Turning tools

Abstract

To provide a lathe tool which achieves improvement of sealability in a portion where electronic components are housed in a tool body to prevent a coolant from affecting the electronic components.SOLUTION: A lathe tool includes: a tool body; a cutting insert; a camera housed in a housing recessed part; a camera cover; and an annular seal member which is sandwiched between the camera cover and the tool body and seals an outer periphery part of the housing recessed part. The tool body has: a first surface which is formed so as to enclose the outer periphery part of the housing recessed part and faces to the radial outer side of the tool body; and a second surface facing the other side in an axial direction. The camera cover has: a first facing surface facing the first surface; and a second facing surface facing the second surface. The seal member has: a first seal part sandwiched between the first surface and the first facing surface; and a second seal part sandwiched between the second surface and the second facing surface.SELECTED DRAWING: Figure 4

Description

Technical Field

[0004]

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

Background Art

[0002] In machine tools such as lathes and machining centers, during machining, a liquid coolant is supplied to the periphery of the machined surface by the cutting edge of the cutting tool. Therefore, there is a possibility that the coolant may interfere with the photography by the camera. Also, not only the camera, but also electronic components arranged at positions affected by the coolant may be similarly affected. In Patent Document 1, a configuration is disclosed in which an insert having a cutting edge can be attached to a tool body (holder) that houses electronic components such as sensors and antenna members. In this configuration, an annular seal member (resin member) is sandwiched between the opening and closing parts of the tool body, thereby enhancing the sealing performance and suppressing the influence on the components housed inside.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, depending on the shape of the part of the tool body where the electronic components are housed, it may be difficult to maintain the sealing performance.

[0005] In view of the above circumstances, an object of the present invention is to provide a turning tool capable of enhancing the sealing performance at the part of the tool body where the electronic components are housed and suppressing the influence of the coolant on the electronic components.

Means for Solving the Problems

[0006] One embodiment of the turning tool of the present invention comprises a tool body extending along a tool axis and having a base at one end in the axial direction along the tool axis; a cutting insert detachably attached to the base; an electronic component housed in a housing recess formed in the tool body; an electronic component cover mounted on the tool body and covering the housing recess and the electronic component; and an annular sealing member sandwiched between the electronic component cover and the tool body and sealing the outer periphery of the housing recess, wherein the tool body is formed to surround the outer periphery of the housing recess and in the axial direction The tool body has a first surface facing radially outward and intersecting with respect to the first surface, and a second surface rising radially outward from the first surface and facing the other side in the axial direction. The electronic component cover has a first opposing surface facing the first surface and a second opposing surface facing the second surface. The sealing member has a first sealing portion extending along the first surface and sandwiched between the first surface and the first opposing surface, and a second sealing portion rising radially outward from the first sealing portion and extending along the second surface and sandwiched between the second surface and the second opposing surface.

[0007] According to one embodiment of the turning tool of the present invention, a sealing member is provided that is sandwiched between an electronic component cover and the tool body to seal the outer periphery of the housing recess. The sealing member is sandwiched between a first surface formed on the tool body so as to surround the outer periphery of the housing recess, and a second surface rising radially outward from the first surface, and a first opposing surface and a second opposing surface on the electronic component cover. As a result, the sealing performance between the first and second surfaces of the tool body, which are bent in an L-shape rather than being flat, and the first and second opposing surfaces of the electronic component cover can be enhanced by the sealing member. Therefore, it is possible to prevent liquid coolant used during cutting from reaching the electronic component housed in the housing recess of the tool body, which is covered by the electronic component cover. As a result, it is possible to enhance the sealing performance in the part of the tool body where the electronic component is housed and to suppress the effect of coolant on the electronic component.

[0008] In the turning tool described above, the tool body further comprises a distance sensor attached to the tip, the tool body having a sensor support portion formed on the other side in the axial direction relative to the distance sensor, the sensor support portion having a sensor support surface on one side in the axial direction that supports the distance sensor facing the one side in the axial direction, and having the second surface on the other side in the axial direction.

[0009] In this case, the tool body has a sensor support portion. The sensor support portion has a sensor support surface on one side in the axial direction. This allows the distance sensor attached to the tip of the tool body to be supported by the sensor support portion. On the other side in the axial direction, the sensor support portion has a second surface that faces the second opposing surface of the electronic component cover. This improves the sealing performance between the sensor support portion that supports the distance sensor and the electronic component cover that covers the electronic component when a distance sensor is provided.

[0010] In the turning tool described above, the sensor support portion has a through hole that penetrates in the direction connecting the sensor support surface and the second surface, through which a sensor cable led out from the distance sensor is inserted, and the electronic component cover may have an opening on the second opposing surface at the end of a cable housing portion that accommodates the sensor cable extending from the through hole to the other side in the axial direction, and the second seal portion may be arranged to surround the through hole and the end of the cable housing portion.

