Metal fusion bonding – With means to deform work – filler – or flux portion before... – Comprising means forming one-piece blank into a tubular shape
Patent
1994-07-28
1996-03-12
Heinrich, Samuel M.
Metal fusion bonding
With means to deform work, filler, or flux portion before...
Comprising means forming one-piece blank into a tubular shape
228151, B21D 5126, B23K 3704
Patent
active
054979358
DESCRIPTION:
BRIEF SUMMARY
The present invention is in the metalworking field and has as its subject matter an automatic machine for the continuous production of ferrules from a stack of flat metal blanks.
A publication, FR2637206, by the applicant, has disclosed a machine, called a "rolling machine," having centering wheels enabling it to adjust in a precise manner to the rolling diameters; the description of this machine mentions that it is adapted to be associated with welding means.
Also known from the applicant's older publication, viz., FR2528335, is the association of a sensor with a machine for the purpose of measuring the thickness of the metal blanks before they enter the machine, this sensor having a direct mechanical action on the bending wheels so as to adjust them to the required rolling diameter.
The latter machine, however, was not designed to be associated with an automatic welding machine, and so the relatively imprecise action of the thickness sensor was satisfactory.
A first purpose of the invention is to propose an assemblage, called a "line," of means permitting metal blanks within thickness tolerances and of identical dimensions to be held, rolled and welded automatically (i.e., normally without human intervention).
To understand the technological background of the invention, publication EP 0426258 (THOMASSEN) may be consulted, which describes a machine of this kind, comprising mainly means for bending the blanks, means for the discontinuous transfer of the bent blanks, and welding means.
A problem of this machine is that the edges of the blanks are resistance welded overlapping one another; the applications of the ferrules obtained are limited for safety reasons since their strength is not sufficient to permit them to accommodate, if necessary, a product under pressure.
Also, a second purpose of the invention is to propose a machine satisfying the first purpose mentioned, permitting the butt-welding of the rolled blanks in order to render the ferrules obtained capable of accommodating products under pressure.
The problem to be solved for the purpose of satisfying the second purpose is how to hold the rolled blanks in a position permitting them to be welded, while on the one hand holding the edges together, and on the other hand keeping the end surfaces parallel.
It must be noted that, to satisfy both of these purposes, the common problem to be solved is to be found in the means for transferring the blanks from the rolling station to the welding station.
According to the invention, a machine for the automatic production of cylindrical ferrules from metal blanks, which are to be welded with their edges joined, i.e., "butt-welded," said machine preferably comprising a roller of the fluted roll type as described in the applicant's publication FR2637206, is characterized mainly in that it comprises the following, in an order beginning from the point of exit of the ferrules and going back to the point of entry of the blanks: the transfer of a rolled blank in a shape with its edges abutting and assuring that this shape will be maintained, and means, called the second means, for forming a continuous welded seam along said abutting edges, station, provided with means, called the third means, for moving the rolled blanks on their longitudinal axis, and means, called the fourth means, simultaneously providing for the progressive constriction of the blank, so that, when it reaches the entry of the welding station, it will be in a shape in which its edges are abutting, means, called the fifth means, for moving a blank along its axis, to above and from the stack, called the sixth means, or "pickers," and for transferring the blanks one by one from a stack to the entrance to the roller, and a servomechanism for the fine control of the bending means taking into account the thickness of each blank to assure the precise attainment of the diameter of the rolled blank with a precision on the order of a millimeter.
From the assemblage of these means the result is that metal blanks of ordinary thickness tolerance can be rolled and
REFERENCES:
patent: 4824007 (1989-04-01), Depaoli et al.
Heinrich Samuel M.
Jammes Industrie S.A.
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