JP7335645B2 - Cutting tool and blade holder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cutting tool and a blade holder used when cutting a work.

Conventionally, a so-called cutting tool is used as a cutting tool for cutting a workpiece. This cutting tool cuts a relatively rotating external workpiece while being relatively fed in a predetermined direction. There are also so-called throw-away tools in which the cutting tip and the tip holder are separated from each other and the cutting tip can be exchanged, a complete tool in which the holder and the tip are integrated, and an attached edge tool.

Especially for mass production using an NC lathe, a throwaway tool with replaceable tips is used (see, for example, Patent Document 1).

FIG. 19A shows an example of a throwaway byte. This throwaway bit is composed of a throwaway tip 1130 and a holder 1120 . The indexable tip 1130 is screwed to the tip holder 1120, and when the cutting edge is worn or chipped, it is discarded without regrinding. When fixing to the dedicated holder 1120, there is no need to adjust the center height again, so replacement is easy and efficient, especially when mass production is performed using an NC lathe or the like.

FIG. 19B is a perspective view of the throwaway tip 1130 alone. The thickness B of the tip is usually 1 cm or less, and the tip is attached so as to protrude from the outer periphery of the tip holder 1120 .

JP-A-8-257837

In the conventional cutting tool, a groove or the like is formed on the rake face 1130H of the tip 1130 to bend the chips generated by cutting in both directions, thereby finely dividing the chips. This groove is called a chip breaker, and the chips finely divided by this chip breaker scatter in various directions. I had a problem.
In particular, when machining small diameter inner diameters, the chips are not ejected properly and remain in the work, and the chips get entangled in the blade or the tip of the tool, resulting in chipping of the blade or breakage of the chip. There were times when I was forced to Moreover, the cut pieces remaining in the work may damage the work.

Further, in order to perform cutting with higher precision, cutting chips and chip holders (bit holders) with less chatter than conventional ones are required.

SUMMARY OF THE INVENTION In view of such circumstances, an object of the present invention is to provide a cutting tool and a blade holding body capable of smoothly discharging chips during cutting automatically or spontaneously.

Other objects of the present invention and specific advantages obtained by the present invention will become clearer from the description of the embodiments described below.

The present invention, which solves the above problems, is a cutting tool that performs cutting while feeding a relatively rotating external work in a predetermined direction by means of a cutting edge that is provided integrally or separately. a base provided at the tip of the shank, a blade holder detachably attached to the base and arranged near the cutting blade, and a coolant flow path formed in the shank. , wherein the blade holding body has a cooling liquid inlet communicating with the cooling liquid outlet of the cooling liquid flow path, and has a cooling liquid discharge port that discharges the cooling liquid toward the cutting edge of the cutting blade. It is characterized by comprising a sex tube.

Further, in the cutting tool according to the present invention, a groove may be formed in the blade holder, and the flexible tube may be embedded in the groove.

Further, in the cutting tool according to the present invention, the cooling liquid outlet of the cooling liquid flow path and the cooling liquid inlet of the flexible tube may be elastically butted and connected. .

Moreover, the cutting tool which concerns on this invention WHEREIN: The said flexible tube shall consist of a silicone tube.

Further, in the cutting tool according to the present invention, the blade edge is formed on the outer peripheral surface of the base and/or the blade holder so as to start near the blade edge and extend toward the base end side of the shank. and a facet guide wall that interferes with the facets of the external work cut by the shank and guides the facets in a direction toward the base end side of the shank.

Further, in the cutting tool according to the present invention, the facet guide wall includes a blade holder-side guide wall formed around the cutting edge of the cutting blade on the outer peripheral surface of the blade holder, A base-side guide wall is formed on the base so as to be continuous with the body-side guide wall, and at least a part of the end-side wall surface of the blade-holder-side guide wall extends from the tip of the blade to the shank tip of the blade. A surface disposed on the side and facing the cutting edge can function as a discharge direction control surface.

The present invention is provided at the tip of the shank of a cutting tool that performs cutting while feeding a relatively rotating external work in a predetermined direction by means of a cutting edge that is provided integrally or separately. a blade retainer detachably attachable to the base and disposed proximate the cutting blade, the holding body having a coolant inlet extending toward the proximal end of the shank and the cutting blade; and a flexible tube having a coolant outlet for discharging toward the cutting edge of the blade.

Further, in the blade holder according to the present invention, the flexible tube may be embedded in the groove.

Also, in the blade holder according to the present invention, the flexible tube may be made of a silicone tube.

