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US 4,542,276 AGranted
Device for welding tubes
AssigneeMantra Tube Ltd.
InventorArie P. van den Berg
Life of this patent
Estimating the term…
Abstract
A device for welding together coaxial tube sections, comprising a cage adapted to surround the extremities of said tube sections, and provided with sleeves to be clamped on said tube sections for aligning the latter, guiding means for welding electrode carriers being connected to said sleeves which are adapted to guide welding electrodes and associated equipment along the welding seam to be formed between said tube sections.
Claims16
A device for welding two tubes end-to-end comprising:
- a pair of coaxial sleeves, a rigid framework defining a cage for supporting said sleeves in axially spaced apart relationship, each sleeve being adapted to surround one tube and being provided with clamping means adapted to hold the tube in axial alignment with a second tube held in the other sleeve while maintaining a gap between the ends of the two tubes, with the gap lying between said sleeves;
- guide means within said cage for guiding at least one welding electrode assembly along a circular path coaxial with said sleeves and contained in a plane lying between and perpendicular to said sleeves for depositing a weld seam within the gap between the tubes clamped in said sleeves;
- the inner transverse dimensions of said cage in the plane of said circular path being substantially greater than the inner diameter of said sleeves.
A device for welding end to end tubes comprising:
- a pair of sleeves, a plurality of frame members defining a cage supporting said sleeves in co-axial, axially spaced spaced apart relationship, each sleeve adapted to surround one tube and being provided with clamping means adapted to hold the tube in axial alignment with a tube held in the other sleeve;
- guide means mounted to one of said sleeves within said cage for guiding one or more welding electrode assemblies along a circular path co-axial with said sleeves, said path contained in a plane lying between and perpendicular to said sleeves for depositing a weld seam between the tubes clamped in said sleeves;
- each said sleeve comprising at least two parts mounted for opening and closing movement transversely to the longitudinal axis of said sleeves, said clamp means being connected for moving said parts into and out of clamping engagement with a tube positioned within said sleeve;
- said framework comprising a plurality of frame members rigid in the axial direction, but not interconnected in the circumferential direction in order to allow for deformation of said sleeves during clamping thereof.
1 more element
Dependencies are inferred from the claim text.