Turning tool unit

Abstract

This invention provides a turning tool unit that can achieve high rigidity while keeping the tool size down. [Solution] A turning tool unit comprising a turning tool and a tool holder block that is detachably attached to a turret of a machine tool and holds the turning tool, wherein the turning tool has a tool body extending along the tool axis, a cutting part having a cutting edge provided at the tip of one end of the tool body in the axial direction, and a sensor provided on the tool body for measuring the machined surface of the workpiece machined by the cutting part, and a flange provided at the base end of the other end of the tool body in the axial direction, the flange expanding outward in the tool radial direction intersecting the axial direction and connected to the tool holder block.

Description

Technical Field

[0001] The present invention relates to a turning tool unit.

Background Art

[0002] In recent years, the development of tools for cutting with various functions has been advanced. Patent Document 1 discloses a cutting tool provided with a distance sensor. By having a distance sensor in the cutting tool, the dimensions of the workpiece can be measured, the time required for measurement can be shortened, and efficient machining can be performed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, a tool as disclosed in Patent Document 1 may be mounted on a turret of a machine tool. When mounting such a tool on the turret, in order to suppress vibrations and the like from occurring in the tool during machining in the state where the tool is mounted on the turret, it is desirable to increase the rigidity of the tool. Further, in order to suppress an increase in the moment generated when the turret rotates during tool change, it is desirable to suppress an increase in the size of the tool.

[0005] In view of the above circumstances, an object of the present invention is to provide a turning tool unit capable of achieving high rigidity while suppressing an increase in size.

Means for Solving the Problems

[0006] One embodiment of the turning tool unit of the present invention comprises a turning tool and a tool holder block that is detachably attached to a turret of a machine tool and holds the turning tool, wherein the turning tool comprises a tool body extending along a tool axis, a cutting portion having a cutting edge provided at one end of the tool body in the axial direction, and a sensor provided on the tool body for measuring the machined surface of the workpiece machined by the cutting portion, wherein a flange is provided at the base end of the tool body on the other end in the axial direction, the flange expands outward in the tool radial direction intersecting the axial direction, and is connected to the tool holder block.

[0007] According to one embodiment of the turning tool unit of the present invention, the turning tool is mounted on the turret via a tool holder block. Since the turning tool is equipped with a flange that expands in diameter outward in the tool radial direction, the area of ​​the connection portion to the tool holder block can be increased, and the turning tool can be firmly connected to the tool holder block. As a result, it is possible to increase rigidity while keeping the size of the turning tool down.

[0008] In the turning tool unit described above, the tool holder block may include a holder body having a turret connection portion connected to the outer circumferential surface of the turret, and a tool connection portion provided on one side in the axial direction relative to the holder body and the turret, which expands in diameter outward in the radial direction of the tool relative to the holder body, and to which the flange is connected.

[0009] In this case, the tool holder block expands in diameter outward in the tool radial direction relative to the holder body and has a tool connection portion to which a flange is connected. Therefore, the area of ​​the connection portion with the turning tool can be increased on the tool holder block side as well, and the turning tool can be firmly connected to the tool holder block.

[0010] In the turning tool unit described above, the tool connection portion may extend inward in the radial direction of the turret with respect to the outer peripheral edge of the turret, with respect to the central axis of the turret.

[0011] In this case, since the tool connection extends inward in the radial direction of the turret relative to the outer edge of the turret, it is possible to increase the area of ​​the tool connection to which the flange of the turning tool is connected, while preventing the tool connection from spreading outward in the radial direction of the turret. Furthermore, by extending radially inward from the turret, the tool connection can contact the axially facing side of the turret. As a result, the moment acting on the connection between the tool holder block and the turret due to the cutting resistance applied to the cutting edge can be received at the tool connection, thereby increasing the rigidity of the tool holder block.

[0012] In the turning tool unit described above, the holder body may include a component housing section capable of housing electrical components electrically connected to the turning tool.

[0013] In this case, since the holder body has a component housing section, electrical components that are electrically connected to the turning tool can be housed in the component housing section, allowing for a compact configuration of the turning tool unit.

[0014] In the turning tool unit described above, the electrical component has an information display unit capable of displaying information, and the component housing unit comprises a housing recess that opens outward toward the holder body and houses the electrical component, and a cover that detachably closes the opening of the housing recess, wherein at least a portion of the cover may be made of a material that allows the information display unit of the electrical component housed in the housing recess to be visible from outside the component housing unit.

[0015] In this case, at least a portion of the cover of the component housing is made of a material that allows the information display section of the electrical component housed in the housing recess to be visible from the outside of the component housing, so that the information displayed on the information display section can be viewed while the turning tool unit is mounted on the turret.

[0016] In the turning tool unit described above, the electrical component includes a wireless communication module that transmits detection signals from the sensor, and at least a portion of the component housing may be made of a material through which radio waves from the wireless communication module can pass.

[0017] In this case, since at least a portion of the component housing is made of a material that allows radio waves from the wireless communication module to pass through, the detection signal from the distance sensor can be transmitted well to the outside of the turning tool unit.

[0018] In the turning tool unit described above, the holder body includes a pair of turret connection portions that protrude from the component housing portion on both sides of the turret in the circumferential direction, and the thickness of the turret connection portions in the turret radial direction may be smaller than the thickness of the component housing portion in the turret radial direction.

