JP7361783B2 - Cutting structure and data acquisition system - Google Patents

Description

The present disclosure relates to cutting structures, data acquisition systems, and cutting tools.

2. Description of the Related Art A cutting structure is known that is attached to a machine tool and cuts a part of an object (wood, metal, etc.) into a desired shape or size. The cutting structure includes, for example, a cutting tool having a cutting edge and a tool post that holds the cutting tool. As a cutting tool, a cutting tool described in Patent Document 1 below is known.

US Patent Application Publication No. 2019/0030672

A cutting structure according to one aspect of the present disclosure includes a cutting tool having a cutting edge and a tool rest holding the cutting tool. The cutting tool includes a base, a tip, and a sensor. The base body is held by the tool post and includes a shank portion extending from the first end toward the second end, a fixing portion located closer to the first end than the shank portion, and a recess portion opening on the outer surface of the shank portion. and has. The tip is fixed to the fixed part and has a cutting edge. A sensor is located within the recess. The tool rest has a mounting surface and one or more biasing parts. A base body is placed on the placement surface. The one or more biasing parts have a contact surface that contacts the shank part, and bias the shank part from the contact surface toward the mounting surface. At least a portion of the contact surface is separated from the recess when viewed in a plan view in the biasing direction of the biasing portion.

FIG. 1 is a diagram schematically showing the entire data collection system in the first embodiment. FIG. 2(a) is a diagram showing a state before the cutting tool is fixed to the tool rest shown in FIG. 1, and FIG. It is a figure showing the state where a tool was fixed. FIG. 2 is a perspective view of the cutting tool shown in FIG. 1; 4 is a sectional view taken along the line IV-IV shown in FIG. 3. FIG. 5 is an enlarged view of region V shown in FIG. 4. FIG. 3 is a sectional view taken along the line VI-VI shown in FIG. 2. FIG. FIG. 1 is a block diagram showing the configuration of a data collection system. FIG. 8(a) is a diagram showing a cutting tool in the second embodiment, and FIG. 8(b) is an enlarged diagram of region VIIIb in FIG. 8(a). FIG. 9(a) is a diagram showing a cutting tool in the third embodiment, and FIG. 9(b) is an enlarged diagram of region IXb in FIG. 9(a). FIG. 10(a) is a diagram showing a cutting tool in the fourth embodiment, and FIG. 10(b) is an enlarged diagram of region Xb in FIG. 10(a). FIG. 11(a) is a diagram showing a cutting tool in the fifth embodiment, and FIG. 11(b) is an enlarged diagram of region XIb in FIG. 11(a).

Embodiments of the present disclosure will be described below using the accompanying drawings. In addition, in the explanation, "front and back" is a term used to specify the positional relationship along the longitudinal direction of the cutting tool, and the side where the tip is located in the longitudinal direction is conveniently defined as the front, and the front in the longitudinal direction is defined as the front. The opposite side is conveniently determined as the rear. Left and right is a term used to specify the positional relationship when the end of the cutting tool is viewed from the rear. Up and down is a term used to specify the positional relationship when looking at the end of the cutting tool from the rear, similar to left and right, and is a term used to specify the positional relationship in the direction perpendicular to the left and right. . In the figure, Fr indicates front, Rr indicates rear, Le indicates left, Ri indicates right, Up indicates top, and Dn indicates bottom. Furthermore, the drawings referred to are shown schematically, and details may be omitted.

In describing the technology according to the present disclosure, expressions representing directions such as front, rear, left, right, and up and down are used in some places. These expressions are used for convenience in relation to the figures to explain the technology according to the present disclosure, and are not intended to limit the technology according to the present disclosure. For example, the tip is not limited to the front end (front end), and the rear end is not limited to the rear end. In other words, the leading end can be read as one end (one end), and the rear end can be read as the other end (the other end). Further, expressions regarding the vertical direction, horizontal direction, etc. are also the same.

[First embodiment]
(Data collection system)
Please refer to FIG. As in the example shown in FIG. 1, the data collection system 10 may include a tool rest 20, a cutting tool 30 (for example, a turning tool), and an information processing device 12. The tool post 20 is one of the components of the machine tool Mt. The cutting tool 30 may be fixed to the tool rest 20 and may have a function that allows information to be input to the external information processing device 12. The information processing device 12 can collect information input from the cutting tool 30. The machine tool Mt and the tool rest 20 will be explained below, and then the cutting tool 30 and the information processing device 12 will be explained.

(Machine Tools)
The machine tool Mt may be a machine used to cut (process) the object Ob into a desired shape and dimensions. The machine tool Mt may include a tool rest 20 that holds a cutting tool 30. The cutting tool 30 held on the tool rest 20 can be moved forward, backward, left and right, and up and down, for example, by manual or automatic operation of the machine tool Mt. Through such an operation (automatically or manually), for example, the cutting tool 30 is pressed against the rotating object Ob (wood, metal, etc.). As a result, the object Ob is cut. Usually, the object Ob to be cut is called a workpiece.

(turret)
See FIG. 2. The tool rest 20 includes, for example, a side contact portion 21, a first protrusion 22, a second protrusion 23, a screw hole 24, and a plurality of urging portions 25 (three in the figure). You may do so.

The side surface of the cutting tool 30 may be in contact with the side surface contact portion 21 . The first protruding portion 22 may protrude from the side surface of the side surface abutting portion 21 toward the side (rightward direction). The second protrusion 23 may protrude laterally (rightward) from the side surface of the side abutment part 21 and may face the first protrusion 22 . The combination of the side abutting portion 21, the first protruding portion 22, and the second protruding portion 23 may be understood as a tool rest main body. The turret main body may be entirely integrally made of a suitable material such as metal, for example. However, the tool rest main body may be configured by a plurality of members being fixed to each other. The specific material and dimensions of the tool rest main body are arbitrary.

In other words, the screw hole 24 is a female thread and has a thread groove on the inner peripheral surface of the hole. The screw hole 24 may vertically penetrate the second protrusion 23 . The plurality of biasing parts 25 may be screwed into the screw holes 24 and may be members that bias the cutting tool 30 toward the first protrusion 22 . The biasing portion 25 may be configured by, for example, a general screw (external screw, bolt). The screw may have a shaft-shaped male threaded portion having a thread groove formed on its outer circumferential surface, and a screw head located at the rear end of the male threaded portion and having a diameter larger than the diameter of the male threaded portion. The shape of the screw head (from another perspective, the method of transmitting force around the axis to the screw head) may be of various known shapes. For example, the screw head may have a polygonal shape (for example, a hexagonal shape) when viewed in the axial direction, and a −-shaped groove, a +-shaped groove, or a polygonal shape (for example, a hexagonal shape) on the end surface opposite to the male thread. It may be formed with a rectangular concave portion (the shape of the outer peripheral surface does not matter). The material and dimensions of the biasing portion 25 are arbitrary. The material of the biasing portion 25 may be, for example, metal.

