Continuously variable speed, die-drawing device and process for

Details Continuously variable speed, die-drawing device and process for Continuously variable speed, die-drawing device and process for

1988-06-17

1989-07-11

Godici, Nicholas P.

Metal fusion bonding

Process

With shaping

228150, 228155, 2281737, 228 13, 228 16, 228 17, 228 175, 228 18, 219 612, 72367, 72368, 72206, 72250, 72260, 72276, B23K 3106, B23K 3108, B21G 100, B21H 900

Patent

active

048463922

ABSTRACT:
A die-drawing and/or extrusion device is described for producing uniform and tapered metal and composite tubes from flatstock and for reducing the size of solid stock and formed tubes therefrom, and lamination of compatable materials in one operation. The die comprises opposed die elements having curved helical tracks or grooves which follow a central orifice through which the flatstock, solid stock, tubes, etc., are pulled and/or pushed. Wedge-shaped shaping and alignment elements are positioned in the helical tracks in contact with the dies to align the feedstock with the die orifice, and to prevent the metal sheet or tube, rod, etc., from being drawn in between the tangential surfaces of the dies. The extent of product taper is determined by the pull rate applied to the feedstock in conjunction with the rotational rate of the dies, which can be varied continuously. The process results in a cold drawing of the feedstock, without galling or crushing the product, and this produces metal and composite articles having improved physical properties.

REFERENCES:
patent: 3361319 (1968-01-01), Sato et al.
patent: 3524245 (1970-08-01), Searing
patent: 3701270 (1972-10-01), Matthews
patent: 3717458 (1973-02-01), Lesko
patent: 3920173 (1975-11-01), Salata

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