JP6882828B2 - Metal saw - Google Patents

Description

The present invention relates to a metal saw used when cutting ceramics or the like before sintering.

One of the semiconductor devices used in mobile phones and the like is a multilayer ceramic capacitor. Hundreds of these monolithic ceramic capacitors are mounted on one mobile phone, and are mass-produced and consumed in large quantities every day.

A multilayer ceramic capacitor is manufactured by first laminating a plurality of plates of raw ceramics (ceramics before sintering), dividing the plate-like material into individual chip capacitors by a cutting device, and then sintering the capacitors. If the division by the cutting device is performed after sintering, thermal deformation occurs due to the high temperature during sintering, the arrangement of the chip capacitors is distorted, and precise cutting becomes difficult. Therefore, the division is performed before sintering the ceramics.

The step of dividing a plurality of plate-shaped laminates of raw ceramics into individual chip capacitors by a cutting device is performed by a cutting device equipped with a metal saw. Patent Document 1 discloses a metal saw (rotary blade) used for cutting raw ceramics and having a saw blade formed on the outer periphery.

Japanese Unexamined Patent Publication No. 4-179505

By the way, when the raw ceramics are repeatedly cut using the metal saw, the saw blade on the outer circumference of the metal saw is worn. In particular, the corners of both ends (the angle between the side surface of the metal saw and the cutting surface) in the thickness direction of the cutting surface of the saw blade (the surface between one side surface of the metal saw and the other side surface) have a large cutting load. The saw blade gradually changes to a shape with rounded corners due to heavy wear.

When the corner portion of the saw blade of the metal saw is worn and the corner portion is rounded, the shape is reflected in the machined portion at the cutting portion of the cut raw ceramics. Therefore, there arises a problem that the side surfaces of the individual chip capacitors manufactured by being divided also have a shape that reflects the shape.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a metal saw in which wear of corners of a saw blade is suppressed. Then, it is an object of the present invention to provide a metal saw in which the side surface of the formed chip capacitor does not have an abnormal shape even if it is used when dividing the raw ceramics.

According to one aspect of the present invention, a metal saw having a saw blade formed on an outer peripheral portion thereof, the first plate-shaped object, the third plate-shaped object, the first plate-shaped object, and the third plate-shaped object. and a second plate-like material between the plate-like workpiece, the integral, the saw blade includes a first plate-like workpiece and a second plate-like workpiece, and a third plate-like material, Provided is a metal saw characterized by having a plurality of cutting edge portions made of, and a plurality of back portions made of a second plate-like object on the rear side of each of the plurality of cutting edge portions in the rotation direction of the metal saw. ..

Further, according to another aspect of the present invention, the metal saw having a saw blade formed on the outer peripheral portion thereof, the first plate-shaped object, the third plate-shaped object, and the first plate-shaped object. A second plate-like object between the and a third plate-like object is integrally provided, and the saw blade includes a first plate-like object, a second plate-like object, and a third plate. It has a plurality of cutting edge portions composed of a shaped object, and a plurality of back portions composed of a second plate-shaped object on the rear side of each of the plurality of cutting edge portions in the rotation direction of the metal saw. The plate-shaped object and the third plate-shaped object are provided with a metal saw characterized by having higher rigidity than the second plate-shaped object.

Further, according to another aspect of the present invention, the metal saw has a saw blade formed on the outer peripheral portion, and the metal saw includes a first plate-shaped object, a third plate-shaped object, and the first plate-shaped object. of the platelet and a second plate-like material between the third plate-like workpiece, the integrally includes, the saw blade includes a first plate-like workpiece and a second plate-like workpiece, It has a third plate-shaped object, a plurality of cutting edge portions, and a plurality of back portions composed of a second plate-shaped object on the rear side of each of the plurality of cutting edge portions in the rotation direction of the metal saw. The first plate-like object and the third plate-like object have higher rigidity than the second plate-like object, and the second plate-like object has the first plate-like object and the first plate-like object. A third plate-like material and a metal saw characterized by having a higher toughness than the third plate-like material are provided.