The first protrusion 22 may have a placement surface 22a located on its upper surface. The cutting tool 30 may be placed on the placement surface 22a. The second protrusion 23 may have a facing surface 23a facing the mounting surface 22a. As shown in FIG. 6, the biasing portion 25 may have a contact surface 25a that comes into contact with a shank portion 70 of a cutting tool 30, which will be described later. The contact surface 25a may contact the shank portion 70 and urge the cutting tool 30 toward the mounting surface 22a. Thereby, the cutting tool 30 may be fixed to the tool post 20. The number of biasing parts 25 that the tool rest 20 has can be set arbitrarily. That is, the number of urging parts 25 may be one, two, or four or more. As is clear from the fact that there may be a plurality of urging parts 25, there may also be a plurality of contact surfaces 25a. As in the example shown in FIG. 2, the mounting surface 22a and the opposing surface 23a may be parallel to each other. Note that the shape of the tool post 20 is not limited to the shape shown in FIG. 2. The specific structure of the tool rest 20 that can hold the cutting tool 30 may be any suitable structure.

The tool rest 20 in which the cutting tool 30 is held (positioned) is referred to as a cutting structure 11. That is, it can be said that the cutting structure 11 is a structure consisting of the cutting tool 30 and the tool post 20.

(Cutting tools)
The cutting tool 30 is detachably attached to the machine tool Mt (turret 20). The cutting tools 30 include an outer diameter cutting tool for cutting the outer diameter of the object Ob, an inner diameter cutting tool for cutting the inner diameter of the object Ob, a grooving tool for forming grooves etc. on the object Ob, a threading tool, a parting tool, etc. can be mentioned. The cutting tool 30 can also be called a cutting tool.

See FIG. 3. The cutting tool 30 includes, for example, a holder 50, a tip 40 fixed to a tip 50a (hereinafter also referred to as a first end 50a) side of the holder 50, and a clamp 31 for fixing the tip 40. It's fine.

(Chip and structure around the chip)
The tip 40 may be, for example, a replaceable insert called a throw-away tip. The chip 40 may be located within a cutout 66a of the holder 50 that is cut out on the first end 50a side, and may be fixed by the clamp 31. The shape of the chip 40 can be set arbitrarily. The shape of the chip 40 may be changed depending on the material, shape, etc. of the object Ob (see FIG. 1). As in the example shown in FIG. 3, the chip 40 may have a square plate shape. In other embodiments, the chip 40 may have a triangular plate shape or a pentagonal plate shape.

The size of the chip 40 can be set arbitrarily. The thickness (length in the vertical direction) of the chip 40 may be, for example, 5 mm or more and 20 mm or less. The width (length in the left-right direction) of the chip 40 may be, for example, 10 mm or more and 20 mm or less. The size of the chip 40 may be changed depending on the material of the object Ob.

The material of the chip 40 can be set arbitrarily. For example, the material of the tip 40 may be cemented carbide, cermet, or the like. The composition of the cemented carbide may be, for example, WC-Co, WC-TiC-Co or WC-TiC-TaC-Co. WC, TiC and TaC are hard particles. On the other hand, Co is a bonding phase. Note that cermet is a sintered composite material in which a metal is combined with a ceramic component. Specific examples of cermets include, for example, titanium compounds containing TiC and/or TiN as main components.

The surface of the chip 40 can be coated with a film by, for example, a chemical vapor deposition method, a physical vapor deposition method, or the like. The coating may contain, for example, TiC, TiN, TiCN, Al ₂ O ₃ and the like as components.

The tip 40 may have a blade portion 41 capable of cutting the object Ob at least in part. The blade portion 41 may face the outside of the holder 50 from the first end 50a side.

(About the blade part that makes up the tip)
The blade portion 41 may have a rake surface 41a, a flank surface 41b, and a cutting edge 41c. The rake surface 41a may constitute the upper surface of the blade portion 41. The flank surface 41b may intersect with the rake surface 41a and constitute a side surface of the blade portion 41. The cutting edge 41c may be located at the boundary between the rake face 41a and the flank face 41b.

The rake face 41a may be a part through which chips flow when cutting the object Ob. The rake face 41a can have grooves and/or protrusions. When the rake face 41a has grooves and/or protrusions, the chips of the cut object Ob are likely to be divided into predetermined lengths. This makes it difficult for chips generated from the object Ob to become long. As a result, chips are less likely to get entangled with the cutting tool 30 or the object Ob. The angle of the flank surface 41b with the rake surface 41a may be set appropriately so that the tip 40 does not contact the object Ob more than necessary.

The cutting edge 41c may be located on a ridgeline that forms the boundary between the rake surface 41a and the flank surface 41b, and may be connected to the rake surface 41a and the flank surface 41b. The cutting blade 41c may be a portion that bites into the object Ob and directly contributes to cutting the object Ob when cutting the object Ob. The cutting edge 41c may (or may not) microscopically include a curved surface.

The chip 40 may have, for example, a through hole 42 that opens on the top and bottom surfaces of the chip 40. The tip portion of the clamp 31 may be inserted into the through hole 42 from above to below. The clamp 31 may urge the chip 40 fitted into the notch 66a downward. Thereby, the chip 40 may be sandwiched between the bottom surface of the notch 66a and the clamp 31, and fixed to the holder 50 (fixing section 66 to be described later). The clamp 31 may be fixed, for example, by a screw 32 screwed into the holder 50.

(holder)
The holder 50 may have a length ranging from, for example, a distal end 50a (first end 50a) to a rear end 50b (hereinafter also referred to as a second end 50b). The holder 50 may have a rod shape, for example. The length of the holder 50 can be set arbitrarily. For example, the length of the holder 50 may be set in a range of 50 mm to 200 mm.

The size of the holder 50 can be set arbitrarily. For example, the width (length in the horizontal direction) and thickness (length in the vertical direction) of the holder 50 may be 10 mm or more, 19 mm or more, 25 mm or more, or 50 mm or more. The width and thickness of the holders 50 may be the same or different. The thickness of the holder 50 may be constant regardless of the position in the length direction, or may increase toward the tip 50a.

See FIG. 4. The holder 50 may include, for example, a base 60 that occupies most of the holder 50, a sensor 51 housed inside the base 60, and a wiring 54 electrically connected to the sensor 51.

(About the base that constitutes the holder)
The base body 60 may be a member obtained by removing the sensor 51 and the wiring 54 from the holder 50. The material of the base body 60 can be set arbitrarily. For example, the material of the base body 60 can be steel, cast iron, or the like. From the viewpoint of increasing the flexibility of the base body 60, the material of the base body 60 may be cast iron. The description of the size and shape of the base body 60 will be omitted since there are many parts that overlap with the description of the size and shape of the holder 50. The tip (front end) of the base body 60 may constitute the first end 50a. The rear end (rear end) of the base body 60 may constitute the second end 50b.

See FIG. 3. The base body 60 may have, for example, a first lateral side surface 61, a second lateral side surface 62, a first reference surface 63, and a second reference surface 64. The first lateral side surface 61 may face the side facing the flank surface 41b of the chip 40. The second lateral side 62 may be located on the opposite side of the first lateral side 61. The first reference surface 63 connects the first lateral side surface 61 and the second lateral side surface 62 and may face the side facing the rake surface 41a of the chip 40. The second reference surface 64 may be located on the opposite side of the first reference surface 63.

