JPS6265113U - - Google Patents

Description

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the throw-away milling tool of this invention, and Figure 1 is a front view of the milling tool showing the rotation locus with the throw-away tip attached to the cut body. Figure 2 is a developed view of the cutter body with the throw-away tip attached, Figure 3 is a bottom view of the above-mentioned milling tool, and Figure 4 shows the throw-away tip attached to the above-mentioned milling tool. 5 is a view taken along arrow A in FIG. 4, FIG. 6 is a view taken along arrow B in FIG. 4, and FIG. 7 is an enlarged view of section E in FIG. 3. Figures 8 to 10 show the second embodiment. Figure 8 is a front view of the milling tool showing the rotation locus with the throw-away tip attached to the cutter body, and Figure 9 is a front view of the cutting tool showing the rotation locus with the throw-away tip attached to the cutter body. FIG. 10 is an exploded view of the cutting tool with the throw-away tip attached, and is a bottom view of the milling tool. Figure 11, 1st
Figure 2 shows the third and fourth embodiments of this invention.
FIG. 13 is a developed view of the cutter body with the throw-away tip attached to the cutter body, and FIG. 13 is a developed view of the cutter body showing a modification of the fourth embodiment. Figures 14 to 19 show conventional throw-away type milling tools. Figure 14 is a front view of the milling tool showing the rotation locus with the throw-away tip attached to the cutter body, and Figure 15 is a front view of the milling tool. 16 is a bottom view of the cutting tool, FIG. 17 is a front view showing the throw-away tip attached to the cutting tool, and FIG. The figure is a view from arrow C in Fig. 17, and Fig. 19.
The figure is a view taken in the direction of arrow D in FIG. 17. Also, Figure 20~
FIG. 22 shows another conventional example.
The figure is a front view of the milling tool showing the rotation locus with the throw-away tip attached to the cutter body.
Figure 1 is a developed view of the cutter body with the throw-away tip attached, and Figure 22 is a bottom view of the milling tool. 2...Top surface, 3...Redge part, 5...Bottom surface, 12
, 40, 50, 60...Katsuta body, 30, 30
a, 30b, 30c, 30d... Throwaway tip, 31... Rake face, 32... Main cutting edge, 3
3... Central part of the cutting blade, 34... Tip of the cutting blade, 35...
Rear end of cutting blade, α, α1, α2, α3, α4, α5…
...rake angle, β ₁ ...cutting edge angle.

Claims (1)

[Claims for Utility Model Registration] (1) On the outer periphery of the tip of the cutter body, main cutting edges are formed on each of the four ridges on the upper surface, and on the side surface from the main cutting edge to the lower surface which is the seating surface. A plurality of approximately rhombic plate-shaped throw-away chips each having a rake surface are arranged with the approximately rhombic surfaces facing the outer peripheral surface, and the main cutting edges of each other are continuous in the axial direction of the cutter body in their rotation locus. In addition, in the throw-away type milling tool which is detachably mounted spaced apart from each other in the circumferential direction, the throw-away tip has the rake face along the main cutting edge and the rake face at the center of the main cutting edge. The width dimension between the rake faces is formed by a convex curved surface that is larger than the width dimension between the rake faces at the cutting edge tip and the rear end of the main cutting edge, and Matching throw-away tips are arranged with their sharp cutting edges facing alternately towards the distal and proximal sides of the cutter body, and the throw-away tips attached to the cutting edge of the cutter body have their axial A throw-away milling tool characterized by being installed with the rake angle correct and the sharp cutting edge tip facing the tip side of the cutter body. (2) A utility model characterized in that throwaway tips with a positive axial rake angle and throwaway tips with a negative axial rake angle are attached to the cutter body alternately in the circumferential direction. A throw-away milling tool according to claim 1. (3) The scope of the utility model registration claim, characterized in that the positive axial rake angle of the throw-away tip attached to the leading edge of the cutter body is set smaller than the positive axial rake angle of other throw-away tips. The throw-away milling tool according to item 1.