US 12,103,064 B2
Punch assembly with interchangeable tips
Douglas Paul Staten, Indianapolis, IN (US); and Donald Carl Edwards, Martinsville, IN (US)
Assigned to E&S Enterprises Inc., Indianapolis, IN (US)
Filed by E&S Enterprises Inc., Indianapolis, IN (US)
Filed on Jan. 7, 2022, as Appl. No. 17/570,532.
Application 17/570,532 is a continuation in part of application No. 16/377,619, filed on Apr. 8, 2019, granted, now 11,235,370.
Prior Publication US 2022/0203421 A1, Jun. 30, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B21D 5/02 (2006.01); B21D 22/02 (2006.01); B21D 37/02 (2006.01); B21D 37/12 (2006.01)
CPC B21D 5/0209 (2013.01) [B21D 22/02 (2013.01); B21D 37/02 (2013.01); B21D 37/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A punch set comprising:
a plurality of punch bodies, each punch body of the plurality of punch bodies including a proximal end and a distal end opposite the proximal end, the proximal end including a flange configured to engage a punch holder, the distal end defining a distal surface extending along a lateral direction on said punch body, the distal surface including a front surface portion and a rear surface portion, the front surface portion facing a different direction than the rear surface portion;
a plurality of magnets embedded in the distal end of each punch body of the plurality of punch bodies, the plurality of magnets including at least one first magnet and at least one second magnet, the at least one first magnet facing the front surface portion of the distal surface and the at least one second magnet facing the rear surface portion of the distal surface; and
a plurality of punch tips configured to interchangeably and releasably engage the distal end of each punch body of the plurality of punch bodies, each of the punch tips of the plurality of punch tips having a working surface and an opposing surface, the opposing surface configured to engage the distal surface of one punch body of the plurality of punch bodies such that the opposing surface of the punch tip extends at least to the plurality of magnets embedded in said punch body, wherein the distal surface of said one punch body is a V-shaped surface such that the front surface portion is angled relative to the rear surface portion and defines a vertex that points in a press direction, the press direction defined along an axis that extends from the proximal end to the distal end of said one punch body and is perpendicular to the lateral direction.
 
7. A punch set comprising:
a plurality of punch bodies, each punch body of the plurality of punch bodies including a proximal end and a distal end opposite the proximal end, the proximal end including a flange configured to engage a punch holder, the distal end defining a distal surface extending along a lateral direction on said punch body, the distal surface including a front surface portion and a rear surface portion, the front surface portion facing a different direction than the rear surface portion, wherein the distal surface is a rectangular surface further including a bottom surface portion positioned between the front surface portion and the rear surface portion, wherein the front surface portion is parallel to the rear surface portion, and wherein a press direction is defined along an axis that extends from the proximal end to the distal end of said punch body and is perpendicular to the lateral direction and the bottom surface portion;
a plurality of magnets embedded in the distal end of each punch body of the plurality of punch bodies, the plurality of magnets including at least one first magnet and at least one second magnet, the at least one first magnet facing the front surface portion of the distal surface and the at least one second magnet facing the rear surface portion of the distal surface; and
a plurality of punch tips configured to interchangeably and releasably engage the distal end of each punch body of the plurality of punch bodies, each punch tip of the plurality of punch tips having a working surface and an opposing surface, the opposing surface configured to engage the distal surface of one punch body of the plurality of punch bodies such that the opposing surface of the punch tip extends at least to the plurality of magnets embedded in said one punch body.
 
8. A punch assembly comprising:
a punch body including a proximal end, a distal end opposite the proximal end, the proximal end including a flange configured to engage a punch holder, the distal end includes a distal surface extending along a lateral direction on the punch body, the distal surface including a first surface portion and a second surface portion wherein the first surface portion faces a first direction and the second surface portion faces a second direction that is different than the first direction and the lateral direction, wherein the distal surface of the punch body is a V-shaped surface such that the first surface portion is angled relative to the second surface portion and defines a vertex that points in a press direction, the press direction defined along an axis that extends from the proximal end to the distal end of the punch body and is perpendicular to the lateral direction; and
a punch tip coupled to the distal end of the punch body via a magnetic coupling provided by a plurality of magnets, the plurality of magnets including at least one first magnet defining a pole-side facing the first direction.
 
16. A method of bending a workpiece comprising:
securing a punch body to a punch holder, the punch body including a proximal end and a distal end opposite the proximal end, the distal end defining a distal surface extending in a lateral direction on the punch body, the distal surface including a front surface portion facing a first direction and a rear surface portion facing a second direction different from the first direction, wherein the front surface portion and the rear surface portion extend downwardly and meet at a downward facing lateral ridge, wherein a press direction is defined perpendicular to the lateral direction, and wherein the first direction is different than the press direction;
coupling a first punch tip to the distal end of the punch body using a magnetic coupling between the first punch tip and the punch body, the magnetic coupling provided at least in part by at least one first magnet having a pole side that faces the first direction, the first punch tip having a working surface and an opposing surface defining a cavity configured to engage the downward facing lateral ridge on the distal end of the punch body;
when the first punch tip is coupled to the punch body by the magnetic coupling, moving the punch body and the coupled first punch tip in the press direction such that the working surface of the first punch tip engages a workpiece;
bending the workpiece during engagement with the first punch tip; and
moving the punch body and the coupled first punch tip in a direction opposite the press direction such that the working surface of the first punch tip disengages the workpiece.
 
20. A punch assembly configured to bend a workpiece, the punch assembly comprising:
a monolithic punch body including a proximal end and a distal end opposite the proximal end, the proximal end including a flange configured to engage a punch holder, the distal end including a distal surface extending along a lateral direction on the punch body, the distal surface longer in the lateral direction than in a direction perpendicular to the lateral direction; and
a punch tip releasably coupled to the distal end of the punch body via a magnetic coupling provided by a plurality of magnets, the punch tip engaging the monolithic punch body in a tongue-in-groove arrangement wherein the plurality of magnets are embedded in the tongue-in-groove arrangement, wherein the distal end of the punch body provides a tongue portion of the tongue-in-groove arrangement, and wherein the punch tip provides a groove portion of the tongue-in-groove arrangement.