JP6493607B1 - Turning tool - Google Patents

Abstract

A rolling tool capable of preventing an attachment error in advance is provided. A rolling tool 1 includes a second cutter body 4R that rolls a workpiece when rotated in a first direction D11. When in the first arrangement rotated in the second direction D21 rather than in the second arrangement, the second cutter body 4R can be detached from the tool body 2R. The tool main body 2R has at least one stopper bolt 7. The second cutter body 4R has at least one stopper passage 45. The stopper passage 45 extends in the first direction D11 so as to include a position corresponding to the stopper bolt 7 in the first arrangement, and has a width W3 larger than the head 71 of the stopper bolt 7 in the radial direction Dr. . [Selection] Figure 7

Description

  The present invention relates to a turning tool.

  There is a rolling tool in which a disc-shaped cutter body is configured to be removable from a tool body such as an arbor (see, for example, Patent Document 1). If the fixing bolt is completely removed from the tool body every time the cutter body is replaced, the time required for the replacement work is extended. Wear of the internal thread and fixing bolt of the tool body also increases. The cutter body is configured so that it can be replaced by slightly loosening the fixing bolt attached to the tool body.

  The cutter body is formed with a slot for attaching to the tool body. One end of the slot is formed in an enlarged diameter portion larger than the diameter of the head of the fixing bolt. The other end of the slot is formed in a reduced diameter portion that is smaller than the head of the fixing bolt and larger than the screw portion. When attaching the cutter body to the tool body, first, the head of the fixing bolt is inserted into the enlarged diameter portion. Next, the cutter main body is rotated to guide the head of the fixing bolt to the reduced diameter portion. When the fixing bolt is tightened with the head of the fixing bolt positioned at the reduced diameter portion, the cutter body is fixed to the tool body.

JP 2005-186226 A

The cutter body has a right-handed one that can cut the workpiece when the tool body connected to the spindle of the machine tool is rotated forward (clockwise as viewed from the spindle of the machine tool), and the tool body is reversed. There are two types: left-handed ones that can be cut when rotated (counterclockwise when viewed from the machine tool spindle). Depending on the work site, both cutter bodies may be present. The right-handed cutter body and the left-handed cutter body have the same appearance when turned over. There is a risk that an error may occur in which the right-handed cutter body is attached to the tool body by mistake when the right-handed cutter body is attached.
Then, an object of this invention is to provide the turning tool which can prevent an attachment mistake beforehand.

  A rolling tool according to an aspect of the present invention includes a tool body that rotates about a rotation axis, and a cutter body that rolls a workpiece when rotated in a first direction. When the positional relationship between the tool body and the cutter body is in the first arrangement, the cutter body can be removed from the tool body. When in the second arrangement, the cutter body is secured to the tool body. The second arrangement is an arrangement in which the cutter body is rotated relative to the tool body in the second direction opposite to the first direction than in the first arrangement. The tool body has a plurality of internal threads and at least one protrusion. A fixing bolt for fixing the cutter body is screwed into the female screw. The cutter body has a plurality of through holes, a plurality of slots, and at least one stopper passage. Each through hole is provided at a position corresponding to each female screw in the first arrangement. Each slot extends in the first direction from each through hole. The stopper passage extends along the first direction, and a position corresponding to the protrusion in the first arrangement is included between one end and the other end of the stopper passage. Each through-hole has a width larger than the head of the bolt in the radial direction perpendicular to the rotation axis. Each slot has a width smaller than the head of the bolt and larger than the threaded portion in the radial direction. The stopper passage has a larger width than the protrusion in the radial direction. The angular displacement between the position corresponding to the protrusion in the first arrangement and the other end of the stopper passage is greater than or equal to the angular displacement between the first arrangement and the second arrangement.

  According to this aspect, the extension directions of the stopper passages are opposite to each other between the right-handed cutter body whose first direction is forward rotation and the left-handed cutter body whose first direction is reverse rotation. Even if you try to fix the left-handed cutter body to the right-handed tool body or to fix the right-handed cutter body to the left-handed tool body, the protrusion provided as a stopper Due to the interference, the cutter body cannot be moved to the second direction opposite to the first direction to be in the second arrangement. It is possible to prevent an erroneous installation of the cutter body.

In the above aspect, the stopper passage and the through hole may communicate with each other, and at least a part of the stopper passage may overlap the through hole.
According to this aspect, since the protrusion which becomes the stopper in the second arrangement can be formed so as to overlap the through hole or the slot, the stopper passage outside the through hole can be shortened. Since the stopper passage is shortened, the strength of the cutter body can be improved.

