WO2022230149A1 - 切削工具 - Google Patents
切削工具 Download PDFInfo
- Publication number
- WO2022230149A1 WO2022230149A1 PCT/JP2021/017101 JP2021017101W WO2022230149A1 WO 2022230149 A1 WO2022230149 A1 WO 2022230149A1 JP 2021017101 W JP2021017101 W JP 2021017101W WO 2022230149 A1 WO2022230149 A1 WO 2022230149A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- cutting tool
- substrate
- main body
- battery
- Prior art date
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- 238000005520 cutting process Methods 0.000 title claims abstract description 197
- 239000000758 substrate Substances 0.000 claims abstract description 123
- 238000004891 communication Methods 0.000 claims abstract description 37
- 230000001133 acceleration Effects 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000011347 resin Substances 0.000 description 11
- 229920005989 resin Polymers 0.000 description 11
- 239000000919 ceramic Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000003754 machining Methods 0.000 description 7
- 239000005060 rubber Substances 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
- B23B29/04—Tool holders for a single cutting tool
- B23B29/12—Special arrangements on tool holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
- B23Q17/0966—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring a force on parts of the machine other than a motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
- B23Q17/0985—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining by measuring temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2260/00—Details of constructional elements
- B23B2260/024—Batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2260/00—Details of constructional elements
- B23B2260/036—Cables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2260/00—Details of constructional elements
- B23B2260/128—Sensors
Definitions
- the present disclosure relates to cutting tools.
- a technique for grasping the state of a cutting tool by measuring the physical quantity of the cutting tool, for example, strain, with a sensor during machining by the cutting tool for example, Japanese Patent Application Laid-Open No. 2020-62746 (Patent Document 1).
- Patent Document 2 European Patent Application Publication No. 3292929 (Patent Document 2), European Patent Application Publication No. 3292930 (Patent Document 3), JP 2019-166600 A (Patent Document 4), International Publication No. 2014/154593 (Patent Document 5), JP-A-2007-30138 (Patent Document 6), International Publication No.
- Patent Document 7 2007/088197 (Patent Document 7), JP-A-3-294150 (Patent Document 8), JP-A-2012-20359 ( Patent Document 9), JP-A-2019-130635 (Patent Document 10), JP-A-2019-209420 (Patent Document 11), JP-A-2018-54612 (Patent Document 12), International Publication No. 2016/202569 No. (Patent Document 13), Japanese Patent Application Laid-Open No. 2009-285804 (Patent Document 14) and International Publication No. 2018/047834 (Patent Document 15)).
- a cutting tool is a cutting tool that cuts a workpiece by contacting the rotating workpiece.
- This cutting tool extends from the first end, which is the end on which the cutting tip for cutting the workpiece is installed, to the second end, which is the end opposite to the first end. It comprises a main body portion having an elongated rod-like shape, and a sensor portion arranged on the surface of the main body portion.
- the sensor unit includes a first sensor arranged on the surface of the main body and detecting a first physical quantity of the main body, a substrate arranged on the surface of the main body and electrically connected to the first sensor, a wireless communication unit mounted on a substrate and transmitting a signal including information of a first physical quantity detected by a first sensor to the outside; a battery disposed within a main unit and electrically connected to the substrate; including.
- a first sensor is positioned closer to the first end than the battery.
- FIG. 1 is a schematic perspective view showing the structure of a cutting tool.
- FIG. 2 is a schematic perspective view showing the structure of the cutting tool with the lid removed.
- FIG. 3 is a schematic plan view showing the structure of the cutting tool viewed from the first end side.
- FIG. 4 is a schematic plan view showing the structure of the cutting tool viewed from the second end side.
- FIG. 5 is a schematic cross-sectional view along line segment VV in FIG.
- FIG. 6 is a schematic cross-sectional view along line VI-VI in FIG.
- FIG. 7 is a schematic perspective view showing the structure of the turret.
- FIG. 8 is a schematic perspective view showing a state in which a cutting tool is held by the turret.
- FIG. 1 is a schematic perspective view showing the structure of a cutting tool.
- FIG. 2 is a schematic perspective view showing the structure of the cutting tool with the lid removed.
- FIG. 3 is a schematic plan view showing the structure of the cutting tool viewed from the first
- FIG. 9 is a schematic perspective view showing the structure of the cutting tool of Embodiment 2 with the lid removed.
- FIG. 10 is a schematic perspective view showing the structure of the cutting tool of Embodiment 3 with the lid removed.
- FIG. 11 is a schematic cross-sectional view along line XI-XI in FIG.
- FIG. 12 is a schematic perspective view showing the structure of the cutting tool of Embodiment 4 with the lid removed.
- FIG. 13 is a schematic plan view showing the structure of the cutting tool of Embodiment 4 with the lid removed.
- FIG. 14 is a schematic perspective view showing the structure of the cutting tool of Embodiment 5 with the lid removed.
- FIG. 15 is a schematic perspective view showing the structure of the cutting tool of Embodiment 6 with the lid removed.
- FIG. 16 is a schematic perspective view of the cutting tool of Embodiment 6 as seen from a different viewpoint from that of FIG.
- a sensor that detects a specific physical quantity is installed on the main body of the cutting tool, and the information on the physical quantity detected by the sensor is transmitted to the outside via the wireless communication unit.
- a battery for supplying power to the sensor and the wireless communication unit can be arranged in the main unit.
- the sensitivity of the sensor and the rigidity of the cutting tool may become insufficient during machining. It is an object of the present disclosure to achieve both the sensitivity of the sensor and the rigidity of the cutting tool while making it possible to grasp the state of the cutting tool during machining.
- the cutting tool of the present disclosure is a cutting tool that cuts a workpiece by contacting the rotating workpiece.
- This cutting tool extends from the first end, which is the end on which the cutting tip for cutting the workpiece is installed, to the second end, which is the end opposite to the first end. It comprises a main body portion having an elongated rod-like shape, and a sensor portion arranged on the surface of the main body portion.
- the sensor unit includes a first sensor arranged on the surface of the main body and detecting a first physical quantity of the main body, a substrate arranged on the surface of the main body and electrically connected to the first sensor, a wireless communication unit mounted on a substrate and transmitting a signal including information of a first physical quantity detected by a first sensor to the outside; a battery disposed within a main unit and electrically connected to the substrate; including.
- a first sensor is positioned closer to the first end than the battery.
- the first physical quantity detected by the first sensor is transmitted to the outside by the wireless communication unit. This makes it possible to grasp the state of the cutting tool during machining. Also, the first sensor is positioned closer to the first end than the battery. By arranging the first sensor close to the first end, which is the end on which the cutting tip is installed, the sensitivity of detection of the first physical quantity by the first sensor is increased. In order to arrange the battery inside the main body, it is necessary to form a space for housing the battery inside the main body. As a result, the rigidity of the main body is reduced in the area where the battery is arranged. On the other hand, the second end side of the cutting tool is often held by the holding mechanism of the machine tool.
