U.S. patent application number 11/071521 was filed with the patent office on 2005-09-01 for diamond blade having rim type cutting tip for use in grinding or cutting apparatus.
Invention is credited to Kim, Soo Kwang, Lee, Chang Hyun, Yoon, So Young.
Application Number | 20050188981 11/071521 |
Document ID | / |
Family ID | 19549497 |
Filed Date | 2005-09-01 |
United States Patent
Application |
20050188981 |
Kind Code |
A1 |
Kim, Soo Kwang ; et
al. |
September 1, 2005 |
Diamond blade having rim type cutting tip for use in grinding or
cutting apparatus
Abstract
A diamond blade having a rim type cutting tip for an apparatus
such as cutting saw machine having a structure which rim type
cutting tip is able to produce cutting chips with relative large
size during the cutting operation so that those chips are easily
discharged outside with reducing the friction with the rim type
cutting tip of the diamond blade, thereby it increases cutting
ability and prevents the chips from dispersing in the air and from
causing the bad affects to user's health and the contamination of
environment. The diamond blade comprises a wheel body and a rim
type cutting tip for cutting or grinding workpieces, which is
disposed on the circumference of the wheel body.
Inventors: |
Kim, Soo Kwang; (Irvine,
CA) ; Yoon, So Young; (Seoul, KR) ; Lee, Chang
Hyun; (Kyongki Do, KR) |
Correspondence
Address: |
VIDAS, ARRETT & STEINKRAUS, P.A.
6109 BLUE CIRCLE DRIVE
SUITE 2000
MINNETONKA
MN
55343-9185
US
|
Family ID: |
19549497 |
Appl. No.: |
11/071521 |
Filed: |
March 3, 2005 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11071521 |
Mar 3, 2005 |
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09786307 |
May 11, 2001 |
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6890250 |
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Current U.S.
Class: |
125/13.01 ;
451/541 |
Current CPC
Class: |
B24D 7/00 20130101; B24D
5/06 20130101; B24D 5/00 20130101; B28D 1/121 20130101; B24D 7/06
20130101 |
Class at
Publication: |
125/013.01 ;
451/541 |
International
Class: |
B28D 001/04; B24B
005/00 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 3, 1999 |
WO |
PCT/KR99/00514 |
Sep 3, 1998 |
KR |
1998-36321 |
Claims
1-8. (canceled)
9. The diamond blade of claim 1 further comprising: said
non-diamond portion having a plurality of depressed portions, the
depressed portions being disposed at predetermined intervals to
cross each other on the inner and outer surfaces of the non-diamond
portion; and a plurality of diamond layers longitudinally disposed
parallel with the rotation direction of the diamond blade
respectively on depressed bottom surfaces of the depressed
portions, and on the inner and outer surfaces of the non-diamond
portion divided by the depressed portions of the non-diamond
portion, wherein the depressed bottom surfaces and the inner and
outer surfaces are parallel to the rotation direction of the
diamond blade.
10. The diamond blade as claimed in claim 9, wherein the bottom
surfaces of the depressed portions of the non-diamond portion are
positioned in a plane between the inner and outer surfaces of the
non-diamond portion.
11. The diamond blade as claimed in claim 9, wherein the depth of
the depressed bottom surfaces of the depressed portions surfaces of
the non-diamond portion is less than a half of the thickness of the
non-diamond portion.
12. The diamond blade as claimed in claim 9, wherein the diamond
particles in each diamond layer of the rim type cutting tip are
distributed in a predetermined pattern or arrangement.
13. The diamond blade as claimed in claim 12, wherein the diamond
particles in each diamond layer of the rim type cutting tip are
distributed in a single layer with grid shaped spots.
14. The diamond blade as claimed in claim 12, wherein the diamond
particles in each diamond layer of the rim type cutting tip are
distributed in a double layer with grid shaped spots.
15. The diamond blade as claimed in claim 9, wherein the diamond
particles in each diamond layer of the rim type cutting tip are
randomly distributed.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a diamond blade for use in
apparatus such as a cutting saw machine for grinding or cutting
crushable materials such as brick, concrete, granite, marble, etc.,
and more particularly to a diamond blade having rim type cutting
tip in which at least two diamond layers are longitudinally
disposed along the rotation direction of the blade to form
microscopic linear cutting grooves to cause portions of the
crushable materials between the cutting grooves to be crushed in
chips of relative large size by non-diamond portion of the cutting
tip during cutting operation and thereby to enhance cutting ability
of the blade and to prevent crushed chips dispersing easily in the
air and giving rise to the bad effects to user's health and the
contamination of environment.