ADVANTAGE OF THE INVENTION According to this invention, the outstanding effect that the chip|cutting|cutting_chip at the time of cutting can be discharged|emitted outside very smoothly automatically or spontaneously is exhibited.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the cutting tool which concerns on embodiment of this invention, FIG.1(A) is an external perspective view of the cutting tool seen from the front-end|tip side diagonally above, FIG. FIG. 2 is an external perspective view of the cutting tool as seen obliquely from below. FIG. 2(A) is an exploded perspective view of the cutting tool seen obliquely from above on the tip side, and FIG. 2(B) is an exploded perspective view of the cutting tool seen from obliquely below from the tip side. FIG. 3 is an external perspective view of the cutting blade portion of the cutting tool as well as the blade portion holder viewed from below the front side. FIG. 4A is a sectional view showing the YZ section of the cutting tool, and FIG. 4B is a perspective view showing the YZ section of the cutting tool. FIG. 5(A) is a perspective view showing the XY section of the cutting tool, and FIG. 5(B) is a plan view showing the XY section of the cutting tool. FIG. 6A is a diagram showing a modified example of a cutting tool using a triangular positive tip with a hole as a cutting edge portion, and FIG. and FIG. 6B is an exploded perspective view of a modified cutting tool viewed obliquely from above on the tip side. FIG. 7(A) is an external perspective view of a modified cutting tool seen obliquely from above the rear end side, and FIG. 7(B) is an exploded perspective view of the modified cutting tool seen from obliquely above the rear end side. It is a diagram. FIG. 8A is a diagram showing a modification of a cutting tool using a square positive tip with a hole as a cutting blade, and FIG. FIG. 8(B) is an exploded perspective view of a modified cutting tool seen obliquely from above on the rear end side. FIG. 9A is an external perspective view of a modified cutting tool seen obliquely from above on the tip side, and FIG. 9B is an exploded perspective view of the cutting tool of a modification seen from obliquely above the tip side be. Fig. 10(A) is a diagram showing a modification of the cutting tool having a blade seat for housing the cutting blade on the tip surface of the base, and Fig. 10(A) is an appearance of the modification cutting tool viewed obliquely from above on the tip side. It is a perspective view, and FIG. 10B is an exploded perspective view of the cutting tool of the modification seen obliquely from above on the tip side. FIG. 11(A) is an external perspective view of a modified cutting tool seen obliquely from above the rear end side, and FIG. 11(B) is an exploded perspective view of the modified cutting tool seen from obliquely above the rear end side. It is a diagram. 12(A) is a plan view of the sensor-equipped chip and FIG. 12(B) is a side view of the sensor-equipped chip. FIG. be. FIG. 13A is a diagram showing an example of a cutting tool having a sensor-equipped chip as a cutting blade, and FIG. 13A schematically shows an electric path configured between the sensor-equipped chip and a blade holder. FIG. 13B is an exploded perspective view of the cutting tool, and FIG. 13B is an exploded perspective view of the cutting tool schematically showing an electrical path formed between the tip with sensor and the blade seat. FIG. 14 is an external perspective view of the blade holding body schematically showing the electronic circuit board incorporated therein. FIG. 15 is a schematic cross-sectional view of a blade holding body containing an electronic circuit board and a battery. FIG. 16A is a diagram showing an example of a cutting tool having an electronic circuit board built into a shank, and FIG. FIG. 16B is an exploded perspective view of the cutting tool schematically showing paths, and FIG. 16B is a diagrammatic view of the cutting tool showing the electrical paths directly formed between the sensor-equipped chip and the electronic circuit board; It is an exploded perspective view. FIG. 17 is a diagram showing the configuration of a cutting system constructed using a cutting tool having a chip with a sensor. FIG. 18(A) is an exploded perspective view of a cutting tool provided with a blade holding body integrated with a cutting blade, and FIG. 18(B) is a cutting tool provided with a base with an integrated cutting blade. is an exploded perspective view of the. FIG. 19(A) is a conceptual diagram of a conventional throwaway bit for threading, and FIG. 19(B) is a perspective view of a conventional throwaway insert for threading.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It goes without saying that the present invention is not limited to the following examples, and can be arbitrarily modified without departing from the gist of the present invention.

1 and 2 show a cutting tool 100 according to an embodiment of the present invention. The cutting tool 100 is a cutting tool that is attached to a cutting device (not shown) and performs cutting while relatively feeding an external work that rotates in a predetermined direction (axial direction of relative rotation). It becomes a cutting tool.

FIG. 1(A) is an external perspective view of the cutting tool 100 seen obliquely from above on the tip side, and FIG. 1(B) is an external perspective view of the cutting tool 100 seen from obliquely below from the tip side. FIG. 2A is an exploded perspective view of the cutting tool 100 seen obliquely from above on the tip side, and FIG. 2B is an exploded perspective view of the cutting tool 100 seen from obliquely below on the tip side.

The cutting tool 100 includes a cutting blade portion 10 having a cutting edge 10A, a base portion 20 having a blade seat 22 provided at the tip of a shank 21, and a screw 40 detachably attached to the base portion 20 for cutting. A blade holding body 30 is provided for housing the blade 10 in the blade seat 22 and holding the blade edge 10A in an exposed state. In FIG. 1, the left direction is the distal end side (front), and the right direction is the base end side (backward).

The cutting edge portion 10 of this cutting tool 100 is a rhombic positive tip with a hole having a clamping hole 11 in the center, and a cutting edge 10A is formed at the acute corner of the rhombus. is suitable for inner diameter machining of a work, but the present invention is not limited to this.

The material of the cutting tip used as the cutting edge portion 10 is desirably a high-hardness material such as a ceramic, a titanium-based material, or a cemented carbide, thereby improving wear resistance. can. As wear-resistant ceramics, aluminum oxide and silicon carbide with high hardness and high melting point, silicon nitride and zirconia with high toughness, and the like are preferable. In addition, if alumina having insulating properties is selected, it is possible to directly pattern a conductive pattern such as an electric path, which is preferable. The shape of the cutting edge 10 may be a rhombus, a parallelogram, a circle, a square, a triangle, a hexagon, or other shape.

The base portion 20 at the tip of the shank 21 of the cutting tool 100 is in contact with a mounting surface 22A on which the cutting blade portion 10 is mounted and two side surfaces of the cutting blade portion 10 opposite to the cutting edge 10A. A blade seat 22 is provided having side walls 22B and 22C.

Here, the axial direction of the cutting tool 100 is X, the horizontal direction perpendicular to the axial direction X is Y, and the vertical direction is Z. The cutting blade part 10 is accommodated, the cutting blade part 10 is mounted on the mounting surface 22A of the blade part seat 22, and the two side surfaces opposite to the blade edge 10A are on the side wall surfaces 22B and 22C of the blade part seat 22. By abutting, the mounting surface 22A and the side wall surfaces 22B and 22C of the blade seat 22 serve as a mounting surface as a reference surface for regulating the position of the cutting blade 10 to be accommodated in the height direction, that is, the vertical direction Z. 22A functions, and side wall surfaces 22B and 22C function as reference surfaces for regulating the position in the axial direction X and horizontal direction Y. Thus, the mounting surface 22A functioning as a reference surface for regulating the position in the vertical direction Z, and the side wall surfaces 22B and 22C functioning as reference surfaces for regulating the position in the axial direction X and the horizontal direction Y are attached to the blade seat 22. By providing it, the attachment position of the cutting edge portion 10 can be defined with high accuracy. The cutting edge portion 10 can be accurately attached to a predetermined position, and as a result, the life of the cutting edge portion 10 can be extended.

The blade holder 30 in this cutting tool 100 has a top wall 30A covering the upper surface of the cutting blade 10 housed in the blade seat 22 of the base 20 .

The top wall portion 30A of the blade holding body 30 has legs 31 and 32 having inner walls 31A and 32A with which approximately halves of the two side surfaces of the cutting edge 10A side of the cutting blade 10 abut. A dowel 33 to be inserted into the clamping hole 11 of the portion 10, a leg portion 36 having an inner wall surface 36A that abuts against the inclined outer wall surface 20A on the side of the base portion 20, and the like stand downward in the vertical direction Z. Further, screw insertion holes 34 for detachably attaching the blade holder 30 to the base 20 with screws 40 are formed in the ceiling wall 30A. Further, a cooling liquid flow path groove 35A is formed in the ceiling wall portion 30A, and a silicone tube 35 forming a cooling liquid flow path is embedded in the cooling liquid flow path groove 35A.

