Tool for roughening a metallic surface

Patent metadata

Field	Value
Publication number	US-10369639-B2
Application number	US-201515310321-A
Country	US
Kind code	B2
Filing date	Apr 29, 2015
Priority date	May 13, 2014
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

A roughening tool for roughening a metallic surface of an inner wall of a pre-drilled workpiece bore is disclosed. The roughening tool has a profiled contour provided between the tool clamping shaft and the tool tip. With this contour, a roughened structure can be produced through rotation of the tool by processing the metallic surface in a material removing or non-material removing manner The roughening tool includes at least one profiled web which extends along the tool axis, protrudes from a main tool part, and on whose outer web back the profiled contour is provided.

First claim

What is claimed is:

1. A roughening tool for roughening a metallic surface of an inner walling of a pre-drilled workpiece bore, said roughening tool comprising:
a profiling web protruding from a base body of the roughening tool and extending along an axis of the roughening tool, said profiling web having an outer web back provided with a profiling contour extending between a tool tip of the roughening tool and a mounting shaft of the roughening tool, said profiling web ending at the tool tip of the roughing tool with a groove blade, which is oriented transverse to the axis of the roughening tool,
said groove blade being adapted to enable insertion of the roughening tool into pre-drilled workpiece bore with an axial lift movement, and during said lift movement to form a profiling groove in the inner walling of the pre-drilled workpiece bore, said profiling groove extending along the longitudinal axis of the core bore,
said profiling web being adapted to engage in the profiling groove and through rotation of the roughening tool to generate the roughened structure by material-removing or non-material removing processing of the metallic surface of the inner walling of the pre-drilled workpiece bore, when received in the profiling groove and upon rotation of the roughening tool.

2. The roughening tool of claim 1 , wherein a first diameter of the roughening tool at the groove blade is greater than a second diameter of the roughening tool at the profiling contour.

3. The roughening tool of claim 1 , wherein a first tool diameter of the roughening tool at the groove blade is equal to a second tool diameter of the roughening tool at the profiling contour.

4. The roughening tool of claim 1 , wherein the groove blade has a groove-base cutting edge, which converges at a first blade corner with a profiling cutting edge which extends along the tool axis.

5. The roughening tool of claim 1 , wherein the groove blade has a first groove-wall cutting edge and a second groove-wall cutting edge, said first and second groove-wall cutting edge being angled with respect to the groove base cutting edge so that the profile groove formed in the workpiece has a dovetail shape in which side walls of the profile groove form undercuts.

6. The roughening tool of claim 1 , wherein the profiling web at least in a region of the tool tip has at least one of a chip surface, which faces a groove shaped chip space, and a free surface provided on the web back.

7. The roughening tool of claim 6 , wherein the at least one chip surface and the free surface converge at the profiling cutting edge.

8. The roughening tool of claim 6 , wherein a groove-chip surface is formed on the end side of the tool tip, and wherein the free surface and the groove-chip surface converge at a groove base cutting edge of the groove blade.

9. The roughening tool of claim 8 , wherein the groove chip surface formed at the tool tip is delimited by the groove base cutting edge and by a first and a second groove-wall cutting edge of the groove blade, which each transition at a first and a second blade corner of the groove blade into the groove base cutting edge.

10. The roughening tool of claim 1 , wherein the profiling web extends with an angle of twist spirally about the tool axis, and wherein in particular the profiling groove is formable so as to extend spirally in the inner walling of the core bore with the axial lift movement and a rotational movement of the roughening tool which is adjusted to the angle of twist.

11. The roughening tool of claim 6 , wherein the groove chip surface of the groove blade is extended radially inwards with a chip guiding surface formed on the end side of the tool, said chip guiding surface being adapted to push chippings generated during cutting of the profile groove into the chip space which extends along the tool axis.

12. The roughening tool of claim 1 , further comprising at least one drilling-out blade protruding radially from the tool base body and extending along the tool axis.

13. The roughening tool of claim 12 , wherein the drilling-out blade has at least one drilling-out web, said at least one drilling-out web having a chip surface which faces a groove shaped chip space of the roughening tool, and an outer free surface, said chip surface and said outer free surface converging at a drilling-out cutting edge of the drilling out blade, said drilling-out cutting edge extending along the tool axis, and being adapted to drill out the core bore to a final diameter through rotation of the roughening tool.

14. The roughening tool of claim 13 , wherein the drilling-out web terminates at the tool tip with another groove blade, said another groove blade being adapted to generate a drilling-out groove in the inner walling of the core bore during the axial lift movement prior to drilling the core bore to the final diameter, said drilling-out blade during the axial lift movement engaging in the drilling-out groove and upon rotation of the roughening tool drilling out the core bore to the final diameter.

15. The roughening tool of claim 14 , wherein the profiling web and the drilling-out web are configured with a same slope.

16. The roughening tool of claim 14 , wherein a diameter of a back of the drilling-out web is greater than a diameter of the core bore and smaller than a diameter of the profiling contour.

17. A method for roughening a metallic surface of an inner walling of a pre-drilled core-bore of a workpiece, said method comprising:
providing a roughening tool which comprises a profiling web protruding from a base body of the roughening tool and extending along an axis of the roughening tool, said profiling web having an outer web back provided with a profiling contour extending between a tool tip of the roughening tool and a mounting shaft of the roughening tool, said profiling web ending at the tool tip of the roughing tool with a groove blade, which is oriented transverse to the axis of the roughening tool;
in a pre-processing step inserting the roughening tool into the pre-drilled core bore of the workpiece in an axial lift movement, and during the axial lift movement forming with the groove blade a profiling groove in the inner walling of the core bore, said profiling groove extending along an axis of the core-bore; and
in a final processing step, with the profiling web of the roughening tool being arranged in the profiling groove, rotating the roughening tool, whereby the profiling web processes the metal surface in a material removing or non-material removing manner thereby generating a roughened structure.

18. The method of claim 17 , further comprising in the pre-processing step forming with a further groove blade provided on a drilling-out web of the roughening tool a drilling-out groove in the inner walling of the core-bore, and in the final processing step with a drilling-out blade of the drilling-out web drilling out the core bore to a final diameter through rotation of the roughening tool.

Assignees

• Audi Ag

Inventors

• Kopton Peter

Classifications

• B23B29/03464

  Grooving tool · CPC title

• B23P9/02

  Treating or finishing by applying pressure, e.g. knurling (B23P9/04 takes precedence) · CPC title

• B23D13/00

  Tools or tool holders specially designed for planing or slotting machines (features applicable also to turning-machines B23B27/00, B23B29/00; for cutting gear teeth B23F21/04) · CPC title

• B23P9/00 Primary

  Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings (treatment covered by a single other subclass, see the relevant subclass, e.g. B24C, C21D7/00, C22F1/00); Features of such surfaces not otherwise provided for, their treatment being unspecified · CPC title

• B23D13/06 Primary

  Devices for lifting or lowering the tool · CPC title