JP2006192550A - Tool rest - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool rest having versatility, wherein a rotational angle position of the tool is adjusted with a simple mechanism and correspond to various machining shapes. <P>SOLUTION: The tool rest is equipped with: a tool holder for holding the tool; a multi-prismatic turret 30 which is rotatably supported and has a plurality of tool holders detachably mounted to an outer peripheral surface; and an indexing mechanism for indexing a predetermined tool holder (tool) at the machining position by rotating the turret 30. The tool rest is also equipped with: an annular first coupling 31 having a tooth 31a radially formed at equal spaces in the circumferential direction 31 on the whole surfaces of the one end surface; and an annular second coupling having a tooth part which is radially formed at the same angular spaces as the tooth 31a of the first coupling 31 and engaged with the tooth 31a at least three places of the one end surface in the circumferential direction. The first coupling 31 is provided at the one side of the tool holder mounting surface 30a of the turret outer peripheral surface 30 and the turret mounting surface of the tool holder, and the second coupling is provided at the other side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention includes a tool holder for holding a tool, a polygonal turret that is rotatably supported and a plurality of the tool holders are detachably attached to an outer peripheral surface, and a predetermined tool holder (tool) by rotating the turret. ) To a tool post including an indexing mechanism for indexing to a machining position.

  The turret is provided on a lathe, which is one of machine tools, and is a rotating tool holder that holds a turning tool such as a cutting tool, or a rotary tool that rotatably holds a rotating tool such as an end mill or a drill about its axis. A tool holder, a polygonal column-shaped turret that is rotatably supported and a plurality of tool holders are detachably attached to an outer peripheral surface, and a plurality of tool holders (tools) attached to the turret by rotating the turret, An indexing mechanism for indexing a predetermined tool holder (tool) to a machining position, a rotary drive mechanism for rotating a rotary tool held by the rotary tool holder at the machining position, and the like. And in the said lathe, a workpiece | work is processed with the turning tool or rotary tool indexed to the processing position by the indexing mechanism.

  By the way, the rotary tool holder is usually attached to the outer peripheral surface of the turret so that the axis of the held tool is parallel to or perpendicular to the axis of the main spindle holding the workpiece. The shape includes, for example, a hole shape that is inclined with respect to the workpiece axis. Therefore, when processing such a shape, a rotary tool holder that has been manufactured exclusively for the shape is conventionally used. It has been proposed to use a rotary tool holder (see JP-A-6-226510) as shown.

  The rotating tool holder 100 shown in FIG. 8 is attached to the tool holder mounting surface 110a on the outer peripheral surface of the turret 110, and the mounting member 101 having a fixed surface 101a orthogonal to the tool holder mounting surface 110a is formed in a circular outer periphery. The fixed portion 102a is fixed to and supported by the fixed surface 101a of the mounting member 101, and the housing 102 is rotatably supported about the axis by the housing 102 and holds the tool T at the tip portion. It consists of a tool spindle 103 and a transmission mechanism 104 that transmits the driving force of the rotary drive mechanism 111 disposed on the turret 110 to the tool spindle 103 and rotates it around the axis.

  The attachment member 101 includes a convex portion 101b that is inserted into a hole 110b that opens into the tool holder attachment surface 110a and is connected to the inside of the turret 110, and is attached to the tool holder attachment surface 110a by a fixing bolt 105. The housing 102 includes a plurality of arc-shaped elongated holes 102b formed on the outer peripheral side of the fixed portion 102a, and the fixed portions 102a are fixed to the fixing surface of the mounting member 101 by fixing bolts 106 inserted into the elongated holes 102b. While being fixed to 101a, the tool spindle 103 is held so that its axis is parallel to the fixed surface 101a. The housing 103 is rotatable in a direction indicated by an arrow around a predetermined rotation center axis O orthogonal to the fixed surface 101a, and this rotation is allowed by the elongated hole 102b.

