Electric heating – Metal heating – By arc
Patent
1998-03-20
2000-12-05
Heinrich, Samuel M.
Electric heating
Metal heating
By arc
21912182, B23K 2600, B23K 2608
Patent
active
061569968
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a process and apparatus for cutting and/or welding of sheet metal plates of preferably geometrically differently shaped metal sheets, preferably sheet metal panels of the same or different thickness and straight and/or odd weld seams, and in particular for sheet metal panels of motor vehicle coach work.
Known from EP 0 438 615 A1 is a device for connecting at least two sheet metal plates through at least one weld seam fabricated by a laser beam welding device, whereby pairs of pallets with sheet metal panels lying on them are conveyed side by side on a conveyor unit working in certain cycles and whereby these pallets are moved to a strip-shaped arrest stop and/or ruler where the base side of the sheet metal panels rest against in order to align the sheet metal panels with each other at their front sides and whereby the pallets with the sheet metal panels clamped firmly on them are moved orthogonally to the direction of conveyance of the cycled conveyor unit against each other up to the arrest stop of the sheet metal plate base sides which are to be united by welding. Upon lifting of the sheet metal panels from the pallets the pallets are conveyed back beneath the conveyor track for sheet metal panels through the same conveyor unit to the charging station of the new sheet metal panels.
An essential feature of this known device is that the sheet metal plates to be united by welding are arranged on different pallets and that the pallets must be brought together to allow for uniting the sheet metal plates by welding, whereby the sheet metal plates rise over the pallets in the area of the weld seam so that compression and guide rollers can be located underneath of the weld seam. The movement of both pallets to each other calls for additional facilities and also for time. Moreover the known facility just provides for one conveyance unit mainly running at constant speed for transportation of sheet metal plates lying on pallets from the charging to the discharging station. It does not allow for a continuous transportation of sheet metal plates optimized for gaps, that means running at the smallest possible distance, past the welding device because delays and interruptions are bound to occur on charging and discharging of sheet metal plates on and off the pallets. Furthermore, only weld seams with mainly even or straight run can be fabricated at this status of technology.
Known from DE 33 14 748 C2 is a processing machine for flat workpieces with at least one processing station, among others also for flame cutting of sheet metal panels, whereby workpieces are slideable under a processing station on workpiece sliding devices equipped with retainers. The relevant tools are movable transversely to the sliding direction of workpieces. The sliding devices here serve for transportation of workpieces under and through the processing station. Facilities by which workpieces are conveyed consecutively to the sliding device are not illustrated thereunder.
DE 41 13 295 A1 relates to a device for fabrication of motor car coachwork consisting of a frame rack, a fabrication line, and at least one drum mounted in a pivoting arrangement on a support bed, said drum containing the positioning tools for the car body components. The support bed of the drum here consists of a car which is slideable on a base plate. The problem of a sheet metal plate transportation optimized for gaps, that means at the smallest possible and at a constant distance past the processing installation in the transport direction of the fabrication line is not mentioned thereunder.
Now it is the task of this invention to propose a generic process and a processing installation where those problems outlined at the status of technology do not exist and where sheet metal plates of any shape are firmly positioned on their support bed for processing and where these sheet metal plates are conveyed to the processing station and past them.
The task is solved by providing a plurality of carriers and mounting the plates in a processing position on
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Trumpf GmbH & Co. Aug. 1993 System Component Technician Information.
Heinrich Samuel M.
Thyssen Krupp AG
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