- the battery closer to the second end than the first sensor, it is possible to suppress the influence of a decrease in rigidity of the cutting tool.
- the cutting tool of the present disclosure it is possible to achieve both the sensitivity of the sensor and the rigidity of the cutting tool while making it possible to grasp the state of the cutting tool during processing.
- the first sensor may be arranged on the first end side and the battery may be arranged on the second end side when viewed from the substrate.
- the sensor section may further include a second sensor arranged on the surface of the body section and detecting a second physical quantity of the body section. This configuration enables the sensor unit to detect a plurality of physical quantities.
- the first physical quantity may be strain.
- the second physical quantity may be at least one of acceleration and temperature. This configuration enables the sensor unit to detect strain and at least one of acceleration and temperature.
- the sensor section may further include second sensor wiring that connects the second sensor and the substrate.
- the wireless communication unit may transmit a signal including information on the second physical quantity detected by the second sensor to the outside.
- the second sensor may be arranged closer to the first end than the first sensor.
- Acceleration and temperature can be detected with high accuracy by detecting them at a position close to the cutting tip.
- strain can be accurately detected by detecting it at a position where the moment of the main body due to machining is large, that is, at a position some distance away from the cutting tip.
- the sensor unit further includes an AD converter that is arranged on the substrate, converts an analog signal containing information on the first physical quantity detected by the first sensor into a digital signal, and transmits the digital signal to the wireless communication unit.
- an AD converter that is arranged on the substrate, converts an analog signal containing information on the first physical quantity detected by the first sensor into a digital signal, and transmits the digital signal to the wireless communication unit. may contain.
- An analog signal containing information on the first physical quantity detected by the first sensor is transmitted to the first area, which is the area of the substrate to which the first sensor wiring is connected, and then converted into a digital signal by an AD converter. is transmitted to the wireless communication unit, and transmitted from the wireless communication unit to the outside. Therefore, by arranging the first section, the AD converter, and the wireless communication section in this order from the first end side toward the second end side in the longitudinal direction of the main body, the wiring pattern of the substrate can be changed. length can be reduced. As a result, it becomes possible to miniaturize the substrate.
- the body portion may have a rectangular cross section perpendicular to the longitudinal direction.
- a first concave portion may be formed on the first surface, which is the outer peripheral surface of the main body corresponding to one of the four sides of the quadrangle.
- the substrate and the wireless communication section may be arranged within the first recess.
- the first surface may be a surface corresponding to the side flank of the cutting tip among the outer peripheral surfaces of the main body corresponding to each side of the quadrangle.
- a cutting tool having a main body with a rectangular cross section perpendicular to the longitudinal direction has three outer peripheral surfaces corresponding to the four sides of the main body, other than the side corresponding to the side flank of the cutting tip. It is often held in contact with the holding mechanism of the machine tool. Therefore, by arranging the substrate and the wireless communication section in the first concave portion formed on the first surface corresponding to the side flank of the cutting tip, the signal transmitted from the wireless communication section is transmitted to the holding mechanism. transmitted to the outside without being blocked by
- the space inside the main body that houses the battery may be open on the first surface. This configuration makes it easy to replace the battery while the cutting tool is fixed to the holding mechanism of the machine tool.
- the cutting tool may further include a lid that covers the first recess.
- a lid that covers the first recess.
- At least part of the lid may be made of resin, rubber or ceramics.
- the lid can protect the substrate and the wireless communication section in the first recess without blocking the signal transmitted from the wireless communication section.
- the sensor section may further include battery wiring that connects the battery and the substrate, and first sensor wiring that connects the first sensor and the substrate.
- the first area, the area of the substrate to which the first sensor wiring is connected may be located closer to the first end than the second area, the area of the substrate to which the battery wiring is connected. .
- FIG. 1 is a schematic perspective view showing the structure of a cutting tool.
- FIG. 2 is a schematic perspective view showing the structure of the cutting tool with the lid removed.
- FIG. 3 is a schematic plan view showing the structure of the cutting tool viewed from the first end side.
- FIG. 4 is a schematic plan view showing the structure of the cutting tool viewed from the second end side.
- FIG. 5 is a schematic cross-sectional view along line segment VV in FIG.
- FIG. 6 is a schematic cross-sectional view along line VI-VI in FIG.
- a cutting tool 1 of the present embodiment includes a rod-shaped body portion 10 extending from a first end portion 10A to a second end portion 10B.
- body portion 10 in the present embodiment has a rectangular parallelepiped shape.
- the surface of the body portion 10 includes a first surface 11, a second surface 12, a third surface 13, a fourth surface 14, a fifth surface 15, and a sixth surface 16. I'm in.
- the first surface 11 includes a first region 11A, a third region 11C arranged on the first end portion 10A side of the first region 11A, and a step portion connecting the first region 11A and the third region 11C. and a second region 11B.
- a holding portion 19 that is a concave portion for holding the cutting tip 90 is formed in the first end portion 10A of the main body portion 10 .
- the holding portion 19 is opened in the third region 11C of the first surface 11, the fourth surface 14 and the fifth surface 15.
- a cutting tip 90 and a floor plate 81 are arranged on the holding portion 19 .
- the cutting tips 90 are stacked on the sole plate 81 .
- the body part 10 has a rectangular cross section perpendicular to the longitudinal direction.
- the cutting tip 90 includes a side flank 90A and a front flank 90B.
- the first surface 11 is a surface corresponding to the side flank 90A of the cutting tip 90 among the outer peripheral surfaces of the main body corresponding to each side of the quadrangle.
- a fixing portion 82 for fixing the cutting tip 90 is arranged on the fourth surface 14 near the first end portion 10A.
- the cutting tip 90 is held by being sandwiched between the sole plate 81 and the fixing portion 82 .
- the cutting tip 90 is detachably fixed by a rotatable fixing portion 82 .
- the cutting tool 1 is a cutting tool that cuts a rotating workpiece by bringing the cutting tip 90 into contact with the workpiece. That is, the cutting tool 1 is a cutting tool used for turning.
- the first surface 11 of the body portion 10 is formed with a first concave portion 11E extending over the first area 11A, the second area 11B and the third area 11C.
- a second recess 12E is formed in the second surface 12 .
- a battery housing portion 11F which is a space for housing a battery 61, is formed in the first region 11A of the first surface 11 on the second end portion 10B side as viewed from the first recess portion 11E.
- a battery 61 is housed in the battery housing portion 11F.
- the battery housing portion 11F is open on the first surface 11. As shown in FIG.
- the first substrate 51 is arranged in the first concave portion 11E.
- the first substrate 51 is arranged in the first recess 11E located in the first region 11A.
- a second substrate 52 is arranged in the second recess 12E.
- a third substrate 53 is arranged in the first concave portion 11E located in the third region 11C.
- Each of the first substrate 51, the second substrate 52, and the third substrate 53 includes a substrate body made of an insulating material such as resin, and a circuit pattern (made of a conductor such as copper) formed on the surface of the substrate body. not shown). 2 and 5, first recess 11E and second recess 12E are connected by first through hole 10D.
