Lathe tool

Abstract

To provide a lathe tool which can easily receive a signal including information obtained by a sensor at a receiver installed at the outside while inhibiting missing of the information.SOLUTION: A lathe tool includes: a metallic body 10 which has a bar shape and in which a recessed part is formed on its surface; a sensor which is installed at the body and detects a first physical amount of the body; and a communication module 20 which is connected to the sensor and transmits information including the first physical amount detected by the sensor to the outside. The communication module is housed in the recessed part. The communication module includes: a resin substrate; and a wireless communication part disposed on the substrate and including an antenna. In a substrate thickness direction, a distance from the antenna to an opening of the recessed part is smaller than or equal to a distance from the antenna to a bottom of the recessed part.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present disclosure relates to turning tools. [Background technology]

[0002] A technique is known for determining the state of a cutting tool by measuring a physical quantity, such as strain, of the cutting tool using a sensor during machining with the cutting tool (see, for example, JP 2020-62746 A (Patent Document 1)). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-62746 A Summary of the Invention

[0004] A turning tool according to the present disclosure is a turning tool that cuts a rotating workpiece by contacting the workpiece. The turning tool includes a rod-shaped metal body having a recess formed on its surface, a sensor that is installed in the body and detects a first physical quantity of the body, and a communication module that is connected to the sensor and transmits information including the first physical quantity detected by the sensor to the outside. The communication module is accommodated in the recess. The communication module includes a resin substrate and a wireless communication unit that is disposed on the substrate and includes an antenna. In the thickness direction of the substrate, the distance from the antenna to the opening of the recess is equal to or less than the distance from the antenna to the bottom of the recess. [Brief description of the drawings]

[0005] [Figure 1] FIG. 1 is a schematic perspective view showing the structure of a cutting tool. [Diagram 2] FIG. 2 is a schematic perspective view showing the structure of the cutting tool. [Diagram 3] FIG. 3 is a schematic perspective view showing the structure of the cutting tool in FIG. 1 with the cover removed. [Figure 4] FIG. 4 is a schematic perspective view showing the structure of the cutting tool in FIG. 2 with the cover removed. [Diagram 5] FIG. 5 is a schematic plan view showing the structure of the cutting tool as viewed from the first end side. [Figure 6] FIG. 6 is a schematic plan view showing the structure of the cutting tool as viewed from the second end side. [Figure 7] FIG. 7 is a schematic cross-sectional view showing a state in which the communication module is accommodated in the first recess. [Figure 8] FIG. 8 is a schematic plan view showing a state in which the communication module is accommodated in the first recess. [Figure 9] FIG. 9 is a schematic cross-sectional view showing the structure of the first lid. [Figure 10] FIG. 10 is a schematic perspective view showing the structure of the turret. [Figure 11] FIG. 11 is a schematic perspective view showing a state in which a turning tool is held by the turret. [Figure 12] FIG. 12 is a schematic cross-sectional view showing a state in which the communication module according to the second embodiment is accommodated in the first recess. [Figure 13] FIG. 13 is a schematic cross-sectional view showing a state in which the communication module according to the third embodiment is accommodated in the first recess. [Figure 14] FIG. 14 is a schematic perspective view showing the structure of the metal plate. [Figure 15] FIG. 15 is a schematic perspective view showing a structure of a cutting tool according to the fourth embodiment. [Figure 16] FIG. 16 is a schematic cross-sectional view showing a state in which the communication module according to the fifth embodiment is accommodated in the first recess. [Figure 17] FIG. 17 is a schematic cross-sectional view showing a state in which the communication module according to the sixth embodiment is accommodated in the first recess. [Figure 18] FIG. 18 is a schematic cross-sectional view showing a state in which the communication module according to the sixth embodiment is accommodated in the first recess. [Figure 19]FIG. 19 is a schematic plan view showing a state in which the communication module according to the sixth embodiment is accommodated in the first recess. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0006] [Problem that this disclosure aims to solve] From the viewpoint of grasping the state of the turning tool in detail during machining, it is required that a signal including information obtained by a sensor be received by an externally installed receiver while suppressing loss of information. It is an object of the present disclosure to provide a turning tool that allows a signal including the information obtained by the sensor to be easily received by an externally installed receiver while suppressing loss of information obtained by the sensor.

[0007] [Effects of this disclosure] According to the turning tool disclosed herein, it is possible to provide a turning tool that suppresses loss of information obtained by a sensor while easily allowing a signal including that information to be received by an externally installed receiver.

[0008] [Description of the embodiments of the present disclosure] First, the embodiments of the present disclosure will be listed and described. The turning tool of the present disclosure is a turning tool that cuts a rotating workpiece by contacting the workpiece. The turning tool includes a metal body having a rod-like shape and a recess formed on the surface, a sensor that is installed in the body and detects a first physical quantity of the body, and a communication module that is connected to the sensor and transmits information including the first physical quantity detected by the sensor to the outside. The communication module is accommodated in the recess. The communication module includes a resin substrate and a wireless communication unit that is arranged on the substrate and includes an antenna. In the thickness direction of the substrate, the distance from the antenna to the opening of the recess is equal to or less than the distance from the antenna to the bottom of the recess.

