U.S. patent application number 15/365868 was filed with the patent office on 2017-10-05 for apparatus for mounting blind rivet.
This patent application is currently assigned to Hyundai Motor Company. The applicant listed for this patent is Hyundai Motor Company. Invention is credited to Chang Dong KIM, Jun Hyoung KIM, Min Soo KIM.
Application Number | 20170282237 15/365868 |
Document ID | / |
Family ID | 59925994 |
Filed Date | 2017-10-05 |
United States Patent
Application |
20170282237 |
Kind Code |
A1 |
KIM; Min Soo ; et
al. |
October 5, 2017 |
APPARATUS FOR MOUNTING BLIND RIVET
Abstract
An apparatus for mounting a blind rivet, configured to mount the
blind rivet having a rivet body and a mandrel on a board, may
include a rivet holder accommodating a mandrel therein and pressing
a rivet head towards the board, a mandrel holder positioned inside
the rivet holder and moving separately from the rivet holder to
hold and pull the accommodated mandrel, and an impactor positioned
inside the rivet holder to accommodate the mandrel holder therein
and applying pressure to the mandrel holder holding the mandrel,
thus lifting the mandrel holder together with the mandrel.
Inventors: |
KIM; Min Soo; (Suwon-si,
KR) ; KIM; Chang Dong; (Suwon-si, KR) ; KIM;
Jun Hyoung; (Seongnam-si, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Hyundai Motor Company |
Seoul |
|
KR |
|
|
Assignee: |
Hyundai Motor Company
Seoul
KR
|
Family ID: |
59925994 |
Appl. No.: |
15/365868 |
Filed: |
November 30, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B29C 66/80 20130101;
B29C 66/1122 20130101; B29C 66/21 20130101; B21J 15/105 20130101;
B29C 66/742 20130101; B29C 65/562 20130101; B21J 15/043 20130101;
B29C 66/721 20130101; B21J 15/326 20130101; B29C 66/006 20130101;
B21J 15/147 20130101; B29C 66/41 20130101; B21J 15/10 20130101 |
International
Class: |
B21J 15/10 20060101
B21J015/10 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 5, 2016 |
KR |
10-2016-0041534 |
Claims
1. An apparatus for mounting a blind rivet, configured to mount the
blind rivet having a rivet body and a mandrel on a board, the
apparatus comprising: a rivet holder accommodating a mandrel
therein and pressing a rivet head towards the board; a mandrel
holder positioned inside the rivet holder and moving separately
from the rivet holder to hold and pull the accommodated mandrel; an
impactor positioned inside the rivet holder to accommodate the
mandrel holder therein, and applying pressure to the mandrel holder
holding the mandrel, thus lifting the mandrel holder together with
the mandrel; and a damper attached to either of apart of the
impactor applying pressure to the mandrel holder or a part of the
mandrel holder subjected to pressure.
2. The apparatus according to claim 1, wherein the rivet holder
comprises: an accommodating part accommodating the impactor in a
space formed therein; and a first pressing part formed on a lower
end of the accommodating part, and having a central recess formed
in a shape corresponding to the rivet head, with a through hole
formed in the central recess, the first pressing part pressing the
board and the rivet head down while accommodating the mandrel
therein.
3. The apparatus according to claim 1, wherein the mandrel holder
includes: a holding part including a plurality of pieces that are
spaced apart from each other, and moving horizontally to cause the
plurality of pieces to come near to each other, so that an inside
surface of the holding part is in surface contact with an outside
surface of the mandrel; and a pressed part formed on a lower end of
the holding part, and subjected to pressure applied by the
impactor.
4. The apparatus according to claim 3, wherein the mandrel holder
is configured such that a thickness from an inside surface to an
outside surface thereof is reduced in a direction from a lower
portion of the holding part to the pressed part.
5. The apparatus according to claim 1, wherein, based on a section
taken along a longitudinal direction of the rivet holder, the
mandrel holder and the impactor, the impactor is positioned between
the rivet holder and the mandrel holder.
6. The apparatus according to claim 3, wherein the impactor
includes: a space defining part accommodating the mandrel holder
therein, and defining a space in which the holding part is movable
horizontally.