- a first through hole 10 ⁇ /b>D connecting the first surface 11 and the second surface 12 is formed in the main body 10 .
- the main body 10 includes the first surface 11 and the second surface 12 in the longitudinal direction of the main body 10 (the direction connecting the first end 10A and the second end 10B). includes a column portion 10E connecting both sides of the first through hole 10D.
- the first substrate 51 and the second substrate 52 are electrically connected by a flexible cable .
- the first board 51 , the second board 52 and the flexible cable 54 constitute the board module 50 .
- a first substrate 51 is a first portion of the substrate module 50 .
- a second substrate 52 is the second portion of the substrate module 50 .
- the flexible cable 54 is a connecting portion of the board module 50 .
- a flexible substrate may be employed as the connecting portion instead of the flexible cable 54 .
- a flexible cable 54 electrically connects the first substrate 51 and the second substrate 52 through the first through hole 10D.
- cables or substrates other than flexible cables and flexible substrates may be employed as the connecting portions.
- a first strain sensor 42 is arranged on the first surface 11 .
- the first strain sensor 42 is arranged in the first recess 11E located in the first area 11A of the first surface 11 .
- a second strain sensor 45 is arranged on the second surface 12 .
- the second strain sensor 45 is arranged inside the second recess 12E of the second surface 12 .
- An acceleration sensor 29 as a second sensor is arranged in the third area 11C of the first surface 11 .
- the acceleration sensor 29 is arranged inside the first recess 11E located in the third area 11C.
- a first strain sensor 42 and a second strain sensor 45 as first sensors detect strain as a first physical quantity of the body portion 10 .
- the acceleration sensor 29 as a second sensor detects acceleration as a second physical quantity of the main body 10 .
- Acceleration sensor 29 is arranged closer to first end 10A than first strain sensor 42 and second strain sensor 45 .
- a temperature sensor may be arranged in the third region 11C (on the third substrate 53 within the recess 11E). The temperature sensor is positioned closer to the first end 10A than the first strain sensor 42 and the second strain sensor 45. As shown in FIG.
- a wiring 43 as a first wiring (first sensor wiring) is connected to the first strain sensor 42 .
- the first strain sensor 42 and wiring 43 constitute the first strain sensor component 41 .
- a wiring 46 as a second wiring is connected to the second strain sensor 45 .
- the second strain sensor 45 and wiring 46 constitute the second strain sensor component 44 .
- An AD converter 31, a wireless communication section 32, a connector 33, a connector 35, a connector 37 and a connector 38 are mounted on the first substrate 51 (on the circuit pattern of the first substrate 51).
- Connector 35, connector 38, AD converter 31, wireless communication unit 32, connector 33, and connector 37 are arranged in this order from first end 10A to second end 10B.
- a connector 36 and a connector 34 are mounted on the second board 52 (on the circuit pattern of the second board 52). The connectors 36 and 34 are arranged in this order from the first end 10A to the second end 10B.
- the wiring 46 is connected to the connector 36. Thereby, the second strain sensor 45 is electrically connected to the second substrate 52 .
- a flexible cable 54 connects the connector 34 and the connector 33 . Thereby, the second substrate 52 and the first substrate 51 are electrically connected.
- the wiring 43 is connected to the connector 35 .
- the first strain sensor 42 is electrically connected to the first substrate 51 .
- the connectors 39 and 38 are connected by wiring 55 .
- the third substrate 53 and the first substrate 51 are electrically connected.
- a wiring 55 as a second sensor wiring electrically connects the acceleration sensor 29 and the first substrate 51 .
- the connector 37 and the battery 61 are connected by wiring 62 (battery wiring). Thereby, the battery 61 is electrically connected to the first substrate 51 .
- Battery 61 supplies power to AD converter 31 , wireless communication unit 32 , first strain sensor 42 , second strain sensor 45 and acceleration sensor 29 .
- the first strain sensor 42, the second strain sensor 45 and the acceleration sensor 29 are arranged closer to the first end 10A than the battery 61.
- the first strain sensor 42, the second strain sensor 45 and the acceleration sensor 29 are arranged on the first end 10A side, and the battery 61 is arranged on the second end 10B side.
- a first area a connector 35 is arranged which is an area of the first substrate 51 to which the wiring 43 (the wiring connecting the first strain sensor 42 and the first substrate 51) as the first sensor wiring is connected. area) is located closer to the first end 10A than the second area (the area where the connector 37 is arranged), which is the area of the first substrate 51 to which the wiring 62 as the battery wiring is connected. .
- the first to third substrates 51, 52, 53 arranged on the surface of the main body 10, the AD converter 31 mounted on them, the wireless communication unit 32 and the connectors 33 to 39, the first strain sensor component 41, the 2, the strain sensor component 44 , the acceleration sensor 29 and the wiring 55 constitute the sensor section 20 .
- a battery is employed as a power supply source
- the power supply source in the cutting tool of the present disclosure is not limited to a battery.
- the power supply source may be, for example, a battery incorporated in the main body as in the present embodiment, or may be a power supply module prepared separately from the cutting tool and connected to the cutting tool, It can be both.
- the cutting tool 1 includes a first lid 71 , a second lid 72 and a third lid 73 .
- the first lid 71 covers the first recess 11E.
- the second lid 72 covers the second recess 12E.
- the third lid 73 covers the battery housing portion 11F.
- the first lid 71 may be entirely made of resin, rubber or ceramics, or only partially made of resin, rubber or ceramics. If only a portion is made of resin, rubber or ceramics, the other portion of first lid 71 may be made of metal.
- the second lid 72 and the third lid 73 may be entirely made of resin, rubber or ceramics, or entirely made of metal.
- body portion 10 includes a first bottom wall 111 and a second bottom wall 112. As shown in FIG. The first bottom wall 111 and the second bottom wall 112 form a wall surface that defines the first recess 11E. The second bottom wall 112 has a smaller distance from the opening of the first recess 11E than the first bottom wall 111 does. The second bottom wall 112 surrounds the first bottom wall 111 when the first recess 11E is viewed in the depth direction. The first strain sensor 42 and the first substrate 51 are arranged on the first bottom wall 111 . The first lid 71 is arranged on the second bottom wall 112 and accommodated in the first recess 11E. The first lid 71 may be adhered to the body portion 10 .
- the body portion 10 includes a third bottom wall 121 and a fourth bottom wall 122.
- the third bottom wall 121 and the fourth bottom wall 122 form a wall surface that defines the second recess 12E.
- the fourth bottom wall 122 has a smaller distance from the opening of the second recess 12E than the third bottom wall 121 does.
- the fourth bottom wall 122 surrounds the third bottom wall 121 when the second recess 12E is viewed in the depth direction.
- the second strain sensor 45 and the second substrate 52 are arranged on the third bottom wall 121 .
- the second lid 72 is arranged on the fourth bottom wall 122 and housed in the second recess 12E. The second lid 72 may be adhered to the body portion 10 .
