Turrets and machine tools

Abstract

To provide a turret-type tool rest capable of surely collecting chips in a tool rest capable of mounting a plurality of tools, and a machine tool equipped with such a tool rest. [Solution] The tool post is made of a cylindrical body centered on the central axis of rotation (110), and has a plurality of mounting portions (61) arranged circumferentially about the central axis of rotation (110), each of which can mount a tool holder. The tool post is equipped with a rotating body (60) that can rotate around the central axis of rotation (110), a plurality of first pipes (310) that are provided on the rotating body (60) and arranged at intervals from each other circumferentially about the central axis of rotation (110) for sucking chips, a second pipe (320) that is provided inside the rotating body (60), and a connection mechanism (90) that selectively connects the second pipe (320) to any of the plurality of first pipes (310).

Description

[Technical Field]

[0001] The present invention relates to a tool post and a machine tool. [Background technology]

[0002] For example, Japanese Utility Model Laid-Open Publication No. 63-169240 (Patent Document 1) discloses a turret tool post for an NC lathe machine tool. The turret tool post includes a pipe that passes through the center of rotation of the turret tool post, a suction nozzle attached to the tip of the pipe, and a vacuum device attached to the end of the pipe.

[0003] In addition, Patent Publication No. 2022-149460 (Patent Document 2) discloses a workpiece processing device that includes a workpiece processing unit that performs specified processing on the workpiece, a chip suction unit that collects chips generated by processing the workpiece by suction, and an articulated robot that moves the chip suction unit to follow the workpiece processing unit when processing the workpiece. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 63-169240 [Patent Document 2] Japanese Patent Publication No. 2022-149460 Summary of the Invention [Problem to be solved by the invention]

[0005] Since the cutting edge position, cutting edge shape, and the relative position of the cutting edge between the workpiece and the workpiece vary depending on the type of tool, the direction in which chips are discharged from the workpiece and the shape of the chips (such as chips or lines) change each time the tool used to machine the workpiece on the turret-type tool post is changed. However, in the above-mentioned Patent Document 1, a single suction nozzle is used regardless of the type of tool, which may result in insufficient collection of chips.

[0006] An object of the present invention is to provide a turret-type tool post that can mount multiple tools and that can reliably collect chips, and a machine tool equipped with such a tool post. [Means for solving the problem]

[0007] According to one aspect of the present invention, there is provided a tool post comprising: a rotating body that is rotatable about the central axis of rotation and that has a plurality of mounting portions arranged circumferentially about a predetermined central axis of rotation, each mounting portion capable of mounting a tool holder; a plurality of first pipes that are provided on the rotating body and spaced apart from one another circumferentially about the central axis of rotation, for suctioning chips; a second pipe that is provided inside the rotating body; and a connection mechanism that selectively connects the second pipe to any of the plurality of first pipes.

[0008] A machine tool according to the present invention includes the above tool post. According to another aspect of the present invention, a tool rest includes: a rotating body that is a cylindrical body centered on the central axis of rotation and that can rotate about the central axis of rotation, and that has a plurality of mounting portions arranged circumferentially about the central axis of rotation, each mounting portion capable of mounting a tool holder; and a first pipe that is provided on the rotating body and that serves to suction chips. The rotating body further has a cylindrical portion that protrudes from the mounting portions in the axial direction of the central axis of rotation and extends around the central axis of rotation. The first pipe is provided in the cylindrical portion and includes a first hole that opens to the outer circumferential surface of the cylindrical portion. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a turret-type tool post that can mount multiple tools and that can reliably collect chips, and a machine tool equipped with such a tool post. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a machine tool equipped with a tool post according to an embodiment of the present invention; [Figure 2] FIG. 2 is a front view showing the machine tool in FIG. [Figure 3] FIG. 3 is a side view showing the machine tool as viewed in the direction indicated by arrow III in FIG. 2. [Figure 4] FIG. [Figure 5] 5 is a cross-sectional view showing the tool rest as seen in the direction of the arrows on line VV in FIG. 4. [Figure 6] 6 is a cross-sectional view showing the tool rest as seen in the direction of the arrows on line VI-VI in FIG. 4. [Figure 7] 7 is a cross-sectional view showing the tool rest (when the first pipe and the second pipe are connected) in the range surrounded by the two-dot chain line VII in FIG. 5. FIG. [Figure 8] 7 is a cross-sectional view showing the tool rest (when the first pipe and the second pipe are not connected) in the range surrounded by the two-dot chain line VII in FIG. 5. FIG. [Figure 9] FIG. 5 is a perspective view showing a flange in FIG. 4. [Figure 10] FIG. 5 is another perspective view showing the flange in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings, in which the same or corresponding elements are designated by the same reference numerals.

[0012] Fig. 1 is a perspective view showing a machine tool equipped with a tool post according to an embodiment of the present invention. Fig. 2 is a front view showing the machine tool in Fig. 1. Fig. 3 is a side view showing the machine tool as viewed in the direction indicated by arrow III in Fig. 2. In the figure, the internal structure of the machine tool is shown by being seen through a cover body that forms the exterior of the machine tool.

