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Cutting tool, in particular boring bar, and method for machining multiple bores

A cutting tool, cutting edge technology, applied in the field of rotary cutting tools, can solve problems such as not easy

Active Publication Date: 2021-02-05
KENNAMETAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As is known, for example, for reamers, the direct support of the boring bar in the region of the respective cutting edge by the guide element cannot be easily realized here because the boring bar first has to be inserted through the original, yet to be processed orifice

Method used

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  • Cutting tool, in particular boring bar, and method for machining multiple bores
  • Cutting tool, in particular boring bar, and method for machining multiple bores
  • Cutting tool, in particular boring bar, and method for machining multiple bores

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Embodiment Construction

[0059] According to available from Figure 1A , 1B or Figure 5A , 5B, the two implementation variants derived from 5C, the boring bar 2 also configured as a tandem boring bar extends in the axial direction 4 from the rear adapter 6 to the front end side 8 . The boring bar 2 next to the adapter 6 has a rod-shaped base body 10 , on which cutting elements 12 spaced apart from one another in the axial direction are fastened in respective working positions on the base body 10 . All cutting elements 12 are arranged here on the base body 10 at the same angular position and thus lie on a line. Only one cutting element 12 is arranged on the base body 10 for each working position. Furthermore, a guide element 14 designed in the form of a guide plate is arranged on the base body at the guide point of the base body 10 . The cutting element 12 as well as the guide element 14 form a functional element.

[0060] As an alternative to the illustrated solution in which the cutting elements...

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Abstract

The present invention relates to a cutting tool, in particular a boring bar, and a method for machining a plurality of bores. The cutting tool comprises a base body extending in the axial direction, the base body has an axis of rotation, has cutting elements and has a plurality of guide elements spaced apart from the axis of rotation by a guide radius, the base body being divided into a functional area and a The eccentric region, the cutting element and the guide element are distributed over an angular range of less than 180° around the periphery of the basic body, the peripheral side of the basic body in the eccentric region has a reduced distance from the axis of rotation compared to the guide radius, the basic body has a base The main body and at least one balancing element, the balancing element is positioned within the eccentric region and is configured for at least partially balancing an otherwise existing imbalance, a boundary plane is formed between the base body and the balancing element, the boundary plane is parallel to the middle Planar orientation, the midplane is determined by the axis of rotation and the cutting edge angle of the cutting element.

Description

technical field [0001] The invention relates to a rotary cutting tool, in particular a boring bar, and a method for machining a plurality of bores, in particular axially spaced apart from one another by a predetermined distance dimension, by means of such a cutting tool. Background technique [0002] Such a boring bar and such a method are described, for example, in WO 2014 / 195007 A1. [0003] Bearing shafts, such as camshafts or crankshafts in motor vehicles, are usually supported in bearing bores, hereinafter referred to simply as bores, on a plurality of axially spaced bearing beams. Here, the individual bores are usually reamed to final size by means of so-called tandem boring bars. The tandem boring bar has cutting edges arranged offset from each other by a pitch dimension in the axial direction, which cutting edges are respectively provided for machining a respective bore, so that by means of such a tandem boring bar it is possible to pass through the Multiple of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B29/02B23B35/00
CPCB23B29/022B23B41/12B23B29/02B23B35/00B23B2250/04B23B27/002B23B2229/08B23B2229/04B23B51/0054
Inventor M.哈克S.昆希尔
Owner KENNAMETAL INC
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