Hibridna analitičko-diskretna metodologija za izračunavanje putanje rezne ivice kod helikoidnog toroidnog reznog alata pri petoosnom glodanju

Abstract

This paper presents a new method to calculate path scallop height of toroidal cutter during free-form surface machining in five-axis milling. The scallop height was defined as the distance between the tool intersection point and the normal point on the part surface. The tool intersection point was determined analytically by implementing the grazing method to define the swept curve of toroidal cutter. Meanwhile the normal surface on the part surface was determined using a hybrid analytical and discrete based methodology. The part surface was discretized by a number of normal vectors, then, they were used for defining the part surface mathematically. In this study, the effect of helical angle of cutting edge was taken into consideration in the model development. The proposed model was successfully used to generate the path scallop data for two model parts with free-form surface profiles. The effect of helical angle to the scallop height was also tested and the results showed that the helical angle tends to decrease the scallop height. The verification test to check the accuracy of the proposed method was performed and the results proved that the method was accurate.