Abstract
A tool gripping and alignment plate arrangement, for accurately gripping and holding a tool in perfect alignment. The alignment plate arrangement comprises a flat unitary tool gripping plate. An irregular bore opening is formed in the tool gripping plate, for gripping a tool therein. The irregular bore wall opening is comprised of a first wall portion of 180 degrees in circumference, and a distortable second wall portion of less than 180 degrees in circumference. A bore-facing tool relief portion is arranged on a distal end of the distortable second wall portion.
Claims
1. A tool gripping and alignment plate arrangement, for accurately gripping and holding a tool in alignment, comprising: a flat unitary tool gripping plate; an irregular bore wall opening formed in the tool gripping plate, for gripping a tool therein, the irregular bore wall opening comprised of a first wall portion of 180 degrees in circumference, and a distortable second wall portion of less than 180 degrees in circumference, with a bore-facing tool relief portion at an end of the distortable second wall portion; and wherein the first wall portion and the second wall portion each have centers of curvature in alignment when the second wall portion of the irregular bore is in a distorted state.
2. The tool gripping and alignment plate arrangement as recited in claim 1, wherein the first wall portion and the second wall portion each have independent centers of curvature when the first wall portion of the irregular bore is in a non-distorted state.
3. The tool gripping and alignment plate arrangement as recited in claim 1, wherein the second wall portion is and a curvilinear cut extending in a generally J-shape around a portion of the bore opening form a generally J shaped biasable member.
4. The tool gripping and alignment plate arrangement as recited in claim 3, wherein an end of the generally J shaped biasable member is the bore-facing tool relief portion, wherein the bore-facing tool relief portion has a sloped surface.
5. The tool gripping and alignment plate arrangement as recited in claim 4, wherein the sloped surface of the tool relief portion is arranged at an angle of about 10 to 15 degrees with respect to the distortable second wall portion.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The objects and advantages of the present invention will become more apparent when viewed in conjunction with the following drawings, in which:
(2) FIG. 1 is a perspective view of a center punch holder plate utilized to surround a tool in a die set cutting assembly arrangement;
(3) FIG. 2 is a plan view of the center punch holder plate shown in FIG. 1;
(4) FIG. 3 is first (right shown) side view of the center punch holder plate shown in FIG. 2; and
(5) FIG. 4 is a second (lower shown) side view of the center punch holder plate shown in FIG. 2.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
(6) Referring now to the drawings in detail, and particularly to FIG. 1, there is shown a center punch holder plate 52 of the present invention has a central bore 64 for squeezably pinching and holding a tool 106 (only partially shown in FIG. 1) concentrically therewithin, with respect to adjacent tool holding plates. The central bore 64 in the exemplary center punch holder plate is slightly out of round at one almost semi-circular side location 103 thereof, as represented in FIG. 2 which extends from E to B. A and B are 180 degrees apart on the inner bore 64 defining C1. That almost semi-circular side location 103 C3 also includes the beginning or distal end of a curvilinear cut 86 through the center punch holder plate 52 which curvilinear cut 86 extends in a generally semi-circular or somewhat J shaped pattern around the central bore 64, as may be seen in FIGS. 1 and 2. That generally semicircular cut 86 extends from the bore wall at point A, and around the bore at least 180 therearound, looking like and creating somewhat like a J shaped curved finger 84. In one embodiment of that semicircular cut 86, the second or proximal end 88 of that cut 86 curves slightly radially outwardly and away from the center of that central bore 64 within the center punch holder plate 52, and has a different center of curvature Z from the center of curvature Y on the opposite side 110 of that bore 64, as represented somewhat exaggeratedly in FIG. 2.
