Back to results
US 2011/0296893 A1Published application
Two-piece guide pin and method
AssigneeStandard Lifters, Inc.
InventorsScott M. Breen, Joel T. Pyper
Life of this patent
Estimating the term…
Abstract
A two-piece guide pin for metal forming dies includes a guide pin body formed from a cut length of an elongate, solid bar of stock having a cylindrical shape and a hard and smooth finished exterior surface with an outside diameter selected for close reception and reciprocal motion in an associated die bore. An alignment member is formed on a first end of the guide pin body. A guide pin head is formed from a cut length of an elongate, solid bar of stock having an outside diameter that is substantially greater than that of the guide pin body, and is rigidly connected with the second end of the guide pin body in a generally concentric relationship to define an enlarged head that positively limits travel between an associated die shoe and die pad.
Claims30
A method for making a two-piece guide pin for metal forming dies, comprising:
- selecting an elongate, solid bar of steel guide pin body stock with a cylindrical shape and a hard and smooth finished exterior surface having a predetermined outside diameter selected for close reception in an associated die member bore for precisely guiding reciprocal motion between a die pad and an associated die shoe;
- cutting a preselected length of the bar of guide pin body stock to define a guide pin body having first and second ends;
- forming an alignment member on the first end of the guide pin body to precisely locate the first end of the guide pin on an associated die plate;
- forming an external thread on the guide pin body at a location adjacent to the second end thereof;
- selecting an elongate, solid bar of guide pin head stock having a predetermined outside diameter that is substantially greater than the outside diameter of the bar of guide pin body stock;
- cutting a preselected length of the bar of guide pin head stock to define a guide pin head;
- forming a recess with a cylindrically-shaped sidewall in an interior face of the guide pin head sized to receive therein the second end of the guide pin body;
- forming at least one radially oriented aperture through the sidewall of the guide pin head which communicates with the recess therein;
- forming an internal thread in the sidewall of the recess in the guide pin head which mates with the external thread on the second end of the guide pin body;
- screwing the externally threaded second end of the guide pin body into the internally threaded recess in the guide pin head to threadedly connect the guide pin head with the guide pin body;
- and
- driving a tool through the radial aperture in the guide pin head and against an adjacent portion of the external thread on the second end of the guide pin body to upset the same and thereby permanently interconnect the guide pin body and the guide pin head to define an enlarged head that serves to positively limit travel between the die shoe and the die pad.
9 more elements
In a method for making a metal forming die of the type having a die shoe, a die pad mounted a spaced apart distance from the die shoe for mutual reciprocation between converged and diverged positions, and a biasing member disposed between the die shoe and the die pad for biasing the same to the diverged position, the improvement comprising:
- forming a base with a mounting face shaped to abut an adjacent face of the die shoe, at least one connector portion for detachably mounting the base to the die shoe, and a central aperture extending axially through the central portion of the base;
- forming a guide pin with a cylindrically-shaped central portion shaped for close reception in the central aperture of the base, a first end with an enlarged head shaped to abut the base block to positively limit travel between the die shoe and the dies pad, and a second end with an alignment member to precisely locate the second end of the guide pin on the die pad;
- including
- selecting an elongate, solid bar of steel guide pin body stock with a cylindrical shape and a hard and smooth finished exterior surface having a predetermined outside diameter selected for close reception in the central aperture of the base;
- cutting a preselected length of the bar of guide pin body stock to define a guide pin body having first and second ends;
- selecting an elongate, solid bar of guide pin head stock having a predetermined outside diameter that is substantially greater than the outside diameter of the bar of guide pin body stock;
- cutting a preselected length of the bar of guide pin head stock to define a guide pin head;
- and
- rigidly connecting the guide pin head with the second end of the guide pin body in a generally concentric relationship to define the enlarged head that serves to positively limit travel between the die shoe and the die pad;
- forming at least one fastener aperture in the die shoe at a preselected location;
- inserting the central portion of the guide pin body into the central aperture in the base for precisely guiding reciprocal motion between the die pad and the die shoe;
- engaging a fastener with the connector portion of the base and engaging the same in the fastener aperture in the die shoe to securely, yet detachably, mount the base on the die shoe;
- engaging the alignment member on the second end of the guide pin with the die pad to precisely locate the second end of the guide pin in the die pad;
- and
- securely, yet detachably, connecting the second end of the guide pin body with the die pad.
12 more elements
A method for making a two-piece guide pin for metal forming dies, comprising:
- selecting an elongate, solid bar of steel guide pin body stock with a cylindrical shape and a hard and smooth finished exterior surface having a predetermined outside diameter selected for close reception in an associated die member bore for precisely guiding reciprocal motion between a die pad and an associated die shoe;
- cutting a preselected length of the bar of guide pin body stock to define a guide pin body having first and second ends;
- forming an alignment member on the first end of the guide pin body to precisely locate the first end of the guide pin on an associated die plate;
- selecting an elongate, solid bar of guide pin head stock having a predetermined outside diameter that is substantially greater than the outside diameter of the bar of guide pin body stock;
- cutting a preselected length of the bar of guide pin head stock to define a guide pin head;
- and
- rigidly connecting the guide pin head with the second end of the guide pin body in a generally concentric relationship to define an enlarged head that serves to positively limit travel between the die shoe and the die pad.
4 more elements
A two-piece guide pin for metal forming dies, comprising:
- a guide pin body having first and second ends, and being formed from a cut length of an elongate, solid bar of steel guide pin body stock having a cylindrical shape and a hard and smooth finished exterior surface having a predetermined outside diameter selected for close reception in an associated die member bore for precisely guiding reciprocal motion between a die pad and an associated die shoe;
- an alignment member formed on the first end of the guide pin body to precisely locate the first end of the guide pin on an associated die plate;
- a guide pin head formed from a cut length of an elongate, solid bar of guide pin head stock having a predetermined outside diameter that is substantially greater than said outside diameter of said bar of guide pin body stock;
- and wherein
- said guide pin head is rigidly connected with the second end of the guide pin body in a generally concentric relationship to define an enlarged head that serves to positively limit travel between the die shoe and the die pad.
2 more elements
Dependencies are inferred from the claim text.