US 4,052,873 AGranted

Apparatus for continuous pressing of bolts, screw blanks or similar parts

AssigneeVeb Schraubenkombinat

InventorsHorst Murzin, Gunter Grygo

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Abstract

Apparatus for shearing blanks from elongated workpieces and for pressing such blanks into screw blanks, bolts or the like in a continuous operation comprises a plurality of preferably cylindrical rotary elements, rotatable about parallel axes in such a manner that cooperating pairs of rotatable elements are rotated in opposite direction and so that blank receiving members on the rotary elements of each cooperating pair becomes successively aligned with each other. The plurality of rotary elements includes a central rotary element receiving sheared-off blanks and retaining the same during the pressing thereof until the final discharge, and a plurality of additional rotary elements arranged about the circumference of the central rotary element. One of the additional rotary elements serves to shear off blanks from the elongated workpieces and to transfer such blanks to the central rotary element and at least two further rotary elements cooperate with the central rotary element for forming the blanks through pressing.

Apparatus for shearing blanks from elongated rod-shaped workpieces and for pressing such blanks into bolts or similar configurations in a continuous operation, comprising a plurality of rotary elements arranged closely adjacent each other rotatable about parallel axes, each of said rotary elements being provided in the region of its periphery with blank receiving means, said rotary elements cooperating in pairs with each other and including a central rotary element, the blank receiving means of which are receiving blanks after the latter are sheared off and maintain said blanks during the pressing thereof until the finel discharge of the formed blanks, and a plurality of additional rotary elements arranged about the circumference of said central rotary element, one of said additional elements serving to shear blanks from the elongated rod-shaped workpieces and to transfer such blanks to the blank receiving means of the central rotary element, and at least two additional rotary elements for partly forming said blanks;

drive means for rotating said rotary elements about their axes in such a manner that the rotary elements of cooperating pairs are respectively driven in opposite directions and so that the blank receiving means on one rotary element of each pair will become successively aligned with corresponding blank receiving means on the other rotary element of the respective pair;
means coordinated with said blank receiving means of said one additional rotary elements for shearing blanks from elongated rod-shaped workpieces;
and means coordinated with said blank receiving means of all rotary elements for applying axial forces to such blanks for transferring such blanks from said one additional rotary element to said central element, for applying opposite axial forces to said blanks as said blank receiving means on said central rotary element and the other additional rotary elements approach each other for pressing said blanks, and for discharging said blanks from the blank receiving means of said central element after pressing when said blank receiving means of said central element pass through a discharge zone displaced in the direction of rotation of said central element downstream of the last of said additional rotary elements.

Abstract

Claims7