[0013] 1 to 3, machine tool 100 is a lathe that machines a workpiece by bringing a tool into contact with the rotating workpiece. Machine tool 100 is an NC (Numerically Controlled) machine tool in which various operations for machining the workpiece are automated by numerical control using a computer.

[0014] First, the structure of machine tool 100 will be described. Machine tool 100 has a bed (not shown), workpiece spindle 21, and tool rest 50. The bed is a base member for supporting workpiece spindle 21, tool rest 50, etc., and is installed on the floor of a factory or the like. The bed is made of metal such as cast iron. The bed is a slant bed type, and the support surface that supports workpiece spindle 21, tool rest 50, etc. is inclined.

[0015] The work spindle 21 is capable of holding a workpiece W. As an example, the workpiece W is made of resin. The workpiece W may also be made of metal.

[0016] More specifically, the workpiece spindle 21 has a plurality of chucks 22. The plurality of chucks 22 are provided at intervals from one another in the circumferential direction of the rotation center axis 101. Each chuck 22 is slidable in the radial direction of the rotation center axis 101. The plurality of chucks 22 grip the outer peripheral surface of the workpiece W by sliding each chuck 22 radially inwardly of the rotation center axis 101, and grip the inner peripheral surface of the cylindrical workpiece W by sliding each chuck 22 radially outwardly of the rotation center axis 101.

[0017] The workpiece spindle 21 rotates the workpiece W around a central rotation axis 101 that is parallel to the Z-axis extending horizontally. The workpiece spindle 21 is fixed to the bed. The workpiece spindle 21 may be movable in the Z-axis direction by various feed mechanisms, guide mechanisms, servo motors, etc.

[0018] Tool rest 50 is provided in machining area 160 of machine tool 100. Machining area 160 is a space where workpiece machining is performed, and is sealed by a cover (not shown) to prevent foreign matter such as chips or coolant generated during workpiece machining from leaking outside machining area 160.

[0019] The tool rest 50 is a turret-type tool rest that can accommodate multiple tools. The tool rest 50 moves the multiple tools in the circumferential direction of a rotation center axis 110 that is parallel to the Z axis, thereby indexing the tools used for machining to a predetermined angular position (hereinafter also referred to as the "workpiece machining position") centered on the rotation center axis 110. The tool rest 50 has a milling function that machines the workpiece W by bringing a rotating tool into contact with the stationary workpiece W.

[0020] Machine tool 100 further has a saddle 31. Saddle 31 is attached to the bed. Saddle 31 is movable in the Z-axis direction by various feed mechanisms, guide mechanisms, servo motors, and the like.

[0021] Machine tool 100 further includes a cross slide 32 and a base 33. Cross slide 32 is attached to saddle 31. Cross slide 32 is movable in the X-axis direction, which is perpendicular to the Z-axis and inclined relative to the vertical and horizontal directions, by various feed mechanisms, guide mechanisms, servo motors, etc. Base 33 is attached to cross slide 32. Base 33 is movable in the Y'-axis direction, which is perpendicular to the Z-axis and inclined relative to the X-axis, by various feed mechanisms, guide mechanisms, servo motors, etc. Base 33 is movable in the Y-axis direction, which is perpendicular to the X-axis and Z-axis, by interlocking the movement of cross slide 32 in the X-axis direction with the movement of base 33 in the Y'-axis direction.

[0022] The tool rest 50 is attached to the base 33. In this configuration, the tool rest 50 is movable in the X-axis direction, the Y-axis direction, and the Z-axis direction.

[0023] Next, the structure of the tool rest 50 in this embodiment will be specifically described. Fig. 4 is a front view showing the tool rest. Fig. 5 is a cross-sectional view showing the tool rest as seen in the direction of the arrows on line VV in Fig. 4. Fig. 6 is a cross-sectional view showing the tool rest as seen in the direction of the arrows on line VI-VI in Fig. 4.

[0024] 1 to 6, the tool rest 50 has a tool rest base 76. The tool rest base 76 is attached to the base 33.

[0025] The tool post 50 further has a rotating body (turret) 60. The rotating body 60 has a cylindrical shape centered on a central axis of rotation 110. The rotating body 60 protrudes from the tool post base 76 in the axial direction of the central axis of rotation 110. The rotating body 60 is supported by the tool post base 76 via bearings (not shown). The rotating body 60 rotates about the central axis of rotation 110 by transmitting rotation from a motor (not shown) mounted on the tool post base 76. The central axis of rotation 110 is an imaginary straight line extending through the center of rotation of the rotating body 60. The central axis of rotation 110 extends parallel to the central axis of rotation 101 of the workpiece spindle 21.

[0026] The tool post 50 further includes a built-in motor 231. The built-in motor 231 is a milling motor for rotating a tool held by a tool holder 71 (described later), and is provided inside the rotating body 60. The built-in motor 231 is capable of outputting rotation about a rotation center axis 140. The rotation center axis 140 is perpendicular to the rotation center axis 110.