[0019] In this case, since the radial thickness of the pair of turret connection sections is smaller than the radial thickness of the component housing section, the bolts used to connect the tool holder block to the turret can be shortened, and the turning tool unit can be firmly connected to the turret.

[0020] In the turning tool unit described above, the flange is formed in a disc shape when viewed from the axial direction, and the portion of the outer peripheral edge of the flange that faces outward in the radial direction of the turret with respect to the central axis of the turret may be cut out so as to extend linearly in a direction intersecting the radial direction of the turret.

[0021] In this case, the portion of the flange's outer edge that faces outward in the turret's radial direction is cut out in a straight line, thus preventing the flange from becoming larger outward in the turret's radial direction.

[0022] One aspect of the turning tool unit of the present invention includes a tool body extending along a tool axis, a cutting portion provided at a tip portion on one axial side of the tool body and having a cutting edge, and a sensor provided on the tool body for measuring a machined surface of a workpiece machined by the cutting portion. A turning tool, and a tool holder block that is detachable from a turret of a machine tool and holds the turning tool. The tool holder block has a holder main body having a turret connection portion connected to an outer peripheral surface of the turret, and is provided on one axial side with respect to the holder main body and the turret, and expands in diameter outward in a tool diameter direction intersecting the axial direction with respect to the holder main body. It has a tool connection portion to which the turning tool is connected.

[0023] According to one aspect of the turning tool unit of the present invention, the turning tool is mounted on the turret via a tool holder block. Since the tool holder block has a tool connection portion that expands in diameter outward in the tool diameter direction with respect to the holder main body and to which a flange is connected, the area of the connection portion with the turning tool can be increased, and the turning tool can be firmly connected to the tool holder block. As a result, it is possible to achieve high rigidity while suppressing an increase in the size of the tool.

Effects of the Invention

[0024] According to the turning tool unit of one aspect of the present invention, it is possible to achieve high rigidity while suppressing an increase in size.

Brief Description of the Drawings

[0025] [Figure 1] It is a perspective view showing a state in which the turning tool unit of one embodiment of the present invention is mounted on a turret. [Figure 2] It is a perspective view of the turning tool unit of one embodiment of the present invention. [Figure 3] It is a perspective view of the turning tool unit of one embodiment of the present invention as viewed from a direction different from that of FIG. 2. [Figure 4] It is a sectional view of a part of the turning tool unit of one embodiment of the present invention. [Figure 5]This is a perspective view of a turning tool according to one embodiment of the present invention. [Figure 6] This is a perspective view of a turning tool according to one embodiment of the present invention, viewed from a different direction than in Figure 5. [Figure 7] This is a perspective view showing the tool body of a turning tool according to one embodiment of the present invention. [Figure 8] This is a perspective view of a tool holder block of one embodiment of the present invention. [Figure 9] This is a view of a tool holder block of one embodiment of the present invention, seen from the other side in the axial direction. [Modes for carrying out the invention]

[0026] The turning tool unit according to an embodiment of the present invention will be described below with reference to the drawings. In the following drawings, the scale and number of components in each component may differ from the actual structure in order to make the components easier to understand.

[0027] <Turning tool unit> Figure 1 is a perspective view showing a turning tool unit 200 of one embodiment of the present invention mounted on a turret 301. As shown in Figure 1, the turning tool unit 200 of this embodiment is detachable from the turret 301 of the machine tool 300. The turret 301 is rotatable around its rotation axis C. Multiple tool holding grooves 303, to which the tool holder block 210 described later can be attached, are formed on the outer circumference of the turret 301 at intervals in the circumferential direction around the rotation axis C of the turret 301. Each of the multiple tool holding grooves 303 is recessed inward in the turret radial direction Drt from the turret outer surface 301f, which faces outward in the turret radial direction Drt around the rotation axis C, on the outer circumference of the turret 301. By rotating the turret 301 around the rotation axis C, the machine tool 300 appropriately selects one of the turning tool units 200 attached to each of the multiple tool holding grooves 303 and moves it to a position facing the workpiece 100 (see Figure 4), and performs turning operations such as boring on the workpiece 100.

[0028] Figure 2 is a perspective view of a turning tool unit 200 according to one embodiment of the present invention. Figure 3 is a perspective view of the turning tool unit 200 according to one embodiment of the present invention, viewed from a different direction than in Figure 2. Figure 4 is a cross-sectional view of a part of the turning tool unit 200 according to one embodiment of the present invention. As shown in Figures 1 to 4, the turning tool unit 200 comprises a turning tool 1 and a tool holder block 210.

[0029] <Turning Tools> The turning tool 1 of this embodiment performs turning operations such as boring on a workpiece 100, such as a metal material, that is rotated around a spindle. The turning tool 1 is connected to a tool holder block 210. The turning tool 1 of this embodiment is made of metal and comprises a tool body 2, a cutting insert (cutting part) 4, and a head unit 7.

[0030] As shown in Figures 2 to 4, the tool body 2 extends in the axial direction Dj along the tool axis J. The tool body 2 has a cylindrical shaft portion 21 centered on the tool axis J, a head portion 22 provided on one side Dj1 of the axial direction Dj of the tool body 2 relative to the shaft portion 21, and a flange 24 provided on the other side Dj2 of the axial direction Dj of the tool body 2 relative to the shaft portion 21.