In the metal saw according to one aspect of the present invention, the first plate-shaped material and the third plate-shaped material may have an abrasive material. Further, in the metal saw according to one aspect of the present invention, the constituent elements of the first plate-shaped material and their ratios may be different from the constituent elements of the second plate-shaped material and their ratios.

According to one aspect of the present invention, there is provided a metal saw in which the first to third plate-shaped objects can be rotated as a unit. Since the metal saw according to one aspect of the present invention is formed by integrally forming three or more plate-shaped objects, the properties of each can be set independently. For example, a plate-shaped material having high rigidity and a plate-shaped material having high toughness can be formed by laminating and joining a plurality of plates in the thickness direction.

For example, by arranging highly rigid plate-like objects on both side surfaces, the wear resistance of the corners of the saw blade of the metal saw can be improved. Moreover, if a plate-like object having high toughness is arranged between the plate-like objects having high rigidity, the metal saw becomes strong against external force and impact, and the durability of the metal saw is enhanced.

Furthermore, when ceramics are cut with a metal saw in which a plate-shaped object with high rigidity is placed on both sides that are easily exposed to friction and a plate-shaped object with low rigidity is placed inside that is not easily exposed to friction, the cutting surface of the metal saw becomes uniform. It will be exhausted. That is, only the corners of the saw blade of the metal saw are not worn to form a rounded shape. Therefore, the side surface of the formed chip capacitor does not have an abnormal shape.

Further, in the metal saw according to one aspect of the present invention, the saw blade has a cutting edge portion and a back portion. The cutting edge portion for cutting ceramics is composed of first to third plate-shaped objects, and a sufficient thickness of the portion used for cutting can be secured. On the other hand, since there is no first plate-like object and third plate-like object on the side surface side of the saw blade in the back portion which is not a part used for cutting, cutting chips generated during cutting can be efficiently eliminated. Space is secured.

Therefore, it is possible to reduce the wear at the time of cutting the corner portion of the tip of the cutting edge portion of the saw blade. Further, since the shape having such a cutting edge portion and the back portion can be easily formed by simply adjusting the shape of each plate-like object without performing complicated processing on the metal saw, the cost related to the manufacture of the metal saw is increased. It can be suppressed.

Therefore, according to one aspect of the present invention, there is provided a metal saw in which wear of the corners of the saw blade is suppressed. Then, a metal saw is provided in which the side surface of the chip capacitor formed even when used when dividing the raw ceramics does not have an abnormal shape.

It is a perspective view which shows an example of a cutting apparatus. It is a perspective view schematically explaining the structure of a cutting unit. FIG. 3A is a schematic view of the metal saw viewed from the side, and FIGS. 3B and 3C are views schematically explaining the cross-sectional structure of the metal saw. FIG. 4 (A) is a schematic view of a metal saw according to another embodiment as viewed from the side, and FIGS. 4 (B) and 4 (C) are views schematically explaining a cross-sectional structure of the metal saw. Is.

An embodiment according to the present invention will be described. As an example of a cutting device using a metal saw according to the present embodiment, an external perspective view of a cutting device 2 for cutting a workpiece such as ceramics is shown in FIG. The cutting device 2 includes a main body 4 in which a cutting unit 10 having the metal saw is housed in the outer cover 8, a display monitor 6 mounted on the outer cover 8 of the main body 4, and the like.

A touch panel type display monitor 6 is arranged on the front surface of the exterior cover 8. With this display monitor 6, the operator inputs a command to the device, and the operating status of the device is displayed on the display monitor 6.

The cutting unit 10 is configured to be movable in the Y-axis direction. A holding table 12 is arranged adjacent to the cutting unit 10 so as to be movable in the X-axis direction. The holding table 12 holds the workpiece during machining. The mounting table 14 is a mounting table (elevator) for mounting a cassette capable of accommodating a plurality of workpieces inside, and is configured to be movable in the vertical direction.

When the cassette for accommodating the workpiece is placed on the mounting table 14, the cutting device 2 carries out the workpiece from the cassette and places it on the holding table 12 by a predetermined transfer mechanism. Then, the holding table 12 applies a negative pressure from a suction source (not shown) to suck and hold the workpiece on the holding table 12.