As shown in the external perspective view of FIG. 3 viewed from below the front side of the blade holder 30, the dowels 33 provided on the ceiling wall 30A are inserted into the clamp holes 11 of the cutting blade 10. The inner walls 31A and 32A of the legs 31 and 32 are in contact with substantially half of the two side surfaces on the cutting edge 10A side.

As shown in the XY cross-section of this cutting tool 100 in the cross-sectional view of FIG. 4A and the perspective view of FIG. A screw hole 23 is formed at a position corresponding to the screw insertion hole 34 , and the blade holder 30 of this cutting tool 100 holds the upper surface of the cutting blade 10 accommodated in the blade seat 22 of the base 20 . Covered with the top wall portion 30A, the cutting edge 10A of the cutting edge portion 10 protrudes in the horizontal direction Y, is held in an exposed state, and is detachably attached to the base portion 20 by the screw 40 inserted into the screw insertion hole 34. It has become.

Here, the dowels 33 erected on the top wall portion 30A of the blade portion holder 30 have an inclined guide surface 33A that is eccentrically tapered in the horizontal direction Y on its outer peripheral surface.

The dowels 33 erected on the ceiling wall portion 30A of the blade holder 30 are attached to the outer peripheral surface when the dowels 33 are inserted into the clamp holes 11 of the cutting blade 10 accommodated in the blade seat 22 of the base 20. Since the inclined guide surface 33A is in sliding contact with the wall surface of the clamping hole 11, the cutting edge 10 is guided in the direction opposite to the horizontal cutting edge 10A, and the side wall surface of the cutting edge 10 is brought into contact with the cutting edge. It functions as a position restricting member that presses against the side wall surfaces 22B and 22C of the seat 22 to restrict the position. In addition, the leg portion 36 erected on the top wall portion 30A of the blade portion holder 30 is brought into contact with the inclined outer wall surface 20A on the side of the base portion 20 with the inner wall surface 36A of the leg portion 36, so that the blade portion holder 30 is supported. It functions as a guide member when attaching to the base 20 .
The material of the blade holder 30 is desirably a high-hardness material such as ceramic, titanium-based material, die steel, cemented carbide, etc., thereby improving wear resistance. As wear-resistant ceramics, aluminum oxide and silicon carbide with high hardness and high melting point, silicon nitride and zirconia with high toughness, and the like are preferable. In addition, if alumina having insulating properties is selected, it is possible to directly pattern a conductive pattern such as an electric path, which is preferable.

In this cutting tool 100 , the blade seat 22 is provided on the base 20 to position the cutting blade 10 . It may be provided over both of the blade holders 30 . When the blade seat 22 is provided on the blade holder 30, a dowel 33 is provided on the base 20, and the side wall surface of the cutting blade 10 is guided by the inclined guide surface 33A of the dowel 33. The position is regulated by pressing against the side wall surface of the blade seat 22 provided on the blade holder 30 . When the blade seat 22 is provided on both the blade holder 30 and the base 20, a dowel 33 is provided on either the blade holder 30 or the base 20, and the inclined guide surface 33A of the dowel 33 is used for cutting. The blade portion 10 is guided, and the side wall surface of the cutting blade portion 10 is pressed against the side wall surface of the blade portion seat 22 provided on the blade portion holder 30 and the base portion 20 to regulate the position.

In addition, the cutting tool 100 is formed over the outer peripheral surfaces of the base 20 and the blade holder 30 so as to start near the cutting edge 10A of the cutting edge 10 and extend in a direction away from the cutting edge 10A rearward. It has a facet guide wall 25 which interferes with the facets of the external work and guides the facets away from the cutting edge.

The facet guide wall 25 is provided around the edge 10A of the outer peripheral wall of the blade holder 30 so as to expose the edge 10A of the cutting edge 10 housed in the edge seat 22 of the base 20 and protruding in the horizontal direction Y. A guide surface formed as a wall surface of the groove by shaving the portion corresponding to the portion in a concave shape, and formed substantially perpendicular to the rake surface 10B of the cutting edge 10 and a curved surface continuous with the guide surface in the circumferential direction. and a base side guide wall 25B formed by cutting the outer peripheral wall of the base 20 into a concave shape and having a guide surface continuous with the blade holder side guide wall 25A. .

The base-side guide wall 25B is branched in the middle of extending in the direction away from the cutting edge 10A to the rear, and includes a base-side guide wall 25C that is bent upward from the cutting edge 10. As shown in FIG. By adjusting the phase when the base part guide wall 25C is attached to a cutting device (not shown) of the base part 20, fine facets can be discharged by its own weight, and a series of fine facets can be smoothly and automatically removed. Can be excreted or spontaneously excreted.

A wall surface on the end side of the blade holder side guide wall 25A functions as a discharge direction regulation surface 25a.

The ejection direction regulation surface 25a is formed near the cutting edge 10A, is arranged on the shank tip side (front) of the cutting edge 10A with the cutting edge 10A as a reference, and faces the cutting edge 10A.

Since the discharge direction regulating surface 25a is a wall surface on the end side of the blade holder side guide wall 25A, it is continuous with the edge portion of the blade holder side guide wall 25A, providing a chip recovery space in the vicinity of the blade edge 10A. are in a dead end state in the axial direction X (relative feed direction). As a result, even if the chips generated from the cutting edge 10A try to advance forward of the base 20, they cannot advance because they interfere with the discharge direction regulating surface 25a. The direction (rearward) is limited, and the material is automatically or spontaneously discharged toward the base end side (rearward) along the faceted guide walls 25 (25A, 25B).

That is, in this cutting tool 100, the blade holding body 30 which is detachably attached to the base 20 having the blade seat 22 provided at the tip of the shank 21 by means of the screw 40 is formed separately for cutting. The tip holder accommodates the blade portion 10 in the blade portion seat 22 and holds the blade edge 10A in an exposed state. Extending in the direction toward the proximal end (rearward), it interferes with the facets of the external work and guides the facets in a direction away from the cutting edge 10A rearward, that is, in a direction toward the proximal end (rearward) of the shank. Since the facet guide wall 25 is formed over the outer peripheral surfaces of the base portion 20 and the blade portion holder 30, relative feeding is performed in a predetermined direction (axial direction X) with respect to the external work which is pivotally supported and relatively rotated. When performing cutting while moving, the guide of the facet guide wall 25 allows the facets during cutting to be expelled very smoothly to the outside automatically or spontaneously.
As a result, the cutting chips are smoothly ejected automatically or spontaneously even when machining small diameter inner diameters. There is no chipping of parts or breakage of chips. In addition, since the facets do not remain in the work, the work is not damaged by the facets that have stagnated.

