DE110169C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

According to the present invention, tubes made of iron or other metal plates are made manufactured which are cheaper and better than the known cast or riveted tubes are. The tube is made from one or more, preferably two, plates bent together manufactured, and the invention relates to the union of the edges of the in a known manner curved plates to close the pipe tightly and tightly. The union takes place ' with the aid of an intermediate piece, 1 a locking bar, which are inserted between the edges to be united, and by suitably shaping the edges in such a way that they are light, firm and tight with the Closing bar can be combined. The sheet metal edges respectively. the one drawn on the edge Strips are thickened for this purpose and preserved through Compression of an approximately dovetail-shaped cross-section, the broad side of which follows lies outside. The locking bar has an approximately H-shaped cross section. The Nuthen in this locking bar, are of the same width as the thickest part of the sheet metal edge, and this edge is pushed completely into the groove. . ;

Then the legs or edges of the grooves are bent inwardly so that they close with their inside close to the Place the flanks of the two dovetail-shaped sheet metal edge pieces and secure them in this way; and stick together.

The machine necessary for this is a Punch or press. The prepared pipe, the sheet metal pieces and the Connecting rods held together in the correct position, inserted and 'after Advancing the work moves forward. So the locking bar becomes a little after the others bent from one end to the other over the sheet metal edges and at the same time tightly pressed on them.

The compression is brought about by two dies at each work site, so that in the case of two connecting rods, there must be four of them, two from outside, from up and down, sit on the locking bar, and two, which from the inside of the tube, by radial movement outwards, fold down the inner flanks of the locking bar. Both are made by hydraulic pressure -emotional.

This machine is shown in the accompanying drawing illustrates, namely shows: ■

Fig. Ι the side view and

Fig. 2 the rear view,

3 shows a view, partly from the side, partly in the middle vertical section, Partial view of the inner counter-holder on an enlarged scale.

Figure 4 is a section through the pipe at work with the dies in view.

Fig. 5 shows the shape of the locking bar and sheet metal edge before starting work. ·
Figure 7 is a side view of the tube.

The press consists of the foundation A, which is connected to the bridge A- by the columns A ¹ A '. This carries the anvil or the die B ₁ while the foundation with the hydraulic cylinder> C is provided with the Prefskolben c ¹ , which is a

SSfP

Claims (1)

the same dies or stamps ² carries. These dies are recessed in a cylindrical manner, corresponding to the cross-section of the connecting rods after they have been pressed together. '' .. '■■ The assembled tubular body is inserted between the two dies B c ² (Fig. 4), which is gradually moved axially forward in any desired manner, and whose parts, ie two semi-cylindrical sheet metal pieces and two connecting rods D, are somehow held together, e.g. B. by. Split rings Z with connecting bolts Y and pricks X (Fig. 6). :> · Inside the tube are the internal dies GG ¹ , which face B c ' ² and interact with them. These dies are movable in such a way that they move outwards towards the locking bar (Fig. 5) and attach themselves firmly to it, but after the work they go back again so that the tube can be pushed forward over them. For this purpose, these dies are mounted radially displaceably in cutouts of a hollow mandrel E and are supported with their inner surface / 1 on an axially movable solid mandrel H, which has different diameters at different points. Can be These are connected i through the drill Λ ^{1/1 3} BR ² BR ² and a crosshead connected to the hydraulic piston / piston rod so as thereby DAF a strong train on the linkage and a corresponding 'pressure on the dies GG ¹ exercised, which serve as an inner counter-holder when closing the closing line. This is effected by the hydraulic piston c ¹ after the internal dies have been adjusted. Then the two hydraulic pistons are withdrawn and the tube is freed for advancement! which is a few centimeters each time. The mandrel E _(be fixed as desired, eg in the stands FF. Patent claims: An embodiment of the known method for making tubes from bent metal plates by joining their edges by connecting rods, thereby marked, dnfs the plates and rods in the cold state step by step between Pressing pushed through and through the same the flanges of the locking rods. on the dovetail-shaped ones Edges of the sheets, expediently using hydraulic pressure \ be transferred. , 2. To carry out the method according to claim ι a machine for simultaneous. Closing of two opposing locking bars, characterized in that the locking is carried out by a hydraulically moved punch and a fixed anvil from the outside and two counter-dies (GG ¹ J , radially movable in a hollow mandrel, which are each time firmly placed on the inner surfaces of the locking bar before work . 3. An embodiment of the machine according to claim 2, characterized in that the counter dies (GG ¹ J with their inner surfaces rest on a solid mandrel (H) provided with inclined planes, which is driven by a hydraulic piston in the axial direction of the cathedral can be moved. 1 sheet of drawings.