Fried Krupp Ag Hoesch-krupp

Hoesch Federn Gmbh

Hans Vondracek

Heinz Krober

The objects are a reliable and economical method of and device for manufacturing helical springs that are curved when unstressed from sections of wire or rod heated to coiling temperature. The spring is coiled straight and then curved it to its final shape. The device consists of a hot-coiling production line comprising a kiln (1), a series of rollers (2), a coiling bench (4), and a quenching tub (6). A tool (5) for curving helical springs (10 or 14) is integrated into the production line between the coiling bench and the quenching tub.

Device for manufacturing curved helical springs

A shotpeening machine for helical compression springs. It comprises a spring-peening chamber accommodating shot-impelling rotors, mechanisms for accommodating and tensioning the springs, and mechanisms for loading the springs into and unloading them from the accommodating and tensioning mechanisms. The accommodating and tensioning mechanisms comprise one or two spring holders (5) that travel back and forth horizontally into the peening chamber (3) and in that the loading and unloading mechanisms are prismatic belts (6) that parallel the chamber.

Arrangement for ball shot peening helical compression springs

A method of optimizing the distribution of inherent stress in springs intended for vehicle suspensions, especially in the rod cross-section of high-strength helical compression springs, whereby the springs are set and bombarded with balls. The springs are forwarded for the operations setting and bombardment at a gradient of strength prescribed for the particular rod cross-section.

Method of optimizing the distribution of inherent stress in springs

A method of manufacturing helical springs that are curved when unstressed from wire or rod heated to coiling temperature in one step. The spring is coiled on a mandrel that is curved to match the desired curvature of the finished spring.

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Breckerfeld, Germany

Hans Vondracek