| 摘要 |
A purging system for an arc welder is disclosed wherein the purging system comprises a control system (20), at least one automatic flow control arrangement (MFC) for a purge gas (28, 30), said flow control arrangement (WIFC) being operably associated with said control system (20), said control system (20) controlling operation of said at least one automatic flow control (MFC) to control flow rate of purge gas (28, 30) to a weld site (W) during a welding operation. An apparatus for purge control of a welding system is disclosed wherein the apparatus comprises a control system (20) and a mass flow controller (MFC), said mass flow controller (MFC) comprising an input that receives a purge gas (28, 30) and an output that provides purge gas (28, 30) to a weld site (W) during a welding operation, said control system adjusting flow of purge gas (28, 30) to the weld site (W) during a welding operation. A welding system (10) is disclosed wherein the welding system comprises a welding power supply (16), at least one mass flow controller (MFC), a control system (20) operably coupled to said mass flow controller (MFC) for controlling flow rate of a purge gas (28, 30) from said mass flow controller (MFC), a housing that encloses said power supply (16), said at least one mass flow controller (MFC) and said control system (20). A method for controlling purging during a welding operation is disclosed wherein the method comprises performing a welding operation, applying a flow rate profile for purge. gas (28, 30) to the weld site during a welding operation, said flow rate profile comprising at least a higher flow rate before a welding operation begins, a lower flow rate during the welding operation, and a higher flow rate after the welding operation ends. A method for controlling purging during a welding operation is disclosed wherein the method comprises performing a welding operation on end to end abutting cylindrical workpieces (WP)1 applying a flow rate profile for ID purge gas to the weld site during a welding operation, said flow rate profile comprising adjusting flow rate during a welding operation as ID purge gas pressure changes during the welding operation. |
