WO2020171156A1

WO2020171156A1 - Holder, cutting tool, production method for cut article, and data collection method

Info

Publication number: WO2020171156A1
Application number: PCT/JP2020/006693
Authority: WO
Inventors: 重孝橋本
Original assignee: 京セラ株式会社
Priority date: 2019-02-20
Filing date: 2020-02-20
Publication date: 2020-08-27
Also published as: JPWO2020171156A1; JP7199506B2

Abstract

According to the present invention, a holder has a rod-shaped body that extends along a center axis from a first end toward a second end, a first terminal that is for external connection, a sensor, and one or more wires. The body has a pocket that is on the first end side and a first side surface that extends from the first end to the second end. An insert that has a cutting blade can be installed in the pocket. The first terminal is on the first side surface. The sensor is closer to the pocket than the first terminal and can measure the state of the body. The one or more wires are connected to the sensor and the first terminal.

Description

Holder, cutting tool, manufacturing method of cut product, and data collection method

Cross-reference of related applications

This application claims the priority of Japanese Patent Application No. 2019-028648 filed on February 20, 2019, and the entire disclosure of the earlier application is incorporated herein by reference.

The present disclosure generally relates to a holder capable of measuring the state of cutting in cutting of a work material. More specifically, the present invention relates to a holder capable of communicating the measured cutting state with the outside.

As a cutting tool used when cutting a work material such as metal, for example, a cutting tool described in JP 2012-20359 A (Patent Document 1) is known. The cutting tool described in Patent Document 1 includes a main body portion, a cutting blade, a sensor portion, a cable member, and a communication portion. The state of cutting can be measured by detachably connecting the communication part to the cable member.

In the cutting tool described in Patent Document 1, the cable member is pulled out from the rear end surface of the main body. Therefore, it is difficult to bring the rear end face into contact with the carriage when attaching the cutting tool to the carriage. Therefore, it is difficult to position the cutting tool in the direction along the central axis of the main body.

A holder according to a non-limiting aspect of the present disclosure includes a rod-shaped body extending from a first end toward a second end along a central axis, a first terminal for external connection, a sensor, and one or more. And wiring. The main body has a pocket located on the side of the first end and a first side surface extending from the first end to the second end. Inserts with cutting edges can be attached to the pockets. The first terminal is located on the first side surface. The sensor is located closer to the pocket than the first terminal and can measure the state of the main body. One or more wirings are connected to the sensor and the first terminal.

It is a perspective view which shows the cutting tool of an example which is not limited. It is a disassembled perspective view of the cutting tool shown in FIG. It is an enlarged view of the area|region B1 shown in FIG. It is the perspective view which saw the cutting tool shown in FIG. 1 from another direction. It is the top view which looked at the cutting tool shown in FIG. 1 toward the 1st end. It is the top view which looked at the cutting tool shown in FIG. 1 toward the 2nd end. It is the side view which saw the cutting tool shown in FIG. 5 from the A1 direction. It is sectional drawing of the VIII-VIII cross section of the cutting tool shown in FIG. FIG. 8 is a sectional view of the cutting tool shown in FIG. 7 taken along the line IX-IX. It is an enlarged view of the area|region B2 shown in FIG. It is a disassembled perspective view which shows the cutting tool of an example which is not limited. It is the schematic which shows 1 process in the manufacturing method of the cutting processed product of an example which is not limited. It is the schematic which shows 1 process in the manufacturing method of the cutting processed product of an example which is not limited. It is the schematic which shows 1 process in the manufacturing method of the cutting processed product of an example which is not limited. It is a block diagram which shows the flow of the control method of the cutting process of embodiment. It is a flowchart of the control method of the cutting process of embodiment.