[0031] Figure 5 is a perspective view of a turning tool 1 according to one embodiment of the present invention. As shown in Figures 2, 4, and 5, the head portion 22 has a projection 23 that protrudes outward from the outer circumferential surface of the shaft portion 21 in the tool radial direction Dr of the tool body 2, intersecting the axial direction Dj. The projection 23 is provided with a mounting recess 23z that is recessed inward in the tool radial direction Dr centered on the tool axis J. As shown in Figure 5, the mounting recess 23z opens in three directions: outward in the tool radial direction Dr, one side Dj1 in the axial direction Dj, and one side of the width direction Dw intersecting the tool radial direction Dr and the axial direction Dj. The mounting recess 23z has a base 23d facing outward in the tool radial direction Dr, a recess rear end surface 23b facing one side Dj1 in the axial direction Dj, and a recess side surface 23s facing one side of the width direction Dw.

[0032] As shown in Figures 2 to 5, a cartridge 41 is attached to the base 23d. The cartridge 41 holds the cutting insert 4. The cartridge 41 is block-shaped and is provided along the base 23d and the recessed side surface 23s. The cartridge 41 is fastened and fixed to the base 23d by bolts 43. The cutting insert 4 is detachably attached to the base 23d as part of the cartridge 41. Alternatively, the cutting insert 4 may be directly attached to the base 23d. The cartridge 41 is provided at a distance Dj1 on one side in the axial direction Dj relative to the rear end surface 23b of the recess. In the tool body 2, the cutting insert 4 is positioned on the first side Dr1 in the tool radial direction Dr with respect to the tool axis J.

[0033] The cutting insert 4 has a rhombic shape when viewed from the thickness direction. The cutting insert 4 has a pair of rhombic main surfaces in plan view facing the thickness direction, and a side surface connecting the pair of main surfaces. A cutting edge 42 is provided on the ridge between the main surface and the side surface of the cutting insert 4. The cutting edge 42 is provided at the tip of one side Dj1 in the axial direction Dj of the tool body 2. A portion of the cutting edge 42 protrudes from the tool body 2 to one side Dj1 in the axial direction Dj. The cutting edge 42 also protrudes outward from the tool body 2 in the tool radial direction Dr. Therefore, a portion of the cutting edge 42 is located at the very tip of one side Dj1 in the axial direction Dj of the tool body 2, and at the outermost end of the tool radial direction Dr.

[0034] According to this embodiment, the cutting insert 4 is fixed to the tool body 2 via a cartridge 41. Therefore, by changing the cartridge 41, cutting inserts 4 of various shapes can be fixed to the tool body 2, increasing the versatility of the tool body 2.

[0035] As shown in Figure 5, a nozzle hole 26 is provided on the rear end surface 23b of the mounting recess 23z for ejecting coolant supplied from outside the turning tool 1. An inclined surface 23k is formed on the rear end surface 23b of the recess at a position that protrudes to one side Dw1 in the width direction Dw relative to the cutting insert 4. The inclined surface 23k is inclined so as it moves away from the cutting insert 4 to one side Dw1 in the width direction Dw, it extends from the other side Dj2 in the axial direction Dj to one side Dj1. The nozzle hole 26 is formed to open into the inclined surface 23k. The nozzle hole 26 is inclined from the other side Dj2 in the axial direction Dj towards one side Dj1, and towards the other side Dw2 in the width direction Dw (the direction approaching the cutting insert 4 in the width direction Dw), and ejects coolant toward the cutting insert 4.

[0036] Figure 6 is a perspective view of the turning tool 1 of one embodiment of the present invention, viewed from a different direction than in Figure 5. Figure 7 is a perspective view showing the tool body 2 of the turning tool 1 of one embodiment of the present invention. As shown in Figures 4, 6, and 7, the head portion 22 has a mounting recess 25 on the second side Dr2 in the tool radial direction Dr with respect to the tool axis J, to which the head unit 7 is attached. The mounting recess 25 is formed on the first surface 22a of the head portion 22, facing outward (second side Dr2) in the tool radial direction Dr of the tool body 2. The mounting recess 25 is formed by recessing inward from the first surface 22a in the tool radial direction Dr. The mounting recess 25 has a bottom surface 25b, a pair of side wall surfaces 25s, and a body end surface 25t.

[0037] As shown in Figure 7, the bottom surface 25b is a flat surface facing outward (second side Dr2) in the tool radial direction Dr of the tool body 2. The bottom surface 25b is located inward in the tool radial direction Dr than the first surface 22a. The pair of side wall surfaces 25s are formed on a pair of wall portions 2w that form part of the tool body 2. The pair of wall portions 2w rise outwards from both sides of the width direction Dw of the mounting recess 25, which intersects the axial direction Dj and the tool radial direction Dr at the bottom surface 25b, in the direction of the tool radial direction Dr. The pair of side wall surfaces 25s are flat surfaces facing inwards in the width direction Dw at each of the pair of wall portions 2w.

