Turning tool

Abstract

This turning tool holds a cutting tip. The turning tool includes a body part, a sensor, a first terminal, a first lid, and a second lid. The body part includes a first body region and a second body region. In the first body region, the cutting tip is attached. The second body region is continuous with the first body region. In the second body region, a recess is provided. The sensor is attached to the body part. The first terminal is electrically connected to the sensor. The first terminal is disposed in the recess. The first lid can be attached to the second body region to cover the recess. The second lid includes a connector. The connector can be electrically connected to the first terminal. The second lid can be attached to the second body region to cover the recess. When the first lid is attached to the second body region, the second body region and the first lid form an internal space. The internal space houses a battery that can be electrically connected to the first terminal. The first lid and the second lid can be replaced with each other.

Description

Turning Tools

[0001] The present disclosure relates to turning tools.

[0002] As an example of a cutting tool that cuts a rotating workpiece by contacting the workpiece, International Publication No. 2022 / 230149 (Patent Document 1) describes a cutting tool having a main body, a sensor, and a battery. In this cutting tool, the battery is electrically connected to the sensor. The battery is disposed within the main body.

[0003] International Publication No. 2022 / 230149

[0004] A turning tool according to the present disclosure holds a cutting tip. The turning tool includes a body portion, a sensor, a first terminal, a first lid, and a second lid. The body portion includes a first body region and a second body region. The cutting tip is attached to the first body region. The second body region is continuous with the first body region. A recess is provided in the second body region. The sensor is attached to the body portion. The first terminal is electrically connected to the sensor. The first terminal is disposed in the recess. The first lid is attachable to the second body region to cover the recess. The second lid includes a connector. The connector is electrically connectable to the first terminal. The second lid is attachable to the second body region to cover the recess. When the first lid is attached to the second body region, the second body region and the first lid form an internal space. The internal space houses a battery that is electrically connectable to the first terminal. The first lid and the second lid are interchangeable.

[0005] FIG. 1 is a schematic perspective view showing the configuration of a turning tool according to a first embodiment. FIG. 2 is a first schematic perspective view showing the configuration of the turning tool with the lid removed. FIG. 3 is a second schematic perspective view showing the configuration of the turning tool with the lid removed. FIG. 4 is a schematic plan view showing the configuration of the turning tool with the lid removed. FIG. 5 is a schematic cross-sectional view taken along line V-V in FIG. 4. FIG. 6 is a schematic cross-sectional view taken along line VI-VI in FIG. 4. FIG. 7 is a schematic side view showing the configuration of the first lid. FIG. 8 is a schematic plan view showing the first lid attached to the second main body region. FIG. 9 is an enlarged schematic cross-sectional view taken along line IX-IX in FIG. 8. FIG. 10 is a schematic plan view showing the configuration of the second lid. FIG. 11 is a schematic cross-sectional view taken along line XI-XI in FIG. 10. FIG. 12 is a schematic plan view showing the second lid attached to the second main body region. Fig. 13 is a schematic cross-sectional view taken along line XIII-XIII in Fig. 12. Fig. 14 is an enlarged schematic cross-sectional view showing the configuration of a turning tool according to a second embodiment.

[0006] [Problem to be Solved by the Present Disclosure] In the cutting tool described in Patent Document 1, the operational time of the sensor is determined by the discharge capacity of the battery. Therefore, when the sensor is operated continuously for a relatively long period of time, the discharge capacity of the battery may become insufficient.

[0007] An object of the present disclosure is to provide a turning tool that can switch between supplying power to a sensor from a battery and supplying power to a sensor from an external power source.

[0008] Effect of the Present Disclosure According to the present disclosure, it is possible to provide a turning tool that is capable of switching between supplying power to a sensor from a battery and supplying power to a sensor from an external power source.

[0009] [Outline of the embodiment] First, an outline of the embodiment of the present disclosure will be described.

[0010] (1) A turning tool according to the present disclosure holds a cutting tip. The turning tool has a main body, a sensor, a first terminal, a first lid, and a second lid. The main body has a first body region and a second body region. The cutting tip is attached to the first body region. The second body region is continuous with the first body region. A recess is provided in the second body region. The sensor is attached to the main body. The first terminal is electrically connected to the sensor. The first terminal is disposed in the recess. The first lid is attachable to the second body region to cover the recess. The second lid has a second terminal. The second terminal is electrically connectable to the first terminal. The second lid is attachable to the second body region to cover the recess. When the first lid is attached to the second body region, the second body region and the first lid form an internal space. The internal space houses a battery that is electrically connectable to the first terminal. The first lid and the second lid are interchangeable.

[0011] According to the turning tool of the present disclosure, by interchanging the first lid and the second lid, it is possible to switch between supplying power to the sensor from the battery and supplying power to the sensor from an external power source.

[0012] (2) According to the turning tool of (1) above, the second body region may have a rear end surface and an outer surface. The rear end surface may be opposite to the first body region. The outer surface may be continuous with the rear end surface. A recess may be provided in the outer surface. This allows the length of the portion of the turning tool that protrudes from the machine tool to be shortened when the turning tool is attached to the machine tool.