Here, the facet guide wall 25 includes a blade holder side guide wall 25A formed so as to expose the cutting edge 10A of the cutting blade 10 on the outer peripheral surface of the blade holder 30, and the blade holder side guide wall 25A. A base side guide wall 25B is formed on the base 20 so as to be continuous with 25A. A wall surface on the end portion side of the side guide wall 25B may be made to function as a discharge direction regulating surface. Alternatively, both the end-side wall surface of the blade-holder-side guide wall 25A and the end-side wall surface of the base-side guide wall 25B may function as ejection-direction regulating surfaces.

That is, in the cutting tool 100, the facet guide wall 25 includes a blade holder side guide wall 25A formed on the outer peripheral surface of the blade holder 30 so as to expose the blade edge 10A of the cutting blade 10, and the blade holder side guide wall 25A. A base-side guide wall 25B is formed in the base 20 so as to be continuous with the part-holder-side guide wall 25A, and the wall surface on the end side of the base-side guide wall 25B is positioned in the relative feed direction with the cutting edge 10A as a reference. By being arranged in the shank tip direction (forward) of the cutting edge 10A and formed so as to face the cutting edge 10A, it can function as a discharge direction regulating surface. Further, the end-side wall surface of the blade holder-side guide wall 25A and the end-side wall surface of the base-side guide wall 25B are arranged in the shank tip direction (forward) of the blade edge 10A with the blade edge 10A as a reference, and , so as to face the cutting edge 10A, it can function as a discharge direction regulating surface.

It should be noted that the facet guide surface and the ejection direction regulation surface may be formed on the cutting edge 10 without being limited to the blade holder and the base.

Further, in the shank 21 of this cutting tool 100, as shown in the XY cross-sectional views of FIGS. A coolant channel is formed that communicates with the coolant channel formed by the silicone tube 35 embedded in the groove 35A.

The coolant inlet of the coolant channel formed by the silicone tube 35 is abutted with the coolant outlet of the coolant channel 21A on the shank 21 side so that the silicone tube 35 is airtight without liquid leakage. can be ensured by the elasticity of Instead of the silicone tube 35, a flexible tube such as a rubber tube or a non-flexible tube (pipe) can be used. The shape is not limited to a closed curved shape such as a circle, and may be, for example, a U-shaped cross section that is partially open.

In this cutting tool 100, the upper surface side of the cutting blade portion 10 accommodated in the blade portion seat 22 of the base portion 20 is covered by supplying the cooling liquid to the cooling liquid inlet of the cooling liquid flow path 21A on the shank 21 side. The cooling liquid can be discharged toward the exposed cutting edge 10A of the cutting blade 10 from a cooling liquid outlet provided in the ceiling wall 30A of the blade holder 30. FIG.

It is sufficient that the cutting edge holder 30 and/or the base 20 is provided with an outlet for the coolant that is discharged toward the cutting edge 10A of the cutting edge 10 .

An embodiment of the cutting tool 100 using a rhombic positive tip with a hole as the cutting edge portion 10 has been described. Next, as a modification of the cutting tool 100, FIGS. A cutting tool 200 using a triangular positive insert with a hole will be described with reference to (A) and (B).

FIG. 6A is an external perspective view of the cutting tool 200 seen obliquely from above on the tip side, and FIG. 6B is an exploded perspective view of the cutting tool 200 seen from obliquely above on the tip side. 7A is a perspective view of the cutting tool 200 seen obliquely from above on the rear end side, and FIG. 7B is an exploded perspective view of the cutting tool 200 seen from obliquely above the rear end side. .

In this cutting tool 200, constituent elements that are the same as or similar to those of the cutting tool 100 are denoted by the same reference numerals, detailed descriptions thereof are omitted, and different constituent elements are described in detail.

This cutting tool 200 has a base 20 in which a blade seat 122 accommodating a triangular positive tip with a hole as a cutting blade 110 is provided at the tip of a shank 21 .

The blade seat 122 of the base 20 has a placement surface 122A on which a triangular positive tip with a hole is placed as the cutting blade 110, and two positional controls with which the two sides of the cutting blade 110 abut. Walls 122B and 122C and dowels 123 to be inserted into clamping holes 111 of the cutting blade 110 are erected on the mounting surface 122A.

The blade holding body 130 in this cutting tool 200 has a top wall portion 130A covering the upper surface side of the cutting blade 110 housed in the blade seat 122 of the base 20. The upper surface side of the accommodated cutting blade 110 is covered with the top wall portion 130A, and the cutting edge 110A of the cutting blade 110 protrudes in the horizontal direction Y, is held in an exposed state, and is inserted into the screw insertion hole 34. It is detachably attached to the base 20 by screws 40 .

The dowel 123 erected on the mounting surface 122A of the blade seat 122 has an inclined guide surface 123A that is tapered eccentrically in the horizontal direction Y on its outer peripheral surface. When the cutting edge 110 is inserted into the clamping hole 111, the inclined guide surface 123A on the outer peripheral surface slides against the wall surface of the clamping hole 111, so that the cutting edge 110 is moved in the horizontal direction Y in the direction opposite to the cutting edge 110A. and presses the two side surfaces of the cutting blade 110 against the two position regulating walls 122B and 122C erected on the placement surface 122A to function as a position regulating member that regulates the position.

In addition, the cutting tool 200 starts near the cutting edge 110A of the cutting edge 110 and extends in a direction away from the cutting edge 110A, and is formed over the outer peripheral surfaces of the base 20 and the blade holder 130, It has a facet guide wall 25 that interferes with the facets of the external work and guides the facets away from the cutting edge 110A.

The face guide wall 25 extends around the cutting edge 110A of the outer peripheral wall of the blade holder 30 so as to expose the cutting edge 110A projected in the horizontal direction Y of the cutting blade 110 housed in the blade seat 122 of the base 20. A guide surface formed as a wall surface of the groove by shaving a portion corresponding to the portion in a concave shape, and formed substantially perpendicular to the rake surface 110B of the cutting edge portion 110 and a curved surface continuous with the guide surface in the circumferential direction. and a base side guide wall 25B formed by cutting the outer peripheral wall of the base 20 into a concave shape and having a guide surface continuous with the blade holder side guide wall 25A. . In addition, the facet guide wall 25 has an ejection direction regulating surface 25 a formed over the base 20 and the blade holder 30 .