- main body 10 includes an annular fifth bottom wall 113 along the outer edge of battery housing portion 11F when planarly viewing battery housing portion 11F in the depth direction.
- the third lid 73 is arranged on the fifth bottom wall 113 and housed in the battery housing portion 11F.
- the third lid 73 may be fixed to the main body 10 by screws, magnets, or the like.
- the cutting tool 1 can be used by being fixed to the machine tool in various ways.
- the cutting tool 1 is fixed, for example, to a holding mechanism of a machine tool in the following manner.
- FIG. 7 is a schematic perspective view showing the structure of the turret.
- FIG. 8 is a schematic perspective view showing a state in which a cutting tool is held by the turret.
- the cutting tool 1 is held on the turret with the first lid 71, the second lid 72 and the third lid 73 attached.
- the first lid 71, the second lid 72 and the third lid 73 are shown removed.
- groove 141 for holding cutting tool 1 is formed in turret 140 as a holding mechanism included in a machine tool (not shown).
- the groove 141 is defined by a bottom wall 142 and a pair of side walls 143 rising from the bottom wall 142 .
- the bottom wall 142 is formed with screw holes 145A and 145C.
- a plurality of (two) screw holes 145A and 145C are formed.
- 145 A of screw holes and 145 C of screw holes are arranged side by side along the direction where the groove
- Cutting tool 1 is fixed in groove 141 of turret 140 using first fixing member 150, second fixing member 160 and screws 169A, 169C.
- the first fixing member 150 has a pair of end surfaces 155 having a trapezoidal shape and an upper surface 151 having a rectangular shape and arranged perpendicular to the pair of end surfaces 155 so as to connect the pair of end surfaces 155 . , bottom surface 152 , first side surface 153 and second side surface 154 .
- the side connected to the top surface 151 is shorter than the side connected to the bottom surface 152 .
- the second fixing member 160 has a pair of trapezoidal end faces 165 and a rectangular shape. It has a shape including one side 163 and a second side 164 .
- the side connected to the top surface 161 is longer than the side connected to the bottom surface 162 .
- Screw holes 165A, 165B, and 165C penetrating from the top surface 161 to the bottom surface 162 are formed in the second fixing member 160 .
- the screw holes 165A and 165C are arranged side by side so as to correspond to the screw holes 145A and 145C.
- first fixing member 150 is arranged such that bottom surface 152 is in contact with bottom wall 142 of turret 140 and first side surface 153 is in contact with side wall 143 of turret 140. be.
- the cutting tool 1 is positioned so that the third face 13 contacts the bottom wall 142 of the turret 140 and the second face 12 contacts the sidewall 143 of the turret 140 .
- the second locking member 160 is configured such that the first side 163 contacts the second side 154 of the first locking member 150 and the second side 164 contacts the fourth side 14 of the cutting tool 1 . placed in The second fixed member 160 is arranged such that the bottom surface 162 faces the bottom wall 142 of the turret 140 .
- Screws 169A and 169C pass through screw holes 165A and 165C of second fixing member 160, respectively, and are arranged to be inserted into screw holes 145AB and 145C of the turret.
- Screw 169B is inserted into screw hole 165B of second fixing member 160 .
- the distance between bottom surface 162 of second fixing member 160 and bottom wall 142 of turret 140 is reduced.
- the second fixing member 160 functions as a shim, and the cutting tool 1 is firmly fixed to the turret 140.
- the screw 169B is screwed into the screw hole 165B.
- the screw 169B passes through the screw hole 165B and its tip contacts the bottom wall 142 . Further screwing in the screw 169B causes the second fixing member 160 to move relative to the turret 140 so that the distance between the bottom surface 162 and the bottom wall 142 increases. Thereby, the second fixing member 160 can be easily removed. When the second fixing member 160 is removed, the fixing of the cutting tool 1 to the turret 140 is released and the cutting tool 1 can be easily removed from the turret 140 .
- a cutting tool 1 having a body portion 10 having a square cross section perpendicular to the longitudinal direction has cutting tips 90 on the outer peripheral surface of the body portion 10 corresponding to the four sides of the square. contact with the turret 140 or the second fixing member 160 on three surfaces (second surface 12, third surface 13 and fourth surface 14) other than the first surface 11 corresponding to the lateral flank 90A of maintained in a manner. Therefore, by arranging the first substrate 51 and the wireless communication unit 32 in the first concave portion 11E formed in the first surface 11, which is the surface corresponding to the side flank 90A of the cutting tip 90, wireless communication can be achieved. Signals emitted from unit 32 are transmitted outside without being blocked by turret 140 .
- a battery housing portion 11 ⁇ /b>F which is a space for housing the battery 61 , is open on the first surface 11 .
- the cutting tip 90 is mounted symmetrically with respect to a plane parallel to the first surface 11 and the third surface 13 of the main body 10 of the cutting tool 1, depending on the mode of use, the side flank 90A and the front flank The surface 90B is replaced.
- the surface of the body portion 10 corresponding to the surface of the cutting tip 90 that can function as the side flank 90A the surface that can also function as the front flank 90B
- the first substrate 51 and the wireless communication unit 32 may be arranged in a recess formed in any one of the substrates 13 . That is, in this case, the lateral flank of the cutting tip 90 means a surface that can function as a lateral flank.
- first strain sensors are provided on first surface 11 and second surface 12 of body portion 10, respectively. 42 and a second strain sensor 45 are arranged. This makes it possible to measure the strain in two directions of the cutting tool 1 (body portion 10).
- a first strain sensor 42 and a second strain sensor 45 are electrically connected to the first substrate 51 and the second substrate 52, which are connected to each other by a flexible cable 54, respectively.
- the wireless communication unit 32 transmits a signal including information on the strain of the body unit 10 detected by the strain sensor 45 and the strain of the main unit 10 to the outside.
- the first strain sensor 42 and the second strain Compactness can be achieved compared to the case where a wireless communication unit corresponding to each sensor 45 is installed.
- the cutting tool 1 of the present embodiment can measure the strain in two directions of the cutting tool 1 and achieve compactness.
- first recess 11E and second recess 12E are formed in first surface 11 and second surface 12, respectively.
- the first strain sensor 42 and the first substrate 51 are arranged inside the first recess 11E.
- the second strain sensor 45 and the second substrate 52 are arranged inside the second recess 12E.
- the cutting tool 1 of the present embodiment includes a first lid 71 and a second lid 72 that respectively cover the first recess 11E and the second recess 12E. It has The first strain sensor 42 and the second strain sensor 45 are arranged on the first bottom wall 111 and the third bottom wall 121 respectively. The first lid 71 and the second lid 72 are arranged on the second bottom wall 112 and the fourth bottom wall 122, respectively, and are located in the first recess 11E and the second recess 12E, respectively. Contained. With such a structure, the strain sensors 42, 45 are protected by the lids 71, 72, and the lids 71, 72 do not interfere with handling of the cutting tool 1 (for example, fixing the cutting tool 1 to the machine tool). suppressed. Moreover, when the lids 71 and 72 are adhered to the main body 10, it is easy to adhere them over a sufficient area.