7. The apparatus according to claim 6, wherein the impactor further
includes: a second pressing part bent to be reduced in width in a
longitudinal direction of the space defining part so that an upper
surface of an end of the second pressing part faces a lower surface
of the pressed part.
8. (canceled)
9. The apparatus according to claim 1, wherein the impactor
momentarily applies pressure to an entire lower end of the mandrel
holder when the mandrel head is fitted into the rivet body by an
upward movement of the mandrel holder holding the mandrel, thus
allowing the mandrel to be separated into the mandrel head and the
mandrel body.
10. The apparatus according to claim 1, wherein, when the mandrel
holder holds the mandrel, the impactor continuously applies uniform
pressure to an entire lower end of the mandrel holder, thus causing
the mandrel fitted into the rivet body to be separated into the
mandrel head and the mandrel body.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] The present application claims priority of Korean Patent
Application No. 10-2016-0041534 filed on Apr. 5, 2016, the entire
contents of which is incorporated herein for all purposes by this
reference.
BACKGROUND OF THE INVENTION
Field of the Invention
[0002] Various embodiments of the present invention relates to an
apparatus for mounting a blind rivet, which applies uniform
pressure to a mandrel holder holding a mandrel in a rivet holder
using an impactor, thus preventing the mandrel from becoming
eccentric when it is separated.
Description of Related art
[0003] A conventional apparatus for mounting a blind rivet
generates a moment by an angle of a fracture surface of a groove
formed in a mandrel according a load that is non-uniformly applied
when the mandrel is cut in the state where the apparatus comes into
close contact with a rivet head. Further, the moment is generated
by a twisted phenomenon resulting from the bending deformation of
the mandrel itself. Therefore, in the case of mounting the rivet on
a board including a composite layer composed of reinforced fiber
and resin, the eccentricity phenomenon of the mandrel generates a
crack in the composite layer and increases a gap between
layers.
[0004] The information disclosed in this Background of the
Invention section is only for enhancement of understanding of the
general background of the invention and should not be taken as an
acknowledgement or any form of suggestion that this information
forms the prior art already known to a person skilled in the
art.
BRIEF SUMMARY
[0005] Various aspects of the present invention are directed to
providing an apparatus for mounting a blind rivet, which applies
uniform pressure to a mandrel holder holding a mandrel in a rivet
holder using an impactor, thus preventing the mandrel from becoming
eccentric when it is separated.
[0006] According to one aspect, there is provided an apparatus for
mounting a blind rivet, configured to mount the blind rivet having
a rivet body and a mandrel on a board, the apparatus including a
rivet holder accommodating a mandrel therein and pressing a rivet
head towards the board; a mandrel holder positioned inside the
rivet holder and moving separately from the rivet holder to hold
and pull the accommodated mandrel; and an impactor positioned
inside the rivet holder to accommodate the mandrel holder therein,
and applying pressure to the mandrel holder holding the mandrel,
thus lifting the mandrel holder together with the mandrel.
[0007] The rivet holder may include an accommodating part
accommodating the impactor in a space formed therein; and a first
pressing part formed on a lower end of the accommodating part,
having a central recess formed in a shape corresponding to the
rivet head, with a through hole formed in the central recess, thus
simultaneously pressing the board and the rivet head down while
accommodating the mandrel therein.
[0008] The mandrel holder may include a holding part including a
plurality of pieces that are spaced apart from each other, and
moving horizontally to cause the plurality of pieces to come near
to each other, so that an inside surface of the holding part is in
surface contact with an outside surface of the mandrel; and a
pressed part formed on a lower end of the holding part, and
subjected to pressure applied by the impactor.
[0009] The mandrel holder may be configured such that a thickness
from an inside surface to an outside surface thereof may be
gradually reduced in a direction from a lower portion of the
holding part to the pressed part.
[0010] When viewed from a section taken in a longitudinal direction
of the rivet holder, the mandrel holder and the impactor, the
impactor may be positioned between the rivet holder and the mandrel
holder.
[0011] The impactor may include a space defining part that
accommodates the mandrel holder therein and defines a space in
which the holding part is movable horizontally.
[0012] The impactor may further include a second pressing part bent
to be reduced in width in a longitudinal direction of the space
defining part, with an upper surface of an end of the second
pressing part facing a lower surface of the pressed part.