[0002] A conventional diamond blade 1 for use in apparatus for
cutting crushable materials such as cutting saw machine comprises
steel wheel body 2 connected with a shaft of electric motor, and
rim type cutting tip 3 disposed circumferentially and fixedly on
the steel wheel body 2, as shown in FIG. 1. Rim type cutting tip 3
is fabricated by mixing particles of diamond and grinding
materials, particles of metals composing of cobalt, nickel, bronze,
copper, etc., and particles of resin or ceramic and forming a rim
of given shape out of the mixed particles by plastic working
including press work.
[0003] Thus, diamond particles 4 are randomly distributed in the
inside and surfaces of rim type cutting tip 3 as shown in FIG.
3.
[0004] In the blade 1, upper surface of rim type cutting tip 3
contacts with corresponding surface portion of crushable materials
18 to be cut and grinds it to form cutting slot 16 in crushable
materials during cutting operation as shown in FIG. 3.
[0005] Minute chips produced by cutting operation of rim type
cutting tip 3 are gathered in cutting slot 16 and then discharged
from there to outside by the rotation of rim type cutting tip
3.
[0006] However, since the blade 1, i.e., upper surface of rim type
cutting tip 3 has same shape and material composition on the whole,
both edges 15 of upper surface contacting with side wall and bottom
of cutting slot 16 formed in crushable materials 18 during cutting
operation are defaced faster than center 17 thereof contacting only
with bottom of cutting slot 16 of crushable materials 18.
[0007] Accordingly, the contacting area between upper surface of
rim type cutting tip 3 and crushable materials 18 to be cut is
enlarged to increase resistance of crushable materials 18 and
thereby be able to induce poor cutting and decrease cutting ability
and life of blade 1.
[0008] Further, since size of chips produced during cutting
operation is very minute, these chips are easy to remain in cutting
slot 16 of crushable materials 18 to prevent upper surface of rim
type cutting tip 3 grinding bottom of cutting slot 16 and thereby
decrease cutting ability. Also, in case of those minute chips
discharged from cutting slot 16 are dispersed in the air, it gave
rise to the bad effects to user's health and the contamination of
environment.
[0009] To improve these problem, there has been proposed a diamond
blade 11 that a plurality of depressed portions 19 are at given
intervals formed in inner and outer surfaces of rim type cutting
tip 13, as shown in FIG. 2.
[0010] By virtue of this blade, discharging of minute chips
remaining in cutting slot of crushable materials causing rim type
cutting tip to be defaced during cutting operation has been
improved, but defacement of both edges of upper surface to induce
poor cutting and decrease cutting ability and life of blade,
producing very minute chips to decrease cutting ability, and
dispersing produced minute chips in the air to give rise to the bad
effects to user's health and the contamination of environment are
still remained in problems to solve.
SUMMARY OF THE INVENTION
[0011] It is an object of the present invention to provide a
diamond blade for use in apparatus such as a cutting saw machine
for cutting crushable materials such as brick, concrete, granite,
marble, etc., having rim type cutting tip in which at least two
diamond layers are longitudinally disposed along the rotation
direction of the blade to form microscopic cutting grooves in the
crushable materials during cutting operation and thereby to cause
portion of crushable materials between the cutting grooves to be
easily crushed by non-diamond portion of the rim type cutting tip
to enhance cutting ability of the blade.
[0012] It is another object of the present invention to provide a
diamond blade for use in apparatus such as cutting saw machine
having a structure which rim type cutting tip is able to produce
cutting chips with relative large size during cutting operation so
that those chips are easily discharged outside with reducing the
friction with cutting tip of blade, thereby to increase cutting
ability and to prevent those chips dispersing in the air and giving
rise to the bad effects to user's health and the contamination of
environment.
[0013] It is the other object of the present invention to provide a
diamond blade or use in apparatus such as cutting saw machine
having rim type cutting tip which diamond particles in diamond
layer thereof are distributed in a given pattern to reduce the
amount of diamond particles used and thereby reduce the
manufacturing cost of blade.
[0014] To accomplish these objects, a diamond blade for use in
apparatus for grinding or cutting crushable materials according to
the present invention comprises a wheel body connected with a shaft
of electric motor, and rim type cutting tip for grinding or cutting
crushable materials disposed on the circumference of wheel body and
composed of at least two diamond layers longitudinally disposed
parallel with the rotation direction of the blade in which diamond
particles are included, and non-diamond portion disposed between
the diamond layers in which diamond particles are not included.
