Focus control system for laser welding

1997 ◽  
Vol 36 (21) ◽  
pp. 5246 ◽  
Author(s):  
Francis M. Haran ◽  
Duncan P. Hand ◽  
Chris Peters ◽  
Julian D. C. Jones
Keyword(s):  
Control System ◽  
Laser Welding

Laser power stabilizing control system for high-power CO2 laser welding

1994 ◽  
Author(s):  
Guenter Deinzer ◽  
Peter Hoffmann ◽  
Wolfgang Baer ◽  
Manfred Geiger
Keyword(s):  
Control System ◽  
Laser Welding ◽  
High Power ◽  
Laser Power ◽  
Stabilizing Control

scholarly journals Real time control of curved laser welding processes by cellular neural networks (CNN): first results

2010 ◽  
Vol 8 ◽  
pp. 117-122 ◽  
Author(s):  
L. Nicolosi ◽  
R. Tetzlaff
Keyword(s):  
Control System ◽  
Laser Welding ◽  
Real Time ◽  
Laser Beam Welding ◽  
Recent Analysis ◽  
Feedback Signal ◽  
Real Time Control ◽  
Loop Control ◽  
Time Control ◽  
Welding Processes

Abstract. In the last decades the laser beam welding (LBW) has outclassed older welding techniques in the industrial scenario. Despite the improvement in welding technology, sophisticated methods of fault detection are not commonly used in commercially available equipments yet. A recent analysis of process images have revealed the possibility to build up a real time closed loop control system. By the use of image based quality features, a feedback signal can be provided to maintain the process in the desired state. The development of the presented visual control system has been focused on the adjustment of the laser power according to the detection of the so called full penetration hole. Due to the high dynamics of the laser welding, a fast real time image processing with controlling rates in the multi kilo Hertz range is necessary to have a robust feedback control. In this paper an algorithm for the real time control of welding processes is described. It has been implemented on the Eye-RIS v1.2, a visual system which mounts a cellular structure. By applying this algorithm in real time applications, controlling rates of about 7 kHz can be reached. In the following some real time control results are also described.

Optical focus control system for laser welding and direct casting

2000 ◽  
Vol 34 (4-6) ◽  
pp. 415-427 ◽  
Author(s):  
D.P. Hand ◽  
M.D.T. Fox ◽  
F.M. Haran ◽  
C. Peters ◽  
S.A. Morgan ◽  
...  
Keyword(s):  
Control System ◽  
Laser Welding ◽  
Direct Casting

Auto-Control of Defocus Distance during Filling Laser Welding of Ti-Alloy with Wire

2011 ◽  
Vol 287-290 ◽  
pp. 2456-2459 ◽  
Author(s):  
Xin Song Chen ◽  
Wei Yao ◽  
Ai Qin Duan
Keyword(s):  
Control System ◽  
Laser Welding ◽  
Real Time ◽  
Welding Process ◽  
Numerical Control ◽  
Ti Alloy ◽  
Numerical Control System ◽  
Weld Quality ◽  
The Stability

The defocus distance is one of the most important factors during filling laser welding with wire. Keeping defocus distances stability is the pre-condition to acquire the stable weld quality. In this paper, a QUANTA laser camera was used to measure the defocus distance, and it is compensated in real time through the numerical control system. The results reveal that the fixed defocus distances can be acquired using this system. And the experiments by using auto-controlling method of the defocus distance show that the stability of welding process can be improved greatly and the good weld quality can be easy to be obtained.

The Design of PLC Control System on Laser Drill Welding Machine

2014 ◽  
Vol 894 ◽  
pp. 217-221
Author(s):  
Juan Liu ◽  
Yi Huang Lin ◽  
Yang Zhang
Keyword(s):  
Control System ◽  
Fault Diagnosis ◽  
Laser Welding ◽  
Programmable Logic ◽  
Arc Length ◽  
Alarm Signal ◽  
Segment Number ◽  
Diamond Drill ◽  
Welding Machine ◽  
Plc Control

A multifunctional control system on diamond drill laser welding machine was designed. The system mainly contains Siemens S7-200 programmable logic controller and Wei Lun touch-screen interface. It could weld drills of different matrix diameter (Φ20mm-Φ250mm), different segment arc length and segment number automatically. And the utilization of the beam reached 95%. When the system has break down, it will give out alarm signal and make some initial fault diagnosis to handle this problem.

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