[0013] The apparatus may further include a damper attached to
either of a part of the impactor applying pressure to the mandrel
holder or a part of the mandrel holder subjected to pressure.
[0014] The impactor may momentarily apply pressure to an entire
lower end of the mandrel holder under a condition that the mandrel
head may be fitted into the rivet body by an upward movement of the
mandrel holder holding the mandrel, thus allowing the mandrel to be
separated into the mandrel head and the mandrel body.
[0015] Under a condition that the mandrel holder may hold the
mandrel, the impactor may continuously applies uniform pressure to
an entire lower end of the mandrel holder, thus causing the mandrel
fitted into the rivet body to be separated into the mandrel head
and the mandrel body.
[0016] The methods and apparatuses of the present invention have
other features and advantages which will be apparent from or are
set forth in more detail in the accompanying drawings, which are
incorporated herein, and the following Detailed Description, which
together serve to explain certain principles of the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG. 1 is a view illustrating an apparatus for mounting a
blind rivet according to an exemplary embodiment of the present
invention;
[0018] FIG. 2 is a view illustrating a blind rivet according to an
exemplary embodiment of the present invention;
[0019] FIG. 3 is a view illustrating the apparatus for mounting the
blind rivet according to the exemplary embodiment of the present
invention;
[0020] FIG. 4 is a view illustrating an operation of a mandrel
holder according to an exemplary embodiment of the present
invention;
[0021] FIG. 5 is a view illustrating an operation of the mandrel
holder according to the exemplary embodiment of the present
invention;
[0022] FIG. 6 is a view illustrating an operation of an impactor
according to an exemplary embodiment of the present invention;
[0023] FIG. 7 is a view illustrating an operation of the impactor
according to the exemplary embodiment of the present invention;
and
[0024] FIG. 8 is a view illustrating the apparatus for mounting the
blind rivet according to the exemplary embodiment of the present
invention.
[0025] It should be understood that the appended drawings are not
necessarily to scale, presenting a somewhat simplified
representation of various features illustrative of the basic
principles of the invention. The specific design features of the
present invention as disclosed herein, including, for example,
specific dimensions, orientations, locations, and shapes will be
determined in part by the particular intended application and use
environment.
[0026] In the figures, reference numbers refer to the same or
equivalent parts of the present invention throughout the several
figures of the drawing.
DETAILED DESCRIPTION
[0027] Reference will now be made in detail to various embodiments
of the present invention(s), examples of which are illustrated in
the accompanying drawings and described below. While the
invention(s) will be described in conjunction with exemplary
embodiments, it will be understood that the present description is
not intended to limit the invention(s) to those exemplary
embodiments. On the contrary, the invention(s) is/are intended to
cover not only the exemplary embodiments, but also various
alternatives, modifications, equivalents and other embodiments,
which may be included within the spirit and scope of the invention
as defined by the appended claims.
[0028] Hereinbelow, exemplary embodiments of the present invention
will be described in detail with reference to the accompanying
drawings.
[0029] As illustrated in FIG. 1, an apparatus for mounting a blind
rivet configured to mount a blind rivet having a rivet 30 and a
mandrel 40 on a board 10, according to an exemplary embodiment of
the present invention, includes a rivet holder 100, a mandrel
holder 200, and an impactor 300. The rivet holder accommodates the
mandrel 40 therein and presses a rivet head 32 towards the board
10. The mandrel holder is positioned inside the rivet holder 100,
and moves separately from the rivet holder 100 to hold and pull the
accommodated mandrel 40. The impactor is positioned inside the
rivet holder 100 to accommodate the mandrel holder 200, and applies
pressure to the mandrel holder 200 holding the mandrel 40, thus
lifting the mandrel holder 200 together with the mandrel 40.
[0030] Generally, as illustrated in FIG. 2, the rivet 30
constituting the blind rivet has upper and lower holes, and is
divided into a cylindrical rivet body 31 through which the upper
and lower holes simultaneously pass, and a circular flange-shaped
rivet head 32 which is bent perpendicularly from an upper end of
the rivet body 31.
