DE1236456B - Steel strip cutting tool - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B2ld

German class: 7c -18

Number: 1236 456

File number: T14681Ib / 7c

Filing date: February 1, 1958

Open date: March 16, 1967

The invention relates to a steel strip cutting tool with two parallel, relatiy movable plates, guided as a die set and carrying the male or female mold, with steel strips inserted in grooves between an inner and an outer block of compressible material. In known such band steel cutting tools, the steel strips forming the die are only held in their grooves by a suitable insertion. With such a steel strip cutting tool, satisfactory performance can be achieved with normal requirements, but the alignment of the die to the die is difficult and can therefore only be carried out with limited accuracy, since the entire die (or die ) must be moved with its plate on its holding surface. In the case of steel strip cutting tools, however, it is important to keep the cutting gap very precisely, as otherwise the thin steel strips are stressed too much. E ¹ S are also known band steel cutting tools in which only a die formed from steel strips is present, which are held clamped between blocks of compressible material by a clamping frame. Since there is no male mold in this steel strip cutting tool, no alignment of the female mold is necessary, and it can only be used for workpieces made of less hard material, such as, for. B. wood, cardboard, leather, rubber and the like. Can be used.

The object of the invention is to design the aforementioned steel strip cutting tool so that by a precise alignment high performance can be achieved. In accordance with the invention, this is achieved achieves that the die has a known chase frame from more than two sides is tensionable.

With such a design of the steel strip cutting tool, the steel strips with the chase not only clamped, but they can also be aligned with respect to the patrix. It it has been shown that results can be achieved in this way, which in terms of performance and durability are vastly superior to known steel strip cutting tools. The order in such a way that the chase can be stretched from more than two sides, enables precise alignment the cutting die on the patrix taking into account the usual cutting gap. The alignment the die opposite the patrix is an essential steel strip cutting tool

Applicant:

Templet Industries Incorporated,

Brooklyn, New York, N.Y. (V. St. A.)

Representative:

Dr.-Ing. A. ν. Kreisler, Dr.-Ing. K. Schönwald
and Dr.-Ing. Th. Meyer, patent attorneys,
Cologne 1, Deichmannhaus

Named as inventor:

Milton Berlin, Forest Hills, N.Y .;

Lawrence M. Rheingold,

Baldwin, Long Island, N.Y. (V. St. A.)

Claimed priority:

• V. St. v. America of March 4, 1957 (643 595),
dated April 8, 1957 (651252)

borrowed more easily than if the male part had to be adapted to an existing female part. Simultaneously the steel strips of the die are held tightly clamped by the chase, what their Increased rigidity and durability. By guiding the die and the patrix supporting Plates keep the tool parts in their aligned position. All of the features contribute to this in that the steel strip cutting tool is subject to significant stresses, e.g. B. when machining workpieces made of steel, without the tolerance being noticeable despite high performance suffers, i.e. protection is only sought for the combination of all features according to the patent claim. To tension and align the steel strips of the cutting tool, one can proceed in such a way that the cutting male is rigidly attached to the plate serving as the lower part of the tool. After that, the Cutting die initially in approximate alignment with the cutting die on the ram, e.g. on a Plunger attached. Then the tensioning of the steel strips of the cutting die is carried out precisely Alignment of this is carried out on the incision male by means of the locking frame.

709 519/194

Claims (8)

10 The invention is explained below with reference to the embodiment shown in the drawing Fig. 1 shows a bottom view of a cutting die according to the invention in the scheme; Fig. 2 is a longitudinal section on the line II-II in Fig. 1; F i g. 3 shows a plan view of the male incision in the scheme; 4 shows a longitudinal section along the line IV-IV in F ig. 3. The cutting die 1 has straight steel strips 2, 3 and 4, which together form a rectangle form. The steel strips are located between an inner block 5 and an outer block 6 made of compressible material. The envisaged, from the bars 7 existing chase for the Blocks 5 and 6 can be tensioned from more than two sides by means of the screws 8. The tensioning of the Bars 7 takes place on the plate 9, which can be moved back and forth by means of a pressure piston 10, ao In the case of steel strips 3 and 4, a free space 11 is provided before the bracing, which makes it possible that after closing the closing frame, the steel strips by pressing together the blocks butt close together. The incision male 12 consists of the support plate 13 and the male plate 14, which are attached to the support plate 13 is fastened by screws 15. The outline of the male plate 14 corresponds to the shape of the Punching tool of the part to be punched out. The plates 9 and 13 are to allow precise engagement of the cutting die and the cutting die ensure through (not shown) guides, for. B. pins and holes, guided like a die set. Claim: Steel strip cutting tool with two parallel, movable relative to each other, as Die set guided to each other, the patrix or matrix supporting plates, with its matrix Steel strips in grooves between an inner and an outer block of compressible material Material are used, characterized in that the die (1) has a known closing frame (7,8), the can be tensioned from more than two sides. Considered publications:
U.S. Patent Nos. 1,082,986, 2,495,221. 1 sheet of drawings 709 519/194 3.67 θ Bundesdruckerei Berlin