JP2596431B2 - Rotary blade manufacturing method - Google Patents

Description

The present invention relates to concrete used for civil engineering and construction work,
The present invention relates to a rotary blade for cutting asphalt, bricks, tiles, various stone materials, and the like.

(Prior Art) Conventionally, a rotary blade 1 for cutting concrete, asphalt, brick, tile, various kinds of stones, and the like used for civil engineering and construction is formed in a disk shape as shown in FIG. At the center of the rotary blade main body 1a, a mounting hole 2 for mounting a drive shaft is formed.
And diamond on the outer peripheral surface 4 between the escape grooves 3.
A brazing blade 5 formed by sintering a cemented carbide or a super-hard ceramic is used.

The rotary blade 1 is rotated while rotating on concrete, asphalt, brick, tile, or various stones, and the like.
To perform a predetermined cutting operation. In addition,
It is also used for drilling a square hole as a special use, as disclosed in JP-A-55-5858.

(Problems to be Solved by the Invention) In the conventional rotary blade 1 described above, since the rotary blade body 1a is formed of one sheet material, a radial fluid passage is formed in the rotary blade body 1a. There was a problem that it was difficult to do.

The present invention has been made in view of the above problems, and a technical problem set for the purpose of solving the above problems is to form a rotary blade main body having a radial fluid passage therein. An object of the present invention is to provide a method for manufacturing a rotary blade.

(Means for Solving the Problems) In the present invention, in forming a method for manufacturing a rotary blade as a means for solving the above problems, the intermediate plate material is divided and formed using a fluid passage of the rotary blade. And a step of temporarily fixing the divided intermediate plate to the outer plate, and a step of integrally forming the intermediate plate and the outer plate and integrally forming a rotary blade body having a fluid passage therein. It was done.

(Function) According to the present invention, the shape of the intermediate plate material is reduced, the yield of the material is improved and the production is facilitated, and the rotary blade body having the radial fluid passage therein can be easily formed. By using the passage, the cooling medium can flow out to the outer peripheral side of the blade portion through the fluid passage at the time of cutting, lubricating the blade portion, cooling the blade portion, and further cutting chips of the blade portion from the cutting portion. As a result, the blade can be prevented from deteriorating.

(Embodiment) Hereinafter, an embodiment of the rotary blade according to the present invention will be described with reference to FIGS.
This will be described in detail with reference to the drawings.

As shown in FIG. 1, the rotary blade 10 is provided with a mounting hole 11 for mounting a drive shaft at the center of the rotary blade main body 10a, a chip escape groove 12 is provided on an outer peripheral portion, and each escape groove 12 is provided. A blade portion 14 formed by sintering diamond, a cemented carbide, a cemented carbide, or the like is brazed to the outer peripheral surface 13 in between.

The rotary blade body 10a has a through hole 15 as a fluid passage extending from the mounting hole 11 to the outer peripheral surface 13 at a position closer to the front side in the rotation direction between the respective escape grooves 12, and a mounting hole 11 of the through hole 15.
The end on the outer peripheral surface 13 side is positioned rearward in the rotational direction from the end on the side, and penetrates, and a groove 16 communicating with each through hole 15 is engraved on the inner peripheral surface of the mounting hole 11, and the blade portion 14 is formed. A hole 17 having the same cross-sectional area as the through hole 15 is formed at a position corresponding to the opening of the through hole 15 on the rotary blade body outer peripheral surface 13 side, and the blade portion 14 is formed from the inner peripheral surface side of the mounting hole 11.
A fluid passage for supplying a fluid to the outer peripheral surface side of the fluid passage.

As a mode of fixing the rotary blade main body 10a of the rotary blade 10 and the blade portion 14, as shown in FIG. 2, a flanged cylindrical body 18 is used to attach both the rotary blade main body 10a and the blade portion 14. Flanged cylindrical body 18
Holes 10b, 14a corresponding to the outer shape of each are perforated so that the flanged cylindrical body 18 can be fitted, and the holes 10b, 14a and the flanged cylindrical body 18 are fitted to each other, and each boundary portion is formed. The rotary blade main body 10a and the blade portion 14 are fixed in position and joined by brazing. In this case, the flanged cylindrical body 18 has a portion protruding in a cylindrical shape not protruding on both sides of the flange 18a, but protruding on only one side, and fitting the protruding side after joining the opposite side thereof, thereby rotating the blade. The position of the main body 10a and the blade portion 14 may be fixed.

