JP3201190U - Rotating cutting blade - Google Patents

Abstract

Provided is a rotary cutting blade that has less material loss and less noise than the conventional one even if the cutting operation is performed while rotating the rotary cutting blade at a high speed as in the conventional case. A rotary cutting blade provided with a disk-shaped base metal and a plurality of blade bodies projecting radially outward on the outer periphery of the base metal, each of which includes a base metal element 19 and two steel plates. A multi-layer structure in which the blade element 21 is formed and joined through an elastic adhesive. Preferably, the overlapped metal plates are further caulked and joined. Due to the presence of the adhesive layer, in the rotary cutting blade, vibration generated in one component 17 or the chip is absorbed by the intermediate adhesive layer. Therefore, the fluctuation of the cutting width direction of the chip is reduced, the material loss is reduced, and the noise is also reduced. [Selection] Figure 3

Description

  The present invention relates to a rotary cutting blade used for cutting metal materials, wood, and the like.

  As shown in Patent Document 1, a conventional rotary cutting blade is formed with a base metal and a plurality of blades projecting radially outward on the outer periphery thereof from a single metal plate.

JP 2013-136138 A

The rotary cutting blade has a grindstone shape and is cut by scraping off a part of the material to be cut, such as metal materials and wood. Conventionally, material loss due to material scraping should be reduced as much as possible. Is required. On the other hand, material loss can theoretically be reduced by simply reducing the thickness of the base metal, but the rigidity of the base metal decreases, so the materials that can be cut are limited, and the rotary cutting blade is rotated at high speed. Work efficiency is reduced.
In addition, the noise generated during cutting work is a sound that contains a lot of high frequency components that are annoying to humans, and it is necessary to reduce the noise in consideration of the work environment of the worker and the local residents. It has been. On the other hand, if the rotational speed of the rotary cutting blade is simply slowed down, the same problem as described above will occur.

  Therefore, in order to solve the above-mentioned problems, the present invention provides a rotary cutting blade with less material loss and less noise than the conventional one, even if the cutting operation is performed while rotating the rotary cutting blade at a high speed as in the conventional case The purpose is to provide

  In order to solve the above problems, the invention of claim 1 is a disk-shaped base metal and a rotary cutting blade having a blade body on the outer periphery of the base metal, and the base metal is superposed on two sheets. The rotary cutting blade is characterized in that it has a multi-layer structure in which the metal plates are joined together with an adhesive.

  The invention of claim 2 is the rotary cutting blade according to claim 1, wherein the base metal and the blade body have a multilayer structure in which two superposed metal plates are joined together with an adhesive. It is the rotary cutting blade characterized.

  The invention of claim 3 is the rotary cutting blade according to claim 1 or 2, wherein the overlapped metal plates are further caulked and joined.

  The invention of claim 4 is the rotary cutting blade according to any one of claims 1 to 3, wherein the rotary cutting blade includes a plurality of blade bodies projecting radially outward on the outer periphery of the base metal. It is a blade.

  The invention of claim 5 is the rotary cutting blade according to claim 4, wherein a tip is joined in front of the blade in the rotational direction.

  When the rotary cutting blade of the present invention is used, even if the cutting operation is performed while rotating the rotary cutting blade at a high speed as in the conventional case, there is less material loss than in the conventional case, and noise is reduced.

It is a top view of the rotary cutting blade which concerns on the 1st Embodiment of this invention. It is a right side view of the rotary cutting blade of FIG. It is a disassembled perspective view of the rotary cutting blade of FIG. It is a top view of the rotary cutting blade which concerns on the 2nd Embodiment of this invention. It is a side view of the rotary cutting blade of FIG. It is a disassembled perspective view of the rotary cutting blade which concerns on the 3rd Embodiment of this invention. It is a disassembled perspective view of the rotary cutting blade which concerns on the 4th Embodiment of this invention.

