Turning tools

Abstract

To provide a lathe tool capable of satisfactorily checking a state of a machined surface of a cut object.SOLUTION: A lathe tool comprises: a tool body extending along a tool shaft and having a pedestal at a tip on one side in an axial direction along the tool shaft; a cutting insert detachably mounted on the pedestal; and a camera disposed on the tool body, for photographing a machined surface of a cut material cut by the cutting insert. The camera is disposed to enable photographing the outside in a radial direction of the tool body intersecting the axial direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] In cutting processes using machine tools such as lathes and machining centers, it is sometimes desirable to check the condition of the machined surface of a workpiece during processing. Patent Document 1 discloses a configuration equipped with a camera that photographs the machined surface cut by a cutting tool (bite). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-229873 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above configuration, the camera is located outside the cutting device, separately from the cutting device. Therefore, when performing boring or other operations on a workpiece, once the cutting blade is inserted into the hole formed in the workpiece, it is difficult to photograph the inner diameter surface of the hole, which is the surface machined by the cutting blade. Therefore, after cutting, the cutting tool must be removed from the hole before photographing the inner diameter surface of the hole. Furthermore, it is difficult for external lighting or room light to reach the inside of the hole, making it difficult to check the machined surface even after machining.

[0005] In view of the above circumstances, one of the objects of the present invention is to provide a turning tool that allows the state of the machined surface of a workpiece to be checked in an excellent manner. [Means for solving the problem]

[0006] One aspect of the turning tool of the present invention comprises a tool body extending along a tool axis and having a base at its tip on one side in the axial direction along the tool axis, a cutting insert removably attached to the base, and a camera provided on the tool body for photographing the machined surface of a workpiece machined by the cutting insert, the camera being positioned so as to be able to photograph the radially outer side of the tool body that intersects with the axial direction.

[0007] According to one aspect of the turning tool of the present invention, a camera is provided on the tool body together with a cutting insert. The camera is positioned so as to be able to photograph the radially outer side of the tool body. This configuration makes it possible to photograph the machined surface even if the machined surface by the cutting insert is the inner diameter surface of the workpiece. Furthermore, there is no need to secure space for installing a camera and lighting device separately from the tool body. As a result, the condition of the machined surface of the workpiece can be clearly observed.

[0008] In the turning tool, the camera may photograph a machining surface of a workpiece that is machined by the cutting insert from a direction perpendicular to the machining surface.

[0009] In this case, the camera photographs the processed surface from a direction perpendicular to the processed surface, making it easier to check the condition of the processed surface more accurately from the captured image than when photographing from a direction inclined to the processed surface.

[0010] In the turning tool, the base may be arranged on a first side of the tool axis in a radial direction of the tool body that intersects the axial direction, and the camera may be arranged on a second side of the radial direction of the tool axis.

[0011] In this case, the base on which the cutting insert is attached and the camera are arranged on opposite sides of the tool axis in the radial direction. This prevents chips generated when the cutting insert cuts the workpiece from reaching the camera. This prevents chips from interfering with camera photography and damaging the camera.

[0012] In the turning tool, the camera may be arranged at the same position in the axial direction as the cutting insert attached to the base, or on the other side in the axial direction.

[0013] In this case, if the camera is disposed at the same axial position as the cutting insert, the machined surface being cut by the cutting insert can be photographed in more real time. If the camera is disposed on the other axial side of the cutting insert, the machined surface can be photographed while preventing chips generated by the cutting insert from reaching the camera.

[0014] The turning tool may further include a distance sensor attached to the tip of the tool body, and the camera may be disposed on the other side of the distance sensor in the axial direction.

[0015] In this case, by providing a distance sensor, the machined surface machined using the cutting insert can be measured by the distance sensor. In this way, when the distance sensor is provided, the camera is disposed on the other side of the distance sensor in the axial direction. This allows the camera to be brought closer to the machining position by the cutting insert in the axial direction while providing the distance sensor, and allows the machined surface to be photographed well.

[0016] The turning tool may further include a lighting device provided on the tool body that illuminates the machining surface photographed by the camera, and the camera may be positioned between the base and the lighting device in the axial direction.

