JP7806592B2 - Turning tool units, machine tools - Google Patents

Description

The present invention relates to a turning tool unit and a machine tool.

Machine tools such as lathes and machining centers are sometimes equipped with electronic components such as sensors to check the condition of the cutting tool's cutting edge. Patent Document 1 discloses a configuration including a strain sensor that detects the cutting force exerted by the cutting edge of the cutting tool, a signal line (connection line) that transmits the signal detected by the strain sensor, and a connection terminal to which one end of the signal line is connected. When such a cutting tool is attached to the machine tool, the connection terminal is electrically connected to a terminal on the machine tool, and the signal detected by the sensor is output to the machine tool.

Chinese Patent No. 103707131

However, if signal lines and connection terminals are provided on the tool itself, there is a risk that the signal lines and connection terminals may be damaged when attaching or detaching the cutting tool to the machine tool. Furthermore, poor contact in the connection terminals can also cause problems with signal transmission.

In view of the above circumstances, one of the objects of the present invention is to provide a turning tool unit and machine tool that allows stable use of electronic components installed in the tool body.

One embodiment of the turning tool unit of the present invention comprises a turning tool and a holder that holds the turning tool and is attached to a machine tool. The turning tool comprises a tool body that extends along a tool axis and has a pedestal at one end in the axial direction along the tool axis, a cutting insert that is detachably attached to the pedestal, and tool-side electronic components provided on the tool body. The holder comprises a holder body having a tool holding portion that holds the tool body, holder-side electronic components that are electrically connected to the tool-side electronic components and include a communication module capable of communicating with the outside, and a box-shaped casing that is held by the holder body and contains the holder-side electronic components.

According to one aspect of the turning tool unit of the present invention, the holder that holds the turning tool has a box-shaped casing that houses holder-side electronic components. The holder-side electronic components include a communication module that is electrically connected to the tool-side electronic components provided on the turning tool. This allows the tool-side electronic components to exchange electrical signals with the outside via the communication module provided in the holder's casing. This eliminates the need for connection terminals or wiring for electrical connection with the machine tool, and these will not be damaged when attaching or detaching the turning tool. This allows for stable use of the tool-side electronic components provided on the tool body.

In the above-mentioned turning tool unit, the holder-side electronic components may further include a control module that controls the operation of the tool-side electronic components.

In this case, the holder-side electronic components are equipped with a control module, allowing them to control the operation of the tool-side electronic components. Furthermore, by receiving control signals from the outside via the communication module, the tool-side electronic components equipped on the turning tool can be controlled from the outside.

In the above-mentioned turning tool unit, the holder-side electronic components may further include a battery that supplies power to the tool-side electronic components.

In this case, by equipping the holder-side electronic components with a battery, power can be supplied to the tool-side electronic components without receiving power from an external source. Therefore, there is no need for power wiring to receive power from an external source.

In the above-mentioned turning tool unit, the tool body may further include a wiring insertion portion extending in the axial direction, one end of which is connected to the tool-side electronic component and the other end of which is connected to the holder-side electronic component, through which a connection wiring is inserted; and a wiring accommodating groove formed at the other end in the axial direction, recessed toward one side in the axial direction, extending radially outward from the wiring insertion portion in a direction intersecting the axial direction, and accommodating the connection wiring.

In this case, the connection wiring, one end of which is connected to the tool-side electronic components, is connected to the holder-side electronic components inside the casing through an axial insertion portion extending in the axial direction. The other axial end of the tool body is provided with a wiring accommodating groove that extends radially outward from the wiring insertion portion. Because the wiring accommodating groove is recessed toward one axial side, accommodating the connection wiring in the wiring accommodating groove can prevent damage to the connection wiring when, for example, attaching or detaching the turning tool unit to or from the machine tool.

In the above-mentioned turning tool unit, the tool-side electronic components may include at least one of a camera that photographs the machined surface of the workpiece machined by the cutting insert, a lighting device that illuminates the machined surface, and a distance sensor that detects the distance to the machined surface.

In this case, the tool-side electronic components include at least one of a camera, a distance sensor, and a distance sensor. This allows signals output from these tool-side electronic components to be output to the outside via the communication module, and the operation of these tool-side electronic components to be controlled from the outside, all wirelessly.

One embodiment of the machine tool of the present invention comprises a turning tool unit as described above, and a machine tool body to which the turning tool unit is attached and which performs cutting on a workpiece using the cutting insert.

