DE7020509U - MOLDING ROLL FOR PROJECTING STRETCH PRESSURE MACHINES. - Google Patents

Description

Applicant: Leifeld & Co., Ahlen / Westf. Beckumer Str. 92-98

"Forming roller for projection stretching machines"

The forming rollers of the well-known projection machines attack only at one point on the rotating workpiece to be formed. During the feed movement of the tool, concentric grooves are formed on the workpiece surface. A surface created in this way is relatively rough and seldom with ai: * em very slow Feed not easily polishable.

The innovation is therefore based on the task of creating a forming roller for projection stretching machines, r.it with the help of which particularly smooth workpiece surfaces can be achieved with a very low surface roughness.

The innovation solves the problem in that the forming roller is one of the front circumferential surface of the spinning chuck or has the exact outer shape of the finished workpiece corresponding concave recess.

According to a preferred embodiment of the innovation, the forming roller has a front convex pressing shoulder, a slightly concave zone for smoothing and a raised angular rear shoulder.

An embodiment of the innovation is shown in the drawing and is based on this drawing in the following described in more detail:

The single figure shows the form roller according to the innovation in a side view during the smoothing process of a previous one Projection stretching formed round blank.

The only figure shows the press chuck Io, between to which and the tailstock 11, the blank 12 to be formed is clamped. The reshaping is done with the help of the Forming roller 13 which is mounted in a fork 14.

The forming roller 13 according to the innovation has a pressing shoulder 15 on which a slightly concave smoothing zone is attached 16 connects; which by an angular rear Shoulder 17 is limited.

With the form roller 13 according to the innovation is worked in such a way that the circular blank 12 initially by means of the front Edge 15, the so-called pressure shoulder, is reshaped. After reaching the end point, the smoothing zone begins 16, which corresponds to the front circumferential surface of the spinning chuck 10 or the exact outer shape of the finished workpiece, the finishing done. The right profile the roller remains on the finished, formed workpiece, creating a particularly good workpiece surface is achievable. The concentric grooves created on the workpiece surface by the pressing process are smoothed in this way by the same forming roller. The result is a surface that is extraordinary has a low surface roughness.

Since the reform according to the form role of the exact Außenfonc. of the workpiece, so the

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edge or pressing shoulder 15 grooves generated by the concave smoothing zone 16 pressed shut, and there is one special compression and smoothing of the material. As a result, the cambered parts now also fall with a polishable Surface, which was previously not possible when working with the known form rollers.

Protection claims:

Claims (2)

- 5 protection claims: 1. Forming roll for projection stretching machines, characterized in that that this one of the front circumferential surface of the spinning chuck (lO "or the exact Außenfora des finished workpiece (12) has a corresponding concave recess (16). 2. Forming roller according to claim 1, characterized in that this has a front convex pressure shoulder (15), a has a slightly concave zone (16) for smoothing and a raised, angular rear shoulder (17).