Hereinafter, the cutting tool 101 having the holders 1 of the plurality of embodiments without limitation of the present disclosure will be described in detail with reference to the drawings. However, in each of the drawings referred to below, for convenience of description, only the main members necessary for describing each embodiment are simplified and shown. Accordingly, the cutting tool 101 may include any component not shown in the referenced figures. Further, the dimensions of the members in each drawing do not faithfully represent the actual dimensions of the constituent members and the dimensional ratios of the respective members.

<Cutting tool>
The cutting tool 101 may include, for example, a turning tool, a rolling tool, a drill, and the like. Turning tools may include outer diameter machining tools, inner diameter machining tools, grooving tools and parting tools. Milling tools, end mills and the like may be mentioned as milling tools.

The cutting tool 101 of the non-limiting embodiment may include the holder 1 and the cutting insert 3 (hereinafter, also simply referred to as the insert 3). The cutting tool 101 in the non-limiting example shown in FIG. 1 is a turning tool. As described above, there is no problem even if the cutting tool 101 is a rolling tool or a drill.

The holder 1 of the non-limiting embodiment may include a main body 5, a first terminal 7 for external connection, a sensor 9, and one or more wirings 11. The body 5 in a non-limiting embodiment may be rod-shaped extending from the first end 1a to the second end 1b. Generally, the first end 1a is the front end and the second end 1b is the rear end. As in the non-limiting example shown in FIG. 1, the body 5 may be square pole shaped. When the virtual axis extending from the first end 1a to the second end 1b is the central axis O1, the main body 5 has the central axis O1 and can be said to extend along the central axis O1.

The main body 5 may have a first end surface 13, a second end surface 15, a first side surface 17, a second side surface 19, a third side surface 21, and a fourth side surface 23, as in a non-limiting example shown in FIG. 1. .. The first end surface 13 may be located at the first end 1a. The second end surface 15 may be located at the second end 1b.

The first side surface 17, the second side surface 19, the third side surface 21, and the fourth side surface 23 may each extend from the first end 1a to the second end 1b. The second side surface 19 may be located on the opposite side of the first side surface 17. The third side surface 21 and the fourth side surface 23 may be located between the first side surface 17 and the second side surface 19, respectively. The fourth side surface 23 may be located on the opposite side of the third side surface 21. The third side surface 21 and the fourth side surface 23 may be orthogonal to the first side surface 17 and the second side surface 19, respectively.

The main body 5 in the non-limiting embodiment may further include a pocket 25 located on the side of the first end 1a. An insert 3 having a cutting edge 27 can be attached to the pocket 25. The pocket 25 may be opened to the first end surface 13, the first side surface 17, and the third side surface 21 as in a non-limiting example shown in FIG. 1.

The insert 3 has a cutting edge 27, and may have a function of cutting a work material during cutting. As in a non-limiting example shown in FIG. 1, the insert 3 has a square plate shape and has a first surface 29 and a second surface 31. The first surface 29 may have a first region 29a in which chips flow. The first region 29a is generally called a rake face.

The second surface 31 may be adjacent to the first surface 29. The second surface 31 may have a second region 31a facing the processed surface of the work material. The second region 31a is generally called a flank. The cutting edge 27 may be located on at least a part of a ridgeline where the first surface 29 and the second surface 31 intersect.

The first surface 29 of the insert 3 may be positioned substantially parallel to the third side surface 21 of the body 5 as in a non-limiting example shown in FIG. In other words, the first surface 29 may be positioned so as to be substantially orthogonal to the first side surface 17 and the second side surface 19. In this case, the main component force is likely to be applied to the cutting tool 101 in a direction substantially orthogonal to the third side surface 21.

The shape of the insert 3 is not limited to the above form. The insert 3 of the non-limiting embodiment may have a rectangular plate shape in which the shape of the first surface 29 is a quadrangle. However, the shape of the first surface 29 may be triangular, pentagonal or hexagonal, for example. That is, the insert 3 may have, for example, a triangular plate shape, a pentagonal plate shape, or a hexagonal plate shape.