In the above aspect, in addition to the fixing bolt, a stopper bolt different from the fixing bolt may be fixed to the cutter body, and the protrusion may be the head of the stopper bolt.
According to this aspect, it is possible to configure the protrusion serving as the stopper by using an easily available and inexpensive bolt. Furthermore, by replacing the stopper bolts with the female screw for the right hand and the female screw for the left hand, one tool body can be adjusted for both the left hand and the right hand.

In the above aspect, the stopper passage may penetrate the cutter body in the axial direction of the rotation shaft.
According to this aspect, since the position of the projection can be visually recognized from the outside through the opened stopper passage, workability when attaching the cutter body is improved.

In the above aspect, the plurality of through holes may be formed at equal intervals in the first direction, and a plurality of stopper passages may be formed adjacent to each through hole.
According to this aspect, since it is not necessary to confirm the orientation of the protrusion and the stopper passage and perform alignment, workability when attaching the cutter body is improved.

  ADVANTAGE OF THE INVENTION According to this invention, the turning tool which can prevent an attachment mistake beforehand can be provided.

FIG. 1 is a perspective view showing an example of a turning tool according to the first embodiment of the present invention. FIG. 2 is a perspective view showing the tool body shown in FIG. FIG. 3 is a perspective view showing a state in which the second cutter body is removed from the rolling tool shown in FIG. 1. FIG. 4 is a rear view showing the second cutter body viewed from the spindle side of the machine tool. FIG. 5 is an enlarged perspective view showing the through hole and the slot shown in FIG. FIG. 6 is a perspective view showing the through hole and the slot with the fixing bolt omitted. FIG. 7 is a front view showing the positional relationship of the first arrangement. FIG. 8 is a front view showing the positional relationship of the second arrangement. FIG. 9 is a front view showing an example of the second cutter body according to the second embodiment of the present invention. FIG. 10 is a front view showing an example of the second cutter body according to the third embodiment of the present invention. FIG. 11 is a rear view showing an example of the second cutter body according to the fourth embodiment of the present invention.

  A preferred embodiment of the present invention will be described with reference to the accompanying drawings. In addition, in each figure, what attached | subjected the same code | symbol has the same or similar structure. One of the features of the rolling tool 1 of each embodiment of the present invention is that a protrusion is provided so that an attachment error between the right-handed cutter body 4R and the left-handed cutter body 4L does not occur. . A stopper bolt 7 (an example of a protrusion) provided on the tool body 2R, 2L side such as an arbor is used in combination with a stopper passage 45 provided on the cutter body 4R, 4L side. Even if the cutter body 4R is attached by rotating in the second direction D21, if the stopper passage 45 is not formed along the movement locus 71A-71B of the stopper bolt 7, the stopper bolt 7 interferes and is fixed. Cannot move to the second configuration. Hereinafter, each configuration will be described in detail with reference to FIGS.

[First Embodiment]
FIG. 1 is a perspective view showing an example of a rolling tool 1 according to the first embodiment of the present invention. In the example shown in FIG. 1, the rolling tool 1 includes a tool body 2R and a pair of first and second cutter bodies 3R, 4R. When the tool body 2R rotates forward in the first direction D11, The cutting insert 5 attached to the outer periphery of the second cutter main bodies 3R, 4R is configured to cut the workpiece. The first and second cutter bodies 3R and 4R are examples of cutter bodies, and may be simply referred to as cutter bodies 3 and 4, respectively.

  The rolling tool 1 may be configured to rotate one cutter body 4 instead of rotating the two cutter bodies 3 and 4 simultaneously, or may include three or more cutter bodies 3 and 4. ... may be configured to rotate simultaneously. The first and second cutter bodies 3 and 4 may be front milling cutters or side cutters. The cutter main bodies 3 and 4 may be configured with a left hand that cuts the workpiece when the main shaft rotates in the reverse direction. The left-handed cutter body 4L will be described later with reference to FIG.

  FIG. 2 is a perspective view showing an example of the tool body 2. In the example shown in FIG. 2, the tool body 2 is a cylindrical arbor, and is configured to be fixed to the main shaft of the machine tool and rotate around the rotation axis Z. As shown in FIG. 2, the tool main body 2 has a first surface 21 attached to the main shaft of the machine tool and an annular second surface 22 that supports the cutter main bodies 3 and 4. A plurality of female screws 23 are formed on the second surface 22 along the rotation direction such as the first direction D11. In the example shown in FIG. 2, four female screws 23 are formed at equal intervals.