As shown in FIGS. 3 to 5, the rotary blade main body 10a
The mounting hole 11a is formed in a disc-shaped thin plate having a thickness of 1/3 of the predetermined thickness.
Pressing the relief groove 12a to form the outer plate 19, and also a disk-shaped thin plate having a thickness of 1/3 of the predetermined thickness and having the same outer diameter as the outer plate 19, the release groove While punching 12b, a fluid passage 15a is formed radially from the position of the mounting hole forming edge 11b at the center to the outer peripheral end, and the position of the fluid passage 15a is closer to the mounting hole forming edge 11b side than the end. The outer shape is also defined by an arc 13a forming the outer periphery, a mounting hole forming edge 11b, and a fluid passage 15a by punching into a shape that curves rearward with respect to the rotation direction of the rotary blade 10 toward the outer peripheral side. Plate 20 composed of an aggregate of small pieces 20a
The outer plate 19 is attached to the outer plate 19 and the middle plate 20.
A jig (not shown) having an inner diameter portion for adjusting the outer diameter of the middle plate material formed to match the outer diameter of 19 and a projection for positioning the relief groove 12b, and the inner diameter of the middle plate material formed to match the inner diameter of the mounting hole 11a Using the aligning shaft member 11c, the outer plate 19 is fitted into the jig, and the small groove 20b is formed on one surface of the fitted outer plate 19 into an arc 13a that forms the outer shape of each small piece 20a while the small groove 20b is fitted to the jig. To form the middle plate material 20 into a disk shape,
Another outer plate 19 is fitted into the jig so as to cover the middle plate 20, and each outer plate 19 and the middle plate 20 are spot-welded and temporarily fixed, and then temporarily fixed from the jig after the temporary fixing. 1
Remove 9, 20 and remove the shaft member 11c for inner plate material inner diameter alignment,
Press the temporarily fixed plates 19, 20 to smooth each plate 19, 20 and bring the contact surfaces into close contact, then braze the contact surface between each outer plate 19 and the middle plate 20 and fix them together Then, after pressing and smoothing again, quenching, heat treatment such as annealing is performed to remove residual stress, and the disk-shaped rotary blade main body 10a having the through hole 15 is formed.

The mounting hole 11 of the outer plate 19 is provided in the mounting hole 11 of the rotary blade body 10a.
And machining at least one inner peripheral surface of the mounting hole 11b of the intermediate plate member 20 to form a groove 16 in which the inner peripheral surface 16b of the intermediate plate member 20 is more outwardly concave than the inner peripheral surface 16a of the outer plate member 19 side. Let it.

As shown in FIG. 6, the drive shaft 21 is formed as a hollow shaft on the drive shaft 21 on which the rotary blade 10 is fitted, and the hollow portion is used as a fluid passage 22, and the rotary blade 10 is fitted on the drive shaft 21. When it is attached, the rotary blade side opening end 23 of the fluid passage 22 is drilled in the drive shaft 21 in accordance with the position of the groove 16 provided in the mounting hole 11 of the fitted rotary blade 10. At the center of the drive shaft 21, a manifold-side opening end 24 of the fluid passage 22 is bored on the peripheral surface, and the manifold is formed on the outer peripheral side thereof.
In addition to the outer fitting 25, the space between the manifold 25 and the drive shaft 21 is rotatable so that fluid can be supplied from the stationary manifold 25 to the rotating drive shaft 21. A fluid supply 27 is connected to the manifold 25 via a conduit 26 so that a predetermined amount of a cooling medium such as water, cutting oil, or compressed air can be supplied.

Drive shaft 21 capable of supplying such a cooling medium
When the rotary blade 10 is attached and used, the cooling medium 28 supplied from the supply source 27 enters the manifold 25 through the conduit 26,
The drive shaft 21 rotating from the manifold 25 enters the fluid passage 22 from the manifold-side open end 24, and from the rotary blade-side open end 23 of the fluid passage 22 through the groove 16 provided in the mounting hole 11 of the rotary blade 10. 15 side, the blade portion 14 from the through hole 15 through the hole 17
And squirts out to the cutting portion 30 of the cutting object 29.
When the cutting portion 30 is cut into a groove shape, chips tend to accumulate in the cutting portion 30.
14 is deprived of heat by the cooling medium 28 and cooled, and the rotary blade
10 to prevent deterioration.

