Method and device for resistance welding and coupling of forces between electrodes

Patent metadata

Field	Value
Publication number	US-10099312-B2
Application number	US-201314397548-A
Country	US
Kind code	B2
Filing date	Apr 26, 2013
Priority date	Apr 28, 2012
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A welding device for joining components by resistance welding includes a pair of electrodes which can introduce an electrode force and an electrical welding current I S1 into the components, at least one further pair of electrodes which can introduce an electrode force and a further electrical welding current I S2 into the components, a power source which can generate the electrode forces, a coupling link which is mechanically connected between the power source and the pairs of electrodes and which can divide a total electrode force that can be generated by the power source into the electrode force and the further electrode force.

First claim

The invention claimed is:

1. A welding device for joining components by resistance welding, comprising:
a double inverter configured to generate a first electric welding current I S1 and to generate a second electric welding current I S2 ,
a first electrode pair configured to introduce a first electrode force and the first electric welding current I S1 into the components,
at least a second electrode pair configured to introduce a second electrode force and the second electric welding current I S2 into the components,
a single source of force configured to generate the electrode forces, and
a distribution linkage which is mechanically connected between the single source of force and the electrode pairs, the distribution linkage configured to divide a total electrode force that is generated by the single source of force into the first electrode force and the second electrode force, wherein:
the distribution linkage is articulated to a first force transmission linkage by a first joint,
the distribution linkage is articulated to a second force transmission linkage by a second joint,
the first force transmission linkage is articulated to a first moving welding electrode of the first electrode pair by a first force transmission joint,
the second force transmission linkage is articulated to a second moving welding electrode of the second electrode pair by a second force transmission joint,
the electrode forces are transmitted by the first and second force transmission linkages,
the single source of force is mechanically associated with the distribution linkage by a distribution joint that is arranged between the first joint and the second joint, and

whereby the first moving welding electrode is mounted so that it is configured to be moved lengthwise by a first linear guide, and the second moving welding electrode is mounted so that it is configured to be moved lengthwise by a second linear guide.

2. The welding device according to claim 1 , whereby the single source of force is configured as a linear source of force.

3. The welding device according to claim 1 , whereby the first electrode pair has the first fixed welding electrode and the first moving welding electrode, and the second electrode pair has the second fixed welding electrode and the second moving welding electrode.

4. The welding device according to claim 1 , whereby a rod of the single source of force that is configured to be moved lengthwise serves to transmit the total electrode force and said rod is articulated to the distribution linkage by the distribution joint.

5. The welding device according to claim 1 , whereby the distribution joint is positioned in the middle between the first joint and the second joint.

6. A method for joining components by resistance welding, involving:
generating a total electrode force by a single source of force, dividing the total electrode force between an electrode pair and another electrode pair by a distribution linkage and, as a result, pressing the components against each other that are arranged between the electrode pairs, wherein:
the distribution linkage is articulated to a first force transmission linkage by a first joint,
the distribution linkage is articulated to a second force transmission linkage by a second joint,
the first force transmission linkage is articulated to the first electrode pair by a first force transmission joint,
the second force transmission linkage is articulated to the second electrode pair by a second force transmission joint,
the electrode forces are transmitted by the first and second force transmission linkages, and
the single source of force is mechanically associated with the distribution linkage by a distribution joint that is arranged between the first joint and the second joint, and

introducing a welding current I S1 and another welding current I S2 into the components via the electrode pairs in order to weld the components by resistance welding.

7. A welding device for joining components by resistance welding, comprising:
a plurality of electrode pairs configured to introduce electrode forces and electric welding currents into the components, each electrode pair of the plurality of electrode pairs having a respective distribution linkage; and
a single source of force configured to generate the electrode forces;
wherein a first side of each distribution linkage is mechanically associated with a moving welding electrode of its respective electrode pair, and a second side of each distribution linkage is mechanically associated with the single source of force;
whereby each of the moving welding electrodes is mounted so that it is configured to be moved lengthwise by a linear guide.

Assignees

• Volkswagen Ag

Inventors

• Voigt Alexander
• Graul Matthias

Classifications

• B23K11/318

  Supporting devices for electrode holders · CPC title

• B23K11/315

  with one electrode moving on a linear path · CPC title

• B23K11/312 Primary

  for several electrodes · CPC title

• B23K11/115 Primary

  by means of two electrodes placed opposite one another on both sides of the welded parts · CPC title

• B23K11/317

  Equalizing; Balancing devices for electrode holders · CPC title