According to one aspect of the machine tool of the present invention, by mounting the above-described turning tool unit on the machine tool body, it is possible to provide a machine tool that allows stable use of the tool-side electronic components provided on the tool body.

The turning tool unit and machine tool of one aspect of the present invention allows for stable use of electronic components provided in the tool body.

FIG. 1 is a perspective view of a turning tool unit according to an embodiment of the present invention. 1 is a perspective view of a turning tool according to an embodiment of the present invention; FIG. 1 is a plan view of a turning tool according to an embodiment of the present invention. 1 is a perspective view of a head portion of a turning tool according to an embodiment of the present invention. FIG. FIG. 2 is a cross-sectional view of a head portion of one embodiment of the present invention. FIG. 5 is a perspective view of the head portion of the embodiment of the present invention, seen from a direction different from that of FIG. 4 . 1 is a cross-sectional view showing a camera cover according to an embodiment of the present invention. FIG. 2 is a view of the camera cover of the embodiment of the present invention as viewed from the axial direction. 1 is a cross-sectional view of a turning tool according to an embodiment of the present invention. FIG. 2 is a block diagram showing the functional configuration of a turning tool unit according to an embodiment of the present invention. FIG. 10 is a perspective view showing the configuration of a modified example of the turning tool unit according to one embodiment of the present invention.

The following describes a turning tool unit and machine tool according to an embodiment of the present invention, with reference to the drawings. In the drawings, the scale and number of components may differ from the actual structure to make each component easier to understand.

<Turning tool unit, machine tool>
FIG. 1 is a perspective view of a turning tool unit 70A according to one embodiment of the present invention.
As shown in FIG. 1 , a turning tool unit 70A of this embodiment includes a turning tool 1 and a holder 80 that holds the turning tool 1. The holder 80 is attached to a machine tool body 201 of a machine tool 200. In this embodiment, the machine tool body 201 includes a cylindrical turret 202. The turret 202 is rotatable about its central axis. A plurality of holders 80 are attached to the outer periphery of the turret 202 at intervals in the circumferential direction. By rotating the turret 202, the machine tool 200 appropriately selects one of the turning tools 1 held by the plurality of holders 80 and moves it to a position facing the workpiece 100, thereby cutting the workpiece 100.
<Turning tools>
Fig. 2 is a perspective view of the turning tool 1 according to the embodiment. Fig. 3 is a plan view of the turning tool 1. Fig. 4 is a perspective view of the head portion 22 of the turning tool 1.

The turning tool 1 of this embodiment performs turning operations such as boring on a workpiece 100, such as a metal material, which is rotated around a spindle. The base end of the turning tool 1 is detachably held in a jig (tool rest) (not shown). The jig that holds the turning tool 1 is fixed to a machine tool (lathe) such as a lathe (not shown).

As shown in Figures 2 to 4, the turning tool 1 of this embodiment includes a tool body 2, a cutting insert 4, a sensor device 3, an imaging device 5, and an illumination device 6.

The tool body 2 extends in the axial direction Dj along the tool axis J. The tool body 2 has a cylindrical shank portion 21 centered on the tool axis J, and a head portion 22 provided on one side Dj1 of the shank portion 21 in the axial direction Dj of the tool body 2.

The head portion 22 has a protrusion 23 that protrudes from the outer peripheral surface of the shank portion 21 outward in the radial direction Dr of the tool body 2, which intersects with the axial direction Dj. A base 23d is provided on the protrusion 23. An insert attachment 41 is attached to the base 23d. The insert attachment 41 holds the cutting insert 4. The base 23d and the cutting insert 4 attached to the base 23d are positioned on the first side Dr1 of the tool body 2 in the radial direction Dr relative to the tool axis J.

The cutting insert 4 has a diamond shape when viewed in the thickness direction. The cutting insert 4 has a pair of diamond-shaped main surfaces in a plan view facing the thickness direction, and side surfaces connecting the pair of main surfaces. A cutting edge 42 is provided on the ridge between the main surfaces and the side surfaces 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 in the radial direction Dr of the tool body 2. Therefore, a portion of the cutting edge 42 is located at the forefront of one side Dj1 in the axial direction Dj of the tool body 2, and at the outermost end in the radial direction Dr.

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

FIG. 5 is a cross-sectional view of the head portion 22.
4 and 5 , the sensor device 3, the imaging device 5, and the lighting device 6 are provided in the head portion 22. The sensor device 3, the imaging device 5, and the lighting device 6 are arranged on the second side Dr2 in the radial direction Dr with respect to the tool axis J in the tool body 2. In other words, the sensor device 3, the imaging device 5, and the lighting device 6 are arranged 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 radial direction Dr of the tool body 2.