[0009] In the turning tool of the present disclosure, a communication module is accommodated in a recess of a metal main body. Here, according to the study of the present inventors, by increasing the distance from the antenna to the bottom of the recess, the loss of information received by the receiver installed outside is reduced. Also, by reducing the distance from the antenna to the opening of the recess, the loss of information received by the receiver installed outside is reduced. And, in the turning tool of the present disclosure, the distance from the antenna to the opening of the recess in the thickness direction of the substrate is set to be equal to or less than the distance from the antenna to the bottom of the recess. This sufficiently reduces the loss of information received by the receiver installed outside. In this way, according to the turning tool of the present disclosure, it is possible to provide a turning tool that can easily receive a signal including the information obtained by the sensor in the receiver installed outside while suppressing the loss of the information. The distance from the antenna to the opening of the recess may be smaller than the distance from the antenna to the bottom of the recess.

[0010] In the turning tool, the communication module may further include a resin layer disposed between the substrate and the bottom of the recess. With this configuration, it is easy to set the distance from the antenna to the opening of the recess shorter than the distance from the antenna to the bottom of the recess.

[0011] In the turning tool, the resin layer may be in contact with the entire first main surface, which is the main surface facing the bottom of the recess of the substrate. With this configuration, the substrate can be stably supported by the resin layer.

[0012] In the turning tool, the resin layer may be a resin spacer. This configuration makes it easier to set the distance from the antenna to the opening of the recess shorter than the distance from the antenna to the bottom of the recess.

[0013] In the turning tool, the spacer may have a flat plate shape. With this configuration, the substrate can be stably supported by the spacer.

[0014] In the above turning tool, the spacer may include a bottom wall portion located between the substrate and the bottom of the recess, and a side wall portion rising from the bottom wall portion and contacting at least a part of the substrate to restrict movement of the substrate. With this configuration, during assembly, the substrate is placed on the spacer so that the substrate contacts the side wall portion, making it easy to position the substrate relative to the spacer. Furthermore, by appropriately positioning the spacer in the recess, it becomes easy to position the substrate in the recess, making it easy to position the antenna in an appropriate position.

[0015] In the turning tool, the resin layer may be a double-sided tape made of resin. With this configuration, it is easy to set the distance from the antenna to the opening of the recess to be shorter than the distance from the antenna to the bottom of the recess, and the communication module can be easily fixed to the main body.

[0016] In the turning tool, the thickness of the substrate may be half or more of the depth of the recess. This configuration makes it easy to set the distance from the antenna to the opening of the recess shorter than the distance from the antenna to the bottom of the recess.

[0017] In the turning tool, the recess may include a deep region that is deeper than other portions. The antenna and the deep region may overlap in the thickness direction of the substrate. This configuration makes it easy to set the distance from the antenna to the opening of the recess shorter than the distance from the antenna to the bottom of the recess.

[0018] In the turning tool, the main body may include a metal plate that forms the bottom of the recess and has a notch. The notch may correspond to the deep region. By using a metal plate that has a notch, it is easy to set the distance from the antenna to the opening of the recess to be shorter than the distance from the antenna to the bottom of the recess.

[0019] The turning tool may further include a lid for closing the opening of the recess. The lid may include a metal base having a window penetrating the lid in the thickness direction of the substrate, and a resin, rubber, or ceramic window member for sealing the window. By employing the lid in this manner, the communication module housed in the recess can be protected. Furthermore, by employing a metal main body, the rigidity of the turning tool can be improved. Furthermore, by employing a non-metallic window, a signal transmitted from the communication module can be transmitted to the outside while suppressing loss of information obtained by the sensor.

[0020] The antenna and the window may overlap in the thickness direction of the substrate. With this configuration, loss of information obtained by the sensor can be further reduced.

[0021] The turning tool may further include a resin, rubber, or ceramic lid for closing the opening of the recess. By using such a lid, the communication module housed in the recess can be protected. By using a nonmetallic material for the lid, the signal emitted from the communication module can be transmitted to the outside while preventing loss of information obtained by the sensor.

[0022] In the turning tool, the recess may be filled with a resin filler, thereby sealing the communication module with the filler. With this configuration, the communication module can be protected more reliably. Also, the resonant frequency of the antenna can be adjusted by the filler.

[0023] [Details of the embodiment of the present invention] Next, an embodiment of a turning tool according to the present disclosure will be described below with reference to the drawings. In the following drawings, the same or corresponding parts are designated by the same reference numerals, and description thereof will not be repeated.