[0013] (3) According to the turning tool of (2), the first body region may have a seating surface. The seating surface may support the cutting tip. The sensor may be provided between the seating surface and the recess in a direction from the first body region toward the rear end surface. This can improve the sensitivity of the sensor to changes in physical quantities caused by contact between the cutting tip and the workpiece.

[0014] (4) According to the turning tool of (2) or (3), the second cover may have a support portion. The support portion may support a connector. The support portion may be attached to the second body region. The connector may have a second terminal and a third terminal. The third terminal may be electrically connected to the second terminal. When the second cover is attached to the second body region, the second terminal may be exposed to the outside of the turning tool, and the third terminal may be disposed between the support portion and a bottom surface of the recess. In a direction from the first body region toward the rear end surface, the second terminal may be disposed between the rear end surface and the center of the recess. This prevents a cable connecting the external power source and the connector from coming into contact with chips and cutting oil.

[0015] (5) In the turning tool according to any one of (2) to (4) above, the recess may be provided on the outer surface corresponding to the main flank of the cutting tip, thereby preventing a cable connecting the external power supply and the connector from coming into contact with the machine tool.

[0016] (6) The turning tool according to any one of (1) to (5) above may further include a wireless communication unit. The wireless communication unit may be electrically connected to the sensor. The wireless communication unit may transmit a signal received from the sensor to the outside. This allows the information detected by the sensor to be obtained even while the workpiece is being turned.

[0017] [Details of the embodiment] Hereinafter, details of the embodiment of the present disclosure (hereinafter also referred to as the present embodiment) will be described with reference to the drawings. Note that the same or corresponding parts in the following drawings are designated by the same reference numerals, and description thereof will not be repeated.

[0018] First Embodiment First, the configuration of a turning tool 100 according to the first embodiment will be described. FIG. 1 is a schematic perspective view showing the configuration of the turning tool 100 according to the first embodiment. As shown in FIG. 1, the turning tool 100 mainly includes a main body 5, a first terminal 56, a first lid 1, a second lid 2, a third lid 3, and a fourth lid 4. The turning tool 100 holds a cutting tip 90 and a base plate 94. The turning tool 100 turns a rotating workpiece (not shown) by bringing the cutting tip 90 into contact with the workpiece. The turning tool 100 is part of a cutting tool. The turning tool 100, the cutting tip 90, and the base plate 94 constitute the cutting tool.

[0019] The main body 5 is a portion that supports the cutting tip 90 and the base plate 94. A first recess 81 is provided in the main body 5. The first terminal 56 is disposed in the first recess 81. The first terminal 56 is a portion that is electrically connected to either a battery or an external power source.

[0020] The first lid 1 can be attached to the main body 5 so as to cover the first recess 81. Similarly, the second lid 2 can be attached to the main body 5 so as to cover the first recess 81. The first lid 1 and the second lid 2 are interchangeable. The specific configurations of the first lid 1 and the second lid 2 will be described later. The third lid 3 is attached to the main body 5. The third lid 3 has a flat plate shape, for example. The fourth lid 4 is attached to the main body 5. The fourth lid 4 has a flat plate shape, for example.

[0021] Fig. 2 is a first perspective schematic view showing the configuration of the turning tool 100 with the lid removed. Fig. 3 is a second perspective schematic view showing the configuration of the turning tool 100 with the lid removed. Fig. 4 is a plan schematic view showing the configuration of the turning tool 100 with the lid removed. Figs. 2 to 4 show the turning tool 100 with the third lid 3 and the fourth lid 4 removed. For ease of explanation, the first lid 1 and the second lid 2 are not shown in Figs. 2 to 4.

[0022] 2 to 4 , the main body portion 5 has a first main body region 10 and a second main body region 20. A cutting tip 90 is attached to the first main body region 10. The first main body region 10 has a bearing surface 15, a first surface 11, a second surface 12, a third surface 13, a fourth surface 14, and a fifth surface 35.

[0023] The seating surface 15 is a surface that supports the cutting tip 90. The seating surface 15 has a first seating surface portion 16 and a second seating surface portion 17. The first seating surface portion 16 is a surface on which the base plate 94 is placed. The second seating surface portion 17 is continuous with the first seating surface portion 16. The second seating surface portion 17 may be substantially perpendicular to the first seating surface portion 16. The second seating surface portion 17 is a surface that contacts each of the cutting tip 90 and the base plate 94.

[0024] 2 to 4, the first surface 11 is continuous with the first seating surface portion 16 and the second seating surface portion 17. The second surface 12 is continuous with the first surface 11, the first seating surface portion 16, and the second seating surface portion 17. The first surface 11, the second surface 12, and the first seating surface portion 16 form a corner 18. The corner 18 is located at the front end of the main body portion 5. A cutting tip 90 is disposed at the corner 18.

[0025] The third surface 13 is continuous with each of the first surface 11, the second surface 12, and the second seating surface portion 17. The fourth surface 14 is continuous with each of the first surface 11 and the second surface 12. The fourth surface 14 is located opposite the third surface 13. The fifth surface 35 is continuous with each of the second surface 12 and the third surface 13. The fifth surface 35 is located opposite the first surface 11.

