Metal deforming – By relatively movable offset tool-faces – Multi-point tool-couple
Patent
1988-05-02
1990-06-19
Jones, David
Metal deforming
By relatively movable offset tool-faces
Multi-point tool-couple
72 15, 72 22, 72447, B21D 1302
Patent
active
049341693
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method of bringing a tool to a desired engagement position relative to and in engagement with a strip of material which is intermittently advanced in its longitudinal direction past the tool and which has a repeating basic shape, for example in the form of linked, identical products shaped in the strip of material, which cyclically repeat in the longitudinal direction of the strip. The basic shape can be, for example, a plurality of linked identical products made in the strip.
In various fields of manufacture there is a need to efficiently produce a large number of identical products of a certain predetermined shape (cross-sectional shape), said products being linked to each other, for example side by side, and forming a long strip of material; or in other words a strip incorporating the products.
One example of such manufacture is the production of socalled sheet nails in strips, i.e. nails made of profiled sheet metal being parallel to each other and linked via connecting bridges between the longitudinal edges of adjacent nails in the strip. In such a sheet nail strip, the individual nails (=the products) are made with a certain desired profile shape as viewed in cross-section. The nails can be V-shaped in cross-section, for example.
Examples of such sheet nails and strips are disclosed in U.S. patent application Ser. No. 07/053,829, filed May 14, 1987.
In producing linked products in strips with a certain desired final shape of the individual products, the strip (which can be a sheet metal strip for example) is worked and/or shaped sequentially in a number of tool stations arranged in sequence in the direction of movement of the strip.
It is for example possible to produce the basic shape of the product in a first tool station with the aid of a vertically acting shaping punch (i.e. a bending punch) which is repeatedly brought into shaping engagement with the simultaneously incrementally advanced sheet metal strip, so that it is given the repeated basic shape, i.e. a V-shaped. In the following additional working and shaping stations located downline from the first mentioned station in the advancing path of the strip, the products included in the strip can be given a successively more finished shape.
Even if the basic shape of the product in question (which is intended to be produced at a first station) is made with the greatest possible precision and regularity, to among other things, achieve a constant spacing between the products in the strip, it is still not possible in practice to avoid a certain lack of precision in the regular shaping and spacing of the products in the strip. This can be because of variations in the working cycle of the first shaping punch (the bending punch), variations in the incremental advancing of the strip between the basic shaping of two adjacent products in the strip, varying material properties in different portions of the strip, etc. If the following tool stations located downline in the direction of advance of the strip are placed at entirely fixed stationary locations spaced along the strip path, it is not possible to guarantee that the workings or shapings made at these stations will be superimposed on the shape (of the respective product in the strip) already produced upline at the exact intended location of each product. Thus the tool at the downstream workstation in question will at times make its shaping or working stroke at a somewhat misplaced location on the product. The actual tool engagement location will thus often lie somewhat laterally displaced in relation to the exact desired location on the product where the tool should have struck. The reason is that the individual product as a result of the above mentioned variations is not exactly in the position which it would assume if each such variation could be avoided, and this is impossible in practice.
The problem on which the invention is based is thus assuring entirely correct positioning of the tools at the workstations located downline, relative to the basic shapes of the
REFERENCES:
patent: 1095683 (1914-05-01), Stambach
patent: 3123125 (1964-03-01), Lacey, Jr.
patent: 3211043 (1965-10-01), Sanford
patent: 3307387 (1967-03-01), Lacey, Jr. et al.
patent: 3872641 (1975-03-01), Falkenberg
patent: 3911773 (1975-10-01), Inowaki
patent: 3961512 (1976-06-01), Mentis
Jones David
Nordisk Kartro AB
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