[0011] In this case, the sensor support portion has a through-hole through which a sensor cable led from the distance sensor is inserted. The electronic component cover has an opening on the second opposing surface where the end of a cable housing portion accommodates the sensor cable extending axially from the through-hole to the other side. The second seal portion is positioned to surround the through-hole and the end of the cable housing portion. This improves the sealing performance between the sensor support portion and the electronic component cover when a sensor cable is arranged to span between the sensor support portion and the electronic component cover.

[0012] The turning tool described above further comprises a bolt for fixing the electronic component cover to the tool body, the bolt having a screw shaft portion that is screwed into a screw hole formed on the first surface of the tool body through a bolt insertion hole formed in the electronic component cover, and a screw head having a tapered seating surface whose diameter gradually increases in the direction extending from the screw shaft portion, and the electronic component cover may have an inclined surface such that the seating surface of the bolt fastened to the screw hole abuts against the bolt insertion hole, thereby displacing the electronic component cover to one side in the axial direction and pressing the second opposing surface toward the second surface.

[0013] In this case, the bolt that secures the electronic component cover to the tool body has a tapered seating surface. The electronic component cover has an inclined surface in the bolt insertion hole. As a result, when the threaded shaft of the bolt is screwed into the threaded hole formed on the first surface of the tool body, the seating surface of the bolt comes into contact with the inclined surface, displacing the electronic component cover to one side in the axial direction and pressing the second opposing surface toward the second surface. This allows the sealing member to adhere more tightly to the second surface of the sensor support and the second opposing surface of the electronic component cover. Therefore, by simply tightening the bolt that secures the electronic component cover to the first surface of the tool body, the sealing performance between the sensor support and the electronic component cover can also be improved.

[0014] In the above-described turning tool, the electronic component may be a camera that photographs the machined surface of the workpiece that has been cut by the cutting insert.

[0015] In this case, a camera is included as an electronic component. This allows the machined surface to be photographed even if it is the inner diameter surface of the workpiece during cutting with a cutting insert. As a result, the condition of the machined surface of the workpiece can be observed clearly.

[0016] In the turning tool described above, the electronic component cover may further include a camera opening at a position facing the lens portion of the camera, which penetrates in a direction connecting the first opposing surface and the outer peripheral surface of the electronic component cover opposite to the first opposing surface, an annular camera seal member sandwiched between the lens portion of the camera and the outer peripheral surface of the camera opening, and a transparent plate-shaped lens protective cover.

[0017] In this case, the electronic component cover has a camera opening positioned opposite the camera lens. This allows the camera to photograph the processed surface through the camera opening. A camera sealing member is sandwiched between the camera lens and the camera opening of the electronic component. This enhances the sealing performance between the camera opening of the electronic component and the camera lens. In addition, with the above configuration, the lens protection cover prevents the lens from being exposed through the camera opening and protects the lens. Furthermore, because the lens protection cover is plate-shaped, gaps are less likely to form between it and the camera sealing member, further enhancing the sealing performance between the camera opening of the camera cover and the camera lens.

[0018] In the turning tool described above, the electronic component cover may be provided with a recess extending from the first opposing surface, the camera sealing member, and the cover-side recess for housing the lens portion.

[0019] In this case, the electronic component cover includes a recess on the cover side that accommodates the camera sealing member and the lens portion. This allows the camera sealing member and the camera lens portion to be held by the electronic component cover, thereby preventing movement in the axial direction and other directions.

[0020] In the turning tool described above, the camera may be positioned to capture images of the radially outer side of the tool body intersecting the axial direction.

[0021] In this case, the camera is arranged so as to be able to photograph the radially outer side of the tool body, whereby it is possible to photograph the machining surface even if the machining surface is the inner diameter surface of the workpiece during machining with the cutting insert.

[0022] In the turning tool, the pedestal may be arranged on the first side with respect to the tool axis in the radial direction of the tool body intersecting the axial direction, and the camera may be arranged on the second side in the radial direction with respect to the tool axis.

[0023] In this case, the pedestal to which the cutting insert is attached and the camera are arranged on opposite sides sandwiching the tool axis in the radial direction. Thereby, it is possible to suppress the chips generated by cutting the workpiece with the cutting insert from reaching the camera. Therefore, it is possible to suppress the chips from interfering with the photographing by the camera and from damaging the camera.

[0024] In the turning tool, the camera may be arranged at the same position as the cutting insert in the axial direction or on the other side in the axial direction with respect to the cutting insert attached to the pedestal.

