U.S. patent number 3,599,318 [Application Number 05/007,367] was granted by the patent office on 1971-08-17 for method of bonding sheets.
This patent grant is currently assigned to Behlen Manufacturing Company, Inc.. Invention is credited to Walter D. Behlen.
United States Patent |
3,599,318 |
Behlen |
August 17, 1971 |
METHOD OF BONDING SHEETS
Abstract
A mechanical splice for rolls of metal in continuous metal
fabrication wherein each splice includes a portion deformed from
adjacent sheets of metal thereby limiting relative movement
therebetween. In one embodiment, the portion of material deformed
is spread after it is deformed to prevent it from returning to its
original condition. A die for performing the deformation and
spreading includes a flat die surface with oppositely outwardly
flaring end surfaces which press superimposed portions of the
sheets of metal into a depression in a second die against a
yieldable pin which spreads at least one of the portions by at
least the time the movable die has bottomed out but after the one
portion is deformed out of its sheet of material. The method of
forming the mechanical splicing involves the deforming of the
elongated portion thereby forming an opening in the sheet of
material and then the spreading of the deformed portion such that
it cannot pass back into the opening. The spreading may begin at
the same time as the deforming step begins but is not completed
until the deforming step has been completely finished. A second
embodiment of the splicing includes semielliptical portions the
mirror image of each other on opposite sides of a perpendicular
plane to the sheets of material being deformed on opposite sides of
a parallel plane to the sheets of material to lock the sheets
against relative movement. The dies for forming the semielliptical
deformations are the mirror image of each other and have convex
outer surfaces whereby they register with each other.
Inventors: |
Behlen; Walter D. (Columbus,
NB) |
Assignee: |
Behlen Manufacturing Company,
Inc. (Columbus, NB)
|
Family
ID: |
21725755 |
Appl.
No.: |
05/007,367 |
Filed: |
February 2, 1970 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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629505 |
Apr 10, 1967 |
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Current U.S.
Class: |
29/509; 29/521;
403/285; 29/21.1; 29/522.1 |
Current CPC
Class: |
B21D
39/035 (20130101); Y10T 29/34 (20150115); Y10T
403/4991 (20150115); Y10T 29/49938 (20150115); Y10T
29/49936 (20150115); Y10T 29/49915 (20150115) |
Current International
Class: |
B21D
39/03 (20060101); B21d 039/00 (); B23p
011/00 () |
Field of
Search: |
;29/21.1,509,521,522
;113/116FF,1.1 ;287/189.36D |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Moon; Charlie T.
Parent Case Text
This Application is a continuation of application Ser. No. 629,505,
filed Apr. 10, 1967, now abandoned.
Claims
I claim:
1. The method of bonding a pair of sheets of material together,
comprising
placing first and second sheets in overlapping condition whereby a
portion of one sheet extends over said other sheet to create upper
and lower sheets,
placing an upwardly extending truncated conical pin below said
upper and lower sheets and in contact with a portion of said lower
sheet to be deformed,
imposing a force on said sheets to shear portions from said sheets
and to deform said sheared portions from said upper and lower
sheets to a position below the plane of the lower sheet,
permitting said pin to yield slightly during the initial stages of
the imposition of said force, and holding said pin substantially
rigid during the final stages of deformation of said first and
second sheets whereby said pin penetrates the deformed portion of
said lower sheet to expand said deformed portion of said lower
sheet laterally beneath the lower sheet to prevent any realignment
of said deformed portion to its original position.
Description
In working with rolls of metal sheets or the like it is necessary
from time to time to secure adjacent sheets together and thus the
mechanical splices of this invention have been provided to
accomplish this fastening by the use of a simplified machine and
method. A die assembly may have a plurality of die elements for
forming a plurality of splices between sheets in mating engagement
with each other. In the one embodiment of the mechanical splice,
elongated portions of material are deformed from their respective
sheets thereby forming openings in the sheets and at least one of
the elongated portions is then spread such that it cannot pass back
into its opening in its sheet. These steps are performed in the
method of making the splice of this invention by use of as for
example the die machine of this invention. The second embodiment of
the mechanical splice involves superimposed sheets each having side
by side semielliptical deformed portions which are the mirror image
of each other deformed in opposite directions perpendicular to the
plane of sheets such that each side of the bonded sheets will
include side by side concave and convex portions semielliptical in
shape meeting along with minor axis.
