JP2022158465A - Cutting tool - Google Patents

Abstract

To provide, regarding a cutting tool such as a graver, a deburring tool, or a plastic cutter, a cutting tool as a hand-held machining tool capable of reducing local formation of a deep groove which is caused by locking or biting of a blade and which interferes with subsequent smooth cutting of the blade, and continuing deep cutting.SOLUTION: A blade tip 2 is composed of a ridge line formed through mutual intersection of a rake face 4 and a flank 3. A support 5a or 5b is provided at a position having a fixed distance from the blade tip 2 on at least one side of the rake face 4 and the flank 3, which can abut against a cut surface 8 in a state where the blade tip 2 is in contact with the cut surface 8 or the blade tip 2 has bitten into the cut surface 8.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to cutting tools such as carving knives, deburring tools, and plastic cutters for cutting or cutting materials such as wood, plastic materials, and metal materials. The present invention relates to a cutting tool that is composed of ridge lines formed by intersecting flanks and that is used as a hand-held tool.

Processing tools that have been used for cutting and cutting since ancient times include a vertical ax with a cutting edge that is approximately parallel to the handle and a horizontal ax with a cutting edge that is approximately right-angled. Chona and Khanna are known. There are many other things similar to the structure of the vertical ax around us, such as hand-held cutlery such as kitchen knives and knives, and horizontal pulling saws with nageshi, but other than the above, there are things similar to the structure of the horizontal ax, such as vertical saws. and not many.

The cutting edges of horizontal axes used in ancient times, such as chouna and planers, and the cutting edges of drills and end mills used in machining are composed of straight or curved ridges formed by the intersection of the rake face and the flank face. be done. During machining, the cutting edge is pushed into the work piece, chips are scooped up along the rake face on the advancing direction side of the cutting edge, and the flank face interferes with the work piece after the cutting edge advances. In order to avoid this, it is provided to have an appropriate angle.

The reason why the vertical ax is more commonly used than the horizontal ax is that the vertical ax simply presses the cutting edge against the workpiece and moves the blade in the direction of the ridge line that makes up the cutting edge to cut. On the other hand, as described above, since the direction of the ridgeline of the cutting edge of the horizontal ax is perpendicular to the direction of processing, the resistance to processing is large, and it is difficult to stably cut forward by hand.

The carving knives that are actually used in the classroom are flat knives, round knives, and kiridashi. It seems that there are more than a few people who have tried and failed.

7A and 7B are diagrams showing an example of cutting an object to be cut using a blade having a vertical ax structure, FIG. 7A is a perspective view, and FIG. It is sectional drawing which shows a state. In this way, even if an attempt is made to pull off the object 10 to be cut using a vertical axe-like blade 9 such as a kitchen knife or a knife, the blade bites in slightly, but the thickness of the blade, which gradually becomes thicker than the cutting edge, acts as a great resistance. , it is difficult to cut deeply.

In order to solve this problem, we actually made a small chinner with a ridgeline length of 10 mm and used it to cut wood and plastic materials. Since the biting occurs discontinuously, specifically, the stoppage due to catching and the advance of the blade due to its elimination occur alternately. It becomes impossible to process. Products similar to this example are sold on the Internet as scraping knives, board planes, oysters, sickles, etc., but they are rarely seen in stores such as home centers.

In the field of machining, the above-mentioned cutting method is established as a machining method that cuts with a cutting edge that has a rake face and a flank face on lathes and milling machines. By fixing the cutting tool to be cut on a solid table and adjusting the operation of the table itself, a mechanism is used in which the tip of the cutting tool comes into contact with the surface of the workpiece that rotates at high speed. is used depending on the object to be machined. For example, a face milling cutter uses a mechanism that rotates a cutting edge with a ridgeline from the center of rotation toward the outer circumference and abuts the workpiece fixed on a table. That is, in either case, a fixing mechanism is provided to prevent accidental deflection of the cutting edge or the workpiece due to mutual contact.

However, when performing cutting with hand-held tools, it is difficult to stably cut even into relatively soft materials such as wood and plastic materials due to the low rigidity that holds the blade. This phenomenon is particularly noticeable when processing wood at right angles to the wood grain. Hard wood grains are difficult to process, so they tend to become large irregularities, and plastics such as acrylic and polyethylene are soft, so localized bite progresses. It tends to be deep, making it difficult to cut deeply.