Here, a more detailed structure of the cutting unit 10 will be described with reference to FIG. FIG. 2 is an exploded view schematically explaining the structure of the cutting unit 10. As shown in FIG. 2, the cutting unit 10 includes, for example, a spindle housing 16 fixed to a moving mechanism (not shown) of the cutting device 2. Inside the spindle housing 16, a spindle 18 extending in the front-rear direction (Y-axis direction) is rotatably supported. The tip (front end) of the spindle 18 projects forward from the spindle housing 16.

An opening 18a is formed at the tip of the spindle 18, and a thread groove is provided on the inner wall surface 18b of the opening 18a. A rear flange 20 made of a material containing a ferromagnet is attached to the tip of the spindle 18. The rear flange 20 includes a flange portion 22 extending outward in the radial direction and a boss portion 24 protruding forward from the surface (front surface) of the flange portion 22.

An opening 22a is formed in the center of the flange portion 22 so as to penetrate the flange portion 22 in the front-rear direction. Further, on the back surface (rear surface) side of the flange portion 22, a fitting portion (not shown) into which the tip end portion of the spindle 18 can be fitted is formed. This fitting portion is provided at a position corresponding to the opening 22a.

If the fixing bolt 26 is tightened in the opening 22a and the opening 18a with the tip of the spindle 18 fitted in the fitting portion formed in the flange portion 22, the rear flange 20 is fixed to the spindle 18. The outer peripheral surface 26a of the fixing bolt 26 is provided with a thread corresponding to the thread groove of the opening 18a.

The outer peripheral surface of the flange portion 22 is a contact surface 22b that abuts on the back side surface of the metal saw 28. The contact surface 22b is formed in an annular shape when viewed from the axial direction (Y-axis direction) of the spindle 18. The boss portion 24 is formed in a cylindrical shape, and a thread is provided on the outer peripheral surface 24a thereof.

A circular opening 28a through which the boss portion 24 is inserted is formed in the center of the metal saw 28, and the metal saw 28 is attached to the rear flange 20 by inserting the boss portion 24 through the opening 28a.

With the metal saw 28 attached to the rear flange 20, an annular front flange 30 is attached to the front side surface of the metal saw 28. An opening 30a is formed in the center of the front flange 30, and the boss portion 24 of the rear flange 20 is fitted into the opening 30a. The back surface of the front flange 30 on the outer peripheral side is a contact surface (not shown) that comes into contact with the front side surface of the metal saw 28. This contact surface is provided at a position corresponding to the contact surface 22b of the rear flange 20.

After mounting the front flange 30, the annular fixing nut 32 is tightened to the tip of the boss portion 24. As a result, the front flange 30 is pressed against the rear flange 20, and the metal saw 28 is sandwiched between the rear flange 20 and the front flange 30. An opening 32a is formed in the fixing nut 32, and a screw groove is provided on the inner wall surface 32b of the opening 32a.

A blade cover 34 for accommodating a metal saw 28 or the like mounted on the spindle 18 is provided on the front surface of the spindle housing 16. The blade cover 34 is composed of a blade cover main body 36 fixed to the front surface of the spindle housing 16 and a slide cover 38 slidable in the left-right direction (X-axis direction) with respect to the blade cover main body 36.

The slide cover 38 is connected to the blade cover main body 36 via an air cylinder 40, and slides with the air supplied through the connector 42. After mounting the metal saw 28 on the spindle 18, the slide cover 38 is slid to close the blade cover 34, so that the metal saw 28 can be housed inside the blade cover 34.

A pair of substantially L-shaped nozzles 44 that sandwich the lower portion of the metal saw 28 back and forth are fixed to the slide cover 38. Cutting water is supplied to the nozzle 44 through a connector 46 provided on the slide cover 38. A plurality of slits (not shown) are formed on the tip end side of the nozzle 44 so as to face the metal saw 28. Cutting water is supplied through the plurality of slits.