  The transmission mechanism 104 is rotatably supported about the shaft center by the mounting member 101, and a rotation shaft 104a whose tip is protruded from the convex portion 101b and a tip of the rotation shaft 104a are fixedly configured to constitute a rotation drive mechanism 111. A plurality of gears (not shown) and a rotating shaft (not shown) for transmitting the rotational force of the rotating shaft 104a to the tool main shaft 103, which are disposed inside the mounting member 101 and the housing 102. (Not shown). The rotational drive mechanism 111 includes a drive shaft 111b that is rotated about a shaft by a drive motor (not shown), and a rotary shaft 111c and a gear 111d for transmitting the rotational force of the drive shaft 111b to the gear 111a. , 111e, 111f.

  In the rotary tool holder 100 configured as described above, when processing the workpiece W gripped by the chuck 116 of the spindle 115, the tool T is indexed at a predetermined rotational angle position according to the processing content. Specifically, first, the fixing bolt 106 is loosened and the housing 102 is rotated about the rotation center axis O in the direction indicated by the arrow with respect to the mounting member 101, and then the fixing bolt 106 is tightened to fix the housing 102. Is fixed to the fixing surface 101 a of the mounting member 101. As the tool T rotates together with the housing 102 in this manner, the tool T is indexed at a predetermined rotational angle position.

  Thereafter, when the drive shaft 111b is rotated about the axis by a drive motor (not shown) of the rotation drive mechanism 111, the rotational force of the drive shaft 111b is transmitted to the tool spindle 103 via the transmission mechanism 104 or the like. The tool spindle 103 (tool T) rotates about the axis, and the workpiece W is machined into a predetermined shape.

JP-A-6-226510

  However, the conventional rotary tool holder 100 has a complicated structure, a large number of parts, and an expensive problem, a problem that the structure is complicated and the rigidity becomes low, and the transmission mechanism 104 has a rotating shaft. Since a plurality of rotating shafts and gears such as 104a and gear 104b are provided and the configuration thereof is complicated, there is a problem that the transmission efficiency of the driving force from the rotation driving mechanism 111 is lowered.

  On the other hand, when a dedicated rotary tool holder is manufactured, there are problems that it takes cost and days to manufacture the rotary tool holder, and that it cannot be used for processing of other shapes.

  The present invention has been made in view of the above circumstances, and provides a versatile turret capable of adjusting the rotational angle position of a tool with a simple mechanism and capable of dealing with various machining shapes. For that purpose.

To achieve the above object, the present invention provides:
A tool holder for holding a tool, a polygonal column turret that is rotatably supported and a plurality of the tool holders are detachably attached to an outer peripheral surface, and a plurality of tool holders attached to the turret by rotating the turret A tool post provided with an indexing mechanism for indexing a preset tool holder to a machining position,
An annular first coupling having teeth formed radially at equal intervals in the circumferential direction at one end surface and at least three in the circumferential direction, and radially at the same angular intervals as each tooth of the first coupling And further comprising an annular second coupling having at least three teeth on one end surface and in the circumferential direction that are formed and mesh with the teeth.
The first coupling is on one of the tool holder mounting surface of the turret outer peripheral surface and the turret mounting surface of the tool holder, the second coupling is on the other, and their axes are orthogonal to the mounting surfaces. In addition, the present invention relates to a tool post characterized in that these tooth portions are provided so as to be able to mesh with each other.

  According to this invention, when attaching the tool holder to the turret, each tooth portion of the first coupling provided on one side of the tool holder attaching surface and the turret attaching surface and the second cup provided on the other side. The tool holder is appropriately fixed to the turret by meshing with each tooth portion of the ring.

  Since the tooth portions of the first coupling and the second coupling are formed radially at equal intervals in the circumferential direction, the axes of the first coupling and the second coupling are coaxial. Thus, the tool holder is positioned with high accuracy with respect to the turret. Further, by rotating the tool holder around the axis of each coupling and engaging each coupling, the tool holder can be operated in a state where the tool is indexed at a predetermined rotational angle position corresponding to the angular interval of the tooth portion. Positioned.