[0038] As shown in Figures 4 and 7, the main body end face 25t is formed at a predetermined distance from the tip 22s of one side Dj1 in the axial direction Dj of the head portion 22 to the other side Dj2 in the axial direction Dj. The main body end face 25t is formed on the other side Dj2 in the axial direction Dj with respect to the bottom surface 25b. The main body end face 25t connects the ends of the other side Dj2 in the axial direction Dj of the pair of side wall surfaces 25s. The main body end face 25t is a flat surface facing one side Dj1 in the axial direction Dj.

[0039] As shown in Figures 4 and 6, the head unit 7 is detachably mounted in the mounting recess 25 of the head portion 22. The head unit 7 comprises a holder member 70, a base member 77 (see Figure 4), a sensor device 3, an imaging device 5, and an illumination device 6. The head unit 7 is positioned on the second side Dr2 in the tool radial direction Dr with respect to the tool axis J in the tool body 2. In other words, the head unit 7 is positioned on the opposite side of the tool axis J from the base 23d and the cutting insert 4 attached to the base 23d in the tool radial direction Dr of the tool body 2.

[0040] The holder member 70 is provided within the mounting recess 25. The holder member 70 is detachably attached to the tool body 2. As shown in Figure 4, the holder member 70 integrally comprises an outer peripheral wall portion 71 and a cylindrical wall portion 72.

[0041] The outer peripheral wall portion 71 faces outward (second side Dr2) in the tool radial direction Dr of the tool body 2. The outer peripheral wall portion 71 closes the space between the pair of wall portions 2w and forms a part of the outer peripheral surface of the tool body 2. When viewed from the second side Dr2 in the tool radial direction Dr, the outer peripheral wall portion 71 has a rectangular shape.

[0042] The cylindrical wall portion 72 extends inward (first side Dr1) in the tool radial direction Dr. from the outer peripheral edge of the outer peripheral wall portion 71. The tip surface of the cylindrical wall portion 72 on the first side Dr1 in the tool radial direction Dr abuts against the bottom surface 25b of the mounting recess 25. When viewed from the first side Dr1 in the tool radial direction Dr, the cylindrical wall portion 72 has a rectangular shape.

[0043] The holder member 70 has a recess 70s on the inside of the cylindrical wall portion 72. The recess 70s is formed by being surrounded by the outer peripheral wall portion 71 and the cylindrical wall portion 72. The recess 70s opens to the first side Dr1 in the tool radial direction Dr. The recess 70s is recessed from the tip surface of the cylindrical wall portion 72 to the second side Dr2 in the tool radial direction Dr.

[0044] The base member 77 is provided parallel to the bottom surface 25b of the mounting recess 25. The base member 77 is plate-shaped and intersects the tool radial direction Dr. The camera 51 and the lighting device 6, which will be described later, are fixed to the base member 77. As shown in Figures 5 and 6, the base member 77 is attached to the head portion 22 together with the holder member 70 by set screws 75. The set screws 75 are, for example, grub screws.

[0045] As shown in Figures 3 and 6, the sensor device 3 comprises a first distance sensor 31 and a second distance sensor 32. In this embodiment, the first distance sensor 31 and the second distance sensor 32 measure, as a physical quantity, the distance to the machined surface 100f (see Figure 4) machined using the cutting insert 4. In this embodiment, the first distance sensor 31 and the second distance sensor 32 are eddy current sensors. In this embodiment, the case in which the sensors provided on the tool body 2 as part of the head unit 7 are distance sensors (first distance sensor 31 and second distance sensor 32) has been described. However, the sensors provided on the tool body 2 may be other sensors (for example, image sensors) as long as they are capable of measuring the machined surface 100f.

[0046] The first distance sensor 31 and the second distance sensor 32 are positioned with their respective tips facing the object to be measured. The first distance sensor 31 and the second distance sensor 32 generate a high-frequency magnetic field by passing a high-frequency current through them. This causes eddy currents to flow on the surface of the object to be measured (machined surface 100f), which is a conductor, and the impedance in the coils inside the first distance sensor 31 and the second distance sensor 32 changes. The first distance sensor 31 and the second distance sensor 32 determine the distance to the object to be measured from this change in impedance. The first distance sensor 31 and the second distance sensor 32 output the change in impedance as a voltage (in volts). The output values ​​of the first distance sensor 31 and the second distance sensor 32 are converted to the distance to the object to be measured using a pre-calculated calibration formula. Eddy current sensors tend to maintain stable measurement accuracy even with external disturbances such as the surrounding environment. For this reason, eddy current sensors are suitable for distance measurement in environments with many external disturbances after machining, regardless of whether wet machining or dry machining is selected, compared to optical distance sensors.

[0047] The tip of the first distance sensor 31 is positioned facing outward in the tool radial direction Dr from the outer circumferential surface of the tool body 2. The first distance sensor 31 measures the distance to the object to be measured, which is positioned outside the tool radial direction Dr of the tool body 2. In other words, the first distance sensor 31 measures outward in the tool radial direction Dr. The first distance sensor 31 measures the distance to the machined surface 100f, which is machined by the cutting insert 4 and faces inward in the tool radial direction Dr.