A rotary cutting blade 1 according to a first embodiment of the present invention will be described with reference to FIGS.
The rotary cutting blade 1 is a tip saw as shown in the plan view of FIG.
Reference numeral 3 denotes a base (= main body). The base 3 has a disc shape, and a rotation shaft (not shown) for transmitting engine power is fitted into and connected to the center of the base 3. A connecting hole 5 is formed. A plurality of blades 7 having the same shape protruding radially outward are integrally formed on the outer periphery of the base metal 3 with the same pitch. A tip seat 9 for tip attachment is formed on the front side in the rotational direction of each blade body 7.
Since the rotary cutting blade 1 is for cutting a metal material, a bump 11 is formed on the rear side in the rotational direction.

Between adjacent blade bodies 7, a blade chamber 13 (= chip pocket) having the same shape is formed.
Reference numeral 15 denotes a chip, and the chip 15 is made of a hard material such as a cemented carbide. The tip 15 is a grindstone-like cutting blade. The chip 15 is joined to the above-described chip seat 9 by an ordinary method such as brazing.

The rotary cutting blade 1 has a structure in which two steel plates having the same shape are overlapped. Each steel plate is cut by punching or laser cutting, and the constituent elements 17 are formed in a shape in which the thickness of the rotary cutting blade 1 is reduced. The base metal elements correspond to the base metal 3 and the blade body 7 respectively. 19 and a blade element 21 are formed. Accordingly, a connecting hole 6 having the same diameter corresponding to the connecting hole 5 is formed in the base metal element 19. The blade element 21 has a small tip seat 10 and a small bump 12 corresponding to the tip seat 9 and the bump 11.
The two components 17 having the same shape are overlapped so that the outer peripheral surfaces of the respective blade elements 21 are flush with each other, and an adhesive layer 23 is provided between them in order to eliminate an air layer. ing. That is, the two base metal elements 19 and the blade element 21 are bonded to each other via the adhesive layer 23 described above.

The adhesive layer 23 is formed of an adhesive that becomes an elastic resin body after solidification. As an example, an adhesive in which the main agent is an epoxy resin and the curing agent is a polyamidoamine can be mentioned.
The chip 15 is attached so as to sandwich one blade element 21, the intermediate adhesive layer 23, and the other blade element 21 in the thickness direction. Therefore, the components 17 are more firmly joined to each other by attaching the chip 15.

In the rotary cutting blade 1, vibration generated on the one component 17 side or the chip 15 is absorbed by the intermediate adhesive layer 23.
Therefore, even if vibration occurs during the cutting operation, the shake of the tip 15 at the tip on the outer peripheral side of the rotary cutting blade 1 can be minimized. Since this type of rotary cutting blade 1 has a tip 15 in a grindstone shape and is cut by scraping off a part of the material to be cut, the tip 15 is made of a material to be scraped if there is little fluctuation in the cutting width direction. The width dimension is reduced and inevitably less material scraping is required. Moreover, since the chip 15 is not shaken, the cutting operation can be performed lightly, the life of the chip 15 can be extended, and a clean cut surface can be obtained.

  Further, noise is air propagation sound in which vibration radiated into the air propagates in the air. As described above, the rotary cutting blade 1 is bonded before the vibration generated during the cutting operation is propagated in the air. Since it is absorbed by the agent layer 23 and the propagation of vibration into the air is suppressed, noise is reduced. In addition, since high frequency components that are annoying to the human ear are preferentially absorbed, the minimum noise that is generated is also a sound that is easy to adjust to human hearing.

The thickness dimension of the entire rotary cutting blade 1 can be set to be the same as that of a type formed from a single conventional metal plate.
For example, when the diameter of the base metal 3 is 180 mm, the thickness dimension of the base metal element 19 is 0.75 mm, the thickness dimension of the adhesive layer 23 is 0.1 to 0.2 mm, and the diameter of the base metal 3 is In the case of 405 mm, the thickness dimension of the base metal element 19 can be set to 1.75 mm, and the thickness dimension of the adhesive layer 23 can be set to 0.1 to 0.2 mm.

A manufacturing method of an example of the above-described rotary cutting blade 1 will be described.
First, a steel plate made of a material is punched and subjected to a cutting process such as laser cutting to form a component 17 composed of a base element 19 and a blade element 21 and, if necessary, a quenching process is performed to increase the strength.
Next, both surfaces of the component 17 are lightly polished. The reason for polishing not only the surface to which the adhesive is bonded but also both surfaces is to eliminate warpage.