[0031] Further, the mandrel 40 constituting the blind rivet is
divided into a mandrel body 41 and a mandrel head 42. The mandrel
body has a predetermined cross-sectional area, and passes through a
through hole of the rivet body 31. The mandrel head does not pass
through the upper and lower holes of the rivet body 31 based on a
groove that is smaller in cross-sectional area than the mandrel
body 41, and is larger in cross-sectional area than the upper and
lower holes to be stopped by the lower hole of the rivet body
31.
[0032] As illustrated in FIG. 3, a space is defined in the rivet
holder 100. Further, a hole is formed in a lower end in a
longitudinal direction thereof to allow the mandrel 40 to be
inserted therein. Portions other than the portion in which the hole
is formed may press the rivet head 32 towards the board 10 and then
insert the rivet body 31 into the board 10.
[0033] As illustrated in FIG. 4 and FIG. 5, the mandrel holder 200
is positioned inside the rivet holder 100. The mandrel holder 200
serves to hold the mandrel 40 and pull it upwards. As the mandrel
holder 200 holds and pulls the mandrel 40, the mandrel is fitted
into the rivet body 31 while the mandrel head 42 deforms the lower
hole of the rivet body 31 that is smaller in cross-sectional area
than the mandrel head 42.
[0034] As described above, the mandrel holder 200 may be moved in a
vertical direction to hold and pull the mandrel 40, and may be
moved in a horizontal direction to hold the mandrel 40 after the
mandrel 40 accommodated in the rivet holder 100 is received
again.
[0035] Since the mandrel holder 200 may move in the vertical
direction separately from the rivet holder 100, the rivet holder
100 presses the rivet head 32 towards the board 10 and
simultaneously the mandrel holder 200 moves upwards while holding
the mandrel 40, thus allowing the mandrel 40 to be smoothly fitted
into the rivet body 31.
[0036] The impactor 300 is arranged inside the rivet holder 100 to
accommodate the mandrel holder 200 therein. Therefore, when viewed
from a section taken in a longitudinal direction of the rivet
holder 100, the mandrel holder 200 and the impactor 300, the
impactor 300 is positioned between the rivet holder 100 and the
mandrel holder 200.
[0037] As illustrated in FIG. 6, the impactor 300 may move in the
vertical direction separately from the rivet holder 100 and the
mandrel holder 200. Therefore, in the state where the rivet holder
100 presses the rivet head 32 downwards and the mandrel holder 200
holds the mandrel 40, the impactor 300 moves upwards, thus pressing
the mandrel holder 200 and lifting the mandrel holder 200 that
holds the mandrel 40.
[0038] As illustrated in FIG. 7, as the mandrel holder 200 lifts,
fracture is guided from the groove formed in the mandrel 40, so
that only the mandrel body 41 is separated in the state where the
mandrel head 42 is fitted into the rivet body 31.
[0039] The apparatus for mounting the blind rivet according to an
exemplary embodiment of the present invention may be operated as
follows: after the mandrel head 42 is fitted into the rivet body 31
by the upward movement of the mandrel holder 200 holding the
mandrel 40, the impactor 300 momentarily presses the mandrel holder
200, so that the mandrel head 42 and the mandrel body 41 are
separated from each other based on the groove, and the blind rivet
is mounted to the board 10.
[0040] Further, the impactor 300 lifts the mandrel holder 200
holding the mandrel 40 upwards so that the mandrel head 42 is
fitted into the rivet body 31, then the mandrel head 42 and the
mandrel body 41 are separated from each other based on the groove,
and the blind rivet is mounted to the board 10.
[0041] Since the entire lower end of the mandrel holder 200 may be
uniformly pressed by the vertical movement of the impactor 300, the
generation of the moment by the angle of the fracture surface of
the groove formed in the mandrel 40 due to load that is
non-uniformly applied when the mandrel 40 is cut, and the
generation of the moment by the twisted phenomenon due to the
bending deformation of the mandrel 40 itself are suppressed, thus
preventing the mandrel head 42 from being eccentric.
[0042] Unlike the related art, even if the blind rivet is mounted
to the board 10 made by combining a composite layer including a
reinforced fiber and resin with a metallic layer, or to the board
10 including only the composite layer, it is possible to prevent a
reinforced fiber of the board 10 from being damaged and to cut the
mandrel 40 without eccentricity, thus preventing a gap between the
layers of the board 10 from being increased and preventing cracks
from occurring.
