A contribution to the study of cutting resistance of milled beech
Research subject and fields:
The paper presents the results of investigation woodworking by milling. The experimental part has been carried out on multispindle milling machines commonly used in woodworking industry for wood processing by chip removing. Two well-established principles were fully respected: (1) the milling tools do not change their rotational frequency, nor their position during milling and (2) the work piece moves at a constant cutting speed at a single pass. The cutting speeds were therefore measured at each pass and the establishment of complex relationships refers to their regression analysis, for four various milling depths, Pr = f(vf); Pr = f(hsr); ks = f(vf); ks = f(hsr). The study of cutting resistance and milling energy has been carried out by using regression analysis with the exponential function. When measurement results were fitted in order to establish the relations between the specific cutting power and the cutting speed, i.e. the average chip thickness, the general straight line form has been chosen.