[0048] The tip of the second distance sensor 32 is positioned facing one side Dj1 in the axial direction Dj from the tip 22s 22s of the head portion 22 of the tool body 2. The second distance sensor 32 measures the distance to the object to be measured, which is located on one side Dj1 in the axial direction Dj of the tool body 2. In other words, the second distance sensor 32 measures in the direction of one side Dj1 in the axial direction Dj. The second distance sensor 32 measures the distance to the machined surface 100f, which is machined by the cutting insert 4 and faces the other side Dj2 in the axial direction Dj.

[0049] The first distance sensor 31 and the second distance sensor 32 are used to measure the machined surface 100f after the turning tool 1 has formed the machined surface 100f. Since the first distance sensor 31 and the second distance sensor 32 are provided on the tool body 2, the machined surface 100f after cutting can be measured without separating the turning tool 1 from the workpiece 100. This reduces the time required to measure the machined surface 100f in turning. Furthermore, the first distance sensor 31 can be used to measure the distance to the machined surface 100f facing inward in the tool radial direction Dr, which has been machined by the cutting insert 4, and the second distance sensor 32 can be used to measure the distance to the machined surface 100f facing the other side Dj2 in the axial direction Dj, which has been machined by the cutting insert 4. In other words, during dimensional measurement, dimensions of surfaces facing different directions can be measured without changing the orientation of the workpiece 100, further reducing the time required for the measurement process. The first distance sensor 31 can measure the outer diameter, inner diameter, and roundness of the cutting insert 4. The second distance sensor 32 can measure the axial position of the stepped portion and the bottom of the hole in the cutting insert 4.

[0050] The imaging device 5 is mounted on the head unit 7 of the tool body 2. The imaging device 5 is positioned on the other side Dj2 of the axial direction Dj, with the tool axis J in between, relative to the sensor device 3. The imaging device 5 includes a camera 51 and a lens cover 53 (see Figure 6).

[0051] The camera 51 is, for example, a waterproof CMOS image sensor or a CCD image sensor. As shown in Figure 4, the camera 51 is fixed to the base member 77. The camera 51 has a lens section that faces the object to be photographed. The lens section has a built-in lens (not shown) in the camera 51. The camera 51 is positioned with the lens section facing outward in the tool radial direction Dr.

[0052] The camera 51 is positioned to capture images of the outside of the tool body 2 in the tool radial direction Dr through a camera opening (not shown) formed in the outer peripheral wall portion 71. The camera opening is covered by a lens cover 53. The lens cover 53 is made of a light-transmitting resin material, glass material, etc. The camera 51 captures images of the machined surface 100f, the so-called inner diameter surface, of the workpiece 100 that has been machined by the cutting insert 4, which faces inward in the tool radial direction Dr.

[0053] The camera 51 is positioned on the other side Dj2 in the axial direction Dj relative to the cutting insert 4 which is attached to the base 23d. However, it is preferable to position the camera 51 as close as possible to the machining position of the machined surface 100f by the cutting insert 4 in the axial direction Dj. This allows the state of the machined surface 100f after machining to be photographed from a closer position. Alternatively, if the sensor device 3 is positioned in a different location than described above, the camera 51 may be positioned in the same position in the axial direction Dj relative to the cutting insert 4. This allows the machined surface 100f to be photographed from a closer position during or after machining by the cutting insert 4.

[0054] As shown in Figures 3 and 6, the lighting device 6 is provided on the head unit 7 of the tool body 2. The lighting device 6 illuminates the workpiece surface 100f, which is photographed by the camera 51. In this embodiment, the lighting device 6 comprises a first lighting device 6A and a second lighting device 6B. The first illumination device 6A is positioned on the other side Dj2 of the axial direction Dj relative to the camera 51 of the imaging device 5. The second illumination device 6B is positioned in the axial direction Dj, overlapping with the camera 51 of the imaging device 5. In this embodiment, the second illumination device 6B is positioned on both sides of the camera 51 in the circumferential direction. The second illumination device 6B may be positioned on only one side of the camera 51 in the circumferential direction. Each of the first illumination device 6A and the second illumination device 6B is equipped with a light source, such as an LED.

[0055] As shown in Figure 6, an inclined portion 71k is formed on the outer peripheral wall portion 71 of the holder member 70. The inclined portion 71k is formed on one side Dj1 in the axial direction Dj with respect to the first illumination device 6A. The inclined portion 71k extends inclined toward the first side Dr1 in the tool radial direction Dr toward the other side Dj2 in the axial direction Dj from the imaging device 5. As a result, a stepped surface 71d facing one side Dj1 in the axial direction Dj is formed between the outer peripheral surface of the outer peripheral wall portion 71 and the tip of the inclined portion 71k. The first illumination device 6A is provided on the stepped surface 71d. Illumination light from the first illumination device 6A is irradiated toward one side Dj1 in the axial direction Dj. Illumination light from the first illumination device 6A is reflected off the surface of the inclined portion 71k and irradiated toward the outer machining surface 100f in the tool radial direction Dr.

[0056] Furthermore, the outer peripheral wall portion 71 of the holder member 70 is provided with light source housing recesses 78 on both sides in the circumferential direction relative to the camera opening. Each light source housing recess 78 is recessed inward from the outer peripheral surface of the outer peripheral wall portion 71 in the tool radial direction Dr. The light source of the second illumination device 6B is housed in each light source housing recess 78. Each light source housing recess 78 is provided with a cover (not shown) to cover the light source. The illumination light from the light source of the second illumination device 6B is irradiated onto the outer machining surface 100f in the tool radial direction Dr at a position where it overlaps with the camera 51 in the axial direction Dj.