[0026] As shown in Fig. 3, the turning tool 100 has a fixing portion 6 and a fastening screw 7. The fixing portion 6 is provided on the third surface 13. The fixing portion 6 fixes the cutting tip 90 and the bottom plate 94. Specifically, the cutting tip 90 and the bottom plate 94 are sandwiched between the fixing portion 6 and the first body region 10, thereby fixing the cutting tip 90 and the bottom plate 94. The fastening screw 7 fastens the fixing portion 6 and the first body region 10 together.

[0027] 2 to 4 , the second body region 20 is continuous with the first body region 10. The second body region 20 is held, for example, by a machine tool (not shown). Specifically, the second body region 20 is held, for example, by a turret of the machine tool. In other words, the second body region 20 is a shank. A first recess 81 is provided in the second body region 20.

[0028] The second body region 20 has a rear end surface 21 and an outer surface 22. The rear end surface 21 is opposite the first body region 10. In the turning tool 100, the rear end surface 21 is opposite the corner 18. The direction from the first body region 10 toward the rear end surface 21 is defined as a longitudinal direction 110. The rear end surface 21 extends along a plane perpendicular to the longitudinal direction 110. The shape of the rear end surface 21 is, for example, rectangular.

[0029] 2 to 4 , the outer surface 22 is continuous with the rear end surface 21. The outer surface 22 extends along the longitudinal direction 110. The outer surface 22 is annular. A first recess 81, a second recess 82, a third recess 83, and a fourth recess 84 are provided in the outer surface 22. The outer surface 22 has a first side surface portion 31, a second side surface portion 32, a third side surface portion 33, and a fourth side surface portion 34.

[0030] The third side surface portion 33 is opposite the first side surface portion 31. The direction from the third side surface portion 33 toward the first side surface portion 31 is defined as a first direction 101. The first direction 101 is perpendicular to the longitudinal direction 110. The first direction 101 is the same as the feed direction of the turning tool 100 when, for example, externally turning a workpiece from its end face. The fourth side surface portion 34 is opposite the second side surface portion 32. The direction from the second side surface portion 32 toward the fourth side surface portion 34 is defined as a second direction 102. The second direction 102 is perpendicular to both the first direction 101 and the longitudinal direction 110.

[0031] The first side surface portion 31 is flat. The first side surface portion 31 faces a first direction 101. A main flank surface 91 of the cutting tip 90 is positioned in the first direction 101 relative to the first side surface portion 31. A first recess 81 and a second recess 82 are provided in the first side surface portion 31. The first recess 81 opens in the first direction 101. The third cover 3 (see FIG. 1 ) is attached to the second body region 20 so as to cover the second recess 82. FIG. 4 shows the configuration of the turning tool 100 when viewed perpendicular to the first side surface portion 31.

[0032] Within the outer surface 22, the first side surface portion 31 is a surface that corresponds to the main flank 91 of the cutting tip 90. From another perspective, the first recess 81 is provided on a surface within the outer surface 22 that corresponds to the main flank 91 of the cutting tip 90. The main flank 91 is a flank that continues to the main cutting edge of the cutting tip 90. The main cutting edge is a cutting edge that comes into contact with the workpiece.

[0033] The second side surface portion 32 may be substantially perpendicular to the first side surface portion 31. The second side surface portion 32 is continuous with the fourth surface 14. The second side surface portion 32 and the fourth surface 14 may be substantially on the same plane. The second side surface portion 32 is planar. A third recess 83 is provided in the second side surface portion 32. The fourth cover 4 (see FIG. 1 ) is attached to the second main body region 20 so as to cover the third recess 83.

[0034] The third side surface portion 33 may be substantially parallel to the first side surface portion 31. The third side surface portion 33 is continuous with the fifth surface 35. The third side surface portion 33 and the fifth surface 35 may be substantially on the same plane. The third side surface portion 33 is planar. A fourth recess 84 is provided in the third side surface portion 33. A fifth lid (not shown) may be attached to the second main body region 20 so as to cover the fourth recess 84. The fourth side surface portion 34 is planar. The fourth side surface portion 34 may be substantially parallel to the second side surface portion 32.

[0035] 2 , the turning tool 100 has, for example, a first sensor 61, a first substrate 71, a second substrate 72, a first wiring 76, and a second wiring 77. The first sensor 61 is attached to the main body portion 5. Specifically, the first sensor 61 is attached to, for example, the second main body region 20. The first sensor 61 is disposed in the third recess 83.

[0036] In the longitudinal direction 110, the first sensor 61 is provided between the seat surface 15 (see FIG. 3 ) and the first recess 81. In the longitudinal direction 110, the first recess 81 is provided between the first sensor 61 and the rear end surface 21. The first sensor 61 is a sensor that detects a physical quantity of the main body 5. Specifically, the first sensor 61 is, for example, a strain sensor. The first sensor 61 detects the main body 5 in, for example, the second direction 102.

[0037] The first substrate 71 is disposed in the third recess 83. The first substrate 71 is attached to the second body region 20. The first wiring 76 electrically connects the first sensor 61 and the first substrate 71. The second substrate 72 is disposed in the second recess 82. The second substrate 72 is attached to the second body region 20.

