Note: Descriptions are shown in the official language in which they were submitted.
METHOD AND SYSTEM FOR PRODUCING ABRASIVE PRODUCTS
FIELD
[0001] The invention relates to the field of abrasive discs.
BACKGROUND
[0002] Abrasive discs are typically constructed by adhesively securing a
plurality
of adhesive pieces to a backer disc from which a quick change connector
extends.
SUMMARY OF THE INVENTION
[0003] Forming one aspect of the invention is an improved method for producing
abrasive products, the abrasive products being of the type having a quick
change
connector protruding therefrom, the connector being one of an interiorly-
threaded
hub, a protruding shaft and an exteriorly-threaded stud. The method is of the
type
wherein a plurality of abrasive pieces are adhesively secured to one another
and to
a backer disc from which the connector protrudes. The improvement comprises
the
connector being formed separately from the backer disc and secured thereto
after
the pieces have been secured to the backer disc.
[0004] Forming another aspect of the invention is an abrasive product. The
abrasive product comprises: a backer disc having a bore; a plurality of
abrasive
pieces secured to one another and to the backer disc by adhesive; and a
connector
formed separately from the backer disc, the connector being one of an
interiorly-
threaded hub, a protruding shaft and an exteriorly-threaded stud.
[0005] According to another aspect of the invention, the connector can be the
threaded hub and be adhesively secured to the backer disc.
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[0006] According to another aspect of the invention, the connector can be the
exteriorly threaded stud.
[0007] According to another aspect of the invention, the bore can be threaded
and the threaded stud can form part of a component which is threadingly
engaged
by the bore.
[0008] According to another aspect of the invention, the threaded stud can
form
one end of a component which has, at the other end, a threaded shaft that
protrudes through the bore and is threadingly received by a nut or retaining
washer.
[0009] According to another aspect of the invention, the connector can be the
shaft.
[0010] According to another aspect of the invention, the backer disc can have
a
threaded bore and the shaft can form part of a component which is threadingly
engaged by the bore.
[0011] According to another aspect of the invention, the shaft can form one
end
of a component which has, at the other end, a threaded rod, the threaded rod
being
in receipt of an interiorly-threaded hub that is adhesively secured to the
backer
disc.
[0012] Other advantages, features and characteristics of the present invention
will become apparent upon review of the following detailed description and the
appended drawings, the latter being briefly described hereinafter.
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BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a view of the components of a system for the production
of
abrasive products according to an embodiment of the invention;
[0014] FIG. 2 is a view of the structures of FIG. 1 from another vantage
point.
[0015] FIG. 3 is an assembly view of portions of the structure of FIG. 1;
[0016] FIG. 4 is a view of the structure of FIG. 3 assembled for adhesive
curing;
[0017] FIG. 5 is a view of a plurality of the structures of FIG. 4 stacked
for
adhesive curing;
[0018] FIG. 6 is a view of an abrasive disc that forms an embodiment of
the
invention;
[0019] FIG. 7 is a view of an abrasive disc that forms an embodiment of
the
invention;
[0020] FIG. 8 is a view of an abrasive disc that forms an embodiment of
the
invention;
[0021] FIG. 9 is a view of an abrasive disc that forms an embodiment of
the
invention;
[0022] FIG. 10 is a view of an abrasive disc that forms an embodiment of the
invention;
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[0023] FIG. 11 is a view of an abrasive disc that forms an embodiment of the
invention;
[0024] FIG. 12 is a view of an abrasive disc that forms an embodiment of the
invention;
[0025] FIG. 13 is a view of an abrasive disc that forms an embodiment of the
invention;
[0026] FIG. 14 is an exploded view of an abrasive disc that forms an
embodiment of the invention; and
[0027] FIG. 15 is a view of an abrasive disc that forms an embodiment of the
invention.
DETAILED DESCRIPTION OF THE EXEMPLARY SYSTEM, METHODS AND
DISKS PRODUCED THEREBY
SYSTEM
[0028] With reference to FIG. 1 and FIG. 2, components that form a system 20
for the production of abrasive products that is illustrative of the invention
are
shown and will be seen to include: backer discs 22,24, abrasive disc 26,
abrasive
pieces 28,30, coupler 32, interiorly-threaded hubs 34,40,42,36,38, mandrels
44,46, retaining washer 48 and adapters 52,54.
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[0029] Backer discs 22, 24, are glass bead reinforced nylon 66, have a
threaded
central bore with a 3/8 -16 UNC thread and a surrounding recess and differ
only in
size. Disc 26 is made of resin bonded abrasive grain and reinforced with
fiberglass
mesh and has a central bore adapted to receive a 3/8-16 UNC threaded shaft in
spaced throughpassing relation.
