IMPROVEMENT OF CIRCULAR SAWS

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-05-8 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 32, 871-876 pp, DOI: DOI: 10.5593/sgem2017/32/S14.112

ABSTRACT

The article is devoted to the improvement of circular saw machines with pneumatic drive of cutting mechanism. Currently, circular saws are widely used for producing of sawn timber because they have high productivity. The drive of saw blades more often is carried out by electric motors through additional transmission (gear, belt, etc.). In the recent literature are offered technical solutions, in which as a drive of circular saws provided by using of pneumatic. Energy source interacts with the circular saw will allow to decrease the temperature gradient along the radius of disk, and hence reduce the thickness of blade and increase its output of finished product. The article shows the definition of ring-shaped saws, which are looked as toothed rim of circular saw, mounted on a support, with feed of processing material through the central part of the saw. On machines with ring-shaped saws compared to conventional circular saw blades can be processed large-diameter logs. Schematic diagram and description of the circular sawing machine pneumatically driven ring-shaped saws are shown. In viewed design the platter, side guides and air duct with nozzles, which form a closed profile of rectangular cross section to prevent the outflow of air in the radial direction of the saw to the environment, guiding him along the vector cutting speed. Ring-shaped saw is driven by jets of compressed air flowing out of the air duct with nozzles and directed to the rear surface of the saw teeth. In the illustrated construction of circular saw is provided the use of aerostatic supports on the saw side guides and on the platter. Aerostatic supports on the saw side guides allow increasing rigidity and stability of saws and cutting accuracy and quality. Improving efficiency of the circular saw pneumatic drive can be achieved by changing the design of the rear of the saw teeth. Presents two variants of technical solutions recognized by the inventions for which patents were obtained.

Keywords: temperature gradient, circular saw, cooling, aerostatic support, ring-shaped saw.