  Thus, according to the tool post according to the present invention, by providing the tool holder mounting surface and the turret mounting surface with the couplings having the tooth portions, the tool can be accurately set at a predetermined rotational angle position with a simple mechanism. Indexing can be performed well, and the tool post can be a versatile tool post that can handle various machining shapes. Further, the structure of the tool holder, the turret, and the rotary drive mechanism is not complicated, and the rigidity, the manufacturing cost, and the driving force transmission efficiency are not lowered.

  Even if the tooth portion of the first coupling is formed on the entire surface of the one end surface, the same effect as described above can be obtained, and each coupling can be attached to and detached from each mounting surface. It is preferable that it is provided freely. In this way, it is only necessary to replace the first coupling or the second coupling even if the tooth portion is worn or damaged by repeatedly attaching and detaching the tool holder. , The replacement cost can be reduced.

  The tool held by the tool holder is a turning tool or a rotary tool, and the rotary tool is held by the tool holder such that its axis is perpendicular to or parallel to the turret mounting surface, for example.

  As described above, according to the tool rest according to the present invention, the tool held by the tool holder is obtained by positioning the tool holder on the turret by meshing the teeth of the first coupling and the second coupling with each other. Since the rotation angle position of the tool post can be adjusted, the turret is versatile with a simple mechanism without incurring a reduction in rigidity, an increase in manufacturing cost, or a reduction in transmission efficiency of the driving force from the rotation drive mechanism. You can have it. Further, by providing each coupling detachably, the replacement cost when the tooth portion is worn or damaged can be reduced.

  Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view showing a schematic configuration of a tool post according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view in the direction of arrows AA in FIG. 3 is a cross-sectional view showing a schematic configuration of the rotary tool holder according to the present embodiment, and FIG. 4 is a side view in the direction of arrow B in FIG. 5 is a side view showing the outer peripheral surface of the turret according to the present embodiment, and FIG. 6 is a cross-sectional view in the direction of arrow CC in FIG.

  As shown in FIGS. 1 and 2, the tool post 1 of this example is a rotary tool holder 10 that holds a turning tool S such as a cutting tool, and a rotary tool that holds a rotary tool T such as an end mill or a drill so as to be rotatable about its axis. Tool holders 11 and 20, a turret 30 that is formed in a polygonal column shape, and a plurality of tool holders 10, 11, and 20 are detachably attached to the outer peripheral surface, and the turret 30 is rotatable about its axis L in the direction of the arrow. The turret body 35 to be supported and the turret 30 are rotated, and among the plurality of tool holders 10, 11, 20 (tools S, T) attached thereto, predetermined tool holders 10, 11, 20 (tool S) , T) is provided with an indexing mechanism 40 for indexing to the machining position, and a rotary drive mechanism 50 for rotating the rotary tool T held by the rotary tool holders 11 and 20 at the machining position about the axis. It is.

  The tool post main body 35 is, for example, a lathe (not shown) provided with a first main shaft (not shown) and a second main shaft (not shown) facing the first main shaft with a predetermined interval. The axis L of the turret 30 is disposed in parallel with the axis of the first main axis and the second main axis between the first main axis and the second main axis. In addition, the tool post 1 of this example can be applied to various machine tools in addition to such a lathe.

  As shown in FIGS. 1 to 4, the rotary tool holder 20 includes a housing 21 in which a flange 22 having a turret mounting surface 22a is formed, and a convex portion 23 protruding in the center of the turret mounting surface 22a is formed. The shaft is supported in parallel with the turret mounting surface 22a and rotatably around the axis by the holder side coupling 24 formed on the turret mounting surface 22a of the flange 22 and the housing 21, and is attached to the tip portion. A tool spindle 25 that holds the rotary tool T, a rotary shaft 26 that is supported by a housing 21 so that the axis is orthogonal to the turret mounting surface 22a and is rotatable about the axis. The flange 22 has a circular outer shape, and the convex portion 23 is formed in a cylindrical shape.

