Two-piece guide pin and method
First Claim
1. In a method for making a metal forming die of the type having first and second die members mounted a spaced apart distance from one another for mutual reciprocation between converged and diverged positions, a biasing member disposed between the first and second die members for biasing the same to the diverged position, and at least one modular guided keeper assembly disposed between the first and second die members for precisely guiding and limiting the reciprocal motion therebetween, the improvement comprising:
- forming a guided keeper base with a mounting face shaped to abut an adjacent face of the first die member, at least one connector portion for detachably mounting the guided keeper base to the first die member, and a central aperture extending axially through a central portion of the guided keeper base;
forming a guided keeper guide pin with a cylindrically-shaped central portion shaped for close reception in the central aperture of the guided keeper base, a first end with an enlarged head shaped to operatively engage the guided keeper base to positively limit travel between the first and second members, and a second end with an alignment member to precisely locate the second end of the guided keeper guide pin on the second die member;
includingselecting 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 guided keeper 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 first end of the guide pin body in a generally concentric relationship to define the enlarged head that serves to positively limit travel between the first and second die members;
forming at least one fastener aperture in the first die member at a preselected location;
inserting the central portion of the guide pin body into the central aperture in the guide pin base for precisely guiding reciprocal motion between the first and second die members;
engaging a fastener with the connector portion of the guided keeper base and anchoring the fastener in the fastener aperture in the first die member to securely, yet detachably, mount the guided keeper base on the first die member;
engaging the alignment member on the second end of the guided keeper guide pin with the second die member to precisely locate the second end of the guided keeper guide pin on the second die member; and
securely, yet detachably, connecting the second end of the guide pin body with the second die member.
1 Assignment
0 Petitions
Accused Products
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.
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Citations
38 Claims
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1. In a method for making a metal forming die of the type having first and second die members mounted a spaced apart distance from one another for mutual reciprocation between converged and diverged positions, a biasing member disposed between the first and second die members for biasing the same to the diverged position, and at least one modular guided keeper assembly disposed between the first and second die members for precisely guiding and limiting the reciprocal motion therebetween, the improvement comprising:
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forming a guided keeper base with a mounting face shaped to abut an adjacent face of the first die member, at least one connector portion for detachably mounting the guided keeper base to the first die member, and a central aperture extending axially through a central portion of the guided keeper base; forming a guided keeper guide pin with a cylindrically-shaped central portion shaped for close reception in the central aperture of the guided keeper base, a first end with an enlarged head shaped to operatively engage the guided keeper base to positively limit travel between the first and second members, and a second end with an alignment member to precisely locate the second end of the guided keeper guide pin on the second die member;
includingselecting 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 guided keeper 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 first end of the guide pin body in a generally concentric relationship to define the enlarged head that serves to positively limit travel between the first and second die members; forming at least one fastener aperture in the first die member at a preselected location; inserting the central portion of the guide pin body into the central aperture in the guide pin base for precisely guiding reciprocal motion between the first and second die members; engaging a fastener with the connector portion of the guided keeper base and anchoring the fastener in the fastener aperture in the first die member to securely, yet detachably, mount the guided keeper base on the first die member; engaging the alignment member on the second end of the guided keeper guide pin with the second die member to precisely locate the second end of the guided keeper guide pin on the second die member; and securely, yet detachably, connecting the second end of the guide pin body with the second die member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. In a method for making a metal forming die of the type having first and second die members mounted a spaced apart distance from one another for mutual reciprocation between converged and diverged positions, and at least one modular guided keeper assembly disposed between the first and second die members for precisely guiding and limiting the mutual reciprocation of the first and second die members between the converged and diverged positions, the improvement comprising:
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forming a guided keeper base with a mounting portion shaped for operable connection with and support on the first die member, and a central aperture extending axially through a generally central portion of the guided keeper base; forming a guided keeper guide pin with a cylindrically-shaped central portion shaped for close reception in the central aperture of the guided keeper base, a first end with an enlarged head shaped for operable engagement with the guided keeper base to positively limit travel between the first and second die members, and a second end with an alignment member to precisely locate the second end of the guided keeper guide pin on the second die member;
includingselecting an elongate, solid bar of rigid guide pin body stock with a cylindrical shape and a hard and smooth 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 first end of the guide pin body in a generally concentric relationship to define the enlarged head that serves to positively limit travel between the first and second die members; forming at least one fastener aperture in the first die member at a preselected location; inserting the central portion of the guide pin body into the central aperture in the guided keeper base for precisely guiding and limiting reciprocal motion between the first and second die members; operatively engaging a fastener with the connector portion of the guided keeper base and anchoring the same with the fastener aperture in the first die member to securely, yet detachably, mount the guided keeper on the first die member; engaging the alignment member on the second end of the guided keeper guide pin with the second die member to precisely locate the second end of the guided keeper guide pin on the second die member; and securely, yet detachably, connecting the second end of the guide pin body with the second die member. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification