Device for laser structuring a surface of a through opening in a component

Patent metadata

Field	Value
Publication number	US-2021016391-A1
Application number	US-202016933760-A
Country	US
Kind code	A1
Filing date	Jul 20, 2020
Priority date	Jul 18, 2019
Publication date	Jan 21, 2021
Grant date	—

Abstract

A device for structuring a surface of a through opening in a component, in particular a cylinder opening of a cylinder crankcase for an internal combustion engine. The device comprises a lance, which can be moved into the through opening by a displacement device. The lance has means for emitting a laser beam from a laser light source in the direction of the surface of the through opening. A preferably plate-shaped cover is provided, which is designed for placement on an end face of the component. The cover forms a passage opening which is dimensioned such that the lance can be moved through it. A compressed gas feed is integrated into the cover and comprises a connector for connecting to a compressed gas source and forms one or more outlet openings at the edge of the passage opening.

First claim

What is claimed is:

1 . A device for structuring a surface of a through opening in a component, the device comprising
a lance that is movable into the through opening via a displacement device, the lance adapted to emitting a laser beam from a laser light source in the direction of the surface; and a cover that is designed for placement on an end face of the component, the cover forming a passage opening through which the lance is adapted to be moved; a compressed gas feed integrated into the cover, the compressed gas feed comprising a connector for connecting to a pressurized gas source and forming at least one outlet opening at an edge of the passage opening.

2 . The device according to claim 1 , wherein the outlet opening is designed to have a closed, circumferential ring-shaped form.

3 . The device according to claim 1 , wherein the at least one outlet opening is designed to generate a pressurized gas flow which, when exiting from the outlet opening, is oriented radially or parallel with respect to the longitudinal axis of the passage opening.

4 . The device according to claim 1 , wherein the at least one outlet opening is designed as widening.

5 . The device according to claim 1 , wherein the cover comprises a base body and a cover part, which in combination with one another form the passage opening, wherein the at least one outlet opening is formed by a gap, located between the base body and the cover part.

6 . The device according to claim 1 , wherein the edge of the passage opening that is situated facing away from the side of the cover that is designed to lie adjacent to the component is rounded.

7 . The device according to claim 1 , further comprising a suction device for drawing off gas out of the through opening, wherein the suction device is designed for placement at the other end face of the component.

8 . The device according to claim 1 , wherein the lance is configured such that the laser beam is emitted at an angle, which is included by the longitudinal axis of the lance and deviates from 90°.

9 . A combination of a device according to claim 1 and a component having at least one through opening.

10 . The combination according to claim 9 , wherein the component forms a plurality of through openings, wherein the cover is designed such that the passage opening of the cover is brought into overlap with each of the through openings of the component, wherein the other through openings are then covered by the cover.

11 . The combination according to claim 9 , wherein a diameter of the circular passage opening of the cover on a side, provided for abutting against the component, is larger than a diameter of the cylindrical through opening of the component.

12 . The combination according to claim 11 , wherein the passage opening is larger only in sections than the diameter of the cylindrical through opening of the component with respect to its longitudinal extent.

13 . The combination according to claim 12 , wherein the passage opening in the section with an enlarged diameter is designed, at least in sections, such that it widens in the direction of the side provided for abutting against the component.

14 . The combination according to claim 9 , wherein the component is a cylinder crankcase for an internal combustion engine.

Assignees

• Volkswagen Ag
• Hannover Laser Zentrum

Inventors

• Richter Stefan
• Woehle Joachim
• Hirschfeldt Mike
• Lammers Marius
• Hermsdorf Joerg

Classifications

• C23C24/10 Primary

  with intermediate formation of a liquid phase in the layer · CPC title

• B23K2101/006

  Vehicles · CPC title

• B23K26/082

  Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head · CPC title

• B23K26/352

  for surface treatment · CPC title

• B23K26/125 Primary

  of mixed gases · CPC title