[0038] 3 , the turning tool 100 has a second sensor 62, a third substrate 73, and a third wiring 78. The second sensor 62 is disposed in a fourth recess 84. The second sensor 62 is attached to the main body portion 5. Specifically, the second sensor 62 is attached to the second main body region 20, for example.

[0039] The second sensor 62 is provided between the seat surface 15 and the first recess 81 (see FIG. 2 ) in the longitudinal direction 110. The second sensor 62 is a sensor that detects a physical quantity of the main body 5. Specifically, the second sensor 62 is, for example, a strain sensor. The second sensor 62 detects, for example, the strain of the main body 5 in the first direction 101.

[0040] The third substrate 73 is disposed in the fourth recess 84. The third substrate 73 is attached to the second body region 20. The fourth wiring 79 electrically connects the second sensor 62 and the third substrate 73.

[0041] 2, the turning tool 100 has an AD converter 66 and a wireless communication unit 67. The AD converter 66 is provided on a second substrate 72. The wireless communication unit 67 is provided on the second substrate 72. The second substrate 72 electrically connects the AD converter 66 and the wireless communication unit 67. The AD converter 66 converts an analog signal into a digital signal. The wireless communication unit 67 transmits signals received from the first sensor 61 and the second sensor 62 to the outside.

[0042] Figure 5 is a schematic cross-sectional view taken along line V-V in Figure 4. The cross section shown in Figure 5 is perpendicular to the longitudinal direction 110 and intersects with each of the third wiring 78 and the fourth wiring 79. As shown in Figure 5, a first connecting passage 68 and a second connecting passage 69 are provided in the second body region 20. The second recess 82 communicates with the third recess 83 via the first connecting passage 68. The second recess 82 communicates with the fourth recess 84 via the second connecting passage 69.

[0043] The second wiring 77 is disposed in the first connection passage 68. The second wiring 77 electrically connects the first substrate 71 and the second substrate 72. From another perspective, the first sensor 61 (see FIG. 2) is electrically connected to each of the AD converter 66 (see FIG. 2) and the wireless communication unit 67 (see FIG. 2) via the first wiring 76 (see FIG. 2), the first substrate 71, the second wiring 77, and the second substrate 72. The second wiring 77 is, for example, a flexible cable.

[0044] The third wiring 78 is disposed within the second connection passage 69. The third wiring 78 electrically connects the third board 73 and the first board 71. From another perspective, the second sensor 62 (see FIG. 3) is electrically connected to each of the AD converter 66 and the wireless communication unit 67 via the fourth wiring 79 (see FIG. 3), the third board 73, the third wiring 78, the second board 72, the second wiring 77, and the first board 71. The third wiring 78 is, for example, a flexible cable.

[0045] Fig. 6 is a schematic cross-sectional view taken along line VI-VI in Fig. 4. The cross section shown in Fig. 6 is parallel to the longitudinal direction 110 and intersects with the first terminal 56. As shown in Figs. 4 and 6, the second body region 20 has a first inner wall surface 24, a support surface 26, a second inner wall surface 25, and a first bottom surface 23.

[0046] The first inner wall surface 24 is continuous with the first side surface portion 31. The first inner wall surface 24 is annular. The first inner wall surface 24 may be substantially parallel to the first direction 101. The support surface 26 is continuous with the first inner wall surface 24. The support surface 26 may be substantially parallel to the first side surface portion 31. A screw hole 88 is provided in the support surface 26.

[0047] The second inner wall surface 25 is continuous with the support surface 26. The second inner wall surface 25 is annular. The second inner wall surface 25 may be substantially parallel to the first direction 101. When viewed perpendicularly to the first side surface portion 31, the second inner wall surface 25 may be surrounded by the first inner wall surface 24. When viewed perpendicularly to the first side surface portion 31, the second inner wall surface 25 surrounds the first terminal 56. When viewed perpendicularly to the first side surface portion 31, the center of the second inner wall surface 25 is set to the center O of the first recess 81.

[0048] The first bottom surface 23 is continuous with the second inner wall surface 25. The first bottom surface 23 may be substantially parallel to the first side surface portion 31. The first inner wall surface 24, the support surface 26, the second inner wall surface 25, and the first bottom surface 23 form a first recess 81.

[0049] 6 , a third connecting passage 70 is provided in the second body region 20. The first recess 81 communicates with the second recess 82 via the third connecting passage 70. The third connecting passage 70 opens at the second inner wall surface 25. The boundary surface 27 between the second body region 20 and the first body region 10 is located opposite the rear end surface 21. The longitudinal direction 110 is the same as the direction from the boundary surface 27 toward the rear end surface 21.

[0050] As shown in Fig. 6 , the turning tool 100 has a fifth wiring 80. The fifth wiring 80 is disposed in the third connection passage 70. The fifth wiring 80 electrically connects the first terminal 56 and the second substrate 72. From another perspective, the first terminal 56 is electrically connected to each of the first sensor 61 (see Fig. 2 ), the second sensor 62 (see Fig. 3 ), the AD converter 66, and the wireless communication unit 67.

[0051] (First Lid) Next, the configuration of the first lid 1 will be described. Fig. 7 is a side view showing the configuration of the first lid 1. As shown in Figs. 1 and 7, the first lid 1 has a flat plate shape. The first lid 1 has a first flat surface 41, a second flat surface 42, and a first outer peripheral surface 45.

