Metal working – Method of mechanical manufacture – Electrical device making
Patent
1984-03-19
1985-09-03
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
29609, H02K 1502
Patent
active
045383456
ABSTRACT:
A method for the manufacture of plate-packs of coated metal laminas for electrical machinery and appliances in which the number of necessary manufacturing steps is reduced. After the laminas have been punched or stamped out, they are electrically upgraded by annealing and in the process are arranged at intervals with respect to one another and exposed to a reducing gaseous atmosphere. Then projections or depressions, known from punch-packing processes, which correspond to each other are punched into the laminas to connect them together. The laminas of a plate-pack are assembled into a unit by means of the interlocking projections and depressions prior to the annealing by an initial axial pressing step with an ensured axial minimum separation. After the annealing treatment, by means of a final axial pressing step, they are assembled into the final plate-pack form. The resulting plate-packs are particularly well suited for laminated stator or rotor packs for small electric motors or for electromagnetic switch gear.
REFERENCES:
patent: 3202851 (1965-08-01), Zimmerle et al.
patent: 4438458 (1984-03-01), Mitsui
Hall Carl E.
James J. L.
Powers F. W.
Siemens Aktiengesellschaft
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