Electric arc length control of circular seam in welding robot based on arc voltage sensing

2022 ◽  
pp. 1-1
Author(s):  
Ting Lei ◽  
Chaoqun Wu ◽  
Huiwen Yu
Keyword(s):  
Electric Arc ◽  
Arc Length ◽  
Welding Robot ◽  
Voltage Sensing ◽  
Arc Voltage

Determining the Rational Electrical Operation Modes of Industrial Electric Arc Furnaces

Vestnik MEI ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 51-57
Author(s):  
Anatoliy M. Kruchinin ◽  
◽  
Mikhail Ya. Pogrebisskiy ◽  
Elena S. Ryazanova ◽  
Andrey Yu. Chursin ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Operation Mode ◽  
Electric Arc ◽  
Transfer Model ◽  
Arc Length ◽  
Column Temperature ◽  
Electric Arc Furnaces ◽  
Arc Voltage ◽  
Operation Conditions ◽  
Arc Furnaces

The choice of a rational electrical mode of existing or newly commissioned electric arc furnaces (EAFs) is a very difficult task for process engineers in view of the influence of external disturbing factors. Based on an electric arc heat-transfer model (EAHTM), a method is proposed, using which the problem of determining the optimal electrical operation mode can be solved with the minimal number of simplifications and assumptions, and with taking into account the specific features of a particular EAF. In solving the problem, the following factors are taken into account: the arc heat transfer conditions in the melting space; the influence of the thermal operation conditions of the electrodes and the arc length on the structure of heat fluxes during the heating by arcs, and the effect the chemical composition of the working medium has on the thermophysical properties of the arc column plasma. The radiation from EAF arcs with taking into account the column temperature profile is calculated using the method of universal arc characteristics based on the solution of a system of nonlinear algebraic equations of the EAHTM column cylindrical model. The arc length calculation is based on the EAHTM structural characteristics method and consists of comparing the arc voltage value calculated using the furnace equivalent circuit equation and the arc voltage calculated using the EAHTM. Knowing the arc length, it is possible to calculate the arc radiation power in the EAF melting space. The choice of an electrical operation mode implies specifying an electrical parameter to be maintained by the controller for a certain period of melting. The value of this parameter (arc current or the EAF phase loop impedance) governs the other electrical parameters of the electric furnace installation, such as arc power, electrical losses, power factors, efficiency, etc. In addition, the correct choice of the electrical operation mode has an influence on other important operational characteristics, such as the specific consumption of electrodes, the duration of the interval between repairs, etc.

scholarly journals Electric Arc Furnace Modeling with Artificial Neural Networks and Arc Length with Variable Voltage Gradient

Energies ◽  
2017 ◽  
Vol 10 (9) ◽  
pp. 1424 ◽  
Author(s):  
Raul Garcia-Segura ◽  
Javier Vázquez Castillo ◽  
Fernando Martell-Chavez ◽  
Omar Longoria-Gandara ◽  
Jaime Ortegón Aguilar
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Voltage Gradient ◽  
Arc Furnace ◽  
Arc Length ◽  
Variable Voltage ◽  
Artificial Neural

scholarly journals Synchronic Fuzzy Control of Master and Slave Arc in Twin-Wire Pulsed Metal Active Gas Welding

2011 ◽  
Vol 2-3 ◽  
pp. 69-73
Author(s):  
Kuan Fang He ◽  
Ji Gang Wu ◽  
Si Wen Xiao
Keyword(s):  
Fuzzy Control ◽  
Correction Factor ◽  
Fuzzy Logic Controller ◽  
Welding Process ◽  
Arc Length ◽  
Arc Voltage ◽  
Base Time ◽  
Feeding Speed ◽  
Wire Feeding ◽  
The Stability

This research aims at the retention of the stability of arcs in twin-arc pulsed metal active gas welding process. That is, a correction-factor fuzzy logic controller (FLC) is designed to keep the stability of arcs of twin-arcs pulsed metal active gas welding (MAG) process. In the controller, the peak arc voltage of the master welding power is controlled by the pulse base time with means of feed back of arc voltage. The peak arc voltage of slave welding power is controlled by the wire feeding speed with means of feed back of peak arc voltage. The adjusting fuzzy control rule with correction factor is introduced to design for controlling rule and table, and the FLC is realized in a Look-Up-Table (LUT) method. With the controller, the arc length can be kept stable in welding process. Experimental results are provided to confirm the effectiveness of this approach.