  The housing 21 supports the tool spindle 25 so that its tip end protrudes, and supports the rotary shaft 26 so that one end thereof protrudes, and is screwed into a screw hole 33 described later on the outer peripheral surface of the turret 30. It is fixed by a fixing bolt 27. The turret mounting surface 22a of the flange 22 is formed with an annular mounting hole 22b in which the holder side coupling 24 is detachably mounted so that its axis is coaxial with the axis of the rotary shaft 26. .

  Three tooth portions 24a, 24b, and 24c are formed on the upper surface of the holder side coupling 24 at equal intervals in the circumferential direction. These tooth portions 24a, 24b, and 24c are turret side couplings to be described later. It consists of teeth formed radially at the same angular intervals as the 31 teeth 31a.

  Gears 25a and 26a are fixed to the rear end side of the tool spindle 25 and the other end side of the rotary shaft 26, respectively, and mesh with each other in the internal space of the housing 21, and the meshing of the gears 25a and 26a. Due to the relationship, the rotational force of the rotary shaft 26 is transmitted to the tool spindle 25. Further, an engagement protrusion 26b that can be engaged with an engagement groove 52a of a rotation shaft 52 (to be described later) of the rotation drive mechanism 50 is formed at one end of the rotation shaft 26. The rotational force of the rotary shaft 52 is transmitted to the rotary shaft 26 due to the engagement relationship with the joint groove 52a, and the rotary shaft 26 (tool spindle 25 (rotary tool T)) rotates about the axis.

  Although the detailed description of the rotary tool holder 11 is omitted, the rotary tool holder 11 includes a tool spindle 12 that is rotatably supported about the axis so that the axis is orthogonal to the turret mounting surface 22a of the rotary tool holder 11. The tool spindle 12 holds the rotary tool T at the tip, and an engagement protrusion 12a that can engage with the engagement groove 52a of the rotation shaft 52 of the rotation drive mechanism 50 is formed at the rear end. Yes.

  As shown in FIGS. 1, 2, 5, and 6, the outer surface of the turret 30 functions as a plurality of tool holder mounting surfaces 30 a, and is formed in an annular shape. Part) The turret side coupling 31 provided with 31a, one side is open to the tool holder mounting surface 30a, the other side is connected to the internal space 30b of the turret 30, and the axis is orthogonal to the tool holder mounting surface 30a. The formed through hole 32 into which the convex portion 23 of the rotary tool holder 20 is inserted and the tool holder mounting surface 30a are formed in an annular shape, and the axis of the turret side coupling 31 is coaxial with the axis of the through hole 32. The mounting hole 30b is detachably mounted, and the screw hole 33 is screwed with the fixing bolt 27 for mounting the rotary tool holder 20 (housing 21).

  The turret 30 only needs to be configured as described above for the mounting portion of the rotary tool holder 20, and the mounting portions of the turning tool holder 10 and the rotating tool holder 11 are configured so that they can be appropriately mounted. Just do it. The through hole 32 is formed to be slightly larger than the outer diameter of the convex portion 23 of the rotary tool holder 20.

  The turret side coupling 31 is disposed in the mounting hole 30b so as to protrude from the tool holder mounting surface 30a, and the teeth 31a are radially formed at equal intervals in the circumferential direction. The rotary tool holder 20 is attached to the turret 30 in a state where the three tooth portions 24a, 24b, and 24c of the coupling 24 are engaged with each other.

  As shown in FIG. 2, the indexing mechanism 40 is attached to the tool post body 35, and a drive motor 41 having a gear 41 a fixed to an output shaft is formed in an annular shape and is arranged to face each other. It comprises a carbide coupling 42, a second carbide coupling 43, a clamp mechanism 44 that moves the second carbide coupling 43 in the direction of the arrow D-E, and the like.