[0015] In this embodiment of the present invention, diamond layers
are disposed each other at predetermined intervals perpendicular
with the rotation direction of the blade.
[0016] It is desirable that diamond layers are disposed only on
inner and outer surface of rim type cutting tip.
[0017] Alternatively, diamond particles in each diamond layer of
rim type cutting tip are distributed in a given pattern or
arrangement such a single or double layer figure with grid shaped
spots.
[0018] Also, in the non-diamond portion of rim type cutting tip,
diamond particles can be distributed in the density lower than that
of diamond layers.
[0019] In the other embodiment of the present invention, a diamond
blade for use in apparatus for grinding or cutting crushable
materials comprises a wheel body connected with a shaft of electric
motor, and rim type cutting tip for grinding or cutting crushable
materials disposed on the circumference of wheel body and composed
of non-diamond portion having a plurality of depressed portions
disposed at predetermined intervals to cross each other in inner
and outer surfaces of non-diamond portion, and a plurality of
diamond layers longitudinally disposed parallel with the rotation
direction of the blade respectively on bottom surfaces of depressed
portions of non-diamond portion and inner and outer surfaces of
non-diamond portion divided by depressed portions thereof.
[0020] In this embodiment of the present invention, it is desirable
that bottom surfaces of depressed portions of non-diamond portion
are positioned in the plane forming the center between inner and
outer surfaces of non-diamond portion to let diamond layers
disposed thereon to form one cutting line during the cutting
operation of blade.
[0021] Also, the depth of all bottom surfaces of depressed portions
of inner and outer surfaces of non-diamond portion can be set up to
be less than a half of the thickness of non-diamond portion to let
diamond layers disposed thereon to form at least two linear cutting
line during the cutting operation of blade.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above objects and other advantages of the present
invention will become more apparent by describing in detail
preferred embodiments thereof with reference to the attached
drawings in which:
[0023] FIG. 1 is a front view of one conventional diamond blade for
use in cutting saw machine in which diamond particles are randomly
distributed in rim type cutting tip thereof;
[0024] FIG. 2 is a front view of the other conventional diamond
blade in which diamond particles are randomly distributed in rim
type cutting tip thereof and a plurality of depressed portions are
disposed in inner and outer surfaces of rim type cutting tip
thereof;
[0025] FIG. 3 is a partial cross-sectional view of the conventional
diamond blade shown in FIG. 1 to illustrate state in which rim type
cutting tip thereof is operated;
[0026] FIG. 4 is a perspective view of diamond blade for use in
cutting saw machine according to one preferred embodiment of the
present invention which two diamond layers are longitudinally
disposed respectively in inner and outer surfaces of non-diamond
portion of rim type cutting tip to form two microscopic linear
cutting grooves in the crushable materials during cutting
operation;
[0027] FIG. 5 is a partial cross-sectional view of the diamond
blade of the present invention taken along line A-A of FIG. 4 to
illustrate state which rim type diamond cutting tip is
operated;
[0028] FIG. 6 is a perspective view of a diamond blade for use in
cutting saw machine according to the other embodiment of the
present invention in which a plurality of diamond layers are
longitudinally disposed respectively on bottom surfaces of
depressed portions of non-diamond portion and inner and outer
surfaces of non-diamond portion and the depth of bottom surfaces of
depressed portions of non-diamond portion is a half of the entire
thickness of non-diamond portion;
[0029] FIG. 7 is a partial cross-sectional view of the diamond
blade of the present invention overlapping cross-sections taken
along lines B-B and C-C of FIG. 6 to illustrate state which rim
type diamond cutting tip is operated;
[0030] FIG. 8 is a perspective view of diamond blade of the present
invention which the depth of bottom surfaces of depressed portions
of non-diamond portion is less than a half of the entire thickness
of non-diamond portion;
[0031] FIG. 9 is a partial perspective view of diamond blade of the
present invention shown in FIG. 8; and
[0032] FIG. 10 is a partial cross-sectional view of the diamond
blade of the present invention overlapping cross-sections taken
along lines E-E and F-F of FIG. 9 to illustrate state which rim
type diamond cutting tip is operated.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0033] In several embodiments of this invention described below
with reference to the accompanying drawings, the invention is
applied to cutting saw machine.
[0034] Referring to FIG. 4, there is illustrated diamond blade 31
having rim type cutting tip 33 according to one preferred
embodiment of the present invention for use in apparatus for
grinding or cutting crushable materials such as cutting saw
machine.