The base body 60 may further have a first end surface (front end surface) and a second end surface (rear end surface). The first end surface may be located at the first end (tip) 50a of the base body 60. Hereinafter, the first end surface may be indicated by the reference numeral 50a. The second end surface may be located at the second end (tip) 50b of the base body 60. Hereinafter, the second end surface may be indicated by the reference numeral 50b. The first lateral surface 61, the second lateral surface 62, the first reference surface 63, and the second reference surface 64 may each extend from the first end 50a toward the second end 50b. At this time, the first lateral side surface 61, the second lateral side surface 62, the first reference surface 63, and the second reference surface 64 may be connected to the first end surface 50a and the second end surface 50b, respectively.

Since the first lateral side surface 61, the second lateral side surface 62, the first end surface 50a, and the second end surface 50b are located between the first reference surface 63 and the second reference surface 64, respectively, these surfaces are used as the first reference surface. It may be regarded as a side surface relative to the surface 63 and the second reference surface 64. That is, the base body 60 may be considered to have a first lateral side surface 61, a second lateral side surface 62, a first end surface 50a, and a second end surface 50b as side surfaces.

The first lateral side surface 61 may constitute the right side surface of the base body 60. The first lateral side surface 61 may face the side facing the flank surface 41b. At this time, the direction in which the first lateral side surface 61 faces does not need to coincide with the direction in which the flank surface 41b faces, and as long as it faces in the direction closest to the direction in which the flank surface 41b faces among the side surfaces constituting the base body 60. good.

The second lateral side surface 62 may constitute the left side surface of the base body 60. The second lateral side 62 may face the side abutting portion 21 of the tool post 20. At this time, the second lateral side surface 62 may be separated from the side surface abutting section 21 or may be in contact with the side surface abutting section 21 . When the second lateral side surface 62 contacts the side surface contact portion 21, the position of the base body 60 relative to the tool rest 20 is easily stabilized.

The first reference surface 63 may constitute the upper surface of the base body 60. The first reference surface 63 may face the side facing the rake surface 41a. At this time, the direction in which the first reference surface 63 faces does not need to coincide with the direction in which the rake surface 41a faces, but as long as it faces in the direction closest to the direction in which the rake surface 41a faces among the surfaces constituting the base body 60. good. The first reference surface 63 may face the second protrusion 23 of the tool post 20. Further, the first reference surface 63 may have a first region 63a that can come into contact with the tool rest 20. In the example shown in FIG. 6, the biasing portion 25 of the tool rest 20 comes into contact with the first region 63a. The contact surface 25a of the biasing portion 25 contacts the base 60 in the first region 63a, and a force that biases the cutting tool 30 toward the first protrusion 22 is applied from the contact surface 25a to the first region 63a. This allows the base body 60 to be held on the tool post 20.

The second reference surface 64 may constitute the lower surface of the base 60, as in the example shown in FIG. The second reference surface 64 may face the first protrusion 22 of the tool post 20 and may come into contact with the mounting surface 22 a of the first protrusion 22 . At this time, the entire second reference surface 64 may be in contact with the placement surface 22a, or a portion of the second reference surface 64 may be in contact with the placement surface 22a.

See FIG. 4. The base body 60 may include, for example, a shank portion 70 and a fixing portion 66. The shank portion 70 may be biased by the tool rest 20 (see FIG. 1). The fixing part 66 may be located at the tip (front end) of the shank part 70. The shank portion 70 and the fixing portion 66 may be formed separately from each other, or may be continuous and integrated with each other.

(About the shank part that makes up the base)
See FIG. 3. The shank portion 70 may have a rectangular shape in a cross section perpendicular to a straight line L1 (see FIG. 4) extending in the front-rear direction, for example. In other embodiments, the shank portion 70 may have a trapezoidal cross-sectional shape or a circular cross-sectional shape.

See FIG. 4. The shank portion 70 includes, for example, a recess 80 that opens on the outer surface (side surface) of the shank portion 70 and accommodates the sensor 51 therein, and a passage 72 that opens on the bottom surface of the recess 80 and goes toward the rear end of the base body 60. may have.

The recess 80 may be opened at the first reference surface 63 or the second reference surface 64 of the base body 60 (shank portion 70), or may be opened at the side surface. When the recess 80 opens on the side surface of the base 60, the base 60 can be stably held by the tool post 20. This is because the surface of the first reference surface 63 or the second reference surface 64 that comes into contact with the tool rest 20 is likely to be wide. When the recess 80 opens on the side surface of the base 60 , the recess 80 may be spaced apart from the first reference surface 63 and the second reference surface 64 . In this case, a wide surface of the first reference surface 63 or the second reference surface 64 that comes into contact with the tool rest 20 can be secured.

(About the recess made in the shank)
The recess 80 may be open to the first lateral side 61 and have a certain depth toward the second lateral side 62, for example. The recess 80 may be opened from the first lateral side 61 to the second lateral side 62. The depth of the recessed portion 80 is, for example, 1/2 or less of the thickness of the shank portion 70 from the first lateral side surface 61 to the second lateral side surface 62 (thickness of the shank portion 70 in the depth direction of the recessed portion 80). , 1/3 or less, 1/4 or less, or 1/5 or less.

As in the example shown in FIG. 4 , the recess 80 may have a rectangular shape when viewed from the side of the first lateral side 61 . However, in other embodiments, the recess 80 may have an elliptical shape, a circular shape, or a trapezoidal shape when viewed from the side from the first lateral side surface 61. .

For example, the central portion of the recess 80 (the central portion in the front-rear direction or the geometric center of the recess 80) is located closer to the distal end of the shank portion 70 (tip 40 side) than the intermediate position between the rear end 50b and the distal end of the shank portion 70. May be located. That is, the recess 80 may be located closer to the tip side between the rear end 50b and the tip of the shank portion 70. Note that if the tip of the shank portion 70 (the boundary between the shank portion 70 and the fixed portion 66) is ambiguous, the rear portion of the tip 40 may be referred to as the tip of the shank portion 70. The entire recessed portion 80 may be located on the distal end side of the shank portion 70 with respect to the intermediate position between the rear end 50b and the distal end of the shank portion 70, or only a portion thereof may be located on the distal end side.

Please refer to FIGS. 4 and 6. FIG. 6 shows the cutting tool 30 held on the tool post 20. For example, the center portion of the recess 80 (the center portion in the vertical direction or the geometric center of the recess 80) is located closer to the second reference surface 64 than the intermediate position from the first reference surface 63 to the second reference surface 64. (It does not have to be located.) That is, the recess 80 may be located closer to the second reference surface 64 between the first reference surface 63 and the second reference surface 64. From another perspective, when the distance from the first reference surface 63 to the recess 80 is A1, and the distance from the second reference surface 64 to the recess 80 is A2, the relationship A1>A2 may be established. . That is, the distance A1 from the recess 80 to the first reference surface 63 may be longer than the distance A2 from the recess 80 to the second reference surface 64.

The shape of the recess 80 formed in the shank portion 70 may vary. For example, the recess 80 may or may not have a step shape toward the bottom of the recess 80 . As in the example shown in FIG. 4, the recess 80 has an inner wall 82 extending from the first lateral side 61 toward the second lateral side 62, and a bottom 83 connected to the inner wall 82 and forming the bottom of the recess 80. You may do so.

The inner wall 82 may be a plane perpendicular to the first lateral side 61. In other embodiments, the angle between the first lateral side surface 61 and the inner wall 82 may be 90 degrees or less. The bottom portion 83 may be a surface parallel to the first lateral side surface 61 . In other embodiments, the bottom portion 83 may be inclined at a predetermined angle with respect to the first lateral side surface 61.