  The first curbic coupling 42 is provided with teeth on a surface (a surface on the arrow D direction side) facing the second curbic coupling 43, and is provided with an outer annular member 42a and an inner annular member which are provided to be relatively rotatable. The outer annular member 42a is fixed to the turret 30 and the inner annular member 42b is fixed to the tool post body 35, respectively. Teeth that mesh with the gear 41a of the output shaft of the drive motor 41 are formed on the outer peripheral surface of the outer annular member 42a, and the outer annular member 42a is driven to rotate by driving the drive motor 41 to rotate the gear 41a. As a result, the turret 30 rotates with respect to the tool post body 35.

  The second Curbic coupling 43 has teeth on the surface facing the first Curbic coupling 42 (the surface on the arrow E direction side), and an arrow D− between the turret 30 and the tool post body 35 is provided. It is held movably in the E direction.

  The clamp mechanism 44 includes a piston 45 movably held in the direction indicated by an arrow D-E between the inner annular member 42 b and the tool post body 35, a second carbic coupling 43, and the tool post main body 35. A first hydraulic chamber 46 formed therebetween, a second hydraulic chamber 47 formed between the piston 45 and the inner annular member 42b, and a pressure oil supply source for supplying pressure oil to each of the hydraulic chambers 46, 47 ( (Not shown).

  Then, when pressurized oil is supplied into the first hydraulic chamber 46, the second curb coupling 43 moves in the direction of arrow E together with the piston 45, and the second curb coupling 43 and the first curbic are moved. The teeth of the coupling 42 mesh with each other, and the turret 30 is positioned with respect to the tool post body 35 and clamped in a non-rotating manner (see the upper side of the axis L of the turret 30 in FIG. 2).

  On the other hand, when pressurized oil is supplied into the second hydraulic chamber 47, the piston 45 moves in the direction indicated by the arrow D to move the second curb coupling 43 in the same direction, and the second curb coupling 43 And the first carbic coupling 42 are released, and the turret 30 can be rotated (refer to the lower side of the axis L of the turret 30 in FIG. 2). At this time, when the turret 30 is rotated by the drive motor 41, the predetermined tool holders 10, 11, and 20 can be determined at the processing positions.

  It should be noted that a pin 49 urged in the direction indicated by the arrow D by the spring body 48 is engaged with the second Curbic coupling 43, and the second Curbic coupling 43 and the first carbing 43 are engaged by this pin 49. When the big coupling 42 is not meshed, the second carbide coupling 43 is prevented from rotating.

  The rotational drive mechanism 50 is disposed in the internal space 30b of the turret 30 and is supported by the tool post body 35 in a non-rotating manner, and the housing 51 causes the axis to face the outer peripheral surface of the turret 30 and to be centered on the axis. The rotary shaft 52 is rotatably supported, a drive motor 53 that rotates the rotary shaft 52 about its axis, a rotation restricting member 54 fixed to the housing 51, and the like.

  The rotary shaft 52 has an engagement groove 52a formed at one end thereof, and the engagement groove 52a is engaged with the rotary shaft 26 of the rotary tool holder 20 indexed to the machining position by the indexing mechanism 40. The engaging protrusion 26b or the engaging protrusion 12a of the tool spindle 12 of the rotary tool holder 11 is configured to be engageable.

  The rotation restricting member 54 is composed of a substantially annular member, and includes an annular groove 54a on the outer peripheral surface. The annular protrusion 54a of the rotary tool holder 20 in which the annular groove 54a is located at a position other than the machining position, The rotary tool holder 11 is engaged with both side surfaces in the width direction of the engaging projections 12 a of the tool spindle 12 to restrict the rotation of the rotary shaft 26 and the tool spindle 12.