The sensor device 3 includes a sensor bracket 30, a first distance sensor (distance sensor, tool-side electronic component) 31, and a second distance sensor (distance sensor, tool-side electronic component) 32. The sensor bracket 30 is attached to the tool body 2. The first distance sensor 31 and the second distance sensor 32 are attached to the sensor bracket 30.

As shown in FIG. 5 , a sensor support portion 24 is provided on one side Dj1 of the head portion 22 in the axial direction Dj. The sensor support portion 24 is formed at a position a predetermined distance from the tip 22s on the one side Dj1 of the head portion 22 in the axial direction Dj toward the other side Dj2 in the axial direction Dj. A positioning surface 22t, which is a flat surface facing the second side Dr2 in the radial direction Dr, is formed between the tip 22s and the sensor support portion 24. The sensor support portion 24 protrudes from the positioning surface 22t outward in the radial direction Dr (second side Dr2). The sensor support portion 24 has a sensor support surface 24f that supports the sensor device 3 and a second surface 22b that abuts against the camera cover 53 (described below). The sensor support surface 24f is a flat surface facing the one side Dj1 in the axial direction Dj. The second surface 22b is a flat surface facing the other side Dj2 in the axial direction Dj.

As shown in FIG. 4, the sensor bracket 30 is fastened to the sensor support surface 24f with multiple fixing screws 37. The sensor bracket 30 is plate-shaped. The sensor bracket 30 holds a first distance sensor 31 and a second distance sensor 32. The first distance sensor 31 is positioned facing outward in the radial direction Dr. The measurement direction of the first distance sensor 31 is the outward direction of the radial direction Dr. The second distance sensor 32 is positioned facing one side Dj1 in the axial direction Dj. The second distance sensor 32 measures the distance to a measurement object positioned on the tip side of the tool body 2. In other words, the measurement direction of the second distance sensor 32 is one side Dj1 in the axial direction Dj.

Fig. 6 is a perspective view of the head unit 22 seen from a different direction than that of Fig. 4. Fig. 6 shows the head unit 22 with the camera cover 53 and the cover member 62 removed.
As shown in Fig. 5, the first distance sensor 31 has a sensor cable 34. The sensor cable 34 of the first distance sensor 31 is led out from the first distance sensor 31 inward in the radial direction Dr. The sensor cable 34 is housed in an accommodation hole (wire insertion portion) 27 formed in the tool body 2 and extending in the axial direction Dj. As shown in Fig. 6, the sensor cable 35 of the second distance sensor 32 is led out from the second distance sensor 32 to the other side Dj2 in the axial direction Dj. An insertion hole 24h opening to the second surface 22b is formed in the sensor support portion 24. The sensor cable 35 of the second distance sensor 32 extends from the sensor support portion 24 to the other side Dj2 in the axial direction Dj through the insertion hole 24h.

The first distance sensor 31 and the second distance sensor 32 measure the distance to the machined surface 100f machined using the cutting insert 4. The first distance sensor 31 measures the distance to the machined surface 100f facing inward in the radial direction Dr, machined using the cutting insert 4. The second distance sensor 32 measures the distance to the machined surface 100f facing the other side Dj2 in the axial direction Dj, machined using the cutting insert 4. In this embodiment, eddy current sensors are used as the first distance sensor 31 and the second distance sensor 32. Eddy current sensors can perform accurate measurements even when wet machining is performed. Eddy current sensors also tend to maintain stable measurement accuracy against disturbances such as those in the surrounding environment. Therefore, eddy current sensors are more suitable for distance measurement in disturbance-prone environments after cutting, regardless of whether wet machining or dry machining is selected, compared to optical distance sensors, for example.

The first distance sensor 31 and the second distance sensor 32 are used to measure the machined surface 100f after the turning tool 1 forms it. Because the first distance sensor 31 and the second distance sensor 32 are provided on the tool body 2, the machined surface 100f can be measured after cutting without having to temporarily separate the turning tool 1 from the workpiece 100. This shortens the time required to measure the machined surface 100f during turning. Furthermore, the first distance sensor 31 can be used to measure the distance to the machined surface 100f facing inward in the radial direction Dr, 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, machined by the cutting insert 4. In other words, dimensional measurements of surfaces facing in different directions can be performed without changing the orientation of the workpiece 100, further shortening 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 can measure the axial position of the step and hole bottom of the cutting insert.

