DE358921C - Riveted joint and process for their manufacture - Google Patents

Description

ISSUED
ON SEPTEMBER 16, 1922

CLASS 47a GROUP

(M ₇ 1135 ΧΠΙ47Ο-)

The subject of the invention is a rivet connection by means of countersunk rivets, which is intended in particular for riveting thin sheets, as well as a method for Production of the riveted connection.

It is already known that when riveting thin sheets by means of flat-headed rivets Pull the top sheet into the UnterWech around the rivet hole. On the other hand, at the subject matter of the invention through special shaping of both the retraction of the sheet metal and the rivet via the increase the resistance to shearing out, or the further reinforcement of this increased resistance, i.e. beyond the pure Frictional connection in addition, a kind of tension connection can be achieved, and in such a way that maturation and tension connections are supported or complement each other.

To produce the connection according to the invention, it is advisable to proceed in the manner that first the rivet holes are drilled in the two sheets, and that accordingly the widening caused by the ring trough formation is smaller than the expected rivet diameter. Are on it the Bledhe, if they don't throw at one another in a stubborn manner, to brighten up bad things, and now turn through appropriately shaped

B58921

Provide stamps one above the other with the ring troughs. This applies to two equally thin Sheets. If the wind then pulls in the rivet, then it is not just a press-in process the ring claw of the rivet into the ring trough of the upper plate, but an all-round, Full integration into the remaining open spaces between the inner rims of the two ring troughs, because of the manufacturing process ίο the clamp head compresses the shank of the rivet and maintains the endeavor to expand sideways. A process similar to that of welding is thus achieved which results in a tight but also solid connection because Rivets and sheet metal are welded into one another, so to speak.

When connecting a thin top sheet to thicker bottom sheets, preparation is necessary ao processing and result similar, only that here during the preparation of the thicker lower plate Care should be taken to ensure that a recess suitable for receiving the annular trough of the upper plate is provided in this will. The inner edge of the lower plate can then be used both with the pressing the Rintgwanne of the Oberbledhes pressed inwards as well as afterwards during manufacture the clamp head to be pressed against the ring trough; in any case, the rivet will also here compressed into the resulting gaps and thus a firm, secure connection achieved.

The invention is shown in the drawing. Fig. 1, 2 and 3 are sections through three different embodiments of the invention; Fig. 4 shows the manufacture of the Ring troughs between two appropriately designed punches; Fig. 5 illustrates the rivet profile used.

In the embodiment according to Fig. 1, the upper plate α and the lower plate b have received the necessary drill holes around which the annular trough c is pressed into the upper plate a so that the inner edge of the hole is flanged upwards again and forms an annular claw d . In the same way, the inner edge of the hole in the lower plate b is pulled upwards again from its trough e , so that the ring claw g provided with the drawn rivet f grips behind the claw d in the trough c and, when the rivet head h is compressed, both sheets a _} b presses tightly together.

In the embodiment according to Fig. 2, the lower plate b is thicker than the upper plate o, and the trough e is formed by pulling up the inner perforated rim of the lower plate b . The rivet head h does not grasp here to the same extent as in the embodiment according to Fig. 1, sunk and spanning over the lower plate b, but here the connection is no less firm and tight because the rivet shaft f is also here in the remaining spaces between the inner hole edges of the sheets α and b is compressed.

In the embodiment according to Fig. 3, the tub e is partly through the edge of the hole in the lower plate & ,. partly formed by the rivet; the rivet head h continues to grasp here over the lower plate b.

As can be seen from Fig. 4, the stamps required to form the ring troughs can be very simple. Just as with the finished connection on mutual support, consideration is also given here to the possibility of mutual evasion of the metal sheets to be connected. In the case of the punch i, it is sufficient to create an annular dome k forming the tub, while the punch I pushes up the inner edges through contact surfaces m and is guided in the top sheet α through the dome ». The depth and extent of the ring troughs can change depending on the purpose of the connection, but the overall friction and tension connection that occurs is always retained.

Claims (3)

Patent claims: i. Riveted connection with the top plate sunk into the lower plate, characterized in that the plates (p, b) around the rivet (f, g) are given a ring-trough-like indentation {c, e) such that the inner edge (d) of the previously smaller pre-drilled rivet hole is pulled up again and the correspondingly profiled rivet (f, g) grips claw-like in the resulting trough (c). 2. riveted connection according to claim 1, characterized in that the lower plate (b) is removed in such a way that a part of the lower edge still remains which is pressed up against the annular trough (c) of the upper plate (0) and thereby itself a Pan forms. 3. A method for producing a rivet connection according to claim 1 and 2, characterized marked that only the rivet holes are smaller than the expected rivets no pre-drilled or the lower sheet metal removed accordingly, then in the one on top of the other Sheet metal between punches the ring troughs · pressed in at the same time and the rivets drawn in on them will. For this purpose ι sheet of drawings.