[0035] Diamond blade 31 for cutting saw machine comprises wheel
body 32 connected with a shaft of electric motor, and rim type
cutting tip 33 for cutting or grinding crushable materials fixedly
disposed circumferentially on the wheel body 32.
[0036] Rim type cutting tip 33 comprises two thin diamond layers 38
and 38' longitudinally disposed respectively in inner and outer
surfaces thereof parallel with the rotation direction of the blade
31, and non-diamond portion 35 disposed between two diamond layers
38 and 38', as shown in FIGS. 4 and 5.
[0037] Thin diamond layers 38 and 38' are composed of particles of
diamond and grinding material, particles of metals composing of
cobalt, nickel, bronze, copper, etc., and particles of resin or
ceramic.
[0038] Particles 39 of diamond in thin diamond layers 38 and 38'
are randomly distributed, or in a given pattern or arrangement such
a single or double layer figure with grid shaped spots to reduce
the amount of diamond particles used.
[0039] Non-diamond portion 35 is composed of grinding materials,
metals such as cobalt, nickel, bronze, copper, etc., and resin or
ceramic.
[0040] Thin diamond layers 38 and 38' function to prevent edge area
of upper surface of rim type cutting tip 33 defacing and to form
two microscopic linear cutting grooves 37' and 37" in the crushable
materials 37 during cutting operation, as shown in FIG. 5. Thus,
portion 40 of crushable materials 37 between two cutting grooves
37' and 37" can be easily crushed by small friction and rotation
impact power of non-diamond portion 35 and thereby non-diamond
portion 35 of rim type cutting tip 33 is able to produce cutting
chips with relative large size during cutting operation so that
those chips are easily discharged outside with reducing the
friction with rim type cutting tip 33 of blade, thereby to increase
cutting ability and to prevent it dispersing in the air.
[0041] In this embodiment of the present invention, it is noted
that rim type cutting tip 33 can be substituted by cutting tip
composed of three or four thin diamond layers longitudinally
disposed therein parallel with the rotation direction of the blade
respectively to form three or four microscopic linear cutting
grooves in the crushable materials during cutting operation, and
non-diamond portions disposed between the three or four diamond
layers.
[0042] The diamond layers are each other disposed at predetermined
intervals perpendicular with the rotation direction of the blade
between non-diamond portions of cutting tip.
[0043] In this case, portion of crushable materials between the
microscopic linear cutting grooves can be easily crushed by
friction and rotation impact power smaller than that of non-diamond
portion 35 of rim type cutting tip 33 having two thin diamond
layers 38 and 38'.
[0044] Also, in the non-diamond portion of rim type cutting tip,
diamond particles can be distributed in the density lower than that
of diamond layers of rim type cutting tip.
[0045] Referring to FIGS. 6 and 7, there are illustrated diamond
blade 41 according to the other preferred embodiment of the present
invention for use in apparatus for cutting and drilling crushable
materials such as cutting saw machine.
[0046] Diamond blade 41 for cutting saw machine comprises wheel
body 42 connected with a shaft of electric motor, and rim type
cutting tip 43 disposed fixedly on the circumference of wheel body
Rim type cutting tip 43 has non-diamond portion 45 having a
plurality of depressed portions 44 disposed at predetermined
intervals to cross each other in inner and outer surfaces of
non-diamond portion 45.
[0047] Rim type cutting tip 43 further includes a plurality of
diamond layers 48, 48', and 48" longitudinally disposed parallel
with the rotation direction of the blade 41 respectively on bottom
surfaces of depressed portions 44 of non-diamond portion 45 and
inner and outer divided surfaces of non-diamond portion 45 divided
by depressed portions 44, as shown in FIG. 6.
[0048] Bottom surfaces of depressed portions 44 of non-diamond
portion 45 are positioned on the plane forming the center between
inner and outer surfaces of non-diamond portions 45 to let diamond
layers 48' disposed thereon to form one microscopic linear cutting
groove 47" in crushable materials 47 during the cutting operation
of blade 41, as shown in FIG. 7.
[0049] Thus, diamond layers 48, 48', and 48" on bottom surfaces of
depressed portions 44 of non-diamond portion 45 and inner and outer
surfaces of non-diamond portion 45 form three microscopic linear
cutting grooves 47', 47", 47' " in crushable materials 47 to let
the protruded portions 50 and 50' of crushable materials 47 between
the microscopic linear cutting grooves 47, 47', 47" to be easily
crushed by small friction and rotation impact power of non-diamond
portion 45 during the cutting operation of blade 41, as shown in
FIG. 7.