In addition, as a processing tool that can be cut, Patent Document 1 discloses a holder for applying force while supporting a blade body of a predetermined width for engraving lines on the surface of a model using a vertical ax structure blade body. , wherein the blade body can be exchangeably attached to a holder, and the direction of carving by the blade of the blade body can be changed to the front side or the front side. A carving knife is described.

However, although the carving knife disclosed here has a certain effect in improving the workability of carving due to the attachment structure of the holder and the blade, it is a knife with a narrow width and for digging very shallow lines. A width or depth of cut of mm or more is not assumed, and as described above, the thickness of the blade, which gradually becomes thicker than the cutting edge, acts as a great resistance, making it difficult to cut deeply.

JP 2012-034817 A

An object of the present invention is to reduce the formation of local deep grooves that are caused by catching or biting of the blade and hinder the smooth cutting of the blade after that, so that it is possible to continuously and deeply cut, and a hand-held processing tool. It is to provide a cutting tool that can be used as

In order to solve the above problems, the present invention has been made as a result of studies to provide a cutting tool having a horizontal ax structure with a structure for improving the stability of operation on the surface of a workpiece.

According to the present invention, the cutting edge is composed of a ridge line formed by intersecting the rake face and the flank face, and by moving the cutting edge toward the rake face side while pushing the cutting face into the cutting surface, the A cutting tool having a function of cutting a surface, wherein the cutting edge abuts the surface to be cut at a position having a certain distance from the cutting edge on at least one of the rake face side and the flank face side. It is possible to obtain a cutting tool characterized by being provided with a support portion capable of coming into contact with the surface to be cut in a state in which the cutting edge is cut or in a state in which the cutting edge bites into the surface to be cut.

Further, according to the present invention, the above-described cutting tool is obtained, wherein the rake face is composed of at least one flat surface or curved surface, and the flank surface is composed of at least one flat surface or curved surface. .

Further, according to the present invention, a concave portion having a width of 1 mm or more and a depth of 1 mm or more is provided between the cutting edge and the support portion provided on the rake face side, A cutting tool as described above is obtained.

Further, according to the present invention, the cutting tool described above is obtained, wherein the tip of the support portion has an obtuse angle or is chamfered with an R of 0.3 mm or more.

Further, according to the present invention, the straight line connecting the cutting edge and the tip of the support provided on the rake face side is parallel to the cut face, and the The above cutting tool is obtained, characterized in that the angle formed by the normal is -10° or more.

Since the cutting tool according to the present invention is provided with a support portion that abuts on the non-cutting surface at the same time as the cutting edge, there is a localized deep groove that is caused by the cutting edge being caught or biting, which hinders the smooth cutting of the blade thereafter. It is possible to provide a cutting tool capable of continuously and deeply cutting by reducing the formation of .

In addition, if cutting is performed while at least one of the two support portions provided on the rake face side and the flank side of the cutting edge is in contact with the surface to be cut at the same time as the cutting edge, the cutting edge may be damaged more than necessary. Since the supporting portion functions as a stopper to prevent the cutting object from biting into the material to be cut, that is, it functions in the same manner as the base of the table planer, cutting can be performed in a stable state.

In addition, by selecting the shape of the rake face and flank face from a flat surface or a curved surface, the shape of the cutting edge can also be varied, so it is possible to correspond to the material of the workpiece and the required groove shape.

In addition, since the space between the support portion on the rake face side and the cutting edge has a concave shape as described above, cutting chips generated during cutting are quickly discharged to the outside of the workpiece, and the cutting work can be carried out smoothly. Since the tip of the support portion is treated so as not to form a sharp point, the cutting work can be performed without damaging the surface of the object to be cut.

In addition, in the cutting tool of the present invention, by adjusting the relative positions of the support portion on the rake face side and the cutting edge, when the cutting edge abuts or bites into the cut surface, The angle formed with the rake face, that is, the rake angle can be set to -10° or more, which also improves the workability of cutting.