As shown in Figures 4 and 5, the imaging device 5 is provided on the head portion 22 of the tool body 2. The imaging device 5 is disposed on the other side Dj2 in the axial direction Dj relative to the sensor device 3, across the tool axis J. The imaging device 5 is disposed between the base 23d and the lighting device 6 in the axial direction Dj. As shown in Figure 5, the imaging device 5 includes a camera (tool-side electronic component) 51, a camera cover 53, and a camera seal member 57.

The camera 51 is, for example, a waterproof CMOS image sensor or CCD image sensor. As shown in FIGS. 5 and 6 , the camera 51 is housed in a housing recess 25 formed in the head portion 22 of the tool body 2. The housing recess 25 is formed on the first surface 22a facing outward in the radial direction Dr (second side Dr2) of the tool body 2. The second surface 22b is formed to rise outward in the radial direction Dr from the end of one side Dj1 of the first surface 22a in the axial direction Dj. The housing recess 25 is recessed inward in the radial direction Dr from the first surface 22a. As shown in FIG. 6 , the sensor cable 35 of the second distance sensor 32, which extends from the sensor support portion 24 to the other side Dj2 in the axial direction Dj, is guided through the housing recess 25 to a housing hole 27 (see FIG. 5 ) formed inside the head portion 22 and shank portion 21.

The camera 51 has a lens portion 51p that faces the object to be photographed. The lens portion 51p has a lens (not shown) built into the camera and a lens protection cover 51c that covers the lens and is exposed inside the camera opening 54, which will be described later. The camera 51 is positioned so that the lens protection cover 51c of the lens portion 51p faces outward in the radial direction Dr. The camera 51 is positioned so that it can photograph the outside of the tool body 2 in the radial direction Dr. As shown in FIG. 3, the camera 51 photographs the machined surface 100f, or so-called inner diameter surface, of the workpiece 100 that has been machined with the cutting insert 4, which faces inward in the radial direction Dr.

As shown in FIG. 5, the camera 51 is positioned on the other side Dj2 in the axial direction Dj of the cutting insert 4 attached to the base 23d. However, it is preferable to position the camera 51 as close as possible in the axial direction Dj to the machining position of the machined surface 100f by the cutting insert 4. This allows the state of the machined surface 100f after machining to be photographed from a closer position. Also, for example, if the sensor device 3 is positioned in a different position from the above, the camera 51 may be positioned at 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 cutting by the cutting insert 4.

The camera 51 has a camera cable 52. The camera cable 52 is housed in a housing hole 27 formed inside the head portion 22 and shank portion 21, along with the sensor cables 34 and 35.

FIG. 7 is a cross-sectional view showing the camera cover 53.
The camera cover 53 is attached to the head portion 22 of the tool body 2. The camera cover 53 covers the accommodating recess 25 and the camera 51. As shown in FIGS. 5 and 7 , the camera cover 53 has a first opposing surface 53a facing inward in the radial direction Dr and opposing the first surface 22a, and a second opposing surface 53b facing one side Dj1 in the axial direction Dj and opposing the second surface 22b. The camera cover 53 covers the camera 51 and the accommodating recess 25 by arranging the first opposing surface 53a facing the outer periphery of the accommodating recess 25 in which the camera 51 is accommodated. The second opposing surface 53b of the camera cover 53 faces the second surface 22b of the sensor support portion 24.

As shown in Figures 5 to 7, a seal member 55 is sandwiched between the camera cover 53 and the head portion 22 of the tool body 2. The seal member 55 is continuous and annular as a whole. The seal member 55 has a first seal portion 55a and a second seal portion 55b. The first seal portion 55a extends along the first surface 22a and is sandwiched between the first surface 22a and the first opposing surface 53a. When viewed from the outside in the radial direction Dr, the first seal portion 55a is bent in a U-shape. The first seal portion 55a extends along three sides of the outer periphery of the accommodating recess 25, excluding one side Dj1 on one side in the axial direction Dj.

The second seal portion 55b is continuous with the first seal portion 55a. The second seal portion 55b rises outward in the radial direction Dr from the end of the first seal portion 55a on one side Dj1 in the axial direction Dj. The second seal portion 55b extends along the second surface 22b and is sandwiched between the second surface 22b and the second opposing surface 53b. When viewed from the axial direction Dj, the second seal portion 55b is bent in a U-shape. The second seal portion 55b extends along the remaining three sides of the second surface 22b in the radial direction Dr, excluding one inner side.

