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Optimal design of a linkage–cam mechanism-based redundantly actuated parallel manipulator
《机械工程前沿(英文)》 2021年 第16卷 第3期 页码 451-467 doi: 10.1007/s11465-021-0634-6
关键词: redundant actuation parallel manipulator linkage–cam mechanism Jacobian optimal design
Walha LASSAAD, Tounsi MOHAMED, Driss YASSINE, Chaari FAKHER, Fakhfakh TAHER, Haddar MOHAMED
《机械工程前沿(英文)》 2013年 第8卷 第2期 页码 127-136 doi: 10.1007/s11465-013-0254-x
In this paper we investigate the nonlinear dynamic behaviour of a cam mechanism with oscillating roller follower in presence of defects. The nonlinear developed lumped-mass model includes eight degrees of freedom with two nonlinear hertzian contacts. The first one is located between cam and first roller while the second is between second roller and the sliding rod. The nonlinear dynamic behaviour is described by second order differential equations which are resolved by using the implicit Newmark algorithm combined with the Newton-Raphson iterative scheme. The influence of the cam profile error on the dynamic behaviour is also investigated.
关键词: cam nonlinear behaviour oscillating roller follower profile error
Ghulam ZAKRIA, Zailin GUAN, Yasser RIAZ, Mirza JAHANZAIB, Anwar KHAN,
《机械工程前沿(英文)》 2010年 第5卷 第2期 页码 157-164 doi: 10.1007/s11465-010-0017-x
关键词: computer-aided design (CAD) computer-aided manufacturing(CAM) SMEs analytical hierarchal approach Expert Choice
魏而巍,梁木养,杨平
《中国工程科学》 2000年 第2卷 第4期 页码 59-63
文章介绍了可实用的CAD/CAPP/CAM集成系统。该系统是由机械产品设计人员,工艺人员和数控机床NC编程人员共同努力,在商品CAD/CAM软件Pro/ENGINEER平台上开发的。系统由三个子系统组成:零件信息识别子系统,CAPP子系统和自动CAM子系统。自动CAM子系统根据CAPP的结果,自动生成Pro/ENGINEER的NC工步,经过NC仿真后生成零件加工的刀位文件,再经过NC后处理生成NC代码。
Principle and curve of planetary indexing cam mechanisms
LIU Ming-tao, ZHANG Ce, YANG Yu-hu
《机械工程前沿(英文)》 2006年 第1卷 第4期 页码 475-478 doi: 10.1007/s11465-006-0063-6
关键词: continuity planetary average transmission symmetry intermittent
Hui Ching FAN, Hong Sen YAN
《机械工程前沿(英文)》 2012年 第7卷 第1期 页码 5-15 doi: 10.1007/s11465-012-0310-y
Without modifying the cam contour, a cam mechanism with a variable input speed trajectory offers an alternative solution to flexibly achieve kinematic and dynamic characteristics, and then decrease the follower’s residual vibration. Firstly, the speed trajectory of cam is derived by employing Bezier curve, and motion continuity conditions are investigated. Then the motion characteristics between the plate cam and its roller follower are derived. To analyze the residual vibration, a single degree of freedom dynamic model of the elastic cam-follower system is introduced. Based on the motion equation derived from the dynamic model, the residual vibration of the follower is yielded. The design procedure to improve the kinematic and dynamic motion characteristics is presented and two design examples with discussions are provided. Finally, the simulations of the kinematic and dynamic models by ADAMS are carried out and verified that the design models as well as the performances of the mechanism are feasible.
关键词: cam mechanism variable input speed kinematic design dynamic design optimal design
Influence of temperature on cam-tappet lubrication in an internal combustion engine
CHANG Qiuying, YANG Peiran, WANG Jing, CHEN Quanshi
《机械工程前沿(英文)》 2007年 第2卷 第4期 页码 489-492 doi: 10.1007/s11465-007-0085-8
关键词: coefficient combustion isothermal elastohydrodynamic temperature thickness
An intersection algorithm based on transformation
CHEN Xiao-xia, YONG Jun-hai, CHEN Yu-jian
《机械工程前沿(英文)》 2006年 第1卷 第3期 页码 364-369 doi: 10.1007/s11465-006-0024-0
朱瑞林,朱国林
《中国工程科学》 2012年 第14卷 第10期 页码 90-96
当偏心转子绕定轴旋转时,实际上只有其几何圆心作简谐振动(正/余弦运动),某些情况下由转子驱动的构件(如活塞)并不能作同样的简谐振动,因此在一些过程设备上应用双偏心转子时,会引起一些相关问题,如压力变化问题。为此,在分析一种过程强化装置中所采用的双偏心转子的运动规律的基础上,发现了由于偏心转子所驱动的两活塞的运动不完全对称,可能引起设备内介质压力变化的原因,并提出了相应的解决措施。
《结构与土木工程前沿(英文)》 2023年 第17卷 第5期 页码 796-811 doi: 10.1007/s11709-023-0922-9
关键词: terraced slope safety factor finite element method ABAQUS extended Cam–clay
Shengwen ZHANG, Guicheng WANG, Liang ZHANG, Xifeng FANG
《机械工程前沿(英文)》 2009年 第4卷 第1期 页码 97-102 doi: 10.1007/s11465-009-0007-z
标题 作者 时间 类型 操作
Nonlinear dynamic behaviour of a cam mechanism with oscillating roller follower in presence of profile
Walha LASSAAD, Tounsi MOHAMED, Driss YASSINE, Chaari FAKHER, Fakhfakh TAHER, Haddar MOHAMED
期刊论文
Selecting and prioritizing key factors for CAD/CAM software in small- and medium-sized enterprises using
Ghulam ZAKRIA, Zailin GUAN, Yasser RIAZ, Mirza JAHANZAIB, Anwar KHAN,
期刊论文
the improvement design of dynamic characteristics for the roller follower of a variable-speed plate cam
Hui Ching FAN, Hong Sen YAN
期刊论文
Influence of temperature on cam-tappet lubrication in an internal combustion engine
CHANG Qiuying, YANG Peiran, WANG Jing, CHEN Quanshi
期刊论文
Evaluation of the stability of terraced slopes in clayey gravel soil using a novel numerical technique
期刊论文