On the other hand, the blade cover main body 36 is provided with a supply hole (not shown) for supplying cutting water to the metal saw 28. The supply hole is connected to a connecting tool 48 provided in the blade cover main body 36, and the metal saw 28 is cooled and washed by the cutting water supplied from the supply hole through the connecting tool 48.

Next, the structure of the metal saw 28 will be described with reference to FIGS. 3 (A) to 3 (C). FIG. 3A is a schematic view of the metal saw viewed from the side, and FIGS. 3B and 3C are views schematically explaining a cross-sectional structure of the metal saw in the thickness direction. ..

As shown in FIG. 3A, a circular opening 28a inserted through the boss portion 24 is formed in the center of the metal saw 28. A saw blade 28b is formed on the outer circumference of the metal saw 28. When the spindle 18 of the cutting unit 10 rotates, the metal saw 28 mounted on the cutting unit 10 rotates along with the rotation. When the tip of the rotating metal saw 28 reaches the workpiece, the saw blade 28b cuts the workpiece.

The saw blade 28b has a plurality of cutting edge portions (rake face) 28c, and a plurality of back portions (escape surfaces) 28d of the plurality of cutting edge portions 28c on the rear side in the rotational direction of the metal saw 28, respectively. Each cutting edge portion 28c has a shape protruding in the outer peripheral direction of the metal saw 28 from the adjacent back portion 28d, and cuts the workpiece. Each back portion 28d has a shape cut in the central direction of the metal saw 28 with respect to the adjacent cutting edge portion 28c, and secures a space for efficiently discharging cutting chips generated by cutting.

FIG. 3B is a schematic view showing a cross-sectional structure when the metal saw 28 shown in FIG. 3A is cut at a plane perpendicular to the side surface and passing through the alternate long and short dash line AA'. FIG. 3B is a diagram including a saw blade 28b, particularly a cutting edge portion 28c. FIG. 3C is a schematic view showing a cross-sectional structure when the metal saw 28 shown in FIG. 3A is cut so as to pass through the alternate long and short dash line BB'vertically to the side surface. FIG. 3C is a diagram including the back portion 28d of the saw blade 28b.

As shown in FIGS. 3 (B) and 3 (C), the metal saw 28 includes a first plate-shaped object 50a, a third plate-shaped object 50c, and the first plate-shaped object 50a and the third plate-shaped object 50a. It has a second plate-shaped object 50b sandwiched between the plate-shaped objects 50c. As shown in FIG. 3B, the cutting edge portion 28c includes a first plate-shaped object 50a, a second plate-shaped object 50b, and a third plate-shaped object 50c. On the other hand, as shown in FIG. 3C, the back portion 28d is composed of a second plate-shaped object 50b.

A method of forming the metal saw 28 will be described. First, a metal powder is placed in a ring-shaped molding die and cold-pressed to form a ring-shaped compaction body. Next, three ring-shaped pressure powders formed are laminated, sintered, and integrated. When the outer peripheral portion of the obtained sintered body is ground to the cutting edge, a metal saw 28 is formed.

The saw blade 28b of the formed metal saw 28 has a cutting edge portion 28c made of a first to third plate-shaped object and a back portion 28d made of a second plate-shaped object, and the metal saw 28 has a complicated structure. It becomes. However, since the metal saw 28 according to the present embodiment can be manufactured by forming and sintering each plate-like object by changing its shape in this way, complicated processing is not required to manufacture the metal saw 28.

For example, if the shape of the metal saw 28 is to be formed from a single plate-like object, each back portion 28d must be carved out in order to form the shape of the back portion 28d, which is troublesome. On the other hand, it does not take such time and effort to form the metal saw 28 according to the present embodiment. Therefore, a metal saw 28 including a saw blade 28b having a cutting edge portion 28c and a back portion 28d having a thickness different from that of the cutting edge portion 28c can be manufactured at low cost.

The physical characteristics of each plate-shaped material can be adjusted by adjusting the constituent materials, composition, and the like of the metal powder as the raw material at the time of producing the first to third plate-shaped materials. By adjusting the physical characteristics of the first to third plate-shaped objects, the physical characteristics of the metal saw 28 formed by sintering can be adjusted.

