Cutting tool and method for manufacturing cut product

Abstract

Even if the cutting tool is provided with a sensor, the possibility that the manufacturing cost of the cutting tool is increased is reduced. The sensor is located on the outer surface on the tip side of the shank. The wiring member is electrically connected to the sensor and extends from the sensor side toward the rear end of the shank. The shank has a groove that opens in both the lower surface and the second side surface and extends from the front end toward the rear end. The wiring member is located in the groove.

Description

Technical Field

[0001] The present disclosure relates to a cutting tool used for cutting a workpiece and a method for manufacturing a cut product. Background Art

[0002] As a cutting tool used in cutting a workpiece for manufacturing a cutting object, for example, there is known a cutting tool described in Patent Document 1. The cutting tool described in Patent Document 1 includes: a rod-shaped tool holder (referred to as a main body in Patent Document 1); a sensor portion for detecting a physical quantity (referred to as physical information in Patent Document 1) of a cutting blade (referred to as a cutting edge in Patent Document 1); and a wiring member (referred to as a cable member in Patent Document 1) electrically connected to the sensor portion. In the cutting tool described in Patent Document 1, the wiring member is built into the tool holder.

[0003] Prior Art Literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Publication No. 2012-020359 Summary of the invention

[0006] The cutting tool disclosed in the present invention comprises a shank, a cutting blade, a sensor and a wiring member. The shank is in the shape of a rod extending from the front end toward the rear end, and has: a front end face located on the front end side, an upper surface extending from the front end face toward the rear end, a lower surface located on the opposite side of the upper surface, a first side surface located between the upper surface and the lower surface and extending from the front end face toward the rear end, a second side surface located on the opposite side of the first side surface, and a knife groove opening on the front end face, the upper surface and the first side surface. The cutting blade is located in the knife groove and has a cutting edge. The sensor is located on the outer surface of the shank on the front end side and detects the physical quantity of the shank. The wiring member is electrically connected to the sensor and extends from the sensor side toward the rear end. The shank also has a groove opening on both the lower surface and the second side surface and extending from the front end side toward the rear end. The wiring member is located in the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic perspective view of a cutting tool according to an embodiment of the present disclosure.

[0008] Figure 2 From another perspective Figure 1 A schematic perspective view of a cutting tool is shown.

[0009] Figure 3 yes Figure 1 A schematic top view of a cutting tool is shown.

[0010] Figure 4 Viewed from the front side Figure 1 Schematic diagram of the cutting tool shown.

[0011] Figure 5 yes Figure 1 A schematic side view of a cutting tool is shown.

[0012] Figure 6 Yes Figure 5 An enlarged schematic diagram of the other side of the cutting tool is shown.

[0013] Figure 7 It is along Figure 5 Cross-sectional view along line VII-VII.

[0014] Figure 8 It is along Figure 5 Cross-sectional view along line VIII-VIII in FIG.

[0015] Fig. 9 It is along Figure 5 Cross-sectional view of line IX-IX in the figure.

[0016] Fig.10 yes Figure 8 0 is an enlarged view of the X portion in FIG. 1 and is an enlarged cross-sectional view showing the groove and wiring member of the shank.

[0017] Fig.11 This is an enlarged cross-sectional view showing a groove and a wiring member of a shank in a cutting tool according to another mode of an embodiment of the present disclosure.

[0018] Fig.12 This is an enlarged cross-sectional view showing a groove and a wiring member of a shank in a cutting tool according to another mode of an embodiment of the present disclosure.

[0019] Fig.13 This is an enlarged cross-sectional view showing a groove and a wiring member of a shank in a cutting tool according to another mode of an embodiment of the present disclosure.

[0020] Fig.14 This is a schematic diagram for explaining a method for producing a machined product according to an embodiment of the present disclosure.

[0021] Fig.15 This is a schematic diagram for explaining a method for producing a machined product according to an embodiment of the present disclosure.

[0022] Fig.16 This is a schematic diagram for explaining a method for producing a machined product according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] In the cutting tool described in Patent Document 1, in order to embed the wiring member in the tool holder, a through hole for accommodating the wiring member needs to be formed in the tool holder. However, it is not easy to form an elongated through hole along the central axis of the rod-shaped tool holder, which may increase the manufacturing cost of the cutting tool. In other words, if the cutting tool described in Patent Document 1 is provided with a sensor part, it may increase the manufacturing cost of the cutting tool.

[0024] According to the present disclosure, even when a cutting tool is provided with a sensor, the possibility of an increase in the manufacturing cost of the cutting tool can be reduced.

[0025] Hereinafter, the cutting tool and the method for manufacturing a cut product according to the embodiment of the present disclosure will be described in detail using the accompanying drawings. However, for the sake of convenience, the following referenced figures only simplify the components required for describing the embodiment. Therefore, the cutting blade according to the embodiment of the present disclosure may have any components not shown in the referenced figures. The dimensions of the components in the figures do not faithfully represent the dimensions of the actual components and the dimensional ratios of the components.