[0025] In this case, if the camera is arranged at the same position as the cutting insert in the axial direction, the machining surface during machining by the cutting insert can be photographed in a more real-time manner. If the camera is arranged on the other side in the axial direction with respect to the cutting insert, it is possible to photograph the machining surface while suppressing the chips generated by the cutting by the cutting insert from reaching the camera.

[0026] In the turning tool, the tool body may further include a lighting device that illuminates the machining surface photographed by the camera, and the camera may be arranged between the pedestal and the lighting device in the axial direction.

[0027] In this case, a lighting device is provided on the tool body. This allows the machined surface, which is photographed by the camera, to be illuminated by the lighting device, thereby enabling clearer imaging of the machined surface. The camera is positioned 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 in good quality. [Effects of the Invention]

[0028] According to one embodiment of the present invention, a turning tool can be used to improve the sealing performance in the part of the tool body where electronic components are housed, thereby suppressing the influence of coolant on the electronic components. [Brief explanation of the drawing]

[0029] [Figure 1] This is a perspective view of a turning tool according to one embodiment of the present invention. [Figure 2] This is a plan view of a turning tool according to one embodiment of the present invention. [Figure 3] This is a perspective view of the head of a turning tool according to one embodiment of the present invention. [Figure 4] This is a cross-sectional view of the head portion of one embodiment of the present invention. [Figure 5] This is a perspective view of the head portion of one embodiment of the present invention, viewed from a different direction than in Figure 3. [Figure 6] This is a cross-sectional view showing a camera cover (electronic component cover) of one embodiment of the present invention. [Figure 7] This is a view of the camera cover (electronic component cover) of one embodiment of the present invention, seen from the axial direction. [Modes for carrying out the invention]

[0030] The turning tool 1 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 may differ from the actual structure in order to make the components easier to understand.

[0031] <Turning Tools> Figure 1 is a perspective view of the turning tool 1 according to an embodiment. Figure 2 is a plan view of the turning tool 1. Figure 3 is a perspective view of the head portion 22 of the turning tool 1.

[0032] 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 post) not shown. The jig that holds the turning tool 1 is fixed to a machine tool (lathe) such as a lathe not shown.

[0033] As shown in Figures 1 to 3, the turning tool 1 of this embodiment comprises a tool body 2, a cutting insert 4, a sensor device 3, an imaging device 5, and an illumination device 6.

[0034] 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 axial direction Dj of the tool body 2 relative to the shank portion 21.

[0035] The head portion 22 has a projection 23 that protrudes outward from the outer circumferential surface of the shank portion 21 in the radial direction Dr of the tool body 2, intersecting the axial direction Dj. A base 23d is provided on the projection 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 in the radial direction Dr with respect to the tool axis J in the tool body 2.

[0036] 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 in the radial direction Dr of the tool body 2. 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 radial direction Dr.

[0037] According to this embodiment, the cutting insert 4 is fixed to the tool body 2 via an 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.

[0038] Figure 4 is a cross-sectional view of the head portion 22. As shown in Figures 3 and 4, the sensor device 3, imaging device 5, and illumination device 6 are provided on the head portion 22. The sensor device 3, imaging device 5, and illumination device 6 are positioned on the second side Dr2 in the radial direction Dr with respect to the tool axis J on the tool body 2. In other words, the sensor device 3, imaging device 5, and illumination device 6 are 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 radial direction Dr of the tool body 2.

[0039] The sensor device 3 comprises 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.

[0040] As shown in Figure 4, a sensor support portion 24 is provided on one side Dj1 of the axial direction Dj of the head portion 22. The sensor support portion 24 is formed at a predetermined distance from the tip 22s of one side Dj1 of the axial direction Dj of the head portion 22 to the other side Dj2 of the axial direction Dj. Between the tip 22s and the sensor support portion 24, a positioning surface 22t is formed, which is a flat surface facing the second side Dr2 of the radial direction Dr. The sensor support portion 24 protrudes outward (second side Dr2) of the radial direction Dr from the positioning surface 22t. The sensor support portion 24 has a sensor support surface 24f that supports the sensor device 3 and a second surface 22b against which the camera cover (electronic component cover) 53, which will be described later, abuts. The sensor support surface 24f is a flat surface facing one side Dj1 of the axial direction Dj. The second surface 22b is a flat surface facing the other side Dj2 of the axial direction Dj.

[0041] As shown in Figure 3, the sensor bracket 30 is fastened to the sensor support surface 24f by 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 positioned facing outward in the radial direction Dr. The measurement direction of the first distance sensor 31 is outward in 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 the object to be measured, which is located on the tip side of the tool body 2. That is, the measurement direction of the second distance sensor 32 is one side Dj1 in the axial direction Dj.