The size of the insert 3 is not particularly limited. For example, the length of one side of the first surface 29 may be set to about 3 to 20 mm. Further, the height of the insert 3 shown in the direction orthogonal to the first surface 29 may be set to about 5 to 20 mm.

The material of the insert 3 may include, for example, cemented carbide and cermet. The composition of the cemented carbide may include, for example, WC-Co, WC-TiC-Co and WC-TiC-TaC-Co. Here, WC, TiC, and TaC may be hard particles, and Co may be a binder phase.

Also, the cermet may be a sintered composite material in which a metal is combined with a ceramic component. Specifically, the cermet may include a titanium compound containing titanium carbide (TiC) and/or titanium nitride (TiN) as a main component. However, it goes without saying that the material of the insert 3 is not limited to the above composition.

The surface of the insert 3 may be coated with a film using a chemical vapor deposition (CVD) method or a physical vapor deposition (PVD) method. The coating composition may include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), alumina (Al ₂ O ₃ ), and the like.

The size of the main body 5 is not particularly limited. For example, the length from the first end 1a to the second end 1b may be set to about 50 to 200 mm. The distance between the first side surface 17 and the second side surface 19 may be set to about 5 to 30 mm. The distance between the third side surface 21 and the fourth side surface 23 may be set to about 5 to 30 mm.

The main body 5 may be composed of one member, or may be composed of a plurality of members as described later.

The material of the main body 5 may include, for example, metal and resin. Metals may include, for example, steel and cast iron. Examples of the resin may include a polycarbonate resin, a polyethylene terephthalate resin, an acrylic resin, a polyvinyl chloride resin, a silicone resin and an epoxy resin. From the viewpoint of enhancing the toughness of the main body 5, steel may be used among these materials.

The first terminal 7 may be a terminal for electrically connecting the sensor 9 to an external wiring. Electric power may be supplied to the sensor 9 from an external power source by connecting the cable member 33 to the first terminal 7. Further, the information measured by the sensor 9 may be transmitted to the outside by connecting the cable member 33 to the first terminal 7.

The first terminal 7 in the non-limiting embodiment may be located on the first side surface 17 instead of the second end surface 15 of the main body 5. Therefore, when the holder 1 is attached to the machine tool, the second end surface 15 can be brought into contact with the machine tool, for example, a turret. Therefore, the positioning of the holder 1 in the direction along the central axis O1 is easy.

Also, the first terminal 7 is not located on the second end surface 15. Therefore, when the second end surface 15 is brought into contact with the machine tool, the first terminal 7 is prevented from being sandwiched between the machine tool and the main body 5. Therefore, the first terminal 7 or the cable member 33 connected to the first terminal 7 is less likely to be damaged.

The sensor 9 may be located closer to the pocket 25 than the first terminal 7. The sensor 9 may be located on the surface of the main body 5 or may be located inside the main body 5. In a non-limiting example shown in FIG. 2, the first side surface 17 of the body 5 may have a first recess 35 in which the sensor 9 may be located. Specifically, the first recess 35 may be located between the pocket 25 and the first terminal 7 on the first side surface 17.

Chips may be generated at the cutting edge 27 during cutting of a work material for manufacturing a cut product. Further, the cooling liquid (coolant) may be jetted toward the cutting edge 27. When the main body 5 has the first recess 35 and the sensor 9 is located in the first recess 35, the sensor 9 is not easily affected by the scattering of chips and the injection of the cooling liquid. Therefore, the durability of the sensor 9 is high.

In addition, when the main body 5 has the first concave portion 35 and the sensor 9 is located in the first concave portion 35, the main body 5 is more likely to be compared with the case where the sensor 9 is located inside the main body 5. The sensor 9 can be easily attached.

The sensor 9 is a member that can measure the state of the main body 5 during cutting. Examples of the state of the main body 5 may include physical quantities such as temperature, acceleration, vibration, strain, internal stress, and wear. Measuring the state of the main body 5 means measuring at least one information of the physical quantities represented by the above in the main body 5. The measurement target is not limited to information in a static state, but may be information in a dynamic state, that is, a change in state.

