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A reaming tool as well as a head and a cutting insert therefor

A cutting insert, reaming technology, used in the field of reaming tools and heads and cutting inserts for reaming tools, which can solve problems such as poor bending strength

Inactive Publication Date: 2012-07-04
SANDVIK INTELLECTUAL PROPERTY AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this regard, screws are characterized by good tensile strength but rather poor flexural strength

Method used

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  • A reaming tool as well as a head and a cutting insert therefor
  • A reaming tool as well as a head and a cutting insert therefor
  • A reaming tool as well as a head and a cutting insert therefor

Examples

Experimental program
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Effect test

Embodiment Construction

[0034] Figure 1-3The reaming tool T shown in includes three main components, namely a drive rod 1, a head 2 and a plurality of cutting blades 3 detachably mounted on the head. In the embodiment of the tool shown, it further comprises a locking member in the form of a nut 4, a forerunner 5, and a sleeve 6 acting between the forerunner and the drive rod. In operation, the reaming tool can be rotated while the workpiece is fed longitudinally, or the tool can be fed longitudinally while rotating the workpiece, thereby providing the desired relative motion between the reaming tool and the workpiece. In the example shown, the last-mentioned alternative is preferred, namely: while the workpiece 7, shown in the form of a tube blank, is rotating in the direction of arrow R, the tool is fed longitudinally, i.e. in the direction of arrow F give tools. When the terms "front" and "rear", respectively, are used in the following description, these terms are relative to the direction of lo...

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Abstract

The invention relates to a reaming tool as well as a head and a cutting insert therefor. The reaming tool includes a head and a detachable cutting insert that is fixed in a seat in the head. The seat includes a radial support surface, a tangential support surface, and an axial support surface, while the cutting insert has the shape of a mirror-symmetrical polyhedron comprising six limiting surfaces, viz. two chip surfaces and at least two clearance surfaces, a number of alternately usable, identical cutting edges being formed in transitions between the chip and clearance surfaces. According to the invention, in at least one of the three limiting surfaces of the cutting insert, there is formed a female- or male-like securing means that co-operates with a complementary, male- or female-like securing means in the seat, more precisely in an inactive, contactless state as long as the cutting insert is held pressed by the cutting forces against the axial support surface of the seat, the securing means being potentially activatable by being brought into contact with each other in case the cutting insert would unintentionally be distanced from the axial support surface against the action of a clamping member.

Description

technical field [0001] In a first aspect, the invention relates to a reaming tool of the type comprising a drive shaft and a head having a rotationally symmetrical basic shape and equipped with one or more removable cutting blades, the head comprising a front end surface and a rear end surface, an enveloping surface concentric with the central axis, and a seat which is countersunk in the enveloping surface and comprises three support surfaces, namely a radial support surface, a tangential support surface and an axial support surface, The insert has a mirror-symmetrical polyhedral shape comprising six confinement surfaces, two of the six confinement surfaces, which are opposite and parallel to each other, are equally spaced apart from the central plane of symmetry and form a chip surface, the chip surface being formed via Alternately identical cutting edges are connected to the limiting surfaces serving as clearance surfaces, and the clamping member keeps the cutting inserts fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23D75/00B23D77/02
CPCB23D77/025B23B2200/128B23B2200/165B23D2277/204B23B2205/12B23D2277/84B23B27/1622B23D77/02B23D77/14B23B51/08B23D77/00Y10T408/95Y10T408/909Y10T408/868Y10T408/9098Y10T407/23Y10T408/892
Inventor 佩尔·汉森
Owner SANDVIK INTELLECTUAL PROPERTY AB
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