DE1694380U - DEVICE FOR FASTENING A COPPER-PLATED STEEL PIPE ON IRON PLATE BY SPOT WELDING. - Google Patents

Description

20TB50 / 54 Lemga * den-: 13 _V December

for Grebrauehsmusteranmeläung MECJLiTOt "Torriehtung for fastening a copper-plated steel pipe on iron sheet through £ unl £ tschweii3urEg ' ^r · -

The Seijraaehsffiaster "relates to a direction of fooling, for the fastening of a copper-plated steel pipe on a sheet metal base by means of PunfetsehweiSungi it has special difficulties for the Zweok * die. "overcome _y which occur with regard to the very thin copper cover of the steel pipe at the sight and easily lead to a failure or at least a substantial quality.

finishing of the coating, can lead »

The drawing illustrates two embodiments of the Utility model in a semantic representation. Abh.i shows the first form of delivery. through a front view, Fig.2 the associated one Side view. Fig.3 shows the second embodiment through a front view.

, -. You owe them to be fastened on a sheet steel base. iage-it is here-; are τοη small! diameter ^ approximately

'-3 to 12 mm. outside / with a wall thickness of about 03 to 1 mm. They are made of Torrerkupfertem strip steel by longitudinally rolling and rolling over a Born in two layers and then in an electric continuous furnace, surrounded by protective gas,: welded. They Kupfersshicht, the strength at a 2 ^ pad has a thickness t of about 3 to 4 ^ _r goes to the steel a öberflaehliehe, $ edaeh a very firmly adhering Terbindun ^. In a thus constituted Sohr intention Punktschweiäung is einfächen on a _f ie unaltered steel sheet substrate with the

normal

-Z- : I /

normal functional welding procedures cannot be carried out without the Pipe, gate, everything but the plucking, total or partial Destruction falls prey. It is assumed that the two. Separately, the general shape of a pen is used have * with the blunt tip a small one in extension the welded object forms adapted surface.

Instead of this known arrangement, the renewal is in accordance with the positive electrode 2 designed block-like and the surface shape of the tube 2 to be welded adapted so that a larger contact area is created. Against this is the negative Electrode 3 to a kind of blunt cutting edge, something like a narrow knife back, formed and is on the underside of the sheet 4 attached, on the top of which is to be welded Eohr is pressed with theoretically tangential contact.

The advantage of such an S-shape of the electrodes is, that the Eohr -when the electric current passes through the The outside of the bloek electrode is not changed or damaged, because see the amount of electricity on a larger 3? length. distributed and the temperature reached there in the workpiece is proportionate remains low · On the other hand, the current passes through the blade-like electrode 3 in a very small contact area, see above that between tube 2 and base 4 the desired, the copper melting point corresponding welding temperature is reached. Here, however, the heating of the workpiece is so on Immediate point of contact between ear and base covered with water, that on the inside of the pipe the copper layer is only / little affected by melting.

To the

TJM to prevent unfavorable for many uses oxidation of the copper on the inner surface of the pipe, dureii -is this during SehReißverganges inert gas Mndureh- ■ L · · guided. In addition to its deoxidizing effect, it also has a "".

To carry out the two-step process, either a welding tongs can be used for the execution of individual steps on pieces of small size, or, depending on the larger size, a conventional design, in which only the design of the welding electrodes has to be changed according to the invention is otherwise transformed in a known manner Weeiiselstrom. hQheit: efflentsprfe ^ € end; with Eegelung the current durcn a Stuf enselialter used "The Eüalung the Seliwei3elektroden can at einfaenen work with smaller amounts of heat durcn bloSes SintaueiEett happened the electrodes into the water at appropriate -j% ei tab stands * With continuous use of the device Zunct The usual "cooling" finds quantities of heat through which one ends in the hollow jilectons circulating.

In another design of the utility model (Fig. 3), the positive electrode 1 'is arranged close to the point of contact between Bohr 2 "and sheet metal 4, expediently in that the electrode 1 * is insulated from sheet metal 4 by a slimmer sheet zeal, such an arrangement manner is "AEEN path of the current from the positive to the negative electrode as short as feasible ν; to be designed in order to limit the heat development outside of the welding point as much as possible *;

Safety requirements page 4

Claims (1)

W74296M5125 Protection claims: 1. Orientation for fastening a copper-plated steel pipe "on the side by means of point selection _r where a pin-point wire or a pair of pliers with two poles is used for power supply and discharge, characterized in that the strobe supply electrode (1) is a substantially . Larger length of the pipe (2) than is otherwise usual with Pmüctschweißung _r its profile looks snugly, covered, and the current discharge electrode (3) in the form of a blunt edge under the welding point presses the iron plate (4) to be welded against the pipe (2) » 2 »Implementation of the device according to claim 1, characterized in that da3 the power supply electrode (T) is arranged close above the iron sheet (4) to be welded and against this, for example by a mica plate, is insulated.