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Expandable reamer

An expansion type, reamer technology, applied in the direction of reamer, reaming device, manufacturing tools, etc., can solve the problems of adjustment body wear, blade radius cannot be adjusted accurately, blade precise positioning cannot be realized, etc.

Inactive Publication Date: 2013-06-05
MAPAL FABRIK FUER PRAEZISIONSWERKZEUGE (DE)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been found that the adjusting body of the adjusting device is subject to wear and that precise positioning of at least one cutting edge is often not possible because the position of the adjusting body depends on the position of the thread in the base body in which the adjusting screw engages
Typically, the threads are not exactly concentric to the central axis of the expandable reamer, so the radius of at least one cutting edge cannot be precisely adjusted

Method used

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  • Expandable reamer
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  • Expandable reamer

Examples

Experimental program
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Embodiment Construction

[0033] Depend on figure 1 The front part of the first embodiment of the expandable reamer 1 can be seen in FIG. Its left end is interrupted and can be constructed in any known type and has a fastening property, by means of which the expandable reamer 1 can be rotated in the vicinity of the machine tool or intermediate parts, adapters or the like installed. The expandable reamer 1 has a base body 3 with a cavity 7 formed from its right side, ie from its end face 5 .

[0034] In the region of the base body 3 close to the end face 5 , that is to say in the ring section R, the expandable reamer 1 is equipped with at least one geometrically defined cutting edge. In the exemplary embodiment shown here, four pairs of opposing blades can be seen, namely the upper blade 9 and the lower blade 11 . The insert has geometrically defined cutting edges 13 and 15 on its end facing the end face 5 . In principle, it is possible to form the cutting edge directly on the base body 3 of the exp...

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PUM

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Abstract

The expandable reamer (1) has a base body (3), a ring section (R), cutting edge (13,15) which is geometrically defined and provided on the outer surface of the ring section. An adjustment device (21) works on the ring section from inside, has an adjustment screw (23) that adjust the radial position of a cutting edge. The adjustment device is arranged in a cavity (7) provided in the base body of the expandable reamer and has a conical or round outer surface (49).

Description

technical field [0001] The invention relates to an expandable reamer. Background technique [0002] Expandable reamers of the type described herein are known. It has a base body and an annular section, on the outer surface of which at least one geometrically defined cutting edge is arranged. The radial position of at least one cutting edge is adjusted by means of an adjusting device surrounding an adjusting screw. For this purpose, the adjusting body of the adjusting device with a conical or spherical outer surface is moved by means of an adjusting screw in the direction of the central axis of the expandable reamer so that it expands the ring section more or less. It has been found that the adjusting body of the adjusting device is subject to wear and that precise positioning of at least one cutting edge is often not possible since the position of the adjusting body depends on the position of the thread in the base body in which the adjusting screw engages. Typically, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23D77/10
CPCB23D77/10Y10T408/85892Y10T408/8588Y10T408/85843B23D77/08B23B51/08
Inventor 迪特尔·克莱斯
Owner MAPAL FABRIK FUER PRAEZISIONSWERKZEUGE (DE)