For example, the boundary between the recess 80 and the bottom 83 may be curved (or not necessarily curved). That is, in the recess 80, the boundary between the inner wall 82 and the bottom 83 may be a curved surface. The depth of the recess 80 is greater than the thickness of the sensor 51. That is, the thickness of the sensor 51 is smaller than the length of the inner wall 82 in the depth direction of the recess 80.

(About the passage in the shank)
As in the example shown in FIG. 4, the passage 72 may be a through hole that opens at the bottom 83 of the recess 80 and the rear end 50b (rear end surface) of the shank portion 70, respectively. Also refer to FIG. 3. The passage 72 may have, for example, a circular, elliptical, or rectangular shape in a cross section of the cutting tool 30 perpendicular to the direction in which the passage 72 extends. A wiring 54 that connects the sensor 51 and external equipment in a energized manner may pass through the passage 72 . The external device mentioned above may be, for example, the information processing device 12 or a device that inputs information including the physical quantity detected by the sensor 51 to the information processing device 12. Furthermore, the external equipment may be simply an extension of the wiring 54.

See FIG. 5. In the enlarged shank portion shown in FIG. 5, the inner side of the region extending from the opening of the recess along the depth direction of the recess is shown by solid hatching, and the outside of this region is shown by broken line hatching. The region Te (hereinafter simply referred to as region Te) extending from the opening 81 of the recess 80 along the depth direction of the recess 80 has a length in the left-right direction extending from the first lateral side surface 61 of the shank portion 70 to the region Te. The thickness up to the second lateral side surface 62 may be the same. Further, the length of the region Te in the front-rear direction may be the same as the width of the recess 80 in the front-rear direction. Also refer to FIG. 3. Furthermore, the length of the region Te in the vertical direction may be the same as the width of the recess 80 in the vertical direction.

As in the example shown in FIG. 5, the recess 80 may be located inside the region Te, and a portion of the passage 72 may pass therethrough. The portion inside the region Te except for a portion of the recess 80 and the passage 72 may be filled with a material (such as steel or cast iron as described above) forming the shank portion 70 (base body 60). That is, the portions within the region Te except for the recess 80 and a portion of the passage 72 may be solid.

In the region Te within the shank portion 70, the volume of the solid portion of the shank portion 70 may be larger (or not necessarily larger) than the volume of the recessed portion 80, for example. When the volume of the solid portion of the shank portion 70 is V1 and the volume of the recessed portion 80 is V2, the relationship V1>V2 may be established. The volume of the solid portion of the shank portion 70 is, for example, 1.1 times or more, 1.5 times or more, 2 times or more, 4 times or more, or 8 times or more larger than the volume of the recess 80. It's fine. Note that the volume of the solid portion of the shank portion 70 within the region Te may be larger than the sum of the volume of the recess 80 and the volume of the passage 72 within the region Te. The volume of the solid portion of the shank portion 70 within the region Te is, for example, 1.1 times or more, as described above, with respect to the sum of the volume of the recess 80 and the volume of the passage 72 within the region Te. The size may be 1.5 times or more, 2 times or more, 4 times or more, or 8 times or more. Here, the volume of the recess 80 referred to above means, for example, even when a member such as the sensor 51 (including bonding material, other resin materials, etc.) is located within the recess 80, focusing only on the recess 80, This refers to the volume of the recess 80 when components such as the sensor 51 are removed. In other words, the size of the volume of the recess 80 does not change depending on the members such as the sensor 51 disposed within the recess 80 .

See FIG. 6. On the straight line L2 extending vertically through the biasing portion 25, the inside of the shank portion 70 may be filled (or not necessarily filled) with the material forming the shank portion 70, for example. From another viewpoint, the recessed portion 80 may be located away from the straight line L2 that extends in the up-down direction (biasing direction) through the center of the region of the shank portion 70 that is biased by the biasing portion 25 . Also refer to FIG. 2(b). When the tool rest 20 has a plurality of biasing parts 25, 25, 25, the recessed part 80, for example, has a straight line L2, L2, L2 extending from the plurality of biasing parts 25, 25, 25 (in FIG. , only one straight line L2 is shown).

In other words, when looking through the plane from the first reference surface 63 toward the second reference surface 64, at least a portion of the contact surface 25a or the first region 63a may be separated from the recess 80. In a portion of the contact surface 25a or the first region 63a that is remote from the recess 80, the inside of the shank portion 70 is filled with the material forming the shank portion 70. Therefore, even if a force that urges the cutting tool 30 toward the first protruding portion 22 is applied from the contact surface 25a to the first region 63a, this urging force is applied to the portion of the shank portion 70 that is filled with the material. easily accepted by Therefore, the durability of the base body 60 is high.

When viewed through the plane from the first reference surface 63 toward the second reference surface 64, whether at least a portion of the contact surface 25a or the first region 63a is separated from the recess 80 can be determined by the cross section of the shank portion 70. It is possible to evaluate. For example, in a cross section perpendicular to the longitudinal direction of the shank portion 70 as shown in FIG. (downward) and may be evaluated based on whether or not it intersects the recess 80. Alternatively, evaluation may be performed on a cross section along the longitudinal direction of the shank portion 70, as shown in FIG. 4, for example. In such a cross section, by projecting the contact surface 25a or the first region 63a in the direction from the first reference surface 63 toward the second reference surface 64, at least a portion of the contact surface 25a or the first region 63a It may be evaluated whether it is far from the recess 80 or not.

In the case where there are a plurality of contact surfaces 25a as described above, the durability of the base body 60 is improved if at least one of the plurality of contact surfaces 25a is partially separated from the recess 80. However, when there are a plurality of contact surfaces 25a, if a portion of each of the plurality of contact surfaces 25a is separated from the recess 80, the durability of the base body 60 is further improved.

When seen from the first reference surface 63 toward the second reference surface 64 in a plan view, more than half of the contact surface 25a or the first region 63a may be separated from the recess 80. In this case, even if a force is applied to urge the cutting tool 30 toward the first protrusion 22, this urging force is likely to be stably received by the portion of the shank portion 70 filled with material.

When viewed through the plane from the first reference surface 63 toward the second reference surface 64, the entire contact surface 25a or the first region 63a may be separated from the recess 80. In this case, even if a force is applied that urges the cutting tool 30 toward the first protrusion 22, this urging force is unlikely to be transmitted to the recess 80. Moreover, the above-mentioned urging force is easily received by the portion of the shank portion 70 that is filled with the material constituting the shank portion 70. Therefore, the durability of the base body 60 is even higher.

(About the sensors that make up the holder)
Please refer to FIGS. 3 and 4. The sensor 51 is, for example, a device that can detect the state of the cutting tool 30 during cutting. Examples of the state of the cutting tool 30 detected by the sensor 51 include physical quantities such as temperature, acceleration, vibration, strain, and internal stress in the cutting tool 30 during cutting, and physical quantities such as wear and tear in the cutting tool 30. . Detecting the state means detecting at least one of the above-mentioned physical quantities in the cutting tool 30. Note that the object of detection is not limited to a physical quantity in a static state in which the state does not change relatively, but also includes, for example, a dynamic physical quantity in which the state changes. The static state and dynamic state will be explained in more detail below.