[0017] In this case, a lighting device is provided on the tool body. This allows the lighting device to illuminate the machined surface photographed by the camera, thereby enabling the state of the machined surface to be photographed more clearly. The camera is disposed between the base and the lighting device. This allows the machined surface illuminated by the lighting device to be photographed from a position closer to the machining position by the cutting insert in the axial direction. Therefore, the machined surface can be photographed well.

[0018] In the above-described turning tool, the camera is accommodated in an accommodating recess formed in the tool body, and the tool further includes a camera cover attached to the tool body and covering the accommodating recess and the camera, and the camera cover may have an outer peripheral inclined surface that slopes radially outward in the axial direction from the lighting device side toward the camera lens side.

[0019] In this case, the camera is accommodated in an accommodation recess formed in the tool body. The accommodation recess and the camera accommodated in the accommodation recess are covered by a camera cover. This prevents the camera from being damaged by chips generated during cutting. The cover member has an opening, so that illumination light from the light source can be irradiated onto the machining surface while preventing damage to the light source. In addition, the camera cover has an outer peripheral inclined surface that slopes radially outward from the lighting device side toward the camera lens side. This prevents the illumination light from the lighting device from being blocked by the camera cover, allowing the machining surface to be photographed by the camera to be well illuminated. [Effects of the Invention]

[0020] According to the turning tool of one aspect of the present invention, the condition of the machined surface of the workpiece can be checked well. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view of a turning tool according to an embodiment of the present invention; [Figure 2] FIG. 1 is a plan view of a turning tool according to an embodiment of the present invention. [Figure 3]1 is a perspective view of a head portion of a turning tool according to an embodiment of the present invention. FIG. [Figure 4] FIG. 2 is a cross-sectional view of a head portion of one embodiment of the present invention. [Figure 5] FIG. 4 is a perspective view of the head portion of the embodiment of the present invention, seen from a direction different from that of FIG. 3. [Figure 6] 1 is a cross-sectional view showing a camera cover according to an embodiment of the present invention. [Figure 7] FIG. 2 is a view of the camera cover of the embodiment of the present invention as viewed from the axial direction. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, a turning tool 1 according to an embodiment of the present invention will be described with reference to the drawings. In the following drawings, the scale and number of each structure may differ from the actual structure in order to make each component easier to understand.

[0023] <Turning tools> Fig. 1 is a perspective view of a turning tool 1 according to an embodiment. Fig. 2 is a plan view of the turning tool 1. Fig. 3 is a perspective view of a head portion 22 of the turning tool 1.

[0024] The turning tool 1 of this embodiment performs turning, 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 by 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.

[0025] As shown in FIGS. 1 to 3, a 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.

[0026] The tool body 2 extends in an 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.

[0027] The head portion 22 has a protrusion 23 that protrudes from the outer peripheral surface of the shank portion 21 outward in a radial direction Dr of the tool body 2 that 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 arranged on a first side Dr1 in the radial direction Dr with respect to the tool axis J in the tool body 2.

[0028] 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 portion 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 the one side Dj1 in the axial direction Dj. In addition, the cutting edge 42 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 the one side Dj1 in the axial direction Dj of the tool body 2 and at the outermost end in the radial direction Dr.

[0029] 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, thereby increasing the versatility of the tool body 2.

[0030] FIG. 4 is a cross-sectional view of the head portion 22. 3 and 4, 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.

[0031] The sensor device 3 includes a sensor bracket 30, a first distance sensor (distance sensor) 31, and a second distance sensor (distance sensor) 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.

[0032] As shown in FIG. 4, 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 away from a 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 a 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 (the 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 against which a camera cover 53, described later, abuts. 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.

[0033] As shown in FIG. 3, the sensor bracket 30 is fastened to the sensor support surface 24f with a plurality of 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 arranged facing outward in the radial direction Dr. The first distance sensor 31's measurement direction is the outward direction of the radial direction Dr. The second distance sensor 32 is arranged facing one side Dj1 of the axial direction Dj. The second distance sensor 32 measures the distance to a measurement object arranged on the tip side of the tool body 2. That is, the second distance sensor 32's measurement direction is one side Dj1 of the axial direction Dj.

[0034] Fig. 5 is a perspective view of the head unit 22 seen from a different direction than that of Fig. 3. In Fig. 5, the head unit 22 is shown with the camera cover 53 and the cover member 62 removed. As shown in FIG. 4, 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 27 formed in the tool body 2 and extending in the axial direction Dj. As shown in FIG. 5, 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 part 24. The sensor cable 35 of the second distance sensor 32 extends from the sensor support part 24 to the other side Dj2 in the axial direction Dj through the insertion hole 24h.

