A method for real-time control of laser welding power
A laser power and real-time control technology, applied in image data processing, instruments, calculations, etc., can solve problems such as the mismatch between wire feeding speed and laser power, achieve good welding results, avoid virtual welding or product burns, and improve the yield rate Effect
Active Publication Date: 2017-10-24
WUHAN LINGYUN PHOTOELECTRONICS SYST
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The invention proposes a method for real-time control of laser welding power, which solves the problem of mismatch between wire feeding speed and laser power in the prior art, and improves the welding quality of welding products
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.
[0052] refer tofigure 1 , the wire feeding mechanism 2 drives the welding wire 3 deep into the welding pad, and the laser 1 emits laser light to irradiate the welding wire 3 to make it melt and infiltrate onto the welding pad.
[0053] First, through multiple experiments, it is found that the power required to melt 1mm welding wire 3 within 1s is P 0 ;
[0054] Assuming that the specific heat capacity of the welding wire is C, the radius of the welding wire i...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method of controlling laser welding power in real time, which comprises the following specific steps: 1) a CCD image sensor in a laser welder is used for acquiring an original image of a welding wire on a welding pad; 2) Canny algorithm is used for processing the original image of the welding wire, and a binary contour image of the welding wire is obtained; 3) in the binary contour image, a vertex (x1, y1) of the welding wire is searched; 4) according to a calculation formula shown as in the specification, the distance L between the vertex of the welding wire and a laser spot center is calculated, wherein (x0, y0) is the pixel coordinates of the laser plate center on the image; and 5) according to the distance L between the vertex of the welding wire and the laser spot center calculated in real time, relative instantaneous power is obtained, and a controller is used for adjusting the laser power to the instantaneous power in real time. The problem that a wire feeding speed and the laser power are not matched in the prior art can be solved. The problems of pseudo welding or burnt products caused due to insufficient energy or overlarge energy can be avoided, and laser welding can be sped up continuously and stably.
Description
technical field [0001] The invention belongs to the technical field of laser welding, and in particular relates to a method for real-time control of laser welding power. Background technique [0002] Laser power control is a very important link in the laser soldering process. The current laser soldering generally adopts the following process: (1) move the workpiece to be welded to the welding position; (2) the laser preheats the solder joint with appropriate energy; (3) the tin feeding mechanism sends the welding wire to the solder joint, and the laser radiation Under the action, the welding wire melts and infiltrates the pad; (4) The tin feeding mechanism withdraws the wire to make the unmelted wire leave the pad, while the laser still emits light so that the melted tin completely infiltrates the pad; (5) The laser stops emitting light and the welding is completed. [0003] However, in the actual laser welding process, due to the different adhesion between the welding wire...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 王龙祥
Owner WUHAN LINGYUN PHOTOELECTRONICS SYST