Die with profiled base wall and its associated punch
AssigneeGreenlee Textron Inc.
InventorWilliam F. Nordlin
Life of this patent
Estimating the term…
Abstract
An assembly includes a die and a punch which cut a hole in a workpiece. The die has a base wall having outer and inner surfaces and a passageway extending therethrough, and a wall extending from the base wall. The inner surface of the base wall has at least one portion which is angled relative to a central axis of the die. The punch includes a body having a bore therethrough, a leading edge on the body which is capable of piercing and cutting a workpiece, and cutting edges on the body for cutting a hole in the workpiece. The leading edge has inclined surfaces between the bore and the piercing points which engage with the portion of the inner surface of the die.
Claims14
A die for use with a punch capable of piercing and cutting a workpiece, said die comprising:
- a base wall having a perimeter, an outer surface and an inner surface;
- a depending wall extending from said perimeter;
- a passageway extending through said base wall;
- and
- a central axis extending through said passageway, said outer surface of said base wall being perpendicular to said axis, said inner surface of said base wall having a portion which is angled relative to said central axis at an angle that is different than 90 degrees and engages the punch when the punch is fully inserted into the die.
An assembly comprising:
- a die comprising a base wall having a perimeter, an outer surface and an inner surface, a depending wall extending from said perimeter, a passageway extending through said base wall, and a central axis extending through said passageway, said outer surface of said base wall being perpendicular to said central axis, said inner surface of said base wall having at least one portion being angled relative to said central axis at an angle that is different than 90 degrees;
- and
- a punch comprising a body having a bore therethrough, a leading edge on said body capable of piercing a workpiece, and cutting edges on said body for cutting a hole in the workpiece, said leading edge having piercing points and an inclined surface extending from each piercing point to said bore, said inclined surfaces engaging with said portion of said inner surface of said die and said piercing points do not engage with said inner surface of said base wall of said die when said leading edge engages with said inner surface of said base wall of said die.
Dependencies are inferred from the claim text.