  A cylindrical shaft portion 24 protrudes from a region surrounded by the female screw 23. In the example shown in FIG. 2, a cylindrical spacer 25 is inserted through the shaft portion 24. The thickness of the workpiece after processing can be adjusted by the thickness of the spacer 25. Through holes 27 are formed in the flat surface 26 of the spacer 25 at positions corresponding to the respective female screws 23, that is, positions overlapping with the respective female screws 23 when viewed along the axial direction Dz of the rotation axis Z. Yes. In the example shown in FIG. 2, a key 28 is formed on the second surface 22 on which the female screw 23 is formed. The spacer 25 and the key 28 are not essential components, and may be omitted when the cutter body 4 is a single sheet.

  FIG. 3 is a perspective view showing a state in which the first cutter body 3R is attached to the tool body 2R adjusted for the right hand. In other words, it is a perspective view showing a state in which the second cutter body 4R is removed from the rolling tool 1 shown in FIG. In the first cutter body 3R, a key groove (not shown) formed at a position corresponding to the key 28 and a through hole (not shown) formed at a position corresponding to the female screw 23 are formed. The plurality of fixing bolts 6 are inserted into the through holes 27 of the spacer 25 and the through holes of the first cutter body 3 </ b> R, and are screwed into the female screws 23 formed on the second surface 22.

  One of the features of the cutting tool 1 of the present invention is that the tool body 2 is provided with a protrusion as a stopper for preventing an attachment error. In the example shown in FIG. 3, the protrusion is the head 71 of the stopper bolt 7 that passes through the spacer 25 and the first cutter body 3 </ b> R and is fixed to the second surface 22. The configuration of the protrusion is not limited to the example shown in FIG. 3. For example, the protrusion may be a protrusion formed integrally with the spacer 25, or may be a stopper bolt that is screwed into a female screw that does not penetrate the spacer 25. There may be. There may be a plurality of protrusions.

  FIG. 4 is a rear view showing the second cutter body 4R viewed from the spindle side of the machine tool. As shown in FIG. 4, the second cutter body 4 </ b> R is formed in a disk shape having an open center. A plurality of cutting inserts 5 are fixed to the outer peripheral portion of the second cutter body 4R. Note that the method for fixing the cutting edge of the cutting insert 5 or the like is not limited to the throw-away method shown in FIG. 4 and may be brazing or the like. The third surface 41 of the second cutter body 4R faces the flat surface 26 of the spacer 25.

  In other words, the third surface 41 of the second cutter body 4R faces the second surface 22 of the tool body 2R shown in FIG. 2 via the spacer 25 and the first cutter body 3R shown in FIG. ing. In the following description, the position of the third surface 41 of the second cutter body 4R and the position corresponding to an arbitrary structure of the second surface 22 of the tool body 2R is when viewed along the axial direction Dz. , Indicates a position to be superimposed on the arbitrary structure.

  The third surface 41 is adjacent to the through-hole 43 from the opposite side of the slot 44, the through-hole 43 formed corresponding to the position of the female screw 23 on the second surface 22, the slot 44 communicating with the through-hole 43. A stopper passage 45 is formed. The through hole 43 and the slot 44 penetrate through the second cutter body 4 </ b> R to the fourth surface 42 opposite to the third surface 41. In the example shown in FIG. 4, the stopper passage 45 is formed as a bottomed pocket that does not penetrate to the fourth surface 42. For example, the depth of the stopper passage 45 is slightly deeper than the height of the head 71 of the stopper bolt 7 in the axial direction Dz.

  As described above, the second cutter body 4R is configured to scrape the workpiece when rotated in the first direction D11. In such a second cutter body 4R, each slot 44 extends in the first direction D11 with each through hole 43 as a starting point. The stopper passage 45 extends along the first direction D11 so as to include a position 71A corresponding to the stopper bolt 7 in the first arrangement.

  In the example shown in FIG. 4, the stopper passage 45 communicates with the adjacent through hole 43 on the first direction D11 side (the other end 45B side), and one end 45A of the stopper passage 45 is located outside the through hole 43. The other end 45 </ b> B is located inside the through hole 43. That is, at least a part of the stopper passage 45 overlaps the through hole 43 in the axial direction Dz. The other end 45 </ b> B may pass through the through hole 43 and reach the slot 44.