For example, the information of the measurement target is the temperature. Further, it is assumed that the temperature of the main body 5 before cutting is 20° and the temperature of the main body 5 rises to 80° during cutting. At this time, 20°, which is the temperature of the main body 5 before cutting, is information in a static state regarding the temperature. Further, the rise in the temperature of the main body 5 from 20° to 80° is the information in the dynamic state regarding the temperature. Either one of these pieces of information may be measured, or both of them may be measured.

For example, when the holder 1 has a thermocouple as the sensor 9, it is possible to measure the temperature of the main body 5. Even when the holder 1 has a piezoelectric sensor using a piezo element, it is possible to measure acceleration, vibration, strain, internal stress, and the like. Further, the holder 1 may have a wiring circuit that functions as the sensor 9. Specifically, when the wiring circuit wears with the wear of the main body 5 and the resistance value of the circuit changes, the wear state of the main body 5 may be measured by the change in the resistance value.

The state of the main body 5 that can be measured by the sensor 9 is not limited to the above physical property values. Further, the sensor 9 is not limited to the above specific example, and other elements not particularly described may be used as long as they can measure the physical property values of the main body 5 exemplified above. For example, a camera and a microphone may be mentioned.

Also, by measuring the state of the main body 5, for example, the state of the cutting edge 27 of the insert 3 can be evaluated. When the sensor 9 is located closer to the pocket 25 than the first terminal 7, the state of the insert 3 is easily evaluated with high accuracy. In particular, when the distance from the sensor 9 to the pocket 25 (first distance L1) is shorter than the distance from the sensor 9 to the second end 1b (second distance L2), the state of the insert 3 is more accurate. Easy to be evaluated.

The holder 1 may have a cover member 63. The cover member 63 may be located at the opening of the recess 35, as in a non-limiting example shown in FIG. In other words, the cover member 63 is located above the sensor 9. When the holder 1 has such a cover member 63, the sensor 9 is less likely to be damaged during cutting.

Also, as in a non-limiting example shown in FIG. 11, the first side surface 17 of the main body 5 may have the second recess 37, and the first terminal 7 may be located in the second recess 37. When the first terminal 7 is located in the second recess 37, the influence of the scattering of chips and the injection of the cooling liquid may affect the first terminal 7 for the same reason as when the sensor 9 is located in the first recess 35. Is hard to receive.

The holder 1 of the non-limiting embodiment may include one or a plurality of wirings 11 as a member for connecting the sensor 9 and the first terminal 7 by wire. When the holder 1 has the wiring 9 connected to the sensor 9 and the first terminal 7, it is possible to supply electric power to the sensor 9 from an external power supply. Further, when the holder 1 has the wiring 11, it is possible to transmit information between the sensor 9 and the outside.

When the holder 1 has a plurality of wirings 11, the plurality of wirings 11 has a first wiring for supplying electric power to the sensor 9 from an external power source and a second wiring for transmitting information between the outside. And wiring. As the wiring 11, for example, a metal having good conductivity may be used, or an optical wiring may be used.

The wiring 11 may be located on the surface of the main body 5 or may be located inside the main body 5. FIG. 8 illustrates a configuration in which the wiring 11 is located inside the main body 5. When the wiring 11 is located inside the main body 5, the wiring 11 is less likely to be affected by the scattering of chips and the jetting of the cooling liquid. When the wiring 11 is located inside the main body 5, at least a part of the wiring 11 may extend along the central axis O1 from the first end 1a side toward the second end 1b.

The wiring 11 may be separated from the cutting edge 27 when seen from the front side from the first end 1a side. A cutting load may be applied to the holder 1 from the first end 1a side toward the second end 1b side during cutting. For example, in the cutting tool 101 as shown in FIG. 1, a back force may be applied from the first end 1a side toward the second end 1b side. Here, when the wiring 11 is separated from the cutting edge 27 as described above, the above-mentioned back force is hard to be transmitted to the wiring 11. Therefore, the durability of the wiring 11 is high.