[0035] 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 tend to maintain stable measurement accuracy despite 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.

[0036] 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 the machined surface 100f. Because 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 temporarily separating 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 during dimensional measurement, 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.

[0037] 3 and 4, the imaging device 5 is provided in 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 with respect to the sensor device 3, with the tool axis J sandwiched between them. The imaging device 5 is disposed between the base 23d and the lighting device 6 in the axial direction Dj. As shown in FIG. 4, the imaging device 5 includes a camera 51, a camera cover 53, and a camera seal member 57.

[0038] The camera 51 is, for example, a waterproof CMOS image sensor or a CCD image sensor. As shown in FIGS. 4 and 5, the camera 51 is accommodated in an accommodating recess 25 formed in the head portion 22 of the tool body 2. The accommodating recess 25 is formed in 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 so as to rise from an end of one side Dj1 in the axial direction Dj of the first surface 22a to the outside in the radial direction Dr. The accommodating recess 25 is recessed inward in the radial direction Dr from the first surface 22a. As shown in FIG. 5, the sensor cable 35 of the second distance sensor 32 extending from the sensor support portion 24 to the other side Dj2 in the axial direction Dj is guided through the accommodating recess 25 to an accommodating hole 27 (see FIG. 4) formed inside the head portion 22 and the shank portion 21.

[0039] The camera 51 has a lens unit 51p facing the object to be photographed. The lens unit 51p has a lens (not shown) built into the camera and a lens protection cover 51c that covers the lens and is exposed inside a camera opening 54, which will be described later. The camera 51 is disposed so that the lens protection cover 51c of the lens unit 51p faces outward in the radial direction Dr. The camera 51 is disposed so as to be able to photograph the outside of the tool body 2 in the radial direction Dr. As shown in FIG. 2, the camera 51 photographs a machined surface 100f, which faces inward in the radial direction Dr, of the workpiece 100 that has been machined by the cutting insert 4, that is, a so-called inner diameter surface.

[0040] As shown in FIG. 4, the camera 51 is disposed 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 dispose the camera 51 in a position 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. Also, for example, if the sensor device 3 is disposed in a position different from the above, the camera 51 may be disposed in the same position in the axial direction Dj with respect 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.

[0041] The camera 51 has a camera cable 52. The camera cable 52 is housed in the housing hole 27 formed inside the head portion 22 and the shank portion 21, together with the sensor cables 34 and 35.

[0042] FIG. 6 is a cross-sectional view showing the camera cover 53. As shown in FIG. 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. 4 and 6 , 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.

[0043] As shown in FIGS. 4 to 6, 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 in an annular shape 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. The first seal portion 55a is bent in a U-shape when viewed from the outside in the radial direction Dr. The first seal portion 55a extends along three sides of the outer periphery of the installation recess 25, excluding one side Dj1 on one side in the axial direction Dj.

[0044] 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 an end portion on one side Dj1 of the first seal portion 55a 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.

[0045] FIG. 7 is a view of the camera cover 53 as seen from the axial direction Dj. 7, 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.

[0046] As shown in FIG. 3, the camera cover 53 is fixed to the tool body 2 by, for example, two bolts 59. As shown in FIGS. 4 and 5, screw holes 22n into which the bolts 59 are screwed are formed at predetermined positions on the first surface 22a of the head portion 22. As shown in FIG. 4, each bolt 59 integrally includes a screw shank 59a and a screw head 59b. The screw shank 59a is screwed into the screw 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 screw shank 59a. The screw head 59b is formed to have a larger diameter than the screw shank 59a. A bearing surface 59z of the screw head 59b is formed in a tapered shape so that the diameter gradually increases along the direction in which the screw shank 59a extends.

[0047] 4 and 6, bolt insertion hole 53h formed in camera cover 53 has inclined surface 53s tapered so that the hole diameter gradually increases from the inside to the outside in the radial direction Dr. When threaded shank 59a of bolt 59 is threaded through bolt insertion hole 53h and into screw hole 22n, bearing surface 59z of screw head 59b abuts against inclined surface 53s. When bolt 59 is tightened with a predetermined torque, bearing surface 59z abuts against inclined surface 53s, fixing camera cover 53 in a predetermined position.

