Metal working – Method of mechanical manufacture – Spring making
Patent
1995-11-07
1997-10-21
Echols, P. W.
Metal working
Method of mechanical manufacture
Spring making
B23P 1300
Patent
active
056783094
ABSTRACT:
The process is used to prepare a leaf-shaped oscillatory spring of a rectangular or square surface shape, made of hardenable spring steel for electric diaphragm pumps, which have as the drive motor an oscillating armature magnet, with is provided with an axially oscillating plunger-type armature arranged coaxially to a system axis in the interior space of a central magnet coil. The oscillatory spring has two spring legs, which are connected by a head-side cross web and are each provided in the free foot area with a fastening hole used for the positioning accommodation of a cylindrical centering pin each, and the oscillatory spring has, approximately in the center of its surface, a flexible tongue cut free on three sides, with a central fastening bore for a plunger-type armature shaft. To make possible a high dimensional accuracy and exact, stress-free fastening of the oscillatory springs in an economical manner, the oscillatory spring is punched in its surface shape with at least one fastening bore from a soft strip material and then hardened. The remaining fastening holes are subsequently punched in a second punching process in the hardened state of the oscillatory spring.
REFERENCES:
patent: 5046227 (1991-09-01), Akiike et al.
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