[0052] The second plane 42 is opposite the first plane 41. The second plane 42 may be substantially parallel to the first plane 41. The first outer peripheral surface 45 is continuous with each of the first plane 41 and the second plane 42. The first outer peripheral surface 45 is annular. A plurality of first through holes 19 are provided in the first lid 1. Each of the plurality of first through holes 19 penetrates between the first plane 41 and the second plane 42.

[0053] FIG. 8 is a schematic plan view showing the state in which the first lid 1 is attached to the second main body region 20. FIG. 9 is an enlarged schematic cross-sectional view taken along line IX-IX in FIG. 8. As shown in FIGS. 8 and 9, the first lid 1 is disposed on the support surface 26. When the first lid 1 is attached to the second main body region 20, for example, the second flat surface 42 is in contact with the support surface 26. The first outer peripheral surface 45 may be in contact with the first inner wall surface 24. For example, the first lid 1 and the main body 5 are fastened together by a screw (not shown) that passes through the first through hole 19 and is screwed into the screw hole 88.

[0054] When the first cover 1 is attached to the second body region 20, the second body region 20 and the first cover 1 form a first internal space 86. Specifically, the first internal space 86 is formed by the second flat surface 42, the second inner wall surface 25, and the first bottom surface 23. The first internal space 86 accommodates a battery 95. The first internal space 86 communicates with the second recess 82 (see FIG. 6) via the third connecting passage 70 (see FIG. 6). The battery 95 can be electrically connected to the first terminal 56. Specifically, the battery 95 and the first terminal 56 are electrically connected by, for example, a connecting wire 96. The connecting wire 96 is detachable from both the battery 95 and the first terminal 56. From another perspective, the battery 95 can be electrically disconnected from the first terminal 56.

[0055] (Second Lid) Next, the configuration of the second lid 2 will be described. Fig. 10 is a schematic plan view showing the configuration of the second lid 2. Fig. 11 is a schematic cross-sectional view taken along line XI-XI in Fig. 10. As shown in Figs. 10 and 11, the second lid 2 has a support portion 38 and a connector 39. The support portion 38 has a plate portion 51 and a protrusion 52. The plate portion 51 has a third flat surface 43, a fourth flat surface 44, and a second outer circumferential surface 46.

[0056] The fourth plane 44 is opposite the third plane 43. The direction from the third plane 43 to the fourth plane 44 is defined as a third direction 103. The fourth plane 44 may be substantially parallel to the third plane 43. The second outer peripheral surface 46 is continuous with each of the third plane 43 and the fourth plane 44. The second outer peripheral surface 46 is annular. The shape of the second outer peripheral surface 46 may be substantially the same as the shape of the first outer peripheral surface 45 of the first lid 1 (see FIGS. 1 and 7 ).

[0057] A plurality of second through holes 29 are provided in the support portion 38. Each of the plurality of second through holes 29 penetrates the third plane 43 and the fourth plane 44. The distance between each of the plurality of second through holes 29 when viewed along the third direction 103 may be substantially the same as the distance between each of the plurality of first through holes 19 when viewed perpendicular to the first plane 41 of the first lid 1. A convex portion 52 is provided in the fourth plane 44. The convex portion 52 is convex in the third direction 103.

[0058] A fifth recess 85 is provided in the support portion 38. The fifth recess 85 is formed by a plate portion 51 and a protrusion 52. The support portion 38 has a third inner wall surface 47, a second bottom surface 48, and an inner circumferential surface 50. The third inner wall surface 47 is continuous with the third plane 43. The third inner wall surface 47 extends along the third direction 103. The second bottom surface 48 is continuous with the third inner wall surface 47. The second bottom surface 48 may be substantially parallel to the third plane 43. The third inner wall surface 47 and the second bottom surface 48 form the fifth recess 85. The inner circumferential surface 50 is continuous with the second bottom surface 48. The inner circumferential surface 50 is annular. The inner circumferential surface 50 extends along the third direction 103.

[0059] As shown in Figures 10 and 11 , the connector 39 is supported by the support portion 38. Specifically, the connector 39 is supported by the second bottom surface 48 and the inner circumferential surface 50. A portion of the connector 39 is located within the fifth recess 85. The connector 39 is located in the third direction 103 relative to the third plane 43. The connector 39 is surrounded by the third inner wall surface 47. The connector 39 is arranged on the second bottom surface 48. The connector 39 penetrates the protrusion 52. The connector 39 is a portion to which the cable 9 is connected. The connector 39 is a portion that is electrically connected to an external power source (not shown) via the cable 9.

[0060] 10 and 11 , the connector 39 has a housing 53, a second terminal 57, a third terminal 58, a fourth terminal 59, and a fifth terminal (not shown). The housing 53 is attached to the support portion 38. The housing 53 supports the cable 9 connected to the connector 39. The housing 53 is fitted with, for example, the cable 9. The housing 53 is formed, for example, from an electrically insulating material.