These and other features and advantages of this invention will
become readily apparent to those skilled in the art upon reference
to the following description when taken into consideration with the
accompanying drawings, wherein:
FIG. 1 is a fragmentary perspective plan view of a pair of rolls of
sheet material having portions fastened together with a plurality
of splices;
FIG. 2 is a fragmentary enlarged perspective view of the male die
head;
FIG. 3 is a plan view of the female die head;
FIG. 4 is a fragmentary cross-sectional view of the die in its open
condition;
FIG. 5 is a fragmentary cross-sectional view similar to FIG. 4 but
showing the die and the material after the splice has been formed
and the die has been returned to its open position;
FIG. 6 is a cross-sectional view taken along line 6 -6 in FIG.
5;
FIG. 7 is a fragmentary bottom plan view of the splice deformed by
the die;
FIG. 8 is a top plan view of a pair of rolls of sheets material
including a plurality of alternate mechanical splices;
FIG. 9 is a fragmentary perspective view of the two die halves for
forming the alternate mechanical splice; and
FIG. 10 is a cross-sectional view of the dies and splice material
with the die halves in their open condition.
In FIG. 1 two sheets of material 10 and 12 are shown being
dispensed from a pair of rolls 14 and 16 respectively. A plurality
of splices 20 have been formed between the two sheets of material
10 and 12.
A die press 24 includes a movable upper die half 26 and a
stationary lower die half 27. The upper die half includes an
elongated male element 28 having a center horizontal surface 30
with oppositely extending outwardly flaring flat surfaces 32 and
34. The bottom die half includes a cavity 36 substantially the same
width and length as the male die element 28. A cylindrical plunger
38 larger in diameter than the cavity 36 (FIG. 3) is mounted in the
center of cavity 36 and includes a truncated conical pin 40 in the
center thereof. The cylindrical element 38 is movable within cavity
36 of the die half head 28 and is seated upon a plate member 46
which in turn is seated upon a block of urethane material 50
resting on a stationary base 52.
The splicing operation is seen performed particularly in FIGS. 4
and 5 wherein the sheets of material 10 and 12 are placed between
the die halves 26 and 28 and the bottom sheet 12 rests upon the pin
40. The upper die 26 is lowered pressing the sheets downwardly and
the cylindrical member 38 also downwardly to its position of FIG. 5
against the resilient and yieldable resistance to the urethane
material 50. When the die halves are closed the sheets of material
are sheared and deformed to provide elongated mating portions 60
and 62 having the general shape including parallel straight
opposite side edges, of the male die element 28. The pin 40 has
penetrated the center area of the lower elongated portion 6 and has
spread the material laterally to form below sheet 12 arcuate
shoulders 64 which prevent the elongated portion 62 from moving
back into the opening 66 and 68 in the sheets of material 10 and 12
left by the shearing deforming and spreading steps. It is seen that
the initial impact of the upper male die half 26 against the pin 40
is not damaging thereto since the pin is yieldable by the presence
of the supporting urethane base. However, the urethane base is of
such a quality that it becomes solid after it has been compressed
by the movement of the pin 40 and cylindrical portion 38 downwardly
to approximately in the position shown in FIG. 5 wherein only the
pin 40 remains above the bottom surface of the cavity 36 in the
lower female die half 27.
In FIG. 8 an alternative series of splices 70 are shown
interconnecting the sheets of material 10 and 12 fed from the rolls
14 and 16. A pair of die halves 72 and 74 are shown having
semielliptical male die portions 76 and 78 which matingly engage
concave semielliptical die cavities 80 and 82 respectively. Since
the die elements 76 and 78 are semielliptical in shape they each
include perpendicular end surfaces 84 and 86 which are
perpendicular to the faces of the die halves 72 and 74 and move in
close registering relationship as seen in FIG. 10 and thereby cut
the sheets of material 10 and 12 to form deformed portions 90 and
92 on one side and portions 94 and 96 on the opposite side of a
plane extending along the line of separation of the pairs of
deformed portions. It is seen that the deformed portion 90 on top
has been deformed downwardly to a position nearly below the lower
portion 96 on the opposite side which has been deformed upwardly an
equal distance. The male die elements 76 and 78 are mirror images
of each other as are the female cavities 80 and 82.
Thus it is seen that the mechanical splices of FIGS. 5, 7 and 10
are simple to make extremely effective in securing together a
plurality of superimposed sheets of metal or other material.
* * * * *