[0026] In addition, in the present disclosure, the description is based on the orthogonal coordinate system XYZ defined by three mutually orthogonal directions. The X direction refers to the front-to-back direction, one side of the X direction is the front side or the front direction, and the other side of the X direction is the rear side or the rear direction. The Y direction refers to the left-to-right direction, one side of the Y direction is the left side or the left direction, and the other side of the Y direction is the right side or the right direction. The Z direction refers to the up-down direction, one side of the Z direction is the upper side or the upper direction, and the other side of the Z direction is the lower side or the lower direction. The XY direction refers to the two directions of the X direction and the Y direction, the XZ direction refers to the two directions of the X direction and the Z direction, and the YZ direction refers to the two directions of the Y direction and the Z direction. The XYZ direction refers to the three directions of the X direction, the Y direction, and the Z direction.

[0027] In the drawings, “FF” means a front direction, “FR” means a rear direction, “L” means a left direction, “R” means a right direction, “U” means an upper direction, and “D” means a lower direction.

[0028] <Cutting tools>

[0029] Reference Figures 1 to 13 A cutting tool 10 according to an embodiment of the present disclosure will be described. Figure 1 It is a schematic perspective view of the cutting tool 10 according to the embodiment of the present disclosure. Figure 2 From another perspective Figure 1 A schematic perspective view of a cutting tool is shown. Figure 3 yes Figure 1 A schematic top view of a cutting tool 10 is shown. Figure 4 Viewed from the front side Figure 1A schematic diagram of a cutting tool 10 is shown. Figure 5 yes Figure 1 A schematic side view of a cutting tool 10 is shown. Figure 6 It will be from Figure 5 An enlarged side view of the vicinity of the sensor unit when viewed from the opposite side. Figure 7 It is along Figure 5 Cross-sectional view along line VII-VII. Figure 8 It is along Figure 5 Cross-sectional view along line VIII-VIII in FIG. Fig. 9 It is along Figure 5 Cross-sectional view of line IX-IX in the figure. Fig.10 yes Figure 8 0 is an enlarged view of the X portion in FIG. 1 and is an enlarged cross-sectional view showing the groove and wiring member of the shank. Figures 11 to 13 This is an enlarged cross-sectional view showing a groove and a wiring member of a shank in a cutting tool according to another mode of an embodiment of the present disclosure.

[0030] like Figures 1 to 3 As shown in the example, the cutting tool 10 according to the embodiment of the present disclosure is used for a workpiece W (see Fig.14 ). The cutting process of the workpiece W includes outer diameter processing, inner diameter processing, grooving processing, and cutting processing. In addition, the cutting tool 10 can include a tool holder 14 mounted on a tool holder 12 of a lathe, a cutting blade 16 held in the tool holder 14, a fixture 18 for fixing the cutting blade 16 to the tool holder 14, and a clamping screw 20 for mounting the fixture 18 on the tool holder 14.

[0031] like Figures 1 to 3 As shown in the example, the handle 14 may be a rod extending from the front end 14a toward the rear end 14b along the X direction. The length direction of the handle 14 may be the X direction. The handle 14 may have a quadrangular columnar body 14m located on the rear end 14b side of the clamp 18.

[0032] like Figures 1 to 5 As shown in the example, the handle 14 may have a front end face 22 located on the side of the front end 14a and a rear end face 24 located on the opposite side of the front end face 22. The handle 14 may have an upper surface 26 extending from the front end face 22 toward the rear end 14b along the X direction to the rear end face 24. The handle 14 may have a lower surface 28 located on the opposite side of the upper surface 26, and the lower surface 28 may extend from the front end face 22 toward the rear end 14b along the X direction to the rear end face 24.

[0033] The handle 14 may have a first side surface 30 between the upper surface 26 and the lower surface 28, and the first side surface 30 may extend from the front end surface 22 toward the rear end 14b along the X direction to the rear end surface 24. The first side surface 30 of the handle 14 may be connected to the upper surface 26 and the lower surface 28. In the main body 14m of the handle 14, the first side surface 30 may be orthogonal to the lower surface 28 and the upper surface 26.

[0034] The handle 14 may have a second side surface 32 located on the opposite side of the first side surface 30, and the second side surface 32 may extend from the front end surface 22 toward the rear end 14b along the X direction to the rear end surface 24. The second side surface 32 may be connected to the upper surface 26 and the lower surface 28. In the main body 14m, the second side surface 32 may be orthogonal to the lower surface 28 and the upper surface 26.

[0035] The front end face 22, the rear end face 24, the upper surface 26, the lower surface 28, the first side surface 30 and the second side surface 32 of the tool holder 14 may constitute the outer surface of the tool holder 14. In addition, the tool holder 14 may have a tool groove 34 on the front end 14a side for holding the cutting blade 16. The tool groove 34 may be open on the front end face 22, the upper surface 26 and the first side surface 30.

[0036] When the cutting tool 10 is mounted on the tool holder 12, the lower surface 28 of the main body portion 14m of the shank 14 is supported on the mounting surface 12a of the tool holder 12 (see Figure 8 The second side surface 32 of the main body portion 14m of the shank 14 is supported by the inner wall surface 12b of the tool holder 12 (see Figure 8 The upper surface 26 of the main body 14m of the shank 14 is fixed by the fixing screw 12c of the tool holder 12 (see Figure 8 ) Press.

[0037] Examples of the material of the handle 14 include metals such as stainless steel, carbon steel, cast iron, and aluminum alloy. The length of the handle 14 can be set to, for example, 100 mm to 400 mm.

