共查询到16条相似文献,搜索用时 171 毫秒
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对常用滚子摆动从动件圆柱凸轮机构作了简要评述,指出其运用中存在的问题和局限性。介绍一种移动从动件圆柱凸轮与摆动导杆组合机构的原理、特点并推导出有关设计计算公式。 相似文献
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摆动从动件圆锥凸轮实体参数化造型 总被引:6,自引:1,他引:5
以AutoCAD2000为平台,应用VB6.0语言编程,开发了圆锥滚子摆动从动件圆锥凸轮实体的参数化造型系统。提供了一种简单实用的空间凸轮实体造型系统开发方法,容易为一般工程技术人员所掌握。该方法也适用于其它机械零件三维实体参数化造型软件的开发。 相似文献
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应用空间啮合原理和旋转变换矩阵理论,推导了圆锥滚子从动件圆柱分度凸轮的理论工作廓面方程及单侧面加工凸轮实际工作廓面方程;廓面采取单侧面加工时,给出了刀具误差对凸轮廓面法向误差影响的精确计算方法和近似计算方法,解决了空间凸轮廓面误差计算的难题,进一步完善了圆柱分度凸轮机构的设计和制造理论。 相似文献
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摆动滚子从动件圆柱凸轮参数化设计 总被引:1,自引:1,他引:1
推导了摆动滚子从动件圆柱凸轮廓线、压力角及廓线曲率半径方程,讨论了该种凸轮机构在各种运转情况下与之相适用的方程。并将方程用于凸轮廓线的参数化设计,通过实例验证该方法在实际应用中具有一定的实用价值。 相似文献
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根据速度瞬心的概念,推导出滚子摆动从动件圆柱凸轮机构压力角的简单关系式,提出了一种求解最小凸轮平均圆柱半径的CAD动态图解法,介绍了在AutoCAD平台上自动设计的过程。 相似文献
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Joong-Ho Shin Soon-Man Kwon Hyoungchul Nam 《International Journal of Precision Engineering and Manufacturing》2010,11(3):419-427
Plate cam mechanism can easily produce the positive and functional motions in contact of cam and follower. Generally cam mechanism
is used in many fields of mechanical control, automation, and industrial machinery. To obtain the accurate motion of follower,
the profile of cam must be designed and machined precisely. This paper proposes an instant velocity center method for the
profile design and a biarc fitting method for the profile machining to 4 different types of plate cam mechanisms with reciprocating
or oscillating motion and roller or flat-faced followers. The key of this paper is the introduction of a hybrid system combined
the design procedures and the manufacturing procedures. The main idea is that the minimum machining data are built by the
accurate biarc curves fitted directly from the design parameters. The radial direction angles toward biarc centers for the
accurate biarc curve fitting can be defined directly by the contact angle of cam and follower given in the design procedures.
An application of the proposed approach is verified the accurate profiles of a designed cam and a machining cam using the
minimum NC data within a given machining tolerance. 相似文献
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