[0061] The second terminal 57 extends from the housing 53 in a direction opposite to the third direction 103. Specifically, the housing 53 is supported by the second bottom surface 48 and the inner circumferential surface 50. The second terminal 57 is supported by the housing 53. In the third direction 103, the second terminal 57 is provided between the third plane 43 and the second bottom surface 48. The second terminal 57 is a conductor. The shape of the second terminal 57 is, for example, rod-like. The second terminal 57 is a portion to which the cable 9 is connected.

[0062] The third terminal 58 is opposite the second terminal 57. The third terminal 58 is electrically connected to the second terminal 57. The third terminal 58 is provided in the third direction 103 with respect to the support portion 38. The third terminal 58 extends, for example, from the housing 53 along the third direction 103. The third terminal 58 is supported by the housing 53. The third terminal 58 is electrically connectable to the first terminal 56. The third terminal 58 is a conductor. The third terminal 58 has, for example, a rod-like shape.

[0063] The fourth terminal 59 has substantially the same configuration as the second terminal 57. The fourth terminal 59 is electrically insulated from each of the second terminal 57 and the third terminal 58 by the housing 53. The fifth terminal (not shown) has substantially the same configuration as the third terminal 58. The fifth terminal is electrically connected to the fourth terminal 59.

[0064] Fig. 12 is a schematic plan view showing a state in which the second lid 2 is attached to the second main body region 20. Fig. 13 is a schematic cross-sectional view taken along line XIII-XIII in Fig. 12. As shown in Figs. 12 and 13, the second lid 2 is placed on the support surface 26. When the second lid 2 is attached to the second main body region 20, the fourth flat surface 44 contacts the support surface 26. The second outer peripheral surface 46 may contact the first inner wall surface 24.

[0065] The support portion 38 is attached to the second body region 20. Specifically, the second lid 2 and the second body region 20 are fastened together by, for example, a screw (not shown) that passes through the second through hole 29 and is screwed into the screw hole 88. By removing the screw, the second lid 2 and the first lid 1 (see FIGS. 8 and 9 ) can be interchanged.

[0066] In the first direction 101, the second terminal 57 may be disposed at a position substantially coincident with the center O of the first recess 81. Similarly, in the first direction 101, the fourth terminal 59 may be disposed at a position substantially coincident with the center O of the first recess 81.

[0067] 13 , when the second lid 2 is attached to the second body region 20, the second terminal 57 is exposed to the outside of the turning tool 100. In the first direction 101, the second terminal 57 is located between the first side surface portion 31 and the second bottom surface 48.

[0068] When the second lid 2 is attached to the second body region 20, the third terminal 58 is disposed between the support portion 38 and the first bottom surface 23. The third terminal 58 is surrounded by the second inner wall surface 25. The third terminal 58 is electrically connected to the first terminal 56. Specifically, the third terminal 58 and the first terminal 56 are electrically connected by, for example, a connection wire 96. The connection wire 96 is detachable from each of the third terminal 58 and the first terminal 56. From another perspective, the third terminal 58 can be electrically disconnected from the first terminal 56. Similarly, the fifth terminal (not shown) is electrically connected to the first terminal 56.

[0069] When the second cover 2 is attached to the second body region 20, the second body region 20 and the second cover 2 form a second internal space 87. A portion of the housing 53 is disposed in the second internal space 87. The third terminal 58 is disposed in the second internal space 87. The second internal space 87 does not necessarily have to accommodate a battery 95 (see FIG. 9 ). The fifth recess 85 is separated from the second internal space 87 by the second cover 2.

[0070] Next, the operation of the turning tool 100 will be described. When turning a workpiece, the turning tool 100 is held by a machine tool. With the main cutting edge of the cutting tip 90 pressed against the rotating workpiece, the turning tool 100 is moved in the feed direction, thereby turning the workpiece.

[0071] 8 and 9 , when the first lid 1 is attached to the second main body region 20, the first terminal 56 is electrically connected to the battery 95. This allows power to be supplied from the battery 95 to each of the first sensor 61, the second sensor 62, the AD converter 66, and the wireless communication unit 67. Therefore, when the workpiece is being turned, each of the first sensor 61 and the second sensor 62 can detect distortion of the main body portion 5.

[0072] Each of the first sensor 61 and the second sensor 62 outputs an analog signal including detected information to the AD converter 66. The AD converter 66 converts the analog signals input from each of the first sensor 61 and the second sensor 62 into digital signals. The AD converter 66 outputs the digital signals to the wireless communication unit 67. The wireless communication unit 67 transmits the digital signals input from the AD converter 66 to the outside. Specifically, the wireless communication unit 67 transmits the signals to a receiving unit (not shown) provided outside the turning tool 100. In this way, the wireless communication unit 67 transmits the signals received from each of the first sensor 61 and the second sensor 62 to the outside.

[0073] 12 and 13 , when the second cover 2 is attached to the second main body region 20, the first terminal 56 is electrically connected to an external power supply (not shown) via the cable 9. This allows power to be supplied from the external power supply to each of the first sensor 61, the second sensor 62, the AD converter 66, and the wireless communication unit 67. This allows each of the first sensor 61 and the second sensor 62 to detect distortion of the main body portion 5.

