JPS58196018U - Throw-away end mill - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figures 1 to 5 show an example of a conventional indexable end mill, with Figure 1 being a front view thereof, Figure 2 being a bottom view thereof, and Figure 3 being a developed view showing the arrangement of cutting blade tips. Fourth
The figure shows the cutting process and the arrangement of the cutting tip when viewed from the shank side. Figure 5 shows the cutting process and the rotation of the cutting tip on a plane that includes the shaft of the end mill body. Figures 6 to 10 show other examples of conventional indexable end mills, where Figure 6 is a partially omitted front view, Figure 7 is a bottom view, and Figure 8 is a diagram showing the trajectory. FIG. 9 is a diagram similar to FIG. 4, FIG. 10 is a diagram similar to FIG. 5, and FIGS. 11 to 15 show an embodiment of the invention. , Fig. 11 is a partially omitted front view, Fig. 12 is a bottom view, Fig. 13 is a developed view showing the arrangement of the cutting blade tip, and Fig. 14 shows the cutting process and shows the axis of the end mill body. Figure 15 showing the arrangement of cutting blade tips on a plane containing
The figure shows the cutting order of the cutting blade tip, Figures 16 to 21 show other embodiments of this invention, Figure 16 is a partially omitted front view, and No. 17 is the bottom main view 1. ．． FIG. 18 is a diagram similar to FIG. 13, FIG. 19 is a diagram showing the cutting process and the arrangement of the cutting edge tip when viewed from the shank side, FIG. 20 is a diagram similar to FIG. 14, FIG. 21 is a diagram similar to FIG. 15, FIGS. 22 and 23 show further embodiments of this invention, FIG. 22 is a diagram similar to FIG. 13, and FIG. 23 is a diagram similar to FIG. 15. This is a similar diagram. 21... End mill body, 23... Curved i-line part,
I. IL III, rv, V, VI, ■, ■...Curved cutting edge tip.

Claims (1)

[Claims for Utility Model Registration] 1. Four or more polygonal cutting tips having a straight part and a nose part and forming an outer cutting edge are removably attached to the outer periphery of the tip of the end mill body. An indexable end mill characterized in that the cutting blade tip is arranged so as to satisfy all of the following conditions A to C. A Each cutting edge tip is offset from each other in the axial direction and circumferential direction of the end mill body. B. Each cutting edge tip has a rotation locus on a plane including the axis of the end mill main body of the linear portion on the outer circumferential side thereof, which continues in a straight line to form one outer circumferential edge. C When viewed from the bottom, the pitches of the cutting edges in the circumferential direction are approximately equal to each other. 2. A request for registration of a utility model, characterized in that the length of the peripheral cutting edge formed by the rotation locus is approximately equal to the sum of the lengths of the straight parts forming the peripheral cutting edge of each cutting edge tip. The indexable end mill according to item 1. 3. Each cutting edge tip is arranged so that the difference between the maximum pitch interval and the minimum pitch interval in the axial direction between circumferentially adjacent cutting edges is the smallest, and in an arrangement that satisfies this condition, The indexable end mill according to claim 1 or 2, wherein the indexable end mill is arranged such that the sum of the pitch intervals in the axial direction of adjacent cutting blade tips is the largest.