[0042] Figure 5 is a perspective view of the head unit 22, taken from a different direction than in Figure 3. In Figure 5, the head unit 22 is shown with the camera cover 53 and cover member 62 removed. As shown in Figure 4, the first distance sensor 31 has a sensor cable 34. The sensor cable 34 of the first distance sensor 31 is led out radially inward from the first distance sensor 31 in the Dr direction. The sensor cable 34 is formed within the tool body 2 and housed in a housing hole 27 that extends in the axial direction Dj. As shown in Figure 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. The sensor support portion 24 has an insertion hole 24h that opens to the second surface 22b. 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.

[0043] The first distance sensor 31 and the second distance sensor 32 measure the distance to the machined surface 100f processed 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, which was processed by 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, which was processed by the cutting insert 4. In this embodiment, for example, 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. Furthermore, eddy current sensors tend to maintain stable measurement accuracy against disturbances such as the surrounding environment. For this reason, eddy current sensors are suitable for distance measurement in environments with many disturbances after machining, compared to optical distance sensors, regardless of whether wet machining or dry machining is selected.

[0044] 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 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 material processed by the cutting insert 4. The second distance sensor can measure the axial position of the stepped portion and the bottom of the hole in the cutting insert.

[0045] As shown in Figures 3 and 4, the imaging device 5 is mounted on the head portion 22 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 is positioned between the base 23d and the illumination device 6 in the axial direction Dj. As shown in Figure 4, the imaging device 5 includes a camera (electronic component) 51, a camera cover 53, and a camera sealing member 57.

[0046] The camera 51 is, for example, a waterproof CMOS image sensor or a CCD image sensor. As shown in Figures 4 and 5, 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 of the tool body 2, facing outward in the radial direction Dr (second side Dr2). The aforementioned second surface 22b is formed to rise outward in the radial direction Dr from the end of one side Dj1 in the axial direction Dj of the first surface 22a. The housing recess 25 is formed recessed inward from the first surface 22a in the radial direction Dr. As shown in Figure 5, 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 Figure 4) formed inside the head portion 22 and the shank portion 21.

[0047] The camera 51 has a lens portion 51p facing 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 to the inside of the camera opening 54, which will be described later. The lens protection cover 51c is in the shape of a transparent plate. 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 lens protection cover 51c, together with the camera seal member 57, is sandwiched between the lens portion 51p of the camera 51 and the outer circumference of the camera opening 54. 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 Figure 2, the camera 51 photographs 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 radial direction Dr.

[0048] As shown in Figure 4, the camera 51 is positioned on the other side Dj2 in the axial direction Dj relative to the cutting insert 4 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, for example, the sensor device 3 is positioned in a different location than described 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 machining by the cutting insert 4.

[0049] The camera 51 has a camera cable 52. The camera cable 52 is housed together with the sensor cables 34 and 35 in a housing hole 27 formed inside the head portion 22 and the shank portion 21.

[0050] Figure 6 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 housing recess 25 and the camera 51. As shown in Figures 4 and 6, the camera cover 53 has a first opposing surface 53a that faces inward in the radial direction Dr and faces the first surface 22a, and a second opposing surface 53b that faces one side Dj1 in the axial direction Dj and faces the second surface 22b. The camera cover 53 covers the camera 51 and the housing recess 25 by positioning the first opposing surface 53a opposite the outer circumference of the housing recess 25 in which the camera 51 is housed. The second opposing surface 53b of the camera cover 53 faces the second surface 22b of the sensor support portion 24.

[0051] As shown in Figures 4 to 6, a sealing member 55 is sandwiched between the camera cover 53 and the head portion 22 of the tool body 2. The sealing member 55 is continuous in an annular shape as a whole. The sealing member 55 has a first sealing portion 55a and a second sealing portion 55b. The first sealing 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 sealing portion 55a is formed by bending in a U shape. The first sealing portion 55a extends along three sides of the outer circumference of the receiving recess 25, excluding one side Dj1 on one side in the axial direction Dj.

[0052] The second seal portion 55b is continuous with the first seal portion 55a. The second seal portion 55b rises radially outward from one end Dj1 in the axial direction Dj of the first seal portion 55a. 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 formed by bending in a U shape. On the second surface 22b, the second seal portion 55b extends along the remaining three sides, excluding the inner side in the radial direction Dr.