When the physical quantity detected by the sensor 51 is the temperature of the cutting tool 30 (substrate 60), for example, by cutting the object Ob (see FIG. 1), the temperature of the substrate 60, which was 20° C. before cutting, can be changed. Suppose that the temperature rises to 80°C during cutting. At this time, the temperature of the base 60 of 20°C before cutting corresponds to a static physical quantity, and the amount of change in temperature of the base 60 from 20°C to 80°C due to cutting corresponds to a dynamic physical quantity. The sensor 51 may detect these static physical quantities and dynamic physical quantities, for example. Note that the information regarding the cutting tool 30 detected by the sensor 51 is not limited to the above-mentioned temperature, acceleration, vibration, internal stress, and wear.

In one aspect, sensor 51 may include a thermocouple. At this time, the sensor 51 can detect, for example, a physical quantity related to the temperature of the gas. In one aspect, sensor 51 may include, for example, a piezoelectric sensor having a piezo element. At this time, the sensor 51 can detect, for example, physical quantities related to acceleration, vibration, strain, internal stress, etc. in the base body 60. Note that the sensor 51 referred to in the present disclosure may be, for example, a simple wiring circuit. When the sensor 51 is a simple wiring circuit, the detection target of the sensor 51 is, for example, the degree of wear of the cutting tool 30. More specifically, information regarding the state of the cutting tool 30 can be obtained by knowing the resistance value that changes depending on the degree of wear of the wiring circuit (sensor 51).

There are various types of sensors 51. The sensor 51 may be any sensor as long as it can detect the above-mentioned physical quantity, and is not limited to the above-mentioned thermocouple, piezoelectric sensor, wiring circuit, etc. As one example of the sensor 51 other than the above, for example, a MEMS (Micro Electro Mechanical Systems) sensor can be cited. The sensor 51 may be composed only of a transducer that converts a physical quantity into an electrical signal (it may be a sensor in a narrow sense). Further, the sensor 51 may include an amplifier or the like in addition to the transducer. The physical quantity detected by the sensor 51 may be input to an external device (for example, the information processing device 12 or a device capable of inputting information to the information processing device 12) via the wiring 54, for example.

See FIG. 3. The shape of the sensor 51 can be set arbitrarily. The sensor 51 may have a flat plate shape, for example. The sensor 51 having a flat plate shape may have a rectangular shape when viewed from the side of the first lateral side 61 . However, in other embodiments, the sensor 51 having a flat plate shape may have a circular shape, an elliptical shape, or a trapezoidal shape, for example, when viewed from the side from the first lateral side surface 61. The sensor 51 is not limited to a flat plate shape, and may have a rod shape, for example. The thickness of the sensor 51 can be set arbitrarily. The thickness of the sensor 51 may be, for example, 1 mm or more, or 2 mm or more.

Please refer to FIGS. 3 and 4. For example, the sensor 51 may have its central portion (the central portion in the front-rear direction) located on the front side of the intermediate position of the shank portion 70 (the intermediate position in the front-rear direction). Thereby, for example, the sensor 51 can more easily detect a physical quantity related to the state of the cutting tool 30 than in a mode in which the sensor 51 is disposed on the rear side of the shank portion 70 (this mode is also included in the technology according to the present disclosure).

See FIG. 5. The sensor 51 may be bonded to the base 60 using a bonding material Bo, for example. The bonding material Bo may be an adhesive made of an organic material or an inorganic material. The bonding material Bo may or may not have conductivity.

(About the wiring that makes up the holder)
As in the example shown in FIG. 4, a portion of the wiring 54 may be located within the passage 72 of the shank portion 70, and the remaining portion may be located outside the shank portion 70. One end of the wiring 54 located within the passage 72 of the shank portion 70 may be connected to the sensor 51. The other end of the wiring 54 is located outside the passage 72 and may be connected to external equipment. By connecting the wiring 54 connected to the sensor 51 to an external device, information including the physical quantity detected by the sensor 51 can be input to the information processing device 12.

(Information processing device)
Please refer to FIGS. 1 and 4. For example, the physical quantity detected by the sensor 51 may be input to the information processing device 12 via the wiring 54 connected to the sensor 51. The information processing device 12 may be installed, for example, in the machine tool Mt, in a space around the machine tool Mt, or in a location away from the machine tool Mt. The information processing device 12 may include, for example, a computer. A computer may include a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and an external storage device. The information processing unit 12a can perform various functions by executing programs recorded in the ROM and/or external storage device by the CPU.

See FIG. 7. The information processing device 12 may include, for example, an information processing section 12a, a storage section 12b, and an adjustment section 12c. The information processing unit 12a may be a part that processes information on the physical quantity detected by the sensor 51. The storage unit 12b may be a part that stores information processed by the information processing unit 12a. The adjustment section 12c may be a part that adjusts the control of the machine tool Mt based on the information processed by the information processing section 12a.

The information processing section 12a may perform a process of accumulating information on the physical quantity detected by the sensor 51 in the storage section 12b, for example. The information accumulated by the information processing unit 12a may be information on the physical quantity detected by the sensor 51 as it is, or information different from the information on the physical quantity detected by the sensor 51 (for example, information on the physical quantity detected by the sensor 51). A program may be executed based on the information, and the information may be information obtained by executing the program.

The adjustment unit 12c may adjust the values of parameters of the program within the machine tool Mt, for example, based on information stored in the storage unit 12b. In one aspect, the adjustment unit 12c may change the rotation speed of the object Ob (see FIG. 1) by adjusting the values of parameters in the program. In one embodiment, the adjustment unit 12c may change the moving speed of the cutting tool 30 that moves in the front, rear, left, right, and up and down directions by adjusting the values of parameters in the program. Further, the adjustment unit 12c may adjust, for example, the time until cutting completion displayed on a display (not shown).

One information processing device 12 may be connected to a plurality of machine tools Mt. In this case, one information processing unit 12a may process information on physical quantities detected by the plurality of sensors 51. One storage unit 12b may store information on physical quantities detected by the plurality of sensors 51. Furthermore, one adjustment unit 12c may adjust programs in a plurality of machine tools Mt based on information on physical quantities detected by a plurality of sensors 51. One information processing device 12 may collect big data obtained from a plurality of machine tools Mt, for example.

See FIG. 5. In a region Te within the shank portion 70 extending from the opening 81 of the recess 80 along the depth direction of the recess 80 , the volume of the solid portion of the shank portion 70 may be larger than the volume of the recess 80 . In the region Te, when the volume of the solid portion of the shank portion 70 is larger than the volume of the recessed portion 80, the strength of the shank portion 70 is high. As a result, the durability of the cutting tool 30 is improved.

Also refer to FIG. 3. When the sensor 51 is located within the recess 80, chips and the like generated by cutting are less likely to come into contact with the sensor 51.

Please refer to FIGS. 3 and 5. The recess 80 may open on the side surface of the shank portion 70. Further, the depth of the recess 80 may be equal to or less than 1/2 the thickness of the shank portion 70 in the depth direction of the recess 80. In this case, more than half of the thickness of the shank portion 70 in the depth direction of the recess 80 is a solid portion around the area where the recess 80 is opened. As a result, when the cutting tool 30 is held by the machine tool Mt, the machine tool Mt can bias the central portion of the cutting tool 30. That is, by making the central position of the cutting tool 30 solid, the durability of the cutting tool 30 having the recess 80 is further improved.