scholarly journals Stability, spatial extension and extinction of an electric arc in aeronautical conditions of pressure under 540 V DC

2019 ◽  
Vol 87 (3) ◽  
pp. 30901
Author(s):  
Romaric Landfried ◽  
Mohamed Boukhlifa ◽  
Thierry Leblanc ◽  
Philippe Teste ◽  
Jonathan Andrea
Keyword(s):  
High Speed ◽  
Electric Arc ◽  
High Speed Camera ◽  
Arc Length ◽  
Electrode Gap ◽  
Arc Current ◽  
The Mean ◽  
The Stability ◽  
Energy Dissipated

This work deals with the characterization of DC electric arcs in aeronautical conditions of pressure (from 104 Pa to 105 Pa). Observations have been made with the help of a high speed camera and various characteristics of electric arc under 540 V DC have been studied: the stability arc length, the extinction gap, the arc duration and the mean energy dissipated in the arc. The arc current intensity range is 10–100 A. The obtained results show that the arc stability length, extinction electrode gap, arc duration and energy dissipation in the arc have a direct correlation with the pressure and the current in the circuit.

Micro Plasma Arc Welding of AM 350 Precipitation Hardening Alloys

2011 ◽  
Vol 121-126 ◽  
pp. 2681-2685 ◽  
Author(s):  
Kuang Hung Tseng ◽  
Yung Chang Chen ◽  
Yung Chuan Chen
Keyword(s):  
Arc Welding ◽  
Precipitation Hardening ◽  
Argon Atmosphere ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Arc Length ◽  
Weld Shape ◽  
Arc Voltage ◽  
Low Sensitivity ◽  
Micro Plasma Arc Welding

Micro plasma arc welding (micro PAW) was carried out AM 350 precipitation hardening alloy to produce an edge-joint weld. The application of micro PAW technique was also demonstrated in the present work. The results indicated that the arc voltage increased with increasing quantity of added hydrogen in the argon atmosphere. The collimated shape of low current plasma arc was mainly responsible for the low sensitivity of weld shape to variations in arc length. The edge welded bellows of AM 350 alloys have been successfully welded using the present micro PAW technique.

scholarly journals Assessing MMA Welding Process Stability Using Machine Vision-Based Arc Features Tracking System

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 84
Author(s):  
Wojciech Jamrozik ◽  
Jacek Górka
Keyword(s):  
Tracking System ◽  
Welding Process ◽  
Reference Value ◽  
Complementary Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Mma Welding ◽  
Arc Length ◽  
Process Stability ◽  
Geometrical Properties ◽  
Arc Voltage

Arc length is a crucial parameter of the manual metal arc (MMA) welding process, as it influences the arc voltage and the resulting welded joint. In the MMA method, the process’ stability is mainly controlled by the skills of a welder. According to that, giving the feedback about the arc length as well as the welding speed to the welder is a valuable property at the stage of weld training and in the production of welded elements. The proposed solution is based on the application of relatively cheap Complementary Metal Oxide Semiconductor (CMOS) cameras to track the welding electrode tip and to estimate the geometrical properties of welding arc. All measured parameters are varying during welding. To validate the results of image processing, arc voltage was measured as a reference value describing in some part the process stability.

scholarly journals The consumption of carbon in the electric arc. I.- Variation with current and arc-length. II. - Influence upon the luminous radiation from the arc

1915 ◽  
Vol 92 (636) ◽  
pp. 122-143 ◽  
Keyword(s):  
Carbon Atom ◽  
Electric Arc ◽  
Arc Length ◽  
Continuous Current ◽  
Luminous Radiation

Experiments have been carried out to determine the amount of material lost by the poles of a continuous current carbon are under different conditions of current and are-length. The results indicate that when the are-length is extremely small, the loss from the cathode of one carbon atom is accompanied by the transfer between the poles of a quantity of electricity equivalent to four electronic charges, a surprisingly simple conclusion when the complex changes of shape of the carbon poles are taken into account. The experiments were conducted with poles which had been previously burnt to shape by running the are for some minutes before beginning the weighings. This Prevision is of the utmost importance, and is responsible for the remarkable consistency of the observations.

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