- the first substrate 51 and the second substrate 52 are connected by a flexible cable 54 passing through the first through hole 10D connecting the first surface 11 and the second surface 12.
- structure is adopted.
- the body portion 10 includes a column portion 10E connecting both sides of the first through hole 10D so as to include the first surface 11 and the second surface 12. As shown in FIG. Due to the presence of this column portion 10E, it is easy to impart high rigidity to the cutting tool 1 (body portion 10).
- the first strain sensor 42, the second strain sensor 45 and the acceleration sensor 29 are arranged closer to the first end portion 10A than the battery 61 is. Detection of strain and acceleration by placing the first strain sensor 42, the second strain sensor 45 and the acceleration sensor 29 close to the first end 10A, which is the end on which the cutting tip 90 is installed. sensitivity is increased. On the other hand, since the turret 140 holds the area of the main body 10 in which the rigidity is lowered due to the formation of the battery housing portion 11F, the influence of the rigidity reduction of the cutting tool 1 is suppressed. As described above, the cutting tool 1 of the present embodiment achieves both the sensitivity of the sensor and the rigidity of the cutting tool while making it possible to grasp the state of the cutting tool 1 during machining.
- the acceleration sensor 29 is arranged closer to the first end portion 10A than the first strain sensor 42 and the second strain sensor 45 are. This makes it possible to detect acceleration and strain with high accuracy.
- the first area (the area where the connector 35 is arranged) of the first substrate 51, the AD converter 31 and the wireless communication unit 32 are arranged from the first end 10A side to the second end. They are arranged in this order toward the part 10B side. Thereby, the length of the wiring pattern of the first substrate 51 can be reduced. As a result, the size of the first substrate 51 can be reduced.
- FIG. 9 is a schematic perspective view showing the structure of the cutting tool of Embodiment 2 with the lid removed.
- FIG. 9 is a diagram corresponding to FIG. 2 in the first embodiment. 9 and 2, a cutting tool 1 according to Embodiment 2 basically has the same structure as cutting tool 1 according to Embodiment 1, and exhibits similar effects. However, the cutting tool 1 of Embodiment 2 differs from the cutting tool 1 of Embodiment 1 in the structures of the substrate module 50 and the body portion 10 .
- a board module 50 of Embodiment 2 is composed of an integrated flexible board.
- the board module 50 includes a first portion 57 arranged in the first recess 11E, a second portion 58 arranged in the second recess 12E, and the first portion 57 and the second portion 58 electrically connected to each other. and a connection 59 that connects to the .
- the first portion 57, the second portion 58, and the connecting portion 59 form an integral flexible substrate.
- a cutout portion 10G connecting the first concave portion 11E and the second concave portion 12E is formed by removing the corner portion where the first surface 11 and the second surface 12 are connected. formed.
- the connecting portion 59 is arranged on the bottom wall defining the notch portion 10G.
- the number of parts is reduced (specifically, the connectors 33 and 34 are omitted) compared to the cutting tool 1 of the first embodiment. can be achieved.
- the cutting tool 1 of the second embodiment it becomes easier to attach the substrate module 50 to the main body 10 than the cutting tool 1 of the first embodiment.
- the cutting tool 1 of Embodiment 2 it is possible to achieve miniaturization of the substrate module 50, reduction of the manufacturing cost, and the like.
- FIG. 10 is a schematic perspective view showing the structure of the cutting tool of Embodiment 3 with the lid removed.
- FIG. 11 is a schematic cross-sectional view along line XI-XI in FIG.
- FIG. 10 is a diagram corresponding to FIG. 2 of the first embodiment. 10 and 2, cutting tool 1 according to Embodiment 3 basically has the same structure as cutting tool 1 according to Embodiment 1, and exhibits similar effects.
- the cutting tool 1 of Embodiment 3 is different from the cutting tool 1 of Embodiment 1 in the connection mode between the first strain sensor 42 and the connector 35 by the wiring 43 constituting the first strain sensor component 41. ing.
- a third recess 11G is formed inside the first recess 11E of the body portion 10 of the third embodiment.
- the wiring 43 connects the first strain sensor 42 and the connector 35 on the first substrate 51 with slack. A portion of the wiring 43 corresponding to the slack is accommodated in the third recess 11G.
- the wiring 43 is made loose, so that the first strain sensor 42 can be easily installed without adjusting the length of the wiring 43 .
- FIG. 12 is a schematic perspective view showing the structure of the cutting tool of Embodiment 4 with the lid removed.
- FIG. 13 is a schematic plan view showing the structure of the cutting tool of Embodiment 4 with the lid removed. 12 is a diagram corresponding to FIG. 2 in Embodiment 1.
- FIG. 13 is a schematic plan view of the cutting tool 1 seen from a direction perpendicular to the third surface 13.
- FIG. 12 is a schematic perspective view showing the structure of the cutting tool of Embodiment 4 with the lid removed.
- FIG. 13 is a schematic plan view of the cutting tool 1 seen from a direction perpendicular to the third surface 13.
- the cutting tool 1 according to Embodiment 4 basically has the same structure as the cutting tool 1 according to Embodiment 1, and exhibits similar effects. However, the cutting tool 1 of Embodiment 4 differs from the cutting tool 1 of Embodiment 1 in the arrangement and connection state of the sensor.
- acceleration sensor 29 is omitted from cutting tool 1 of Embodiment 1, while third strain sensor 48 is added.
- a fourth concave portion 13E is formed on the third surface 13 of the main body portion 10 of the fourth embodiment.
- the body portion 10 is formed with a second through hole 10F that connects the fourth recess 13E and the first recess 11E.
- FIG. 12 shows a state in which part of the main body 10 is removed for the purpose of making the second through hole 10F visible.
- a wiring 49 as a third wiring is connected to the third strain sensor 48 .
- Third strain sensor 48 and wiring 49 constitute third strain sensor component 47 .
- the sensor section 20 according to Embodiment 4 includes the third strain sensor component 47 .
- the wiring 49 connects the third strain sensor 48 and a connector 59 mounted on the first substrate 51 through the second through hole 10F.
- the second through hole 10F may connect the fourth recess 13E and the second recess 12E.
- the wiring 49 may connect the third strain sensor 48 and the second substrate 52 through the second through hole 10F.
- the third strain sensor 48 is arranged on the third surface 13 without arranging the substrate on the third surface 13 .
- the size of the fourth recess 13E formed in the third surface 13 can be reduced.
- a decrease in rigidity of the cutting tool 1 (body portion 10) can be suppressed.
- the cutting tool 1 of the fourth embodiment may include a fourth lid (not shown) that covers the fourth recess 13E.
- the fourth lid is preferably accommodated in the fourth recess 13E, as in the case of the first to third lids 71-73.
- FIG. 14 is a schematic perspective view showing the structure of the cutting tool of Embodiment 5 with the lid removed. 14 is a diagram corresponding to FIG. 2 in Embodiment 1.
