Method and device for welding
AssigneeDanieli & C. Officine Meccaniche SpA
InventorsAlejandro Sanz Lara, Alfredo Poloni
Life of this patent
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Abstract
A welding device for butt welding of bars, blooms, slabs, or billets produced by continuous casting comprises a roller conveyor for simultaneous conveying of at least two bars along a rolling line, jaws for gripping bars, electric power supplies which are set in contact with the surfaces of the two bars, for carrying out a welding operation. The electric power supplies are provided with respective positioning and actuating means, controlled by an actuation device which actuates them independently from one another during setting in contact and detachment of the bars.
Claims14
Welding device, in particular for butt welding of elements of a basically elongated shape, such as bars, slabs, billets or blooms produced by continuous casting, comprising means for the simultaneous conveying of at least two said elements along a processing line, means for gripping said at least two elements, electric power supply means designed to be set in contact with the surface of said at least two elements, to carry out a welding operation, wherein said gripping means and said electric power supply means are provided with respective positioning and actuation means, driven by an actuation device designed to carry out their actuation independently of one another during the operations of setting a contact with and of detachment from the surface of said at least two elements.
Method for butt welding of elements of a basically elongated shape, such as bars, slabs, billets or blooms produced by continuous casting comprising the following steps:
- a) production by means of continuous casting of at least two elements a substantially elongated shape,
- b) conveying of the first of said two elements of a rolling plant with a first feed speed and along a pre-set direction,
- c) conveying of the second of said two elements with a second feed speed higher than the one of the second of said two elements and along said preset direction,
- d) setting at mutual contact respective facing ends of the said two elements, p‘e) blocking of said two elements by means of jaws, set in a first operating position, so as to form a solidal block,
- f) setting at contact electric power supplies with the side surfaces of said two elements,
- g) supply of said electric power supplies with current for a pre-set time, for carrying out mutual butt welding of said two elements and join them permanently making a single substantially elongated element,
- h) detachment of said electric power supplies from said single substantially elongated element,
- i) detachment of the jaws, in a second position operating, from said single substantially elongated element.
Dependencies are inferred from the claim text.