A diagram showing a blade portion of an example of a cutting tool according to the present invention. A diagram showing an example of a state in which a handle is attached to a blade and the blade is used to cut a surface of an object to be cut. FIG. 2 is a perspective view showing examples of various shapes of the cutting edge of the cutting tool according to the present invention; Example in which the blade of the cutting tool according to the present invention is replaceable A perspective view showing an example of carving a surface to be cut with a cutting tool according to the present invention. FIG. 2 is a conceptual diagram showing an example of proper arrangement of cutting edges in a cutting tool according to the present invention; A diagram showing an example of cutting an object using a blade with a vertical ax structure.

Next, embodiments of the present invention will be described with reference to specific drawings. 1A and 1B are diagrams showing a blade portion of an example of a cutting tool according to the present invention, FIG. 1A being a perspective view and FIG. 1B being a side view. In the blade 1 illustrated here, the cutting edge 2 is composed of a ridge line formed by the intersection of the flank 3 and the rake face 4, and the flank face 3 and the rake face 4 are spaced a certain distance from each other. A side support portion 5a and a rake face side support portion 5b are provided. The width of the cutting edge 2, ie w, depends on the thickness of the material from which the blade is constructed and is tailored according to the intended use.

In addition, as the cutting object is carved with the cutting edge 2, the frictional resistance between the side surface of the cutting edge 1 and the cutting material increases. . In general, the angle between the rake face 4 and the normal to the surface to be cut is called the rake angle. If it is inclined toward the support portion 5b, it becomes a - (minus) angle.

FIG. 2 is a diagram showing an example of a state in which a handle 6 is attached to the blade 1 shown in FIG. 2B shows a state in which the cutting edge 2 and the support portion 5b on the rake face side are in contact with the cut surface 8, and FIG. FIG. 2(c) shows a state in which the support portion 5a on the flank side and the support portion 5b on the rake face side are in contact with the surface to be cut, and the cutting edge 2 bites into the object to be cut. Cutting is performed by moving the cutting edge 2 in the direction of the handle 6 in the figure while pushing it into the surface 8 to be cut.

With this configuration, for example, when the handle 6 is moved downward while the support portion 5a on the flank side is pressed against the surface 8 to be cut, the cutting edge 2 gradually approaches and contacts the surface 8 to be cut. In this state, if the entire blade 1 is moved back and forth like a saw, and left and right in the drawing, the cutting edge 2 gradually cuts into the object 7 to be cut in the depth direction, so that local hooking is less likely to occur.

In addition, if there is unevenness such as a hard grain or a step, cutting can be advanced by adjusting the up-down and back-and-forth movement of the handle 6 depending on the response such as catching and cutting resistance. Also, in the case of a large thin plate, it may be cut along a guide ruler or the like.

Similarly, the support portion 5b on the rake face side may be machined while being brought into contact with the surface 8 to be cut. For example, when machining up to the right end of the workpiece 7 in FIG. 2, the support portion 5b on the rake face side is first disengaged from the workpiece surface 8, and the cutting edge 2, which is still on the workpiece 7, tends to bite due to the instantaneous impact. In such a case, it is possible to switch to the support portion 5a on the flank side for processing.

Furthermore, it is also possible to make the cutting edge 2 bite into the object 7 to be cut and bring the support portion 5a on the flank side and the support portion 5b on the rake face side into contact with the surface 8 to be cut at the same time. In this case, either one or both of the support portions function as stoppers as described above.

If even a portion of the handle 6 protrudes toward the cut surface 8 from the extension line connecting the cutting edge 2 and the support portion 5a on the rake face side, the handle 6 will be removed before the support member 5b on the rake face side. contact with the surface 8 to be cut, which interferes with the angle adjustment.

Conversely, when both the support portion 5a on the flank side and the support portion 5b on the rake face side are provided, the support portion 5b on the rake face side extends from the extension line connecting the support portion 5a on the flank face side and the cutting edge 2. If the cutting edge 2 protrudes toward the cut surface 8, the cutting edge 2 cannot contact the cutting surface 8. Therefore, at least when the cutting edge bites into the cut object 7, the support portions 5a and 5b are in contact with the cut surface 8. need to abut.

Therefore, when making a deep cut into the workpiece 7, it is desirable that the pair of side surfaces of the blade 1 adjacent to the rake face 4 and the flank face 3 do not have protrusions such as retaining connections.

Moreover, when the cutting edge 2 cuts deeply into the workpiece 7, the problem of chip evacuation becomes a problem. , and the cutting edge 2 cannot be exposed, making machining impossible. In order to prevent this, it is desirable to provide a recess with a width and depth of 1 mm or more between the flank 3 of the blade 1 and the support 5a on the flank side.