- FIG. 14 is a schematic perspective view showing the structure of the cutting tool of Embodiment 5 with the lid removed. 14 is a diagram corresponding to FIG. 2 in Embodiment 1.
- FIG. 14 is a schematic perspective view showing the structure of the cutting tool of Embodiment 5 with the lid removed. 14 is a diagram corresponding to FIG. 2 in Embodiment 1.
- the cutting tool 1 according to Embodiment 5 basically has the same structure as the cutting tool 1 according to Embodiment 1, and exhibits similar effects. However, the cutting tool 1 of Embodiment 5 differs from the cutting tool 1 of Embodiment 1 in the arrangement of sensors.
- the acceleration sensor 29 and the first strain sensor 42 of the cutting tool 1 of Embodiment 1 are omitted.
- the cutting tool 1 of Embodiment 5 includes only one strain sensor (second strain sensor 45).
- the wireless communication unit 32 transmits to the outside a signal including information on the strain of the main body unit 10 detected by the second strain sensor 45 .
- the substrate module 50 includes the first substrate 51 arranged on the first surface 11 and the second substrate 52 arranged on the second surface 12. .
- the first substrate 51 and the second substrate 52 are connected by a flexible cable 54 as a connecting portion.
- the cutting tool 1 of the present embodiment is a cutting tool capable of grasping the state of the cutting tool during processing while maintaining ease of handling.
- FIG. 15 is a schematic perspective view showing the structure of the cutting tool of Embodiment 6 with the lid removed.
- FIG. 15 is a diagram corresponding to FIG. 14 in the fifth embodiment.
- FIG. 16 is a schematic perspective view of the cutting tool of Embodiment 6 as seen from a different viewpoint from that of FIG.
- the cutting tool 1 according to Embodiment 6 basically has the same structure as the cutting tool 1 according to Embodiment 5, and exhibits similar effects. However, the cutting tool 1 of Embodiment 6 differs from the cutting tool 1 of Embodiment 5 in the arrangement of sensors.
- a fourth strain sensor 77 is added to the cutting tool 1 of the fifth embodiment. That is, the cutting tool 1 of Embodiment 6 includes two strain sensors.
- the third surface 13 is formed with a fifth recess 13F.
- a fourth substrate 91 is arranged in the fifth recess 13F.
- the fourth substrate 91 includes a substrate body made of an insulating material such as resin, and a circuit pattern (not shown) made of a conductor such as copper formed on the surface of the substrate body. including.
- the second recess 12E and the fifth recess 13F are connected by a third through hole 10H.
- the second board 52 and the fourth board 91 are electrically connected by a flexible cable 92 .
- the fourth board 91 and flexible cable 92 constitute the board module 50 .
- the fourth board 91 is the third part of the board module 50 .
- the flexible cable 92 is a connecting portion of the board module 50 .
- a flexible substrate may be employed as the connecting portion instead of the flexible cable 92 .
- a flexible cable 92 electrically connects the second substrate 52 and the fourth substrate 91 through the third through hole 10H.
- cables or substrates other than flexible cables and flexible substrates may be employed as the connecting portions.
- a fourth strain sensor 77 is arranged on the third surface 13 .
- a fourth strain sensor 77 is arranged in the fifth recess 13F located on the first surface 13 .
- a wiring 78 is connected to the fourth strain sensor 77 .
- a fourth strain sensor 77 and wiring 78 constitute a fourth strain sensor component 76 .
- a connector 66 is mounted on the second substrate 52 (on the circuit pattern of the second substrate 52) in addition to the fifth embodiment.
- a connector 67 and a connector 68 are mounted on the fourth board 91 (on the circuit pattern of the fourth board 91).
- the wiring 78 is connected to the connector 68 .
- the fourth strain sensor 77 is electrically connected to the fourth substrate 91 .
- a flexible cable 92 connects the connector 66 and the connector 67 .
- the second substrate 52 and the fourth substrate 91 are electrically connected.
- the second substrate 52 and the fourth substrate 91 arranged on the surface of the body portion 10, the connectors 66 to 68 mounted thereon, and the fourth strain sensor component 76 constitute the sensor portion 20.
- cutting tool 1 of Embodiment 6 may include a fifth lid (not shown) that covers fifth recess 13F.
- the fifth lid is preferably accommodated in the fifth concave portion 13F, similarly to the case of the first to third lids 71 to 73 described above.
- the body portion 10 includes a sixth bottom wall 131 and a seventh bottom wall 132 .
- the sixth bottom wall 131 and the seventh bottom wall 132 form a wall surface that defines the fifth recess 13F.
- the seventh bottom wall 132 has a smaller distance from the opening of the fifth recess 13F than the sixth bottom wall 131 does.
- the seventh bottom wall 132 surrounds the sixth bottom wall 131 when viewing the fifth recess 13 ⁇ /b>F in the depth direction.
- a fourth strain sensor 77 and a fourth substrate 91 are arranged on the sixth bottom wall 131 .
- the fifth lid is preferably disposed on the seventh bottom wall 132 and accommodated within the fifth recess 13F.
- the fifth lid may be adhered to the body portion 10 . Even when the structure of this embodiment is employed, it is possible to measure the strain of the cutting tool 1 in two directions and to achieve compactness, as in the case of the first embodiment.
- strain sensors may also be installed on the fourth face 14 .
- the strain sensor may be arranged on any one or more of the first to fourth surfaces, or may be arranged on all the surfaces.
- the substrates (the first portion, etc.) constituting the substrate module may be arranged on any one or more of the first to fourth surfaces, or may be arranged on all the surfaces. .
- the board module is arranged on two or more of the first to fourth surfaces has been described, but the board module is arranged on one of the first to fourth surfaces. may be placed only in The arrangement of these sensors and the configuration of the board module can be combined arbitrarily.
- one substrate (first portion, etc.) and one strain sensor constituting the substrate module may be arranged on three of the first to fourth surfaces, or may be arranged on four surfaces (all surfaces).
- one substrate (first portion, etc.) and one strain sensor constituting the substrate module may be arranged on three of the first to fourth surfaces, or may be arranged on four surfaces (all surfaces).
- the concave portions such as the first concave portion 11E, the second concave portion 12E, the third concave portion 11G, the fourth concave portion 13E, and the fifth concave portion 13F formed on the surface of the main body portion 10 are filled with a filler (for example, resin It may be filled with a filling material made of metal). Note that even when these recesses are filled with a filling material or when lids covering these recesses are installed, wall surfaces such as bottom walls and side walls that define the recesses constitute the surface of the main body 10. .
- a filler for example, resin It may be filled with a filling material made of metal
- light emitting diodes for displaying the state of operation of the cutting tool 1 are provided in the concave portions such as the first concave portion 11E and the second concave portion 12E formed on the surface of the main body portion 10.
- a light-emitting device such as a light-emitting device may be installed. This light emitting device may emit light, for example, when the sensor section 20 of the cutting tool is powered on. This light emitting device emits visible light.