The base-side guide wall 25B branches in the middle of extending in the direction away from the cutting edge 10A, and includes a base-side guide wall 25C that is bent upward from the cutting edge 10. As shown in FIG.

A wall surface on the end portion side of the blade holder side guide wall 25A is disposed on the advancing side of the blade edge 10A in the relative feeding direction with the blade edge 10A as a reference, and faces the retreating direction of the blade edge in the relative feeding direction. It functions as the regulation surface 25a.

Next, as a modified example of the cutting tool 200, referring to FIGS. 8(A), (B), FIGS. The tool 300 will be explained.

8A is an external perspective view of a modified cutting tool 300 seen obliquely from above the rear end side, and FIG. 8B is a perspective view of the modified cutting tool 300 seen obliquely from above the rear end side. It is an exploded perspective view. FIG. 9A is an external perspective view of a modified cutting tool 300 viewed obliquely from above on the tip side, and FIG. It is an exploded perspective view.

In this cutting tool 300, constituent elements that are the same as or similar to those of the cutting tools 100 and 200 are denoted by the same reference numerals, detailed descriptions thereof are omitted, and different constituent elements are described in detail.

This cutting tool 300 has a base 20 with a cutting edge 210 having a cutting edge seat 222 for accommodating a holed square positive tip at the tip of a shank 21 .

The blade seat 222 of the base 20 has a placement surface 222A on which a triangular square positive tip with a hole is placed as the cutting blade 210, and a dowel 223 inserted into the clamping hole 211 of the square positive tip with a hole. is erected on the placement surface 222A.

The blade holding body 230 in this cutting tool 300 includes a top wall portion 230A covering the upper surface side of the cutting blade 210 housed in the blade seat 222 of the base 20, and two orthogonal sides of the cutting blade 210. has two position regulating walls 231 and 232 with which the cutting blade 210 abuts, and the upper surface side of the cutting blade 210 housed in the blade seat 222 of the base 20 is covered with the ceiling wall 230A. The cutting edge 210A protrudes in the horizontal direction Y, is held in an exposed state, and is detachably attached to the base 20 by the screw 40 inserted into the screw insertion hole 34 .

The dowel 223 erected on the mounting surface 222A of the blade seat 222 has an inclined guide surface 223A whose outer peripheral surface is tapered eccentrically in the horizontal direction Y. When the cutting edge 210 is inserted into the clamp hole 211, the inclined guide surface 223A on the outer peripheral surface is in sliding contact with the wall surface of the clamp hole 211, thereby moving the cutting edge 210 in the direction opposite to the horizontal cutting edge 210A. It functions as a position regulating member that guides and presses the two orthogonal side surfaces against the two position regulating walls 231 and 232 on the blade holder 230 side to regulate the position, and the two position regulating walls 231 on the blade holder 230 side. , 232 function as reference planes for regulating the axial X and horizontal Y positions.

In addition, the cutting tool 300 starts near the cutting edge 210A of the cutting blade 210 and extends in a direction away from the cutting edge 210A, and is formed over the outer peripheral surfaces of the base 20 and the blade holder 230, It has a facet guide wall 25 that interferes with the facets of the external work and guides the facets away from the cutting edge 210A.

The facet guide wall 25 extends around the cutting edge 210A of the outer peripheral wall of the blade holder 30 so as to expose the cutting edge 210A projected in the horizontal direction X of the cutting blade 210 housed in the blade seat 222 of the base 20. A guide surface formed as a wall surface of the groove by shaving a portion corresponding to the portion in a concave shape, and formed substantially perpendicular to the rake surface 210B of the cutting edge portion 210 and a curved surface continuous with the guide surface in the circumferential direction. and a base side guide wall 25B formed by cutting the outer peripheral wall of the base 20 into a concave shape and having a guide surface continuous with the blade holder side guide wall 25A. .

Next, as a modified example of the cutting tool 100, a cutting tool 400 having a blade seat 322 for housing the cutting blade 310 on the tip surface of the base 20 will be described.

FIG. 10A is an external perspective view of the cutting tool 400 seen obliquely from above on the tip side, and FIG. 10B is an exploded perspective view of the cutting tool 400 seen from obliquely above on the tip side. 11(A) is a perspective view of the cutting tool 400 seen obliquely from above on the rear end side, and FIG. 11(B) is an exploded perspective view of the cutting tool 400 seen from obliquely above the rear end side. .

In this cutting tool 400, constituent elements that are the same as or similar to those of the cutting tool 100 are denoted by the same reference numerals, detailed description thereof is omitted, and different constituent elements are described in detail.

This cutting tool 400 has a base portion 20 at the tip portion of a shank 21 and having a blade seat 322 for housing a cutting blade portion 310 formed on the end face in the axial direction X. As shown in FIG.

The blade seat 322 of the cutting tool 400 has a placement surface 322A on which the cutting blade 310 is placed, and is provided with a position regulating wall 322B extending axially from the placement surface 322A. , dowels 323 to be inserted into the clamp holes 311 of the cutting blade 310 are erected on the placement surface 322A.

In addition, the cutting tool 400 includes a blade holder 330 having a ceiling wall 330A covering the upper surface of the cutting blade 310 accommodated in the blade seat 322 of the base 20 from the end surface in the axial direction X. , the upper surface side of the cutting blade 310 housed in the blade seat 322 of the base 20 is covered with the ceiling wall 330A, and the cutting edge 310A of the cutting blade 310 protrudes in the horizontal direction Y and is held in an exposed state. , and is detachably attached to the base 20 by a screw 40 inserted into the screw insertion hole 34 from the end face side in the axial direction X. As shown in FIG.

The blade holder 330 has a position regulating wall 331 against which one side surface of the cutting blade 310 housed in the blade seat 322 of the base 20 abuts.