The recess 80 is open to the first lateral side 61 and may be opened toward the second lateral side 62 . In this case, for example, when a machine tool Mt that biases and holds the first reference surface 63 of the shank portion 70 is used, the recess 80 may not be formed in the surface of the shank portion 70 that is not biased by the machine tool Mt. can.

See FIG. 6. In the direction from the first reference plane 63 to the second reference plane 64, the central portion of the recess 80 is located closer to the second reference plane 64 than the intermediate position between the first reference plane 63 and the second reference plane 64. It's fine. In this case, the distance A1 from the first reference surface 63 to the recess 80 is longer than the distance A2 from the second reference surface 64 to the recess 80 in the vicinity where the recess 80 is opened. In other words, the wall thickness near the part that contacts the machine tool Mt can be increased. Thereby, durability against the urging force of the machine tool Mt can be improved.

See FIG. 5. The boundaries of the recess 80 and the bottom 83 may be curved. In this case, when the cutting tool 30 is held by the machine tool Mt, it is possible to prevent excessive load from being applied to the boundary between the recess 80 and the bottom 83.

In the direction from the rear end 50b of the shank portion 70 to the tip of the shank portion 70, the central portion of the recess 80 is located closer to the tip of the shank portion 70 than the intermediate position between the rear end 50b and the tip of the shank portion 70. It's fine. Thereby, the sensor 51 can be located on the chip 40 side.

The recess 80 may be located away from the straight line L2 extending from the center of the portion of the shank portion 70 that is biased by the biasing portion 25 in the direction in which the biasing portion 25 is biased. In this case, the shank portion 70 biased by the biasing portion 25 can have a solid portion extending from the biased region (front surface) to the back side thereof. As a result, the durability of the cutting structure 11 can be improved.

The data collection system 10 may include the above-mentioned cutting tool 30 and a storage unit 12b that stores information including the physical quantities detected by the sensor 51. In this case, the data collection system 10 can store the physical quantity detected by the sensor 51 in the storage unit 12b.

[Second embodiment]
FIG. 8(a) shows a cross-sectional view of a cutting tool 30A in the second embodiment. FIG. 8(b) shows an enlarged view of region VIIIb shown in FIG. 8(a). 8(a) corresponds to FIG. 4, and FIG. 8(b) corresponds to FIG. 5. The cutting tool 30A in the second embodiment is different from the cutting tool 30 in the first embodiment in the position where the recess 80A is opened. Other basic structures are the same as those of the cutting tool 30 in the first embodiment. For parts common to the first embodiment, reference numerals are used and detailed explanations are omitted.

(concavity)
Refer to FIG. 1 and FIG. 8(a). The recess 80A may be open to the second lateral side 62 and have a certain depth toward the first lateral side 61. The center portion (the center portion in the front-rear direction) of the recess 80A may be located closer to the rear end of the shank portion 70A (away from the tip 40) than the intermediate position between the rear end 50b and the tip of the shank portion 70A. Thereby, when the cutting tool 30A is attached to the machine tool Mt, the recess 80A (second lateral side surface 62) can be located on the machine tool Mt side (the side away from the object Ob).

(region)
In FIG. 8(b), the shank portion 70A is illustrated in an enlarged manner, and the inside of the region Te extending from the opening of the recess 80A along the depth direction of the recess 80A is shown by a solid line, and the outside of this region Te is shown by a solid line. is indicated by a dashed line. The volume of the solid portion of the shank portion 70A within the region Te may be larger than the volume of the recessed portion 80A within the region Te. That is, when the volume of the solid portion of the shank portion 70A is V3 and the volume of the recessed portion 80A is V4, the relationship V3>V4 may be established. Further explanation regarding the region Te will be omitted since there are many parts common to the first embodiment.

Refer to FIG. 8(a). The recess 80A may be open to the second lateral side 62 and depressed toward the first lateral side 61. As a result, for example, when a machine tool Mt that holds the cutting tool 30A by biasing the upper surface 63 of the shank portion 70A is used, the recess 80A is located on the surface of the shank portion 70A that is not biased by the machine tool Mt. The durability of the portion 70A is high.

Also refer to FIG. By opening the recess 80A to the second lateral side surface 62, the sensor 51 is positioned on the machine tool Mt side during cutting. In this case, the sensor 51 is placed at a location away from the object Ob during cutting. As a result, chips and the like generated by cutting are prevented from coming into contact with the sensor 51.

Refer to FIG. 8(a). When viewed from the rear end 50b of the shank portion 70A toward the tip of the shank portion 70A, the center portion of the recess 80A is located closer to the rear end 50b of the shank portion 70A than the intermediate position between the rear end 50b and the tip of the shank portion 70A. May be located. By locating the recessed portion 80A on the rear end 50b side of the shank portion 70A, the sensor 51 can be positioned away from the chip 40.

[Third embodiment]
FIG. 9(a) shows a cross-sectional view of a cutting tool 30B in the third embodiment. FIG. 9(b) shows an enlarged view of region IXb shown in FIG. 9(a). 9(a) corresponds to FIG. 4, and FIG. 9(b) corresponds to FIG. 5. The cutting tool 30B in the third embodiment is different from the cutting tool 30 in the first embodiment in the position where the recess 80B is opened. As for the parts common to the first embodiment, the same reference numerals are used and detailed explanations are omitted.

(concavity)
The recessed portion 80B may be opened, for example, at the rear end surface (rear end 50b) of the shank portion 70B. In this case, it can be said that the recessed portion 80B is closer to the rear end 50b side of the shank portion 70B between the rear end 50b and the tip of the shank portion 70B. Furthermore, the recess 80B may have a certain depth toward the chip 40 side (first end 50a side). The depth of the recess 80B is, for example, 1/2 or less, 1/3 or less, 1/4 or less, 1/5 or less of the length of the shank portion 70B in the depth direction (front-back direction) of the shank portion 70B. Alternatively, the size may be 1/10 or less.

Also refer to FIG. The recess 80B may be formed at a location away from the chip 40 (at the rear end 50b of the shank portion 70B). That is, in a state where the cutting tool 30B is attached to the machine tool Mt, the sensor 51 may be located away from the object Ob.

(region)
In FIG. 9(b), the shank portion 70B is shown enlarged, and the inside of the region Te extending from the opening of the recess 80B along the depth direction of the recess 80B is shown by a solid line, and the outside of this region Te is shown by a broken line. shown. The region Te may have a length ranging from the rear end 50b of the shank portion 70B to the tip of the shank portion 70B (the boundary between the shank portion 70B and the fixing portion 66) in the front-rear direction. The region Te may have the same length in the left-right direction as the width of the recess 80B in the left-right direction. The region Te may have the same length in the vertical direction as the width of the recess 80B in the vertical direction. The volume of the solid portion of the shank portion 70B within the region Te may be larger than the volume of the recess 80B within the region Te. That is, when the volume of the solid portion of the shank portion 70B is V5 and the volume of the recessed portion 80B is V6, the relationship V5>V6 may be established.

The volume of the solid portion of the shank portion 70B is, for example, 1.1 times or more, 1.5 times or more, 2 times or more, 4 times or more, 8 times or more, or 16 times or more the volume of the recess 80B. It may be considered the size.

