Die unit with quick change features
AssigneeDayton Progress Corporation
InventorAllan E. Randolph, Sr.
Life of this patent
Estimating the term…
Abstract
A die system wherein upper and lower die shoes have a basic generally standardized form and are adapted for an interchangeable mount of various sub-assemblies embodying different die tools. The system features means facilitating a precise and quick location of a sub-assembly on its related die shoe as well as a quick release thereof. The invention further provides a unique pressure cell for backing the material being worked in a manner to insure optimal performance of the die and a quality work product.
Claims26
For use in a die system, a die half including a die shoe having a through opening, means peripherally of the opening being configured to support a carrier plate, a carrier plate received in said opening, a sub-plate superposing on said die shoe and confining said carrier plate in said opening, a pressure plate overlying said sub-plate and reciprocable relative thereto, means on said sub-plate in a generally surrounding relation to said pressure plate and defining a die sperture, a pressure cell suspended from said carrier plate and depending therefrom to position at least a portion thereof within said opening, said cell including a spring pressed platform located in an underlying relation to said carrier plate, and means based on said platform and extending through said carrier plate and said sub-plate into a supporting relation to said pressure plate.
For use in a die system, a sub-assembly comprising a die tool and a backing means therefor, said die tool being adapted to be mounted in abutted relation to said backing means and means for precisely and quickly locating said die tool on said backing means including means defining a central recess in one of said tool or backing means and a mating dowel projecting from the other and means defining a groove in one of said tool or backing means which orients in a line radial to said central recess and its mating dowel and a projection defining a dowel on the other, a simultaneous alignment of said recess and groove with the respectively related dowels facilitating an immediate and direct slip fit of one to the other of said tool and backing means to precisely define the required position of said die tool on said backing means.
Apparatus particularly advantageous for use in connection with one element of a die for quickly and precisely locating said one element relative another element of the die including a body, a projecting end portion of which is adapted for application in a passage, cavity or recess in the other said element, said end portion having a form to present, upon a relative angular disposition of its central axis with reference to the wall defining said passage, cavity or recess, a peripheral configuration of its cross sectional outline providing for a slip fit entry thereof within the confines of said wall, and said end portion having a form to present, upon a change of said relative angular disposition of its central axis following said slip fit entry, a cross-sectional outline disposing transverse to said wall which provides for a substantial friction fit engagement thereof to said wall precluding its relative lateral movement.
For use in a die system, a die half including a die shoe, a sub-plate separably applied to an outwardly facing surface of said die shoe and a die tool applied to an outwardly facing surface of said sub-plate, and means acting inherently in the application of said sub-plate to said die shoe precisely to locate said sub-plate and to prevent relative angular movements thereof and in the application of said die tool to said sub-plate precisely to locate said die tool and to prevent relative angular movements thereof.
For use in a die system, snap action means precisely to locate a pair of superposing parallel plates relative to one another, including plural plug devices each having a projecting head, the projecting head of each having an intermediately positioning short length cylindrical portion from which the head decreases in diameter, said plug devices being installed in one of said plates and being adapted to have their projected heads received in recesses in the other of said plates, said projecting heads being introduced into said recesses in a two-phase snap action motion in a first of which said plates are held in a tilted relation to one another with decreased diameter portions of said heads entering said recesses and in a second of which said plates are brought into contacting parallel relation straightening said projected heads in said recesses and placing each said short length cylindrical surface in close bearing contact with a respective recess wall.
Dependencies are inferred from the claim text.