Device for manufacturing curved helical springs

Details Device for manufacturing curved helical springs Device for manufacturing curved helical springs

1993-07-28

1999-02-09

Ip, Sikyin

Metallurgical apparatus

Having means for contacting a solid metalliferous material...

With means changing the shape of a treated object, e.g.,...

266103, 72135, 72137, 72138, 72141, 72145, C21D 162, B41F 3500

Patent

active

058689966

ABSTRACT:
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.

REFERENCES:
patent: 1816377 (1931-07-01), Hobracht
patent: 2218864 (1940-10-01), Widgren

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