[0053] Figure 7 shows the camera cover 53 as viewed from the axial direction Dj. As shown in Figure 7, the camera cover 53 has a cable housing portion 53d for housing a 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 formed recessed radially outward from the first opposing surface 53a. On the second opposing surface 53b, a cable entry opening 53k is formed at a position opposite the insertion hole 24h in the axial direction Dj, communicating with the end of one side Dj1 of the cable housing portion 53d in the axial direction Dj. The second sealing portion 55b is arranged to surround the insertion hole 24h and the cable entry opening 53k.

[0054] As shown in Figure 3, the camera cover 53 is fixed to the tool body 2 by, for example, two bolts 59. As shown in Figures 4 and 5, a screw hole 22n is formed in the first surface 22a of the head portion 22 at a predetermined position into which each bolt 59 is screwed. As shown in Figure 4, each bolt 59 integrally comprises a screw shaft portion 59a and a screw head 59b. The screw shaft portion 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 shaft portion 59a. The screw head 59b is formed to be larger in diameter than the screw shaft portion 59a. The seating surface 59z of the screw head 59b is tapered so that its diameter gradually increases along the direction in which the screw shaft portion 59a extends from the screw shaft portion 59a.

[0055] As shown in Figures 4 and 6, the bolt insertion hole 53h formed in the camera cover 53 has a tapered inclined surface 53s formed so that the diameter of the hole gradually increases from the inside to the outside in the radial direction Dr. When the threaded shaft portion 59a of the bolt 59 is screwed into the threaded hole 22n through the bolt insertion hole 53h, the seating surface 59z of the threaded head 59b comes into contact with the inclined surface 53s. When the bolt 59 is tightened with a predetermined torque, the seating surface 59z and the inclined surface 53s come into contact, fixing the camera cover 53 in a predetermined position.

[0056] When fastening the bolt 59, first, the first opposing surface 53a of the camera cover 53 is placed on the first sealing portion 55a of the sealing member 55 which is aligned with the first surface 22a, and the second opposing surface 53b is aligned with the second sealing 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 by an axial distance Dj equal to the thickness of the second sealing portion 55b. When the bolt 59 is tightened, the seating surface 59z presses the inclined surface 53s inward in the radial direction Dr, causing the first opposing surface 53a and the first surface 22a to come into close contact and the first sealing portion 55a to be crushed. Furthermore, when the bolt 59 is fully fastened and the seating surface 59z abuts against the inclined surface 53s, the camera cover 53's second opposing surface 53b and the second surface 22b come into close contact and the second sealing portion 55b is crushed. In other words, as the bolt 59 is tightened, the seating surface 59z comes into contact with the inclined surface 53s, causing the camera cover 53 to be displaced to one side Dj1 in the axial direction Dj, and the second opposing surface 53b is pressed toward the second surface 22b, thereby crushing the second seal portion 55b. In this way, the camera cover 53 can be attached to the tool body 2 by simply tightening the bolt 59 along the radial direction Dr, pressing it 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 enhanced.

[0057] 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 a first opposing surface 53a facing the housing recess 25 side and the outer peripheral surface 53f of the camera cover 53 facing the opposite side of the first opposing surface 53a (outside in the radial direction Dr). The lens portion 51p is positioned inside the camera opening 54 and takes images through the camera opening 54.

[0058] As shown in Figure 6, the camera opening 54 has an opening inclined surface 54s that is tapered, with the diameter of the camera opening 54 gradually increasing from the inner housing recess 25 side in the radial direction Dr towards the outer peripheral surface 53f of the cover on the radial direction Dr. In this embodiment, the opening inclined surface 54s is formed continuously around the entire circumference of the camera opening 54. However, it is sufficient that the opening inclined surface 54s is formed around at least a portion of the camera opening 54. In the operating state of the turning tool 1, it is sufficient that at least the opening inclined surface 54s is formed at the lower side of the camera opening 54. This makes it easier for the coolant (cutting oil) supplied around the cutting insert 4 to flow out of the camera opening 54 if it enters the camera opening 54 during cutting.

[0059] As shown in Figure 4, the camera seal member 57 is sandwiched between the lens portion 51p of the camera 51 and the outer circumference 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 intrusion of coolant from the camera opening 54 into the camera cover 53 is suppressed.

[0060] As shown in Figure 6, the camera cover 53 is provided with a cover-side recess 53c for accommodating the camera sealing member 57. By accommodating the camera sealing member 57 in the cover-side recess 53c, misalignment of the camera sealing member 57 and the camera 51 is suppressed.

[0061] As shown in Figure 2, the illumination device 6 is mounted on the tool body 2 and illuminates the workpiece surface 100f, which is photographed by the camera 51. As shown in Figures 3 and 4, the illumination device 6 is positioned 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 positioned between the distance sensors 31 and 32 of the sensor device 3 and the illumination device 6 in the axial direction Dj. The illumination device 6 comprises a light source 61 and a cover member 62.

