Abstrict 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.
Claims 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. |