The dowel 323 erected on the mounting surface 322A of the blade seat 322 has an inclined guide surface 323A that is tapered eccentrically in the horizontal direction Y on its outer peripheral surface. When the cutting edge 310 is inserted into the clamp hole 311, the inclined guide surface 323A on the outer peripheral surface is in sliding contact with the wall surface of the clamp hole 311, thereby moving the cutting edge 310 in the direction opposite to the horizontal cutting edge 310A. It functions as a position regulating member that guides and presses against the position regulating wall 322B on the side of the blade seat 322 and the position regulating wall 331 on the side of the blade holder 330 to regulate the position of the two side surfaces of the cutting blade 310. The position regulating wall 322B on the side of the seat 322 and the position regulating wall 331 on the side of the blade holder 330 function as reference planes for regulating the axial X and horizontal Y positions.
That is, the position regulating wall 322B and the position regulating wall 331 respectively have functions equivalent to those of the side wall surfaces 22B and 22C of the blade seat 22 in the cutting tool 100 shown in FIG. 2 described above.

In addition, the cutting tool 400 starts near the cutting edge 310A of the cutting edge 310 and extends in a direction away from the cutting edge 310A, and is formed over the outer peripheral surfaces of the base 20 and the blade holder 330, It has a facet guide wall 25 that interferes with the facets of the external work and guides the facets away from the cutting edge 310A.

The facet guide wall 25 extends around the cutting edge 310A of the outer peripheral wall of the blade holder 330 so as to expose the cutting edge 310A projected in the horizontal direction Y of the cutting blade 310 housed in the blade seat 322 of the base 20. A guide surface formed as a wall surface of the groove by shaving a portion corresponding to the portion in a concave shape, and formed substantially perpendicular to the rake surface 310B of the cutting edge portion 310 and a curved surface continuous with the guide surface in the circumferential direction. and a base side guide wall 25B formed by cutting the outer peripheral wall of the base 20 into a concave shape and having a guide surface continuous with the blade holder side guide wall 25A. .

A cutting blade portion 10 (110, 210, 310) having a cutting edge 10A (110A, 210A, 310A), and a shank 21 provided separately from the cutting blade portion 10 (110, 210, 310). A base 20 having a blade seat 22 (122, 222, 322) provided at the tip, and a screw 40 detachably attached to the base 20, and the cutting blade 10 (110, 210, 310). A blade holder 30 (130, 230, 330) that is accommodated in the blade seat 22 (122, 222, 322) and holds the blade edge 10A (110A, 210A, 310A) in an exposed state, and the blade edge 10A ( 110A, 210A, 310A) and extend away from the cutting edge 10 (110, 210, 310) on the outer peripheral surfaces of the base 20 and the blade holder 30 (130, 230, 330). It has a discharge direction regulating surface 25a formed over the base 20 and the blade holder 30 (130, 230, 330), and interferes with the cuts of the external work to push the cuts into the cutting edge. In the cutting tool 100 (200, 300, 400) having the facet guide wall 25 that guides in the direction away from the 10A (110A, 210A, 310A), the external work that is pivotally supported and relatively rotates is moved in a predetermined direction. When performing cutting while performing relative feeding, the guide of the facet guide wall 25 allows the facets during cutting to be discharged to the outside very smoothly automatically or spontaneously.

The cutting blade portion 10 (110, 210, 310) of this cutting tool 100 (200, 300, 400) can be removed by removing the blade portion holder 30 (130, 230, 330) from the base portion 20. The section 10 (110, 210, 310) can be removed from the blade section seat 22 (122, 222, 322) and replaced.

Here, the discharge direction regulating surface 25a provided on the facet guide wall 25 can be provided on either the base 20 or the blade holder 30 (130, 230, 330), but the blade holder 30 (130 , 230, 330), even if the ejection direction regulation surface 25a is damaged by guiding the facets in the ejection direction, it can be easily replaced.

In addition, a commercially available cutting tip can be accommodated in the blade seat 22 (122, 222, 322) provided on the base 20. As shown in FIG.

In the cutting tool 100 (200, 300, 400), the base 20 and the blade holder 30 (130, 230, 330) and the separate cutting blade 10 (110, 210, 310) are positioned and accommodated. The blade seat 22 (122, 222, 322) may be provided on the base 20 and/or the blade holder 30 (130, 230, 330).

Furthermore, a chip with a sensor for measuring the change can be used for the cutting edge 10 (110, 210, 310).

As a chip with a sensor, for example, a plan view of FIG. 12A and a side view of FIG. An electric path for measuring changes in the cutting blade is formed in all or part of the members of the cutting blade.

The sensor-equipped chip 50 shown in FIG. 12(A) is a rhombic positive chip with a hole. It has a blade portion 51A formed on the side edge and a blade portion 51B formed on both side edges of the nose 50B. An electric path 52B is formed on a plane and a side surface so as to include a nose 50B and a blade portion 51B, and a pair of external connection terminals 52TA are formed on both ends of the electric path 52A with the nose 50A interposed therebetween. . A pair of external connection terminals 52TB are formed at both ends of the conducting path 52B with the nose 50B interposed therebetween. A clamping hole 53 is provided in the center of the sensor-equipped chip 50 .

When using the sensor-equipped chip 50 having such a structure, for example, like a cutting tool 500A shown in the exploded perspective view of FIG. The electrical path C1 may be configured to be connected to the contacts provided on the body 30, or may be connected to the contacts provided on the blade seat 22, as in the cutting tool 500B shown in the exploded perspective view of FIG. 13(B). The electrical path C2 may be configured to connect.

The cutting tools 500A and 500B use the tip 50 with the sensor as the cutting edge portion 10 in the cutting tool 100 shown in FIG. Since the elements are the same as those of the cutting tool 100, detailed description thereof will be omitted.

When connecting the external connection terminals 52TA and 52TB of the sensor-equipped chip 50 to the contacts provided on the blade portion holder 30 to conduct the electric path, the sensor-equipped chip 50 is accommodated in the blade portion seat 22 and the blade portion 51B. Alternatively, in a state in which one side of the blade portion 51B is exposed and held, a current-carrying path having electrodes in contact with the external connection terminals 52TA and 52TB of the current-carrying paths 52A and 52B of the chip 50 with the sensor is provided on the blade holder 30 side. The electric path C1 can be formed by forming the electric path C1.

For example, as shown in FIG. 14, the electric path on the blade holder 30 side can be provided in the blade holder 30 as an electronic circuit board 61 .

In addition, as shown in the schematic cross-sectional view of FIG. 15, the blade portion holder 30 may include an electronic circuit board 61 and a battery 62 .