  The drive motor 53 is provided on the outer peripheral surface of the rotary shaft 52, and includes a rotor 53a made of a permanent magnet, and a stator 53b made of a coil, which is provided so as to surround the rotor 53a with a predetermined interval. When the rotor 53a rotates relative to the stator 53b (by driving the drive motor 53), the rotation shaft 52 rotates about the axis. The drive motor 53 is configured to index and stop the rotation shaft 52 so that the engagement groove 52a of the rotation shaft 52 is parallel to the annular groove 54a of the rotation restricting member 54 when the rotation is stopped. Thus, when the turret 30 is rotated by the indexing mechanism 40, the engagement protrusions 26a, 12a and the annular groove 54a can be engaged, or the engagement protrusions 26a, 12a and the engagement groove 52a can be engaged. it can.

  According to the tool post 1 of this example configured as described above, when attaching the rotary tool holder 20 to the turret 30, first, the tooth portions 24a, 24b, 24c of the holder side coupling 24 of the rotary tool holder 20 are used. And the teeth 31a of the turret side coupling 31 of the turret 30 are engaged with each other.

  At this time, since the tooth portions 24a, 24b, 24c and the teeth 31a are radially formed at equal intervals in the circumferential direction, the holder-side coupling 24 and the turret-side coupling 31 have coaxial axes. Thus, the rotary tool holder 20 is positioned with high accuracy with respect to the turret 30.

  Further, as shown in FIG. 7, the rotary tool T is rotated about the axis of each coupling 24, 31 to engage the respective coupling 24, 31, so that the rotary tool T is engaged with the tooth portions 24 a, 24 b, The rotary tool holder 20 is positioned in a state of being indexed at a predetermined rotational angular position corresponding to the angular interval between the 24c and the tooth 31a. Thus, the rotary tool T can be determined at a predetermined rotation angle position according to the machining content of the workpiece.

  Thereafter, when the fixing bolt 27 is screwed into the screw hole 33 and the rotary tool holder 20 is fixed to the turret 30 by the fixing bolt 27, the attachment of the rotary tool holder 20 to the turret 30 is completed. The turning tool holder 10 and the rotary tool holder 11 are also fixed to the turret 30 as appropriate.

  In the lathe (not shown), for example, as shown in FIG. 7, the workpiece W gripped by the chuck 6 of the first spindle 5 is processed by the rotary tool T indexed at a predetermined rotational angle position. The rotary tool T that is indexed to the machining position by the indexing mechanism 40 and rotated about the axis line by the rotation drive mechanism 50 or the turning tool S that is indexed to the machining position by the indexing mechanism 40 The workpiece held on the first spindle (not shown) or the second spindle (not shown) is machined.

  Thus, according to the tool post 1 of this example, by providing the holder side coupling 24 on the rotary tool holder 20 side and the turret side coupling 31 on the turret 30 side, the rotary tool T can be obtained with a simple mechanism. The tool post 1 can be accurately indexed at a predetermined rotation angle position, and the tool post 1 can be a versatile tool post 1 capable of dealing with various machining shapes. Further, the structures of the rotary tool holder 20, the turret 30, and the rotary drive mechanism 50 are not complicated, and the rigidity, the manufacturing cost, and the driving force transmission efficiency are not reduced.

  Furthermore, since the holder side coupling 24 and the turret side coupling 31 are configured to be detachable with respect to the rotary tool holder 20 and the turret 30, the tooth portions 24a and 24b can be obtained by repeatedly attaching and detaching the rotary tool holder 20. , 24c and the teeth 31a are worn or damaged, only the holder side coupling 24 and the turret side coupling 31 need to be replaced, so that the replacement cost can be reduced.

  It is also possible to reverse the rotating tool holder 20 and attach it to the turret 30. That is, the workpiece held on either the first main shaft (not shown) or the second main shaft (not shown) is processed. The rotary tool holder 20 is attached to the turret 30 so that the rotary tool T faces the front side (for example, the direction indicated by arrow F in FIG. 5) or the back side (for example, the direction indicated by arrow G in FIG. 5). And the usability of the tool post 1 can be improved.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect which this invention can take is not limited to this at all.