[0024] (Embodiment 1) (1) Structure of the main body FIG. 1 is a schematic perspective view showing the structure of the cutting tool. FIG. 2 is a schematic perspective view showing the structure of the cutting tool seen from a different viewpoint than that of FIG. 1. FIG. 3 is a schematic perspective view showing the structure of the cutting tool in a state where the lid is removed in FIG. 1. FIG. 4 is a schematic perspective view showing the structure of the cutting tool in a state where the lid is removed in FIG. 2. FIG. 5 is a schematic plan view showing the structure of the cutting tool seen from a first end side. FIG. 6 is a schematic plan view showing the structure of the cutting tool seen from a second end side.

[0025] 1 to 6, the turning tool 1 of the present embodiment includes a rod-shaped main body 10 extending from a first end 10A to a second end 10B. In this specification, the direction extending from the first end 10A to the second end 10B, i.e., the longitudinal direction of the main body 10, is the Y direction. The width direction of the main body 10 perpendicular to the Y direction is the X direction. The height direction of the main body 10 perpendicular to the X direction and the Y direction is the Z direction. The main body 10 is made of metal. The shape of the main body of the present disclosure is not particularly limited, but for example, the main body 10 in the present embodiment has a rectangular parallelepiped shape. The surface of the main body 10 includes a first surface 11, a second surface 12, a third surface 13, a fourth surface 14, a fifth surface 15, and a sixth surface 16. The first surface 11 includes a first region 11A, a third region 11C disposed on the first end 10A side of the first region 11A, and a second region 11B which is a step portion connecting the first region 11A and the third region 11C. A holding portion 19 which is a recess for holding a cutting tip 90 is formed in the first end 10A of the main body portion 10. The holding portion 19 opens in the third region 11C of the first surface 11, the fourth surface 14, and the fifth surface 15. The cutting tip 90 and a base plate 81 are disposed in the holding portion 19. The cutting tip 90 is disposed in a stacked manner on the base plate 81. A fixing portion 82 for fixing the cutting tip 90 is disposed on the fourth surface 14 near the first end 10A. The cutting tip 90 is held by being sandwiched between the base plate 81 and the fixing portion 82. The cutting tip 90 is detachably fixed by the rotatable fixing portion 82. The cutting tip 90 includes flanks 90A and 90B. The turning tool 1 is a cutting tool that cuts a rotating workpiece by contacting the cutting tip 90 with the workpiece. That is, the turning tool 1 is a cutting tool used for turning.

[0026] 3 and 4, a first recess 11E is formed in the first region 11A of the first surface 11 of the main body 10. A second recess 12E is formed in the second surface 12. A third recess 13E is formed in the third surface 13. A battery accommodating section 11F, which is a recess for accommodating a battery 61, is formed in the first region 11A of the first surface 11 on the second end 10B side as viewed from the first recess 11E. The battery 61 is accommodated in the battery accommodating section 11F.

[0027] (2) Placement of sensors and communication modules 3 and 4, a first substrate 51 is disposed in the first recess 11E. A second substrate 52 is disposed in the second recess 12E. A third substrate 53 is disposed in the third recess 13E. Each of the first substrate 51, the second substrate 52, and the third substrate 53 includes a substrate body made of an insulator such as resin, and a circuit pattern (not shown) made of a conductor such as copper that is formed on the surface of the substrate body.

[0028] A connector 33 is disposed on the first substrate 51. A connector 34 is disposed on the second substrate 52. The first recess 11E and the second recess 12E are connected by the first through hole 10D. The connector 34 and the connector 33 are connected by a flexible cable 54 passing through the first through hole 10D. This electrically connects the first substrate 51 and the second substrate 52. A connector 35 is disposed on the second substrate 52. A connector 37 is disposed on the third substrate 53. The second recess 12E and the third recess 13E are connected by the second through hole 10H. The connector 35 and the connector 37 are connected by a flexible cable 55 passing through the second through hole 10H. This electrically connects the second substrate 52 and the third substrate 53.

[0029] A wireless communication unit 31 is disposed on the first substrate 51. The wireless communication unit 31 includes an antenna 32. The wireless communication unit 31 including the antenna 32 and the first substrate 51 configure a communication module 20. The communication module 20 is accommodated in the first recess 11E. As the antenna 32, for example, a chip antenna or a pattern antenna can be adopted.

[0030] A first strain sensor 45 is disposed on the second surface 12. The first strain sensor 45 detects strain as a first physical quantity on the second surface 12 of the main body 10. The first strain sensor 45 is disposed in the second recess 12E of the second surface 12. A wiring 46 as a first wiring is connected to the first strain sensor 45. The first strain sensor 45 and the wiring 46 constitute a first strain sensor component 44. A connector 36 is disposed on the second substrate 52. The wiring 46 is connected to the connector 36. As a result, the first strain sensor 45 is electrically connected to the second substrate 52.

[0031] A second strain sensor 48 is disposed on the third surface 13. The second strain sensor 48 detects strain as a first physical quantity on the third surface 13 of the main body 10. The second strain sensor 48 is disposed in a third recess 13E of the third surface 13. A wiring 49 as a second wiring is connected to the second strain sensor 48. The second strain sensor 48 and the wiring 49 configure a second strain sensor component 47. A connector 38 is disposed on the third substrate 53. The wiring 49 is connected to the connector 38. As a result, the second strain sensor 48 is electrically connected to the third substrate 53.

