DE1030289B - Device for printing metallic circumferential hollow bodies on a press bench - Google Patents

Description

The invention relates to a device for pressing metallic circumferential hollow bodies a press bench. Depending on the final shape to be achieved, a sheet metal blank or a pre-drawn, more or less cylindrical body assumed between two approximately disc-shaped Bodies are clamped on the press bench and rotated. The wall the round blank or the drawn-out body is in most cases pushed inwards until the workpiece takes the form of an inner lining. In cases where the opening diameter narrows, is the feed divided several times in the longitudinal direction so that it can be removed in individual parts. the Deformation of the wall has so far usually been done by hand with a push tool attached to his Working end is hemispherical or mushroom-shaped and highly polished. This one is going against the encircling one Until after a series of work steps the workpiece gradually becomes the desired Final form is converted. This must be constantly treated with grease or petroleum. Nevertheless, there is occasional eating on the surface and wrinkling, as the Pressure is exerted essentially punctiformly on the wall of the hollow body. With workpieces Larger wall thicknesses are used both for deforming and for surface smoothing instead These pressure steels also have those with a front pressure roller, which are clamped on the support of the pressure bench and can be guided through it. This shaping work can only be done by hand specially trained and skilled workers.

As far as it concerned the production of lid-like bodies that are used in the area of the floor To be widened to achieve a larger diameter, one has proceeded so that one on the Shaft of a kind of press bench has a bowl-shaped shape with a much larger diameter, the inner wall of which one profiled according to the final shape to be achieved, and attached a roller to the support, which in turn had the same profile on its outer wall, taking into account the wall thickness of the workpiece adapted to the profiling of the outer tool shell. The latter role has now become workpiece to be deformed turned inside out, so that its wall gradually takes on the intended cross-sectional shape assumed. The workpiece was in turn driven by the outer shell and set the profiled one in the process inner roll also in circulation until the support has guided the inner roll accordingly the final form was brought about. It follows that there is no such device Device for pressing

of metallic encircling

Hollow bodies on a press bench

Applicant:
Westphalian aluminum industry

Jünger & Co.,
Lüdenscheid (Westphalia)

it is possible to create a different shape than the profiling of these two tools rotational solids was inevitably prescribed. Had any other final shape desired on the prerequisite that both tools had to be changed, even if only those Wall thickness of the workpiece changed. The freedom of movement peculiar to the spinning process was missing the tool guide to achieve any desired handling of the hollow molded body.

As far as it was concerned, tubular workpieces at one end by redistribution of material in the manner of pressing with the formation of a rounding To close, as it were, like a cap, you already have a rotating tool with a rounded one Provided a recess of larger diameter and now the tubular end to be closed of the workpiece moves centrally or eccentrically against this rotating tool, so that the Material gradually rearranged, upset and finally the extreme eccentric setting Assumed shape imposed on it by the inner curved wall of the tool. It It is easy to see that this type of procedure also depends on the freedom of design was missing.

The invention overcomes these disadvantages in that the tool has a concavely curved, annular shape closed, convex working surface with a larger radius of curvature than the hollow body to be deformed having. This ring body, which performs the deformation, is expediently slidable in an annular sleeve stored, primarily on ball bearings, so that he during the generation of the forming pressure against the circumferential hollow body in the same

809 527/149.

Claims (4)

Direction and moved at the same speed and accordingly each part of the surface of the hollow body is touched by a new part of the working surface of the annular body. This tool thus allows full freedom of movement with regard to the design of the hollow body with the particular advantage that a relatively large area of contact takes place at the work site, lubrication of the workpiece surface can be dispensed with and the surface of the workpiece remains tight and smooth. This deformation of the workpiece by means of the new tool takes place so favorably that the use of a one-part or multi-part inner lining can be dispensed with in almost all cases. The spherical working surface of this ring body can protrude on one or both sides over the side walls of the ring sleeve that supports it. The ring sleeve can be provided with a handle-like handle or socket for clamping in the support of the press bench, but can also continue directly as a clamping socket for the support. In the drawing, the subject matter of the invention is explained in more detail using exemplary embodiments. 1 and 2 show the first embodiment in a plan view and in section, FIG. 3 shows the section of a modified example, FIG. 4 shows the working process by means of a further modified embodiment of the tool. A tool according to FIGS. 1 to 3 is essentially intended for a manual operation with the press bench. The handle 1 carries an annular body 2 in which an annular sleeve 3 is freely running in ball bearing tracks, which has a work surface that is convex towards the center and can also be controlled by the support. The example according to FIG. 3 differs essentially from FIG. 2 only in that the width of the ring sleeve 3 still extends as a working surface beyond the width of the ring body 2 to one side. The diameter of the opening of the ring sleeve 3 is chosen larger than the outer diameter of the workpiece 4. The workpiece 4, a pre-drawn sleeve or round blank, is in the usual way on the bottom or in the middle by means of an attachment 6 which is attached to the quill printed against a counter-holder 5 screwed to the rotating axis. Since the attachment is mounted on the quill by ball bearings, the workpiece 4 rotates at the same speed as the axis of the press bench. A tool 2, 3 designed according to FIGS. 1 to 3 is now used in such a way that the annularly closed convex working surface 3, 3 α exerts the deformation pressure on the rotating workpiece 4. The ring sleeve 3 therefore rotates at the same speed as the tool. There is hardly any need for lubrication. This design opens the way to automatic tool guidance. It is sufficient if three pairs of ball bearings offset by 120 ° are distributed over the circumference of the ring. The ring body 2 receiving the ring sleeve 3 is itself designed as a sleeve body in the case of FIG. 4 and is clamped in the support of the press bench. Paten ta ν s ρ R 0 c η ε 1. Device for pressing metallic circumferential hollow bodies on a press bench by means of a spinning tool, which forms a surface that rolls off the periphery of the workpiece. has, characterized in that the tool has a concavely curved, annularly closed, spherical working surface (3, 3 a) with a larger radius of curvature than the hollow body to be deformed (4). 2. Apparatus according to claim 1, characterized by an annular sleeve (2) in which an annular body (3) with one curved towards the axis of rotation, possibly towards one or both Pages over the side walls of the sleeve (2) projecting work surface (3ß), z. B. on ball bearings, slides. 3. Apparatus according to claim 1 and 2, characterized in that the sleeve (2) with a handle-like handle or socket (1) for clamping is provided in the support of the press bench. 4. Apparatus according to claim 1 to 3, characterized in that the sleeve (2) directly as Clamping socket for the support is extended. Considered publications:
U.S. Patent Nos. 1,596,538, 2,726,561. 1 sheet of drawings © 809 527/149 5.58