抄録
In order to examine the wear of tungsten carbide saw tips, laminated experimental blocks of particleboard were interruptedly or continuously turned with a single saw tooth tipped with fine, F, medium, G, and coarse, H, grained carbide. The wear of the cutting edge was observed using a light and a scanning electron microscope, and the four wear parameters and the three cutting force components were measured.
The cutting edge of carbide tip wore more on the back face than on the front face, irrespectively of the kind of tip and the method of cutting. The back wear land surface showed a smoother appearance than that of the front face, and for tips F and G striations and grooves developed in the cutting direction on it. In both interrupted and continuous cutting, tip H wore and blunted most among three kinds of tips. Tip G had a constant higher wear resistance, particularly in continuous cutting. Tip F showed a higher performance in interrupted cutting, although its back wear land was relatively wide. It was concluded that the impact in interrupted cutting does not accelerate the wear of carbide tip so much, but some unknown factor in continuous cutting affects more strongly its wear and blunting.
