DE173008C - - Google Patents

Description

IMPERIAL

PATENT OFFICE

It is already known to connect a core made of iron or steel with a coating of other metal Coating in a groove in the core by pulling and pressing both metals together to fix. The present invention resides in a method in which for connecting a core made of iron or steel with a coating made of another metal ίο the core is formed from a slightly curved profiled strip, which initially together with the cover is bent into a tubular shape by pulling, the bent over Edges of the coating metal extend approximately to the middle of the core tube, whereupon both metals are drawn like this by repeated pulling are pressed together so that the central cavity disappears.

The different stages of production according to the new process »; are on the drawing illustrates, namely shows:

Fig. Ι the plan view of the individual parts α and b used for the production of a rod from the beginning of the production period «5 to the end of the same and

2 to 5 different sections according to AA, I) -B, CC, DD of FIG. 1 during the different manufacturing periods.

Fig. 6 shows a die bringing the cladding together with the core in the initial period.

Figures 7 and 8 are top and bottom plan views of this die.

That with a coating metal, z. B. Mes-. Sing, copper, aluminum, tombac and other metals or metal alloys to be encased core piece α (Fig. I) made of iron or steel, as can be seen from FIG. 2, has the shape of a channel in cross section. This rinnenförniige profile is produced by rolling or other suitable methods. The sheet metal strip b , which is used for cladding and has a slightly larger width than the core piece a , is placed against the convex side of the rod α and in this way inserted into a drawing iron (Fig. 6, 7 and 8), which allows the sides of the sheet metal strip to be folded over b causes inward around the edges of the core piece α (Fig. 3).

The drawing die consists of an upper and a lower part. The lower part is as Formed male mold for the channel-shaped core piece, in such a way that the bend the channel increases towards the exit. The top has only one in the beginning very little bend, so that the sheet metal strip is still in the flat state can be easily introduced with the core at the same time. Since the curvature while behind the entrance ^ becomes smaller very quickly, the original becomes flat sheet metal forced to fold its edges inwards until the Sheet metal edges encompass the edges of the core piece. Subsequent to this figure, i. H. corresponding to the slightly more curved

Claims (1)

Back of the core piece, the outlet opening of the upper part of the drawing die is designed (Fig. 6, 7 "" -Ι H) - After this operation has been carried out, the rod prepared in this way goes through another drawing iron from dc.r. common and known shape for ruTide profiles, which has the effect that the edges of the core piece a with the sheet metal wrapped around each other ίο even closer (Fig. 4), so that almost the cylindrical shape (Fig. 5) is reached for the Pa 11 of the production of a cylindrical rod. In the manufacturing stage (Fig. 5), the rod is given its exact final shape, ie the joint that was still open after the previous operation is completely closed as a result of the sharp compression of the edges of the core piece α and that The material of the cover sheet b is pressed around the material of the core piece α in such a way that an extremely firm adherence of the cover is ensured.
• The core piece α as a whole, as can be seen by name from FIGS. 2 and 3, has a channel-like profile. The. both boundary surfaces of the longitudinal edges are flattened or flattened. When they are bent together in the drawing die, these flattened longitudinal edges of the core piece α are pressed against one another and, at the same time, the metal strip b laid around is brought and held between the edges of the core piece. In this way, a rod is produced (FIG. 5), in which the top metal with its end edges is worked radially into the core piece α made of iron or steel during the drawing process. The covering rivet is intimately united with the core piece a not only on the outer covering surface, but also inside the core piece itself through the pressing during the drawing. In the production of square, hexagonal or other profiled bars is the procedure except for the application of a modified last, the final form determining drawing iron exactly the same. , With the bars made in this way The coating adheres so firmly that it is possible. edit them in the same way as Rods that are made from only one material. The poles can be pulled twist, wrap spirally - and bring into any other shape without a Loosening of the coating is to be feared. The rods can also be drilled or milled and otherwise processed without causing the coating to detach. According to this process, brass-clad rods with an iron core are special useful for the. Use as decorative rods for decorative purposes, for carpet rods and other uses and decorations. The simplicity of manufacture enables a significant reduction in the previous cost of such rods. Ρλ τ ε ν τ - A ν s ρ κ υ c η: Method of joining a core made of iron or steel with a coating made of other metal, with the coating in a cheek of the core by pulling and pressing both metals together, characterized in that the grain consists of a slightly bent profiled strip is formed, which is initially together with the coatings by pulling Tubular is bent, with the bent edges of the Uberaigsmetalles Reach approximately to the middle of the core tube, and that by pulling again both metals are pressed together so that the central cavity disappears. For this purpose ι lilati drawings.