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Boring tool, particularly a reamer

A technology of drilling tools and reamers, which is applied in the direction of reamers, manufacturing tools, drilling accessories, etc., can solve the problems of large time consumption and achieve the effect of reducing time consumption

Active Publication Date: 2015-12-23
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depending on the size of the cylinder head core bore to be machined, the required duration of the surface treatment is in the range of seconds, for example, which is relatively time-consuming especially in mass production

Method used

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  • Boring tool, particularly a reamer
  • Boring tool, particularly a reamer
  • Boring tool, particularly a reamer

Examples

Experimental program
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Embodiment Construction

[0034] figure 1 A drilling tool is shown, which is used for the surface processing of the core hole 3 of the workpiece 5, followed by Figure 7 and 8 Inner wall 1 shown in . The drilling tool has a clamping shank 7 for clamping in a drill chuck (not shown) of a drilling device and a drilling body 9 connected to the clamping shank. Extending between the flat drill body end face 11 and the clamping shank 7 are two diametrically opposed main cutting edges 13 arranged symmetrically with respect to the drill body longitudinal axis L. The two main blades 13 take the helix angle α ( figure 2 ) extends helically around the longitudinal axis L of the drilling body. In addition, each main blade 13 has a blade protrusion 15 ( figure 2). The cutting edge projection comprises a cutting face 17 facing the corresponding flute-shaped chip space 19 and a free face 21 on the outer peripheral side. The cutting surface 17 of the cutting edge projection 15 and the free surface 21 on the p...

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PUM

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Abstract

The invention relates to a boring tool, particularly a reamer, which comprises a clamping shaft (7) and a boring element (9). Between the end face (11) of the boring element and said clamping shaft (7), at least one main blade (13) extends along a boring element longitudinal axis (L) and comprises a blade projection (15) with a rake face (17) facing a groove-shaped chip space (19), and a free surface (21) on the outer circumferential side, these converging at a cutting edge (23) which runs along the boring element longitudinal axis (L) and which removes material on an inner wall (1) of a pre-bored workpiece core bore hole (3) as a result of said boring tool being rotated. According to the invention, the main blade (13) extending along the boring element longitudinal axis (L) passes, at the boring element end face (11), into a groove blade (25) that is aligned transversely to the boring element longitudinal axis (L). This groove blade (25) allows the boring tool to be displaced, prior to removing the material by rotation, into the core bore hole (3) in an axial lifting motion (h) such that a groove (27) is formed which extends along the core bore hole longitudinal axis (L), the main blade (13) of said boring tool engaging in this groove.

Description

technical field [0001] The invention relates to a drilling tool / drilling tool, in particular a reamer, according to the preamble of claim 1, for surface-surfacing the inner wall of a pre-drilled workpiece core hole according to claim 13 Processing method. Background technique [0002] Such drilling tools are used in automobile construction, for example, in the production of cylinder head bores, ie for finishing the inner walls of the cylinder head bores, thereby improving their surface quality and the shape and dimensional accuracy of the bores. [0003] A drilling or reaming tool is known from patent application DE 3805729 A1, which has a clamping shank and a drilling body. Between the end face of the tool and its clamping shank, three main cutting edges extend helically along the longitudinal axis of the drilling body. Each cutting edge has an edge projection comprising a cutting surface facing the flute-shaped chip space and a free surface on the outer peripheral side. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23D77/14B23D75/00B23D77/00
CPCB23D77/14B23B51/0018B23B2251/285B23D77/00B23D2277/32B23D2277/36B23D2277/60B23D2277/72
Inventor P·科普顿
Owner AUDI AG