[0048] 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 bearing 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 bearing surface 59z abuts against the inclined surface 53s, the second opposing surface 53b and the second surface 22b of the camera cover 53 come into close contact and crushing the second seal portion 55b. That is, in the process of tightening the bolt 59, 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, by simply tightening the bolt 59 along the radial direction Dr, the camera cover 53 can be attached to the tool body 2 so as to be pressed against both the first surface 22a and the second surface 22b. Therefore, the sealing performance between the camera cover 53 and the tool body 2 by the seal member 55 is improved.

[0049] The camera cover 53 has a camera opening 54 at a position facing the lens portion 51p of the camera 51. The camera opening 54 penetrates in a direction connecting a first opposing surface 53a facing the accommodating recess 25 and a cover outer peripheral surface 53f facing 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 disposed inside the camera opening 54 and takes pictures through the camera opening 54.

[0050] As shown in FIG. 6 , 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 installation 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 the present 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 only needs to be formed at 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, and the coolant easily flows out of the camera opening 54.

[0051] As shown in FIG. 4, 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 is made of a so-called O-ring. The camera seal member 57 is made of an elastic material such as a rubber-based material. The camera seal member 57 is sandwiched between the lens portion 51p and the camera cover 53, thereby preventing coolant from entering the camera cover 53 through the camera opening 54.

[0052] 6, the camera cover 53 has a cover-side recess 53c that houses the camera seal member 57. By housing the camera seal member 57 in the cover-side recess 53c, misalignment of the camera seal member 57 and the camera 51 is suppressed.

[0053] 2, the lighting device 6 is provided on the tool body 2 and illuminates the machined surface 100f to be photographed by the camera 51. As shown in FIGS. 3 and 4, the lighting device 6 is disposed on the other side Dj2 in the axial direction Dj with respect 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 and 32 of the sensor device 3 and the lighting device 6 in the axial direction Dj. The lighting device 6 includes a light source 61 and a cover member 62.

[0054] The light source 61 is a light-emitting element such as an LED. As shown in Fig. 5, the light source 61 is disposed on a third surface 22c facing outward in the radial direction Dr in the head portion 22. The third surface 22c may be continuous with the first surface 22a, but in this embodiment, the third surface 22c is formed to be staggered from the first surface 22a in the radial direction Dr.

[0055] 3, the cover member 62 is fixed to the third surface 22c of the tool body 2 by the bolt 28. The cover member 62 covers at least a portion of the light source 61. The cover member 62 fixes the light source 61 by sandwiching the light source 61 between itself and the head portion 22.

[0056] 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 a cover back surface 62b facing the light source 61 side and a cover front surface 62f facing the opposite side 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 the 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 dimension gradually increases from the cover back surface 62b side toward the cover front surface 62f side.

[0057] 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 slit 63s is diffused radially, so that the illumination light is irradiated over a wider range of the processing surface 100f.

[0058] 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. 3 and 4, the camera cover 53 is adjacent to the cover member 62 on one side Dj1 in the axial direction Dj. 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 of the camera 51 (the camera opening 54 side) 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.

[0059] [Effects of this embodiment] According to the turning tool of this embodiment described above, the camera 51 is provided on the tool body 2 together with the cutting insert 4. The camera 51 is arranged so as to be able to photograph the outer side in the radial direction Dr of the tool body 2. With this configuration, even if the machined surface 100f is the inner diameter surface of the workpiece 100, the machined surface 100f can be photographed. Moreover, there is no need to secure space for installing the camera 51 and the lighting device 6 separately from the tool body 2. As a result, the state of the machined surface 100f of the workpiece 100 can be observed well.

[0060] Furthermore, in this embodiment, the camera 51 photographs the processing surface 100f from a direction perpendicular to the processing surface 100f, so that the captured image makes it easier to check the condition of the processing surface 100f more accurately than when photographing from a direction inclined to the processing surface 100f.

[0061] Furthermore, in this embodiment, the base 23d to which the cutting insert 4 is attached and the camera 51 are arranged on opposite sides of the tool axis J in the radial direction Dr. This prevents chips generated when the cutting insert 4 cuts the workpiece 100 from reaching the camera 51. This prevents chips from interfering with the camera 51's photography and damaging the camera 51.

