Prevention of chordal action in chain drives as feed systems in throughfeed machining of wooden panels
Chain drives exhibit the traditional problem of the so-called chordal action.When the chain, consisting of single chain links with finite pitch, is engaged with the sprocket, it forms a polygon around sprocket. The chain links show a different radius, which, combined with a constant revolution speed of the sprocket, leads to varying velocities in the tight and loose strands of the chain drive. These changes in speed cause an acceleration of the chain including dynamic loads, noise emission and wear of different parts of the chain drive. This paper presents a method for compensating this effect. By introducing a guide for the chain, which acts as a disc cam mechanism, it is possible to equalize the variable speed of the chain. The calculation of the guide geometry is shown and the method is verified by measurements in a newly assembled machine for the milling of profiles in wooden laminate floor panels. This machine was selected because there are high requirements on chain drives used as feed systems. These are high feed rates of 200-300 m/min, high machining accuracy and low chain wear. With the newly-built feed system additional investigations on the quality of the milling process were conducted and different tools and parameters were tested.
milling laminate flooring feed system quality tools
Uwe Heisel Marco Schneider
Institute for Machine Tools IfW University of Stuttgart Holzgartenstrasse 17 D-70174 Stuttgart, Germany
国际会议
19th International Wood Machining Seminar(第19届国际木材机械加工研讨会 IWMS19)
南京
英文
113-121
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）