[0032] The communication module 20 is electrically connected to the first strain sensor 45 and the second strain sensor 48 via the first substrate 51, the second substrate 52, and the third substrate 53. The communication module 20 transmits information on the strain of the main body 10 detected by the first strain sensor 45 and the second strain sensor 48 to the outside. Note that, instead of one or both of the first strain sensor 45 and the second strain sensor 48, a sensor that detects another physical quantity, such as an acceleration sensor, may be used. Also, in addition to the first strain sensor 45 and the second strain sensor 48, a sensor that detects another physical quantity, such as an acceleration sensor, may be used.

[0033] The battery 61 and the first substrate 51 are connected by wiring (not shown). The battery 61 supplies power to the wireless communication unit 31 including the antenna 32, the first strain sensor 45, and the second strain sensor 48 through the electrically connected first substrate 51, second substrate 52, and third substrate 53. Note that, in the present embodiment, a case where a battery is used as the power supply source has been described, but the power supply source in the cutting tool of the present disclosure is not limited to a battery. The power supply source may be, for example, a battery built into the main body as in the present embodiment, a power supply module prepared separately from the cutting tool and connected to the cutting tool, or both. In addition, the battery 61 is preferably a rechargeable secondary battery, but may also be a primary battery.

[0034] (3) Details of the communication module structure FIG. 7 is a schematic cross-sectional view showing a state in which the communication module is accommodated in the first recess. FIG. 8 is a schematic plan view showing a state in which the communication module is accommodated in the first recess. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 8. Referring to FIGS. 3, 7 and 8, the main body 10 includes a first lower wall 111 which is the bottom of the first recess 11E, and a second lower wall 112 which is closer to the opening of the first recess 11E than the first lower wall 111. The first lower wall 111 and the second lower wall 112 constitute a wall surface that defines the first recess 11E. When the first recess 11E is viewed in the depth direction, the second lower wall 112 surrounds the first lower wall 111.

[0035] A resin spacer 21 is disposed on the first lower wall 111 as a resin layer. The spacer 21 constitutes the communication module 20. The spacer 21 has a flat plate shape. A first substrate 51 is disposed on the spacer 21. The first substrate 51 includes a first main surface 51A and a second main surface 52B located opposite the first main surface 51A in the thickness direction. The first substrate 51 is in contact with the spacer 21 at the first main surface 51A. The spacer 21 is in contact with the entire area of ​​the first main surface 51A, which is the main surface of the first substrate 51 facing the first lower wall 111. The spacer 21 is a resin layer disposed between the first substrate 51 and the first lower wall 111, which is the bottom of the first recess 11E. A wireless communication unit 31 including an antenna 32 is disposed on the second main surface 51B of the first substrate 51. In the above description, the resin spacer 21 is used as the resin layer. However, instead of the resin spacer 21, a resin double-sided tape 21 may be used.

[0036] 7, in the thickness direction (Z direction) of first substrate 51, distance d1 from antenna 32 to the opening of first recess 11E is equal to or less than distance d2 from antenna 32 to first lower wall 111 which is the bottom of first recess 11E. In this embodiment, distance d1 is smaller than distance d2.

[0037] (4) Lid installation status and lid structure 1 to 4, the turning tool 1 includes a first lid 71, a second lid 72, a third lid 73, and a fourth lid 74. The first lid 71 covers the first recess 11E. The second lid 72 covers the battery accommodating portion 11F. The third lid 73 covers the second recess 12E. The fourth lid 74 covers the third recess 13E. That is, the first lid 71, the second lid 72, the third lid 73, and the fourth lid 74 close the openings of the first recess 11E, the battery accommodating portion 11F, the second recess 12E, and the third recess 13E, respectively.

[0038] FIG. 9 is a schematic cross-sectional view showing the structure of the first lid. FIG. 9 is a cross-sectional view showing a state in which the first lid 71 is cut in the thickness direction (showing a cross section in the YZ plane). With reference to FIG. 1 and FIG. 9, the first lid 71 includes a metal base portion 71A having a window portion 71C penetrating the first lid 71 in the thickness direction (Z direction) of the first substrate 51, and a resin window member 71B sealing the window portion 71C. In the Z direction, the antenna 32 and the window portion 71C overlap. The first lid 71 is disposed on the second lower wall 112 and is housed in the first recess 11E. The material constituting the window portion 71C may be rubber or ceramic instead of resin.

[0039] 1 to 4, the main body 10 includes an annular step 113 along the outer edge of the battery accommodating section 11F when viewed in a plan view in the depth direction (Z direction) of the battery accommodating section 11F. The second lid 72 is disposed on the step 113 and is accommodated within the battery accommodating section 11F. The second lid 72 may be fixed to the main body 10 by, for example, a screw.