[0062] Furthermore, in this embodiment, the camera 51 is disposed on the other side Dj2 in the axial direction Dj with respect to the cutting insert 4. This makes it possible to photograph the machined surface 100f while preventing chips generated by cutting with the cutting insert 4 from reaching the camera 51. Furthermore, by disposing the camera 51 at the same position in the axial direction Dj with respect to the cutting insert 4, it is possible to photograph the machined surface 100f machined by the cutting insert 4 from a closer position.

[0063] Furthermore, in this embodiment, by providing the distance sensors 31 and 32, the machined surface 100f machined using the cutting insert 4 can be measured by the distance sensors 31 and 32. The camera 51 is disposed on the other side Dj2 in the axial direction Dj of the distance sensors 31 and 32. This allows the camera 51 to be brought closer to the machining position by the cutting insert 4 in the axial direction Dj while providing the distance sensors 31 and 32, and allows the machined surface 100f to be photographed well.

[0064] Furthermore, in this embodiment, the tool body 2 is provided with an illumination device 6. This allows the illumination device 6 to illuminate the machined surface 100f photographed by the camera 51, thereby enabling the state of the machined surface 100f to be photographed more clearly. The camera 51 is disposed between the base 23d and the illumination device 6. This allows the machined surface 100f illuminated by the illumination device 6 to be photographed from a position closer to the machining position by the cutting insert 4 in the axial direction Dj. Therefore, the machined surface 100f can be photographed well.

[0065] In this embodiment, the camera 51 is accommodated in an accommodation recess 25 formed in the tool body 2. The accommodation recess 25 and the camera 51 accommodated in the accommodation recess 25 are covered by a camera cover 53. This prevents the camera 51 from being damaged by chips generated during cutting. The cover member 62 has an opening 63, which allows illumination light from the light source 61 to be irradiated onto the machined surface 100f while preventing damage to the light source 61. The camera cover 53 also has an outer peripheral inclined surface 53g. This prevents the illumination light from the lighting device 6 from being blocked by the camera cover 53, allowing the machined surface 100f to be photographed by the camera 51 to be well illuminated.

[0066] [Other configurations included in the present invention] The present invention is not limited to the above-described embodiment, and may be modified within the scope of the present invention. The configurations (elements) described in the above-described embodiments, modifications, and notes may be combined, and additions, omissions, substitutions, and other modifications of the configurations are possible. The present invention is not limited to the above-described embodiments, but is limited only by the claims. [Explanation of symbols]

[0067] 1...Turning tool 2…Tool body 4...Cutting insert 6...Lighting equipment 23d…Pedestal 25... Storage recess 31...First distance sensor (distance sensor) 32...Second distance sensor (distance sensor) 51...Camera 51p...Lens section 53...Camera cover 53g…Outer sloping surface 100…Work material 100f…processed surface Dj…Axis direction Dj1...one side Dj2...other side Dr…Radial direction Dr1…first side Dr2…Second Side J…tool axis

Claims

1. 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 camera provided on the tool body for photographing a machined surface of a workpiece machined by the cutting insert; Equipped with the camera is arranged so as to be able to photograph an outer side in a radial direction of the tool body that intersects with the axial direction, The cutting insert and the camera attached to the base are are arranged on opposite sides of the tool axis, and arranged at the same position in the axial direction or on the other side in the axial direction. Turning tools.

2. 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 camera provided on the tool body for photographing a machined surface of a workpiece machined by the cutting insert; Equipped with the camera is arranged so as to be able to photograph an outer side in a radial direction of the tool body that intersects with the axial direction, The camera is accommodated in an accommodating recess formed in the tool body, a camera cover attached to the tool body and covering the accommodating recess and the camera, The camera cover has an outer peripheral inclined surface that is inclined radially outward in the axial direction from the lighting device side toward the lens unit side of the camera. Turning tools.

3. The tool body further includes a distance sensor attached to the tip portion, The turning tool according to claim 1 or 2, wherein the camera is disposed on the other side of the distance sensor in the axial direction.

4. The tool further includes an illumination device provided on the tool body for illuminating the processing surface photographed by the camera, The turning tool according to claim 1 , wherein the camera is disposed between the base and the lighting device in the axial direction.

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