Further, if the tips of the support portion 5a on the flank side and the support portion 5b on the rake face side are pointed, in addition to the cutting edge 2 being caught, the support portions are likely to bite into or get caught on the workpiece 7. , It is desirable that the tip has an obtuse angle or a chamfer with a radius of 0.3 mm or more.

In addition, if the thickness of the blade 1 is greater than the width of the cutting edge 2, the contact area between the side surface of the blade 1 and the workpiece increases as it cuts into the workpiece 7 in the depth direction, resulting in machining resistance. As described above, such a structure is undesirable because of the increase in . For the same reason, it is not desirable that the thickness of the support portion 5a on the flank face side and the support portion 5b on the rake face side be larger than the width of the cutting edge 2.

FIG. 3 is a perspective view showing examples of various shapes of the cutting edge of the cutting tool according to the present invention. As described above, the cutting edge of the cutting tool of the present invention is formed by the ridgeline formed by the intersection of the rake face and the flank face, so that various shapes can be obtained by combining the shapes of the rake face and the flank face.

FIGS. 3(a) and 3(b) show an example in which both the rake face and the flank face are flat, the ridges are straight, and the lengths are different. FIG. 3(c) shows an example in which the rake face is flat, the flank face is curved, and the ridge line is curved. Fig. 3(d) shows an example in which the rake face is flat, the flank is curved, and the ridge is straight. Fig. 3(e) is an example in which both the rake and flank are curved, and the ridge is straight. . These shapes are used when it is necessary to adjust the angle of the rake face and flank face depending on the material of the workpiece.

Fig. 3(f) shows an example of a cutting tool manufactured by cutting a cylindrical material with a lathe or the like. The ridge line that forms the cutting edge is circular, and there is a feature that any part of the ridge line can be used as the cutting edge. FIGS. 3(g) and 3(h) are examples in which a saw blade is provided with the structure of the cutting tool according to the present invention, and FIGS. Fig. 3(j) shows an example manufactured by applying processing.

FIG. 4 shows an example of a cutting tool according to the present invention in which the blade 11 is replaceable. In the cutting tool according to the present invention, it is the cutting edge 12 that is basically worn out. Therefore, as shown in FIG. It is also possible to make a structure in which 15 is an elongated hole and the protruding margin of the cutting edge 12 can be finely adjusted.

Further, by providing a stopper 13 wider than the blade 11 at a position on the flank face side or the rake face side of the blade 11, the stopper 13 restricts the cutting of the blade 11 in the depth direction of the object to be cut (not shown). , can be grooved at a constant depth. This stopper 13 also functions as a support.

In addition, when cutting a thin plate, partial penetration can reduce cracking of the relevant portion and disturbance of the cross section, so that it may be used in combination with another cutting tool after that. As for the number of cutting edges 12, one is the lowest cutting resistance and is easy to re-grind when worn or chipped, but there may be more than one.

The angle of the rake face of the blade 11 is appropriately selected according to the physical properties of the material to be cut. It is not desirable because it deteriorates extremely. It is preferable that the rake face and the flank face be ground because it is difficult to form a straight ridgeline on the cutting edge 12 by rough cutting or punching with a press. Furthermore, a serrated blade may be provided between the rake face side support portion 16 and the handle 17, and used together at the cutting start portion, the cutting end portion, and the through portion.

FIG. 5 is a conceptual diagram showing an example of proper arrangement of cutting edges in a cutting tool according to the present invention. In the cutting tool according to the present invention, as shown in FIG. 5, the base angle θ2 of an isosceles triangle whose base is a straight line connecting the support portion 5a on the flank side and the support portion 5b on the rake face side is within 45°. It is desirable that the cutting edge 2 is arranged in the range of . The example in FIG. 5A is 10°.

The reason for this is that, as shown in FIG. 5(b), if the cutting edge 2 is arranged near the position where the base angle of an isosceles triangle is 45°, the supporting portion 5b on the rake face side will not touch the workpiece. In the case of contacting and machining, and in the case of contacting the flank side support portion 5a to the workpiece for machining, the position of the handle integrated with the cutting edge is rotated by 90° or more. If θ2 exceeds 45°, it becomes difficult to hold the handle while processing.