The electronic circuit board 61 provided in the blade portion holder 30 is equipped with, for example, a so-called RFID function composed of an analog circuit and/or an IC chip, etc., and is equipped with a central processing unit that controls all processing. a CPU, a high-speed memory RAM for reading and writing temporary data, a read-only memory ROM used for storing programs, a writable memory EPROM for storing data, and an electronic circuit board 61 It optionally has an interface for controlling external communication, an antenna for wirelessly communicating with the outside or supplying electric power using an external radio wave, and a resistance value detection unit as appropriate. The electronic circuit board 61 is also provided with an acceleration sensor.

The resistance value detection unit provided on the electronic circuit board 61 provided in the blade holder 30 simultaneously detects the resistance value of the conducting path by measuring the voltage value or current value, and at the same time, outputs this value as digital information (of course, an analog signal). process) and provided to the CPU. As a result, the resistance data is stored in the EPROM.

The acceleration sensor detects vibration, displacement and/or deformation of the electronic circuit board 61 and calculates displacement amount data of the cutting tool. This makes it possible to grasp the operation status of the cutting tool (swing width, bending, so-called chatter, etc.). The displacement data are stored in the EPROM. As the acceleration sensor, various methods such as a semiconductor method such as a capacitance type, a piezoresistive type, a gas temperature distribution type, etc. can be adopted in addition to the generally known vibration type and optical type.

The electronic circuit board 61 and battery 62 may be built in the shank 21 .
In this case, the electrical path between the sensor-equipped chip 50 and the electronic circuit board 61 is, as shown in the exploded perspective view of FIG. Alternatively, it may be connected directly from the chip 50 with the sensor without passing through the blade holder 30 like the electric path C4 schematically shown in the exploded perspective view of FIG. 16(B).

FIG. 16(A) schematically shows an electric path C3 formed between the tip 50 with sensor and the electronic circuit board 61 in the shank 21 via the blade holder 30 of the cutting tool 500C. It is an exploded perspective view. FIG. 16B is an exploded perspective view of the cutting tool schematically showing an electric path directly between the tip 50 with the sensor and the electronic circuit board 61 in the shank 21. As shown in FIG.

When passing through the blade holder 30, the blade holder 30 has chip-side terminals, wiring, and holder-side terminals, and the base 20 has contact points with the holder-side terminals of the blade holder 30. A body-side terminal and a wire having one end connected to the blade holder-side terminal may be provided, and the electronic circuit board 61 may be connected to the other end of the wire, and the battery 21 may be connected to the other end of the wire. If the blade holder 30 is not used, the base 20 may be provided with chip-side terminals having contacts with external connection terminals of the chip in place of the blade-holder-side terminals. good.

It should be noted that the electronic circuit board and the battery may not be provided on the side of the cutting tool such as the blade holder 30 and the base 20, but may be provided on the device main body side.

By providing the electronic circuit board 61 in the blade part holder 30, when the electronic circuit board 61 breaks down, the blade part holder 30 can be removed and replaced, or the electronic circuit board 61 can be repaired. . Furthermore, if the electronic circuit board 61 is provided with an external interface, data can be obtained from the electronic circuit board 61 by removing the blade holder 30 . Further, although the antenna is provided on the electronic circuit board 61 here, it can also be provided on the blade holder 30 or the base 20 separately from the electronic circuit board.

Further, power supply, chip resistance value data, cutting tool displacement data, etc. may be communicated by wire instead of wireless communication using an antenna.

A short-range wireless communication tag does not necessarily require a battery or storage battery. In this embodiment, the case where the battery 52 is built in is exemplified, but a battery box may be arranged outside and power may be supplied to the cutting head from this battery box in a wired and/or wireless manner. In this embodiment, the battery 52 is used to operate the sensor (energization path) of the cutting tool. It is also possible to Furthermore, the battery 52 can be omitted in the case of a passive RFID or the like that receives radio waves from an external reader or the like as energy and operates using this energy as a power supply.

A cutting tool using the sensor-equipped tip 50 having such a structure can construct a cutting system 1 configured as shown in FIG. 17 .

This cutting system 1 includes a cutting device 2, a plurality of cutting heads 3 equipped with cutting tools using chips with sensors provided in the cutting device 2, and a drive provided in the cutting device 2. It comprises a device 4 and an information gathering device 5 that is wired or wirelessly connected to the plurality of cutting heads 3 .

With the RFID function provided in each cutting head 3, the resistance value data and displacement data stored in the EPROM can be collected by the antenna at any time when the administrator collects information, at regular timing, or at irregular timing. It is transmitted to the outside (information collection device 5) via. Of course, the transmission of various acquired data may be wired or wireless, and may be analog or digital.

Information (individual identification information) for identifying an individual cutting tool is stored in the ROM or EPROM. The type, installation location (installation company), etc. can be registered. Thereby, each cutting tool can be managed individually. A part of the electronic circuit board 61 adopts so-called RFID technology using an IC chip, but the present invention is not limited to this, and other technologies may be used. , IC tags, long-distance wireless communication tags, and other wireless communication means can be employed.

As described above, the cutting tools 100, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20 years old, which are provided separately, have cutting edges 10, 110, 210, 310. 300, 400, 500A, 500B, 500C, and 500D have been described, but like cutting tools 600A and 600B shown in the exploded perspective views of FIGS. , 210, 310 can also be integrated with the base 20 or the blade holder 30, 130, 230, 330.

FIG. 18(A) is an exploded perspective view of a cutting tool 600A including a blade holding body 640A that integrates the cutting edge 610A of the cutting edge, and FIG. 18(B) shows a base 622B that integrates the cutting edge 610B. is an exploded perspective view of a cutting tool 600B.

In the cutting tool 600A, the cutting edge 610A of the cutting blade is integrated with the blade holder 640A which is detachably attached to the base 622A with the screw 40, and is inserted into the screw insertion hole 34 of the blade holder 640A. It is detachably attached to the base portion 622A by a screw 40 which is mounted on the base portion 622A. A screw hole 611A is formed at a position corresponding to the screw insertion hole 34 in the base portion 622A.

Further, in the cutting tool 600B, the cutting edge 610B of the cutting blade is integrated with the base 622B to which the blade holder 640B is detachably attached by the screw 40. The blade holder 640B is detachably attached to the base 622B by the screw 40 to be inserted. A screw hole 611B is formed at a position corresponding to the screw insertion hole 34 in the base portion 622B.

The cutting tools 600A, 600B are provided with blade holders 640A, 640B and bases 622A, 622B so as to start near the cutting edges 610A, 610B of the cutting blades and extend away from the cutting edges 610A, 610B. and has a facet guide wall 25 which interferes with the facets of the external work and guides the facets away from the cutting edges 610A and 610B.

