Chennai, India
Chennai, India

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An ergonomic welding arm (1) includes a plurality of arm links (14, 20, 24) coupled by a plurality of joints (12, 18, 22). Each of the plurality of joints (12, 18, 22) is configured to allow the plurality of arm links (14, 20, 24) to be rotated about an axis with respect to a directly adjacent arm link (14, 20, 24). A first end of the welding arm (1) is configured to engage a support (4) for supporting the welding arm (1). A second end of the welding arm (1) is configured to engage a welding torch (10).


An ergonomic welding arm (1) includes a plurality of arm links (14, 20, 24) coupled by a plurality of joints (12, 18, 22). Each of the plurality of joints (12, 18, 22) is configured to allow the plurality of arm links (14, 20, 24) to be rotated about an axis with respect to a directly adjacent arm link (14, 20, 24). A first end of the welding arm (1) is configured to engage a support (4) for supporting the welding arm (1). A second end of the welding arm (1) is configured to engage a welding torch (10).


Patent
Esab Ab | Date: 2014-07-10

A welding fixture for securing workpieces during welding. The welding fixture may include a movable gantry that is configured to span over the workpieces. The welding fixture may further include a plurality of pressure units that are suspended from the gantry and that are configured to controllably apply a force to the workpieces during welding. The gantry may be moved over the workpieces in a welding direction while pressure units maintain a force on the workpieces and while welding heads that are positioned behind the pressure units weld the workpieces together.


Patent
Esab Ab | Date: 2012-08-14

The invention relates to a method for submerged arc welding comprising the steps of guiding a first hot wire (4; 4a, 4b) towards a work piece and guiding a cold wire (22; 22a, 22b) at a variable feed speed. The method further comprises the steps of continuously measuring, during a welding phase, at least a first active welding parameter related to at least said first hot wire (4; 4a, 4b) adjusting the cold wire (22; 22a, 22b) feed speed in dependence on at least first active welding parameter variations, to maintain high welding stability and high weld quality. The invention also relates to a system (9) for carrying out the method. The system (9) comprises hot wire feeding means (150) for feeding a first hot wire (4; 4a, 4b) towards a work piece and cold wire feeding means (35) for feeding a cold wire (22; 22a, 22b) at a variable cold wire (22; 22a, 22b) feed speed and a control unit (31) for controlling the second wire feeding means (35). The system (9) also comprises measuring means (27) adapted to continuously measure at least a first active welding parameter related to said first hot wire (4; 4a, 4b). The control unit (31) determines target values for the cold wire (22; 22a, 22b) feed speed, each target value corresponding to a first active welding parameter value and controls said second wire feeding means (35) to adjust said cold wire (22; 22a, 22b) feed speed to said target values.


Support device (20) meant to bear in supporting fashion on one or more work pieces in connection with friction stir welding, comprising: The invention also provides a backing arrangement comprising such a support device.


Patent
Esab Ab | Date: 2011-12-20

A contact tip (1) for gas metal-arc welding comprising:


A method comprising an arc ignition phase (IP), an arc-stabilizing phase (AP) and a stable arc phase (SP). The arc stabilizing phase comprises an initial sub-phase (IS) comprising the step of feeding at least one hot wire (4, 12) at constant feed speed and a main sub-phase (MS) comprising the steps of feeding said hot wire at constant feed speed and feeding at least one cold wire (22) at constant feed speed. The stable arc phase comprises the steps of continuously adjusting the feed speed of the hot wire and continuously adjusting the feed speed of the cold wire. The invention also relates to a welding apparatus (1) for carrying out the method. The welding apparatus comprises a hot wire feeding means (150), a contact means (2), a cold wire feeding means (35) and a control unit (31). The control unit is adapted to control said hot wire feeding means to feed the hot wire at a constant feed speed during the initial sub-phase, feed the hot wire at a constant feed speed during the main sub-phase and to continuously during the stable arc phase adjust the feed speed of the hot wire. The control unit is adapted to control said cold wire feeding means to feed the cold wire at a constant feed speed during the main sub-phase and continuously during the stable arc phase adjust the cold wire feed speed.


Patent
Esab Ab | Date: 2012-02-09

Backing arrangement (2) for supporting a welded seam extending on a curved path which is formed between two curved work pieces by friction stir welding with a welding tool separate from the backing arrangement, which backing arrangement comprises a backing body (20) which is intended to bear upon the work pieces opposite said welding tool to assume at least a part of the compression force that is exerted by the welding tool against the work pieces to keep the material plasticized during the welding operation in the area of the welded seam. The backing body is equipped with a shoulder (21) which exhibits a bottom surface (22) turned outward, via which the backing body is equipped to bear on the work pieces. A driving mechanism (50) is situated to rotate and/or oscillate the shoulder so that the bottom surface of the shoulder can thereby be made to carry out a rotating and/or oscillating motion against the work pieces for creating fictional heat in them.


Patent
Esab Ab | Date: 2015-10-15

A twin wire welding apparatus including a first contact tube for guiding a first consumable electrode toward a weld puddle and transferring welding current to the first consumable electrode, a second contact tube for guiding a second consumable electrode toward said weld puddle and transferring welding current to the second consumable electrode, and a single power source connected to said first and second contact tubes for providing the same potential to said two consumable electrodes, and a method for operating such an apparatus.


The present application relates to an electric arc welding method to be used with an arc welding arrangement (1) comprising a first power source, a first electrode (2) connected to said first power source, and a second electrode (7), said first electrode (2) being adapted to generate a weld pool (28) via a first electric arc present within a first arc region (31) and said second electrode (7) being adapted to generate said weld pool via a second electric arc present within a second arc region. The first electrode (2) is operated at welding parameters adapted to maintain said first arc ignited. The second electrode (7) is operated at welding parameters adapted to ensure that excess energy from at least said first electrode (2) is required to maintain said second arc ignited. The method comprises the step of feeding said second electrode (7) so that it is allowed to consume excess energy from said first electrode (2) to maintain said second arc ignited. The invention also relates to an arc welding arrangement (1) for carrying out the method.

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