For example, in the metal saw 28 according to the present embodiment, the physical properties of the first to third plate-shaped objects are adjusted to obtain the rigidity of the first plate-shaped object 50a and the rigidity of the third plate-shaped object 50c. Each can be made higher than the rigidity of the second plate-shaped object 50b.

In general, when cutting is repeated using a metal saw, the corners of both ends in the thickness direction are worn at the cutting edge of the saw blade, and the corners of the saw blade 28b on the outer circumference of the metal saw gradually change to a rounded shape. Tend to do.

Therefore, in the metal saw 28 according to the present embodiment, the rigidity of the first plate-shaped object 50a and the third plate-shaped object 50c is set to be higher than the rigidity of the inner second plate-shaped object 50b. -Adjust the constituent materials, composition, etc. of the third plate-shaped material. Then, since both side surfaces of the metal saw 28 become a plate-like object having high rigidity, the wear resistance of the metal saw 28 is improved. Therefore, the shape of the metal saw 28 is unlikely to change due to wear, and the shape of the side surface of the chip capacitor formed by cutting with the metal saw 28 is also unlikely to be in an abnormal state.

By the way, generally, when the rigidity of the metal saw is increased, the hardness is increased but the metal saw tends to be brittle, and the possibility of damage due to impact or the like increases. Therefore, simply increasing the hardness of the metal saw in order to realize a metal saw having excellent wear resistance causes a problem of impact resistance.

Therefore, in the metal saw 28 according to the present embodiment, the toughness of the second plate-shaped object 50b sandwiched between the first plate-shaped object 50a and the third plate-shaped object 50c is increased. Adjust the constituent materials and composition of the plate-like material. The plate-like material with high toughness has improved impact resistance and cushions the impact received from the outside.

When the toughness of the second plate-shaped object 50b is higher than that of the first and third plate-shaped objects, when an impact is applied to the metal saw 28 from the outside, the second plate-shaped object 50b is impacted. To alleviate. Then, it is possible to prevent the first plate-shaped object and the third plate-shaped object having high rigidity from being damaged by the impact. Since the second plate-shaped material 50b has high toughness and low wear resistance, it is likely to be worn when cutting with the metal saw 28 is repeated, but the second plate-shaped material 50b is not located at both ends where wear is particularly likely to occur. Can withstand long-term use.

That is, since the metal saw 28 according to the present embodiment is provided with the first plate-shaped object 50a and the third plate-shaped object 50c on the side surface side where wear is likely to occur, the shape change due to the wear of the side surface of the saw blade 28b can be suppressed. On the other hand, since the second plate-shaped object 50b having high toughness is provided inside, the occurrence of damage or the like can be suppressed even if an impact is applied to the metal saw 28. Therefore, the life of the metal saw 28 is extended.

The rigidity and toughness of the plate-shaped material are adjusted by the constituent elements of the plate-shaped material and their ratios (content ratios) and the like. Then, for example, the constituent elements of the first plate-shaped material and its content ratio are set to be different from the constituent elements of the second plate-shaped material and their ratios, and the rigidity and toughness of each are adjusted. For each plate-shaped material used in the metal saw 28, for example, a material in which cobalt is mixed with tungsten carbide (tungsten carbide) as a binder is used, and the rigidity and toughness of the plate-shaped material can be adjusted by the content of cobalt. ..

More specifically, when forming a plate-like material having high rigidity, the proportion of cobalt contained in tungsten carbide is about 5 wt%. When forming a plate-like material having high toughness, the proportion of cobalt contained in tungsten carbide is about 30 wt%. However, the metal saw according to the present embodiment is not limited to this. Rigidity and toughness are determined together with the thickness of each plate-like object according to the desired properties of the metal saw and the type of the object to be processed.

Further, in the metal saw according to the present embodiment, a high hardness abrasive material (particles) made of a material such as diamond or alumina is mixed into the first plate-shaped material and the third plate-shaped material. When the abrasive material (particles) is mixed in the first plate-shaped material and the third plate-shaped material, the wear resistance is improved as compared with the other materials constituting each plate-shaped material. When the abrasive material (particles) is mixed into the first plate-shaped object and the third plate-shaped object which are both side surfaces of the metal saw, the wear of the metal saw can be reduced and the life of the metal saw can be extended. However, the metal saw according to the present embodiment is not limited to the case where the abrasive material is included.

