Cutting tool attachment member, holder, and machine tool

Abstract

Provided is a cutting tool attachment member, a holder, and a machine tool capable of reducing blade element attachment errors without processing a cutting tool.　This cutting tool attachment member according to the present disclosure is attachable to a flange part of a cutting tool holding a blade element. An attempt to attach the cutting tool attachment member to the flange part and to attach the cutting tool to a holder brings about, depending on the state of an engaging part provided for the cutting tool attachment member, a wrong attachment state in which an engaged part provided for the holder is engaged with the engaging part, or the correct attachment state in which the engaged part is not engaged with the engaging part.

Description

Cutting tool mounting member, holder, and machine tool

[0001] The present disclosure relates to a cutting tool that holds a cutting tool, a holder, and a machine tool.

[0002] Conventionally, technologies related to cutting tools for attaching cutting tools to tool posts have been proposed. In Patent Document 1 below, a key is formed on the spindle of a tool post for attaching a cutting tool. This key is formed in a position and size that fits into a groove formed in the cutting tool when the cutting tool is attached to the spindle.

[0003] Japanese Patent Application Laid-Open No. 60-16329

[0004] By the way, for the purpose of reducing the time required for replacing the cutting tool and reducing the deviation in accuracy due to the replacement, there is a mechanism called a quick change mechanism. The cutting tools of the quick change mechanism can attach different types of cutting tools as long as they have the same specifications. Therefore, when replacing the cutting tool (cutting tool) attached to a tool post or the like, there is a risk of misidentifying the type of cutting tool to be attached or misplacing the position of the holder for attaching the cutting tool. In order to prevent the occurrence of such mounting errors, when performing processing such as forming protrusions on the cutting tool, it is necessary to perform processing according to the configuration and mounting position of the machine tool, which causes a problem of increased costs.

[0005] The present disclosure has been made in view of the above problems, and an object thereof is to provide a cutting tool mounting member, a holder, and a machine tool that can suppress the occurrence of mounting errors of cutting tools without performing processing on the cutting tools.

[0006] To solve the above problems, this specification discloses a cutting tool mounting member that can be attached to the flange portion of a cutting tool that holds a cutting tool, wherein when the cutting tool mounting member is attached to the flange portion and the cutting tool is to be attached to the holder, depending on the state of the engaging portion provided on the cutting tool mounting member, it will be either in an incorrect mounting state in which the engaging portion and the engaged portion provided on the holder engage, or in a correct mounting state in which the engaged portion and the engaging portion do not engage. It should be noted that the contents of this disclosure are not limited to implementation as a cutting tool mounting member, but are also extremely useful when implemented as a holder to which a cutting tool can be attached, or a machine tool to which a holder can be attached.

[0007] According to the cutting tool mounting member, holder, and machine tool of this disclosure, it is possible to suppress the occurrence of errors in mounting the cutting tool without performing any processing on the cutting tool.

[0008] A perspective view showing the state in which a tool holder is attached to the tool post of a machine tool according to the first embodiment, with the cutting tool mounting member removed. A perspective view showing the state in which the first cutting tool is removed from the tool holder according to the first embodiment, with the cutting tool mounting member removed. A plan view of the sleeve according to the first embodiment. A perspective view showing the state in which the cutting tool mounting member is attached to each of the first cutting tools according to the first embodiment. A plan view showing the state in which the cutting tool mounting member is attached to each of the first cutting tools according to the first embodiment, and the tool holder is viewed from the outside in the X-axis direction. A perspective view of the cutting tool mounting member according to the first embodiment. An exploded perspective view of the cutting tool mounting member according to the first embodiment. A diagram showing an example of a pattern in which the second screw member is attached to the six screw holes according to the first embodiment. A diagram showing an incorrect mounting state in which the first cutting tool 13B is attached to the first mounting part 22A. A perspective view showing the cutting tool mounting member of the second embodiment. A perspective view showing a cutting tool mounting member of the third embodiment.

[0009] (First Embodiment) Hereinafter, an embodiment of the cutting tool mounting member of the present disclosure will be described with reference to the drawings. First, an example of a tool holder to which the cutting tool mounting member of the present disclosure is attached will be described. Figure 1 is a perspective view showing a tool holder 12 attached to the tool post 11 of a machine tool 10. Figure 2 is a perspective view showing the first cutting tools 13A and 13B removed from the tool holder 12. Both Figure 1 and Figure 2 show the state with the cutting tool mounting member 41 (see Figure 4), which will be described later, removed.

