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Method for Laser Drilling of Components

A technology of laser drilling and components, which is applied to laser welding equipment, engine components, auxiliary devices, etc., can solve problems such as wear and tear of protective devices, increase of scrap rate in production lines, and limit the effective service life of protective devices, so as to achieve durable and reliable protection Effect

Active Publication Date: 2018-09-07
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such protective devices are therefore subject to more or less pronounced wear effects which limit the effective service life of such protective devices
When this protective device is not replaced in a timely manner or periodically, it will lead to an increased scrap rate on the production line

Method used

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  • Method for Laser Drilling of Components
  • Method for Laser Drilling of Components
  • Method for Laser Drilling of Components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] figure 1 A component 10 to be processed by means of laser drilling is shown, which is the combustion chamber-side part of a diesel nozzle. Component 10 is shown during a method phase in which injection holes or boreholes 11 are produced in wall 12 of component 10 with a laser beam having a high pulse power. In order to protect the wall side 13 opposite the wall 12 from damage due to the laser beam emerging from the spray hole rear side 14 at the end of the drilling process, according to the invention a metallic or semi-metallic fluid 16 is sprayed into the cavity 15 delimited by said wall and thus fills it. The sprayed fluid 16 then fulfills a protective function against the laser beam emerging from the spray opening rear side 14 in that it dissipates the energy of the laser beam by absorption.

[0014] In order to allow the fluid 16 to flow through the component 10, a through hole 18 axially penetrating the top of the component is formed along the longitudinal centr...

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PUM

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Abstract

A method for laser drilling a component (10), in particular an injection nozzle which has a hollow space (15), comprises the steps of producing a metallic and / or semi-metallic fluid (16), injecting the fluid (16) into the hollow space (15), drilling, by means of at least one laser beam, a hole (11) in a wall (12) of the component (10) delimiting the hollow space (15), the laser beam being absorbed by the metallic and / or semi-metallic fluid (16) once the hole (11) is produced, and discharging the fluid (16) from the cavity (15) once laser drilling is completed.

Description

technical field [0001] The invention is based on a method for laser drilling of components, in particular injection nozzles, and also a device for carrying out this method. Background technique [0002] During the laser processing of components, in particular rotationally symmetrical components such as injection nozzles, there is the problem of shielding or protecting the component surface from the laser radiation which is in contact with the component wall which is being processed. opposite. For this reason, in the prior art, during the processing stage of laser drilling, a protective device is usually introduced into the cavity of the component to be processed, by which the protective device blocks the Laser beam emitted from the wall of the component. to this end, image 3 An example is shown in top view of a section of a conventional protective device 1 made of metal which, despite its intended use in cavities of diesel nozzles, still suffers due to its typical picosec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/38B23K26/30B23K26/18B23K26/40B23K37/00F02M61/16
CPCB23K37/00B23K26/18B23K26/389B23K26/40B23K26/702B23K2101/04B23K2103/50F02M61/168F02M2200/8069
Inventor F·施塔德勒
Owner ROBERT BOSCH GMBH