[0038] like Figures 1 to 5 As shown in the example, the cutting blade 16 can be located at the knife groove 34 of the handle 14. The cutting blade 16 can be a replaceable blade that is called a non-regrinding blade. The cutting blade 16 can be in a square plate shape, a triangular plate shape or a pentagonal plate shape other than the square plate shape, etc. The cutting blade 16 can have a first blade face 36, a second blade face 38 located on the opposite side of the first blade face 36, and a plurality of blade side faces 40 located between the first blade face 36 and the second blade face 38.

[0039] The cutting insert 16 may have a cutting edge 42 at the intersection of the first insert face 36 and the insert side face 40. The first insert face 36 may function as a rake face for flowing the chips. The insert side face 40 may function as a relief face.

[0040] The cutting insert 16 may include through holes 44 that open in the first blade face 36 and the second blade face 38. The cutting insert 16 is attached to the slit 34 by tightening the clamp screw 20 with the tip of the jig 18 locked in the through hole 44.

[0041] As the material of the cutting blade 16, for example, cemented carbide or cermet can be cited. As the composition of cemented carbide, for example, WC-Co, WC-TiC-Co and WC-TiC-TaC-Co can be cited. WC-Co is produced by adding cobalt (Co) powder to tungsten carbide (WC) and sintering. WC-TiC-Co is formed by adding titanium carbide (TiC) to WC-Co. WC-TiC-TaC-Co is formed by adding tantalum carbide (TaC) to WC-TiC-Co. In addition, cermet is a sintered composite material formed by compounding metal and ceramic components. Specifically, as cermet, cermet with titanium compounds such as titanium carbide (TiC) and titanium nitride (TiN) as the main component can be cited.

[0042] The surface of the cutting insert 16 can be coated with a coating using a chemical vapor deposition (CVD) method or a physical vapor deposition (PVD) method. Examples of the coating material include titanium carbide (TiC), titanium nitride (TiN), titanium carbonitride (TiCN), or aluminum oxide (Al 2 O 3 )wait.

[0043] like Figures 2 to 7 As shown in the example, the cutting tool 10 may include a sensor unit 46 for detecting physical quantities such as acceleration, vibration, strain or internal stress of the shank 14 (cutting tool 10). The sensor unit 46 may be located at a position from the lower surface 28 of the main body 14m to the second side surface 32 on the side of the front end 14a of the shank 14. The unit base 48 may be mounted on the main body 14m of the shank 14 by an adhesive. The unit base 48 may be mounted on the main body 14m of the shank 14 by the magnetic force of a built-in magnet. In addition, the unit base 48 may be mounted on the main body 14m of the shank 14 by a fixing member such as a screw. As the material of the unit base 48, for example, synthetic resin and metal may be cited.

[0044] like Figure 4 and Figure 7As shown in the example, the unit base 48 may be L-shaped in a cross section perpendicular to the longitudinal direction of the handle 14, that is, the X direction. The unit base 48 may have a first portion 48a located on the lower surface 28 of the handle 14 and a second portion 48b located on the second side surface 32 of the handle 14.

[0045] like Figure 6 and Figure 7 As shown in the example, the first portion 48a of the unit base 48 may have a first recess 50 that opens toward the lower surface 28 of the handle 14. The first recess 50 of the unit base 48 may be either a bottomed hole (depression) or a through hole. The second portion 48b of the unit base 48 may have a second recess 52 that opens toward the second side surface 32 of the handle 14. The second recess 52 of the unit base 48 may be either a bottomed hole or a through hole. The second portion 48b of the unit base 48 may have a third recess 54 that opens toward the second side surface 32 of the handle 14. The third recess 54 of the unit base 48 may be either a bottomed hole or a through hole. The third recess 54 of the unit base 48 may be continuous with the second recess 52.

[0046] The sensor unit 46 may include a first sensor 56 located in a first recess 50 of the unit base 48. The first sensor 56 may be fixed in the first recess 50 of the unit base 48 by an adhesive or the like. The first sensor 56 may abut against the lower surface 28 of the tool holder 14. The first sensor 56 may be located on the lower surface 28 as an outer surface on the side of the front end 14a of the tool holder 14. The first sensor 56 may detect any one or more of the physical quantities such as acceleration, vibration, strain or internal stress of the tool holder 14. The detection direction of the first sensor 56 may also be the Y direction. In other words, the first sensor 56 may detect physical quantities such as acceleration, vibration, strain or internal stress of the tool holder 14 in the Y direction. The first sensor 56 may detect the acceleration of the tool holder 14 corresponding to the feed component force as one of the cutting loads, etc.

[0047] The sensor unit 46 may include a second sensor 58 located in the second recess 52 of the unit base 48. The second sensor 58 may be fixed in the second recess 52 of the unit base 48 by an adhesive or the like. The second sensor 58 may abut against the second side surface 32 of the tool holder 14. The second sensor 58 may be located on the second side surface 32 as the outer surface on the side of the front end 14a of the tool holder 14. The second sensor 58 may detect any one or more of the physical quantities such as acceleration, vibration, strain or internal stress of the tool holder 14. The second sensor 58 may detect the same physical quantity as the first sensor 56. The detection direction of the second sensor 58 may be the X direction orthogonal to the detection direction of the first sensor 56. In other words, the second sensor 58 may detect the physical quantity such as acceleration, vibration, strain or internal stress of the tool holder 14 in the X direction. The second sensor 58 may detect the acceleration of the tool holder 14 corresponding to the back force as the cutting load.