[0062] The light source 61 is, for example, a light-emitting element such as an LED. As shown in Figure 5, the light source 61 is positioned on the third surface 22c of the head portion 22, facing 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 at a step in the radial direction Dr from the first surface 22a.

[0063] As shown in Figure 3, the cover member 62 is fixed to the third surface 22c of the tool body 2 by bolts 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 it between itself and the head portion 22.

[0064] The cover member 62 has an opening 63 through which illumination light from the light source 61 passes. The opening 63 penetrates in a direction connecting the back surface 62b of the cover member 62, which faces the light source 61, and the front surface 62f of the cover, which faces the opposite side of the light source 61. In this embodiment, the opening 63 is a slit 63s. The slit 63s is formed extending along the axial direction Dj. The opening 63 may be a hole instead of a slit 63s. The slit 63s is formed such that its position in the circumferential direction around the tool axis J coincides with that of the camera 51. When viewed from the axial direction Dj, the slit 63s is formed in a tapered shape, with the opening dimensions gradually increasing from the back surface 62b side to the front surface 62f side of the cover.

[0065] Illumination light from the light source 61 is irradiated through the aperture 63 onto the outer machined surface 100f in the radial direction Dr. The slit 63s is formed in a tapered shape when viewed from the axial direction Dj, The illumination light passing through the slit 63s is diffused radially. As a result, the illumination light irradiates a wider area of ​​the processed surface 100f.

[0066] Furthermore, the cover member 62 has a camera-side opening 64 at one end of the axial direction Dj1. The camera-side opening 64 opens toward one end of the axial direction Dj1. 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 is irradiated towards the camera 51 side of the axial direction Dj1 through the camera-side opening 64. Here, as shown in Figures 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 is inclined radially outward in the axial direction Dj, from the illumination device 6 side toward the lens portion 51p side (camera opening 54 side) of the camera 51. This prevents the illumination light from the illumination device 6 from being blocked by the camera cover 53.

[0067] [Effects of this embodiment] The turning tool of this embodiment described above includes a sealing member 55 that is sandwiched between the camera cover 53 and the tool body 2 and seals the outer periphery of the housing recess 25. The sealing member 55 is sandwiched between the first surface 22a and the second surface 22b of the tool body 2, which are formed to surround the outer periphery of the housing recess 25 and rise radially outward from the first surface 22a, and the first opposing surface 53a and the second opposing surface 53b of the camera cover 53. As a result, the sealing performance between the first surface 22a and the second surface 22b of the tool body 2, which are bent in an L-shape rather than being flat, and the first opposing surface 53a and the second opposing surface 53b of the camera cover 53 can be improved by the sealing member 55. Therefore, it is possible to prevent liquid coolant used during cutting from reaching the camera 51 housed in the housing recess 25 of the tool body 2, which is covered by the camera cover 53. As a result, the sealing performance in the part of the tool body 2 where the camera 51 is housed is improved, making it possible to suppress the effects of coolant on the camera 51.

[0068] In this embodiment, the tool body 2 also has a sensor support portion 24. The sensor support portion 24 has a sensor support surface 24f on one side Dj1 in the axial direction Dj. This allows the distance sensors 31 and 32, which are attached to the tip of the tool body 2, to be supported by the sensor support portion 24. The sensor support portion 24 has a second surface 22b on the other side Dj2 in the axial direction Dj, which faces the second opposing surface 53b of the camera cover 53. This improves the sealing performance between the sensor support portion 24, which supports the distance sensors 31 and 32, and the camera cover 53, which covers the camera 51, when distance sensors 31 and 32 are provided.

[0069] In this embodiment, the sensor support portion 24 has an insertion hole 24h through which the sensor cable 35, led out from the distance sensors 31 and 32, is inserted. The camera cover 53 has an opening at the second opposing surface 53b where the end of a cable housing portion 53d, which accommodates the sensor cable 35 extending from the insertion hole 24h to the other side Dj2 in the axial direction Dj, is located. The second sealing portion 55b is positioned to surround the insertion hole 24h and the end of the cable housing portion 53d. This improves the sealing performance between the sensor support portion 24 and the camera cover 53 when the sensor cable 35 is arranged to span between the sensor support portion 24 and the camera cover 53.

