JPS62174819U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a front view of a general right-handed, right-handed, two-flute end mill, Fig. 2 is an enlarged side view of the first embodiment of the portion corresponding to section A in Fig. 1, and Fig. 3 is a side view of the same.
Fig. 4 is a plan view of the same, Fig. 5 is a side view corresponding to Fig. 2 of the second embodiment applied to a 4-flute end mill with right-handed right-hand helix, Fig. 6 is a side view of the same, and Fig. 7 is the same as Fig. The front view, Figure 8 is a comparison diagram of the corner damage width for each constant cutting length at each feed rate between the end mill of the present invention and the standard blade, and Figure 9 is a comparison diagram of the work material drilled in a honeycomb shape by the same drill. A comparison diagram of the occurrence of chipping and chipping at the end mill corner when cutting with different feed rates, Figure 10 is a partially enlarged view of the end mill corner, and Figure 11 is a plan view of a honeycomb-shaped workpiece with many drilled holes. , Figures 12 A, B, C, and D are enlarged recordings of the corners of the workpiece using a shape measuring device.
Figures 3a, b, and c are enlarged views of the part A in Figure 1 of the conventional product, Figures 14a and b are cross-sectional views of the corners of the workpiece machined by the conventional product, and Figure 15 is the enlarged view of the part A in Figure 1 of the conventional product. It is a front view. 1... Corner, 8... Peripheral cutting edge, 9... Bottom cutting edge, α... Radial rake angle, β... Axial rake angle, Υ... Rake face.

Claims (1)

[Scope of utility model registration request] An end mill in which a rake face Υ is formed in the longitudinal direction at a corner 1 where a peripheral blade 8 and a bottom blade 9 intersect, with a radial rake angle α and an axial rake angle β smaller than the torsion angle θ of the peripheral blade.