Integral drill with indexable insert
A technology of integral drill bit and indexing insert, which is applied in the direction of cutting inserts, accessories of toolholders, drill repairing, etc. It can solve problems such as different cutting speeds, wear, and restrictions, and achieve improved cutting performance, increased strength, and reduced cutting resistance. small effect
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[0024] exist Figure 1a The cutters shown in and b are specified for use as integral drills for machine tools. It has a substantially cylindrical drill body 10 which is equipped with two chip flutes 12 , 14 . An insert seat 16, 18 is respectively arranged on the end of one side of the end face of the flute, and is used for respectively mounting an indexable insert 20, 22 whose outline is substantially square. The indexable inserts are each fastened to the drill body 10 with a countersunk screw, not shown, which engages in a threaded hole 24 of the drill body 10 . as by Figure 1b It can be seen that the inner indexable insert 20 overlaps the drill bit centerline 32 with its inner tip 28 of the effective edge 30 on one side of the end face, and the outer indexable insert 22 utilizes its effective edge 34 in the area of the outer tip 36 with its inner tip 28. The outer secondary cutting edge 38 protrudes from the outer circumference of the drill body 10 .
[0025] A special...
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