DD148023A1 - CLAMPING DEVICE ON WELDING TABLES - Google Patents

Abstract

The invention relates to a clamping device on Schweisztischen which is fixedly mounted on these and for the Schweisztisch simultaneously bearing and determining element, wherein the determination and clamping of relatively thin, substantially ganzflaechigen sheets having different shapes and dimensions is relevant.Da conventional clamping devices only certain, can assume their clamping positions due to their construction, the task is to find a clamping device in which the clamping position can be changed without assembly or disassembly of clamping elements. The invention arranged on the Schweisztisch clamping device consists of several successive rows of vacuum chambers, which are arranged offset from one another and are connected by hose hoses provided with a Vakuumvorratsbehaelter vacuum pump and a connected vacuum pump, which has a solenoid valve control. The invention solution is particularly suitable for clamping workpieces, especially of relatively thin, substantially ganzflaechigen sheets with different shapes and dimensions.

Description

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B 23k 37/04

Tensioning device at welding tables Field of application of the invention

The field of application of the invention extends to a clamping device on welding tables, which is fixedly mounted on this and for the welding table is simultaneously support and destination element. A special field of application is the determination and clamping of relatively thin, substantially full-surface sheets of different shapes and dimensions.

Characteristic of the known technical solution

Hand-operated or pneumatic toggle clamps are known from the catalog "Standardized devices" 17/67, which are equipped with a pivotable clamping arm and must be firmly mounted on the welding table.

Furthermore, hydraulic clamping cylinders are used for the production of special devices in which the pressure from the pressure generator is transmitted through a hose line in a clamping cylinder mounted on the welding table. The pressure then acts via a spherical pressure piece on a complete clamping iron

 The clamping devices described have the drawback that they, since they are firmly mounted on the welding table

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must be due to design only certain clamping positions can take. Thus, the exciting range of parts is significantly limited and the possibility of a re-tensioning of the workpiece to continue the welding process largely st ruled out, so that the jigs can find in a particular positioning essentially only for single-purpose voltage application. Necessary conversions hinder the swift expiration of the welding work and cause force and expenditure of time. '

Object of the invention

The aim of the invention is to be achieved that with a fixedly mounted on the welding table clamping device a wide range of thin, substantially full-surface sheets can be determined and clamped with different shapes and dimensions.

Presentation of the invention

The causes of the identified in the characteristic of the known technical solution defect are due to the construction of the known, fixed to the welding table fixtures since their clamping means can only assume certain clamping positions. To eliminate the defect and its causes, the invention has for its object to provide a clamping device to welding tables for relatively thin, substantially full-surface sheets, with a wide range of parts of various dimensions and shapes when changing the clamping positions without assembly or disassembly Clamping elements can be clamped.

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Erfindungsgeraäß this is achieved in that on each conventional welding table, a clamping device for determining and clamping of sheets of different shapes and dimensions can be arranged. The tensioning device according to the invention consists of several successive rows of lower, pressure chambers, which are arranged offset to one another and are connected via hose lines provided with vacuum lines with a vacuum reservoir and a connected vacuum pump with solenoid valve control. The vacuum chambers each consist of a with the support surface of the welding table plan concluding and firmly connected to this body. This has a recess for mounting

15'nähme and securing a rubber sleeve, which is cup-shaped and open to the support surface of the welding table and arranged in the untensioned state with protruding bead-like attack surface.

An arranged in the main body intake, whose Purchlaßöffnung connects the cavity between the workpiece and vacuum chamber with a connection opening for the vacuum line is also formed by its special shape as a holder and seal for the rubber sleeve and provided to the support surface of the vibrating table with a protective grid. When clamping the workpiece in its position, the unused vacuum chambers are turned off by means of hose taps and sucked by switching on the vacuum pump from the cavity between rubber sleeve and workpiece, the air so that caused by the induced suction and the atmospheric pressure acting on the workpiece the same on the Surface of the welding table is pressed and thus tensioned.

After the welding of the workpiece, the solenoid valve control initiates the aeration and releases the vacuum.

embodiment

The invention will be explained in more detail with reference to an embodiment shown in the drawing

 In the drawing shows

1 shows an example of a welding table equipped with a tensioning device according to the invention

Pig. 2 a vacuum chamber of the inventive clamping device

For arranging the clamping device according to the invention for relatively thin sheets are in the tabletops conventional .Schweißtische 1 arranged in several successive rows lying rows offset holes with counterbore for receiving vacuum chambers 2, dede the vacuum chambers 2 has a flat with the support surface of the welding table 1 and on this firmly mounted base body 3 m this is centrally introduced for receiving and securing · a rubber sleeve 4 correspondingly shaped recess

 The rubber sleeve 4 is cup-shaped and open to the support surface of the welding table 1 and arranged in the untensioned state with protruding, bead-like attack surface.

Due to the special Pormgebung a mounted in the base 3 intake 5, the rubber boot is held in place and sealed.

The passage opening of the intake 5 is provided to the support surface of the welding table 1 with a protective grid and opens on the other hand in a connection opening 7 of the base body 3 for fixed installation of provided with hose taps 9 Yakuumleitungen 8, which retains vacuum supply he 10 and a connected vacuum pump 11, the When the vacuum pump 11 is switched on, a vacuum is created in the cavity between the workpiece and the vacuum chamber 2 so that the suction effect and the atmospheric pressure acting on the workpiece press it onto the surface of the welding table 1 and thus is stretched, with the bead-like

1.5 attack surface of the rubber boot 4 is pushed back and flush with the bearing surface of the welding table.

After the welding processing of the workpiece / is initiated via the solenoid valve control 12, the ventilation and released the vacuum voltage.

Since due to the different dimensions of Y / erkstücke not all vacuum chambers 2 are required for each clamping operation, a separate connection or disconnection of the vacuum chambers 2 via hose taps 9 is possible.

The vacuum voltage according to the invention has the advantages that

- With the firmly mounted on the welding table clamping elements without their assembly or disassembly a large range of parts can be clamped to sheets of various shapes and dimensions.

- By reducing the time required for the clamping process, a huge increase in labor productivity is achieved and work difficulties are eliminated.

Claims (5)

invention claim 1 / β » 1. clamping device on welding tables for determining and clamping of sheets of different shapes and dimensions, characterized in that in welding tables (1) in several consecutive rows vacuum chambers (2) offset from one another and provided with hose taps (9) vacuum lines (8) with a Vacuum .vorratsbehälter (10) and an attached 'nen vacuum pump (11), which has a solenoid valve control (12) are connected. 2. Clamping device according to item 1, characterized .dadurch in that the vacuum chambers (2) each consist of a with the support surface of the welding table (1) flush and firmly connected to this base body (3) having a recess for receiving and securing a rubber boot (4) and in which an intake pipe (5) whose passage opening connects the cavity between the workpiece and the vacuum chamber (2) with a connection opening (7) for the vacuum line (8) is arranged. 3. Clamping device according to item 2, characterized _T net characterized in that the rubber sleeve (4) is cup-shaped and the support surface of the welding table (1) is open and arranged in the untensioned state with protruding bead-like attack surface. , , , ' 4. Clamping device according to item 2 and 3, characterized in., That the intake ' (5) is designed as a holder and seal for the rubber boot (4). 5. Clamping device according to item 2 and 4 »g e characterized in that the passage opening of the intake manifold (5) to the bearing surface of the welding table (1) with a protective grid (6) is provided.