  Alternatively, the stopper passage 45 does not necessarily have to communicate with the through hole 43. Regardless of whether or not it communicates with the through hole 43, the angular displacement (rotation angle) from the position 71A corresponding to the stopper bolt 7 in the first arrangement to the other end 45B of the stopper passage 45 in the first direction D11. The angular displacement between the first arrangement and the second arrangement may be greater than or equal to. When not communicating with the through-hole 43, for example, the stopper passage 45 is a groove that is longer than a locus along which the threaded portion 62 of the fixing bolt 6 moves in the process in which the second cutter body 4R rotates from the first arrangement to the second arrangement. Or a long hole. The first arrangement and the second arrangement, which are the positional relationship between the tool main body 2R and the second cutter main body 4R, will be described later with reference to FIGS.

  In the radial direction Dr perpendicular to the rotation axis Z, each through-hole 43 has a width W1 larger than the diameter of the head 61 (see FIG. 3) of the fixing bolt 6 screwed into the female screw 23. Each slot 44 has a width W2 that is smaller than the head 61 of the fixing bolt 6 and larger than the nominal diameter of the threaded portion 62 (see FIG. 3) of the fixing bolt 6. The stopper passage 45 has a width W3 that is larger than the diameter of the head 71 (see FIG. 3) of the stopper bolt 7.

  5 is an enlarged perspective view showing the through hole 43 and the slot 44 as viewed from the fourth surface 42 side, and FIG. 6 is a perspective view showing the through hole 43 and the slot 44 with the fixing bolt 6 omitted. is there. As shown in FIGS. 5 and 6, a counterbore 46 is formed on the fourth surface 42 along the slot 44. The depth of the counterbore 46 is formed slightly deeper than the height of the head 61 of the fixing bolt 6 in the axial direction Dz, for example.

  FIG. 7 is a front view showing the positional relationship of the first arrangement, and FIG. 8 is a front view showing the positional relationship of the second arrangement. As shown in FIGS. 7 and 8, in the second arrangement, the second cutter body 4R is rotated in the second direction D21 opposite to the first direction D11 with respect to the tool body 2R than in the first arrangement. It is. In the example shown in FIGS. 7 and 8, the second arrangement is an arrangement in which the second cutter body 4R is rotated by 25 ° in the second direction D21 with respect to the tool body 2R than in the first arrangement.

  When the positional relationship between the tool main body 2R and the second cutter main body 4R is in the first arrangement shown in FIG. 7, the head 61 of the fixing bolt 6 is positioned in the through hole 43, and the second cutter main body 4R is moved to the tool main body. It becomes removable from 2R. When the positional relationship between the tool main body 2R and the second cutter main body 4R is in the second arrangement shown in FIG. 8, the head 61 of the fixing bolt 6 is positioned in the slot 44, and the second cutter main body 4R is in the tool main body 2R. Fixed to.

  In the second cutter body 4R, the position 71B corresponding to the stopper bolt 7 in the second arrangement is displaced by 25 ° from the position 71A corresponding to the stopper bolt 7 in the first arrangement. A stopper passage 45 is formed on the third surface 41 of the second cutter body 4 so as to include the trajectories 71A-71B that the head 71 of the stopper bolt 7 has moved.

  One end 45A of the stopper passage 45 is located closer to the first direction D11 than the position 71A corresponding to the head 71 of the stopper bolt 7 in the first arrangement, and the other end 45B of the stopper passage 45 is the stopper in the second arrangement. It is located on the second direction D21 side with respect to the position 71B corresponding to the head 71 of the bolt 7 for use. When the angular displacement between the first arrangement and the second arrangement is 25 °, the angular displacement between the position 71A and the other end 45B is 25 ° or more.

  In the example shown in FIGS. 7 and 8, in the axial direction Dz, a position 71A corresponding to the stopper bolt 7 in the first arrangement is superimposed on the end portion 45A side including one end 45A and the vicinity thereof, and the other end 45B and The position 71B of the stopper bolt 7 in the second arrangement is superimposed on the end portion on the other end 45B side including the vicinity thereof. In other words, the angular displacement between the end on the one end 45A side and the end on the other end 45B side is substantially the same as the angular displacement between the first arrangement and the second arrangement.