- the lids such as the first lid 71 and the second lid 72 that cover the recess have translucency with respect to the light from the light emitting device.
- the lid covering the recess may be transparent to visible light.
- the light emitting device may be arranged in a recess different from the recess in which the sensor section 20 is accommodated.
- the recess may be molded with a material such as a resin that is translucent to the light from the light emitting device.
- 1 cutting tool 10 main body, 10A first end, 10B second end, 10D first through hole, 10E column, 10F second through hole, 10G notch, 10H third through hole, 11 first surface, 11A first region, 11B second region, 11C third region, 11E first concave portion, 11F battery accommodating portion, 11G third concave portion, 12 second surface, 12E second surface recessed portion 13 third surface 13E fourth recessed portion 13F fifth recessed portion 14 fourth surface 15 fifth surface 16 sixth surface 19 holding portion 20 sensor portion 29 acceleration sensor, 31 AD converter, 32 wireless communication unit, 33 to 39 connectors, 41 first strain sensor component, 42 first strain sensor, 43 wiring, 44 second strain sensor component, 45 second strain sensor, 46 wiring, 47 third strain sensor component, 48 third strain sensor, 49 wiring, 50 board module, 51 first board, 52 second board, 53 third board, 54 flexible cable, 55 wiring, 56 connector, 57 first part, 58 second part, 59 connection part, 61 battery, 62 wiring, 66 to 68 connector, 71 first lid, 72 second lid, 73
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
Description
加工中における切削工具の状態を把握するためには、切削工具の本体部に特定の物理量を検知するセンサを設置し、センサが検知した物理量の情報を無線通信部によって外部へと送信する構造を採用することができる。また、本体部内には、センサおよび無線通信部に電力を供給する電池を配置することができる。しかし、このような構造を採用した場合、加工時におけるセンサの感度や切削工具の剛性が不十分となる場合がある。加工時における切削工具の状態の把握を可能としつつ、センサの感度および切削工具の剛性を両立させることが、本開示の目的の1つである。
[本開示の効果]
[本開示の実施形態の説明]
[本願発明の実施形態の詳細]
(1)本体部の構造
図1は、切削工具の構造を示す概略斜視図である。図2は、蓋を取り外した状態における切削工具の構造を示す概略斜視図である。図3は、第1の端部側から見た切削工具の構造を示す概略平面図である。図4は、第2の端部側から見た切削工具の構造を示す概略平面図である。図5は、図2の線分V-Vに沿う概略断面図である。図6は、図1の線分VI-VIに沿う概略断面図である。
図2に示すように、第1の凹部11E内には、第1の基板51が配置されている。第1の基板51は、第1領域11Aに位置する第1の凹部11E内に配置されている。第2の凹部12E内には、第2の基板52が配置されている。第3領域11Cに位置する第1の凹部11E内に、第3の基板53が配置されている。第1の基板51、第2の基板52および第3の基板53のそれぞれは、樹脂などの絶縁体からなる基板本体と、基板本体の表面に形成される銅などの導電体製の回路パターン(図示しない)とを含む。図2および図5を参照して、第1の凹部11Eと第2の凹部12Eとは、第1の貫通孔10Dにより接続されている。本体部10には、第1の面11と第2の面12とを接続する第1の貫通孔10Dが形成されている。その結果、本体部10の長手方向(第1の端部10Aと第2の端部10Bとを繋ぐ方向)において、本体部10は、第1の面11と第2の面12とを含むように第1の貫通孔10Dの両側を繋ぐ柱部10Eを含んでいる。
図1および図2を参照して、切削工具1は、第1の蓋71と、第2の蓋72と、第3の蓋73とを備えている。第1の蓋71は、第1の凹部11Eを覆っている。第2の蓋72は、第2の凹部12Eを覆っている。第3の蓋73は、電池収容部11Fを覆っている。第1の蓋71は、全体が樹脂、ゴムまたはセラミックス製であってもよいし、一部のみが樹脂、ゴムまたはセラミックス製であってもよい。一部のみが樹脂、ゴムまたはセラミックス製である場合、第1の蓋71の他の部分は金属製であってもよい。第2の蓋72および第3の蓋73は、全体が樹脂、ゴムまたはセラミックス製であってもよいし、全体が金属製であってもよい。第2の蓋72および第3の蓋73は、一部のみが樹脂、ゴムまたはセラミックス製であり、他の部分が金属製であってもよい。図2および図6を参照して、本体部10は、第1の底壁111と、第2の底壁112と、を含む。第1の底壁111および第2の底壁112は、第1の凹部11Eを規定する壁面を構成する。第2の底壁112は、第1の底壁111よりも第1の凹部11Eの開口からの距離が小さい。第1の凹部11Eを深さ方向に見て、第2の底壁112は、第1の底壁111を取り囲む。第1のひずみセンサ42および第1の基板51は、第1の底壁111上に配置されている。第1の蓋71は、第2の底壁112上に配置されるとともに、第1の凹部11E内に収容されている。第1の蓋71は、本体部10に対して接着されていてもよい。
図1および図2を参照して、切削工具1の動作時においては、切削工具1は、回転する被加工物に切削チップ90にて接触することにより、被加工物を加工する。このとき、本体部10のひずみが、第1のひずみセンサ42および第2のひずみセンサ45により検知される。また、本体部10の加速度が、加速度センサ29により検知される。ひずみセンサ42,45および加速度センサ29が検知するひずみおよび加速度の情報を含む信号は、アナログ信号である。アナログ信号であるひずみおよび加速度の情報は、ADコンバータ31においてデジタル信号に変換された後、無線通信部32へと送信され、無線通信部32により外部へと送信される。ここで、第1の蓋71の全体または一部が樹脂、ゴムまたはセラミックス製であるため、無線通信部32は、第1の蓋71を通して外部へと信号を送信することができる。この信号は、外部において受信され、分析されることにより、本体部10の状態が把握される。
