共查询到19条相似文献,搜索用时 171 毫秒
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贺文琮 《世界制造技术与装备市场》2003,(6):66-68
棱柱型工件的五个侧面,既可以在具有万能主轴头的四轴铣床上一次装夹加工,也可以采用五轴联动机床加工。在棱柱型工件的五个可触及的平面需要在一次装夹进行加工的情况下,最显然的方法是用五轴联动的机床加上。当然三个直线轴和两个回转轴同时联动的机床主要涉及到更为复杂的加工任务,而且他们已在一般制造业中广泛应用了。 相似文献
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五轴联动机床的空间精度是衡量五轴联动机床性能的关键指标,针对五轴联动激光机床在空间精度检测过程中,因受限于五轴联动激光机床的空间结构特点而难以测量的问题,提出基于两台激光跟踪仪对五轴联动激光机床空间精度进行识别与测量的方法。两台跟踪仪分别记录五轴联动激光机床上下两部分运动轨迹,并将轨迹坐标提取出来,再将坐标值根据相同位置进行综合汇总提取,然后通过曲线拟合得到最终合成轨迹,最后用最小二乘法比较设定轨迹与实测拟合轨迹的差值,得到机床的空间轨迹精度。试验测试表明,相较于传统的激光干涉仪或连杆仪的测量方式,通过双激光跟踪仪标定拟合的方式可以更快速有效地得到五轴联动激光机床绕B、C轴进行RTCP联动的精度和空间轨迹精度,并且该方法具有较高的可操作性与重复性。 相似文献
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五轴联动数控机床的结构和应用 总被引:5,自引:0,他引:5
介绍了五轴联动数控机床的几种结构及其特点和发展趋势;阐述了几种五轴联动机床加工的加工造型、编程(CAD/CAM系统)及其优缺点;详细描述了五轴联动数控机床对数控系统的要求及四开公司五轴联动数控系统的关键参数;列举了四开公司历年来参展的五轴联动数控机床及现场加工工件的情况。 相似文献
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周义 《机械工人(冷加工)》2010,(14):12-13
近年来,随着五轴联动加工技术的成熟应用,五轴联动车铣复合或铣车复合加工中心越来越多地获得了企业的青睐。复合加工机床突出体现了工件在一次装夹中完成大部分或全部加工工序, 相似文献
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针对类回转体曲面高速进给数控加工,提出螺旋线驱动方式下圆环刀具加工轨迹的规划方法。构造螺旋线作为类回转体曲面的导动线,根据曲面上已知接触点轨迹的切线方向估算后续导动点对应的初始接触点。计算初始接触点处圆环刀具的刀心位置,再计算初始刀心位置与后续导动点对应的目标刀位点分别在圆周方向以及轴向的距离差值,利用相邻刀位点与相邻接触点存在的准相似关系,得到接近目标接触点的搜索方向和步长,经过迭代得到目标接触点和刀位点。在分析接触点处曲面曲率和圆环刀曲率的基础上,给出圆环刀加工误差计算方法。将所提出的算法用于鞋楦的五轴数控轨迹规划中,计算结果表明,该算法搜索效率较高,具有理论和实际应用价值,并通过鞋楦的五轴数控加工试验验证了算法的有效性。 相似文献
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In this paper, an efficient method tor generating 5-axis cutting data for a turbine blade is presented. The interference elimination
of 5-axis cutting currently is very complicated, and it takes up a lot of time. The proposed method can generate an interference-free
tool path, within an allowance range. Generating the cutting data just point to the cutting process and using it to obtain
NC data by calculating the feed rate, allows us to maintain the proper feed rate of the 5-axis machine. This paper includes
the algorithms for: (1) CL data generation by detecting an interference-free heel angle, (2) finding the optimal tool path
interval considering the cusp-height, (3) finding the adaptive feed rate values for each cutter path, and (4) the inverse
kinematics depending on the structure of the 5-axis machine, for generating the NC data. 相似文献
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Christophe Tournier Emmanuel Duc 《The International Journal of Advanced Manufacturing Technology》2005,25(9-10):867-875
This paper presents a new method of computing constant scallop height tool paths in 5-axis milling on sculptured surfaces. Usually, iso-scallop tool path computation methods are based on approximations. The attempted scallop height is modelled in a given plane to ensure a fast computation of the tool path. We propose a different approach, based on the concept of the machining surface, which ensures a more accurate computation. The machining surface defines the tool path as a surface, which applies in 3- or 5-axis milling with the cutting tools usually used. The machining surface defines a bi-parametric modelling of the locus of a particular point of the tool, and the iso-scallop surface allows to easily find iso-scallop tool centre locations. An implementation of the algorithms is done on a free-form surface with a filleted end mill in 5-axis milling. 相似文献
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整体叶轮鼓形刀五坐标数控加工刀位轨迹生成 总被引:1,自引:0,他引:1
研究了用鼓形刀具进行整体叶轮五坐标数控加工的编程技术.根据鼓形刀具的几何特点,设计了一种无干涉的鼓形刀刀位轨迹生成算法,开发出整体叶轮五坐标数控加工程序生成功能模块.通过算例,证明设计的鼓形刀无干涉刀位轨迹算法是切实可行的,与球头刀相比,对于同样的残留高度,可以增大加工行距,使刀轨长度变短,可提高整体叶轮数控加工的效率. 相似文献
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为了满足高精度加工大口径光学元件的需求,对原有的三轴机械加工中心上进行了一系列技术改造,从而实现了光学元件的五轴数控加工.介绍了三轴系统数控加工中心到五轴数控加工中心的改造过程,并提出了一种标定改造后主轴参数的方法.该方法运用高精度激光跟踪仪建立坐标系、采集数据,计算系统几何参数,由此对主轴的杆长、摆角等参数进行精确标定和精度分析.结果显示,角度量标定精度优于10.000″,长度量标定精度优于0.040 mm.实验证实提出的方法对类似的工作具有普适性. 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