Further, in the saw blade 28b of the metal saw 28 according to the present embodiment, the cutting edge portion 28c is made of a first to third plate-like object, and a sufficient thickness of a portion to be cut can be secured. On the other hand, since the back portion 28d does not have the first plate-shaped object 50a and the third plate-shaped object 50c on the side surface side of the saw blade 28b, in order to efficiently remove cutting chips generated from the workpiece. Space can be secured.

The present invention is not limited to the description of the above embodiment, and can be implemented with various modifications. For example, in the above embodiment, the case where the number of plate-shaped objects constituting the metal saw is three has been mainly described. However, the plate-shaped material constituting the metal saw may be composed of four or more pieces, and in that case, the rigidity of the plate-shaped material on both side surfaces of the metal saw may be higher than the rigidity of the inner plate-shaped material.

Next, another form of the metal saw according to one aspect of the present invention will be described. The structure of the metal saw 28 according to another embodiment will be described with reference to FIGS. 4 (A) to 4 (C). FIG. 4 (A) is a schematic view of the metal saw viewed from the side, and FIGS. 4 (B) and 4 (C) are views schematically explaining a cross-sectional structure of the metal saw in the thickness direction. .. The metal saw 28 according to another embodiment described below has a cross-sectional structure of a back portion 28d mainly different from that of the metal saw 28 according to the above-described embodiment.

FIG. 4B is a schematic view showing a cross-sectional structure when the metal saw 28 shown in FIG. 4A is cut at a plane perpendicular to the side surface and passing through the alternate long and short dash line AA'. FIG. 4B is a diagram including a saw blade 28b, particularly a cutting edge portion 28c. FIG. 4C is a schematic view showing a cross-sectional structure when the metal saw 28 shown in FIG. 4A is cut so as to pass through the alternate long and short dash line BB'vertically to the side surface. FIG. 3C is a diagram including the back portion 28d of the saw blade 28b.

As shown in FIGS. 4 (B) and 4 (C), the metal saw 28 includes a first plate-shaped object 50a, a third plate-shaped object 50c, and the first plate-shaped object 50a and the third plate-shaped object 50a. It has a second plate-shaped object 50b sandwiched between the plate-shaped objects 50c. As shown in FIG. 4B, the cutting edge portion 28c includes a first plate-shaped object 50a, a second plate-shaped object 50b, and a third plate-shaped object 50c. On the other hand, as shown in FIG. 4C, the back portion 28d is composed of a first plate-shaped object 50a and a third plate-shaped object 50c.

A method of forming the metal saw 28 according to another embodiment will be described. First, a metal powder is placed in a ring-shaped molding die and cold-pressed to form a ring-shaped compaction body. Next, it is temporarily sintered at a low temperature (for example, 500 ° C.) and processed to have a predetermined thickness and shape to form each plate-like substance. The first plate-shaped object 50a and the third plate-shaped object 50c are formed in a shape constituting the cutting edge portion 28c and the back portion 28d, and the second plate-shaped object 50b is formed in a shape constituting the cutting edge portion 28c. To do.

Next, the formed plate-like objects are laminated and sintered (for example, 900 ° C.) to be integrated. Sintering is carried out in a state where the first to third plate-like objects are sandwiched between two carbon plates at a predetermined pressure. A convex portion is formed in advance on each of the two carbon plates in a region corresponding to the back portion 28d of the saw blade 28b.

Then, the first plate-shaped material 50a and the third plate-shaped material 50c softened by being exposed to the high temperature at the time of sintering are pushed by the convex portion of the carbon plate and head toward the inside of the metal saw 28 in the region corresponding to the back portion 28d, respectively. Transforms. Therefore, both of them come into contact with each other so as to wrap the second plate-shaped object 50b on the back portion 28d. In other words, the first plate-shaped object 50a and the third plate-shaped object 50c are deformed so as to fill the defective portion of the second plate-shaped object 50b on the back portion 28d. Then, when the outer peripheral portion of the obtained sintered body is ground by the cutting edge, the metal saw 28 is formed.