Next, an adhesive as described above is applied to one surface of one component 17, and the other component 17 is substantially flush with each other, that is, two blade elements 21. The small chip seat 10 and the small bump 12 are superposed from above so that the outer peripheral surfaces thereof are substantially flush with each other.
Then, a large plate is placed so as to cover the entire upper component 17, and a weight is placed at the center so as to maintain the balance of the center of gravity, and is allowed to stand for about half a day to promote the solidification of the adhesive. Since the weight is placed, the pores at the boundary between the adhesive and the component 17 in contact with the adhesive and the adhesive quickly escape to the outside before the adhesive solidifies. Accordingly, the adhesion between the component 17 and the adhesive layer 23 is increased. Further, the thickness of the adhesive layer 23 is made uniform.

After the adhesive is completely solidified, the exposed outer surface of each component 17 is finish-polished. In addition, a reamer process is applied to the edge of the connecting hole 6 of the two base metal elements 19 that are overlapped, so that the unevenness at the boundary between the base metal elements 19 is eliminated, and the connecting hole 5 is integrated with high precision. . At that time, the adhesive protruding into the connecting hole 6 is removed.
Further, the outer peripheral surfaces of the two blade elements 21 that are overlapped, particularly the outer peripheral surfaces of the small tip seat 10 and the small bumps 12, are polished so that the unevenness at the boundary between the blade element 21 is eliminated and the surface is highly accurate. In addition, the distance from the center to the outer periphery of the base metal 3 is made uniform to form an integrated blade body 7, that is, the tip seat 9 and the bump 11. At that time, the adhesive protruding from the outer periphery is similarly removed.
Thereafter, the chip 15 is joined to the chip seat 9 by a conventional method.

  In the rotary cutting blade 1 manufactured as described above, since the two components 17 are firmly bonded, the cutting operation is performed under the same conditions as those of a type formed from a single conventional steel plate. Can do.

A rotary cutting blade 25 according to a second embodiment of the present invention will be described with reference to FIGS.
In this rotary cutting blade 25, the same reference numerals are given to the portions common to the rotary cutting blade 1 according to the first embodiment, and the description thereof will be omitted, and only different portions will be described.
Reference numeral 27 denotes a caulking hole, and four caulking holes 27 are formed in each base metal element 19. Each caulking hole 27 is formed point-symmetrically with respect to the center of the base element 19, that is, the base 3 in consideration of the center of gravity balance. The caulking hole 27 is formed in the same manner as the connection hole 6 of the base element 19.

An aluminum caulking material 29 formed in a disk shape is inserted into the two caulking holes 27 overlapped by the solidification of the adhesive, and both end portions of the caulking material 29 are formed on the outer peripheral edges of the caulking holes 27. It is caulked so that it wraps around, and finally polished.
The rotary cutting blade 25 is further caulked in addition to the adhesive bonding, and the components 17 are bonded more firmly.

A rotary cutting blade 31 according to a third embodiment of the present invention will be described with reference to FIG.
In this rotary cutting blade 31, the same parts as those of the rotary cutting blade 1 according to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described.
In the rotary cutting blade 1, the two components 17 have the same shape, and each has a base element 19 and a blade element 21. In the rotary cutting blade 31, a base metal 33 is formed with one steel plate. A blade body 35 is formed. A large circular recess 37 coaxial with the connection hole 5 is formed at the center of the base metal 33. The other steel plate is formed into a disc 39 having a size for embedding the circular recess.
An adhesive is applied to the inner surface of the circular recess 37 over the entire surface, and then the discs 39 are overlapped. Otherwise, the rotary cutting blade 31 can be manufactured in the same manner as in the first embodiment.

Since the adhesive layer of the rotary cutting blade 31 is not provided in the blade body 35 and the vicinity thereof, the material scraping amount and noise reduction effect are inferior to the rotary cutting blade 1, but the blade body 35 is a single material. Therefore, the dimensional accuracy of the blade body 35 is easy to obtain and the manufacture is easy.
Therefore, depending on the type of material to be cut, it may be advantageous from the viewpoint of manufacturing cost to use such a rotary cutting blade 31.