FIG. 8 is a view of the camera cover 53 as seen from the axial direction Dj.
8, the camera cover 53 has a cable housing portion 53d that houses the sensor cable 35 extending from the insertion hole 24h to the other side Dj2 in the axial direction Dj. The cable housing portion 53d is recessed outward in the radial direction Dr from the first opposing surface 53a. A cable introduction opening 53k that communicates with an end of the cable housing portion 53d on one side Dj1 in the axial direction Dj is formed in the second opposing surface 53b at a position facing the insertion hole 24h in the axial direction Dj. The second seal portion 55b is arranged to surround the insertion hole 24h and the cable introduction opening 53k.

As shown in FIG. 4, the camera cover 53 is fixed to the tool body 2 by, for example, two bolts 59. As shown in FIGS. 5 and 6, threaded holes 22n into which the bolts 59 are threaded are formed at predetermined positions on the first surface 22a of the head portion 22. As shown in FIG. 5, each bolt 59 integrally includes a threaded shank 59a and a screw head 59b. The threaded shank 59a is threaded into the threaded hole 22n through a bolt insertion hole 53h formed in the camera cover 53. The screw head 59b is formed at one end of the threaded shank 59a. The screw head 59b is formed with a larger diameter than the screw shank 59a. The bearing surface 59z of the screw head 59b is tapered so that the diameter gradually increases in the direction in which the screw shank 59a extends.

As shown in Figures 5 and 7, the bolt insertion hole 53h formed in the camera cover 53 has a tapered inclined surface 53s such that the hole diameter gradually increases from the inside to the outside in the radial direction Dr. When the threaded shank 59a of the bolt 59 is threaded through the bolt insertion hole 53h and into the screw hole 22n, the seating surface 59z of the screw head 59b abuts against the inclined surface 53s. When the bolt 59 is tightened with a predetermined torque, the seating surface 59z abuts against the inclined surface 53s, fixing the camera cover 53 in place.

When tightening the bolt 59, the first opposing surface 53a of the camera cover 53 is first placed on the first seal portion 55a of the seal member 55, which is aligned with the first surface 22a, and the second opposing surface 53b is aligned with the second seal portion 55b, which is aligned with the second surface 22b. In this state, the second opposing surface 53b and the second surface 22b are separated in the axial direction Dj by the thickness of the second seal portion 55b. When the bolt 59 is tightened, the seating surface 59z presses the inclined surface 53s inward in the radial direction Dr, bringing the first opposing surface 53a and the first surface 22a into close contact and crushing the first seal portion 55a. Furthermore, when the bolt 59 is fully tightened and the seating surface 59z abuts the inclined surface 53s, the second opposing surface 53b and the second surface 22b of the camera cover 53 are brought into close contact and crushing the second seal portion 55b. In other words, as the bolt 59 is tightened, the seat surface 59z comes into contact with the inclined surface 53s, displacing the camera cover 53 to one side Dj1 in the axial direction Dj, pressing the second opposing surface 53b toward the second surface 22b and crushing the second seal portion 55b. In this way, simply by tightening the bolt 59 in the radial direction Dr, the camera cover 53 can be attached to the tool body 2 by pressing it against both the first surface 22a and the second surface 22b. This improves the sealing performance of the seal member 55 between the camera cover 53 and the tool body 2.

The camera cover 53 has a camera opening 54 at a position opposite the lens portion 51p of the camera 51. The camera opening 54 penetrates in a direction connecting the first opposing surface 53a facing the storage recess 25 and the cover outer surface 53f, which faces the opposite side of the camera cover 53 from the first opposing surface 53a (outside in the radial direction Dr). The lens portion 51p is positioned inside the camera opening 54 and takes pictures through the camera opening 54.

As shown in FIG. 7 , the camera opening 54 has an opening inclined surface 54s formed in a tapered shape such that the diameter of the camera opening 54 gradually increases from the accommodating recess 25 side on the inside in the radial direction Dr toward the cover outer peripheral surface 53f side on the outside in the radial direction Dr. In this embodiment, the opening inclined surface 54s is formed continuously around the entire circumferential direction of the camera opening 54. Note that the opening inclined surface 54s only needs to be formed on at least a portion of the periphery of the camera opening 54. When the turning tool 1 is in use, at least the opening inclined surface 54s needs to be formed in a position that is on the lower side of the camera opening 54. This makes it easier for liquid coolant (cutting oil) supplied around the cutting insert 4 to enter the camera opening 54 during cutting, as the coolant will easily flow out of the camera opening 54.

