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US 2002/0117496 A1Published application
Welding apparatus for sleeves
AssigneeHBS Bolzenschweiss-Systeme GmbH & Co. KG
InventorWolfgang Hoellinger
Life of this patent
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Abstract
For arc welding a sleeve 3 to a workpiece surface 2, a sleeve holder 1 is surrounded by a field-former unit which contains a magnet coil 4, a magnetic flux return member 6 and a field former 7. A magnetic field is generated with a field component extending radially to the sleeve 3 within the welding gap to set the arc in rotation. To ensure a constant magnetic flux, the field-former unit, in particular its magnet coil 4, is cooled by a temperature-controlled cooling medium circulated through the welding head.
Claims9
A welding apparatus for welding a sleeve to a workpiece, comprising
- a housing,
- a sleeve holder for holding a sleeve so as to define a welding gap between the sleeve and the workpiece,
- a magnet coil surrounding said sleeve holder,
- a magnetic flux return member surrounding said magnet coil,
- a magnetic field former coupled to said magnetic flux return member for producing a magnetic field with a field component that extends radially to the sleeve within said welding gap, and
- cooling means for cooling said magnet coil, said cooling means including an annular groove formed in said housing and having an inner side closed off by said magnetic flux return member, and means for supplying a cooling fluid to said annular groove.
3 more elements
Dependencies are inferred from the claim text.