[0048] The sensor unit 46 may include a third sensor 60 located in the third recess 54 of the unit base 48. The third sensor 60 may be fixed in the third recess 54 of the unit base 48 by an adhesive or the like. The third sensor 60 may abut against the second side surface 32 of the tool holder 14. The third sensor 60 may be located on the second side surface 32 on the side of the front end 14a of the tool holder 14. The third sensor 60 may detect any one or more of the physical quantities such as acceleration, vibration, strain, or internal stress of the tool holder 14. The third sensor 60 may detect the same physical quantity as the first sensor 56 and the second sensor 58. The detection direction of the third sensor 60 may be the Z direction orthogonal to the detection direction of the first sensor 56 and the second sensor 58. In other words, the third sensor 60 may detect the physical quantity such as acceleration, vibration, strain, or internal stress of the tool holder 14 in the Z direction. The third sensor 60 may detect the acceleration of the tool holder 14 corresponding to the main component force as one of the cutting loads.

[0049] The first sensor 56, the second sensor 58, and the third sensor 60 can detect physical quantities such as acceleration, vibration, strain, or internal stress of the tool holder 14 in the XYZ direction. The first sensor 56, the second sensor 58, and the third sensor 60 can detect acceleration of the tool holder 14 corresponding to the cutting load (main force component, back force component, feed force component) in three directions.

[0050] The first sensor 56, the second sensor 58, and the third sensor 60 may have the same position in the X direction. The first sensor 56, the second sensor 58, and the third sensor 60 may be a sensor of an electrostatic capacitance detection method or a sensor of a piezoresistance method. When the first sensor 56, the second sensor 58, and the third sensor 60 are sensors of an electrostatic capacitance detection method, the sensor may be a MEMS (Micro Electro Mechanical Systems).

[0051] The detection direction of the first sensor 56 can be changed from the Y direction to the XY direction. The first sensor 56 can detect physical quantities such as acceleration, vibration, strain, or internal stress of the tool holder 14 in the XY direction. The first sensor 56 can detect the acceleration of the tool holder 14 corresponding to the feed force component and the main force component. In these cases, any one of the second sensor 58 or the third sensor 60 can be omitted from the constituent elements of the sensor unit 46. The first sensor 56 and the second sensor 58, or the first sensor 56 and the third sensor 60 can detect physical quantities such as acceleration, vibration, strain, or internal stress of the tool holder 14 in the XYZ direction. The first sensor 56 and the second sensor 58, or the first sensor 56 and the third sensor 60 can detect the acceleration of the tool holder 14 corresponding to the cutting load in three directions.

[0052] The detection direction of the second sensor 58 can be changed from the X direction to the XZ direction. The second sensor 58 can detect physical quantities such as acceleration, vibration, strain, or internal stress of the tool holder 14 in the XZ direction. The second sensor 58 can detect the acceleration of the tool holder 14 corresponding to the back force and the main force. In this case, the third sensor 60 can be omitted from the components of the sensor unit 46. The first sensor 56 and the second sensor 58 can detect physical quantities such as acceleration, vibration, strain, or internal stress of the tool holder 14 in the XYZ direction. The first sensor 56 and the second sensor 58 can detect the acceleration of the tool holder 14 corresponding to the cutting load in three directions.

[0053] The detection direction of the third sensor 60 can be changed from the Z direction to the XZ direction. The third sensor 60 can detect physical quantities such as acceleration, vibration, strain, or internal stress of the tool holder 14 in the XZ direction. The third sensor 60 can detect the acceleration of the tool holder 14 corresponding to the main force component and the back force component. In this case, the second sensor 58 can be omitted from the components of the sensor unit 46. The first sensor 56 and the third sensor 60 can detect physical quantities such as acceleration, vibration, strain, or internal stress of the tool holder 14 in the XYZ direction. The first sensor 56 and the third sensor 60 can detect the acceleration of the tool holder 14 corresponding to the cutting load in three directions.

[0054] like Figure 2 , Figure 5 , Figure 6 , Figure 8 as well as Fig. 9 As shown in the example, the cutting tool 10 may include a wiring member 62 electrically connected to the first sensor 56, the second sensor 58, and the third sensor 60. The wiring member 62 may extend from the first sensor 56 side toward the rear end 14b of the shank 14 in the X direction.

[0055] like Figure 2 , Figure 5 , Figure 6 , Figures 9 to 13 As shown in the example, the handle 14 may have a groove 64 that is open on both the lower surface 28 and the second side 32. When the groove 64 is open on both the lower surface 28 and the second side 32, it is easier to form the groove 64 than when it is open only on one of the lower surface 28 and the second side 32. In addition, when the wiring member 62 is located in the groove 64 as described later, the wiring member 62 is easy to install. The groove 64 of the handle 14 may be open relative to the rear end surface 24. The groove 64 of the handle 14 may extend from the front end 14a side toward the rear end 14b along the X direction. The groove 64 of the handle 14 may have a first support surface 66 connected to the second side 32, and a second support surface 68 connected to the lower surface 28.

[0056] like Fig.10 As shown in the example, in the cross section of the handle 14 perpendicular to the longitudinal direction, that is, the X direction, the width J of the groove 64 in the direction parallel to the second side surface 32 can be greater than the width K of the groove in the direction parallel to the lower surface 28. Figure 2 and Figure 3 As shown in the example, the groove 64 of the handle 14 can be located closer to the rear end 14b of the handle 14 than the groove 34. The groove 64 of the handle 14 can be located closer to the second side 32 than the groove 34.

