Method of producing a sheet metal gear

Details Method of producing a sheet metal gear Method of producing a sheet metal gear

1997-02-07

2000-01-25

Echols, P. W.

Metal working

Method of mechanical manufacture

Gear making

2989333, 72110, B21D 5328

Patent

active

060166029

ABSTRACT:
The present invention relates to a method of producing a sheet metal gear in which a metal sheet (2) is used as a starting material and a gear is formed in the outer peripheral edge of the metal sheet. The object of the production method is to finish easily and accurately pitches of valleys and peaks of the gear which is formed in a simple production facility. The time period required for completing the formation of the gear in the outer peripheral edge of the metal sheet is shortened, thereby enhancing productivity. According to the production method, in the initial preparation step, a number of places of the outer peripheral edge of the circular metal sheet (2) which are arranged with a regular pitch are punched out in the axial direction, thereby forming preliminary valleys and preliminary peaks. Then, the method transfers to a gear forming step. In the gear forming step, a shaping roller which is rotated and follows the metal sheet increases the depth of the preliminary valleys to shape the valleys of the gear, and the height of the preliminary peaks to shape the peaks of the gear. The outer peripheral edge of the metal sheet is thickened as required before starting the preparation step.

REFERENCES:
patent: 1670475 (1928-05-01), Nicholson
patent: 3729967 (1973-05-01), Bauknecht et al.

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