A welding regime may implements cyclic short circuits under a closed loop voltage control approach. Upon clearing or imminent clearing of the short circuit, a current recess is implemented. The current recess reduces the current that would otherwise be applied to the weld, resulting in multiple bene
A welding regime may implements cyclic short circuits under a closed loop voltage control approach. Upon clearing or imminent clearing of the short circuit, a current recess is implemented. The current recess reduces the current that would otherwise be applied to the weld, resulting in multiple benefits. The recess may be implemented by suspending voltage command signals. Following the current recess, normal control is resumed with the then-current voltage command.
대표청구항▼
1. A welding system comprising: power conversion circuitry configured to convert incoming power from a source to welding power;control circuitry coupled to the power conversion circuitry and configured to: compute command signals via a control process to control the welding power output by the power
1. A welding system comprising: power conversion circuitry configured to convert incoming power from a source to welding power;control circuitry coupled to the power conversion circuitry and configured to: compute command signals via a control process to control the welding power output by the power conversion circuitry in a welding operation, the control process comprising closed loop control of voltage, detection of a predetermined rate of change of a welding parameter, suspension of the closed loop control of voltage and implementation of a current recess based at least in part on detection of the predetermined rate of change of the welding parameter, followed by resumption of closed loop control of voltage after termination of the current recess; andduring the current recess, continue to compute the command signals that would have been applied to the power conversion circuitry but for the current recess, without applying the computed command signals to the power conversion circuitry during the current recess. 2. The system of claim 1, wherein the power conversion circuitry is configured to implement a gas metal arc welding process under the control of the control circuitry, and wherein the system comprises a wire feeder that receives the welding power and applies the welding power to a wire electrode advanced during the welding operation. 3. The system of claim 1, wherein the control circuitry is configured to detect a predetermined rate of change of welding voltage for suspension of the closed loop control of voltage and the implementation of the current recess. 4. The system of claim 1, wherein the current recess reduces current from a level that would result from continued closed loop control of voltage. 5. The system of claim 1, wherein the welding operation comprises an electrode positive process. 6. The system of claim 1, wherein the welding operation comprises an electrode negative process. 7. The system of claim 1, wherein the current recess is of a predetermined duration. 8. The system of claim 1, wherein following the termination of the current recess, the control circuitry applies then-current command signals to the power conversion circuitry continuing as if the current recess had not occurred. 9. A method comprising: computing command signals, via control circuitry executing a voltage closed loop control, to control welding power output by power conversion circuitry in a welding process during a welding operation;monitoring, via the control circuitry, at least one welding power parameter;identifying, via the control circuitry, a rate of change of the at least one welding power parameter;suspending, via the control circuitry, voltage closed loop control of the welding power upon determination that the rate of change of the at least one welding power parameter has reached or exceeded a threshold to create a current recess;during the current recess, continuing to compute, via the control circuitry, the command signals that would have been used to control the welding power but for the current recess; andresuming, via the control circuitry, voltage closed loop control of the welding power following termination of the current recess. 10. The method of claim 9, comprising, following the termination of the current recess, the control circuitry utilizing then-current command signals to control the power conversion circuitry. 11. The method of claim 9, wherein the rate of change comprises a first time derivative of weld voltage. 12. The method of claim 9, wherein during the welding process the weld current comprises a generally saw-tooth profile versus time, and wherein the current recess produces a current gap formed in each tooth of the saw-tooth profile. 13. The method of claim 9, wherein the welding operation comprises an electrode positive process. 14. The method of claim 9, wherein the welding operation comprises an electrode negative process. 15. The method of claim 9, wherein the current recess is of a predetermined duration. 16. A method comprising: computing command signals, via control circuitry executing a voltage closed loop control, to control welding power output by power conversion circuitry in a welding process;monitoring, via the control circuitry, weld voltage;identifying, via the control circuitry, a rate of change of weld voltage to identify when rate of change of weld voltage exceeds a predetermined threshold;based upon the weld voltage exceeding the predetermined threshold, the control circuitry suspending voltage closed loop control of the welding power to create a current recess; andduring the current recess, continuing to compute, via the control circuitry, the command signals that would have been used to control the welding power but for the current recess;resuming, via the control circuitry, voltage closed loop control of the welding power following termination of the current recess. 17. The method of claim 16, wherein during the welding process the weld current comprises a generally saw-tooth profile versus time, and wherein the current recess produces a current gap formed in each tooth of the saw-tooth profile. 18. The method system of claim 16, wherein the current recess is of a predetermined duration.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (101)
Stava Elliott K. (Brecksville OH), Apparatus and method of controlling a welding cycle.
Hauschulz Dana S. ; Hilton Daniel E., Apparatus and methods of making and using heater apparatus for heating an object having two-dimensional or three-dimens.
Tabata Yoichiro (Hyogo JPX) Ueguri Shigeo (Hyogo JPX) Ueda Yoshihiro (Hyogo JPX), Load voltage detecting device for use in an apparatus for supplying a current variable with time to a load section.
Mucha George M. (Parma Hts. OH) Laughlin John R. (Broadview Hts. OH) Nelson William Z. (Attalla AL) Johnson Robert C. (Albertville AL), Method and apparatus for hardening axially spaced cams on a camshaft.
Detert Klaus (Neu-Isenburg DEX) Bertram Wolfgang (Grossauheim DEX) Fischdick Hermann (Neu-Isenburg DEX), Method for preventing cracks below seams during plating and welding.
Deam Rowan T. (11 South Street Hythe ; Southampton SO4 6EA GBX), Monitoring of arc welding by analyzing modulation of radiation from carrier signals superimposed on weld current.
Hughes Travis K. (Madison OH) Campbell Glenn W. (Green Oak IL) Burgoon Charles E. (Kenosha WI) Gossett John B. (Kenosha WI) Spencer Keith R. (West Miltmore IL), System and method for converting an AGTAW welder into an AGMAW welder.
Ross James B. (18775 Devon Ave. Saratoga CA 95070) Tight ; Jr. Dexter C. (590 Menlo Oaks Dr. Menlo Park CA 94025) Tinsley Charles W. (386 Madison Dr. San Jose CA 95123) Kasa Hideki (Moso-Umemachi ; S, System and method for joining plastic materials.
Moss Larry E. (Both of Danville IL) Formanek Randolph P. (Both of Danville IL) Hogg ; deceased Johnny B. (late of Danville IL by Carol Hogg ; executrix) Derby ; Jr. William M. (Bethlehem PA), Welding assurance control techniques.
Davidson, Robert R.; Holverson, Todd; Hayes, L. Thomas; Rappl, James; Uecker, James; Olejnizak, James, Welding-type system with network and multiple level messaging between components.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.