DD216662A1 - RESISTANT WELDING DEVICE IN COMPACT CONSTRUCTION WITH SUBSTITUTED ELECTRODES - Google Patents

Abstract

The invention relates to a resistance welding device in a compact design with electrodes arranged side by side, which operates on the indirect welding method and is used in the entire sheet metal processing industry as a handheld device or in machines used. This device has a small Sekundaerstromkreis, requires by their compact arrangement a low cost of materials, allows an economic use of electrical energy and a small control engineering effort.

Description

Title of the invention

Resistance welding device in compact design with juxtaposed electrodes

Application of the invention

The invention relates to a device, with which steel sheets are connected by "indirect resistance welding". The device is suitable for the entire sheet metal industry, where welds are accessible from only one side, bulky workpieces are welded, and so on Welding sheet metal with large surfaces is necessary «

Characteristic of the known technical solution

In the sheet metal processing industry, among other things, multipoint welding machines are used for joining sheet metal parts, which work according to the indirect welding method. The multi-point welding machines have several disadvantages, such ₈ B ,, is the lateral weld point distance is not varied as desired, and the width of the welded metal sheet is limited by the machine frame "In order to achieve a welding point sequence, the weld between the electrodes must be continuously performed. Through a large secondary circuit welding transformers with high material use he «; Due to the separate arrangement of the transformer and electrodes, no economic use of electrical energy is possible, ie the construction of these machines requires a great amount of control technology.

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Aim of the invention

The invention is to provide a welding device in a compact design with juxtaposed Elaktoden "in which the ^M ängel the goal of the usual welding devices are eliminated and an increase in utility of this device is achieved"

Presentation of "the essence of the invention

The object of the invention is to provide a resistance welding device in a compact design ^ which makes it possible

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To use electric energy more economically. To weld metal parts from only one accessible side and use the device as a handheld device with a large working radius. According to the invention the object is achieved in that the device operates according to the indirect welding method, wherein the electrodes are arranged side by side and the device by the compact design requires only a small Sekundärst romkreis ·

In a housing, a transformer is arranged, wherein in the rear housing part, the primary connections and the front housing part are the secondary terminals. On the secondary side of the housing, the insulating plate is fastened with the welding attachment arranged side by side in a double design. The welding attachment is a hollow electrode shaft, in which a cooling water pipe is assigned. The electrode stem is movably mounted in a guide and the guide is firmly connected to the insulating plate »The electrode is replaceably mounted on the outer end of the electrode stem as a wearing part and the spring housing, in which a pressure spring is located, is fixed to the latter connected. The spring housing is designed so that it goes over the guide to push *.

The welding process is triggered by placing the device with the electrodes on the weld metal. By pressing the electrodes with the insertable into the guide electrode shafts against the compression spring tension in the

Housing pressed, with the spring housing slides over the guide. The pressure must be sufficient to overcome the compression spring force so that the pressure plates at the inner end of the electrode shaft actuate the series-connected control buttons which control the primary-side power supply.

exemplary

The invention will be explained in more detail in the following exemplary embodiment.

The figure shows a schematic representation of the resistance welding device according to the invention in a compact design with electrodes arranged side by side, kept small by the compact arrangement of transformer 2 and 6 of the secondary circuit and thus the material »and energy use is economically exploited» A transformer 2 is in one Housing 1 is arranged, wherein in the rear housing part, the primary terminals 4 and the front housing part, the control, cooling water ·· and secondary terminals 3 are housed «Two adjacent welding fixtures are firmly screwed into threaded holes on an insulating plate 5 made of hard plastic. The insulating plate 5 is bolted to the front of the secondary housing part. 0 @ r welding attachment contains a hollow electrode shaft 7 * in which a cooling water pipe 13 is housed, the electrode shaft 7 is mounted in a guide 10 inserted »At the inner end of the electrode shaft 7 is also made of hard plastic pressure plate attached, which actuates a control button 9 , At the outer end, a spring housing 11 is screwed onto the outside of the electrode shaft 7. In the spring housing 11, a compression spring 12 is housed, with the spring housing 11 pushes on compression of the compression spring 12 via the guide 10. The electrode 6 is exchangeably mounted as a wear part on the outer end of the electrode shaft 7 «For better support, two handles 14 are attached to the handset on the housing 1, they are used for guidance and pressure.

Claims (1)

E r f in d u η gs a ns ρ r u ch 1 »resistance welding device in a compact design with juxtaposed electrodes, which operates according to the indirect welding method, wherein a transformer (2) is in a housing (i) via a respective secondary terminal (3) with an electrode shaft (7) flexibly electrically connected, the electrode shaft (7) is hollow and a cooling water pipe (13) is present in it up to an exchangeable electrode (6), characterized in that an insulating plate (5) is fastened to the secondary housing (1) on the dam side arranged side by side two welding «attachments _e consisting of the electrode shaft (7), at the inner end of a pressure plate (12) is mounted, which actuates a control button (9), where« at the electrode shaft (7) movably inserted into einar leadership ( 10) and the guide (10) fixedly secured in the insulating plate (5), at the other end of the electrode shaft (7) with a Fede rgehäuse (11) firmly connected, the spring housing (11) can slide over the guide (10) and in the spring housing (11) to the electrode shaft a. Compression spring (12) is located. 2 _e device according to item 2, characterized in that the welding device as with handles (11) provided for guiding and generating the pressure hand device or as a Schvueißkopf at machines is possible. 'J'al ·