[0057] As shown in Figures 2 to 6, the flange 24 is provided at the base end of the other side Dj2 in the axial direction Dj on the tool body 2. The flange 24 expands in diameter outward in the tool radial direction Dr relative to the shaft portion 21. The flange 24 is formed in a disc shape when viewed from the axial direction Dj, and the portion 24b of the outer edge of the flange 24 that faces outward in the turret radial direction Drt is cut out so as to extend linearly in the width direction Dw (a direction intersecting the turret radial direction Drrt). As shown in Figures 2 to 4, the tool body 2 of the turning tool 1 is connected to the tool holder block 210 by fastening a plurality of bolts 90 with the flange 24 abutting against the tool holder block 210. In this embodiment, the bolt axis direction of the plurality of bolts 90 is parallel to the axial direction Dj of the tool axis J.

[0058] As shown in Figures 4, 6, and 7, a cylindrical portion 24c is provided in the center of the flange 24, projecting outwards to the other side Dj2 in the axial direction Dj.

[0059] As shown in Figure 4, a housing hole 27 is formed inside the tool body 2. The housing hole 27 extends within the tool body 2 from one side Dj1 in the axial direction Dj to the other side Dj2, inclined from the outside to the inside in the tool radial direction Dr. As shown in Figures 4 and 7, the housing hole 27 extends beyond the body end face 25t towards one side Dj1 in the axial direction Dj. The housing hole 27 opens outward in the tool radial direction Dr at a portion of the other side Dj2 of the bottom surface 25b between a pair of side wall surfaces 25s. The housing hole 27 also opens towards one side Dj1 in the axial direction Dj at a portion of the first side Dr1 in the tool radial direction Dr of the body end face 25t. The housing hole 27 opens towards the other side Dj2 in the axial direction Dj through the cylindrical portion 24c.

[0060] As shown in Figure 4, the housing hole 27 houses wiring 80 connected to the first distance sensor 31, the second distance sensor 32, the camera 51, the light source of the first illumination device 6A, and the light source of the second illumination device 6B, respectively. The wiring 80 extends to the other side Dj2 in the axial direction Dj and is led into the tool holder block 210, which will be described later, via a cable (not shown). Furthermore, an internal circuit board 85 connected to the wiring 80 is housed within the housing hole 27. The internal circuit board 85 includes an AD converter that converts analog electrical signals detected by the first distance sensor 31 and the second distance sensor 32 into digital electrical signals, a camera interface (not shown) that exchanges signals with the camera 51, and the like.

[0061] <Tool holder block> Figure 8 is a perspective view of a tool holder block 210 according to one embodiment of the present invention. Figure 9 is a view of the tool holder block 210 according to one embodiment of the present invention from the other side Dj2 in the axial direction Dj. As shown in Figure 1, the tool holder block 210 is detachably attached to the turret 301 of the machine tool 300 and holds the turning tool 1. As shown in Figures 4, 8, and 9, the tool holder block 210 has a holder body 211 and a tool connection part 212.

[0062] The holder body 211 has a component housing portion 215, a turret connection portion 213, and a turret engagement portion 214. As shown in Figure 8, the component housing portion 215 has a peripheral wall portion 218 extending in the tool radial direction Dr, and a bottom plate portion 219 that closes the other end Dj2 of the peripheral wall portion 218 in the tool radial direction Dr. The peripheral wall portion 218 is rectangular when viewed from the tool radial direction Dr. As shown in Figures 4 and 8, such a component housing portion 215 has a housing recess 216 that is recessed from the outer surface 211f of the holder body 211 facing the second side Dr2 in the tool radial direction Dr, toward the first side Dr1 (inward of the holder body 211) in the tool radial direction Dr. The housing recess 216 opens toward the second side Dr2 (outward of the holder body 211) in the tool radial direction Dr. As shown in Figures 3 and 4, the component housing section 215 further includes a cover 217 that detachably closes the opening of the housing recess 216. The cover 217 is fixed by bolts 92 in close contact with the tip of the peripheral wall section 218 via a packing (not shown).

[0063] Electrical components 220 electrically connected to the turning tool 1 are housed in the housing recess 216 of the component housing section 215. Examples of electrical components 220 include the first distance sensor 31, the second distance sensor 32, the camera 51, the control unit for controlling each light source, and the battery for supplying power to the control unit. The control unit includes a wireless communication module 228 that transmits detection signals from the first distance sensor 31 and the second distance sensor 32 to the outside. Here, the electrical component 220 may have an information display unit 225 capable of displaying information. The information display unit 225 displays information related to the first distance sensor 31, the second distance sensor 32, the camera 51, the operating status of each light source, the battery level, etc. Examples of the information display unit 225 include lamps such as LEDs, and liquid crystal panels.