The facet guide wall 25 is composed of a blade holder side guide wall 25A and a base side guide wall 25B having a guide surface continuous with the blade holder side guide wall 25A. Further, a wall surface on the end portion side of the blade holder side guide wall 25A functions as a discharge direction regulating surface 25a.

The base-side guide wall 25B branches in the middle of extending away from the cutting edges 610A and 610B, and includes a base-side guide wall 25C that is bent upward from the cutting edges 610A and 610B. By adjusting the phase when the base guide wall 25C is attached to a cutting device (not shown) of the bases 622A and 622B, the fine facets are discharged by their own weight, and a series of fine facets are smoothed out. can be discharged to

The ejection direction regulation surface 25a is formed in the vicinity of the cutting edges 610A and 610B and faces the relative feeding direction of the external work and the cutting edges 610A and 610B (here, the axial direction X of the shank 21). That is, the ejection direction regulation surface 25a is disposed on the advancing side of the blade edges 610A and 610B in the relative feeding direction with the blade edges 610A and 610B as a reference, and faces the retreating direction of the blade edges 610A and 610B in the relative feeding direction. there is

Since the ejection direction regulating surface 25a is a wall surface on the end side of the blade holder side guide wall 25A, it is continuous with the edge portion of the blade holder side guide wall 25A, and the facets in the vicinity of the blade edges 610A and 610B. The recovery space is in a dead-end state in the relative feeding direction. As a result, even if the chips generated from the cutting edges 610A and 610B try to advance to the tip side of the base portions 622A and 622B, they cannot advance because they interfere with the discharge direction regulation surface 25a. is limited to one direction, and is automatically or spontaneously discharged along the facet guide wall 25 (25A, 25B) toward the base end side.

That is, in the cutting tools 600A and 600B, the cutting chips are separated from the cutting edges 610A and 610B by interfering with the cutting edges of the external work so as to extend in the direction away from the cutting edges 610A and 610B from the vicinity of the cutting edges 610A and 610B. Since the facet guide walls 25 for guiding in the direction are formed over the outer peripheral surfaces of the blade holders 640A, 640B and the bases 622A, 622B, the external work which is pivotally supported and relatively rotated can be guided in a predetermined direction (axis When performing cutting while relatively feeding in the direction X), the guide of the facet guide wall 25 allows the facets during cutting to be discharged to the outside very smoothly automatically or spontaneously.

In the cutting tools 600A, 600B, the cutting edges 610A, 610B of the cutting blades integrated with the bases 622A, 622B or the blade holders 30, 130, 230, 330 are The cutting edges 10A, 110A, 210A, 310A, etc. can be used for various purposes.

In addition, in the cutting tools 100, 200, 300, 400, 500A, 500B, 500C, and 500D, similar to the cutting tools 600A and 600B, adopting a structure in which the base portion or the blade portion holder and the blade edge are integrated. can be done.

10, 110, 210, 310 Cutting edge portion 10A, 110A, 210A, 310A, 610A, 610B Cutting edge 10B, 110B, 210B, 310B Rake face 11, 111, 211, 311 Clamping hole 20, 622A, 622B Base 20A Outer wall 21 Shank 22, 122, 222, 322 Blade seat 22A, 122A, 222A, 322A Mounting surface 22B, 22C, 122B, 122C Side wall 23, 611A, 611B Screw hole 25 Faceted guide wall 25a Ejection direction regulating surface 25A Blade holder side guide wall 25B, 25C Base side guide wall 30, 130, 230, 330, 640A, 640B Blade holder 30A, 130A, 230A, 330A Top Wall 31, 32, 36 Leg 31A, 32A, 36A Inner wall 33, 123, 223, 323 Dowel 33A, 123A, 223A, 323A Guide surface 34 Screw insertion hole 35A Groove for coolant flow path Strip, 35 silicone tube, 40 screw, 50 chip with sensor, 50A, 50B nose, 51A, 51B blade, 52A, 52B current path, 52TA, 52TA external connection terminal, 61 electronic circuit board, 62 battery, 100, 200, 300, 400, 500A, 500B, 500C, 500D, 600A, 600B cutting tool, 231, 232, 322B, 332A position control wall, C1, C2, C3, C4 electric path

Claims (7)

A cutting tool that performs cutting while feeding a relatively rotating external work in a predetermined direction by a cutting edge that is provided integrally or separately,
a base provided at the tip of the shank;
a blade holder detachably attached to the base and arranged near the cutting blade;
a coolant flow path formed in the shank,
The blade holding body has a flexible tube having a cooling liquid inlet communicating with the cooling liquid outlet of the cooling liquid flow path and having a cooling liquid outlet for discharging the cooling liquid toward the cutting edge of the cutting blade. picture,
A groove is formed in the blade holder, and the flexible tube is embedded in the groove.
A cutting tool characterized by: The cutting tool according to claim 1 , wherein the cooling liquid outlet of the cooling liquid channel and the cooling liquid inlet of the flexible tube are elastically butted and connected. The cutting tool according to claim 1 or 2 , wherein the flexible tube is made of a silicone tube. A facet of the external work formed on the outer peripheral surface of the base and/or the blade holder, starting from the vicinity of the cutting edge and extending toward the proximal end of the shank, and cut by the cutting edge. 4. The cutting tool according to any one of claims 1 to 3, further comprising a facet guide wall that interferes and guides the facets in a direction toward the base end of the shank. The facet guide wall includes a blade holder-side guide wall formed around the cutting edge of the cutting blade on the outer peripheral surface of the blade holder, and a blade holder-side guide wall formed on the base so as to be continuous with the blade holder-side guide wall. At least a portion of the wall surface on the end portion side of the blade holder side guide wall is disposed on the shank tip side of the blade edge with respect to the blade edge and directed toward the blade edge. 5. The cutting tool according to claim 4 , wherein the recessed surface functions as a discharge direction control surface. At the base provided at the tip of the shank of a cutting tool that performs cutting while feeding in a predetermined direction relative to a relatively rotating external work with a cutting edge that is provided integrally or separately. A blade holding body that can be detachably attached and arranged in the vicinity of the cutting blade,
a flexible tube having a cooling liquid inlet extending toward the proximal end of the shank and having a cooling liquid outlet for discharging the cooling liquid toward the cutting edge of the cutting blade ;
The flexible tube is embedded in the groove
A blade holder, characterized by: The blade holder according to claim 6 , wherein the flexible tube is made of a silicone tube.