[0040] Furthermore, the main body 10 includes a first lower wall 121 that is the bottom of the second recess 12E, and a second lower wall 122 that is closer to the opening of the second recess 12E than the first lower wall 121. The first lower wall 121 and the second lower wall 122 form a wall surface that defines the second recess 12E. When the second recess 12E is viewed in the depth direction, the second lower wall 122 surrounds the first lower wall 121. The third lid 73 is disposed on the second lower wall 122 and is housed in the second recess 12E.

[0041] Further, referring to FIG. 2 and FIG. 4, the main body 10 includes a first lower wall 131 which is the bottom of the third recess 13E, and a second lower wall 132 which is closer to the opening of the third recess 13E than the first lower wall 131. The first lower wall 131 and the second lower wall 132 constitute a wall surface that defines the third recess 13E. When the third recess 13E is viewed in the depth direction, the second lower wall 132 surrounds the first lower wall 131. The fourth lid 74 is disposed on the second lower wall 132 and is housed in the third recess 13E. The first lid 71, the third lid 73, and the fourth lid 74 may be bonded to the main body 10.

[0042] (4) Operation of turning tool 1 to 4, during operation of the turning tool 1, the turning tool 1 processes the rotating workpiece by contacting the cutting tip 90 with the workpiece. At this time, the strain of the main body 10 is detected by the first strain sensor 45 and the second strain sensor 48. The signal including the information of the strain detected by the first strain sensor 45 and the second strain sensor 48 is an analog signal. The information of the strain, which is an analog signal, is converted into a digital signal by an AD converter (not shown), and then transmitted to the wireless communication unit 31 and transmitted to the outside from the antenna 32. Here, by adopting the first cover 71 having the window portion 71C into which the window member 71B is fitted, the signal is transmitted through the window portion 71C. This signal is received and analyzed outside, and the state of the main body 10 is grasped.

[0043] The turning tool 1 can be used by being fixed to the machine tool in various ways. For example, the turning tool 1 is fixed to a holding mechanism of the machine tool in the following manner. FIG. 10 is a schematic perspective view showing the structure of a turret. FIG. 11 is a schematic perspective view showing a state in which the turning tool is held by the turret. The turning tool 1 is held by the turret with the first lid 71, the second lid 72, and the third lid 73 attached, but in order to facilitate explanation, FIG. 11 shows a state in which the first lid 71, the second lid 72, and the third lid 73 are removed. Referring to FIG. 10, a groove 141 for holding the turning tool 1 is formed in a turret 140 as a holding mechanism included in a machine tool (not shown). The groove 141 is defined by a bottom wall 142 and a pair of side walls 143 rising from the bottom wall 142. Screw holes 145A and 145C are formed in the bottom wall 142. In this embodiment, a plurality of (two) screw holes 145A, 145C are formed. The screw holes 145A and 145C are arranged side by side along the extension direction of the groove 141. The turning tool 1 is fixed in the groove 141 of the turret 140 by using a first fixing member 150, a second fixing member 160 and screws 169A, 169C.

[0044] Specifically, the first fixing member 150 has a pair of end faces 155 having a trapezoidal shape, and a shape including a top face 151, a bottom face 152, a first side face 153, and a second side face 154 each having a rectangular shape and arranged perpendicular to the pair of end faces 155 so as to connect the pair of end faces 155. Of the parallel sides of the end face 155 having a trapezoidal shape, the side connected to the top face 151 is shorter than the side connected to the bottom face 152. The second fixing member 160 has a pair of end faces 165 having a trapezoidal shape, and a top face 161, a bottom face 162, a first side face 163, and a second side face 164 each having a rectangular shape and arranged perpendicular to the pair of end faces 165 so as to connect the pair of end faces 165. Of the parallel sides of the end face 165 having a trapezoidal shape, the side connected to the top face 161 is longer than the side connected to the bottom face 162. Second fixing member 160 has screw holes 165A, 165B, and 165C formed therein, penetrating from top surface 161 to bottom surface 162. Screw holes 165A and 165C are arranged side by side to correspond to screw holes 145A and 145C.

[0045] 10 and 11, the first fixing member 150 is disposed so that the bottom surface 152 contacts the bottom wall 142 of the turret 140 and the first side surface 153 contacts the side wall 143 of the turret 140. The turning tool 1 is disposed so that the third surface 13 contacts the bottom wall 142 of the turret 140 and the second surface 12 contacts the side wall 143 of the turret 140. The second fixing member 160 is disposed so that the first side surface 163 contacts the second side surface 154 of the first fixing member 150 and the second side surface 164 contacts the fourth surface 14 of the turning tool 1. The second fixing member 160 is disposed so that the bottom surface 162 faces the bottom wall 142 of the turret 140. Then, the screws 169A and 169C are arranged so as to pass through the screw holes 165A and 165C of the second fixing member 160, respectively, and to be inserted into the screw holes 145A and 145C of the turret 140. The screw 169B is inserted into the screw hole 165B of the second fixing member 160. By tightening the screws 169A and 169C, the distance between the bottom surface 162 of the second fixing member 160 and the bottom wall 142 of the turret 140 is reduced. In this way, the second fixing member 160 functions as a shim, and the turning tool 1 is firmly fixed to the turret 140. On the other hand, when the turning tool 1 is to be removed from the turret 140, the screw 169B is screwed into the screw hole 165B. The screw 169B passes through the screw hole 165B, and its tip contacts the bottom wall 142. When the screw 169B is further screwed in, the second fixing member 160 moves relative to the turret 140 so that the distance between the bottom surface 162 and the bottom wall 142 increases. This allows the second fixing member 160 to be easily removed. When the second fixing member 160 is removed, the turning tool 1 is released from the turret 140, and the turning tool 1 can be easily removed from the turret 140.