[0057] like Figure 2 , Figure 6 , Figures 9 to 13 As shown in the example, the wiring member 62 can be located in the groove 64 of the handle 14. In other words, the groove 64 of the handle 14 can accommodate the wiring member 62. The wiring member 62 can be electrically connected to the first sensor 56, the second sensor 58, and the third sensor 60. The wiring member 62 can extend from the first sensor 56 side toward the rear end 14b of the handle 14 along the X direction.

[0058] like Figures 9 to 13As shown in the example, the wiring member 62 may include a wiring conductor 70 electrically connected to the first sensor 56, the second sensor 58, and the third sensor 60. The wiring conductor 70 may extend from the first sensor 56 side toward the rear end 14b of the shank 14 in the X direction.

[0059] The wiring member 62 may include a cylindrical retaining member 72 for retaining the wiring conductor 70. The retaining member 72 may be located in the groove 64 of the shank 14. In other words, the groove 64 of the shank 14 may accommodate the retaining member 72. The retaining member 72 may extend from the front end 14a of the shank 14 toward the rear end 14b along the X direction. The retaining member 72 may be made of the same material as the shank 14. When the retaining member 72 is made of metal, the retaining member 72 may be divided along the X direction. The retaining member 72 may be made of a synthetic resin, and the retaining member 72 may be an extruded product.

[0060] like Figures 10 to 13 As shown in the example, the holding member 72 may have a first end face 74 located on the lower surface 28 side of the handle 14 and a second end face 76 located on the second side 32 side of the handle 14. The distance in the Z direction from the upper surface 26 of the handle 14 to the first end face 74 of the holding member 72 may be less than the distance in the Z direction from the upper surface 26 to the lower surface 28 of the handle 14. The distance in the Y direction from the first side 30 of the handle 14 to the second end face 76 of the holding member 72 may be less than the distance in the Y direction from the first side 30 to the second side 32 of the handle 14.

[0061] The holding member 72 may have a first abutting surface 78 located on the opposite side of the first end surface 74, and the first abutting surface 78 may abut against the first supporting surface 66 of the groove 64 of the handle 14. The holding member 72 may have a second abutting surface 80 located on the opposite side of the second end surface 76, and the second abutting surface 80 may abut against the second supporting surface 68 of the groove 64 of the handle 14.

[0062] like Fig.11 As shown in the example, the first abutment surface 78 of the holding member 72 and the first support surface 66 of the groove 64 of the handle 14 are inclined relative to the imaginary plane VF parallel to the lower surface 28 in a manner away from the lower surface 28 as they move away from the second side surface 32 of the handle 14. Fig.12 As shown in the example, the second abutment surface 80 of the retaining member 72 and the second support surface 68 of the groove 64 of the handle 14 can be inclined relative to the virtual plane VP orthogonal to the lower surface 28 so as to move away from the second side surface 32 as they move away from the lower surface 28 of the handle 14.

[0063] like Fig.13In the example shown, the first support surface 66 and the second support surface 68 of the groove 64 of the handle 14 may also be planes. The groove 64 of the handle 14 may also have a connecting surface 82 in a concave curved shape between the first support surface 66 and the second support surface 68. The wiring member 62 may be separated from the connecting surface 82 of the groove 64 of the handle 14.

[0064] The wiring member 62 can be electrically connected to an information processing device provided outside the machine tool, etc. The information processing device can be constituted by a computer, and can include a memory storing various control programs and a CPU (Central Processing Unit) that interprets and executes the control programs.

[0065] The information processing device performs various functions by executing the control program by the CPU. In one embodiment, the information processing device can adjust the moving speed of the cutting tool 10 based on the physical quantity of the tool holder 14 detected by the first sensor 56, the second sensor 58, and the third sensor 60. In one embodiment, the information processing device can adjust the rotation speed of the workpiece W based on the physical quantity of the tool holder 14 detected by the first sensor 56, the second sensor 58, and the third sensor 60.

[0066] According to the example of the embodiment of the present disclosure, the groove 64 of the shank 14 is open on both the lower surface 28 and the second side surface 32, and extends from the first sensor 56 side toward the rear end 14b of the shank 14 in the X direction. Therefore, the groove 64 can be easily processed on the shank 14 using a milling tool such as an end mill having a width larger than the groove width of the groove 64. Therefore, according to the example of the embodiment of the present disclosure, even when the cutting tool 10 is provided with the sensor unit 46, the possibility of an increase in the manufacturing cost of the cutting tool 10 can be reduced. In the case where the groove 64 of the shank 14 is open only on one of the lower surface 28 and the second side surface 32, it is necessary to use a small-diameter milling tool having a shape corresponding to the groove width of the groove 64 to process the groove 64 on the shank 14.

[0067] In addition, when the wiring member 62 has the cylindrical holding member 72, the play of the wiring member 62 can be reduced in the groove 64 of the shank 14. Therefore, according to the example of the embodiment of the present disclosure, damage to the wiring member 62 can be avoided.