As shown in FIG. 5, the camera seal member 57 is sandwiched between the lens portion 51p of the camera 51 and the outer periphery of the camera opening 54. The camera seal member 57 is annular and consists of a so-called O-ring. The camera seal member 57 is made of an elastic material such as a rubber-based material. By sandwiching the camera seal member 57 between the lens portion 51p and the camera cover 53, the infiltration of coolant from the camera opening 54 into the camera cover 53 is prevented.

As shown in Figure 7, the camera cover 53 has a cover-side recess 53c that accommodates the camera seal member 57. By accommodating the camera seal member 57 in the cover-side recess 53c, misalignment of the camera seal member 57 and the camera 51 is reduced.

As shown in FIG. 3, the lighting device 6 is provided on the tool body 2 and illuminates the machining surface 100f photographed by the camera 51. As shown in FIGS. 4 and 5, the lighting device 6 is disposed on the other side Dj2 in the axial direction Dj relative to the camera 51 of the imaging device 5. As a result, the camera 51 of the imaging device 5 is disposed between the distance sensors 31, 32 of the sensor device 3 and the lighting device 6 in the axial direction Dj. The lighting device 6 includes a light source (tool-side electronic component) 61 and a cover member 62.

The light source 61 is a light-emitting element such as an LED. As shown in FIG. 6 , the light source 61 is disposed on the third surface 22c of the head portion 22, which faces outward in the radial direction Dr. The third surface 22c may be continuous with the first surface 22a, but in this embodiment, the third surface 22c is formed in a stepped manner relative to the first surface 22a in the radial direction Dr.

As shown in FIG. 4 , the cover member 62 is fixed to the third surface 22c of the tool body 2 by a bolt 28. The cover member 62 covers at least a portion of the light source 61. The cover member 62 secures the light source 61 by sandwiching the light source 61 between itself and the head portion 22.

The cover member 62 has an opening 63 through which illumination light from the light source 61 passes. The opening 63 penetrates the cover member 62 in a direction connecting the cover back surface 62b facing the light source 61 and the cover front surface 62f facing away from the light source 61. In this embodiment, the opening 63 is a slit 63s. The slit 63s is formed to extend along the axial direction Dj. The opening 63 may be a hole instead of a slit 63s. The slit 63s is formed so that its position in the circumferential direction around the tool axis J coincides with the camera 51. When viewed from the axial direction Dj, the slit 63s is formed in a tapered shape such that the opening dimensions gradually increase from the cover back surface 62b side toward the cover front surface 62f side.

The illumination light from the light source 61 is irradiated onto the processing surface 100f on the outside in the radial direction Dr through the opening 63. By forming the slit 63s in a tapered shape when viewed from the axial direction Dj,
The illumination light passing through the slits 63s is diffused radially, so that the illumination light is irradiated over a wider range of the processing surface 100f.

The cover member 62 also has a camera-side opening 64 at its end on one side Dj1 in the axial direction Dj. The camera-side opening 64 opens toward the one side Dj1 in the axial direction Dj. The camera-side opening 64 is formed to allow a portion of the illumination light from the light source 61 to pass through. As a result, a portion of the illumination light from the light source 61 passes through the camera-side opening 64 and is irradiated toward the camera 51 on the one side Dj1 in the axial direction Dj.
4 and 5 , the camera cover 53 is adjacent to one side Dj1 in the axial direction Dj of the cover member 62. The camera cover 53 has an outer peripheral inclined surface 53g that inclines outward in the radial direction Dr from the lighting device 6 side toward the lens portion 51p side (camera opening 54 side) of the camera 51 in the axial direction Dj. This makes it possible to prevent the illumination light from the lighting device 6 from being blocked by the camera cover 53.

As shown in FIG. 9, the turning tool 1 includes, as tool-side electronic components P provided in the tool body 2, distance sensors 31 and 32 of the sensor device 3, a camera 51 of the imaging device 5, and a light source 61 of the lighting device 6.
The sensor cables 34, 35, one end of which is connected to the distance sensors 31, 32, the camera cable 52, one end of which is connected to the camera 51, and the light source cable 67, one end of which is connected to the light source 61, are inserted through the accommodating hole 27 as connection wiring D. The connection wiring D is led out of the accommodating hole 27 from an end on the other side Dj2 in the axial direction Dj of the tool body 2. A wire accommodating groove 29 is formed at the end on the other side Dj2 in the axial direction Dj of the tool body 2, extending from the accommodating hole 27 outward in the radial direction Dr. The wire accommodating groove 29 is recessed from the end on the other side Dj2 in the axial direction Dj of the tool body 2 to one side Dj1 in the axial direction Dj. The connection wiring D extends outward in the radial direction Dr from the accommodating hole 27 through the wire accommodating groove 29 and is electrically connected to a holder-side electronic component 85 in a module 82, which will be described later.