(7) A threaded bore 92 is arranged through the side edge of the exemplary center punch holder plate 52, as represented in FIGS. 1, 2 and 4, and extends up to the radially outer surface of that generally semi circular cut 86, meeting the cut 86 at a location of about one third the distance from the distal end of that cut 86, as shown in FIG. 2. An adjustment bolt 112 is disposed within that threaded bore 92 so (when turned) enables (or releases) a bias on the radially outward side of the cut 86, when that adjustment bolt 92 is rotated within that bore 64. That generally semicircular cut 86 through the exemplary center punch holder plate 52 in effect creates a flexible grip finger 84. A bias inwardly by the adjustment bolt 112 against the finger 84 presses the semi-circular curved wall portion 103 of that finger 84 slightly inwardly radially, so as to distort the irregular bore into a non-irregular bore and hence create a perfect circular hole in that central bore 64, except for the relief portion 100 of the bore wall. When for example, a tool 106 such as a center punch, for example, is placed within the center punch holder plate 52, and the adjustment bolt 112 is tightened with respect to that finger 84, the center punch tool 106 is now squeezed tightly within a distorted bore 64, which now, after tightening by the adjustment bolt 112, now effects a perfect circular hole as the bore 64. By aligning the respective centers Y and Z of the adjacent holder plates within the upper portion and the lower portion of the die set arrangement, the matable tool components therein may be held in perfect axial alignment, as represented in the earlier referenced patent.
(8) The center punch holder plate 52 comprising the present invention is thus a block or plate having the tool gripping bore 64 extending generally centrally therethrough, as shown in FIGS. 1 and 2. The tool gripping bore 64, now identified more specifically, has a first half circle C1 of arcuate configuration of 180 going from a 1.sup.st point A to a 2.sup.nd point B on that bore 64, as represented in FIG. 2. The 1.sup.st arcuate configuration C1 has the 1.sup.st center of curvature Y. The tool gripping bore 64 has a 2.sup.nd arcuate configuration C3 of almost a half circle going from the 2.sup.nd point B on that bore 64 to a 3.sup.rd point E on that bore 64. The 2.sup.nd arcuate configuration C3 extends from 2.sup.nd point B to the 3.sup.rd point E which is slightly less than one hundred and eighty degrees (180) from the 2.sup.nd point B on the wall of the bore 64.
(9) The 2.sup.nd arcuate configuration C3 is comprised of a bore-facing-side of the generally J shaped finger 84 as identified in the aforementioned patent. That J shaped finger 84 being formed by the cut 86 of generally J shape through the block or plate 52 as afore described.
(10) The J shaped finger 84 has a distal end with a tool-relief bore-facing sloped away planar surface 100 thereon, best represented in FIG. 1, beginning at the 3.sup.rd point E on the bore 64, which 3.sup.rd point E is about one hundred and sixty degrees (160) from the 2.sup.nd point B on the bore 64. The bore facing planar surface 100 is arranged at a slope or angle M, shown in FIG. 2, of about 10 to 15 with respect to the curvature at the 3.sup.rd point E of the bore 64, and extends to point Q at the distalmost end of the J shaped finger 84. The sloped away planar surface 100, provides a point of relief to facilitate entry of a tool 106 within that bore 64.
(11) The J finger-adjustment-bolt 112 may be threaded through the threaded bore 92 on the side of the center punch holder plate 52, as shown in FIGS. 1 and 2, to provide careful inwardly and outwardly releasably biasable adjustment of the J shaped finger 84 around a tool 106 within the multicurved non-circular-to-distorted circular bore-to-distorted multicurved non-circular bore 64. When an adjustment bolt 112 abuts against and pushes the J shaped finger 84 into close contact with a tool 106 within the bore 64, the two different centers of curvature Y and X for the respective portions of the bore periphery, are adjustably distortable into common alignment.
(12) A keyway 120, shown in FIGS. 1, 2 and 3, is arranged through the center punch holder plate 52. which keyway 120 tangentially forms a slight opening 130 in the wall surface of the 1.sup.st semicircular (non-movable, non-distorted portion 100) configuration of the bore 64. The keyway 120 extends across the center punch holder plate 52 as shown in FIGS. 1 and 2, and is of non-circular configuration, best shown in FIG. 3, so as to minimize surface contact and hence more easily receive a cylindrical key 122, shown in FIG. 1, which key 122 would be pushed therethrough. The non-circular keyway 120 configuration is preferably of generally square shape, however having rounded corners therealong. The non-circular keyway 120 is made within the center punch holder plate 52 by a cutting wire, not shown, which is creates an elongated cut 125 and is maneuvered into the location for the elongated, squareish keyway. The cutting wire would form the generally non-circular transverse shape of the keyway 120 by electrical discharge against the metal of the center punch holder plate 52.
