DE1922757B2

DE1922757B2 - PROCESS FOR MANUFACTURING A METAL COMPOSITE MATERIAL

Info

Publication number: DE1922757B2
Application number: DE19691922757
Authority: DE
Inventors: Ulf Dipl Chem Dr 5909 Wasserscheide Richter
Original assignee: Dynamit Nobel AG
Current assignee: Dynamit Nobel AG
Priority date: 1969-05-03
Filing date: 1969-05-03
Publication date: 1972-10-26
Also published as: NL7004818A; BE749669A; GB1288432A; DE1922757A1; FR2047139A5; JPS5231826B1; US3672033A

Description

3 ' 4 3 '4

nen ruht das obere Metallblech 3, auf welches wie- keine Fehlstellen ergeben. Die Schrauben können derum die Sprengmittelschicht aufgebracht ist. Diese auch aus dem Material des Auflagewerkstorfes nergeist mit einem hier nicht dargestellten Zünder versehen, stellt sein. Dabei muß darauf geachtet werden, daß sie so daß sie von einer Seite her zur Detonation gebracht das Gewicht des sprengstoffbeladenen Auhagebiewerden kann und dabei die beiden Metallbleche 1,3 5 ches 3 aushalten können, ohne umzuknicken,
fortschreitend miteinander verbindet. Der Abstand- Im folgenden sei ein Ausfuhrungsbeispiel angehalter 2 wird mit eingeschweißt und bildet Zickzack- führt: Es sollte ein Verbundmatenal aus einem litanfönnige Einschlüsse, die jedoch wegen der geringen blech mit Abmessungen von 3000 X 1500 X 2 mm Drahtstärke klein gehalten werden. mit einem Kesselblech H Π der gleichen Lange und Die Abstandhalter! bestehen beispielsweise aus io Breite und einer Stärke von 15 mm verbunden wer-0,1 bis 0,8 mm starkem Weicheisendraht Beim Wik- den. Die Abstandhalter bestanden dabei aus Weicheikeln zu Schrauben, deren Außendurchmesser gleich sendraht mit einem Durchmesser von 0,3 mm, der zu dem geforderten Blechabstand ist, wird der Draht ge- Schrauben von 3 mm Durchmesser gewickelt wurde, reckt und verfestigt sich, so daß auch die anschließend Die Schrauben wurden auf die fünffache Lange ausin Längsrichtung auseinandergezogenen Schrauben 15 einandergezogen, in Stücke zerschnitten und diese in erheblichen Belastungen standhalten können, ohne Abständen von etwa 200 bis 300 mm über die gesamte zusammenzuknicken. Beim Plattieren erfährt die aus Fläche verteilt Nach dem Sprengplattieren ergab dem Blechzwischenraum herausgetriebene Luft kei- sich, daß keine Fehlstellen aufgetreten waren, und daß nen Widerstand, und es wird relativ wenig Fremdma- das Verbundmaterial keine oberflächlich sichtbaren terial in die Bindungsfläche eingebracht, so daß sich 20 Erhöhungen aufwies.NEN rests the upper metal sheet 3, on which there are no defects. The screws can be applied around the layer of explosive. This nergeist is also made of the material of the support workshop with a detonator (not shown here). Care must be taken that it can be detonated from one side so that it can bear the weight of the explosive-laden vehicle and can withstand the two metal sheets 1,3 5 ches 3 without kinking,
progressively connects with each other. The spacing - in the following is an exemplary embodiment stopped 2 is welded in and forms zigzag leads: It should be a composite material made of a filamentous inclusions, which, however, are kept small because of the small sheet metal with dimensions of 3000 X 1500 X 2 mm wire thickness. with a boiler plate H Π of the same length and the spacers! consist, for example, of a width of 10 mm and a thickness of 15 mm. 0.1 to 0.8 mm thick soft iron wire is connected when winding. The spacers consisted of soft articles to form screws, the outer diameter of which is equal to wire with a diameter of 0.3 mm, which is the required sheet metal spacing The screws were then pulled together to five times the length of screws 15 pulled apart in the longitudinal direction, cut into pieces and able to withstand considerable loads without buckling together over the entire distance of about 200 to 300 mm. During plating, the surface is distributed showed 20 bumps.