[0070] In this embodiment, the bolt 59 that secures the camera cover 53 to the tool body 2 has a tapered seating surface 59z. The camera cover 53 has an inclined surface 53s in the bolt insertion hole 53h. As a result, when the threaded shaft portion 59a of the bolt 59 is screwed into the threaded hole 22n formed in the first surface 22a of the tool body 2, the seating surface 59z of the bolt 59 comes into contact with the inclined surface 53s, displacing the camera cover 53 to one side Dj1 in the axial direction Dj and pressing the second opposing surface 53b toward the second surface 22b. This allows the sealing member 55 to adhere more tightly to the second surface 22b of the sensor support portion 24 and the second opposing surface 53b of the camera cover 53. Therefore, by simply tightening the bolt 59 that secures the camera cover 53 to the first surface 22a of the tool body 2, the sealing performance between the sensor support portion 24 and the camera cover 53 can also be improved.

[0071] Furthermore, this embodiment includes a camera 51 as an electronic component. This allows the machined surface 100f to be photographed even if it is the inner diameter surface of the workpiece 100. As a result, the condition of the machined surface 100f of the workpiece 100 can be observed clearly.

[0072] In this embodiment, the camera cover 53 has a camera opening 54 positioned opposite the lens portion 51p of the camera 51. This allows the camera 51 to photograph the processed surface 100f through the camera opening 54. A camera sealing member 57 and a transparent plate-shaped lens protection cover 51c are sandwiched between the lens portion 51p of the camera 51 and the camera opening 54 of the camera cover 53. This allows the camera sealing member 57 to enhance the sealing performance between the camera opening 54 of the camera cover 53 and the lens portion 51p of the camera 51. In addition, the lens protection cover 51c prevents the lens portion 51p from being exposed through the camera opening 54 and protects the lens portion 51p. Furthermore, because the lens protection cover 51c is plate-shaped, it is difficult for a gap to form between it and the camera sealing member 57, thereby enhancing the sealing performance between the camera opening 54 of the camera cover 53 and the lens portion 51p of the camera 51.

[0073] In this embodiment, the camera cover 53 also includes a cover-side recess 53c that accommodates the camera sealing member 57 and the lens portion 51p. This allows the camera cover 53 to hold the camera sealing member 57 and the lens portion 51p of the camera 51, thereby suppressing movement in the axial direction Dj, etc.

[0074] In this embodiment, the camera 51 is positioned to capture images of the radially outer surface Dr of the tool body 2. This allows the machined surface 100f to be captured even if it is the inner diameter surface of the workpiece 100.

[0075] In this embodiment, the base 23d to which the cutting insert 4 is attached and the camera 51 are positioned on opposite sides in the radial direction Dr with respect to the tool axis J. This prevents chips generated by cutting the workpiece 100 with the cutting insert 4 from reaching the camera 51. Therefore, it is possible to prevent chips from interfering with the camera 51's imaging and from damaging the camera 51.

[0076] In this embodiment, the camera 51 is positioned on the other side Dj2 in the axial direction Dj relative to the cutting insert 4. This allows the machined surface 100f to be photographed while suppressing chips generated by the cutting process by the cutting insert 4 from reaching the camera 51. Furthermore, if the camera 51 is positioned at the same location in the axial direction Dj relative to the cutting insert 4, the machined surface 100f cut by the cutting insert 4 can be photographed from a closer position.

[0077] In this embodiment, a lighting device 6 is provided on the tool body 2. This allows the state of the machined surface 100f, which is photographed by the camera 51, to be photographed more clearly by illuminating it with the lighting device 6. The camera 51 is positioned between the base 23d and the lighting device 6. This allows the machined surface 100f, which is illuminated by the lighting 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 in good condition.

[0078] In the above embodiment, the camera 51 was used as an example of an electronic component, but the invention is not limited to this. For example, the same configuration can be applied to other electronic components such as the sensor device 3 and lighting device 6 provided in the turning tool 1.

[0079] [Other components included in the present invention] Furthermore, the present invention is not limited to the embodiments described above, and without departing from the spirit of the present invention, The configurations (components) described in the above embodiments, modifications, and provisos may be combined, and the configurations can be added, omitted, substituted, or otherwise modified. Furthermore, 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 inserts 6…Lighting equipment 22a...front page 22b…Second side 22n... Screw hole 22s…Tip 23d... Pedestal 24...Sensor support part 24f...Sensor support surface 24h... Through hole 25…Accommodation recess 31, 32... Distance sensors 34, 35... Sensor cable 51…Camera (electronic component) 51p...Lens section 53...Camera cover (electronic component cover) 53a...First opposing surface 53b…Second facing surface 53c... Recess on the cover side 53d... Cable housing section 53f... outer surface of the cover 53h... Bolt insertion hole 53s…Slope surface 54...Camera opening 55...Sealing material 55a...First seal section 55b...Second seal section 57...Camera seal component 59... Bolt 59a...Screw shaft 59b... Screw head 59z...Seat 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 the tool axis and having a base at one end in the axial direction along the tool axis, A cutting insert that is detachably attached to the base, An electronic component is housed in a recess or insertion hole formed in the tool body, The electronic component cover is attached to the tool body and covers the housing recess, the insertion hole, and the electronic component, The system includes an annular sealing member that is sandwiched between the electronic component cover and the tool body and seals the outer periphery of the housing recess, The tool body is A first surface is formed so as to surround the outer periphery of the receiving recess and faces radially outward from the tool body, intersecting with the axial direction, The insertion hole is open, and the second surface rises radially outward from the first surface and faces the other side in the axial direction, The aforementioned electronic component cover is A first opposing surface facing the first surface, It has a second opposing surface that faces the second surface, The sealing member is A first sealing portion extending along the first surface and sandwiched between the first surface and the first opposing surface, It has a second sealing portion that rises radially outward from the first sealing portion and extends along the second surface, and is sandwiched between the second surface and the second opposing surface, The sealing member surrounds the receiving recess and the insertion hole and seals the outer periphery of the receiving recess and the insertion hole. Turning tools.

