Influence of the parameters of deforming cutting on the features of the resulting slotted filter structures

OBRABOTKAMETALLOV Vol. 23 No. 4 2021 TECHNOLOGY Fig. 6 . Theoretical slot width vs tool feed for various values of major cutting edge angle φ Fig. 7. Theoretical slot width b vs tool feed S for vari- ous values of minor cutting edge angle φ 1 reached, which corresponds to the end of the radius region r (see Fig. 5) at the top of the corrugation and the transition to the side regions. Since the cross-section of the lateral regions of the corrugation pro fi le is close to a straight line, with a further increase in the cutting depth, the length of the slots increases linearly (Fig. 8). From the above, we can conclude that to ensure the highest throughput of the fi lter element with the same fi ltration fi neness, one should strive for a depth of cut not less than the depth t r , which ensures complete cutting of the radius region r . The H10F carbide ( Sandvik Coromant ) was used as a tool material for full-depth cutting corrugations by the DC method. The parameters of the instrument used in the experiments are presented in Table. The error of the angular parameters was ± 1°. The choice of the geometry of the tool for the experiment was made based on the experience of us- ing cutters for deforming cutting [21]: the rake, side and end relief angles are selected as typical for cutters intended for obtaining ribbing by the DC method. The minor tool cutting edge angle φ 1 is set close to 90° to ensure the perpendicularity of the slot gap. The lead angle was assigned 38° to obtain the smallest inter fi n gap while maintaining a satisfactory structural strength of the tool. The value of the cutting speed in the framework of this study was taken as a constant and was chosen equal to 207 m/min based on the convenience of observing the experiment. Fig. 8. Theoretical slot length l vs depth of cut t Material and geometrical parameters of the DC cutter φ φ 1 γ γ 1 λ λ 1 α α 1 38.4° 87.6° 47° –60° 54.4° 0° 3° 3° * – for reference. * *