[0027] The built-in motor 231 has a motor housing 232 and a rotor 233. The motor housing 232 consists of a cylindrical body centered on the rotation central axis 140. The motor housing 232 is attached to the tool post base 76. The motor housing 232 is a fixed part that does not rotate with the rotating body 60. The rotor 233 consists of a shaft body centered on the rotation central axis 140. The rotor 233 is arranged inside the motor housing 232. The rotor 233 is supported by the motor housing 232 so as to be rotatable around the rotation central axis 140.

[0028] The revolving unit 60 has a plurality of mounting parts 61. As an example, the revolving unit 60 has 12 mounting parts 61. The mounting parts 61 are lined up in the circumferential direction of the revolving central axis 110. The mounting parts 61 are lined up at equal intervals in the circumferential direction of the revolving central axis 110. The mounting parts 61 form a ring shape centered on the revolving central axis 110. The built-in motor 231 is arranged inside the mounting parts 61.

[0029] A tool holder 71 can be attached to the attachment portion 61. The tool holder 71 can hold a tool. The tool holder 71 is fastened to the attachment portion 61 using bolts or the like.

[0030] In the figure, a tool holder 71 for holding a fixed tool T is shown as a representative example. The fixed tool T is a tool that does not rotate when machining a workpiece, such as an external diameter cutting tool, an internal diameter cutting tool, or a grooving tool. The tool holder 71 is indexed to the workpiece machining position. A lid 72 is attached to the mounting portion 61 to which the tool holder 71 is not attached.

[0031] A tool holder for holding a rotating tool can also be attached to the mounting portion 61. The rotating tool is a tool that rotates when machining a workpiece, such as a drill or reamer. In this case, the tool holder has a built-in rotation transmission mechanism for transmitting the rotation output from the built-in motor 231 to the rotating tool. When the tool holder holding the rotating tool is indexed to the workpiece machining position, the rotor 233 of the built-in motor 231 is connected to the rotation transmission mechanism built into the tool holder.

[0032] 4 and 5, each of the mounting portions 61 has a plurality of mounting surfaces 61a. The mounting surfaces 61a are flat surfaces perpendicular to the radial direction of the central axis of rotation 110. The mounting surfaces 61a correspond to a plurality of side surfaces of a regular polygonal prism (a regular dodecagon in this embodiment) corresponding to the number of the mounting portions 61. A tool holder 71 for holding a fixed tool T, a tool holder for holding a rotary tool, or a lid 72 is attached to the mounting surface 61a.

[0033] The multiple mounting portions 61 further have end faces 61b. The end faces 61b are flat faces that are perpendicular to the axial direction of the central pivot shaft 110. The outer periphery of the end faces 61b is continuous with the multiple mounting faces 61a.

[0034] The rotating body 60 further has a cylindrical portion 66. The cylindrical portion 66 extends around the central axis of rotation 110. The cylindrical portion 66 has a cylindrical shape centered on the central axis of rotation 110. The cylindrical portion 66 protrudes from the multiple mounting portions 61 in the axial direction of the central axis of rotation 110. The cylindrical portion 66 is disposed on the opposite side of the tool post base 76 in the axial direction of the central axis of rotation 110, with the multiple mounting portions 61 sandwiched between them.

[0035] The cylindrical portion 66 has an outer peripheral surface 66a. The radius of the outer peripheral surface 66a, which is centered on the central axis of rotation 110, is smaller than the distance between the central axis of rotation 110 and the mounting surface 61a in the radial direction of the central axis of rotation 110. The inner peripheral edge of the end face 61b is continuous with the outer peripheral surface 66a. The outer peripheral surface 66a forms a step with the mounting surface 61a in the radial direction of the central axis of rotation 110.

[0036] The tool post 50 further has a cover 67. The cover 67 is detachably attached to the rotating body 60. The cover 67 is fastened to the rotating body 60 using bolts or the like. The cover 67 is attached to one end (front end) of the cylindrical portion 66 in the axial direction of the rotating central axis 110. The cover 67 has a disk shape in which the axial direction of the rotating central axis 110 corresponds to the thickness direction. The cover 67 is provided so as to close an opening defined in one end (front end) of the cylindrical portion 66. The cover 67 is a movable part that rotates integrally with the rotating body 60.

[0037] The tool post 50 further has a flange 81. The flange 81 is provided inside the rotating body 60. The flange 81 is arranged inside the cylindrical portion 66. The flange 81 is attached to the motor housing 232. The flange 81 is attached to one end (front end) of the motor housing 232 in the axial direction of the rotating central shaft 110. The other end (rear end) of the motor housing 232 in the axial direction of the rotating central shaft 110 is attached to the tool post base 76. The flange 81 is a fixed component that does not rotate together with the rotating body 60. The structure of the flange 81 will be described in detail later.

[0038] 4 and 5, the tool rest 50 further includes a plurality of first pipes 310 (310A, 310B, 310C, 310D). The plurality of first pipes 310 are pipes for sucking chips generated during machining of a workpiece. The plurality of first pipes 310 form flow paths through which suction air and chips can flow. The first pipes 310A, 310B, 310C, and 310D are preferably used for sucking chips from tools held in tool holders at the mounting portions 61A, 61B, 61C, and 61D in FIG. 4, respectively.