<Holder>
1, the shank portion 21 of the turning tool 1 is held by a holder body 81 of a holder 80. The holder 80 includes the holder body 81 and a module 82.
The holder body 81 integrally includes a tool holding portion 81 a and a base portion 81 b. The tool holding portion 81 a is a hole extending in the axial direction Dj, and the shank portion 21 is inserted through the hole. The base portion 81 b is fastened and fixed to the machine tool body 201 by a bolt (not shown).

The module 82 includes a box-shaped casing 84 and holder-side electronic components 85 (see FIG. 9) housed within the casing 84. As shown in FIGS. 1 and 10, the casing 84 is fixed integrally to the holder main body 81. In this embodiment, the casing 84 is disposed on the other side Dj2 of the holder main body 81 in the axial direction Dj. This prevents coolant from splashing onto the casing 84 even if it splashes from the cutting insert 4 side. The casing 84 may have a connection port 84j on its outer circumferential surface to which the connection wiring D is connected. In this case, the tip of the connection wiring D may be provided with a coupler 99 that is detachably connected to the connection port 84j.

The holder-side electronic components 85 are electrically connected to the tool-side electronic components P via connection wiring D. In this embodiment, the holder-side electronic components 85 include, for example, a battery 87, a communication module 88, and a control module 89. The holder-side electronic components 85 may include only some of the components shown here, or may include components other than those shown here.

The battery 87 supplies power to operate the distance sensors 31, 32, camera 51, and light source 61 via connecting wiring D. The communication module 88 is capable of wireless communication with the outside world. The communication module 88 is capable of wireless communication with a control device provided on the machine tool main body 201, for example, via a wireless communication network such as wireless LAN, Wi-Fi (registered trademark), or Bluetooth (registered trademark). The communication module 88 receives control signals from the outside to control the operation of the distance sensors 31, 32, camera 51, and light source 61, and transmits detection signals from the distance sensors 31, 32, image data captured by the camera 51, and the like. The control module 89 controls the operation of the distance sensors 31, 32, camera 51, and light source 61 based on the control signals received from the outside by the communication module 88.

[Effects of this embodiment]
According to the turning tool unit of this embodiment described above, the holder 80 that holds the turning tool 1 includes a box-shaped casing 84 that houses the holder-side electronic components 85. The holder-side electronic components 85 include a communication module 88 that is electrically connected to the tool-side electronic components P provided in the turning tool 1. This allows the tool-side electronic components P to exchange electrical signals with the outside via the communication module 88 that the holder 80 has in the casing 84. This eliminates the need for connection terminals or wiring for electrical connection with the machine tool main body 201, and these will not be damaged when, for example, attaching or detaching the turning tool 1. This allows the tool-side electronic components P provided in the tool main body 2 to be used stably.

In addition, in this embodiment, the holder-side electronic component 85 is equipped with a control module 89, which allows it to control the operation of the tool-side electronic component P. Furthermore, by receiving control signals from the outside via the communication module 88, the tool-side electronic component P equipped on the turning tool 1 can be controlled from the outside.

In addition, in this embodiment, the holder-side electronic component 85 is equipped with a battery 87, which allows it to supply power to the tool-side electronic component P without receiving power from an external source. Therefore, power wiring to receive power from an external source is also unnecessary.

In addition, in this embodiment, the connection wiring D, one end of which is connected to the tool-side electronic component P, is connected to the holder-side electronic component 85 inside the casing 84 through a housing hole 27 extending in the axial direction Dj. The end of the tool body 2 on the other side Dj2 in the axial direction Dj is provided with a wiring housing groove 29 extending outward in the radial direction Dr from the housing hole 27. The wiring housing groove 29 is recessed on one side Dj1 in the axial direction Dj. Therefore, by housing the connection wiring D in the wiring housing groove 29, damage to the connection wiring D can be prevented when, for example, attaching or detaching the turning tool unit 70A to or from the machine tool body 201.