[0074] Next, the effects of the turning tool 100 according to the first embodiment will be described. When the turning tool 100 has a sensor, a power source is required to supply power to the sensor. When the turning tool 100 has a built-in battery 95 as a power source, contact between the machine tool and the workpiece and the turning tool 100 can be prevented. However, the operating time of the sensor is determined by the discharge capacity of the battery 95. Therefore, when the sensor continuously detects a physical quantity for a relatively long period of time, the discharge capacity of the battery 95 may become insufficient. As a result, the sensor cannot continuously detect the physical quantity for a relatively long period of time.

[0075] On the other hand, when the turning tool 100 is electrically connected to an external power source, power can be supplied from the external power source to the sensor for a longer period of time or semi-permanently than when the battery 95 is built in. Therefore, the sensor can operate continuously for a longer period of time compared to when power is supplied to the sensor from the battery 95. However, a cable 9 is required to electrically connect the turning tool 100 to the external power source. Therefore, the cable 9 may come into contact with the machine tool or the workpiece. For these reasons, the turning tool 100 is required to be able to switch between supplying power to the sensor from the external power source and supplying power to the sensor from the battery 95 depending on the period during which the sensor operates, the structure of the machine tool, the shape of the workpiece, and the like.

[0076] The turning tool 100 according to the first embodiment includes a second body region 20, a first sensor 61, a first terminal 56, a first lid 1, and a second lid 2. A first recess 81 is provided in the second body region 20. The first terminal 56 is electrically connected to the first sensor 61. The first terminal 56 is disposed within the first recess 81. The first lid 1 and the second lid 2 can each be attached to the second body region 20 so as to cover the first recess 81. When the first lid 1 is attached to the second body region 20, the second body region 20 and the first lid form a first internal space 86. The first internal space 86 houses a battery 95. The second lid 2 has a connector 39 electrically connectable to the first terminal 56. The first lid 1 and the second lid 2 are interchangeable.

[0077] Therefore, when the first cover 1 is attached to the second body region 20, power can be supplied from the battery 95 housed in the first internal space 86 to the first sensor 61. When the second cover 2 is attached to the second body region 20, power can be supplied from an external power source to the first sensor 61 via the connector 39. Therefore, by exchanging the first cover 1 and the second cover 2 with each other, it is possible to switch between supplying power from the battery 95 to the first sensor 61 and supplying power from the external power source to the first sensor 61.

[0078] When turning tool 100 is attached to a machine tool, cutting tip 90 and a portion of turning tool 100 protrude from the machine tool. As the length of the portion of turning tool 100 protruding from the machine tool increases, vibrations of cutting tip 90 and turning tool 100 increase when turning a workpiece. Therefore, it is desirable to keep the length of the portion of turning tool 100 protruding from the machine tool short.

[0079] According to the turning tool 100 of the first embodiment, the second body region 20 has a rear end surface 21 and an outer surface 22. A first recess 81 is provided in the outer surface 22. Therefore, when the second cover 2 is attached to the second body region 20, the cable 9 can be prevented from protruding from the rear end surface 21. This reduces the distance between the rear end surface 21 and the machine tool. This reduces the length of the portion of the turning tool 100 that protrudes from the machine tool in the longitudinal direction 110 when the turning tool 100 is attached to the machine tool. As a result, vibrations of the cutting tip 90 and the turning tool 100 can be reduced when turning a workpiece.

[0080] According to the turning tool 100 according to the first embodiment, the first body region 10 has a seating surface 15. The seating surface 15 supports the cutting tip 90. The first sensor 61 is provided between the seating surface 15 and the first recess 81 in the longitudinal direction 110. Therefore, when turning a workpiece, the distance between the first sensor 61 and the cutting tip 90 in the longitudinal direction 110 can be shortened. This improves the sensitivity of the first sensor 61 to changes in physical quantities caused by contact between the cutting tip 90 and the workpiece.

[0081] For example, in a typical contour turning operation in which the tool is fed from the end face of the workpiece, the workpiece is positioned in the feed direction relative to the turning tool 100. In this case, the portion of the machine tool that holds the turning tool 100 is typically not positioned in a space positioned in the feed direction relative to the turning tool 100. This prevents contact between the machine tool and the workpiece. According to the turning tool 100 of the first embodiment, the first recess 81 is provided on the surface (first side surface portion 31) of the outer surface 22 that corresponds to the main flank surface 91 of the cutting tip 90. Therefore, when the second cover 2 is attached to the second main body region 20, the cable 9 connected to the connector 39 of the second cover 2 is positioned in the feed direction relative to the turning tool 100. This prevents contact between the cable 9 and the machine tool.

[0082] The turning tool 100 according to the first embodiment has a wireless communication unit 67. The wireless communication unit 67 transmits a signal received from the first sensor 61 to the outside. This makes it possible to grasp information detected by the first sensor 61 even while turning the workpiece.

[0083] Second Embodiment Next, the configuration of a turning tool 100 according to a second embodiment will be described. The turning tool 100 according to the second embodiment differs from the turning tool 100 according to the first embodiment mainly in that the connector 39 of the second lid 2 is located relatively close to the rear end surface 21 of the main body 5, but is otherwise substantially identical to the turning tool 100 according to the first embodiment. The following description will focus on the differences from the turning tool 100 according to the first embodiment.