[0039] The multiple first pipes 310 are provided on the revolving body 60. The multiple first pipes 310 are arranged at intervals from one another in the circumferential direction of the revolving central axis 110. The multiple first pipes 310 are arranged at equal intervals in the circumferential direction of the revolving central axis 110. The multiple first pipes 310 may also be arranged at unequal intervals in the circumferential direction of the revolving central axis 110. The multiple first pipes 310 are movable parts that revolve integrally with the revolving body 60. The multiple first pipes 310 move in the circumferential direction of the revolving central axis 110 as the revolving body 60 revolves.

[0040] At least one first pipe 310 (first pipe 310A) of the plurality of first pipes 310 includes a flexible nozzle 211. The flexible nozzle 211 has an opening 216. The opening 216 is open to the processing area 160.

[0041] The flexible nozzle 211 is deformable so that the position and orientation of the opening 216 can be changed, and is also capable of retaining the shape after deformation.

[0042] More specifically, the flexible nozzle 211 has a pipe member 212 and a nozzle tip 213. The pipe member 212 is connected to the rotating body 60 (cylindrical portion 66). The pipe member 212 is connected to the outer peripheral surface 66a of the cylindrical portion 66. The pipe member 212 is made up of a plurality of cylinders connected in series, and adjacent cylinders are connected to each other so as to be able to rotate. The nozzle tip 213 is provided at the tip of the flexible nozzle 211. The nozzle tip 213 is attached to the tip of the pipe member 212. The nozzle tip 213 has an opening 216. The nozzle tip 213 has a funnel shape in which the flow path area increases toward the opening 216.

[0043] The flexible nozzle 211 is made of metal, but may also be made of resin.

[0044] The plurality of first pipes 310 each include a plurality of first holes 241. The first holes 241 are provided in the cylindrical portion 66. The first holes 241 open to an outer peripheral surface 66a of the cylindrical portion 66. The first holes 241 penetrate the cylindrical portion 66 in the radial direction of the central axis of rotation 110. The plurality of first holes 241 open to the outer peripheral surface 66a of the cylindrical portion 66 at angular positions spaced apart from one another in the circumferential direction of the central axis of rotation 110. The first holes 241 open to the outer peripheral surface 66a of the cylindrical portion 66 at angular positions corresponding to the boundary between an attachment portion 61 and an attachment portion 61 adjacent to that attachment portion 61 in the circumferential direction of the central axis of rotation 110.

[0045] The flexible nozzle 211 is connected to the outer peripheral surface 66a of the cylindrical portion 66, thereby allowing the first hole 241 and the flexible nozzle 211 to communicate with each other. As shown in FIG. 4, the flexible nozzle 211 extends from the outer peripheral surface 66a of the cylindrical portion 66 through a space facing the end face 61b in the axial direction of the rotation central axis 110 and radially outward from the rotation central axis 110. The stationary tool T has a cutting edge ta that comes into contact with the workpiece W. The opening 216 opens facing the cutting edge ta. The opening 216 is positioned below the cutting edge ta. The opening 216 opens obliquely upward. The opening 216 and the cutting edge ta are aligned along the circumferential direction of the rotation central axis 101. The opening 216 and the cutting edge ta are aligned in the listed order in the direction of rotation of the workpiece W around the rotation central axis 101.

[0046] In each of the first pipes 310, the first pipes 310B, 310C, and 310D, a lid 221 for closing the opening of the first hole 241 is attached to the outer circumferential surface 66a of the cylindrical portion 66.

[0047] Although only one tool holder 71 is shown in the figure for simplicity, a larger number of tool holders may be attached to the tool rest 50. In this case, any one of the first pipes 310B, 310C, and 310D may also be provided with a flexible nozzle 211. Each flexible nozzle 211 has a shape suitable for suctioning chips from a corresponding tool, and the position and orientation of the opening 216 are adjusted by deforming the tubular member 212. The length of the tubular member 212 and / or the shape of the nozzle tip 213 may differ among the multiple flexible nozzles 211.

[0048] The tool post 50 may have a number other than four of the first pipes 310. The number of first pipes 310 provided in the tool post 50 may be the same as the number of the mounting parts 61, may be less than the number of the mounting parts 61, or may be more than the number of the mounting parts 61.

[0049] The tool rest 50 further includes a second pipe 320. The second pipe 320 is a pipe for collecting chips from the first pipe 310. The second pipe 320 forms a flow path through which suction air and chips can flow.

[0050] The second piping 320 is provided inside the rotating body 60. The second piping 320 is provided inside the rotating body 60, which is made of a cylindrical body centered on the central axis of rotation 110. The second piping 320 is a fixed component that does not rotate together with the rotating body 60. The second piping 320 does not move in the circumferential direction of the central axis of rotation 110 as the rotating body 60 rotates. The position of the second piping 320 is fixed regardless of the rotation of the rotating body 60.

[0051] Fig. 7 is a cross-sectional view showing the tool rest (when the first pipe and the second pipe are connected) in the range surrounded by the two-dot chain line VII in Fig. 5. Fig. 8 is a cross-sectional view showing the tool rest (when the first pipe and the second pipe are not connected) in the range surrounded by the two-dot chain line VII in Fig. 5.