[0068] According to the example of the embodiment of the present disclosure, as described above, the distance in the Z direction from the upper surface 26 of the shank 14 to the first end surface 74 of the holding member 72 is less than the distance in the Z direction from the upper surface 26 to the lower surface 28 of the shank 14. In addition, the distance in the Y direction from the first side surface 30 of the shank 14 to the second end surface 76 of the holding member 72 is less than the distance in the Y direction from the first side surface 30 to the second side surface 32 of the shank 14. In such a case, the wiring member 62 is less likely to protrude from the outer surface of the shank 14. Thus, according to the example of the embodiment of the present disclosure, the cutting tool 10 is easily and stably fixed to the tool holder 12.

[0069] like Fig.11 As shown in the example, when the first abutment surface 78 of the holding member 72 and the first support surface 66 of the groove 64 of the shank 14 are inclined relative to the imaginary plane VF, the wiring member 62 is difficult to protrude from the outer surface of the shank 14. Therefore, according to the example of the embodiment of the present disclosure, the cutting tool 10 is easily and stably fixed to the tool holder 12.

[0070] like Fig.12 As shown in the example, when the second abutment surface 80 of the holding member 72 and the second support surface 68 of the groove 64 of the shank 14 are inclined relative to the virtual plane VP, it is difficult for the wiring member 62 to protrude from the outer surface of the shank 14. Therefore, according to the example of the embodiment of the present disclosure, the cutting tool 10 is easily and stably fixed to the tool holder 12.

[0071] like Figures 10 to 13 As shown in the example shown, when the first abutment surface 78 and the second abutment surface 80 of the retaining member 72 abut against the first support surface 66 and the second support surface 68 of the groove 64 of the shank 14, respectively, the positioning of the wiring member 62 relative to the shank 14 becomes easy. Therefore, according to the example of the embodiment of the present disclosure, the installation of the cutting tool 10 to the tool holder 12 becomes simple.

[0072] exist Fig.10 As in the example shown, in the cross section perpendicular to the X direction, when the width K of the groove 64 in the direction parallel to the second side surface 32 is larger than the width J of the groove in the direction parallel to the lower surface 28, it is easy to ensure the rigidity of the tool holder 14 even if the groove 64 is processed in the tool holder 14. Therefore, according to the example of the embodiment of the present disclosure, even when the cutting tool 10 is provided with the sensor unit 46, the aging resistance of the cutting tool 10 can be improved.

[0073] like Figure 2 and Figure 3As shown in the example shown in the figure, when the groove 64 of the shank 14 is located closer to the rear end 14b of the shank 14 than the groove 34, the main component force is difficult to be transmitted to the groove 64 of the shank 14. Therefore, it is possible to avoid stress concentration on the boundary between the first support surface 66 and the second support surface 68 in the groove 64 of the shank 14, and the deformation of the boundary can be reduced. In addition, cracks are difficult to be generated at the above-mentioned boundary. Therefore, according to the example of the embodiment of the present disclosure, even when the cutting tool 10 is provided with the sensor unit 46, the aging resistance of the cutting tool 10 can be improved.

[0074] like Figure 2 and Figure 3 As shown in the example, when the groove 64 of the shank 14 is located closer to the second side surface 32 than the groove 34, the main component force is difficult to be transmitted to the groove 64 of the shank 14. Therefore, it is possible to avoid stress concentration on the boundary between the first support surface 66 and the second support surface 68 in the groove 64 of the shank 14, and the deformation of the boundary can be reduced. In addition, cracks are difficult to be generated at the above-mentioned boundary. Therefore, according to the example of the embodiment of the present disclosure, even when the cutting tool 10 is provided with the sensor unit 46, the aging resistance of the cutting tool 10 can be improved.

[0075] like Fig.13 As shown in the example, when the concave curved connection surface 82 is located between the first support surface 66 and the second support surface 68 in the groove 64 of the shank 14, it is possible to avoid stress concentration on the boundary between the first support surface 66 and the second support surface 68 in the groove 64 of the shank 14, that is, the connection surface 82, and reduce the deformation of the boundary. In addition, cracks are less likely to occur at the above-mentioned boundary. Therefore, according to the example of the embodiment of the present disclosure, even when the cutting tool 10 is provided with the sensor unit 46, the aging resistance of the cutting tool 10 can be improved.

[0076] In particular, when the wiring member 62 is separated from the connection surface 82 of the groove 64 of the shank 14, even if stress is concentrated on the connection surface 82, the connection surface 82 can be intentionally deformed slightly, so it is difficult for cracks to occur on the connection surface 82 of the shank 14. Therefore, according to the example of the embodiment of the present disclosure, even when the cutting tool 10 is provided with the sensor unit 46, the aging resistance of the cutting tool 10 can be further improved.

[0077] When the groove 64 of the shank 14 is open to the rear end surface 24, the wiring member 62 can be led out from the rear end 14b of the shank 14. Therefore, according to the example of the embodiment of the present disclosure, the wiring member 62 is unlikely to become an obstacle, and the cutting tool 10 is easily mounted on the tool holder 12.

[0078] <Method for manufacturing machined product>

[0079] Reference Figures 14 to 16 A method for producing a machined product according to an embodiment of the present disclosure will be described. Figures 14 to 16 It is a schematic diagram for explaining the method for producing a machined product according to an embodiment of the present disclosure.