  When replacing the second cutter body 4R from the positional relationship of the second arrangement shown in FIG. 8, first, the fixing bolt 6 is slightly loosened. Next, the second cutter body 4R is rotated so as to be twisted in the first direction D11 with respect to the tool body 2R, and the head 61 of the fixing bolt 6 is guided to the through hole 43. When the positional relationship of the first arrangement shown in FIG. 7 is reached, the second cutter body 4R can be removed and disassembled to the state where the first cutter body 3R is attached to the tool body 2R shown in FIG.

  Conversely, when attaching the second cutter body 4R to the tool body 2R shown in FIG. 3, first, the end of the stopper passage 45 on the second direction D21 side (one end 45A side) faces the stopper bolt 7. The head 61 of the fixing bolt 6 is inserted into the through hole 43 in the direction. Next, the second cutter body 4R is rotated relative to the tool body 2R in the second direction D21 to guide the head 61 to the end 44C of the slot 44 on the first direction D11 side. At this time, the head 71 of the stopper bolt 7 is guided to the through hole 43 through the stopper passage 45 extending in the first direction D11. As a result, the positional relationship between the tool main body 2R and the second cutter main body 4R becomes the second arrangement shown in FIG. When the fixing bolt 6 is tightened with the head 61 positioned at the end 44C of the slot 44, the second cutter body 4R is fixed to the tool body 2R.

  FIG. 9 is a front view showing an example of the left-handed second cutter body 4L attached to the left-handed tool body 2L. If the left-handed second cutter body 4L is mistakenly attached to the right-handed tool body 2R shown in FIG. 3, the right-handed second cutter whose first direction D11 shown in FIG. The extension direction of the stopper passage 45 extending in the first directions D11 and D12 is reversed between the main body 4R and the left-handed second cutter main body 4L in which the first direction D12 is reversely rotated. Therefore, the head 71 of the right-hand stopper bolt 7 is not disposed at the end 45 </ b> A side of the stopper passage 45 but at the end 44 </ b> C of the slot 44 on the opposite side across the through hole 43. If the left-handed second cutter body 4L is rotated in the second direction D21 relative to the right-handed tool body 2R, the head 71 of the stopper bolt 7 interferes with the end 44C of the slot 44. Therefore, the second cutter body 4L cannot be moved to the second arrangement.

  According to the rolling tool 1 of the first embodiment configured as described above, the right-handed second cutter body 4R in which the first direction D11 is forward rotation and the left-handed in which the first direction D12 is reverse rotation. In the second cutter body 4L, the extending directions of the stopper passages 45 are opposite to each other. If the position of the female screw of the stopper bolt 7 and the extending direction of the stopper passage 45 are not the correct combination, the second cutter body 4L cannot be rotated to the second position, so the second cutter body 4R, 4L is incorrectly attached. Can be prevented in advance.

  In the present embodiment, the protrusion serving as a stopper is constituted by the head 71 of the stopper bolt 7. Because it is a bolt, it is easy to obtain and inexpensive. Moreover, it can be easily replaced. If a right-handed female screw and a left-handed female screw are formed on the second surface 22 of the tool body 2 or the spacer 25, the stopper bolt 7 is replaced, and one tool body 2 is used for the left hand and the right hand. It can be adjusted to either.

  In the present embodiment, the stopper passage 45 communicates with the adjacent through hole 43 on the first direction D11 side (the other end 45B side). In the second arrangement shown in FIG. 8, the stopper passage 45 can be formed so as to overlap the through hole 43 and the slot 44, so that the length of the stopper passage 45 outside the through hole 43 can be shortened. Since the stopper passage 45 is shortened, the strength of the second cutter body 4R can be improved.

  Next, the rolling tool 1 according to second to fourth embodiments of the present invention will be described. In the second to fourth embodiments, description of matters common to the first embodiment is omitted, and only different points will be described.

[Second Embodiment]
The second embodiment will be described with reference to FIG. The second embodiment is different from the first embodiment in that the first and second cutter bodies 3 and 4 are configured as a left hand instead of a right hand. In the left-handed second cutter body 4L, the first direction D12 is clockwise when viewed from the front end side of the rolling tool 1 (counterclockwise when viewed from the spindle side of the machine tool). That is, the first direction D11 according to the first embodiment and the first direction D12 according to the second embodiment are opposite to each other. As shown in FIG. 9, the slot 44 and the stopper passage 45 extend in the first direction D12. Even in the second embodiment configured to be left-handed, it is possible to prevent an erroneous attachment of the second cutter body 4L in the same manner as in the first embodiment configured to be right-handed.

