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US 2011/0034259 A1Published application
Method of making a washer
AssigneeChun Zu Machinery Industry Co., Ltd.
InventorShi-Chang Lee
Life of this patent
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Abstract
A method of making a washer includes the steps of cutting a section of a wire material to form a blank, forging the blank in a first forging unit to form a rough blank that is larger in width and smaller in thickness than the blank, forging the rough blank in a second forging unit to form a prototype disc that is larger in width than the rough blank, and stamping and cutting the prototype disc in a third forging unit to form the washer.
Claims9
A method of making a washer, comprising:
- cutting a section of a wire material to form a blank;
- forging the blank in a first forging unit to form a rough blank that is larger in width and smaller in thickness than the blank;
- forging the rough blank in a second forging unit to form a prototype disc that is larger in width than the rough blank;
- and
- stamping and cutting the prototype disc in a third forging unit to form the washer.
2 more elements
Dependencies are inferred from the claim text.