The saw blade 28b of the formed metal saw 28 has a cutting edge portion 28c made of first to third plate-shaped objects and a back portion 28d made of a first plate-shaped object and a third plate-shaped object. , The metal saw 28 has a complicated structure. However, according to the other embodiment, the metal saw 28 having such a complicated structure can be easily manufactured. Further, as compared with the metal saw 28 according to the above-described embodiment, the metal saw 28 according to the other embodiment has a back portion 28d made of a plate-like object having high rigidity, so that the back portion 28d has higher rigidity.

The back portion 28d may be composed of at least one of a first plate-shaped object and a third plate-shaped object. That is, it may be composed of only one of the first plate-shaped material or the third plate-shaped material, or may be composed of both the first plate-shaped material and the third plate-shaped material.

In addition, the structure, method, etc. according to the above-described embodiment can be appropriately modified and implemented as long as they do not deviate from the scope of the object of the present invention.

2 Cutting device 4 Main body 6 Display monitor 8 Exterior cover 10 Cutting unit 12 Holding table 14 Mounting stand 16 Spindle housing 18 Spindle 18a Opening 20 Rear flange 22 Flange part 22a Opening 22b Contact surface 24 Boss part 26 Fixing bolt 26a Outer surface 28 Metal saw 28a Opening 28b Saw blade 28c Cutting blade 28d Back 30 Front flange 30a Opening 32 Fixing nut 32a Opening 32b Inner wall surface 34 Blade cover 36 Blade cover body 38 Slide cover 40 Air cylinder 42 Connecting tool 44 Nozzle 46 Connecting tool 48 Connecting tool 50a 1 plate-shaped material 50b 2nd plate-shaped material 50c 3rd plate-shaped material 52a Opening of 1st plate-shaped material 52b Opening of 2nd plate-shaped material 52c Opening of 3rd plate-shaped material

Claims (5)

A metal saw with a saw blade formed on the outer circumference.
It integrally has a first plate-like object, a third plate-like object, and a second plate-like object between the first plate-like object and the third plate-like object.
The saw blade
A plurality of cutting edge portions including a first plate-shaped object, a second plate-shaped object, and a third plate-shaped object,
Each of the plurality of cutting edge portions has a plurality of back portions made of a second plate-like object on the rear side in the rotation direction of the metal saw, and
A metal saw characterized by having. A metal saw with a saw blade formed on the outer circumference.
It integrally has a first plate-like object, a third plate-like object, and a second plate-like object between the first plate-like object and the third plate-like object.
The saw blade
A plurality of cutting edge portions including a first plate-shaped object, a second plate-shaped object, and a third plate-shaped object,
Each of the plurality of cutting edge portions has a plurality of back portions made of a second plate-like object on the rear side in the rotation direction of the metal saw.
The first plate-shaped object and the third plate-shaped object are metal saws having higher rigidity than the second plate-shaped object. A metal saw with a saw blade formed on the outer circumference.
The metal saw integrally includes a first plate-shaped object, a third plate-shaped object, and a second plate-shaped object between the first plate-shaped object and the third plate-shaped object. And
The saw blade
A plurality of cutting edge portions including a first plate-shaped object, a second plate-shaped object, and a third plate-shaped object,
Each of the plurality of cutting edge portions has a plurality of back portions made of a second plate-like object on the rear side in the rotation direction of the metal saw.
The first plate-shaped object and the third plate-shaped object have higher rigidity than the second plate-shaped object.
The second plate-like material is a metal saw characterized by having higher toughness than the first plate-like material and the third plate-like material. In the metal saw according to any one of claims 1 to 3.
The first plate-shaped object and the third plate-shaped object are metal saws having an abrasive material. In the metal saw according to any one of claims 1 to 4.
A metal saw characterized in that the constituent elements of the first plate-shaped material and its ratio are different from the constituent elements of the second plate-shaped material and their ratios.

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