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Research on Contour Error Based on CNC Multi-axis Motion Control System
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作者 SUN Jian-ren HU Chi-bing WANG Bao-min 《International Journal of Plant Engineering and Management》 2010年第2期125-128,共4页
The contour error was analyzed based on CNC multi-axis motion control, the contour error model was obtained focused on beeline and different radius of curvature and common contour of curve, for a CNC biaxial motion co... The contour error was analyzed based on CNC multi-axis motion control, the contour error model was obtained focused on beeline and different radius of curvature and common contour of curve, for a CNC biaxial motion control system and the mechanism of producing contour error and the relationship between tracking error and contour error were presented. The theoretical and practical significance of modeling error and controlling error in motion control systems was carried out. 展开更多
关键词 cnc multi-axis motion control contour error tracking error
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MODELING AND COMPENSATION TECHNIQUE FOR THE GEOMETRIC ERRORS OF FIVE-AXIS CNC MACHINE TOOLS 被引量:32
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作者 Wang ShuxinYun JintianZhang ZhifeiLiu YouwuZhang QingSchool of Mechanical Engineering,Tianjin University,Tianjin 300072, China 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2003年第2期197-201,共5页
One of the important trends in precision machining is the development ofreal-time error compensation technique. The error compensation for multi-axis CNC machine tools isvery difficult and attractive. The modeling for... One of the important trends in precision machining is the development ofreal-time error compensation technique. The error compensation for multi-axis CNC machine tools isvery difficult and attractive. The modeling for the geometric error of five-axis CNC machine toolsbased on multi-body systems is proposed. And the key technique of the compensation―identifyinggeometric error parameters―is developed. The simulation of cutting workpiece to verify the modelingbased on the multi-body systems is also considered. 展开更多
关键词 error compensation multi-body systems identifying multi-axis cnc machinetools
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面向CAPP系统的刀具资源管理模块开发
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作者 迟露鑫 岑海堂 《内蒙古工业大学学报(自然科学版)》 2008年第1期70-75,共6页
本文提出了一种基于C/S模式的制造资源管理模块,介绍了系统的总体框架、功能模块、设计过程,并完成了数控刀具资源模块的软件开发.
关键词 数控刀具 制造资源管理 数控刀具资源模型 CAPP
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GCMT2500大型复合数控机床再制造技术应用 被引量:3
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作者 于海峰 田国富 王涛 《重型机械》 2018年第1期1-7,共7页
目前国内废旧机床的数量庞大,再制造技术能到达对资源的充分利用、节约能源减少污染的目的,机床的再制造技术会是未来技术发展的必经之路。本论文以GCMT2500大型复合数控机床为例,首先对其再制造实践过程进行了详细介绍,包括再制造方案... 目前国内废旧机床的数量庞大,再制造技术能到达对资源的充分利用、节约能源减少污染的目的,机床的再制造技术会是未来技术发展的必经之路。本论文以GCMT2500大型复合数控机床为例,首先对其再制造实践过程进行了详细介绍,包括再制造方案,拆卸方案和清洗方案的设计;然后对介绍了再制造流程的具体实施;最后对再制造机床的精度进行检验,为废旧机床的再制造提供了理论和实践的基础。 展开更多
关键词 再制造 GCMT2500大型数控机床 机床再制造 机床精度检验
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数控机床电气故障维修分析 被引量:2
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作者 顾家佳 《中小企业管理与科技》 2019年第21期138-138,140,共2页
相对来说,数控机床组成系统比较复杂,对维修人员的素质要求比较高,当数控机床出现电气故障时,将会严重影响机床的使用效率和机械制造的生产质量.因此,必须要加强对数控机床电气故障的维修分析,通过科学可靠的数控机床维修方法,保证数控... 相对来说,数控机床组成系统比较复杂,对维修人员的素质要求比较高,当数控机床出现电气故障时,将会严重影响机床的使用效率和机械制造的生产质量.因此,必须要加强对数控机床电气故障的维修分析,通过科学可靠的数控机床维修方法,保证数控机床能够持续稳定地运行.论文针对数控机床电气的各种故障进行分析,并且结合实际情况,提出维修实例作为参考意见,为电气故障的处理效果提供保障. 展开更多
关键词 数控机床 电气故障 维修
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Study on Approach for Computer-Aided Design and Machining of General Cylindrical Cam Using Relative Velocity and Inverse Kinematics
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作者 Se-Hwan Park Byong-Kook Gu +1 位作者 Joong-Ho Shin Geun-Jong Yoo 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期205-,共1页
Cylindrical Cam Mechanism which is one of the best eq uipments to accomplish an accurate motion transmission is widely used in the fie lds of industries, such as machine tool exchangers, textile machinery and automa t... Cylindrical Cam Mechanism which is one of the best eq uipments to accomplish an accurate motion transmission is widely used in the fie lds of industries, such as machine tool exchangers, textile machinery and automa tic transfer equipments. This paper proposes a new approach for the shape design and manufacturing of the cylindrical cam. The design approach uses the relative velocity concept and the manufacturing approach uses the inverse kinematics concept. For the shape desig n, the contact points between the cam and the follower roller are calculated bas ed on relative velocity of which the direction is on the common tangential line, and then the whole shape of cam is determined from transformation of the coordi nate system. For the manufacturing