[0052] 7 and 8, the tool post 50 further includes a connection mechanism 90. The connection mechanism 90 selectively connects the second pipe 320 to one of the plurality of first pipes 310 (310A, 310B, 310C, 310D). The connection mechanism 90 connects the second pipe 320 to the first pipe 310 adjacent to the tool holder 71 indexed to the workpiece machining position in the circumferential direction of the rotation central axis 110.

[0053] The connection mechanism 90 has a piston 91 and a first protrusion 83, which will be described later. The piston 91 is disposed inside the rotating body 60. The piston 91 is disposed inside the cylindrical portion 66. A second hole 242 is provided in the piston 91.

[0054] The piston 91 is made of a cylindrical body centered on a piston central axis 150. The piston central axis 150 extends in the radial direction of the rotation central axis 110. The piston 91 is supported by a first protrusion 83 so as to be slidable in the axial direction of the piston central axis 150. As will be described later, the first protrusion 83 is a part of the flange 81.

[0055] The piston 91 has a tip end 92 and a base end 93. The tip end 92 and the base end 93 are aligned in the axial direction of the piston central axis 150. The tip end 92 and the base end 93 are connected to each other by a connecting pin 96. The tip end 92 faces the cylindrical portion 66 in the axial direction of the piston central axis 150. The base end 93 is disposed on the opposite side of the tip end 92 from the cylindrical portion 66 in the axial direction of the piston central axis 150. The base end 93 is supported by the first protrusion 83.

[0056] The second hole 242 extends linearly around the piston central axis 150. The second hole 242 extends in the axial direction of the piston central axis 150 and penetrates the piston 91 (the tip end portion 92 and the base end portion 93). The second hole 242 opens opposite the first hole 241 in the axial direction of the piston central axis 150. The second hole 242 communicates with the second pipe 320 (a third hole 243, which will be described later) inside the first protruding portion 83.

[0057] The piston 91 is provided with a seal member 97. The tip end portion 92 is provided with a seal groove 92h. The seal groove 92h has a depth direction corresponding to the axial direction of the piston central axis 150, and extends annularly around the piston central axis 150 while forming a groove shape that opens facing the cylindrical portion 66. The second hole 242 opens into the tip end portion 92 at a position surrounded by the seal groove 92h. The seal member 97 has a ring shape centered on the piston central axis 150. The seal member 97 is disposed in the seal groove 92h.

[0058] The piston 91 (base end 93) has a flange 91m. The flange 91m widens radially outward from the piston central axis 150 in a flange-like shape. The piston 91 and the first protrusion 83 define a first air chamber 95p and a second air chamber 95q. The first air chamber 95p and the second air chamber 95q are located in front of and behind the flange 91m in the axial direction of the piston central axis 150.

[0059] The piston 91 can slide between a first position Pa (the position of the piston 91 shown in Figure 7) in which the piston 91 abuts against the rotating body 60 and connects the second piping 320 to the first piping 310 via the second hole 242, and a second position Pb (the position of the piston 91 shown in Figure 8) in which the piston 91 is separated from the rotating body 60.

[0060] 7, when air is supplied to the second air chamber 95q, the piston 91 slides radially outward about the central axis of rotation 110. The seal member 97 of the piston 91 abuts against the inner circumferential surface of the cylindrical portion 66, and the first hole 241 and the second hole 242 communicate with each other. The seal member 97 seals the gap between the tip end portion 92 and the cylindrical portion 66 in the radial direction of the central axis of rotation 110. With this configuration, the first pipe 310 and the second pipe 320 are connected to each other via the second hole 242.

[0061] 8, when air is supplied to the first air chamber 95p, the piston 91 slides radially inward about the rotation center axis 110. As the piston 91 moves away from the cylindrical portion 66, the seal member 97 of the piston 91 moves away from the inner circumferential surface of the cylindrical portion 66, and the second hole 242 is positioned away from the first hole 241. With this configuration, the first pipe 310 and the second pipe 320 are disconnected.

[0062] When a specific tool holder holding a tool used in workpiece machining is indexed to a workpiece machining position, air is first supplied to the first air chamber 95p to slide the piston 91 radially inward about the swivel center axis 110 and position it at the second position Pb shown in FIG. 8 . Next, the rotating unit 60 is rotated about the swivel center axis 110. In this case, the piston 91 is spaced apart from the cylindrical portion 66, allowing the rotating unit 60 to rotate. Once the specific tool holder is indexed to the workpiece machining position, air is supplied to the second air chamber 95q to slide the piston 91 radially outward about the swivel center axis 110 and position it at the first position Pa shown in FIG. 7 . In this case, the first pipe 310 is connected to the second pipe 320 via the second hole 242, allowing chips to be sucked through the first pipe 310 and the second pipe 320.

[0063] The structure of the connection mechanism in the present invention is not particularly limited. For example, fluid force other than air pressure may be used to move the piston back and forth relative to the rotating body, or spring force may be used.

[0064] 9 and 10 are perspective views showing the flange in Fig. 4. Referring to Fig. 5 to Fig. 10, tool post 50 further has a flange 81. Flange 81 is provided on the inside of revolving body 60. Flange 81 is made of a shaped body formed by additive manufacturing (AM).

