文档介绍：Mechanism and Machine Theory 44 (2009) 1144–1155
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Mechanism and Machine Theory
journal homepage: ate/mechmt
Design of cam-type transfer unit assisted with conjugate
cam and torque control cam
Taik-Min Lee a,*, Dong-Yoon Lee b,1, Ho-Cheol Lee c,2, Min-Yang Yang d,3
a Korea Institute of Machinery and Materials, 171 Jangdong Yusonggu, Daejeon 305-343, Republic of Korea
b Korea Institute of Industrial Technology, 7-47 Songdodong Yeonsugu, Incheon 406-840, Republic of Korea
c Hanbat National University, San 16-1 Duckmyoungdong Yusonggu, Daejeon 305-719, Republic of Korea
d Korea Advanced Institute of Science and Technology, 373-1 Gusongdong Yusonggu, Daejeon 305-701, Republic of Korea
article info abstract
Article history: This paper presents design solutions for cam-type transfer unit in which feeding, lifting,
Received 22 September 2007 and clamping motions are generated by cams. In order to achieve faster transfer motion,
Received in revised form 4 August 2008 each designed cam must satisfy given specifications such as velocity, acceleration, jerk,
Accepted 9 September 2008
pressure angle, cam thickness, and torque. To reduce absolute torque magnitude and tor-
Available online 21 October 2008
que variation, a conjugate cam and a torque control cam are used, respectively. The conju-
gate cam eliminates the redundant preload by using plementary cam to avoid
jumping between a cam and a follower. The torque control cam reduces the torque varia-
Keywords:
tion by applying opposite torque to a cam-shaft. The experimental results show the reduc-
Cam-type transfer unit
Transfer unit tions of the absolute torque value and torque variation, and the improvement on working
Cam speed and life span of the cam-type transfer unit is expected.
Conjugate cam Ó 2008 Elsevier Ltd. All rights reserved.
Torque control cam
1. Introduction
The sheet metal forming process has been widely used for manufacturing defor