Furthermore, when the support portion 5b on the rake face side is brought into contact with the surface to be cut while θ2 is greater than 45°, the rake angle becomes smaller and the sharpness is reduced. If the support portion 5a on the flank side is brought into contact with the cut surface, the rake angle becomes too large, and the angle at which the flank and the rake face intersect inevitably becomes too small, reducing the strength of the cutting edge. Undesirable to degrade.

Embodiments of the invention will now be described below with reference to the drawings. FIG. 6 is a perspective view showing an example of forming a cut surface with the cutting tool according to the present invention.

As Example 1, a cutting tool was prepared with a cutting edge width of 1.0 mm, a cutting edge width of 0.8 mm, a support portion width of 0.8 mm on the rake face side, and a rake angle of 10° with respect to the cut surface. did. The shape of this cutting tool is shown in FIG. 3(a). FIG. 6(a) shows an example of cutting by using this. Since this cutting tool has a narrow cutting edge width, the cutting resistance is small, and it was possible to easily cut a 5 mm thick acrylic plate prepared as a workpiece along the guide ruler to a depth of 3 mm. In addition, there were cases where the blade partially penetrated the acrylic plate and was completely caught, but if necessary, by processing from the back side and folding the acrylic plate, it was possible to cut without problems. rice field.

In addition, a 5 mm-thick wooden board was prepared as an object to be cut, and it was possible to cut it out by partially penetrating it. In other words, it is now possible to perform the cutting process, which conventionally requires making a spare hole and cutting through it with a jigsaw or the like, without using a spare hole. I was able to get

As Example 2, a cutting tool having the same configuration as that of Example 1 and having a support portion on the flank side was prepared. This cutting tool was able to cut efficiently by using either the support portion as a fulcrum at the end of the cutting start or the end of cutting, which is likely to be caught in the work piece.

As Example 3, a cutting tool was prepared with a cutting edge width of 11 mm, a cutting edge width of 11 mm, a support portion width of 11 mm on the rake face side, and a rake angle of 0°. The shape of this cutting tool is shown in FIG. 3(b). An example of cutting using this is shown in FIG. 6(b). Using this cutting tool, it was possible to partially process grooves with a width of 11 mm in a workpiece made of wood or acrylic plate.

These partial machining forms such as grooves and steps were conventionally possible by milling and chiseling, but it was confirmed that the cutting tool according to the present invention is also possible. In addition, it was possible to scrape off the printing on the surface of plastic cards, name cards, etc., which are objects to be cut, so thinly that they cannot be felt by touch, and restore the state before printing. In addition, deburring and chamfering of edges (edges) of processed products such as aluminum and iron and moldings can be easily performed.

As Example 4, a cutting tool was prepared in which the cutting edge and the tip of the supporting portion on the rake face side were formed into a body of revolution shape with the outer periphery of rotation. The shape of this cutting tool is shown in FIG. 3(f). An example of cutting using this is shown in FIG. 6(c). According to this cutting tool, it was possible to safely and easily carve grooves having an arcuate cross-section in an object to be cut made of wood or plastic material. In addition, it was possible to remove protrusions, burrs, dirt, etc. on the corners of the inner diameter of the workpiece.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to provide a handheld cutting tool that facilitates the work of cutting and cutting plastic materials and wood. It should be noted that the present invention is not limited to the above-described embodiments, and includes various modifications and modifications that can be conceived by those who have ordinary knowledge in the field of the present invention, without departing from the gist of the present invention. Even if there is a design change in the range, it is of course included in the present invention.

1, 11 blades
2, 12 cutting edge 3 flank
4 Rake face 5a Support part on flank face side
5b, 16 rake face side support 6 handle 7, 10 workpiece
8 surface to be cut 9 blade
13 stopper 14 screw
15 long hole

According to the present invention, the cutting edge is composed of a ridge line formed by intersecting the rake face and the flank face, and by moving the cutting edge toward the rake face side while pushing the cutting face into the cutting surface, the A cutting tool having a function of cutting a surface, wherein the tip has an obtuse angle or R processing at a position at a certain distance from the cutting edge on at least one of the rake face side and the flank face side. It has a chamfered shape and is provided with a support portion that can contact the surface to be cut in a line or a point, so that when the surface to be cut is cut, the cutting edge touches the surface to be cut. A cutting tool characterized by continuously adjusting the depth of cut of the cutting edge with either one of the supporting portions as a fulcrum from a contact state to a state in which the cutting edge bites into the surface to be cut. can get.