Hierzu 1 Blatt Zeichnungen 1 sheet of drawings

Claims

Speaking sheet metal beforehand by deformation. This creates an uneven distribution of stress in the material with the risk of stress

1. Process for the production of a metal anti-stress corrosion cracking. In addition, at the points of bund material by explosive plating, with wel- 5 indented indentations later in the chem plating between the metal sheets to be connected.

coiled metallic spacers with the Finally it is made by the USA. patent

Longitudinal axis parallel to the metal sheets is known 3 360 848, spacers made of plastic foam the, characterized by the application, which, if necessary, with reinforcement from a screw line made of metal can be provided. Such a knee-shaped coiled wire. brackets are only allowed for light cover sheets

2. The spacer can be used to carry out the process. If they, what if slightly warped rens according to claim 1, from a wound cover sheet may be the case, at individual points Metal strand, characterized in that it is too strongly compressed, entangles twisted people there Metal strand has a helical 15 carbonization and unbonded areas.

mig-wound wire is. For others, in the German patent specification

3. Spacer according to claim 2, characterized in the described embodiments of 1 261 379, that the metal strand is made by known spacers, of which the present unwinding solidified soft iron wire. are helically wound,

20 corrugated or zigzag bent sheet metal strips (Metal strand) is provided, which is to be connected between the

the metal sheets are placed. This results in

relatively large inclusions of foreign material corresponding to the shape of the sheet metal strips. In addition

The invention relates to a method of manufacturing that the sheet metal strips represent a considerable amount of a metal composite material due to explosive air resistance. The metallic spacer air, which is wound between the metal sheets to be connected and displaced from the space between the metal sheets to be connected, can build up at these points and form eddies with the longitudinal axis parallel to the sheets, whereby bonding errors occur,
will. 30 The object of the invention is therefore, in the blasting

By the German Auslegeschrift 1 229 821 clad metal sheets to avoid that overplaying it is known to use composite material of multi-part foreign parts between the parts to be clad To produce reren metal plates by enclosing them in parts.

connecting plates while maintaining an intermediate This object is achieved according to the invention by the

between space are placed on top of one another. A layer of explosives is applied to the use of spacers made from a screw-top sheet metal, and a wire wound in the form is loosened.
detonated with a fuse. The effect of the measure claimed

can. Due to the pressure wave of the detonation that consists in that during the explosive plating upper sheet accelerated against the lower; No damaging air congestion and collision result when it hits the welding occurs. Between 40 the formation of unbound positions between the Metal spacers located on the sheet metal plates and the risk of occurrence of are also welded in due to the high pressure. Stress corrosion cracking is practically eliminated.

The spacers must be designed so that because of the use of thin wire, the

They are strong enough to support the upper sheet metal, spacers that prevent the air from escaping from the 45 sheets during the blast and practically no resistance between the sheets. The wire is left as a fine zigzag so that no pressure jam forms. Tape is also welded in. The spacers have required that the material of the spacer does not have a considerable load-bearing capacity.
Forms inclusions in the composite material that lead to The spacer can be made of the material of a

Bond failure. 50 of the sheets to be connected exist. He can too

There are already numerous spacers for connection made of a different material, provided that this use is suggested for blast cladding and the sheets to be connected are not brittle leads. So it is formed by the German Auslegeschrift gierungen. It is particularly beneficial. For 1 229 821 known to use metal particles in the form of small production of the spacer a soft iron wire grains between the sheets to be bonded to 55, which are scattered as a result of the winding. This method is only suitable for very small loads.
gaps between the sheets, and there is a risk of the spacers rolling away during their

Disadvantage that a lot of foreign material is clad in. Another disadvantage is that the grains can prevent transport before plating, especially if the sheets are fixed by spot welding after they have been opened.
place one on top of the other still have to be transported, the invention will fall out easily in the following with reference. would take on the drawing explained in more detail. Here is the

It is also by the United States patent arrangement of the individual situation prior to implementation of the 3 140 539 known, the upper sheet to achieve explosive plating shown in section. The lower a sufficient distance with formations 65 sheet metal is denoted by 1. There are several or to provide dents. It is true that more helically wound spacing is used of the explosive plating no foreign material ter 2 of thin metal wire arranged horizontally, of included, but it is necessary that only one of them is visible in the drawing. On her-