[0046] 11, the turning tool 1 having the main body 10 whose cross section perpendicular to the longitudinal direction is rectangular is held in a manner in which three surfaces (the second surface 12, the third surface 13, and the fourth surface 14) other than the first surface 11 corresponding to the lateral relief surface 90A of the cutting tip 90 among the outer peripheral surface of the main body 10 corresponding to the four sides of the rectangle come into contact with the turret 140 or the second fixing member 160. Therefore, by arranging the communication module 20 in the first recess 11E formed in the first surface 11, which is the surface corresponding to the lateral relief surface 90A of the cutting tip 90, a signal transmitted from the communication module 20 is transmitted to the outside without being blocked by the turret 140 and the second fixing member 160.

[0047] In addition, the battery accommodating section 11F, which is a space for accommodating the battery 61, is open on the first surface 11. This makes it easy to replace the battery 61 with the turning tool 1 fixed to the turret 140.

[0048] (5) Effects of this embodiment In the turning tool of this embodiment, the communication module 20 is accommodated in the first recess 11E of the metal body 10. In the thickness direction (Z direction) of the first substrate 51, the distance d1 from the antenna 32 to the opening of the first recess 11E is set to be smaller than the distance d2 from the antenna 32 to the bottom (first lower wall 111) of the first recess 11E. This sufficiently reduces the loss of information received by the receiver installed outside. As a result, the turning tool 1 of the present disclosure is a turning tool that can easily receive a signal including the information obtained by the first strain sensor 45 and the second strain sensor 48 at the receiver installed outside while suppressing the loss of the information. In addition, by arranging the resin spacer 21 or the double-sided tape 21 as a resin layer between the first substrate 51 and the first lower wall 111 of the first recess 11E, it is easy to set the distance d1 to be smaller than the distance d2.

[0049] (Embodiment 2) Next, another embodiment, embodiment 2, will be described. Fig. 12 is a schematic cross-sectional view showing a state in which the communication module in embodiment 2 is housed in the first recess. Fig. 12 is a view corresponding to Fig. 7 in embodiment 1. The turning tool 1 in embodiment 2 basically has the same structure as the turning tool 1 in embodiment 1, and achieves the same effects. However, with reference to Figs. 12 and 7, the turning tool 1 in embodiment 2 differs from the turning tool 1 in embodiment 1 in the structure of the communication module.

[0050] Specifically, in the communication module 20 of the turning tool 1 of the second embodiment, the spacer 21 (or the double-sided tape 21) as a resin layer is omitted. In the second embodiment, the thickness t1 of the first substrate 51 is equal to or greater than half the depth of the first recess 11E. With this configuration, the turning tool 1 of the present embodiment can reduce the number of parts, while easily setting the distance d1 from the antenna 32 to the opening of the first recess 11E to be smaller than the distance d2 from the antenna 32 to the bottom (first lower wall 111) of the first recess 11E.

[0051] (Embodiment 3) Next, a third embodiment, which is yet another embodiment, will be described. FIG. 13 is a schematic cross-sectional view showing a state in which a communication module in the third embodiment is accommodated in a first recess. FIG. 13 is a view corresponding to FIG. 7 in the first embodiment. FIG. 14 is a schematic perspective view showing a structure of a metal plate adopted in the third embodiment. The turning tool 1 in the third embodiment basically has the same structure as the turning tool 1 in the first embodiment, and achieves the same effects. However, referring to FIG. 13 and FIG. 7, the turning tool 1 in the third embodiment is different from the turning tool 1 in the first embodiment in the structure of the first recess 11E.

[0052] Referring to Figs. 13 and 14, the main body 10 of the turning tool 1 of the third embodiment includes a metal plate 18 that forms the bottom of the first recess 11E and has a notch 18C. The metal plate 18 has a first main surface 18A and a second main surface 18B that are located opposite each other in the thickness direction. The metal plate 18 has a quadrangular shape whose planar shape as viewed in the thickness direction (Z direction) corresponds to the planar shape of the first recess 11E as viewed in the Z direction. The notch 18C is formed in the metal plate 18 such that one corner of the quadrangle is removed. The metal plate 18 is disposed in the first recess 11E such that the second main surface 18B of the metal plate 18 is opposite to the opening of the first recess 11E. As a result, the first main surface 18A of the metal plate 18 forms the first lower wall 111 that is the bottom of the first recess 11E, and the region corresponding to the notch 18C becomes the deep region 11G.