Refer to FIG. 9(a). The recessed portion 80B may be opened at the rear end 50b (rear end surface) of the shank portion 70B. Further, the depth of the recess 80B may be equal to or less than 1/2 the length of the shank portion 70B in the depth direction of the recess 80B. In this case, for example, when a machine tool Mt that holds the cutting tool 30B by biasing the upper surface 63 of the shank portion 70B is used, the recess 80B is located on the surface of the shank portion 70B that is not biased by the machine tool Mt. The durability of the shank portion 70B is high.

Also refer to FIG. The recess 80B may open at the rear end 50b of the shank portion 70B. In this case, the sensor 51 located in the recess 80B is placed at a location away from the object Ob. As a result, it is possible to reduce the possibility that chips and the like generated by cutting come into contact with the sensor 51.

[Fourth embodiment]
FIG. 10(a) shows a cross-sectional view of a cutting tool 30C in the fourth embodiment. FIG. 10(b) shows an enlarged view of region Xb shown in FIG. 10(a). 10(a) corresponds to FIG. 4, and FIG. 10(b) corresponds to FIG. 5. The cutting tool 30C in the fourth embodiment is different from the cutting tool 30 in the first embodiment in that a wireless communication part 52C connected to the sensor 51 is located in the recess 80C, and a resin part 55C is located in the recess 80C. The main difference is that they are satisfied. As for the parts common to the first embodiment, the same reference numerals are used and detailed explanations are omitted.

(holder)
The holder 50C may include, for example, a base 60C having a recess 80C, a sensor 51, a wireless communication section 52C, a wiring 54C, and a resin section 55C. The wireless communication unit 52C may be housed together with the sensor 51 in the recess 80C of the base 60C. The wiring 54C may connect the sensor 51 and the wireless communication unit 52C in a energized manner. The resin part 55C may seal the sensor 51, the wireless communication part 52C, and the wiring 54C.

(concavity)
For example, the recess 80C may be opened in a half or more of the first lateral side 61. However, in other embodiments, the portion of the first lateral side surface 61 where the recessed portion 80C opens may be less than half of the entire portion. The size of the recess 80C can be appropriately set depending on the size of the sensor 51 and the wireless communication section 52C housed therein. The entire recess 80C may be (or may not be) filled with the resin portion 55C.

(Wireless communication section and wiring)
Also refer to FIG. The wireless communication unit 52C may be, for example, a device that can input (transmit) information including the physical quantity measured by the sensor 51 to an external device (for example, the information processing device 12). Information including the physical quantity measured by the sensor 51 may be input to the wireless communication unit 52C via the wiring 54, and may be input to the information processing device 12 from the wireless communication unit 52C. Note that the wireless communication unit 52C is not an essential component of the cutting tool 30C, so it may be omitted if necessary. When the wireless communication section 52C is eliminated, the sensor 51 may be connected to an external device via the wiring 54C. For example, the wiring 54C may be located in the recess 80C together with the sensor 51 and the wireless communication section 52C, and may be sealed by the resin section 55C.

(Resin part)
The material of the resin portion 55C may be, for example, acrylic resin. As in the example shown in FIG. 10(a), the entire resin portion 55C may be located within the recess 80C. In other words, the resin portion 55C does not need to have a portion located outward from the first lateral side surface 61. In the embodiment shown in FIG. 10(a), when all of the resin portion 55C is located within the recess 80C, when cutting the object Ob (see FIG. 1), the resin portion 55C is placed in the object Ob more than necessary. You can prevent them from getting close. However, in other embodiments, a portion of the resin portion 55C may be located outside the recess 80C.

(region)
As in the first to third embodiments, the shank portion 70C is shown in an enlarged manner in FIG. The outside of this region Te is shown by a broken line. The volume of the solid portion of the shank portion 70C within the region Te may be larger than the volume of the recessed portion 80C within the region Te. That is, when the volume of the solid portion of the shank portion 70 is V7 and the volume of the recessed portion 80C is V8, the relationship V7>V8 may be established. Note that the volume of the recess 80C refers to the volume focused only on the recess 80C, with the sensor 51, the wireless communication section 52C, the wiring 54C, and the resin section 55C removed. Description regarding the region Te will be omitted since it has many parts in common with the embodiments described so far.

Refer to FIG. 10(a). The inside of the recess 80C may be filled with a resin part that seals the sensor 51. In this case, the sensor 51 is prevented from being exposed to the outside of the base 60C. As a result, the sensor 51 can be prevented from being exposed to chips generated during cutting, oil used during cutting, and the like. Thereby, the durability of the cutting tool 30C can be further improved.

[Fifth embodiment]
FIG. 11(a) shows a cross-sectional view of a cutting tool 30D in the fifth embodiment. FIG. 11(b) shows an enlarged view of region XIb shown in FIG. 11(a). 11(a) corresponds to FIG. 4, and FIG. 11(b) corresponds to FIG. 5. The cutting tool 30D in the fifth embodiment is different from the cutting tool 30 in the first embodiment in that a wireless communication unit 52D connected to the sensor 51 is located in the recess 80D, and a cover 56D covers the recess 80D. The main difference is that As for the parts common to the first embodiment, the same reference numerals are used and detailed explanations are omitted.

(holder)
The holder 50D may include, for example, a base 60D having a recess 80D, a sensor 51, a wireless communication section 52D, a wiring 54D, and a cover 56D. The wireless communication unit 52D may be housed together with the sensor 51 in the recess 80D of the base 60D. The wiring 54D may connect the sensor 51 and the wireless communication unit 52D in a energized manner. The cover 56D may be placed over the recess 80D to cover the sensor 51 and the wireless communication section 52D.

(concavity)
The recess 80D may include, for example, a first recess 82D and a second recess 83D. The first recess 82D may be open to the first lateral side 61 and open toward the second lateral side 62, and may have a bottom. The second recess 83D opens at the bottom of the first recess 82D, opens toward the second lateral side surface 62, and may include the bottom 83Db of the recess 80D. In the direction from the first lateral side 61 to the second lateral side 62, the first recess 82D and the second recess 83D may be located in this order.

A cover 56D may be located within the first recess 82D. The cover 56D may seal the sensor 51, the wireless communication section 52D, and the wiring 54D. The sensor 51, the wireless communication unit 52D, and the wiring 54D may be located in the second recess 83D.

The first recess 82D has a first inner wall 82Da extending from the first lateral side 61 to the second lateral side 62, and a first bottom 82Db connected to the first inner wall 82Da and forming the bottom of the first recess 82D. You may do so. The second recess 83D includes a second inner wall 83Da extending from the first bottom 82Db toward the second lateral side 62, and a second bottom 83Db connected to the second inner wall 83Da and forming the bottom of the second recess 83D. It's fine. The first bottom portion 82Db and the second inner wall 83Da may be continuously connected.

The length of the first inner wall 82Da in the depth direction of the recess 80D may be longer than the thickness of the cover 56D. If the length of the first inner wall 82Da (in the depth direction of the recess 80D) is longer than the thickness of the cover 56D, the cover 56D may be cut into the object Ob more than necessary when cutting the object Ob (see FIG. 1). You can prevent them from getting close. However, in other embodiments, the length of the first inner wall 82Da may be shorter than the thickness of the cover 56D. That is, a portion of the cover 56D may be exposed outside the recess 80D.

