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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

Active Publication Date: 2014-01-22
KOMET GROUP GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these measures are limited because the four-fold symmetry of the insert in the region of the cutting edge requires restrictions in terms of shape and because, in order to achieve sufficient clamping precision, only relatively simple contour shapes are permitted for the insert seat
On the other hand, during drilling with solid drills of this type, different cutting speeds occur from the inside to the outside due to the characteristic conditions of their geometry, which lead to differences along the effective cutting edges of the known indexable inserts. wear and tear
Furthermore, in the case of square indexable inserts, unlike the known triangular inserts with arrow-tip-shaped cutting edges, problems arise especially with regard to the centering of the drill at the start of drilling, which have been used hitherto measures have not satisfactorily addressed the

Method used

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  • Integral drill with indexable insert
  • Integral drill with indexable insert
  • Integral drill with indexable insert

Examples

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Embodiment Construction

[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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PUM

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Abstract

An indexable insert for solid drills has four identical cutting edges (30) arranged at a distance above a supporting base (42) and each extending between two cutting-edge corners (28', 28'). The cutting edges are each bounded by a cutting face (46) and a clearance face (48), with the inclusion of a wedge angle (b). Of the cutting edges (30), one in each case is in an active operating position during the drilling operation. To permit optimum adaptation to the cutting conditions and drilling characteristics, varying over the length of the cutting edge of the drilling tool, it is proposed according to the invention that the height (h) of the four cutting edges (30), measured from the plane of the supporting base (42), and / or the clearance angle (a) varies over the length of the respective cutting edges (30).

Description

[0001] This application is a divisional application of the Chinese invention patent application with the application number "200780034776.3". The filing date of the original application is August 31, 2007 (the PCT international application date), the application number is "200780034776.3" (the PCT international application number is PCT / EP2007 / 059108), and the name of the invention is "Indexable blade and the Application of Indexable Inserts in Solid Drills". technical field [0002] The invention relates to a solid drill bit with indexable inserts, the indexable inserts have a support base, four side support surfaces protruding from the support base and four identical cutting edges arranged at a certain height above the support base distance, extending between the two tool tips respectively, and each cutting edge passes through a rake face ( cutting face) and a flank face ( free surface), and of these cutting edges, there is always a cutting edge in the actual use positio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B51/00
CPCB23B27/141B23B2200/125B23B2200/202B23B2200/205B23B51/048B23B2200/123B23B2200/286B23B2251/04Y10T407/1936Y10T407/23Y10T408/905Y10T407/1964Y10T407/192Y10T408/90993Y10T407/195B23B51/00
Inventor J·克鲁申斯基U·克雷奇曼H·尼切H·许特
Owner KOMET GROUP GMBH
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