DE102022117918A1 - Process for rounding the front sides of tubular components - Google Patents

Abstract

In a method for rounding the end faces of tubular components, for example tubes or spring strands (1), one end (5) of the tubular component (1) is to be rounded by laser welding

Description

Technical area

The invention relates to a method for rounding the end faces of tubular components, for example pipes or spring strands.

State of the art

For many industrial applications it is necessary to round the front of tubular components, such as pipes or spring strands. This can be done, for example, for smaller components by applying a drop of weld, for larger components by mechanically applying a cover. The former process results in a very irregular closure, the latter process is complex and vulnerable to a mechanical attack to loosen the closure.

Task

The object of the present invention is to provide a method of the above. To offer a type that allows tubular components to be closed quickly and cost-effectively.

Solution to the task

The solution to the problem is that one end of the tubular component is rounded by laser welding.

A tubular component is understood to mean any geometry of the component that can form an annular end in cross-section. This includes not only circular rings or ovals, but also triangles or polygons.

As an example of the generation of such a laser beam, see DE 10 2016 103 230 B3 referenced, which also describes other possibilities in the prior art.

The rounding occurs by applying a laser beam in the cross-sectional shape of the tubular component to the end of the tubular component, so that the end of the component melts. Melting creates a surface tension in the molten material, which causes a drop-shaped cap to form on the end of the component. This means that the end of the component is rounded. For this purpose, it is preferred that a diameter of the laser beam is equal to or smaller than an outside diameter of the component.

Character description

• 1 einen teilweise dargestellten Längsschnitt durch einen Federstrang;
• 2 einen teilweise dargestellten Längsschnitt durch den Federstrang gemäss 1 mit aufgesetzter Kappe;
• 3 eine diagrammartige Darstellung eines Strahlprofils.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows in

• 1 a partially shown longitudinal section through a spring strand;
• 2 a partially shown longitudinal section through the spring strand according to 1 with cap on;
• 3 a diagrammatic representation of a beam profile.

In 1 is a front area of a spring strand 1 made up of individual turns 2 shown. An annular laser beam 4 with a diameter d equal to or smaller than an external diameter d1 of the spring strand 1 is directed onto the end 5 of the spring strand 1. A corresponding beam profile of this laser beam 4 is in 3 shown. In the exemplary embodiment, the laser beam profile 4 is round in cross section, with a diagram 6 indicating the laser power for generating the round beam profile 4.

This laser beam 4 is used according to 2 the end 5 of the spring strand 1 is welded on, a teardrop-shaped cap 7 being formed from the material of the melted turns due to the surface tension of the melt.

Reference symbol list

1

spring strand

2

convolution

4

laser beam

5

End

6

diagam

7

cap

d

diameter of 4

d1

Outer diameter of 1

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102016103230 B3 [0006]

Claims (3)

Method for rounding the end faces of tubular components, for example tubes or spring strands (1), characterized in that one end (5) of the tubular component (1) is rounded by laser welding. Procedure according to Claim 1 , characterized in that a beam profile (4, 6) corresponding to a cross section of the tubular component and/or the cap (7) is aligned with the end (5) of the tubular component (1). Procedure according to Claim 1 or 2 , characterized in that a diameter (d) of a laser beam (4) is equal to or smaller than an outer diameter (d1) of the tubular component (1).

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