図2を参照して、本実施の形態の切削工具1においては、本体部10の第1の面11および第2の面12に、それぞれ第1のひずみセンサ42および第2のひずみセンサ45が配置されている。これにより、切削工具1(本体部10)の2方向のひずみを測定することができる。また、フレキシブルケーブル54により互いに接続された第1の基板51および第2の基板52に、それぞれ第1のひずみセンサ42および第2のひずみセンサ45が電気的に接続され、第1のひずみセンサ42および第2のひずみセンサ45が検知した本体部10のひずみの情報を含む信号を、無線通信部32が外部へと送信する。第1のひずみセンサ42および第2のひずみセンサ45が検知した本体部10のひずみの情報を含む信号を共通の無線通信部32で送信することにより、第1のひずみセンサ42および第2のひずみセンサ45それぞれに対応する無線通信部を設置する場合に比べてコンパクト化を達成することができる。このように、本実施の形態の切削工具1は、切削工具1の2方向のひずみを測定しつつコンパクト化を達成することができる。
次に、他の実施の形態である実施の形態2について説明する。図9は、蓋を取り外した状態における実施の形態2の切削工具の構造を示す概略斜視図である。図9は、実施の形態1における図2に対応する図である。図9および図2を参照して、実施の形態2における切削工具1は、基本的には実施の形態1の切削工具1と同様の構造を有し、同様の効果を奏する。しかし、実施の形態2の切削工具1は、基板モジュール50および本体部10の構造において実施の形態1の切削工具1とは異なっている。
次に、さらに他の実施の形態である実施の形態3について説明する。図10は、蓋を取り外した状態における実施の形態3の切削工具の構造を示す概略斜視図である。図11は、図10の線分XI-XIに沿う概略断面図である。図10は、実施の形態1の図2に対応する図である。図10および図2を参照して、実施の形態3における切削工具1は、基本的には実施の形態1の切削工具1と同様の構造を有し、同様の効果を奏する。しかし、実施の形態3の切削工具1は、第1のひずみセンサ部品41を構成する配線43による第1のひずみセンサ42とコネクタ35との接続態様において実施の形態1の切削工具1とは異なっている。
次に、さらに他の実施の形態である実施の形態4について説明する。図12は、蓋を取り外した状態における実施の形態4の切削工具の構造を示す概略斜視図である。図13は、蓋を取り外した状態における実施の形態4の切削工具の構造を示す概略平面図である。図12は、実施の形態1における図2に対応する図である。図13は、第3の面13に対して垂直な方向から見た切削工具1の概略平面図である。
次に、さらに他の実施の形態である実施の形態5について説明する。図14は、蓋を取り外した状態における実施の形態5の切削工具の構造を示す概略斜視図である。図14は、実施の形態1における図2に対応する図である。
次に、さらに他の実施の形態である実施の形態6について説明する。図15は、蓋を取り外した状態における実施の形態6の切削工具の構造を示す概略斜視図である。図15は、実施の形態5における図14に対応する図である。図16は、実施の形態6の切削工具を図15とは異なる視点から見た状態を示す概略斜視図である。
上記実施の形態では、加速度センサ29が第1の面11上に配置される場合(実施の形態1~3)および加速度センサ29が採用されない場合(実施の形態4)について説明した。しかし、加速度センサ29は、第1の面11のほか、第2の面12、第3の面13および第4の面14のうち1つ以上の面に配置されていてもよく、全ての面に配置されていてもよい。上記実施の形態では、ひずみセンサが第2の面のみに配置される場合(実施の形態5)、第1の面11および第2の面12に設置される場合(実施の形態1~3)、第2の面および第3の面に配置される場合(実施の形態6)、および第1の面11~第3の面13に設置される場合(実施の形態4)について説明した。しかし、ひずみセンサは、第4の面14にも設置されていてもよい。つまり、ひずみセンサは、第1~第4の面のうち、任意の1以上の面に配置されていればよく、全ての面に配置されていてもよい。また、基板モジュールを構成する基板(第1部分等)も、第1~第4の面のうち、任意の1以上の面に配置されていればよく、全ての面に配置されていてもよい。また、上記実施の形態においては、基板モジュールが第1~第4の面のうち2以上の面に配置される場合について説明したが、基板モジュールが第1~第4の面のうち1の面のみに配置されていてもよい。これらのセンサの配置と基板モジュールの構成とは、任意に組み合わせることができる。たとえば、基板モジュールを構成する基板(第1部分等)およびひずみセンサが1つずつ、第1~第4の面のうち3つの面に配置されていてもよいし、4つの面(全ての面)に配置されていてもよい。たとえば、基板モジュールを構成する基板(第1部分等)およびひずみセンサが1つずつ、第1~第4の面のうち3つの面に配置されていてもよいし、4つの面(全ての面)に配置されていてもよい。また、本体部10の表面に形成された第1の凹部11E、第2の凹部12E、第3の凹部11G、第4の凹部13Eおよび第5の凹部13Fなどの凹部は、充填材(たとえば樹脂製の充填材)によって埋められていてもよい。なお、これらの凹部が充填材によって埋められている場合や、これらの凹部を覆う蓋が設置された場合でも、凹部を規定する底壁、側壁などの壁面は、本体部10の表面を構成する。
Claims (10)
- 回転する被加工物に接触することによって前記被加工物を切削する切削工具であって、
前記被加工物を切削する切削チップが設置される側の端部である第1の端部から、前記第1の端部とは反対側の端部である第2の端部まで延びる棒状の形状を有する本体部と、
前記本体部の表面に配置されたセンサ部と、を備え、
前記センサ部は、
前記本体部の表面に配置され、前記本体部の第1の物理量を検知する第1のセンサと、
前記本体部の表面に配置され、前記第1のセンサと電気的に接続された基板と、
前記基板上に搭載され、前記第1のセンサが検知した前記第1の物理量の情報を含む信号を外部へと送信する無線通信部と、
前記本体部内に配置され、前記基板に電気的に接続された電池と、を含み、
前記第1のセンサは、前記電池よりも前記第1の端部の近くに配置される、切削工具。 - 前記基板から見て、前記第1のセンサは前記第1の端部側に配置され、前記電池は前記第2の端部側に配置される、請求項1に記載の切削工具。
- 前記センサ部は、前記本体部の表面に配置され、前記本体部の第2の物理量を検知する第2のセンサをさらに含む、請求項1または請求項2に記載の切削工具。
- 前記第1の物理量はひずみであり、
前記第2の物理量は加速度および温度の少なくとも一方である、請求項3に記載の切削工具。 - 前記第2のセンサは、前記第1のセンサよりも前記第1の端部の近くに配置される、請求項4に記載の切削工具。
- 前記センサ部は、前記基板上に配置され、前記第1のセンサが検知した前記第1の物理量の情報を含むアナログ信号をデジタル信号に変換して前記無線通信部へと送信するADコンバータをさらに含む、請求項1から請求項5のいずれか1項に記載の切削工具。
- 前記本体部は、長手方向に垂直な断面が四角形状の形状を有し、
前記四角形の4つの辺のうちの1つの辺に対応する前記本体部の外周面である第1の面には、第1の凹部が形成されており、
前記基板および前記無線通信部は、前記第1の凹部内に配置され、
前記第1の面は、前記四角形の各辺に対応する前記本体部の外周面のうち、前記切削チップの横逃げ面に対応する面である、請求項1から請求項6のいずれか1項に記載の切削工具。 - 前記電池を収容する前記本体部内の空間は、前記第1の面において開口している、請求項7に記載の切削工具。
- 前記切削工具は、前記第1の凹部を覆う蓋をさらに備える、請求項7または請求項8に記載の切削工具。
- 前記センサ部は、
前記電池と前記基板とを接続する電池配線と、
前記第1のセンサと前記基板とを接続する第1センサ配線と、をさらに含み、
前記第1センサ配線が接続される前記基板の領域である第1区域は、前記電池配線が接続される前記基板の領域である第2区域に比べて、前記第1の端部の近くに位置する、請求項1から請求項9のいずれか1項に記載の切削工具。
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