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Reamer

A technology of reaming drill and drill body, applied in the field of reaming drill, can solve problems such as graphitization, and achieve the effects of low cost, easy manufacture and easy attachment

Active Publication Date: 2019-10-08
KENNAMETAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a great disadvantage of this material is that the high operating temperature leads to its graphitization

Method used

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  • Reamer
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Experimental program
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Effect test

Embodiment Construction

[0017] figure 1 and figure 2 Both show a reamer 10 having a basic body 12 made of hard metal. The basic drill body 12 has a snap-in end 14 , via which the basic drill body can be inserted into a receptacle of a machine tool and thereby rotated.

[0018] Opposite the snap-in end is the so-called front end 16 . A plate-shaped cutting blade 18 is attached to the front face of this front end 16 . The cutting insert 18 has a plurality of cutting edges 20 made of polycrystalline diamond distributed around the circumference.

[0019] The cutting insert itself is a composite part having an upper layer or plate 22 made of polycrystalline diamond and a bottom carrier plate 24 of hard metal. The two plates 22, 24 are sintered together and form a unit.

[0020] The holder 12 in turn has an axial recess 28 at its front end 16 on its front side 26 , which is flat and aligned at right angles to the longitudinal axis of the reamer.

[0021] Projecting through this axial recess 28 are f...

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PUM

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Abstract

The invention provides a reamer having a basic drill body (12) made of hard metal and a plate-shaped cutting insert (18) inserted into a recess at the front (28). The cutting insert (18) is at least partially made of polycrystalline diamond, the cutting edge (20) of the cutting insert is axially offset relative to the cutting edge (30) on the basic drill body (12) set for subsequent engagement with the workpiece.

Description

technical field [0001] The present invention relates to a reamer used at a front end to enlarge a previously drilled opening, particularly a hole such as a valve guide in an engine cylinder head, to a desired size with high precision. Background technique [0002] Such a reamer is known, for example, from CN102059399A. These reamers have, for example, a free end at the front facing the workpiece, said end having a separate head with a cutting edge, and may be made of a harder material than the base drill body material. In addition, some reamers have a plurality of independent cutting blades at a distance from the front end on its circumferential section, each of which is plate-shaped and inserted into a longitudinal direction extending substantially along the length of the basic drill body. in the slot. [0003] Various cutting materials including, for example, hard metals are used for the cutting edges. In addition, polycrystalline diamond is theoretically an advantageou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B51/00
CPCB23B51/0027B23D77/02B23D2277/245B23D2277/2464Y10T408/89B23D77/025B23D77/12B23D2277/02B23D2277/061B23D2277/34B23D2277/44
Inventor M.哈克S.孔希尔W.兰H.曼纳X.斯派奇廷格尔A.齐默尔曼M.戈茨
Owner KENNAMETAL INC