Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D51/00—Making hollow objects
  • B21D51/16—Making hollow objects characterised by the use of the objects
  • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
  • B21D51/2676—Cans or tins having longitudinal or helical seams

Definitions

• the present invention is in the field of metallurgy and it relates to an automatic machine intended to produce continuously, from a stack of flat sheets, cylindrical ferrules.
• rolling machine having bending rollers allowing it to be adjusted precisely to the rolling diameters; the description of this machine mentions its ability to be associated with welding means.
• a first object of the invention is to propose a set, known as a "line", of means, allowing handling, rolling, and automatic welding, that is to say normally without human intervention, of sheets which are dimensionally identical, apart tolerance, thickness.
• a line of means, allowing handling, rolling, and automatic welding, that is to say normally without human intervention, of sheets which are dimensionally identical, apart tolerance, thickness.
• a disadvantage of this machine is that the edges of the sheets are welded by resistances overlapping each other; the applications of the cylinders obtained are limited for safety reasons, their resistance not being sufficient to possibly receive a product under pressure.
• a second object of the invention is to provide a machine which meets the first object mentioned, allowing welding with joined edges of rolled sheets, in order to make the cylinders obtained suitable for receiving products under pressure.
• the problem to be solved in order to achieve the second aim lies in maintaining the rolled sheets in a position allowing their welding, on the one hand by having the contiguous edges and on the other hand, in particular for thin sheets, by having the parallel end faces.
• a machine for the automatic production of cylindrical ferrules from sheets intended to be welded with their contiguous edges, called "edge joints”, the said machine preferably comprising a rolling machine of the crenellated roller type of the type described by the publication FR2637206 of the Applicant, is mainly characterized in that it comprises, in order from the exit of the ferrules to the entry of the sheets: a welding station provided with means, called prime, authorizing the transfer a rolled blank having a conformation with contiguous edges, and ensuring the maintenance of this conformation, and means, known as second, of continuous formation of a weld bead along said contiguous edges, - at least one station, said of continuous transfer and tightening, provided with means, called third, ensuring a transfer along their axis longitudinal of the rolled blanks, and of so
• the rolling station constituted by a roller rolling machine of the aforementioned type, and a supply station for the rolling machine provided with destacking means, called sixths, or “destackers", and for transferring the sheets one by one from a stack up to the entry of the rolling machine, and of a fine adjustment servomechanism of the bending means taking into account the thickness of each sheet to ensure precisely obtaining a diameter of the rolled sheet with a precision of the order of a millimeter.
• first of all the so-called fifth means are means for moving a blank each time a previously blank moved was introduced into the continuous transfer station, and bring the blank in axial support against the blank which preceded it in the post, and secondly said third means ensure the transfer of the blanks while pushing 1 ' blank present in the welding station.
• the additional transfer station is intended to reduce the stroke of the pusher of the discontinuous transfer station in order to authorize a maximum speed of advance of the ferrules in the welding station, the pusher being intended to drive a blank for the put in contact with the previous blank, while the latter is still present in the continuous transfer station and is being welded.
• the blanks are suspended in suspension by the web along the discontinuous transfer station by means of a double plurality of pairs of rollers between which the blanks circulate, the rollers of each pair being arranged on either side of the veil, one of the pluralities being located outside the blanks and the other being located inside the blanks; alternatively, the blanks could be supported by an elongated cylindrical core connected to the machine frame by the web.
• the frame is composed of a plurality of separable elements linked together, each element supporting a respective station.
• FIG.l is a block diagram of the various main components of a machine of the invention, including two alternative embodiments
• Fig.2 is a simplified perspective view of a machine of the invention according to a first variant of the invention, more particularly intended for the development of ferrules from thick sheets
• FIGS. 3 and 4 are schematic representations of a discontinuous transfer station of the invention, respectively in perspective and in end view
• fig.5 and 6 are schematic representations of a continuous transfer station of said first variant, respectively in perspective and in end view
• fig.7 is a schematic perspective view partially broken away of a station welding of said first variant
• FIG. 8 is a schematic perspective view partially cut away of a welding station and a continuous transfer station according to a second variant of the invention, more pa rticularly intended for the development of ferrules from thin sheets.
• a ferrule production line in general comprises mainly five stations, namely, and in the direction of travel of the treated material, a supply station 2, a rolling machine 4 with crenellated rollers (FR2637206), a discontinuous transfer station 6 with a pusher forming the so-called fifth means, a continuous transfer station 8 provided with so-called third transfer means and so-called fourth tightening means and finally a welding station 10.
• the discontinuous transfer station 6 comprises, on the one hand the said fifth means and on the other hand an additional transfer station 7, type with motorized rollers for example, possibly intended to limit the stroke of the pusher, as will be explained later.