[0043] Further, it is possible to expect the effect of hardening
the composite layer and the metallic layer attached to the
composite layer via an adhesive due to the repeated hitting of the
impactor 300, in addition to mitigating stress concentration on the
composite layer.
[0044] In the apparatus for mounting the blind rivet according to
an exemplary embodiment of the present invention, as illustrated in
FIG. 3, the rivet holder 100 may include an accommodating part 110
that accommodates the impactor 300 in a space formed therein, and a
first pressing part 120 that is formed on a lower end of the
accommodating part 110, is provided with a central recess formed in
a shape corresponding to the rivet head 32, has a through hole in
the central recess, and simultaneously presses the board 10 and the
rivet head 32 down while accommodating the mandrel 40 therein.
[0045] The accommodating part 110 has a cylindrical shape and has a
space to accommodate the impactor 300 therein. Further, the first
pressing part 120 is formed on the lower end of the accommodating
part 110 to delimit an internal space. A central recess 121 is
formed in a central portion of the first pressing part 120 to be
indented towards the internal space. Preferably, since the central
recess 121 is indented to correspond to the rivet head 32 and the
through hole is formed in a central portion of the central recess
121 to allow the mandrel 40 to be inserted, the rivet holder 100
may simultaneously press the board 10 and the rivet head 32 down
while receiving the mandrel 40 therein.
[0046] In the case where the central recess 121 is not provided,
the imbalance of the load may occur in a process where the mandrel
holder 200 holds and pulls the mandrel 40 while the first pressing
part 120 presses the rivet head 32 or in a process where the
impactor 300 applies pressure to the mandrel holder 200 holding the
mandrel 40.
[0047] The central recess formed in the shape corresponding to that
of the rivet head 32 allows the rivet head 32 and the board 10 to
be simultaneously pressed, thus causing the rivet holder 100 to be
stably positioned. Therefore, the operation of the impactor 300
causes the mandrel 40 to be separated, thus preventing the
eccentricity of the mandrel.
[0048] Meanwhile, in the apparatus for mounting the blind rivet
according to an exemplary embodiment of the present invention, as
illustrated in FIG. 4, the mandrel holder 200 includes a holding
part 210 and a pressed part 220. The holding part includes a
plurality of pieces that are spaced apart from each other, moves
horizontally to cause the plurality of pieces to come near to each
other, so that an inside surface of the holding part is in surface
contact with an outside surface of the mandrel 40. The pressed part
220 is formed on a lower end of the holding part 210, and is
subjected to pressure applied by the impactor 300.
[0049] The mandrel holder 200 may move in the impactor 300 to hold
the mandrel 40. Thus, the holding part 210 holding the mandrel 40
includes the plurality of pieces to be movable vertically and
horizontally. The holding part moves downwards in the vertical
direction until the mandrel 40 is positioned between the plurality
of pieces, and then moves horizontally so that the plurality of
pieces come near to each other, thus holding the mandrel 40.
[0050] In this regard, the inside surfaces of the plurality of
pieces coming into contact with the mandrel 40 are formed in a
curved shape to correspond to an outside surface of the mandrel 40,
so that the inside surfaces contact with an outside surface of the
mandrel 40 when the holding part 210 holds the mandrel 40, thus
allowing the mandrel 40 to be pulled up without being missed.
[0051] Preferably, to prevent the mandrel 40 from being removed
from the holding part 210, corresponding uneven structures may be
formed on the inside surface of the holding part 210 and an outside
surface of the mandrel 40.
[0052] Since the pressed part 220 is formed on the lower end of the
holding part 210 to be subjected to the pressure, uniform load is
transmitted to the mandrel holder 200 when the mandrel holder 200
is pressed by the upward movement of the impactor 300.
[0053] the mandrel holder is configured such that a thickness from
the inside surface to an outside surface is reduced in a direction
from a lower portion of the holding part 210 to the pressed part
220, thus causing the load generated by the pressing of the
impactor 300 to be concentrated on the pressed part 220, and
preventing the mandrel 40 from being eccentric.
