THE EFFECT OF THE RAKE ANGLE AND FEED SPEED IN PLANING ON THE SURFACE ROUGHNESS OF BEECH

摘要

Effects of the rake angle and feed rate on the surface roughness of beech (Fagus L.) were investigated on the base of the preparative differences by planing. The specimens were prepared by planing with two knives at 6, 12, 18 and 24 m/min feed rates, in 15°, 20° and 25° rake angles. The machining experiments were carried out using a single cutter-block of a Weinig Powermat 400. The cutter-block with a diameter of Φ 125 mm rotated at 6000 revolutions per minute (RPM). Surface roughness was measured from the radial face of each sample according to DIN 4768 (1990) by using Mitutoyo SJ-201 stylus scanner device. Comparison the results of the surface roughness it has been obtained that the surface roughness decreases when the feed rate decreases and the lowest surface roughness is achieved with rake angle of 20°.