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Device for evaluating images of weld spots on a carrier material

A technology for carrying materials and solder joints, which is used in measurement devices, welding monitoring devices, analysis materials, etc., can solve the problems of image quality, imprint reflection, etc., and achieve the effect of improved quality, compact structure, and compact design

Inactive Publication Date: 2009-06-10
FRONIUS INTERNATIONAL GMBH
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Problems solved by technology

Another disadvantage here is that the optical detection of the image or imprint takes place with conventional cameras and / or lenses, so that the quality of the captured image can be significantly affected by variable or uneven ambient lighting as well as reflections from the imprint
[0006] Therefore, the prior art methods and devices for monitoring the quality of spot welding have the disadvantage that it is not possible after the welding process under defined constant light conditions and / or ambient light conditions, regardless of the workpieces with immediate and automatic evaluation of the welding results

Method used

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  • Device for evaluating images of weld spots on a carrier material
  • Device for evaluating images of weld spots on a carrier material
  • Device for evaluating images of weld spots on a carrier material

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Embodiment Construction

[0037] FIG. 1 shows a welding tool 1 in the form of a welding torch 2 of a spot welding device 3 for resistance welding of at least two components, for example metal sheets 4 and 5 . Preferably, the welding tool 1 is used in robotic applications for automatic generation of spot welded joints. The welding tool 1 has, for example, two curved or L-shaped holding arms 6 for each receiving an electrode 7 which is connected to a power supply of a spot welding device 3 not shown in the figures. Furthermore, the welding tool 1 is designed to receive and guide a carrier material 8 which is guided through the tip 9 of the electrode 7 via at least one holding arm 6 . Preferably, the carrier material 8 comprises a metal foil or strip 10 which is deformable and displaceable in its longitudinal direction along the surface 11 of the holding arm 6 . For moving and / or conveying the carrier material 8, the welding tool 1 and / or the welding device 3 comprises a positioning unit, eg as will be d...

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Abstract

The invention relates to a device (22) for evaluating an image (20), produced on a carrier material (8) by the spot welding of a weld spot (19) using an optical image detection unit (23), comprising a camera (24) consisting at least of a detection means (25) and a lens (26). To provide an evaluating device (22) with which the optical quality examination of spot welded joints can be improved, the image detection unit (23) has an illuminating means (27) with a diffuser (28) for the diffuse and homogeneous illumination of the image (20) of the spot weld on the carrier material (8). The invention also relates to a welding tool (1) for a spot welding unit, in particular a welding gun (2), having an evaluating device (22) for analyzing an image (20) of a spot weld (19) on a carrier material (8).

Description

technical field [0001] The invention relates to a device for evaluating images formed by spot welding of welding spots on carrier materials using an optical image detection unit, the device includes a camera consisting of at least one detection device and a lens, the device is used for monitoring points welding quality system. [0002] Furthermore, the invention relates to a welding tool for a spot welding device, in particular a welding gun, said welding tool comprising at least one holding arm for an electrode for resistance welding, and to a welding tool for A positioning unit carrying material, in particular a strip which can be guided through the electrodes, for generating an image of a welding spot, in particular a nugget, has an evaluation device for analyzing the image. Background technique [0003] A method for quality monitoring of spot welds is known from US 6,414,261 B1, in which the spot welds are analyzed by evaluating image data recorded by a camera. Here, t...

Claims

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Application Information

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IPC IPC(8): B23K11/25G01N21/88
CPCB23K11/252G01N21/8806
Inventor 马里奥·洛伊佩特斯贝戈尔
Owner FRONIUS INTERNATIONAL GMBH
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