In addition, in this embodiment, the tool-side electronic components P include at least one of the camera 51, distance sensors 31, 32, and distance sensors 31, 32. This allows signals output from these tool-side electronic components P to be output to the outside via the communication module 88, and the operation of these tool-side electronic components P to be controlled from the outside, all wirelessly.

According to the turning tool unit of this embodiment described above, by attaching the turning tool unit 70A to the machine tool body 201, it is possible to provide a machine tool 200 that allows stable use of the tool-side electronic components P provided in the tool body 2.

(Modification of the embodiment)
In the above embodiment, the turning tool unit 70A mounted on the turret 202 of the machine tool body 201 is exemplified, but the present invention is not limited to this.
11 , for example, the turning tool unit 70B may be configured to be detachably attached to a machining head 212 of a machine tool body 211 by a tool changer (not shown) of a machine tool 210. In this case, the turning tool 1 is held by a holder body 91 of a halter 90. The module 82 is provided on the outer circumferential surface of the holder body 91, for example.

[Other configurations included in the present invention]
The present invention is not limited to the above-described embodiments, and the configurations (elements) described in the above-described embodiments, modifications, and notes may be combined within the scope of the present invention, and additions, omissions, substitutions, and other modifications of the configurations are possible. Furthermore, the present invention is not limited to the above-described embodiments, but is limited only by the claims.

REFERENCE SIGNS LIST 1... Turning tool 2... Tool body 4... Cutting insert 6... Lighting device 23d... Base 27... Accommodating hole (wiring insertion portion)
29... Wiring accommodation groove 31... First distance sensor (distance sensor)
32...Second distance sensor (distance sensor)
DESCRIPTION OF SYMBOLS 51...Camera 70A, 70B...Turning tool unit 80, 90...Holder 81, 91...Holder body 81a...Tool holding portion 82...Module 84...Casing 85...Holder side electronic components 87...Battery 88...Communication module 89...Control module 100...Workpiece 100f...Machine surface 200, 210...Machine tool 201, 211...Machine tool body D...Connection wiring Dj...Axial direction Dj1...One side Dj2...Other side Dr...Radial direction J...Tool axis P...Tool side electronic components

Claims (7)

A turning tool and a holder that holds the turning tool and is attached to a machine tool,
The turning tool is
a tool body extending along a tool axis and having a pedestal at a tip end portion on one side in an axial direction along the tool axis;
a cutting insert detachably attached to the base;
a tool-side electronic component provided in the tool body;
and a connecting wire ;
The holder is
a holder body having a tool holding portion for holding the tool body;
a holder-side electronic component electrically connected to the tool-side electronic component and including a communication module capable of communicating with an external device;
a box-shaped casing that is held by the holder main body and that houses the holder-side electronic components ,
One end of the connection wiring is connected to the tool-side electronic component, and the other end is connected to the holder-side electronic component,
The tool body includes:
a shank portion extending along the tool axis;
a head portion provided at one end of the shank portion in the axial direction and supporting the cutting insert and the tool-side electronic component;
a wire insertion portion that extends in the axial direction from the head portion to the other end of the shank portion in the axial direction and opens at the other end of the shank portion in the axial direction,
the connection wire passes through the wire insertion portion and is led out from the wire insertion portion at the other end of the shank portion in the axial direction.
Turning tool unit. The holder-side electronic component further includes a control module that controls the operation of the tool-side electronic component.
2. A turning tool unit according to claim 1. The holder-side electronic component further includes a battery that supplies power to the tool-side electronic component.
3. A turning tool unit according to claim 1 or 2. The tool body further includes a wire accommodating groove formed at the other end of the shank portion in the axial direction, recessed toward one side in the axial direction, extending from the wire insertion portion toward the outside in a radial direction intersecting the axial direction, and accommodating the connection wire led out from the wire insertion portion toward the outside in the radial direction .
A turning tool unit according to any one of claims 1 to 3. The tool side electronic component is
a camera device for photographing a surface of a workpiece that has been machined by the cutting insert;
an illumination device for illuminating the processing surface;
and a distance sensor for detecting the distance to the processing surface.
including at least one of
A turning tool unit according to any one of claims 1 to 4. The casing is disposed on the other side of the head portion in the axial direction.
A turning tool unit according to any one of claims 1 to 5. A turning tool unit according to any one of claims 1 to 6 ;
a machine tool body to which the turning tool unit is attached and which performs cutting on a workpiece with the cutting insert;
Machine tools.