The wiring 11 may be located closer to the first side surface 17 than the central axis O1 when seen in a plan view from a direction orthogonal to the central axis O1 and parallel to the first side surface 17. In this case, the length of the wiring 11 that connects the first terminal 7 and the sensor 9 located on the first side surface 17 can be shortened. Therefore, the holder 1 can be easily manufactured.

When viewed in a plan view from the first end 1a side, the cutting edge 27 may protrude from the main body 5 in the direction from the central axis O1 toward the first side surface 17 (left direction in FIG. 5).

When the first terminal 7 is located on the first side surface 17 and the cutting edge 27 projects in the direction toward the first side surface 17, the positioning with respect to the machine tool in the direction orthogonal to the first side surface 17 can be easily performed. It is possible to provide the cutting tool 101 capable of performing the above. This is because when the cutting tool 101 has the above-described configuration, the surface located on the opposite side of the first side surface 17, that is, the second side surface 19, is easily brought into contact with the machine tool.

When the sensor 9 is located on the first side surface 17 as in a non-limiting example shown in FIG. 2, it is easy to bring the second side surface 19 into contact with the machine tool and measure the state of the main body 5 with high accuracy. Is possible. This is because the information on the state of the main body 5 is less susceptible to the noise caused by the machine tool itself, as compared with the case where the sensor 9 is located on the second side surface 19.

The holder 1 may have a first wireless communication unit 39 capable of wirelessly communicating the information of the main body 5 measured by the sensor 9 with the outside, as in a non-limiting example shown in FIG. .. As in a non-limiting example illustrated in FIG. 8, the first wireless communication unit 39 may be located inside the main body 5 and connected to the sensor 9 by wire. Information of the main body 5 measured by the sensor 9 may be transmitted to the first wireless communication unit 39.

The information of the main body 5 transmitted to the first wireless communication unit 39 can be wirelessly communicated with the outside in the first wireless communication unit 39. In FIG. 15, a second wireless communication unit 41 is illustrated as an external member capable of wirelessly communicating with the first wireless communication unit 39.

When the external member that performs wireless communication with the first wireless communication unit 39 is the second wireless communication unit 41, the information of the main body 5 measured by the sensor 9 is transmitted from the first wireless communication unit 39, The wireless communication unit 41 may receive it. The information of the main body 5 received by the second wireless communication unit 41 can be transmitted to the evaluation unit 43. The evaluation unit 43 can evaluate the state of the main body 5.

Based on the evaluation result, processing conditions such as the feed amount, the rotation speed of the work material, and the injection amount of the coolant (coolant) may be changed. In addition, the cutting process may be stopped in some cases. Note that the cutting tool 101 of the non-limiting embodiment is a turning tool, but when the cutting tool 101 is a rolling tool or a drill, the rotation speed of the cutting tool 101 is also included as a processing condition that can be changed.

The wireless communication described above is not limited to the transmission of information from the first wireless communication unit 39 to the second wireless communication unit 41, but the transmission of information from the second wireless communication unit 41 to the first wireless communication unit 39. Is a concept that includes. The wireless communication described above may be bidirectional information transmission/reception between the first wireless communication unit 39 and the second wireless communication unit 41.

The first wireless communication unit 39 may be located on the surface of the main body 5 or may be located inside the main body 5. FIG. 8 illustrates a configuration in which the first wireless communication unit 39 is located inside the main body 5. When the first wireless communication unit 39 is located inside the main body 5, the first wireless communication unit 39 is less likely to be affected by the scattering of chips and the injection of the cooling liquid.

As in a non-limiting example shown in FIG. 1, the main body 5 may have a first member 57 including the first end 1a and a second member 59 including the second end 1b. Further, the antenna member 51 may be located inside the second member 59. In other words, the antenna member 51 may be covered by the second member 59.