[0064] At least a portion of the peripheral wall portion 218 of the component housing portion 215 is formed of a material that allows radio waves from the wireless communication module 228 to pass through. In this embodiment, a glass window 218w that allows radio waves to pass through is provided in a portion of the peripheral wall portion 218. Furthermore, at least a portion of the cover 217 is formed of a material that allows the information display section 225 of the electrical component 220 housed in the housing recess 216 to be visible from outside the component housing section 215. In this embodiment, for example, a light-transmitting glass window 217w is provided in a portion of the cover 217.

[0065] As shown in Figures 8 and 9, the turret engagement portion 214 protrudes from the bottom plate portion 219 of the component housing portion 215 to one side in the tool radial direction Dr and is formed in a shape that can engage with the tool holding groove 303.

[0066] As shown in Figures 1 and 4, the tool connection portion 212 is provided at one end of the axial direction Dj1 in the tool holder block 210. The tool connection portion 212 is provided on one end of the axial direction Dj1 in relation to the holder body 211 and the turret 301. The tool connection portion 212 extends along a plane intersecting the axial direction Dj. The tool connection portion 212 is formed in a rectangular plate shape when viewed from the axial direction Dj. The tool connection portion 212 expands in diameter in the tool radial direction Dr relative to the holder body 211. A typical tool connection portion extends only outward in the turret radial direction Drrt. In contrast, as shown in Figures 4 and 9, in this embodiment, the tool connection portion 212 also extends inward in the turret radial direction Drrt (first side Dr1 in the tool radial direction Dr) relative to the outer peripheral edge 301e of the turret 301. As shown in Figures 2 to 4, the tool connection portion 212 has a size that overlaps with the flange 24 when viewed from the axial direction Dj. As shown in Figures 4 and 8, the tool connection portion 212 has an insertion hole 212h in its central part into which a cylindrical portion 24c is inserted and which communicates with the housing recess 216.

[0067] As shown in Figures 8 and 9, the turret connection portion 213 protrudes from the component housing portion 215 on both sides in the width direction Dw. Each of the pair of turret connection portions 213 is provided along the outer circumferential surface of the turret 301. As shown in Figure 9, the thickness T1 of the turret connection portion 213 in the turret radial direction Drt is smaller than the thickness T2 of the component housing portion 215 in the turret radial direction Drt. Such a turning tool unit 200 is mounted on the turret 301 with the first side Dr1 in the tool radial direction Dr facing inward in the turret radial direction Drrt. The turret connection portion 213 is fastened and fixed to the outer surface of the turret 301 by multiple bolts (not shown).

[0068] The pair of turret connection sections 213 overlap with the tool connection section 212 when viewed from the axial direction Dj. As a result, as shown in Figure 8, the thickness of the side walls 218s on both sides in the width direction Dw (circumferential direction) of the peripheral wall section 218 of the component housing section 215 can be reduced. Reducing the thickness of the side walls 218s improves the radio wave transmission of the window 218w, and allows for miniaturization and weight reduction of the tool holder block 210.

[0069] [Effects of this embodiment] According to the turning tool unit 200 of this embodiment described above, the turning tool 1 is mounted on the turret 301 via the tool holder block 210. Since the turning tool 1 is equipped with a flange 24 that expands in diameter on the outside in the tool radial direction Dr, the area of ​​the connection portion to the tool holder block 210 can be increased, and the turning tool 1 can be firmly connected to the tool holder block 210. As a result, it is possible to increase rigidity while suppressing an increase in the size of the tool.

[0070] In this embodiment, the tool holder block 210 has a tool connection portion 212 that expands in diameter outward in the tool radial direction Dr relative to the holder body 211, to which the flange 24 is connected. Therefore, the area of ​​the connection portion with the turning tool 1 can be increased on the tool holder block 210 side as well, and the turning tool 1 can be firmly connected to the tool holder block 210.

[0071] Furthermore, in this embodiment, since the tool connection portion 212 extends inward in the radial direction Drt of the turret relative to the outer peripheral edge 301e of the turret 301, it is possible to increase the area of ​​the tool connection portion 212 to which the flange 24 of the turning tool 1 is connected, while suppressing the tool connection portion 212 from spreading outward in the radial direction Drt of the turret. In addition, since the tool connection portion 212 extends inward in the radial direction Drt of the turret, it can come into contact with the axially oriented side surface of the turret 301. As a result, the tool connection portion 212 can receive the moment applied to the connection portion between the tool holder block 210 and the turret 301 due to the cutting resistance applied to the cutting edge 42, thereby increasing the rigidity of the tool holder block 210.

[0072] Furthermore, in this embodiment, since the holder body 211 is equipped with a component housing section 215, electrical components 220 electrically connected to the turning tool 1 can be housed in the component housing section 215, making the turning tool unit 200 a compact configuration. Conventional turning tools are fixed to a tool holder block by a shank inserted into the tool holder block. The tool holder block is provided with a holding hole through which the shank passes, making it difficult to provide space for housing electrical components. In contrast, the turning tool 1 of this embodiment is connected to the tool holder block 210 at the flange 24, making it easier to secure space to form the component housing section 215 in the tool holder block.

[0073] Furthermore, in this embodiment, at least a portion of the cover 217 of the component housing section 215 is formed of a material that allows the information display section 225 of the electrical component 220 housed in the housing recess 216 to be visible from the outside of the component housing section 215. Therefore, the information displayed on the information display section 225 can be viewed while the turning tool unit 200 is mounted on the turret 301.