[0065] The flange 81 is made of metal, for example, stainless steel. As an example, additive processing applied to form the flange 81 is a powder bed method in which metal powder is spread on a table and a laser is irradiated onto the spread powder to melt and solidify the required portions. The flange 81 may also be made of resin.

[0066] The flange 81 is disposed inside the cylindrical portion 66. The flange 81 is attached to the motor housing 232. The flange 81 is a fixed component that does not rotate together with the rotating body 60.

[0067] The flange 81 has a disk portion 82. The disk portion 82 has a disk shape centered on the pivot axis 110, with the pivot axis 110 corresponding to the thickness direction. The disk portion 82 has a first surface 82a and a second surface 82b. When viewed in the axial direction of the pivot axis 110, the first surface 82a has a circular shape centered on the pivot axis 110. The second surface 82b is disposed on the back side of the first surface 82a. When viewed in the axial direction of the pivot axis 110, the second surface 82b has a circular shape centered on the pivot axis 110.

[0068] The disk portion 82 is fitted inside the cylindrical portion 66. The cylindrical portion 66 is supported by the disk portion 82 so as to be rotatable about a central pivot axis 110.

[0069] A first internal space 120 and a second internal space 130 are formed inside the revolving body 60. A built-in motor 231 and a second protrusion 84 (described later) are disposed in the first internal space 120. A first protrusion 83 (described later) is disposed in the second internal space 130. The first surface 82a faces the cover 67 in the axial direction of the revolving central shaft 110. The first surface 82a is disposed in the second internal space 130. The second surface 82b faces the built-in motor 231 in the axial direction of the revolving central shaft 110. The second surface 82b is disposed in the first internal space 120. The disk portion 82 forms a wall that separates the first internal space 120 and the second internal space 130.

[0070] A seal groove 66h is provided in the cylindrical portion 66. The depth direction of the seal groove 66h is the radial direction of the pivot axis 110, and the seal groove 66h extends annularly around the pivot axis 110, forming a groove shape that opens onto the inner circumferential surface of the cylindrical portion 66. The tool post 50 further includes a seal member 88. The seal member 88 is interposed between the cylindrical portion 66 and the disk portion 82. The seal member 88 has a ring shape centered on the pivot axis 110. The seal member 88 is disposed in the seal groove 66h. The seal member 88 has a lip portion that abuts against the outer circumferential surface of the disk portion 82. The seal member 88 seals the gap between the cylindrical portion 66 and the disk portion 82 in the radial direction of the pivot axis 110.

[0071] The second pipe 320 further includes a third hole 243. The third hole 243 is provided in the flange 81.

[0072] The flange 81 further has a first protrusion 83 and a second protrusion 84. The first protrusion 83 protrudes from the first surface 82a. The first protrusion 83 extends on the first surface 82a while changing direction within a plane perpendicular to the pivot axis 110. The first protrusion 83 extends in a first direction from the peripheral region of the first surface 82a toward the central region, and further extends in a second direction different from the first direction, from the central region of the first surface 82a toward the peripheral region. The first direction is a direction parallel to the radial direction of the pivot axis 110. The second protrusion 84 protrudes from the second surface 82b. The second protrusion 84 extends from the second surface 82b in the axial direction of the pivot axis 110.

[0073] The flange 81 is provided with a piston arrangement hole 86, a third hole 243, and a piping connection port 87. The piston arrangement hole 86 is provided in the first protruding portion 83. The piston arrangement hole 86 opens toward the outside in the radial direction of the swivel central axis 110. The piston arrangement hole 86 opens to the second internal space 130. The piston arrangement hole 86 extends in the radial direction of the swivel central axis 110. A piston 91 is arranged in the piston arrangement hole 86.

[0074] The piping connection port 87 is provided in the second protrusion 84. The piping connection port 87 opens toward the axial direction of the swivel center axis 110. The piping connection port 87 opens in the first internal space 120. The piping connection port 87 opens at a position spaced apart from the swivel center axis 110 and radially outward from the swivel center axis 110. The piping connection port 87 extends in the axial direction of the swivel center axis 110. A pipe member 315, which will be described later, is connected to the piping connection port 87.

[0075] The third hole 243 is provided between the first protruding portion 83, the disk portion 82, and the second protruding portion 84. One end of the third hole 243 is connected to the piston arrangement hole 86, and the other end of the third hole 243 is connected to the piping connection port 87. The one end of the third hole 243 and the other end of the third hole 243 are positioned so as to be shifted from each other in the axial direction of the swivel center axis 110 and in a plane direction perpendicular to the swivel center axis 110.

[0076] The third hole 243 extends in a three-dimensional space. More specifically, the third hole 243 extends from the piston arrangement hole 86 toward the radially inward direction of the swivel center shaft 110. The third hole 243 curves, changes its extending direction by 90°, and extends toward the radially outward direction of the swivel center shaft 110. The third hole 243 curves, changes its extending direction by another 90°, and penetrates the disk portion 82. The third hole 243 extends in the axial direction of the swivel center shaft 110 and reaches the pipe connection port 87.