Here, the material of the first member 57 may be metal and the material of the second member 59 may be resin. When the material of the first member 57 is metal, the heat resistance against heat generated during cutting is high. When the material of the second member 59 is resin, it is possible to satisfactorily send and receive information to and from the second wireless communication unit 41.

<Method of manufacturing cut products>
Next, a method for manufacturing a cut product according to a non-limiting embodiment will be described with reference to the drawings.

The cut product 201 can be produced by cutting the work material 203. The method for manufacturing the machined product 201 in the non-limiting embodiment may include the following steps. That is,
(1) a step of rotating the work material 203,
(2) a step of bringing the cutting material 101 represented by the above-described non-limiting embodiment into contact with the rotating work material 203,
(3) a step of separating the cutting tool 101 from the work material 203,
Equipped with.

More specifically, first, as shown in FIG. 12, the work material 203 may be rotated around the axis O2, and the cutting tool 101 may be brought relatively close to the work material 203. Next, as shown in FIG. 13, the cutting edge of the cutting tool 101 may be brought into contact with the work material 203 to cut the work material 203. Then, as shown in FIG. 14, the cutting tool 101 may be relatively separated from the work material 203.

In a non-limiting embodiment, the cutting tool 101 may be moved in the Y1 direction while the shaft O2 is fixed and the work material 203 is rotated to move the work material 203 closer to the work material 203. Further, in FIG. 13, the work material 203 may be cut by bringing the cutting edge of the insert 3 into contact with the rotating work material 203. In addition, in FIG. 14, the cutting tool 101 may be moved away in the Y3 direction while the work material 203 is being rotated.

In the cutting process in the manufacturing method of the non-limiting embodiment, in each step, the cutting tool 101 is moved to bring the cutting tool 101 into contact with the work material 203, or the cutting tool 101 is removed from the work material 203. Although separated, it is of course not limited to such a form.

For example, in the step (1), the work material 203 may be brought close to the cutting tool 101. Similarly, in the step (3), the work material 203 may be moved away from the cutting tool 101. When the cutting process is continued, the process of keeping the work material 203 rotated and bringing the cutting edge of the insert 3 into contact with a different position of the work material 203 may be repeated.

Note that typical examples of the material of the work material 203 include carbon steel, alloy steel, stainless steel, cast iron, or non-ferrous metal.

<Control method of cutting processing>
Next, a cutting control method according to a non-limiting embodiment will be described with reference to the drawings.

By cutting the work material 203 in the above step (2), the state of the main body changes. For example, since a cutting load is applied to the cutting tool 101 during cutting, the main body may vibrate, and strain and internal stress may occur in the main body. Further, the temperature of the main body rises due to the cutting work, and the vibration mode of the main body may change due to the wear of the cutting edge.

For example, when the sensor 9 is a thermocouple, the temperature of the main body can be measured. Further, when the sensor 9 is a piezoelectric sensor, vibration, strain and internal stress of the main body can be measured. In this way, the sensor 9 may have a measuring means for measuring the state of the main body.

Information measured by the sensor 9 may be transmitted from the sensor 9 to the first wireless communication unit 39. That is, the sensor 9 may include a first transmission unit C1 that transmits the measured information to the first wireless communication unit 39, as shown in FIG. The information transmitted from the sensor 9 may be transmitted from the first wireless communication unit 39 to the outside. That is, the first wireless communication unit 39 may include the second transmission unit C2 that wirelessly communicates the information transmitted from the sensor 9 with the outside.

The information transmitted from the first wireless communication unit 39 to the outside may be received by the second wireless communication unit 41 and transmitted to the evaluation unit 43, for example. The information transmitted to the evaluation unit 43 can be compared with the information based on the previously measured result, and the state of the main body can be evaluated. That is, the evaluation unit 43 may include a first evaluation unit that evaluates the state of the main body.

