DD148016B1 - PRAEGE TOOL FOR WASHERS WITH IDENTIFICATION - Google Patents

Description

a) Title of the invention

Embossing tool for washers with marking

b) Field of application of the invention

The invention relates to a stamping tool for washers with marking, in particular for the production of washers for sliding screw connections made of special material, which are required for Stahlbaukonstrukliion ·

The embossing tool according to the invention is applicable for a material and time-saving production of said washers and similar products.

c) Characteristic of the known technical solutions

So far and also lately, for the sake of recognizability to be characterized washers on the circumference according to regulation, provided with knurls. This was formerly on machines with rotating spindles for receiving the workpieces and use of knurling tools of known type. Disadvantages are required feeding, Rieht-, tensioning and Abführvorrichtungen and the relatively high amount of time for the generation of knurling. * .7eiter it is known that the required marking on the circumference of the washers is produced without cutting in such a way that the discs are kept larger in diameter and then an edge portion, wherein the cutting tool on the punch and in the die has a knurled profile. The edge section with this tool makes the disks even

if knurled marked.

The use of these tools is uneconomical and material consuming. The lifetime of the tools is low. The edge section is about 40 % of the total weight of the disc .. The quality of the label is insufficient.

In the book "upsetting and pressing" by J. Billigmann, Carl Hanser Verlag, 1953 »u. a. on p. 366, punch dies for the production of slotted screws which at the same time insert the slot. Due to the very high level of wear of the stamped part for the slit, it has later been used interchangeable inserts, as has been customary elsewhere, and has increasingly applied the uniformly more favorable cross-slotted shape. Tools with off-the-circle shapes usually require manual milling and reworking (see p. 371). Upset tool inserts for embossing a Rändeis on the washers together with the other upsetting operations were not found in obvious Forin and manufacturability with minimal effort in other technical literature ·

d) Object of the invention

The aim of the invention is to provide the o.a. Eliminate shortcomings and create a cost-effective embossing tool with which the designated washers material and time-saving manufactured in the best quality v / sden can.

e) description of the invention

The technical task which is to be solved by the invention is to provide an embossing tool for the production of washers with marking (knurling), which is much cheaper to produce, achieves long service lives, can be regenerated quickly and economically, with the process stages be summarized in a single operation and the previously incurred liaterialverlust deleted from about 40 % of the total weight.

This goal has been realized so that a stamped on the inner cone surface with embossing engraved quickly interchangeable embossing ring and a paving and leveling with centering cone are arranged cooperating on a die housing of a stamping tool. By means of balancing the Pas_ and leveling punch in the axial direction to the stamping ring is adjustable. The engraving on the inner cone surface of the stamping ring can be produced by means of a standardized knurling tool.

The device according to the invention is designed so that the punch housing of a stamping tool, a replaceable fastened by holding ring stamping ring is mounted with a corresponding engraving, which is supported on the stamp housing. A well-known pas- and leveling punch with centering cone is guided in the stamping ring. Sr is supported against balancing disks, by which the axial position of the paving and leveling surface is determined. · The coining of the stamping ring, retaining ring, pas- and leveling punch and the leveling discs allows the embossing depth of the engraving to be changed quickly and easily. The Preßkraftsteuerung the embossing tool is done by Peder elements or Reibkraftsteuerung depending on the type of press. During the operation, the marking (engraving), pasing and leveling of the washers are carried out simultaneously, without material loss and with high quality. With this cost-effective tool, labor productivity is increased, the process level of the usual edge trimming and the required press with the expensive, short-lived cutting tools and material saved.

f) embodiment

The invention will be explained below using an exemplary embodiment.

The accompanying drawings show:

Pig. 1 embossing stroke with section Pig. 2 Top view of a section of a stamping ring

The embossing tool consists of a Einspannzapfen 1, Stempelgehäuae 2, embossing ring 3 with inner cone surface 12 and embossing engraving 13 »a paving and leveling ram 5 with? As- and leveling surface 8 and centering 6. Furthermore, the 7 / erkzeug include adjusting 7 and an ejector. 9 ,

Claims (2)

Invention claim: Embossing tool for washers with marking, inabesondere for sliding screw, characterized in that on a plunger housing (2) on the inner cone surface (12) with embossing engraving (13) provided in a conventional manner interchangeable embossing ring (3)> located on the Stempelgehause (2) is supported, as well as a known paving and leveling ram (5) with centering cone (6) are arranged · Documents considered: "Upsetting and pressing", J. Billigmann, Carl Hanser Verlag Munich 1953, p. 226/227, 366 For this 2 pages drawings