[Third Embodiment]
The third embodiment will be described with reference to FIG. The third embodiment is different from the first embodiment in that the stopper passage 45 is not a bottomed pocket but penetrates up to the fourth surface 42 in the axial direction Dz, like the slot 44. According to the third embodiment, since the position of the stopper bolt 7 can be visually recognized from the outside through the stopper passage 45 opened in the fourth surface 42, workability when attaching the second cutter body 4R is improved.

[Fourth Embodiment]
The fourth embodiment will be described with reference to FIG. The fourth embodiment is different from the first embodiment in that a plurality of stopper passages 45 are formed adjacent to the respective through holes 43. According to the fourth embodiment, since it is not necessary to confirm the orientation of the stopper bolt 7 and the stopper passage 45 for alignment, workability when attaching the second cutter body 4R is improved.

  The embodiments described above are for facilitating the understanding of the present invention, and are not intended to limit the present invention. Each element included in the embodiment and its arrangement, material, condition, shape, size, and the like are not limited to those illustrated, and can be changed as appropriate. In addition, the structures shown in different embodiments can be partially replaced or combined.

  DESCRIPTION OF SYMBOLS 1 ... Turning tool, 2, 2L, 2R ... Tool main body, 3, 3L, 3R ... 1st cutter main body, 4, 4L, 4R ... 2nd cutter main body (an example of a cutter main body), 5 ... Cutting insert, 6 ... Fixing bolt, 7 ... Stopper bolt, 21 ... First surface, 22 ... Second surface, 23 ... Female thread, 24 ... Shaft, 25 ... Spacer, 26 ... Flat surface, 27 ... Spacer through hole, 28 ... Key, 41 ... third surface, 42 ... fourth surface, 43 ... through hole of second cutter body, 44 ... slot, 44C ... end of slot, 45 ... stopper passage, 45A ... one end, 45B ... other end, 46 ... seat Repetition part, 61 ... head part of fixing bolt, 62 ... screw part of fixing bolt, 71 ... head part of stopper bolt (an example of protrusion), 71A ... position of stopper bolt in the first arrangement, 71B ... second arrangement Position of stopper bolt in D11, D1 ... first direction, D21 ... second direction, Dr ... radially, Dz ... axial, W1 ... through hole in the width, W2 ... slot width, W3 ... stopper passage width, Z ... rotary shaft.

Claims (5)

A tool body that rotates about a rotation axis;
A cutter body for rolling the workpiece when rotated in the first direction,
When the positional relationship between the tool body and the cutter body is in the first arrangement, the cutter body can be detached from the tool body, and when the positional relation is in the second arrangement, the cutter body is the tool body. A rolling tool fixed to
The second arrangement is an arrangement in which the cutter body is rotated in a second direction opposite to the first direction with respect to the tool body, compared to the first arrangement.
The tool body has a plurality of internal threads and at least one protrusion,
The cutter body is
A plurality of through holes provided at positions corresponding to the female screw in the first arrangement;
A slot extending in the first direction starting from each of the through holes;
It extends from one end to the other end along the first direction, and in one pair of adjacent through holes, the one end is located between the slot starting from one of the through holes and the other through hole. And the other end is located in the other through-hole, and has at least one stopper passage including a position corresponding to the protrusion in the first arrangement between the one end and the other end. And
Each of the through holes has a width larger than a head of a fixing bolt screwed into the female screw in a radial direction orthogonal to the rotation axis, and each of the slots is larger than the head in the radial direction. A width that is smaller and larger than the threaded portion of the fixing bolt, and the stopper passage has a width that is larger than the protrusion in the radial direction,
The angular displacement between the position corresponding to the projection until the other end in the first arrangement state, and are angularly displaced or between the second placement and the first placement,
The stopper passage, wherein the other of said through hole said slot that starting from the communicates from the opposite side to the through hole of the other, that at least a portion of the stopper passage not overlap in the through-hole , Turning tools. 2. The rolling tool according to claim 1, wherein an end portion on one end side including the one end and the vicinity thereof overlaps with a position corresponding to the protrusion in the first arrangement.   The rolling according to claim 1 or 2, wherein, in addition to the fixing bolt, a stopper bolt different from the fixing bolt is fixed to the cutter body, and the protrusion is a head of the stopper bolt. tool.   The rolling tool according to any one of claims 1 to 3, wherein the stopper passage passes through the cutter body in an axial direction of the rotation shaft.   5. The plurality of through holes are formed at equal intervals in the first direction, and a plurality of the stopper passages are formed adjacent to each of the through holes. 6. The turning tool described in 1.