  In the above example, the coupling 31 having teeth 31a formed on the entire upper surface is provided on the turret 30 side, and the coupling 24 having three teeth portions 24a, 24b and 24c formed on the upper surface is provided on the rotary tool holder 20 side. However, the present invention is not limited to this, and the coupling 31 may be provided on the rotary tool holder 20 side and the coupling 24 may be provided on the turret 30 side. Further, the coupling 24 may have a configuration in which teeth are provided on the entire upper surface as in the case of the coupling 31, and the coupling 31 has a configuration in which three teeth portions are provided on the upper surface as in the case of the coupling 24. There may be. Furthermore, the tooth portions 24a, 24b, and 24c of the holder side coupling 24 are not necessarily provided at equal circumferential positions.

  In the above example, only the rotary tool holder 20 is configured to be positioned by the meshing relationship between the holder-side coupling 24 and the turret-side coupling 31, but the present invention is not limited to this, and the turning tool holder 10 is not limited thereto. Similarly to the rotary tool holder 20, the turning tool holder 10 can be determined so that the turning tool S can be indexed at a predetermined rotational angle position by the meshing relationship between the holder side coupling 24 and the turret side coupling 31. And the turret 30 may be configured.

  In the above example, the tool holders 10, 11, and 20 are fixed by the fixing bolts 27, but the fixing method of the tool holders 10, 11, and 20 is not limited to bolt fixing. Furthermore, an arc-shaped elongated hole may be formed in the flange 22 of the housing 21, and the fixing bolt 27 may be inserted into the elongated hole and screwed into the screw hole 33.

It is the front view which showed schematic structure of the tool post which concerns on one Embodiment of this invention. It is sectional drawing of the arrow AA direction in FIG. It is sectional drawing which showed schematic structure of the rotary tool holder which concerns on this embodiment. It is a side view of the arrow B direction in FIG. It is the side view which showed the turret outer peripheral surface which concerns on this embodiment. It is sectional drawing of the arrow CC direction in FIG. It is explanatory drawing which showed the relationship between a rotary tool and a workpiece | work. It is the front view which showed schematic structure of the rotary tool holder which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tool post 10 Turning tool holder 11, 20 Rotary tool holder 21 Housing 22 Flange 22a Turret mounting surface 23 Convex part 24 Holder side coupling 24a, 24b, 24c Tooth part 25 Tool spindle 26 Rotating shaft 30 Turret 30a Tool holder mounting surface 31 Turret side coupling 31a Teeth (tooth part)
32 Through hole 35 Turret body 40 Indexing mechanism 50 Rotation drive mechanism

Claims (3)

A tool holder for holding a tool, a polygonal column turret that is rotatably supported and a plurality of the tool holders are detachably attached to an outer peripheral surface, and a plurality of tool holders attached to the turret by rotating the turret A tool post provided with an indexing mechanism for indexing a preset tool holder to a machining position,
An annular first coupling having teeth formed radially at equal intervals in the circumferential direction at one end surface and at least three in the circumferential direction, and radially at the same angular intervals as each tooth of the first coupling And further comprising an annular second coupling having at least three teeth on one end surface and in the circumferential direction that are formed and mesh with the teeth.
The first coupling is on one of the tool holder mounting surface of the turret outer peripheral surface and the turret mounting surface of the tool holder, the second coupling is on the other, and their axes are orthogonal to the mounting surfaces. In addition, the tool rest is provided so that these tooth portions can be engaged with each other.   The turret according to claim 1, wherein the tooth portion of the first coupling is formed on the entire surface of one end surface.   3. The tool post according to claim 1, wherein each coupling is detachably provided on each mounting surface. 4.

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