[0074] Furthermore, in this embodiment, at least a portion of the component housing section 215 is made of a material that allows radio waves from the wireless communication module 228 to pass through, so that detection signals from distance sensors 31 and 32 can be transmitted well from the wireless communication module 228 housed in the component housing section 215 to the outside of the turning tool unit 200.

[0075] Furthermore, in this embodiment, since the thickness T1 of the turret radial Drt of the pair of turret connection parts 213 is smaller than the thickness T2 of the turret radial Drt of the parts housing part 215, the bolts for connecting the tool holder block 210 to the turret 301 can be shortened, and the turning tool unit 200 can be firmly connected to the turret 301.

[0076] Furthermore, in this embodiment, the portion 24b of the outer edge of the flange 24 that faces outward in the turret radial direction Drt is cut out in a straight line, thereby suppressing the outward enlargement of the flange 24 in the turret radial direction Drt.

[0077] [Other components included in the present invention] It should be noted that the present invention is not limited to the embodiments described above, and modifications to the configuration, etc., are possible without departing from the spirit of the invention, as described below, for example.

[0078] For example, in the above-described embodiment, the turning tool 1 is configured to include a flange 24, but a configuration in which the flange 24 is omitted is also possible.

[0079] Furthermore, without departing from the spirit of the present invention, the configurations (components) described in the above embodiments, modifications, and provisos may be combined, and additions, omissions, substitutions, and other modifications of the configurations are permitted. Moreover, the present invention is not limited by the above embodiments, but is limited only by the claims. [Explanation of Symbols]

[0080] 1… Turning tools 2…Tool body 4…Cutting insert (machined part) 23d... Pedestal 24…Flange 31...First distance sensor (sensor) 32...Second distance sensor (sensor) 42…Cutting edge 100…Work material 100f…processed surface 200... Turning tool unit 210...Tool holder block 211...Holder body 212...Tool connection part 213... Turret connection point 214... Turret engagement part 215... Component housing 216…Receiving recess 217...cover 220… Electrical components 225...Information display section 228... Wireless communication module 300…Machine tools 301... Turret 301e...outer edge 303...Tool holding groove J…Tool axis Dj…Axis direction Dr…Tool radial direction Drt... Turret radial direction

Claims

1. Turning tools and It comprises a tool holder block that is detachable from the turret of a machine tool and holds the turning tool, The aforementioned turning tool is The tool body extends along the tool axis, A cutting section having a cutting edge is provided at one end of the tool body in the axial direction, The tool body is provided with a sensor that measures the machined surface of the workpiece that has been machined by the cutting section, A flange is provided at the other base end of the tool body in the axial direction. The flange expands in diameter outward in the tool radial direction intersecting the axial direction and is connected to the tool holder block. Turning tool unit.

2. The tool holder block is, A holder body having a turret connection portion connected to the outer circumferential surface of the turret, The holder body and the tool connection portion are provided on one side in the axial direction relative to the turret, and the tool connection portion expands outward in the radial direction of the tool relative to the holder body, to which the flange is connected. The turning tool unit according to claim 1.

3. The tool connection portion extends inward in the radial direction of the turret, with respect to the outer edge of the turret and the central axis of the turret. The turning tool unit according to claim 2.

4. The holder body is equipped with a component housing capable of housing electrical components electrically connected to the turning tool. The turning tool unit according to claim 3.

5. The aforementioned electrical component has an information display unit capable of displaying information, The aforementioned component housing section is The holder body has an opening that faces outward, and a housing recess in which the electrical components are housed, The system includes a cover that detachably closes the opening of the aforementioned receiving recess, The cover, at least a portion thereof, is formed of a material that allows the information display portion of the electrical component housed in the housing recess to be visible from the outside of the component housing portion. The turning tool unit according to claim 4.

6. The aforementioned electrical component includes a wireless communication module that transmits detection signals from the sensor, At least a portion of the component housing is formed of a material that allows radio waves from the wireless communication module to pass through. The turning tool unit according to claim 4.

7. The holder body is provided with a pair of turret connection portions that protrude from the component housing portion to both sides of the turret in the circumferential direction, The thickness of the turret connection portion in the turret radial direction is smaller than the thickness of the component housing portion in the turret radial direction. The turning tool unit according to claim 4.

8. The flange is formed in a disc shape when viewed from the axial direction, Of the outer peripheral edge of the flange, the portion facing outward in the radial direction of the turret, centered on the central axis of the turret, is notched so as to extend linearly in a direction intersecting the radial direction of the turret. The turning tool unit according to claim 1 or 2.

9. A turning tool comprising a tool body extending along the tool axis, a cutting section having a cutting edge provided at one end of the tool body in the axial direction, and a sensor provided on the tool body for measuring the machined surface of the workpiece machined by the cutting section, It comprises a tool holder block that is detachable from the turret of a machine tool and holds the turning tool, The tool holder block is, A holder body having a turret connection portion connected to the outer circumferential surface of the turret, The holder body and the turret are provided on one side in the axial direction, and the tool connection portion is provided on one side in the axial direction, widens outward in the tool radial direction intersecting the axial direction with respect to the holder body, and the turning tool is connected to it. Turning tool unit.

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