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Method and device for monitoring a seam, in particular when joining by means of laser radiation

A laser radiation and laser technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as poor connection and difficult detection

Active Publication Date: 2022-01-11
PRECITEC GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the detection of small defects in the seam is difficult when only the weld bead is evaluated solely by the triangular line in the trailing part according to the light section method
[0022] In order to characterize the quality of weld seams in a robust manner and thus guarantee a high detection rate with few spurious errors for small defects, it is not sufficient to measure the weld bead alone, for example because: Small deviations in parts have resulted in bad connections

Method used

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  • Method and device for monitoring a seam, in particular when joining by means of laser radiation
  • Method and device for monitoring a seam, in particular when joining by means of laser radiation
  • Method and device for monitoring a seam, in particular when joining by means of laser radiation

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Embodiment Construction

[0049] In the respective figures, components and elements corresponding to each other are provided with the same reference numerals.

[0050] Such as figure 1 As shown, the laser processing head 10 has a housing 11 through which a processing laser beam 12 is guided and which is focused by means of a focusing lens 14 on a workpiece 15 . The focal point or focal point 16 is in this case located on the workpiece surface, or close to the workpiece surface at a distance above or below the workpiece surface, depending on the requirements of the desired weld, and melts the workpiece material to weld two sheets or the like together. In this case, the vapor capillary is usually formed in the region of the laser focal point 16, that is to say at the so-called tool center point (TCP), which is also referred to as the welding hole and is located in the processing area. at the center of. A camera 18 is arranged to observe the weld hole or puddle, said camera receiving process radiation,...

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Abstract

The present invention relates to a method for monitoring a joint, in particular a method for monitoring a joint during a joining process by means of laser radiation, in which method: measurement is made in front of the machining point in the machining direction a joint to detect the position and geometry of the joint; determine a position of the seam behind the process at least from the position of the joint in front of the process; and The seam is measured at the determined position behind the processing point in the processing direction to detect geometric properties of the seam. The invention also relates to a device for carrying out the method and a laser processing head equipped with such a device.

Description

technical field [0001] The invention relates to a method and a device for monitoring joints, especially when joining by means of laser radiation, for quality assurance Background technique [0002] 100% inspection and measurement of the seam formed during the joining process, ie the weld bead, is a requirement of joining processes, especially laser welding or soldering, especially in fully automated manufacturing. [0003] The inspection of the weld seam is usually carried out "offline" in a downstream inspection unit with a sensor system which is only used to inspect the seam, in particular a welded or soldered seam. [0004] Welded and brazed seams can be inspected by the seam inspection system from Precitec GmbH&Co.KG Fully automatic monitoring. For this purpose, both sets of rays parallel to one another are projected obliquely across the slot as triangular lines and are viewed by the camera approximately perpendicularly to the slot. In addition, a high-resolution gra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/04B23K26/044B23K9/127B23K31/12
CPCB23K9/1274B23K26/04B23K31/125B23K26/044B23K26/702B23K26/032B23K26/046B23K26/06B23K26/08B23K26/24B23K31/003
Inventor J·施瓦茨S·比尔曼斯
Owner PRECITEC GMBH
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