• the supply station 2 mainly consists of a transfer path 20 for a carriage 22 with suction cups 24 with the function of destacker of the stacked flat sheets 26, and that the welding means 28 are arc welding type with support 104 (fig. 7) or 106 (fig. 8) and electrode 108.
• a support and guide web 30 extends from the exit from the rolling station 4 to the welding station 10 along the discontinuous and continuous transfer stations 6.
• the edge joints of the blanks are separated and guided by the veil 30 along which they can circulate, said veil 30 tapering from the exit of the rolling station 4 to pass for example from 12 mm to 1.4 mm, for sheets of a thickness between 1 and 5 mm , and from 12 to 0.2 mm for sheets with a thickness of less than 1 mm.
• the discontinuous transfer station 6 comprises a pusher 32 movable in a round trip along the sail 30 to move the blanks 1 in one direction from the rolling machine 4 to the continuous transfer station 8.
• the pusher 32 comprises a carriage 34 circulating along the web 30 by pneumatic means, such as a horizontal cylinder not shown.
• the carriage 34 supports a push finger 36 retractable by a jack 38; the finger 36 is either retracted during the "return” movement, or in the working position during the "go” movement.
• the stroke of the carriage 34 is controlled by a control cabinet not shown.
• the continuous transfer station of FIGS. 2, 3 and 4 is also applicable to the second variant, with four fingers (fingers 80, fig. 8) respectively taking support on either side of the blank in its lower zones and upper, in order to best maintain thin ferrules so that their end faces are in parallel planes; the four fingers are retractable laterally to allow the carriage 34 to return to the outlet of said additional transfer station 7.
• the third means, of continuous transfer consist of a double plurality 40 and 42 of rollers, the rollers of the first plurality 40 being located outside the blanks and being drive rollers pressurized against those of the second plurality 42, these being located inside the blanks.
• the drive rollers 40 are driven by drive means comprising a pinion 44 and transmission means 46 called "gimbal".
• the diameter of the drive rollers 40 located at the entrance to the continuous transfer station 8 is slightly greater than the diameter of the drive rollers 40 succeeding them: any spacing between two successive blanks is thus caught up, due to this difference in diameter.
• the internal rollers 42 have a flange 48 emerging between the edges of the blanks in the extension of the web 30 for the guidance of the latter.
• the variations are discontinuous, which corresponds to bearing cams, with manual variation means:
• the means with a cam function comprise jacks, such as 56, the rods 58 of which are respectively connected to the bars 50, the stroke of the jacks 56 being limited by means of a set 60 of intervertable stops 62: the stops 62 are supported by a hoop 64 which can pivot around the axis of said envelope 54 so as to be placed opposite their respective jack 56 according to the desired nominal diameter.
• the variations could be continuous, which would correspond to a cam, such as a ramp, continuously progressive with motorized variation means.
• a cam such as a ramp
• the first means for edge-to-edge retention of the edge seals during welding, consist of a cage 66 supported by the frame 68 of the machine, said cage 66 being composed of two semi-cylindrical parts 70 and 72, one lower 72 and the other upper 70.
• the lower part 72 is connected to the upper part 70 by elastic means 74 making it possible, despite possible deviations in diameter of the blanks, to bring the lateral edges of the blanks into contact, at the outlet of the continuous transfer station 8.
• each group 78 of rollers 76 extending along a generatrix of the cage 66.
• a cage 67 is similar to the cage 66 shown in fig.7, said cage 66 extending towards the discontinuous transfer station 6, said extension containing the third (40,42) and fourth means.
• the plurality of drive rollers 40 is supported by the web 30 and the plurality of internal rollers 42 is supported by a core 82 itself supported by the web 30, it can be seen in FIG. 8, that the plurality of drive rollers 40 is supported by the cage 67 and is divided into two groups 84 and 86, one 84 supported by the cage 67 in its lower zone, the other 86 in its upper zone.
• the fourth means consist on the one hand by a plurality of groups, such as 90, of pebbles, such as 92, of hyperboloid type, also called “diabolo", said pebbles 92 matching the outer surface blanks 1.
• the groups 90 of "diabolo" rollers 92 are respectively supported by the cage 67 by means of means 94 for adjusting their tangency to said conical surface 54 close to the cylinder. Note that the elastic connection 74 fig.7 between the two upper 70 and lower 72 parts of the cage 67 participates in the fourth means.
• the support participating in the second means can be either a knurl 104, as shown in FIG. 7, or a plate 106, as shown in FIG. 8.
• a nozzle 110 is supported in the upper part 70 of the cages 66 and 67, the said nozzle 110 being equipped with cooling means 114.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Butt Welding And Welding Of Specific Article (AREA)
• Bending Of Plates, Rods, And Pipes (AREA)
• Metal Rolling (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=9426917

Family Applications (1)

Country Status (6)

Families Citing this family (17)

Family Cites Families (9)

• 1992
  • 1992-02-14 FR FR9202060A patent/FR2687336B1/fr not_active Expired - Lifetime
• 1993
  • 1993-02-15 EP EP93905394A patent/EP0625930A1/de not_active Withdrawn
  • 1993-02-15 US US08/256,880 patent/US5497935A/en not_active Expired - Lifetime
  • 1993-02-15 AU AU36353/93A patent/AU3635393A/en not_active Abandoned
  • 1993-02-15 JP JP5513854A patent/JPH07503664A/ja active Pending
  • 1993-02-15 WO PCT/FR1993/000152 patent/WO1993015856A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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