DEP0052565DA - Arrangement for operating a portable resistance welding device - Google Patents

Description

Walter J, Gladitz, Augsburg, Pferseerstr.

P 52 56WG 34 836 a ingg »20.8..49, 9 o'clock

Arrangement for the operation of a portable

Resistance welding machine »

It is known that, in the case of portable resistance welding devices, the necessary high amperage is generated to arrange the transformer used for low voltage separately from the device. The «wi & @ tor @ 3ä welding machine and transformer connecting Cables require extremely thick cross-sections, which make handling the welding device very difficult. Amounts to the welding power e.g. 24 kVA, 8ooo amperes are to be transmitted with a voltage of 3 yoIt, that with an approved one

ρ Q

Current strength of Io ampere / mm require a cross-section of 8oo mm.

That is why the transformer has already been arranged on the welding machine itself. But that has other downsides, namely, a considerable increase in the weight of the devices, which from certain transformer capacities onwards are unacceptable and the presence of such a high voltage on the device (namely on the primary side of your transformer) that it is suitable for human contact is dangerous and must therefore be carefully isolated »

According to the object on which the invention is based, the advantages of one type and the other are to be combined with one another, However, without having to accept their respective disadvantages, Diea is according to the invention by a new j * for operating a portable resistance welder

■ f achieved with a transformer arranged on it, in which the

The primary side of the transformer is operated with a voltage which is not dangerous to human contact but which is a multiple of the welding voltage. In one arrangement lem ^ the mains voltage

through an intermediate transformer separated from the welding device to the primary voltage of the transformer arranged on the welding device reshaped. This voltage can be 40 volts, for example

_ 2 -

and in the example assumed above would require a cable cross-section of 24,000 ι 4o: Io = 600: Io = 60 mm. Such a cross section can easily be accommodated in a slightly flexible cable. The transformer arranged on the welding machine is lighter because it can be implemented without particularly strong insulation, since there is no voltage on the primary side that could be dangerous for human contact.

For this reason, the transformer arranged on the welding device can now also be designed as a so-called autotransformer, the secondary winding of which coincides with several primary windings: gäl4 * / 8000 - 6oo = 74oo Impere to be measured.

Furthermore, the low voltage of B.B. 4o volts a direct contact with water and thus a higher current load the cross-sections, which results in a-hstr smaller cross-sections of the services and thus weight reductions. the Primary windings of the transformer arranged on the welding device are therefore in accordance with a further development of the concept of Irfindungsgedank of Pipes through which water flows. The water is routed through the power supply and discharge lines between the intermediate transformer and Hoses surrounding the welding machine transformer, which has the advantage that only two connecting strands are present. Also the Secondary windings of the intermediate transformer can have water flowing through them so that this is also cooled water flows through the secondary windings of the transformer arranged on the welding machine or this transformer be completely surrounded by water.

The intermediate transformer can be stationary; expediently, it is also mobile and has taps for voltage regulation, thus further simplifying the welding machine transformer.

An embodiment of the invention is shown in the drawing.

From the Hetz / ii 1, the primary side of an intermediate transformer is controlled by a welding or stepping time regulator 2 fed, the secondary side 4 has a voltage of about jt 2o to

YoIt receives. 2wis-efe @ HH-ite and <§re ¥ primary side 5 of the welding machine transformer connect light wire ropes 6. which are without insulation

i lation lie in rubber hoses 7, through which water flows. The "at 8 supplied and discharged water also flows through the copper pipe secondary windings 4 of the intermediate transformer 3 and primary windings 5 and secondary windings 9 of the transformer arranged in the welding device Io. Taps 11 on the primary side of the intermediate transformer 3 enable voltage regulation Pliers, a hand puncher or a hand stitching machine are used that are easy to move despite the high welding performance »

The transformer on the welding device can of course also be designed for higher frequencies, for which the invention The cooling options offered have a particularly favorable effect.

Claims (9)

Patent claims. 1) - ^ e ^ fetereh to operate a portable resistance welding device with a transformer arranged on it, thereby characterized that the primary side of the transformer with a harmless to human contact, but the multiple the voltage corresponding to the welding voltage is operated « 2) arrangement z ^^^^ w. ^ Eto ^ feK ^ ag ^ .Ae ^ - ^ ertlÄ ^ eas- according to claim 1, characterized in that the mains voltage by one of the The intermediate transformer separated from the welding machine is converted to the primary voltage of the transformer located on the welding machine will. 3) arrangement according to claim, 2. characterized in that the secondary winding ^ »of the transformer arranged on the welding device assemble with one or more primary turns · * ^ all 4) arrangement ^^^^^^^ xQunam & ^ ABB ^ Ms ^ E ^ xi ^ is-n & oh claim 1, characterized in that the primary turns of the transformer arranged on the welding device are bores through which water flows. 5) Arrangement according to claim 4, characterized in that the water flow through the current supply and discharge lines between the intermediate transformer SchSämche surrounding the welding machine transformer. 6) Arrangement according to claim 4, characterized in that water also flows through the secondary turns of the intermediate transformer are. 7) Arrangement according to claim 4, characterized in that the secondary windings of the transformer arranged on the welding device are flowed through by water or this transformer is completely surrounded by water. 8) Arrangement according to claim 2, characterized in that the intermediate transformer is movable. 9) Arrangement according to claim 2, characterized in that the intermediate transformer has taps * for voltage regulation.