共查询到19条相似文献,搜索用时 109 毫秒
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对于只给定凸轮实际廓线离散点的凸轮机构进行压力角计算,往往受限于缺少凸轮基本尺寸或无法确定从动件运动规律。本文通过对冷镦机摆动滚子从动件凸轮机构压力角求解方法的研究,详细地介绍了如何在只给定凸轮实际廓线离散点的情况下,运用三次样条插值函数求解摆动滚子从动件凸轮机构的压力角。 相似文献
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平面运动从动件等径凸轮机构的设计 总被引:1,自引:1,他引:1
针对平面运动从动件等径凸轮机构,确定了机构安装情况与凸轮运动角的关系,给出了机构结构参量的计算方法,根据预期的推程运动规律建立了凸轮轮廓的设计公式,并在此基础上,导出了机构回程运动规律的解析算式。 相似文献
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基于Matlab和VC++的凸轮机构中从动件运动规律参数化设计 总被引:1,自引:1,他引:1
采用 Matlab和 VC++6 .0联合编程的方法 ,在 VC++6 .0环境下 ,调用 Matlab的 C++函数库 ,开发凸轮机构运动规律参数化设计软件模块系统。本文把从动件的复合运动规律分为常用和非常用两种 ;对于常用的复合运动规律可以对其烦琐的数学表达式直接计算求解 ,而对于有特殊要求的非常用复合运动规律是由基本的运动规律按照拼接条件复合而成。该软件模块为凸轮机构 CAD/ CAM技术及其他类型间歇机构的 CAD软件开发奠定了基础 相似文献
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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. 相似文献
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Zongyu Chang Changmi Xu Tongqing Pan Lei Wang Xichao Zhang 《Mechanism and Machine Theory》2009,44(11):2079-2084
Indexing cam mechanism is one of most important mechanisms in automated machineries. This paper presents a general frame for kinematic analysis and geometry design of indexing cam mechanism, such as parallel cam mechanism and roller gear cam mechanism. This method applied screw theory to describe structure of cam mechanism and developed the kinematic equations by using Product of Exponentials Formula (PEF). As long as such structure parameters are given as position and orientation of central line in turret, cam and rollers, geometry modeling of indexing cam can be implemented in a general frame of kinematic equations by applying this method. The paper gives examples to obtain the geometry models of roller gear cam, barrel indexing cam and parallel indexing cam. Our work suggests that this method can avoid the burdensome work on building coordinate systems, transformation matrix and understanding on the mechanism. Moreover, this method can be used to innovate and design new types of indexing mechanism. 相似文献
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为分析传统的凸轮机构中凸轮轮廓线随从动件运动规律的变化形式,确定凸轮建模的规律和特点,综合利用力学分析和计算机仿真手段,建立了对称凸轮的三维模型。通过改变凸轮的基本参数或选择不同的从动件运动规律,可以快速得到新的凸轮模型,从根本上提高了传统凸轮的设计效率,同时为改进凸轮模型设计奠定了良好的基础。 相似文献
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凸轮机构运动分析与仿真 总被引:1,自引:0,他引:1
对凸轮机构的运动进行了分析,并对其中解析法和基于机械教学综合实验系统的建模仿真进行了较详细的描述,得出采用机械教学实验系统比较容易实现凸轮机构的运动分析。 相似文献