• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.8
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• pp.1324-1330
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• 2003

A cylindrical cam with a translating roller follower provides to change the rotational motion of the cam to the translation motion of the follower. It's a very useful mechanism in the automation. But, it's very difficult that the shape is defined accurately. This paper proposes a shape design method of the cylindrical cam with a translation roller follower using the relative velocity method$\^$(9,11-13)/ : The relative velocity method calculates the relative velocity of the follower versus the cam at a center of roller, and then determines a contact point by using the geometric relationships and the kinematical constraints. Finally, we present examples in order to prove the accuracy of the proposed methods.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.10a
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• pp.639-642
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• 1997

A cylindrical cam with a translation roller follower provides to transfer the translation motion and it s very useful mechanism in the automation. But. it's very difficult that the shape is defined accurately. This paper, proposes a new shape design method of the cylindrical cam with translation roller follower using the relative velocity method[l]. The relativc velocity method lculates the relative velocity of the follower versus the cam at a center of roller, and then determines a contact point by using the geometric relationships and the kinematical constraints. Finally, we present an example in order to prove the accuracy of the proposed methods.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.719-722
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• 2002

Cylindrical cam mechanisms are used commonly in many automatic machinery. But the cylindrical cam is very difficult to design and manufacture the shape. The motion analysis of the cylindrical cam can check the accuracy between designed data and manufactured data of the cam shape and can reproduce without the cam design data. The motion analysis of the cylindrical cam consists of displacement analysis, velocity analysis and acceleration analysis. This paper performs the motion analysis of a cylindrical cam with translating follower by using a relative velocity method and a central difference method. The displacement is calculated by using the central difference method and the velocity is calculated by the relative velocity method. The relative velocity method is defined by the relative motion between follower and cam at a center of a follower roller. The central difference method is derived in the 3 dimensional space.

• Journal of the Korean Society for Precision Engineering
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• v.17 no.8
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• pp.113-119
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• 2000

There are two major factors which affect the cam design : the pressure angle and the radius of curvature, Cam shape will have an instantaneous radius of curvature at every point. Even though the design constraint of the pressure angle has been satisfied the follower may still not complete the desired contact motion. If the radius of the follower roller is larger than the concave(negative) radius on the cam it occurs the gap between the cam and the follower roller at the contact point. And also if the curvature of the pitch curve of the cam is too sharp the cam profile may be undercut. This paper proposes a new approach which uses the relative velocity of the follower roller parallel to the tangent line at the contact point on the cam surface for determining the pressure angle and the relative acceeration for determining the radius of curvature.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.10a
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• pp.127-128
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• 2009