Wiper cap assembly
A wiper cap assembly that can couple to a reciprocating member of a metal forming die. The wiper cap assembly couples to the top of a guide housing and includes a rod wiper that presses against a reciprocating rod within the guide housing. The rod wiper prevents the entry of containments on the section of the rod that reciprocates past the rod wiper.
1 . A guide assembly for a metal forming die having converging and diverging plates, comprising:
a guide pin body having a guide pin aperture with a wiper cap groove;
a wiper cap body having a first end portion, a second end portion, a medial portion between said first end portion and said second end portion, and an aperture;
wherein said first end portion has a flange section and a first diameter at the intersection with the medial portion;
wherein said medial portion has a second diameter that is larger than said first diameter forming an exterior shoulder on said wiper cap body; and
wherein said second end portion includes an inwardly extending ledge that forms a wiper groove between said ledge and said medial portion;
a rod wiper with a first end section and a second end section, said first end section being shaped to be received in said wiper groove on said wiper cap body;
wherein said second end section is a tapered section extending from said first end section;
wherein said tapered section includes an inwardly extending portion with an internal diameter and an exterior tapered surface;
a guide pin received in the guide pin aperture of said guide pin body, said guide pin having an external diameter that is larger than the internal diameter of said inwardly extending portion; and
wherein said flange section of said wiper cap body is received in said wiper cap groove of said guide pin body.
2 . The guide assembly for a metal forming die of claim 1 , including a bushing that is received within said guide pin body.
3 . The guide assembly for a metal forming die of claim 2 , wherein an internal diameter of said bushing is smaller than an internal diameter of said aperture in said wiper cap body at said first end portion.
4 . The guide assembly for a metal forming die of claim 3 , wherein said first end portion of said wiper cap body contacts said bushing.
5 . A wiper cap assembly for a guide pin body used in a metal forming die, comprising:
a guide pin body having a guide pin aperture with a wiper cap groove;
a wiper cap body having a first end portion, a second end portion, a medial portion between said first end portion and said second end portion, and an aperture;
wherein said first end portion has a flange section and a first diameter at the intersection with the medial portion;
wherein said medial portion has a second diameter that is larger than said first diameter forming an exterior shoulder on said wiper cap body; and
wherein said second end portion includes an inwardly extending ledge that forms a wiper groove between said ledge and said medial portion;
a rod wiper with a first end section and a second end section, said first end section being shaped to be received in said wiper groove on said wiper cap body;
wherein said second end section is a tapered section extending from said first end section;
wherein said tapered section includes an inwardly extending portion with an exterior tapered surface; and
wherein said flange section of said wiper cap body is received in said wiper cap groove of said guide pin body.
6 . The wiper cap assembly for a metal forming die of claim 5 , including a bushing that is received within said guide pin body.
7 . The wiper cap assembly for a metal forming die of claim 6 , wherein an internal diameter of said bushing is smaller than an internal diameter of said aperture in said wiper cap body at said first end portion.
8 . The wiper cap assembly for a metal forming die of claim 7 , wherein said first end portion of said wiper cap body contacts said bushing.
9 . A guide pin assembly comprising:
a guide pin body having a guide pin aperture with a wiper cap groove;
a wiper cap body having a first end portion, a second end portion, a medial portion between said first end portion and said second end portion, and an aperture;
wherein said first end portion has a flange section and a first diameter at the intersection with the medial portion;
wherein said medial portion has a second diameter that is larger than said first diameter forming an exterior shoulder on said wiper cap body; and
wherein said second end portion includes an inwardly extending ledge that forms a wiper groove between said ledge and said medial portion;
a rod wiper with a first end section and a second end section, said first end section being shaped to be received in said wiper groove on said wiper cap body;
wherein said second end section is a tapered section extending from said first end section;
wherein said tapered section includes an inwardly extending portion with an internal diameter and an exterior tapered surface;
a guide pin received in the guide pin aperture of said guide pin body, said guide pin having an external diameter that is larger than the internal diameter of said inwardly extending portion; and
wherein said flange section of said wiper cap body is received in said wiper cap groove of said guide pin body.
10 . The guide assembly for a metal forming die of claim 9 , including a bushing that is received within said guide pin body.
11 . The guide assembly for a metal forming die of claim 10 , wherein an internal diameter of said bushing is smaller than an internal diameter of said aperture in said wiper cap body at said first end portion.