(Wireless communication section and wiring)
Also refer to FIG. The wireless communication unit 52D may be, for example, a device that can input (transmit) information on the physical quantity measured by the sensor 51 to an external device (for example, the information processing device 12). Information on the physical quantity measured by the sensor 51 may be input to the wireless communication unit 52D via the wiring 54, and may be input to the information processing device 12 via the wireless communication unit 52D. The wireless communication unit 52D may be fixed to the base 60D together with the sensor 51 using a bonding material. Note that the wireless communication unit 52D is not an essential component of the cutting tool 30D, so it may be omitted if necessary. When the wireless communication section 52D is eliminated, the sensor 51 may be connected to an external device via the wiring 54D.

(cover)
The shape of the cover 56D can be appropriately set according to the shape of the recess 80D when viewed from the side. For example, the cover 56D may be a flat plate having a rectangular shape, an elliptical shape, or a trapezoidal shape. Cover 56D may be fixed to base 60D with a bonding material. The bonding material for bonding the cover 56D may be the same as or different from the bonding material for bonding the sensor 51 and the wireless communication section 52D.

The material of the cover 56D is arbitrary. For example, the material of the cover 56D may be an organic material such as resin, an inorganic material such as glass, or a metal such as steel, cast iron, or stainless steel. The material of the cover 56D may be the same as the material of the base 60, or may be different.

The recess 80D may be closed by a cover 56D. In this case, exposure of the sensor 51 to the outside of the base body 60D is suppressed. As a result, the sensor 51 can be prevented from being exposed to chips generated during cutting, oil used during cutting, and the like. Thereby, the durability of the cutting tool 30D can be further improved.

(region)
As in the first to fourth embodiments, the shank portion 70D is shown in an enlarged view in FIG. The outside of this region Te is shown by a broken line. The volume of the solid portion of the shank portion 70D within the region Te may be larger than the volume of the recessed portion 80D within the region Te. That is, when the volume of the solid portion of the shank portion 70 is V9 and the volume of the recessed portion 80D is V10, the relationship V9>V10 may be established. Note that the volume of the recess 80D refers to the volume focused only on the recess 80D when the sensor 51, the wireless communication section 52D, the wiring 54D, and the cover 56D are removed. Further explanation regarding the region Te will be omitted since there are many parts common to the embodiments described so far.

Note that the cutting tool, cutting structure, information processing device, and holder in the present disclosure are not limited to the embodiments and modifications described above, and may be implemented in various forms. Hereinafter, some examples in which the shapes of the cutting tool, the cutting structure, the information processing device, and the holder are modified will be introduced.

For example, in the embodiment, a cutting tool related to a replaceable tip called a throw-away tip has been described. However, the cutting tool in the present disclosure may be, for example, a clamp-type cutting tool, or a blade-type or brazed-type cutting tool in which a tip is joined to a base body (holder) (a non-replaceable cutting tool). ). Attachment and detachment of the replaceable tip is not limited to using a clamp, but may also be done by inserting a screw into the tip.

For example, in embodiments, the illustrated cutting tool is left-handed. However, the cutting tool in the present disclosure is not limited to left-handed cutting tools. In other words, the cutting tool of the present disclosure can be applied to a right-hand tool, and can also be applied to a non-hand tool that can be used for both right-hand and left-hand tools.

For example, the recess in which the wireless communication unit shown in the fourth embodiment and the fifth embodiment is accommodated is not limited to the recess in which the sensor is accommodated. For example, the recess in which the wireless communication unit is accommodated may be a second recess other than the recess in which the sensor is accommodated. In this case, the position where the second recess is opened is arbitrary.

Furthermore, the positions at which the recesses in the first to fifth embodiments are opened can be set as appropriate. That is, the recess that opens on the first lateral side surface shown in the first embodiment may be located on the rear end side of the shank portion in the front-rear direction. Furthermore, the recessed portion that opens on the second lateral side surface shown in the second embodiment may be located on the tip side of the shank portion in the front-rear direction. Furthermore, the resin part shown in the fourth embodiment and the cover shown in the fifth embodiment may be applied to the first to third embodiments, respectively.

10, 10A, 10B, 10C, 10D... Data collection system 11, 11A, 11B, 11C, 11D... Cutting structure 12... Information processing device 20... Turret 22a... Placement surface 25... Urging part 25a... Contact surface 30, 30A, 30B, 30C, 30D... Cutting tool 40... Tip 41a... Rake face 41b... Flank surface 41c... Cutting edge 50, 50A, 50B, 50C, 50D... Holder 50a... Tip (first end)
50b...Rear end (second end)
51... Sensor 55D... Cover 60, 60A, 60B, 60C, 60D... Base 61... First lateral side 62... Second lateral side 63... First reference surface 63a... First region 64... Second reference surface 66... Fixed part 70, 70A, 70B, 70C, 70D...Shank portion 80, 80A, 80B, 80C, 80D...Concave portion 81...Opening L1...Straight line L2...Straight line Mt...Machine tool Ob...Object Te...Area

Claims (8)

A cutting tool having a cutting edge, and a tool rest holding the cutting tool,
The cutting tool is
a shank portion held by the tool rest and extending from a first end toward a second end ; a fixing portion located closer to the first end than the shank portion; and an outer surface of the shank portion. a base body having a concave portion opening to the base body;
a chip fixed to the fixed part and having the cutting edge;
a sensor located within the recess;
The turret is
a mounting surface on which the base is mounted;
one or more urging portions having a contact surface that contacts the shank portion and urging the shank portion from the contact surface toward the placement surface;
a side contact portion located between the placement surface and the contact surface ;
The base body is
a first reference surface extending from the first end toward the second end and having a first region in contact with the abutting surface;
a second reference surface located on the opposite side of the first reference surface and in contact with the placement surface;
a side surface located between the first reference surface and the second reference surface,
The side surface is
a first end surface located at the first end;
a first lateral side surface extending from the first end toward the second end;
a second lateral side located on the opposite side of the first lateral side and extending from the first end toward the second end;
The cutting edge protrudes from the base body on the first end side and the first lateral side, respectively,
The recessed portion is open to the second lateral side surface and covered by the side surface abutting portion,
A cutting structure in which at least a portion of the contact surface is separated from the recess when viewed in plan view in the biasing direction of the biasing section. The cutting structure according to claim 1, wherein more than half of the contact surface is separated from the recess when viewed from above in the urging direction of the urging section. The cutting structure according to claim 2, wherein the entire contact surface is separated from the recess when viewed in plan view in the urging direction of the urging section. The cutting structure according to any one of claims 1 to 3, wherein the recess is spaced apart from the first reference plane and the second reference plane. The cutting structure according to claim 4 , wherein a distance from the recess to the first reference surface is longer than a distance from the recess to the second reference surface. The cutting structure according to any one of claims 1 to 5 , wherein the depth of the recess is equal to or less than half the thickness of the shank portion in the depth direction of the recess. The cutting structure according to any one of claims 1 to 6 , wherein the tip has a rake face located along the cutting edge and facing the side facing the first reference surface. The cutting structure according to any one of claims 1 to 7 ,
a storage unit that stores information on physical quantities detected by the sensor;
A data collection system with

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