Further, according to the present invention, the above-described cutting tool is obtained, wherein the tip of the support portion is chamfered with an R of 0.3 mm or more .

Further, according to the present invention, the straight line connecting the cutting edge and the tip of the support portion provided on the rake face side is arranged parallel to the surface to be cut. The above cutting tool is obtained, characterized in that the angle formed by the normal is -10° or more.

As Example 2, a cutting tool having the same configuration as that of Example 1 and having a support portion on the flank side was prepared. This cutting tool was able to cut efficiently by using either the support portion as a fulcrum at the end of the cutting start or the end of cutting, which is likely to be caught in the workpiece.

According to the present invention, the cutting edge is composed of a ridge line formed by intersecting the rake face and the flank face, and by moving the cutting edge toward the rake face side while pushing the cutting face into the cutting surface, the A cutting tool having a function of cutting a surface, wherein the cutting edge abuts the surface to be cut at a position having a certain distance from the cutting edge on at least one of the rake face side and the flank face side. It is possible to obtain a cutting tool characterized by being provided with a support portion capable of coming into contact with the surface to be cut in a state in which the cutting edge is cut or in a state in which the cutting edge bites into the surface to be cut.
According to the present invention, the cutting edge is composed of a ridge line formed by intersecting the rake face and the flank face, and by moving the cutting edge toward the rake face side while pushing the cutting face into the cutting surface, the A cutting tool having a function of cutting a surface, wherein the tip has an obtuse angle or R processing at a position at a certain distance from the cutting edge on at least one of the rake face side and the flank face side. It has a chamfered shape and is provided with a support that can contact the surface to be cut linearly or in a point. When cutting a cutting surface, the cutting edge cuts from a state in which the cutting edge is in contact with the cutting surface to a state in which the cutting edge bites into the cutting surface, with at least one of the supporting portions as a fulcrum. A cutting tool is obtained which is characterized by a continuously adjustable depth.
According to the present invention, the cutting edge is composed of a ridge line formed by intersecting the rake face and the flank face, and by moving the cutting edge toward the rake face side while pushing the cutting face into the cutting surface, the A cutting tool having a function of cutting a surface, wherein the tip has an obtuse angle or R processing at a position at a certain distance from the cutting edge on at least one of the rake face side and the flank face side. A support portion having a chamfered shape and capable of coming into contact with the surface to be cut in a linear or point fashion is provided, and the support portion has a thickness equal to or less than the width of the cutting edge, When viewed from the direction of pushing into the surface to be cut, the support portion is on a straight line in the direction in which the cutting edge is moved toward the rake surface, and when cutting the surface to be cut, the cutting edge moves to the surface to be cut. Cutting characterized in that the depth of cut of the cutting edge is continuously adjusted with at least one of the supporting portions as a fulcrum from a state in which the cutting edge is in contact with the surface to a state in which the cutting edge bites into the surface to be cut. You get a tool.

Claims (5)

The cutting edge is composed of a ridgeline formed by the intersection of the rake face and the flank face, and the function of cutting the cut surface is achieved by moving the cutting edge toward the rake face while pushing it into the cut surface. wherein the cutting edge is in contact with the surface to be cut at a position having a certain distance from the cutting edge on at least one of the rake face side and the flank face side, or the cutting edge A cutting tool characterized by comprising a support portion capable of coming into contact with the surface to be cut in a state in which the cut surface is bitten into the surface to be cut. 2. The cutting tool according to claim 1, wherein the rake face is selected from flat or curved surfaces, and the flank face is selected from flat or curved surfaces. A recess having a width of 1 mm or more and a depth of 1 mm or more is provided between the cutting edge and the support provided on the rake face side. A cutting tool as described. 4. The cutting tool according to any one of claims 1 to 3, wherein the tip of said support portion has an obtuse angle or is chamfered with an R of 0.3 mm or more. The angle formed by the normal to the rake face and the face to be cut when the straight line connecting the cutting edge and the tip of the support provided on the rake face side is parallel to the face to be cut is - The cutting tool according to any one of claims 1 to 4, characterized in that the angle is 10° or more.

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