Stock lifter assembly
AssigneeStandard Lifters, Inc.
InventorsScott M. Breen, Joel T. Pyper
Life of this patent
Estimating the term…
Abstract
A stock lifter for metal forming dies includes a self-contained assembly. The assembly includes a guide pin that reciprocates within a base. A hardened end cap, which contacts the stock, is attached to the guide pin. A spring is located on the exterior surface of a portion of the base and surrounds the guide pin body. One end of the spring contacts a surface on the cap, while the other end of the spring contacts a surface on the base or an optional mounting flange that is attached above the base. Thus, the stock lifter assembly has a hardened cap for the stock to slide on and a larger, externally mounted spring that provides longer life for the stock lifter. The stock lifter assembly can be made of several different lengths and sizes by using longer or wider guide pins and springs.
Claims20
A multi-station progressive metal forming die having a stock lifter assembly that has at least two mutually converging and diverging die members between which a stock piece is shifted longitudinally to form at least one part from the stock, the stock lifter assembly, comprising:
- a guide pin body with an outer end portion oriented toward the stock piece, an inner end portion oriented away from the stock piece, and a medial portion between the outer end portion and the inner end portion, wherein:
- said outer end portion includes an outer end surface with a ring groove;
- and
- said inner end portion includes a retainer groove on the guide pin body;
- a cap insert having an outer end portion oriented toward the stock piece and an inner end portion oriented away from the stock piece;
- a head ring with a central aperture, having an internal shoulder, said central aperture surrounds at least a portion of said cap insert, said head ring has a width that is wider than the width of said guide pin body;
- a ring member coupled to said ring groove that contacts said internal shoulder of said head ring;
- a base having an outer end portion oriented toward the stock piece and an inner end portion oriented away from the stock guide, with a guide pin aperture extending through the base, wherein:
- said outer end portion of said base has a first width;
- and
- said inner end portion of said base has a second width that is larger than said first width, forming a shoulder on the exterior surface of said base, and an inner end surface;
- a spring member having a generally hollow interior with an outer end portion oriented toward the stock piece and an inner end portion oriented away from the stock piece, wherein:
- said outer end portion contacts a surface of said head ring;
- and
- said inner end portion contacts said shoulder on an exterior surface of said base;
- and
- a retainer received on said retainer groove on said inner end portion of said guide pin body, said retainer contacting said inner end surface of said base when said stock lifter assembly is fully raised.
A stock lifter assembly for a metal forming die in which stock is formed into at least one part, comprising:
- a guide pin body with an outer end portion oriented toward the stock and an inner end portion oriented away from the stock, wherein:
- said outer end portion includes an outer end surface with a ring groove;
- and
- said inner end portion includes a retainer groove on the guide pin body;
- a cap insert having an outer end portion oriented toward the stock and an inner end portion oriented away from the stock;
- a head ring with a central aperture, having an internal shoulder, said central aperture surrounding at least a portion of said cap insert and having a width that is wider than the width of the guide pin body;
- a ring member coupled to said ring groove that contacts at least a portion of said internal shoulder of said head ring;
- a base having an outer end portion oriented toward the stock and an inner end portion oriented away from the stock with a guide pin aperture extending through the base, wherein:
- said outer end portion of said base has a first width;
- and
- said inner end portion of said base has a second width that is larger than said first width, forming a shoulder on the exterior surface of said base, and an inner end surface;
- at least one fastener relief formed on said base;
- a spring member having a generally hollow interior with an outer end portion oriented toward the stock and an inner end portion oriented away from the stock, wherein:
- said outer end portion contacts a surface of said head ring;
- and
- said inner end portion contacts at least a portion of said shoulder on said exterior surface of said base;
- and
- a retainer received on said retainer groove on said inner end portion of said guide pin body, said retainer contacting said inner end surface of said base when said stock lifter assembly is fully raised.
A stock lifter assembly for a metal forming die in which stock is formed into at least one part, comprising:
- a guide pin body with an outer end portion oriented toward the stock and an inner end portion oriented away from the stock, wherein:
- said outer end portion includes an outer end surface with a ring groove;
- and
- said inner end portion includes a retainer groove on the guide pin body;
- a cap insert having an outer end portion oriented toward the stock and an inner end portion oriented away from the stock and a tapered section;
- a head ring with a central aperture, having an internal shoulder, said central aperture including a section that surrounds at least a portion of said cap insert, said head ring having a width that is wider than the width of said guide pin body;
- a ring member coupled to said ring groove that contacts said fastener shoulder of said head ring;
- a base having an outer end portion oriented toward the stock and an inner end portion oriented away from the stock with a guide pin aperture extending through the base, wherein:
- said outer end portion of said base has a first width;
- and
- said inner end portion of said base has a second width that is larger than said first width, forming a shoulder on the exterior surface of said base, and an inner end surface;
- a spring member having a generally hollow interior with an outer end portion oriented toward the stock and an inner end portion oriented away from the stock, wherein:
- said outer end portion contacts a surface of said head ring;
- and
- said inner end portion contacts a surface of said shoulder on an exterior surface of said base;
- and
- a retainer received on said retainer groove on said inner end portion of said guide pin body, said retainer contacting said inner end surface of said base when said stock lifter assembly is fully raised.
Dependencies are inferred from the claim text.