[0084] Fig. 14 is an enlarged schematic cross-sectional view showing the configuration of a turning tool 100 according to the second embodiment. The cross-section shown in Fig. 14 corresponds to the cross-section shown in Fig. 13. As shown in Fig. 14, when the second lid 2 is attached to the second body region 20, the connector 39 may be disposed between the rear end face 21 and the center O in the longitudinal direction 110. From another perspective, the second terminal 57 may be disposed between the rear end face 21 and the center O in the longitudinal direction 110.

[0085] This makes it possible to increase the distance between the cable 9 and the cutting tip 90 (see FIG. 12 ) in the first direction 101. This makes it possible to prevent the cable 9 from coming into contact with the workpiece, the chuck of the machine tool spindle that holds the workpiece, chips, and cutting oil when turning the workpiece.

[0086] Although the above description has been given of a configuration in which each of the first sensor 61 and the second sensor 62 (hereinafter also referred to as the sensor) is a strain sensor, the configuration of the turning tool 100 according to the present disclosure is not limited to the above configuration. Specifically, the sensor may be, for example, a temperature sensor or an acceleration sensor. If the sensor is a temperature sensor, it can measure the temperature of the main body 5 when turning a workpiece. If the sensor is an acceleration sensor, it can measure the vibration of the main body 5 when turning a workpiece.

[0087] The number of sensors included in the turning tool 100 is not limited to two. Specifically, the turning tool 100 may include only one sensor, or three or more sensors. The sensors may be attached to the first body region 10.

[0088] The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include meanings equivalent to the claims and all modifications within the scope thereof.

[0089] 1 First lid, 2 Second lid, 3 Third lid, 4 Fourth lid, 5 Main body, 6 Fixing part, 7 Fastening screw, 9 Cable, 10 First main body region, 11 First surface, 12 Second surface, 13 Third surface, 14 Fourth surface, 15 Seat surface, 16 First seat surface section, 17 Second seat surface section, 18 Corner, 19 First through hole, 20 Second main body region, 21 Rear end surface, 22 outer surface, 23 first bottom surface, 24 first inner wall surface, 25 second inner wall surface, 26 support surface, 27 boundary surface, 29 second through hole, 31 first side surface, 32 second side surface, 33 third side surface, 34 fourth side surface, 38 support section, 39 connector, 41 first plane, 42 second plane, 43 third plane, 44 fourth plane, 45 First outer peripheral surface, 46 Second outer peripheral surface, 47 Third inner wall surface, 48 Second bottom surface, 50 Inner peripheral surface, 51 Plate portion, 52 Convex portion, 53 Housing, 56 First terminal, 57 Second terminal, 58 Third terminal, 59 Fourth terminal, 61 First sensor, 62 Second sensor, 66 AD converter, 67 Wireless communication unit, 68 First connecting passage, 69 Second connecting passage, 70 Third connecting passage, 71 First board, 72 Second board, 73 Third board, 76 First wiring, 77 Second wiring, 78 Third wiring, 79 Fourth wiring, 80 Fifth wiring, 81 First recess, 82 Second recess, 83 Third recess, 84 Fourth recess, 85 Fifth recess, 86 First internal space, 87 Second internal space, 88 Screw hole, 90 Cutting tip, 91 Main relief surface, 94 Bottom plate, 95 Battery, 96 Connecting wiring, 100 Turning tool, 101 First direction, 102 Second direction, 103 Third direction, 110 Longitudinal direction, O Center.

Claims

1. A turning tool for holding cutting tips, comprising: a body portion including a first body region to which the cutting tips are attached, and a second body region connected to the first body region and having a recess; a sensor attached to the body portion; a first terminal electrically connected to the sensor and disposed in the recess; a first lid attachable to the second body region so as to cover the recess; and a second lid including a connector electrically connectable with the first terminal and attachable to the second body region so as to cover the recess; when the first lid is attached to the second body region, the second body region and the first lid form an internal space that houses a battery electrically connectable to the first terminal, and the first lid and the second lid are interchangeable.

2. The turning tool according to claim 1, wherein the second body region has a rear end surface opposite the first body region and an outer side surface connected to the rear end surface, and the recess is provided on the outer side surface.

3. A turning tool as described in claim 2, wherein the first body region has a seat surface that supports the cutting tip, and the sensor is provided between the seat surface and the recess in a direction from the first body region toward the rear end surface.

4. A turning tool as described in claim 2 or claim 3, wherein the second lid includes a support portion that supports the connector and is attached to the second body region, the connector has a second terminal and a third terminal electrically connected to the second terminal, when the second lid is attached to the second body region, the second terminal is exposed to the outside of the turning tool, the third terminal is arranged between the support portion and the bottom surface of the recess, and in a direction from the first body region toward the rear end surface, the second terminal is arranged between the rear end surface and the center of the recess.

5. A turning tool according to any one of claims 2 to 4, wherein the recess is provided on the outer surface corresponding to the main flank surface of the cutting tip.

6. A turning tool according to any one of claims 1 to 5, further comprising a wireless communication unit electrically connected to the sensor and transmitting a signal received from the sensor to the outside of the turning tool.

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