控制方法的研究 总被引:1,自引:0,他引:1
针对三平动并联机床的结构特点,本文提出一种并联机床刀具轨迹控制虚实映射的插补策略,并给出了基于采用时间采样的直线,圆弧插补算法,根据机床加工和控制要求提出了在操作空间进行速度过渡算法,并总结出了采用光滑非光滑两种过渡的16种方式,文章提出的方法计算简单,实用强,已在所开发的并联机床控制系统中得到了应用。 相似文献
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针对六自由度并联运动机床,论文首先运用MATLAB进行了运动学分析,求出了其运动学逆解模型, 其次在UG软件中建立其三维模型,并将模型导入ADAMS软件中对其进行运动学仿真,得到杆件的运动仿真曲线,通过与MATLAB求解获得的理论曲线相比较,结果是吻合的,从而验证了逆解模型的正确性,为进一步在EMC开放式数控系统的运动模块中建立逆解模型奠定了基础. 相似文献
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一种新型三腿并联机床的位置空间分析 总被引:4,自引:0,他引:4
本文介绍了东北大学新开发的一种新型三腿并联机床,该机床即可进行立式加工又可进行卧式加工。文中对机床的平行约束机构进行了分析,求出了机床的运动学逆解方程。该机床运动学逆解方程形式简单,计算量小,易于进行实时控制,在机械加工等领域具有很高的应用价值。 相似文献
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阐述了国内外虚拟轴机床精度研究概况,以连续法为基础,提出了新的分析方法。同时,根据虚拟轴机床的误差情况分类和实际情况,给出了模型。为以后虚拟轴机床研究提供一个理论依据。 相似文献
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史晓娟 《组合机床与自动化加工技术》2002,(2):39-41
介绍了一具有八轴联动的虚轴机床数控系统的设计开发思想,构造了一具有模块化和开放化的系统结构,给出了该数控系统的硬件总体结构和软件总体结构框图。 相似文献
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Sensitivity analysis of the 3-PRS parallel kinematic spindle platform of a serial-parallel machine tool 总被引:4,自引:0,他引:4
Kuang-Chao Fan Hai Wang Jun-Wei Zhao Tsan-Hwei Chang 《International Journal of Machine Tools and Manufacture》2003,43(15):210-1569
The special configuration of a serial-parallel type machine tool possesses five degrees of freedom and provides more flexibility in NC machining. The parallel spindle platform plays the key role in manipulating three directions of movement. In this study, the inverse kinematics analysis of the platform is derived first. A sensitivity model of the spindle platform subject to the structure parameters is then proposed and analyzed. All the parameters influencing the position and orientation of the spindle platform are discussed based on the sensitivity model and the simulated examples. Critical parameters to the accuracy of the cutter location can then be found, which are the slider position, the strut length, and the tool length. 相似文献
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Typically, the term “high speed drilling” is related to spindle capability of high cutting speeds. The suggested high speed drilling machine (HSDM) extends this term to include very fast and accurate point-to-point motions. The new HSDM is composed of a planar parallel mechanism with two linear motors as the inputs. The paper is focused on the kinematic and dynamic synthesis of this parallel kinematic machine (PKM). The kinematic synthesis introduces a new methodology of input motion planning for ideal drilling operation and accurate point-to-point positioning. The dynamic synthesis aims at reducing the input power of the PKM using a spring element. 相似文献
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A computer simulation approach to machine a complicated three-dimensional surface by using a virtual orthogonal three-rod machine tool is presented. First, based on a Hunt’s parallel mechanism of three degrees of freedom, a three-dimensional virtual orthogonal three-rod machine tool with three degrees of freedom is created with advanced C
software. Secondly, a tool spiral path base on the three-dimensional surface of workpiece is constituted. Thirdly, the tool spiral path base of the three-dimensional surface is assembled into a virtual orthogonal three-rod machine tool with some auxiliary links and a new virtual one-degree of freedom mechanism is created. Finally, by analyzing reversing motion, a reasonable input rotation function is determined, and the kinematic curves of the three rods and the feeding process are simulated and analyzed. 相似文献