As shown in FIG. 7, as another mode of the middle plate material, it has a thickness of 1/3 of a predetermined thickness, the outer diameter is the same as that of the outer plate material 19, and a relief groove 31 is formed in the outer peripheral portion to form a center. In the disk-shaped thin plate material in which the mounting hole 32 is perforated, a fluid passage whose position changes from the mounting hole 32 to the outer peripheral end toward the outer peripheral side in the central portion from the mounting hole 32 to the outer peripheral side with respect to the rotation direction of the rotary blade 10. 33 forming its fluid passage
The fluid passages 34, 35, 36 branched from the middle of 33 to the rear in the rotation direction of the
By forming the fluid passage 37 branching backward with respect to the rotation direction of 10, a medium plate material 38 having a plurality of branch passages may be used.

In the case of the middle plate member 38, it is manufactured by the same method as that of the middle plate member 20.

When the intermediate plate member 38 is used, when the diameter of the rotary blade main body 10a is large, the number of the fluid passages 33 concentrated at the central portion of the rotary blade main body 10a can be reduced, and the interval between the respective fluid passages is increased. As well as reducing the flow resistance of each of the fluid passages 33, 34, 35, 36, and 37, supplying the cooling medium without increasing the supply pressure, improving the lubrication efficiency during cutting and improving the cooling medium The required pressure on the supply device side can be reduced.

As still another embodiment, when the diameter of the rotary blade body 10a is small, the fluid passage may be formed linearly from the mounting hole side to the outer periphery, and the rotary blade body may be formed in the same manner as the intermediate plate member 20. 10a can be manufactured.

(Effects of the Invention) As described above, in the present invention, the middle plate is formed into small pieces bounded by the fluid passage and assembled to the outer plate, and after the temporary fixing, the middle plate is integrally fixed to form the radial fluid passage. By forming the rotary blade main body installed inside, the material yield of the middle plate material is improved, the manufacture of the rotary blade main body with the radial fluid passage inside is facilitated, and the rotary blade with the fluid passage is easily provided. It can be manufactured, and at the time of cutting, the cooling medium can flow out to the outer peripheral side of the blade portion through the fluid passage, lubricating the blade portion, cooling the blade portion, and discharging it from the cutting portion of the blade portion. And deterioration of the blade portion can be prevented.

[Brief description of the drawings]

1 to 7 are drawings showing an embodiment of the present invention,
1 is a perspective view showing the rotary blade, FIG. 2 is an enlarged cross-sectional view showing a case where the positioning of the rotary blade main body and the blade portion of the rotary blade is performed using a flanged tubular body, 3 is a side view showing the outer plate material alone, FIG. 4 is a side view showing the middle plate material alone before punching out the mounting holes, FIG. 5 is a cross-sectional view of the rotary blade main body, and FIG. FIG. 7 is a cross-sectional explanatory view showing a state in which cutting is performed while taking out a cooling medium, FIG. 7 is a side view showing another embodiment of the intermediate plate material, and FIG. 8 is a perspective view showing a conventional rotary blade. 10 Rotating blade 10a Rotating blade body 11 Mounting hole 11a Mounting hole for outer plate material 11b Mounting hole for middle plate material 12 Relief groove 13 Outer peripheral surface 14 Blade part 15 Through hole (fluid passage) 15a… Fluid passage 16… Groove 17… Hole 18… Flanged cylindrical body 19 …… Outer plate material 20 …… Medium plate material 21 …… Drive shaft

Claims (1)

(57) [Claims] 1. A step of dividing and forming an intermediate plate using a fluid passage of a rotary blade, a step of temporarily fixing the divided and formed intermediate plate to an outer plate, and integrally forming the intermediate plate and the outer plate. A method for manufacturing a rotary blade, comprising a step of forming a rotary blade main body fixedly provided with a fluid passage therein.