[0080] like Figures 14 to 16 As shown in the example, the method for manufacturing a cut workpiece of the embodiment of the present disclosure is a method for manufacturing a cut workpiece W, i.e., a cut workpiece M, which has been cut, and includes a first step, a second step, and a third step. The first step refers to a step of rotating the cut workpiece W around its axis S. The second step refers to a step of bringing the cutting blade 16 of the cutting tool 10 into contact with the rotating cut workpiece W to cut the cut workpiece W. The third step refers to a step of separating the cutting tool 10 from the cut cut workpiece W. Examples of the material of the cut workpiece W include stainless steel, carbon steel, alloy steel, cast iron, or non-ferrous metal. The specific contents of the method for manufacturing a cut workpiece of the embodiment are as follows.

[0081] First, the cutting tool 10 is mounted on the tool holder 12, and the workpiece W is mounted on the chuck of the lathe. Fig.14 As shown in the example, the chuck is rotated to rotate the workpiece W around its axis S (first step). Fig.15 As shown in the example, the cutting tool 10 is moved in the arrow D1 direction to approach the workpiece W, and the cutting tip 16 is brought into contact with the rotating workpiece W to cut the workpiece W (second step). Thus, a machined surface Wf can be formed on the workpiece W.

[0082] Then, if Fig.16 As shown in the example, by moving the cutting tool 10 in the direction of the arrow D2, the cutting tool 10 is separated from the workpiece W (third step). As a result, the cutting process of the workpiece W is completed, and the workpiece W after the cutting process, that is, the machined product M can be manufactured. Since the cutting tool 10 has excellent cutting ability for the reasons described above, it is possible to manufacture the machined product M with excellent machining accuracy.

[0083] When the cutting process is continued, the cutting blade 16 can be repeatedly brought into contact with different parts of the workpiece W while the workpiece W is rotated. In the embodiment of the present disclosure, the cutting tool 10 is brought close to the workpiece W, but it is sufficient that the cutting tool 10 and the workpiece W are relatively close, so the workpiece W can also be brought close to the cutting tool 10. In this regard, the same is true when the cutting tool 10 and the workpiece W are separated.

[0084] In one embodiment, (1) a cutting tool comprises: a shank having a rod shape extending from a front end toward a rear end and having a front end face located on the front end side, an upper surface extending from the front end face toward the rear end, a lower surface located on the opposite side of the upper surface, a first side surface located between the upper surface and the lower surface and extending from the front end face toward the rear end, a second side surface located on the opposite side of the first side surface, and a tool groove opening on the front end face, the upper surface, and the first side surface; a cutting blade located in the tool groove and having a cutting edge; a sensor located on the outer surface of the shank on the front end side and detecting a physical quantity of the shank; and a wiring member electrically connected to the sensor and extending from the sensor side toward the rear end, the shank also having a groove opening on both the lower surface and the second side surface and extending from the front end side toward the rear end, the wiring member being located in the groove.

[0085] (2) In the cutting tool of (1), the wiring member may include: a wiring conductor electrically connected to the sensor and extending from the sensor side toward the rear end; and a cylindrical retaining member located in the groove, extending from the front end side toward the rear end and retaining the wiring conductor.

[0086] (3) In the cutting tool of (2), the retaining member may include: a first end face located on the side of the lower surface; and a second end face located on the side of the second side surface, and the distance from the upper surface to the first end face is less than the distance from the upper surface to the lower surface, and the distance from the first side surface to the second end face is less than the distance from the first side surface to the second side surface.

[0087] (4) In the cutting tool of (3), the groove may have: a first supporting surface connected to the second side surface; and a second supporting surface connected to the lower surface, and the retaining member may also have: a first abutting surface located on the opposite side of the first end surface and abutting the first supporting surface; and a second abutting surface located on the opposite side of the second end surface and abutting the second supporting surface.

[0088] (5) In the cutting tool according to (4), the first contact surface and the first support surface may be inclined relative to a virtual plane parallel to the lower surface so as to move away from the lower surface as they move away from the second side surface.

[0089] (6) In the cutting tool according to (4), the second contact surface and the second support surface may be inclined relative to a virtual plane orthogonal to the lower surface so as to be separated from the second side surface as they are separated from the lower surface.

[0090] (7) In the cutting tool described in any one of (4) to (6), the first support surface and the second support surface may be flat surfaces, and the groove may further include a connecting surface with a concave curved surface located between the first support surface and the second support surface.

[0091] (8) In the cutting tool according to (7) above, the wiring member may be separated from the connection surface.

[0092] (9) In any one of the cutting tools described in (1) to (8), in a cross section of the shank perpendicular to the longitudinal direction, a width of the groove in a direction parallel to the second side surface may be greater than a width of the groove in a direction parallel to the lower surface.

[0093] (10) In the cutting tool according to any one of (1) to (9), the groove may be located closer to the rear end than the groove.

[0094] (11) In the cutting tool described in any one of (1) to (10), the groove may be located closer to the second side surface than the groove.

[0095] (12) In the cutting tool described in any one of (1) to (11) above, the shank may further include a rear end surface located on the opposite side of the front end surface, and the groove may open to the rear end surface.

[0096] (13) A method for manufacturing a machined product comprising: a step of rotating a workpiece; a step of bringing a cutting tool of any one of (1) to (12) into contact with the rotating workpiece and cutting the workpiece; and a step of separating the cutting tool from the cut workpiece.