[0054] In the apparatus for mounting the blind rivet according to
an exemplary embodiment of the present invention, as illustrated in
FIG. 6, the impactor 300 may include a space defining part 310 that
accommodates the mandrel holder 200 therein and defines a space in
which the holding part 210 is movable horizontally, and a second
pressing part 320 that is bent to be gradually reduced in width in
a longitudinal direction of the space defining part 310. An upper
surface of an end of the second pressing part 320 faces a lower
surface of the pressed part 220.
[0055] The space defining part 310 defines the space that
accommodates the mandrel holder 200 therein and allows the holding
part 210 of the mandrel holder 200 to move horizontally and hold
the mandrel 40. The space defining part 310 may move vertically to
press and lift the mandrel holder 200 holding the mandrel 40.
[0056] The second pressing part 320 is formed on a lower portion of
the space defining part 310, and is configured to be closed such
that ends in a longitudinal direction of the space defining part
310 come near to each other. When the ends of the second pressing
part 320 approach each other, the upper surfaces of the ends face
the pressed part 220. Therefore, it is possible to press the
pressed part 220 of the mandrel holder 200 holding the mandrel 40
with uniform load.
[0057] Therefore, the mandrel simultaneously contacts with the
entire second pressing part 320 and the entire pressed part 220 to
apply pressure to the pressed part 220 with the uniform load.
[0058] As illustrated in FIG. 8, the apparatus for mounting the
blind rivet according to an exemplary embodiment of the present
invention may further include a damper 400 that is attached to
either of a part of the impactor 300 applying pressure to the
mandrel holder 200 or a part of the mandrel holder 200 subjected to
pressure.
[0059] The damper 400 includes an elastic material including
rubber, and is attached to the part of the impactor 300 applying
pressure to the mandrel holder 200 or the part of the mandrel
holder 200 subjected to pressure, preferably, to the second
pressing part 320 or the pressed part 220, thus preventing the
impactor 300 and the mandrel holder 200 from being damaged when the
impactor 300 applies the pressure.
[0060] The apparatus for mounting the blind rivet according to an
exemplary embodiment of the present invention causes the impactor
300 to momentarily apply pressure to the entire lower end of the
mandrel holder 200 under the condition that the mandrel head 42 is
fitted into the rivet body 31 by the upward movement of the mandrel
holder 200 holding the mandrel 40, thus allowing the mandrel 40 to
be separated into the mandrel head 42 and the mandrel body 41.
[0061] Alternatively, under the condition that the mandrel holder
200 holds the mandrel 40, the impactor 300 continuously applies
uniform pressure to the entire lower end of the mandrel holder 200,
thus causing the mandrel 40 to be fitted into the rivet body 31 and
then be separated into the mandrel head 42 and the mandrel body
41.
[0062] As having described, various aspects of the present
invention are directed to providing an apparatus for mounting a
blind rivet, which applies uniform pressure to a mandrel holder
holding a mandrel in a rivet holder using an impactor, thus
preventing the mandrel from becoming eccentric when it is
separated.
[0063] Further, even when a blind rivet is mounted on a board
including a composite layer composed of reinforced fiber and resin,
a mandrel may be cut by upward movement, thus preventing a crack of
the composite layer from being generated and preventing a gap
between layers from being increased. Owing to the minimization of a
mandrel length, the cost of a blind rivet may be reduced.
[0064] For convenience in explanation and accurate definition in
the appended claims, the terms "upper", "lower", "inner", "outer",
"up", "down", "upper", "lower", "upwards", "downwards", "front",
"rear", "back", "inside", "outside", "inwardly", "outwardly",
"interior", "exterior", "inner", "outer", "forwards", and
"backwards" are used to describe features of the exemplary
embodiments with reference to the positions of such features as
displayed in the figures.
[0065] The foregoing descriptions of specific exemplary embodiments
of the present invention have been presented for purposes of
illustration and description. They are not intended to be
exhaustive or to limit the invention to the precise forms
disclosed, and obviously many modifications and variations are
possible in light of the above teachings. The exemplary embodiments
were chosen and described in order to explain certain principles of
the invention and their practical application, to thereby enable
others skilled in the art to make and utilize various exemplary
embodiments of the present invention, as well as various
alternatives and modifications thereof. It is intended that the
scope of the invention be defined by the Claims appended hereto and
their equivalents.
* * * * *