2. The tool body further includes a distance sensor attached to the tip, The tool body has a sensor support portion formed on the other side in the axial direction relative to the distance sensor, The aforementioned sensor support portion is On one side in the axial direction, there is a sensor support surface that supports the distance sensor facing the one side in the axial direction, The other side in the axial direction has the second surface, The turning tool according to claim 1.

3. The sensor support portion has an opening on the second surface and an insertion hole through which a sensor cable led out from the distance sensor is inserted, The electronic component cover has an opening on the second opposing surface where the end of a cable housing portion is provided for housing the sensor cable extending from the insertion hole to the other side in the axial direction. The second sealing portion is arranged to surround the insertion hole and the end of the cable housing portion. The turning tool according to claim 2.

4. The tool further comprises bolts for securing the electronic component cover to the tool body, The aforementioned bolt is The screw shaft is inserted through the bolt insertion hole formed in the electronic component cover into the screw hole formed on the first surface of the tool body, The screw head has a tapered seating surface whose diameter gradually increases in the direction extending from the screw shaft portion, The electronic component cover has an inclined surface such that the seating surface of the bolt fastened to the screw hole abuts against the bolt insertion hole, thereby displacing the electronic component cover to one side in the axial direction and pressing the second opposing surface toward the second surface. A turning tool according to any one of claims 1 to 3.

5. A tool body extending along a tool axis and having a base at one end in the axial direction along the tool axis, A cutting insert that is detachably attached to the base, An electronic component is housed in a recess formed in the tool body, The tool body is fitted with an electronic component cover that covers the housing recess and the electronic component, The system includes an annular sealing member that is sandwiched between the electronic component cover and the tool body and seals the outer periphery of the housing recess, The tool body is A first surface is formed so as to surround the outer periphery of the receiving recess and faces radially outward from the tool body, intersecting with the axial direction, It has a second surface that rises radially outward from the first surface and faces the other side in the axial direction, The aforementioned electronic component cover is A first opposing surface facing the first surface, It has a second opposing surface that faces the second surface, The sealing member is A first sealing portion extending along the first surface and sandwiched between the first surface and the first opposing surface, It has a second sealing portion that rises radially outward from the first sealing portion and extends along the second surface, and is sandwiched between the second surface and the second opposing surface, The aforementioned electronic component is a camera that photographs the machined surface of the workpiece that has been machined by the cutting insert. Turning tools.

6. The electronic component cover has a camera opening at a position facing the lens portion of the camera, which penetrates in a direction connecting the first opposing surface and the outer peripheral surface of the electronic component cover opposite to the first opposing surface. The camera further comprises an annular camera sealing member sandwiched between the lens portion of the camera and the outer periphery of the camera opening, and a transparent plate-shaped lens protective cover. The turning tool according to claim 5.

7. The electronic component cover has a recess extending from the first opposing surface, and a cover-side recess for housing the camera sealing member and the lens portion. The turning tool according to claim 6.

8. The camera is positioned to capture images of the radially outer side of the tool body intersecting the axial direction. A turning tool according to any one of claims 5 to 7.

9. The base is positioned first with respect to the tool axis in the radial direction of the tool body intersecting the axial direction, The camera is positioned on the second radial side with respect to the tool axis. A turning tool according to any one of claims 5 to 8.

10. The camera is positioned in the same axial position as the cutting insert attached to the base, or on the other side in the axial direction. A turning tool according to any one of claims 5 to 9.

11. The tool body is further equipped with a lighting device that illuminates the workpiece surface, which is photographed by the camera, The camera is positioned in the axial direction between the base and the lighting device. A turning tool according to any one of claims 5 to 10.

Images