Mower bed blade method
AssigneeJRM, Inc.
InventorJames R. Merritt
Life of this patent
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Abstract
A method of forming a durable mower bed blade is provided in which the grain of the metal is perpendicular to the longitudinal axis of the blade. The blade is formed in part by coining the blade on a hydraulic press which strengthens the cutting edge and other areas to prevent chipping and cracking. Additional steps in the process include shearing the blade to a proper width, heat treating and grinding the edge of the blade to sharpen it.
Claims18
A method of forming a bed blade for a mower from a thin metal with the grain running the length of the metal comprising the steps of:
- a) forming a metal blank with the grain running the length of the blank;
- b) punching mounting holes in the metal blank;
- c) coining the blank with mounting holes to form a blade with a cutting edge which extends perpendicular to the grain direction along the width of the blade;
- d) heat treating the blade;
- and
- e) grinding the blade to sharpen the cutting edge.
A method of forming a bed blade for a mower comprising the steps of:
- a) forming a metal blank having a length shorter than the width, with the grain of the metal running the length of the blank;
- b) punching mounting holes in the metal blank;
- c) placing the blank in a fixture on a press having mounting studs to accommodate the mounting holes;
- d) coining the blank within the fixture to form a blade with a cutting edge along the width of the blade;
- e) shearing the blade while in the fixture to an exact length;
- f) machining the blade;
- and
- g) heat treating the blade.
Dependencies are inferred from the claim text.