The processing conditions such as the feed amount, the rotation speed of the work material, and the injection amount of the cooling liquid may be changed when the state of the main body evaluated as described above satisfies the predetermined conditions. The changed machining conditions may be transmitted to the second controller 61 in the machine tool. That is, the evaluation unit 43 evaluates the processing conditions based on the result evaluated by the first evaluation unit, and the changed processing conditions evaluated by the second evaluation unit, the second wireless communication unit 41. And a third transmitting means C3 for transmitting to.

The second wireless communication unit 41 may have a fourth transmission unit C4 that transmits information to the second control unit 61 in the machine tool. The modified processing conditions described above may be transmitted to the second control unit 61 by the fourth transmission unit C4. Then, as shown in FIG. 15, the cutting process may be continued or the cutting process may be stopped depending on the changed processing conditions. By the above process, cutting can be performed under appropriate processing conditions.

The evaluation unit 43 may also have a third evaluation means for evaluating whether or not the cutting tool 101 has been separated from the work material. In the step (3) described above, the cutting tool 101 is separated from the work material. Therefore, the vibration, strain and/or internal stress of the main body 5 can be almost zero.

For example, it may be evaluated that the cutting tool 101 has been separated from the work material when the information regarding vibration, strain, internal stress, etc. has fallen below a predetermined strength for a certain period of time.

101... Cutting tool 1... Holder 1a... 1st end 1b... 2nd end 3... Cutting insert (insert)
5... Main body O1... Central axis 7... 1st terminal 9... Sensor 11... Wiring 13... 1st end surface 15... 2nd end surface 17... 1st side surface 19・・・Second side surface 21 ・・・Third side surface 23 ・・・Fourth side surface 25 ・・・Pocket 27 ・・・Cutting blade 29 ・・・First surface 29 a ・・・First area 31 ・・・Second Surface 31a... Second area 33... Cable member 35... First recess L1... First distance L2... Second distance 37... Second recess 39... First wireless communication unit 41... Second wireless communication unit 43... Evaluation unit 57... First member 59... Second member 61... Second control unit 63... Cover member 101... Cutting work product 103... Work material

Claims

A rod shape extending from the first end to the second end along the central axis,
A pocket on the side of the first end, to which an insert having a cutting edge can be attached,
A first side surface extending from the first end to the second end;
A body having
A first terminal for external connection located on the first side surface;
A sensor that is located closer to the pocket than the first terminal and is capable of measuring the state of the main body;
A holder comprising: the sensor; and one or more wirings connected to the first terminal.
The holder according to claim 1, wherein the wiring is located inside the main body.
The holder according to claim 2, wherein at least a part of the wiring extends along the central axis from the first end side toward the second end.
4. The wiring according to any one of claims 1 to 3, wherein the wiring is located closer to the first side surface than the central axis when seen in a plan view from a direction orthogonal to the central axis and parallel to the first side surface. The holder described in one.
The holder according to any one of claims 1 to 4, wherein the sensor is located on the first side surface.
The first side surface has a recess,
The holder according to any one of claims 1 to 5, wherein the first terminal is located in the recess.
A holder according to any one of claims 1 to 6,
A cutting tool comprising: the insert located in the pocket.
The cutting tool according to claim 7, wherein the wiring is separated from the cutting edge when seen in a plan view from the side of the first end.
The cutting tool according to claim 7 or 8, wherein the cutting edge projects from the main body in a direction from the central axis toward the first side surface when viewed in a plan view from the first end side.
Rotate the work material,
The cutting tool according to any one of claims 7 to 9 is brought into contact with the rotating work material,
A method of manufacturing a machined product, comprising separating the cutting tool from the work material.
Rotate the work material,
The cutting tool according to any one of claims 7 to 9 is brought into contact with the work material,
The sensor measures the state of the body,
A method of collecting data, comprising wirelessly communicating information measured by the sensor with the outside through the antenna member.