Flash welding installation
AssigneeVau Clecim
InventorsJean-Luc Legoupil, Pascal Gobez
Life of this patent
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Abstract
The invention relates to an installation for welding metal bands comprising two retaining members (2, 2′) for the ends of both bands, mounted respectively on a fixed frame (1) and a mobile frame (1′), means for shearing both facing parallel edges (m1, m2) on the ends of both bands (M1, M2) and electric power supply means (3) for flash butt welding of the said bands. According to the invention, the electric power supply means of both bands comprise a direct current generator (3) connected to continuous modulation means (34) of the voltage applied between the retaining members (2, 2′) in relation to the sizes of the bands (M1, M2) in transversal section and according to the nature of the metals to be welded.
Claims11
An installation for flash butt welding of metal bands running successively along a longitudinal axis on an average plane that is substantially horizontal, said installation comprising:
- a fixed frame centred on a running axis of the bands and on which is mounted a first two-jaw retaining member for clamping a downstream end, in a running direction, of a first band;
- a mobile frame centred on the running axis and movable parallel to said axis with respect to the fixed frame, wherein said mobile frame carries a second two-jaw retaining member for clamping an upstream end of a second band following the first band,
- said first and second band having facing parallel edges, respectively downstream and upstream, wherein each edge is shorn at a preset cantilever distance with respect to the corresponding clamping jaws;
- means for controlling a displacement of the mobile frame toward the fixed frame in order to bring the edges of both bands closer to one another;
- a direct current generator with two poles connected respectively to said first and second retaining members of the bands;
- and
- means for continuously modulating a voltage applied between the first and second retaining members, in order to ensure regular formation of sparks for flash butt welding of the bands, by modulating the voltage to account for various sizes of the bands in a transversal section and to account for a type of metals to be welded.
Dependencies are inferred from the claim text.