[0077] 6, the second piping 320 further includes a pipe member 315. The pipe member 315 is made of a pipe member such as a steel pipe or a hose. The pipe member 315 is disposed in the first internal space 120. The pipe member 315 is connected to the pipe connection port 87. The pipe member 315 communicates with the third hole 243.

[0078] The pipe member 315 is arranged inside the rotating body 60 and the tool post base 76. The pipe member 315 is arranged inside the rotating body 60 and the tool post base 76 in a plane perpendicular to the rotation center axis 140.

[0079] The pipe member 315 is arranged inside the multiple mounting portions 61 at a position spaced apart from the pivot axis 110 radially outward from the pivot axis 110. The pipe member 315 is arranged so as not to intersect with the pivot axis 110 when viewed in the axial direction of the rotation center axis 140. The pipe member 315 extends from the piping connection port 87 in the axial direction of the pivot axis 110, passing through a position spaced apart from the pivot axis 110 radially outward from the pivot axis 110. The pipe member 315 extends along the axial direction of the pivot axis 110, along the outer shape of the motor housing 232, and in the radially inward direction of the pivot axis 110. The pipe member 315 extends inside the tool post base 76 along the pivot axis 110.

[0080] 1 and 3, the tool post 50 further includes a suction device 41. The suction device 41 is capable of sucking chips through the first pipe 310 and the second pipe 320. The suction device 41 generates negative pressure within the device and sucks in air in the machining area 160 through the first pipe 310 and the second pipe 320, thereby sucking in chips generated during workpiece machining.

[0081] The suction device 41 is mounted on the tool post 50. The suction device 41 is provided on a path for suctioning chips from the second pipe 320. The suction device 41 is mounted on the tool post base 76. The suction device 41 moves integrally with the tool post 50 in the X-axis direction, the Y-axis direction, and the Z-axis direction.

[0082] To summarize the configuration of the tool post 50 in the embodiment of the present invention described above, the tool post 50 in the present embodiment comprises a rotating body 60 that is a cylindrical body centered on the rotating center axis 110 and that can rotate around the rotating center axis 110, and that has a plurality of mounting portions 61 arranged circumferentially about the rotating center axis 110, each capable of mounting a tool holder 71, a plurality of first pipes 310 that are provided on the rotating body 60 and arranged at intervals from one another circumferentially about the rotating center axis 110 and that serve to suck chips, a second pipe 320 that is provided inside the rotating body 60, and a connection mechanism 90 that selectively connects the second pipe 320 to any of the plurality of first pipes 310.

[0083] With this configuration, the multiple first pipes 310 are arranged at intervals from one another in the circumferential direction of the rotation central axis 110, so that the first pipes 310 can be provided in a form suitable for chip suction depending on the type of tool to be used for chip suction. Furthermore, the connection mechanism 90 selectively connects the second pipe 320 to one of the multiple first pipes 310, so that chips can be collected through the first pipe 310 and the second pipe 320 provided inside the rotating body 60. This allows the turret-type tool rest 50 to reliably collect chips regardless of the type of tool indexed to the workpiece machining position.

[0084] Furthermore, at least one of the plurality of first pipes 310 includes a flexible nozzle 211 that has an opening 216, is deformable so that the position and orientation of the opening 216 change, and is capable of retaining its shape after deformation.

[0085] According to this configuration, by deforming the flexible nozzle 211, the position and orientation of the opening 216 can be adjusted.

[0086] The rotating body 60 further has a cylindrical portion 66 that protrudes from the multiple mounting portions 61 in the axial direction of the rotating central axis 110 and extends around the rotating central axis 110. The multiple first pipes 310 are each provided in the cylindrical portion 66 and include multiple first holes 241 that open to an outer peripheral surface 66a of the cylindrical portion 66.

[0087] With this configuration, the opening of the first hole 241 on the outer surface 66a of the cylindrical portion 66 is brought close to the tool holder attached to the attachment portion 61, making it possible to more simply configure the first piping 310 that sucks in chips generated at the cutting edge of the tool.

[0088] The connection mechanism 90 also includes a piston 91 provided with a second hole 242 that communicates with the second pipe 320. The piston 91 is slidable between a first position Pa where the second pipe 320 is connected to the first pipe 310 via the second hole 242 by the piston 91 abutting against the rotating body 60, and a second position Pb where the piston 91 is separated from the rotating body 60.

[0089] With this configuration, by sliding the piston 91 to the first position Pa, chips can be sucked through the first pipe 310 and the second pipe 320, and by sliding the piston 91 to the second position Pb, the rotating body 60 can be rotated.

[0090] The tool rest 50 is further provided with a flange 81 that is provided inside the swivel body 60 and is made of a shaped body formed by additive machining. The second piping 320 includes a third hole 243 that is provided in the flange 81.

[0091] According to this configuration, the flange 81 is made of a shaped body formed by additional processing, and therefore the path of the second pipe 320 through the third hole 243 can be freely set.

[0092] The tool post 50 also includes a built-in motor 231 provided inside the multiple mounting portions 61. The rotating body 60 further includes a cylindrical portion 66 that protrudes from the multiple mounting portions 61 in the axial direction of the central axis of rotation 110 and extends around the central axis of rotation 110. The flange 81 includes a disk portion 82 that fits inside the cylindrical portion 66.