[0050] Also, in the non-diamond portion 45 of rim type cutting tip
43, diamond particles can be distributed in the density lower than
that of diamond layers 48, 48' and 48".
[0051] Alternatively, in this embodiment of the present invention,
the depth of bottom surfaces of depressed portions 54 in
non-diamond portion 55 can be less than a half of the entire
thickness of non-diamond portion 55 to let diamond layers 58' and
58" disposed thereon to form two microscopic linear cutting grooves
57" and 57" ' in crushable materials 57 during the cutting
operation of blade 51, as shown in FIG. 10.
[0052] Thus, in this case, diamond layers 58, 58', 58", and 58" '
on inner and outer surfaces of non-diamond portion 55 and bottom
surfaces of depressed portions 54 thereof form four microscopic
linear cutting grooves 57', 57", 57' ' and 57" " in crushable
materials 57 to let protruded portions 60, 60' and 60" of crushable
materials 57 between the cutting grooves 57', 57", 57' ' and 57" "
to be easily crushed by small friction and rotation impact power of
non-diamond portions 55 during the cutting operation of blade 51,
as shown in FIG. 10.
[0053] Operation of diamond blades having rim type cutting tip for
use in apparatus such as cutting saw machine according to
embodiments of the present invention will de described,
hereinafter.
[0054] Referring to FIG. 4, there is illustrated the operation of
diamond blades 31 of one embodiment of the present invention which
two thin diamond layers 38 and 38' are longitudinally disposed
respectively in inner and outer surfaces of rim type cutting tip
33. At first, when wheel body 32 is rotated by an electric motor
connected with a shaft thereof to cut crushable materials 37 such
as brick, concrete, granite, marble, etc., cutting tip 33 begins to
grind crushable materials 37 to form a cutting slot 36 therein
along a predetermined line thereon.
[0055] At this time, since thin diamond layers 38 and 38' including
particles 39 of diamond are disposed in inner and outer surfaces of
cutting tip 33, both edges of cutting tip 33 are defaced less than
center thereof and thereby two microscopic linear cutting grooves
37' and 37" are formed in the cutting slot 36 of crushable
materials 37, as shown in FIG. 5.
[0056] By forming cutting grooves 37' and 37", portion 40 of
crushable materials 37 therebetween is weakened and easily crushed
by small friction and rotation impact power of non-diamond portion
35. Thus, non-diamond portion 35 of cutting tip 33 is able to
produce cutting chips with relative large size and produced chips
are easily discharged outside with reducing the friction with
cutting tip 33 of blade 31, thereby to increase cutting ability and
to prevent produced chips dispersing in the air.
[0057] In this way, by repeating the operation of cutting tip 33 of
diamond blade 31, cutting crushable materials 37 along the
predetermined line thereon is completed.
[0058] Referring to FIGS. 7 and 10, there are illustrated the
operation of diamond blades 41 and 51 of the other embodiment of
the present invention.
[0059] The operation of these diamond blades 41 and 51 is same that
of the diamond blade 31 of embodiment noted above expect that
diamond layers 48, 48", and 48", or 58, 58', 58", 58" ', and 58" "
on inner and outer surfaces of non-diamond portion 45 or 55 and
bottom surfaces of depressed portions 44 or 54 form three or four
linear cutting grooves 47', 47", and 47" ', or 57', 57", 57' ', and
57" " in crushable materials 47 or 57.
[0060] As apparent from the foregoing description, it can be
appreciated that the present invention provides a diamond blade
having rim type cutting tip which at least two diamond layers are
longitudinally disposed along the rotation direction of the blade
to form at least two microscopic linear cutting grooves in the
crushable materials during cutting operation and thereby to cause
portions of crushable materials between the cutting grooves to be
easily crushed by non-diamond portions of cutting tip to enhance
cutting ability of the blade.
[0061] Also, the present invention provides a diamond blade having
a structure which cutting tip are able to produce cutting chips
with relative large size during cutting operation so that those
chip are easily discharged outside with reducing the friction with
cutting tip of blade, thereby to increase cutting ability and to
prevent it dispersing in the air and giving rise to the bad effects
to user's health and the contamination of environment.
[0062] Also, the present invention provides a diamond blade having
a rim type cutting tip which diamond particles in diamond layer
thereof are distributed in a given pattern to reduce the amount of
diamond particles used and thereby reduce the manufacturing cost of
blade.
* * * * *