procedures, the location and the orientation of cutter path can be allocated corresponding to the designed shape data. The in tegral NC code for multi-axis CNC machining center is created using the inverse kinematics concept from the data of the location and the orientation of cutter path. As the advantages of the proposed approach, the machine tool is designed t o having an alternative size in fabricating the general cam, while the tool must be fitted to diameter size of the follower in the conventional approach. Finally, CAD/CAM program, "Cylindrical DAM", is developed on C++ lan guage. This program can perform shape design, manufacturing and kinematics simul ation, which can make integral NC code for multi-axis CNC machining center. The proposed method can be applied easily on fields of industries. 展开更多
关键词 Cylindrical Cam Mechanism(CCM) shape design rel ative velocity method NC Code multi-axis cnc machining center inverse kinema tics
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Realization of a 5-axis NURBS Interpolation with Controlled Angular Velocity 被引量:8
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作者 LIU Yuan LI Hui WANG Yongzhang 《Chinese Journal of Aeronautics》 SCIE EI CSCD 2012年第1期124-130,共7页
5-axis machine tool plays an important role in high-speed and high-precision computer numerical control (CNC) machining of workpieces with complex shapes. A non-uniform rational B-spline (NURBS) interpolation form... 5-axis machine tool plays an important role in high-speed and high-precision computer numerical control (CNC) machining of workpieces with complex shapes. A non-uniform rational B-spline (NURBS) interpolation format for 5-axis machining is pro- posed to adapt to the high speed machining (HSM). With this interpolation format, angles between orientation vectors are chosen as parameters of orientation B-spline constructed by an open controller to achieve reasonable orientation vectors in real-time interpolation process. Coordinated motion between linear axes and rotary axes is achieved by building a polynomial spline which relates interpolation arc lengths of position spline to angles of orientation spline. Algorithm routine of this interpolation format and its realization methods in the supported controller are discussed in detail. Finally, performance of the proposed NURBS in- terpolation format is demonstrated by a practical example. 展开更多
关键词 cnc system sculptured surface motion control NURBS interpolation multi-axis machining
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A novel method for solving shortest tool length based on compressing 3D check surfaces relative to tool postures 被引量:2
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作者 Xiangyu LI Junxue REN +2 位作者 Ximing LV Yuke ZHOU Congle LIU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2021年第2期641-658,共18页
Solving the shortest tool length quickly under a known tool trajectory in multi-axis machining of complex channel parts is an urgent problem in industrial production. To solve this problem, a novel and efficient metho... Solving the shortest tool length quickly under a known tool trajectory in multi-axis machining of complex channel parts is an urgent problem in industrial production. To solve this problem, a novel and efficient method is proposed which is featured by extracting only a few necessary curves from the check surface instead of sampling the entire surface. By rotating and compressing the 3 D check surface relative to all tool postures, the boundaries of the area occupied by the 2 D compressed surfaces are the essential elements for determining the shortest tool length. A tracking-based numerical algorithm is introduced to efficiently solve the silhouette curves which are formed in compressing. To define the multi-taper shaped tool holding system(THS) which is commonly used in production, a characterization model for THS profile is established. A model for solving the shortest tool length is finally constructed based on the critical interference relationship between the THS profile and all compressed boundary curves. For acceleration, the boundary splines are segmented according to their knot vectors. Then a new concept called the axis-aligned tool length box(AATB) is introduced,which can provide a conservative range of tool length for a spline segment. By scanning the AATBs of all spline segments, the very few effective spline segments that may ultimately determine the shortest tool length are filtered out. This acceleration method makes the solution for the shortest tool length more focused and efficient. The results of experimental examples are also reported to validate the efficiency and accuracy of the proposed algorithm. 展开更多
关键词 cnc Compressed check surface multi-axis machining Shortest tool length Silhouette curve Tool holding system
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