[0053] With this configuration, the first recess 11E of the third embodiment is spaced apart from the opening by a distance d 31 The depth is larger than that of other regions (distance from the opening 32 The first substrate 51 includes a deep region 11G having an opening 11E extending from the antenna 32 toward the opening 11E of the first recess 11E. The antenna 32 and the deep region 11G overlap in the thickness direction (Z direction) of the first substrate 51. With this configuration, the turning tool 1 of the third embodiment can easily set the distance d1 from the antenna 32 to the opening of the first recess 11E to be smaller than the distance d2 from the antenna 32 to the bottom of the first recess 11E while maintaining a high rigidity of the main body 10.

[0054] (Embodiment 4) Next, a fourth embodiment, which is yet another embodiment, will be described. Fig. 15 is a schematic perspective view showing the structure of a cutting tool in the fourth embodiment. Fig. 15 is a view corresponding to Fig. 1 of the first embodiment. The turning tool 1 in the fourth embodiment basically has the same structure as the turning tool 1 in the first embodiment, and achieves the same effects. However, referring to Figs. 15 and 1, the turning tool 1 in the fourth embodiment is different from the turning tool 1 in the first embodiment in the structure of the first lid 71.

[0055] 15, the first lid 71 of the turning tool 1 of the fourth embodiment is made of resin, rubber, or ceramic. The window member 71B is omitted from the first lid 71 of the turning tool 1 of the fourth embodiment. In this manner, by adopting a nonmetal as the material of the first lid 71, the turning tool 1 of the present embodiment can omit the window member 71B and transmit a signal transmitted from the communication module 20 to the outside while suppressing loss of information obtained by the first strain sensor 45 and the second strain sensor 48.

[0056] (Embodiment 5) Next, a fifth embodiment, which is yet another embodiment, will be described. FIG. 16 is a schematic cross-sectional view showing a state in which a communication module in the fifth embodiment is housed in the first recess. FIG. 16 is a view corresponding to FIG. 7 of the first embodiment. The turning tool 1 in the fifth embodiment basically has the same structure as the turning tool 1 in the first embodiment, and achieves the same effects. However, referring to FIG. 16 and FIG. 7, the turning tool 1 in the fifth embodiment is different from the turning tool 1 in the first embodiment in the internal structure of the first recess 11E.

[0057] Specifically, the first recess 11E of the turning tool 1 of the fifth embodiment is filled with a resin filler 26, and the communication module 20 is sealed with the filler 26. This makes it possible to more reliably protect the communication module 20 in the present embodiment. In addition, the filler 26 can adjust the resonance frequency of the antenna 32.

[0058] (Embodiment 6) Next, a sixth embodiment, which is yet another embodiment, will be described. FIG. 17 is a schematic cross-sectional view showing a state in which the communication module in the sixth embodiment is accommodated in the first recess. FIG. 18 is a schematic cross-sectional view showing a state in which the communication module in the sixth embodiment is accommodated in the first recess, in a cross section different from that in FIG. 17. FIG. 19 is a schematic plan view showing a state in which the communication module in the sixth embodiment is accommodated in the first recess. FIG. 17 and FIG. 19 correspond to FIG. 7 and FIG. 8 of the first embodiment, respectively. The turning tool 1 in the sixth embodiment basically has the same structure as the turning tool 1 in the first embodiment, and achieves the same effect. However, referring to FIG. 17 to FIG. 19 and FIG. 7 to FIG. 8, the turning tool 1 in the sixth embodiment is different from the turning tool 1 in the first embodiment in the structure of the spacer 21.

[0059] 17 to 19, the spacer 21 of the turning tool 1 of the sixth embodiment includes a bottom wall portion 211 located between the first substrate 51 and the first lower wall 111 which is the bottom of the first recess 11E, and a side wall portion 212 which rises from the bottom wall portion 211 and contacts the outer peripheral surface of the first substrate 51 to restrict the movement of the first substrate 51. The side wall portion 212 is formed so as to surround the first space 21A which is the space above the bottom wall portion 211. In the Z direction, the height of the side wall portion 212 from the bottom wall portion 211 is larger than the thickness of the first substrate 51. From another perspective, the distance from the side wall portion 212 to the opening of the first recess 11E is smaller than the distance from the first substrate 51 to the opening of the first recess 11E.

[0060] 19, the first lower wall 111 of the first recess 11E has a quadrangular (rectangular) shape as viewed in the Z direction, more specifically, a quadrangular (rectangular) shape in which adjacent sides are connected at corners by arc-shaped curves. The spacer 21 has a quadrangular (rectangular) shape corresponding to the first lower wall 111 (slightly smaller than the first lower wall 111) as viewed in the Z direction, more specifically, a quadrangular (rectangular) shape in which adjacent sides are connected at corners by arc-shaped curves. The spacer 21 is disposed such that four sides corresponding to the outer circumferential surface are in contact with four side walls of the main body 10 surrounding the first recess 11E (side walls corresponding to the four sides of the rectangular first lower wall 111). The spacer 21 is fitted into the first recess 11E.