[0097] The inventions of each disclosure are described above based on the accompanying drawings and embodiments. However, the invention of the present disclosure is not limited to the aforementioned embodiments. That is, the invention of the present disclosure can be variously modified within the scope shown in the present disclosure, and the embodiments obtained by appropriately combining the technical solutions respectively disclosed in different embodiments are also included in the technical scope of the invention of the present disclosure. In other words, it should be noted that it is easy for those skilled in the art to make various deformations or modifications based on the present disclosure. In addition, it should be noted that these deformations or modifications are included in the scope of the present disclosure.

[0098] Description of Reference Numerals

[0099] 10Cutting tools

[0100] 12 knife holder

[0101] 12a Loading surface

[0102] 12b inner wall surface

[0103] 12c fixing screw

[0104] 14. Knife handle

[0105] 14a Front-end

[0106] 14b backend

[0107] 14m Main body

[0108] 16 cutting blades

[0109] 18 Clamp

[0110] 20 Clamping screw

[0111] 22 front face

[0112] 24 rear end

[0113] 26 Upper surface

[0114] 28 Lower surface

[0115] 30 First side

[0116] 32 Second side

[0117] 34 knife slots

[0118] 36 First blade surface

[0119] 38 Second blade surface

[0120] 40 blade side

[0121] 42 cutting edges

[0122] 44 through holes

[0123] 46 sensor units

[0124] 48-unit base

[0125] 48a First part

[0126] 48b Second part

[0127] 50 first recess

[0128] 52 second recess

[0129] 54Third recess

[0130] 56 First Sensor

[0131] 58 Second sensor

[0132] 60 Third sensor

[0133] 62 Wiring components

[0134] 64 slots

[0135] 66 first bearing surface

[0136] 68 second bearing surface

[0137] 70 Wiring conductor

[0138] 72Retaining member

[0139] 74 first end surface

[0140] 76 Second end face

[0141] 78 first contact surface

[0142] 80 second contact surface

[0143] 82 connection surface.

Claims

1. A cutting tool, wherein: The cutting tool has: A knife handle in the shape of a rod extending from a front end toward a rear end, and having a front end surface located on the side of the front end, an upper surface extending from the front end surface toward the rear end, a lower surface located on the opposite side of the upper surface, a first side surface located between the upper surface and the lower surface and extending from the front end surface toward the rear end, a second side surface located on the opposite side of the first side surface, and a knife groove opened on the front end surface, the upper surface, and the first side surface; A cutting blade, which is located in the blade groove and has a cutting edge; A sensor, which is located on the outer surface of the tool handle at the front end side and detects a physical quantity of the tool handle; as well as a wiring member electrically connected to the sensor and extending from the sensor side toward the rear end, The handle further comprises a groove which is open on both the lower surface and the second side surface and extends from the front end side toward the rear end. The wiring member is located in the groove.

2. The cutting tool according to claim 1, wherein: The wiring member has: a wiring conductor electrically connected to the sensor and extending from the sensor side toward the rear end; and A cylindrical holding member is located in the groove, extends from the front end side toward the rear end, and holds the wiring conductor.

3. The cutting tool according to claim 2, wherein: The retaining member has: a first end surface located on the side of the lower surface; and a second end surface, which is located on the second side surface, The distance from the upper surface to the first end surface is less than the distance from the upper surface to the lower surface, A distance from the first side surface to the second end surface is less than a distance from the first side surface to the second side surface.

4. The cutting tool according to claim 3, wherein: The groove has: a first supporting surface connected to the second side surface; and a second supporting surface connected to the lower surface, The retaining member also has: a first abutting surface located on the opposite side of the first end surface and abutting against the first supporting surface; and The second abutting surface is located on the opposite side of the second end surface and abuts against the second supporting surface.

5. The cutting tool according to claim 4, wherein: The first contact surface and the first support surface are each inclined with respect to a virtual plane parallel to the lower surface so as to be separated from the lower surface as they are separated from the second side surface.

6. The cutting tool according to claim 4, wherein: The second contact surface and the second support surface are each inclined with respect to a virtual plane perpendicular to the lower surface so as to be separated from the second side surface as they are separated from the lower surface.

7. The cutting tool according to any one of claims 4 to 6, wherein: The first supporting surface and the second supporting surface are respectively planes, The groove further includes a connecting surface in a concave curved shape located between the first supporting surface and the second supporting surface.

8. The cutting tool according to claim 7, wherein: The wiring member is separated from the connection surface.

9. The cutting tool according to any one of claims 1 to 8, wherein: In a cross section of the shank perpendicular to the length direction, A width of the groove in a direction parallel to the second side surface is greater than a width of the groove in a direction parallel to the lower surface.

10. The cutting tool according to any one of claims 1 to 9, wherein: The groove is located closer to the rear end than the sipe.

11. The cutting tool according to any one of claims 1 to 10, wherein: The groove is located closer to the second side surface than the sipe.

12. The cutting tool according to any one of claims 1 to 11, wherein: The handle further comprises a rear end face located on the opposite side of the front end face, The groove is open relative to the rear end surface.

13. A method for manufacturing a machined product, wherein: The method for manufacturing the machined product comprises: The process of rotating the workpiece; a step of bringing the cutting tool according to any one of claims 1 to 12 into contact with the rotating workpiece to cut the workpiece; and A step of separating the cutting tool from the cut workpiece.

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