[0093] According to this configuration, by fitting the disk portion 82 inside the cylindrical portion 66, foreign matter such as coolant or chips can be more reliably prevented from entering the space that houses the built-in motor 231.

[0094] The tool post 50 further includes a built-in motor 231 that is provided inside the multiple mounting parts 61 and is capable of outputting rotation about a rotation center axis 140 that is perpendicular to the rotation center axis 110. The second piping 320 includes a pipe member 315 that is routed inside the multiple mounting parts 61 at a position that is spaced apart from the rotation center axis 110 radially outward from the rotation center axis 110.

[0095] According to this configuration, by routing the pipe member 315 at a position away from the central axis of rotation 110 and radially outward from the central axis of rotation 110, interference between the pipe member 315 and the built-in motor 231 can be avoided.

[0096] The tool rest 50 further includes a suction device 41 that is mounted on the tool rest 50 and is capable of sucking chips through the first pipe 310 and the second pipe 320 .

[0097] According to this configuration, by disposing the suction device 41 closer to the first pipe 310, a sufficient suction force can be obtained.

[0098] Machine tool 100 also includes tool rest 50. With this configuration, chips are reliably collected by tool rest 50, allowing workpiece machining in machine tool 100 to proceed smoothly.

[0099] From another perspective, the configuration of the tool rest 50 will be described. The tool rest 50 includes a rotating body 60, which is a cylindrical body centered on the rotating center axis 110 and can rotate about the rotating center axis 110. The rotating body 60 has a plurality of mounting portions 61 arranged circumferentially about the rotating center axis 110, each capable of mounting a tool holder 71. The rotating body 60 also includes a first pipe 310 provided on the rotating body 60 for suctioning chips. The rotating body 60 further includes a cylindrical portion 66 that protrudes from the mounting portions 61 in the axial direction of the rotating center axis 110 and extends around the rotating center axis 110. The first pipe 310 is provided in the cylindrical portion 66 and includes a first hole 241 that opens to an outer circumferential surface 66a of the cylindrical portion 66. In this respect, it is preferable that the rotating body 60 be provided with at least one first pipe 310.

[0100] With this configuration, the opening of the first hole 241 on the outer surface 66a of the cylindrical portion 66 is brought close to the tool holder attached to the attachment portion 61, making it possible to more simply configure the first piping 310 that sucks in chips generated at the cutting edge of the tool.

[0101] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0102] 21 work spindle, 22 chuck, 31 saddle, 32 cross slide, 33 base, 41 suction device, 50 tool rest, 60 swivel, 61, 61A, 61B, 61C, 61D mounting portion, 61a mounting surface, 61b end surface, 66 cylindrical portion, 66a outer circumferential surface, 66h, 92h seal groove, 67 cover, 71 tool holder, 72, 221 lid, 76 tool rest base, 81 flange, 82 disk portion, 82a first surface, 82b second surface, 83 first protrusion, 84 second protrusion, 86 piston arrangement hole, 87 piping connection port, 88, 97 seal member, 90 connection mechanism, 91 piston, 91m flange, 92 tip portion, 93 base end portion, 95p first air chamber, 95q Second air chamber, 96 connecting pin, 100 machine tool, 101, 140 rotation center axis, 110 swivel center axis, 120 first internal space, 130 second internal space, 150 piston center axis, 160 machining area, 211 flexible nozzle, 212, 315 tubular member, 213 nozzle tip, 216 opening, 231 built-in motor, 232 motor housing, 233 rotor, 241 first hole, 242 second hole, 243 third hole, 310, 310B, 310C, 310D first piping, 320 second piping, Pa first position, Pb second position.

Claims

1. a rotating body that is a cylindrical body having a center on the central axis of rotation and that has a plurality of mounting portions arranged in a circumferential direction of the central axis of rotation, each of which can mount a tool holder, and that is rotatable about the central axis of rotation; a plurality of first pipes provided on the rotating body and arranged at intervals from one another in a circumferential direction of the rotation central axis, for sucking chips; A second pipe provided inside the rotating body; a connection mechanism that selectively connects the second pipe to any one of the plurality of first pipes.

2. 2. The tool post according to claim 1, wherein at least one of the plurality of first pipes includes a flexible nozzle having an opening, being deformable so that the position and orientation of the opening can be changed, and being capable of retaining the shape after deformation.

3. the rotating body further includes a cylindrical portion protruding from the plurality of mounting portions in the axial direction of the central axis of rotation and extending around the central axis of rotation, The tool post according to claim 1 , wherein the plurality of first pipes are each provided in the cylindrical portion and include a plurality of first holes that open to an outer circumferential surface of the cylindrical portion.

4. the connection mechanism includes a piston having a second hole communicating with the second pipe; 2. The tool post according to claim 1, wherein the piston is slidable between a first position in which the piston abuts against the rotating body to connect the second pipe to the first pipe via the second hole, and a second position in which the piston is separated from the rotating body.

5. A machine tool comprising the tool post according to claim 1 or 2.

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