A rotary cutting blade 41 according to a fourth embodiment of the present invention will be described with reference to FIG.
In this rotary cutting blade 41, the parts common to the rotary cutting blade 31 according to the third embodiment are denoted by the same reference numerals, and description thereof is omitted, and only different parts are described.
In the rotary cutting blade 41, a base metal 33 and a blade body 35 are formed of one steel plate. A large donut-shaped concave portion 43 coaxial with the center of the base metal 33 is formed. An inner flange 45 is provided around the connection hole 5, and an outer flange 47 is provided on the outer peripheral side. The other steel plate is formed into a doughnut-shaped disk 49 having a size for embedding the donut-shaped recess 43, that is, an outer diameter corresponding to the outer flange 47 and an inner diameter corresponding to the inner flange 45.
An adhesive is applied over the entire inner surface of the donut-shaped recess 43, and then the donut-shaped disk 49 is overlaid. Otherwise, the rotary cutting blade 41 can be manufactured in the same manner as in the third embodiment.

  Since the donut-shaped disk 49 is fixed by being sandwiched between the inner flange 45 and the outer flange 47 of the base metal 33, the dimensional accuracy of the connecting hole 5 is easily obtained. In addition, the inner flange 45 in the vicinity of the connecting hole 5 is in contact with and fixed to the flange of the cutting machine to which the rotary cutting blade 41 is attached. There is no particular inconvenience even without an adhesive layer.

Although the embodiments of the present invention have been described in detail, the specific configuration is not limited to the above-described embodiments, and there are design changes, material changes, and the like without departing from the scope of the present invention. Even included in the idea.
For example, in the above-described embodiment, the tip is attached to any rotary cutting blade, but even a simple circular saw without a separate cutting blade such as a tip or abrasive grains such as diamond on the cutting edge surface An applied cutter or the like may be used.

Moreover, in the said 3rd, 4th embodiment, although the circular board is joined to the surface of the side which rotates counterclockwise among both surfaces of the base metal which appears by planar view, circular shape is formed on the other surface. The plates may be joined.
In any case, the scope of the present invention is not limited except for shapes and the like for which a utility model registration is requested, and shapes and materials that have been conventionally or are devised in the future can be arbitrarily combined.
Of course, the present invention is not limited to metal materials and wood cutting devices, but can be applied to rotary cutting blades for mowing mounted on mowing machines.

  The rotary cutting blade according to the present invention is economical and environmentally friendly because it has a relatively simple configuration and not only has good cutting performance, but also has a long blade life including a tip and reduced noise.

1 Rotating cutting blade (first embodiment)
3 ... Base metal 5 ... Connection hole 7 ... Blade body 9 ... Tip seat 11 ... Cove 13 ... Blade chamber 15 ... Chip 17 ... Component 19 ... Base element 21 ... Blade element 23... Adhesive layer 25... Rotary cutting blade (second embodiment)
27... Caulking hole 29... Caulking material 31... Rotary cutting blade (third embodiment)
33 ... Base metal 35 ... Blade 37 ... Circular recess 39 ... Disk 41 ... Rotary cutting blade (fourth embodiment)
43 ... Donut-shaped recess 45 ... Inner flange 47 ... Outer flange 49 ... Donut-shaped disk

Claims (5)

A disk-shaped base metal, and a rotary cutting blade provided with a blade on the outer periphery of the base metal,
2. The rotary cutting blade according to claim 1, wherein the base metal has a multilayer structure in which two superposed metal plates are joined via an adhesive.   The rotary cutting blade according to claim 1, wherein the base metal and the blade body have a multi-layer structure in which two superposed metal plates are bonded via an adhesive.   The rotary cutting blade according to claim 1 or 2, wherein the metal plates stacked are further caulked and joined.   The rotary cutting blade according to any one of claims 1 to 3, further comprising a plurality of blade bodies projecting radially outward on an outer periphery of the base metal.   It is a rotary cutting blade described in Claim 4, Comprising: The chip | tip is joined ahead of the rotation direction of the blade body, The rotary cutting blade characterized by the above-mentioned.

Images