[0030] Pieces 28,30 are abrasive and of generally conventional construction.
[0031] Coupler 32 is glass bead reinforced nylon 66 or nylon 66 and has a 3/8 -
16 UNC thread 60 (not shown) at one end and an opposing R LOK external thread
62 (not shown).
[0032] Hub 34 is plastic with S LOK internal thread. Hubs 40 and 42 are steel
with S LOK internal thread.
[0033] Hubs 36, 38 are steel.
[0034] Mandrels 44, 46 are steel, each having a shaft at one end and a thread
at
the other. The thread of 44 is one and the same as the thread of 34 or 36. The
thread of 46 is a 3/8 - 16 UNC thread.
[0035] Retaining washer 48 is steel. Nut 50 is steel or reinforced nylon 66.
Both
are adapted to grippingly receive a 3/8 - 16 UNC thread.
[0036] Adapters 52 and 54 are industry standard and will be seen to have, at
one
end, a shaft, and at the other end a socket. Socket 54 is threaded to receive
coupler 32. Socket 52 has a threaded rod that is adapted to threadingly
receive
hub 34, 40, 42 or 36.
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METHODS
Embodiment 1
[0037] This embodiment utilizes backer disc 22, adhesive 56, a plurality of
abrasive pieces 28 and mandrel 46.
[0038] As an initial step in the method, the plurality of abrasive pieces 28
are
secured to one another and to disk 22 by adhesive 56, as indicated by FIG. 3,
and
cured at elevated temperatures to form an abrasive body 58, as shown in FIG.
4.
As the backer disc has a bore, a plurality of abrasive bodies can,
advantageously,
be cured on a spindle, as shown in FIG. 5. The attachment of abrasive pieces
is a
matter of routine to persons of ordinary skill in the art and as such, a
detailed
description thereof is neither required nor provided.
[0039] To produce a mini-disk, the threaded end of mandrel 46 is simply
threadingly engaged in the bore of the disk until such time as flange is
seated in
the recess, as indicated by FIG. 6.
Embodiment 2
[0040] This embodiment (not shown) is identical to that of Embodiment 1 but
disk 24 is used in the place of disk 22 and flaps 30 are used in the place of
flaps 28.
Embodiment 3
[0041] This embodiment uses abrasive body 58 formed of disk 22 or 24 along
with adapter 52 and hub 34,40 or 42. Hub 34,40 or 42 is adhesively secured in
the
recess of the backer disc and threaded into the socket of adapter 52, to form
the
structure of FIG. 7. Hub 34 can also be secured to backing disc 22 or 24 using
friction welding since 22,24 and 34 are made from nylon 66.
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Embodiment 4
[0042] This structure is similar to Embodiment 3 but adapter 54 is used with
coupler 32 and abrasive body 58 to produce the structure of FIG. 8.
Embodiment 5
[0043] In this embodiment, hub 36 is adhesively secured to abrasive body 58
and mandrel 44 is threaded into hub 36 to form the structure of FIG. 9.
Embodiment 6
[0044] In this embodiment, hub 36 is adhesively secured to cutting head 58 to
form the structure of FIG. 10.
Embodiment 7
[0045] This embodiment is similar to the structure of Embodiment 6 but the hub
38 is used to form the structure of FIG. 11
Embodiment 8
[0046] In this embodiment, coupler 32 is threaded into the bore of the backer
disc 22 that forms part of cutting head 58 to form the structure of FIG. 12
Embodiment 9
[0047] This embodiment is similar to Embodiment 8 but an abrasive body formed
of backer disc 24 is used, to produce the structure of FIG. 13.
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Embodiment 10
[0048] This embodiment is similar to Embodiment 8 but hub 34 is used with
abrasive body 58 to produce the structure of FIG. 14.
Embodiment 11
[0049] This embodiment is similar to Embodiment 8 but hub 40 is used with
abrasive body 58 to produce the structure of FIG. 15.
Other variations
[0050] Abrasive disc 26 can be used in substitution for disk 22 or 24, if
desired.
To do so, coupler 32 is passed through the central bore of disc 26 and
captured by
nut 50, as indicated by FIG. 16, or by retaining washer 48 as indicated by
FIG. 17.
[0051] Other variations are of course possible. Accordingly, the invention
should
be understood to be limited only by the accompanying claims, purposively
construed.
Advantages
[0052]
Persons of ordinary skill will readily appreciate that the invention allows,
for the relatively inexpensive production of a relatively wide variety of
abrasive
products resultant from, inter alia, interchangeable parts, many being
commonly
available in the marketplace at low prices, and the stackable nature of the
abrasive
bodies.
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