Stamped bevel gear
OwnerWilliam Bilakinventor
Life of this patent
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Abstract
A method of manufacturing gear forms comprising cold forming metal stock to produce a workpiece having a protruding hub portion with a central opening, impressing indentations in the hub portion by means of appropriate dies, boring and counterboring the region around the hub portion, and modifying the central opening according to the configuration of a shaft to be received thereby.
Claims12
A method for manufacturing a gear form having an integral hub with a central opening for receiving a drive shaft having a predetermined cross-sectional shape, said method comprising the steps of:
- (a) piercing a hole defined by an edge in a metal stock workpiece;
- (b) forming a protrusion in the region of the stock including the hole, without substantially restricting the flow of displaced metal along the length of the protrusion;
- (c) compressing the protrusion with no forming tools in the hole, to a predetermined height without substantially restricting the flow of the displaced metal into the edge of the hole;
- and
- (c) piercing the region surrounding the hole to the cross-sectional shape of the drive shaft.
A method for manufacturing a gear form having an integral hub with a central opening for receiving a drive shaft having predetermined cross-sectional shape, said method comprising the steps of:
- piercing a hold defined by an edge in a metal stock workpiece;
- forming a protrusion in the region of the stock including the hole, without substantially restricting the flow of displaced metal along the length of the protrusion;
- compressing the protrusion to a predetermined height without any forming tool in the hole and without substantially restricting the flow of the displaced metal into the edge of the hole;
- piercing the region surrounding the hole to the cross-sectional shape of the drive shaft;
- and
- flattening the uppermost surface of the protrusion without substantially restricting the flow of the displaced metal.
A method for manufacturing a gear form having an integral hub with a central opening for receiving a drive shaft having a predetermined cross-sectional shape, said method comprising the steps of:
- piercing a hole defined by an edge in a metal stock workpiece;
- forming a protrusion in the region of the stock including the hole, without substantially restricting the flow of displaced metal along the length of the protrusion;
- compressing the protrusion to a predetermined height without any forming tool in the hole and without substantially restricting the flow of the displaced metal into the edge of the hole;
- piercing the region surrounding the hole to the cross-sectional shape of the drive shaft;
- and
- forming a plurality of equi-angularly disposed indentations on the exterior of the protrusion extending parallel to and about the axis of the hole, said forming step comprising causing the displaced metal to flow inimpededly and build up the area about said hole.
Dependencies are inferred from the claim text.