Real-time monitoring device and method of laser filler wire welding transition mode

A technology of laser wire filling and real-time monitoring, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problem of low-precision real-time monitoring of high-speed cameras

Pending Publication Date: 2018-12-25
JILIN UNIV
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Problems solved by technology

Since the camera device is fixed, while the welding device moves and there is no other type of monitoring equipment, the accuracy of high-speed camera real-time monitoring is low

Method used

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  • Real-time monitoring device and method of laser filler wire welding transition mode
  • Real-time monitoring device and method of laser filler wire welding transition mode
  • Real-time monitoring device and method of laser filler wire welding transition mode

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Embodiment

[0030] The technical solutions in the invention will be clearly and completely described below in conjunction with the description and drawings of the invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] Using the above method to keep the liquid metal in the liquid bridge transition mode during the welding process of laser wire filler welding, taking laser wire filler welding of fillet welds as an example, includes the following steps:

[0032] Step (1) Use 1mm and 2mm stainless steel plates in the form of overlapping, the 1mm plate is on the top, and the 2mm plate is on the bottom. The specific specifications of the two plates are 150×100×1.0+150×100×2.0 (unit: mm); the used The welding wir...

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Abstract

The invention relates to a real-time monitoring device and method of a laser filler wire welding transition mode and belongs to the field of control over welding quality. The method can be used for monitoring a transition form of molten welding wires during welding in real time. The implementation of the device is based on a dynamic resistance algorithm, and the device includes a conductive sliding block, a constant current power supply, a following device, a resistance signal monitoring device and a main control module. The stability of the welding process is judged according to a signal change of a resistance value of a circuit added between the welding wires and a base material during welding, and the main control module issues a corresponding command to change the wire feeding speed ofa wire feeding device to achieve the stable liquid bridge transition form during welding.

Description

technical field [0001] The invention relates to the field of welding quality control, in particular to a real-time monitoring device and method for the transition mode of laser filler wire welding. Background technique [0002] At present, laser wire-filled welding technology is widely used. Laser wire-filled welding improves the weld composition and structure by adding welding wire, so as to achieve the purpose of suppressing welding defects and increasing the tolerance of pre-weld assembly gaps. The droplet transfer behavior during laser wire welding is a complex process involving heating, melting and transfer main stages. In the process of laser wire filling welding, the welding wire mainly enters the molten pool in the form of insertion, liquid bridge and drop transition after melting. Among them, in the process of inserting the transition mode, the welding wire will have a strong stirring effect on the molten pool, which will affect the weld formation; in the drop tran...

Claims

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Application Information

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IPC IPC(8): B23K26/211
CPCB23K26/211
Inventor 谷晓燕吴世彪谷晓鹏徐国成
Owner JILIN UNIV
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