[0061] The first space 21A has a square (rectangular) shape when viewed in the Z direction. The first board 51 has a square (rectangular) shape corresponding to the first space 21A (slightly smaller than the first space 21A) when viewed in the Z direction. The first board 51 is fitted into the first space 21A. The first board 51 is restricted in movement by contacting a side wall portion 212 surrounding the first space 21A. The first board 51 is positioned by the spacer 21. The side wall portion 212 includes a notch portion 213 having a smaller height in the Z direction than other regions. The notch portion 213 is formed at a position corresponding to the first through hole 10D. The flexible cable 54 connected to the connector 33 passes through the notch portion 213 and enters the first through hole 10D.

[0062] When assembling the turning tool 1 of this embodiment, the first substrate 51 is fitted into the first space 21A of the spacer 21, and its movement is restricted by the side wall portion 212. This achieves positioning of the first substrate 51 relative to the spacer 21. Furthermore, by fitting the spacer 21 into the first recess 11E, the spacer 21 is positioned relative to the first recess 11E of the main body portion 10. As a result, in this embodiment, it is easy to arrange the antenna 32 included in the wireless communication unit 31 arranged on the first substrate 51 at an appropriate position.

[0063] It should be understood that the embodiments disclosed herein are illustrative in all respects and are not limiting in any respect. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0064] 1 turning tool, 10 main body, 10A first end, 10B second end, 10D first through hole, 10H second through hole, 11 first surface, 11A first region, 11B second region, 11C third region, 11E first recess, 11F battery storage section, 11G deep region, 12 second surface, 12E second recess, 13 third surface, 13E third recess, 14 fourth surface, 15 fifth surface, 16 sixth surface, 18 metal plate, 18A first main surface, 18B second main surface, 18C notch, 19 holding section, 20 communication module, 21 spacer (double-sided tape), 21A first space, 26 filling material, 31 wireless communication section, 32 antenna, 33 to 38 connector, 44 First strain sensor component, 45 First strain sensor, 46 Wiring, 47 Second strain sensor component, 48 Second strain sensor, 49 Wiring, 51 First substrate, 51A First main surface, 51B Second main surface, 52 Second substrate, 52B Second main surface, 53 Third substrate, 54, 55 Flexible cable, 61 Battery, 71 First lid, 71A Base portion, 71B Window member, 71C Window portion, 72 Second lid, 73 Third lid, 74 Fourth lid, 81 Base plate, 82 Fixing portion, 90 Cutting tip, 90A, 90B Relief surface, 111 First bottom wall, 112 Second bottom wall, 113 Step portion, 121 First bottom wall, 122 Second bottom wall, 131 First bottom wall, 132 Second bottom wall, 140 Turret, 141 groove, 142 bottom wall, 143 side wall, 145A, 145C screw hole, 150 first fixing member, 151 top surface, 152 bottom surface, 153 first side surface, 154 second side surface, 155 end surface, 160 second fixing member, 161 top surface, 162 bottom surface, 163 first side surface, 164 second side surface, 165 end surface, 165A, 165B, 165C screw hole, 169A, 169B, 169C screw, 211 bottom wall portion, 212 side wall portion, 213 notch portion, d1, d2, d 31 ,d 32 Distance, t1 thickness.

Claims

1. A turning tool for cutting a workpiece by contacting the rotating workpiece, comprising: a metal body portion having a recess formed on its surface; a sensor installed on the body portion for detecting a first physical quantity of the body portion; a communication module housed in the recess for transmitting information including the first physical quantity detected by the sensor to the outside; The communication module includes: a resin substrate; a wireless communication portion disposed on the substrate and including an antenna; a resin layer disposed between the substrate and the bottom of the recess for fixing the substrate in the recess, the turning tool.

2. The turning tool according to claim 1, wherein the resin layer has a thickness such that a distance from the antenna to the bottom of the recess is greater than a distance from the antenna to the opening of the recess in a thickness direction of the substrate.

3. The turning tool according to claim 1, wherein the resin layer contacts an entire area of a first main surface which is a main surface of the substrate facing the bottom of the recess.

4. The turning tool according to claim 1, wherein the resin layer includes a resin spacer.

5. The turning tool according to claim 4, wherein the spacer has a flat plate shape.

6. The turning tool further includes a lid for closing an opening of the recess, The lid includes a metal base portion having a window portion penetrating the lid in a thickness direction of the substrate, a resin window member for sealing the window portion, the turning tool according to claim 1.

7. The turning tool according to claim 6, wherein the antenna and the window portion overlap in a thickness direction of the substrate.

8. The turning tool according to claim 1, further comprising a lid made of resin, rubber or ceramic for closing an opening of the recess.

9. The turning tool according to any one of claims 1 to 8, wherein the recess is filled with a resin filler, and the communication module is sealed by the filler.

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