[0010] As shown in Figures 1 and 2, the tool post 11 is, for example, a roughly regular dodecagonal prism. Twelve holder mounting sections 11A are provided on the sides of the tool post 11 to which tool holders 12 can be attached. Figures 1 and 2 show the state in which a tool holder 12 is attached to one of the twelve holder mounting sections 11A. Figures 1 and 2 also show the state in which the tool holder 12 is positioned at the indexing position for indexing the cutting tool 13 used to process the workpiece.

[0011] The tool post 11 is supported by the shaft 14 of the machine tool 10 shown in Figure 1 and rotates around the rotation axis 15 to change the indexed position of the cutting tool 13. In the following description, the direction parallel to the rotation axis 15 will be referred to as the Z-axis direction, the direction perpendicular to the Z-axis direction and along the radial direction of the tool post 11 will be referred to as the X-axis direction, and the direction perpendicular to both the X-axis direction and the Z-axis direction will be referred to as the Y-axis direction. Furthermore, the descriptions will be based on the direction in which the tool holder 12 shown in Figures 1 and 2 is indexed to the indexing position.

[0012] Each of the multiple holder mounting portions 11A has multiple threaded portions 11B into which bolts are screwed. For example, the tool holder 12 is fixed to the holder mounting portion 11A via a spacer 17 that adjusts the height of the cutting tool 13 in the X-axis direction. In this embodiment, the tool holder 12 is provided with a tool holding portion 21 that holds multiple cutting tools 13 at the tip of the holder mounting portion 11A that extends in the X-axis direction.

[0013] The tool holder 21 has a predetermined thickness in the X-axis direction and is roughly plate-shaped, extending in the Y-axis and Z-axis directions. The tool holder 21 has two first mounting sections 22A and 22B and two second mounting sections 22C and 22D. A cutting tool 13 can be attached to each of the first and second mounting sections 22A to 22D. In the following description, the cutting tools 13 attached to each of the first and second mounting sections 22A to 22D will be referred to in this order as the first cutting tool 13A, the first cutting tool 13B, the second cutting tool 13C, and the second cutting tool 13D. Also, when referring to all cutting tools collectively, they will be written as cutting tool 13.

[0014] Each of the first and second cutting tools 13A to 13D is, for example, a tool that meets the specifications of a so-called quick-change mechanism, and is a cutting tool having a tip 23 and a tool mounting portion 27 to which the tip 23 is fixed. As the specifications of the quick-change mechanism, for example, the CAPTO® specifications can be adopted. However, as the specifications of the quick-change mechanism are not limited to the CAPTO® specifications, other specifications such as BT shank, BBT shank, and HSK shank may also be adopted. The first and second mounting portions 22A to 22D have the same configuration, although their positions and orientations differ. The first and second mounting portions 22A to 22D can accommodate the same or different types of cutting tools 13 that meet the same quick-change mechanism specifications. The first and second mounting portions 22A to 22D are interchangeable, for example, even if the types of cutting tools such as the tip 23 are different, as long as the mounting portion of the cutting tool 13 (shank portion 29, described later) meets the specified specifications. Therefore, the following explanation will mainly focus on the first mounting portion 22A and the first cutting tool 13A, and will omit explanations of other mounting portions and cutting tools as appropriate.

[0015] Furthermore, the cutting tool 13 can be a throwaway tool, a brazed tool, a solid tool, etc. Also, the cutting tool 13 is not limited to a tool. The tip 23 is an example of a cutting tool of this disclosure. The cutting tool of this disclosure is not limited to a tip, but may also be a drilling tool such as a drill. Therefore, the cutting tool 13 may be, for example, a cutting tool that meets the specifications for a quick-change mechanism and to which a cutting tool such as a drill can be attached. Also, the cutting tool of this disclosure may be a cutting tool having a flange portion as described later. Also, the cutting tool of this disclosure may be a cutting tool that does not meet the specifications for a quick-change mechanism. For example, it may be a configuration having a shank (shank portion) for manually adjusting the blade protrusion. For this reason, the cutting tool of this disclosure can be a cutting tool that is inserted into the machine (holder), etc.

[0016] As shown in Figure 2, the first cutting tool 13A has a tool mounting portion 27 to which the tip 23 is attached, a flange portion 28, and a shank portion 29. The tip 23 is attached to the tip of the tool mounting portion 27, and the flange portion 28 is provided at the base end of the tool mounting portion 27.

[0017] The flange portion 28 has a substantially cylindrical shape. Multiple grooves 28A are formed along the outer circumference of the flange portion 28. For example, grooves 28A are formed in the flange portion 28 at 90-degree intervals in the circumferential direction, resulting in a total of four grooves 28A. These grooves 28A are used, for example, when changing the cutting tool 13 using an automatic tool changer (ATC). In this embodiment, these grooves 28A are also used to attach the cutting tool mounting member 41 (see Figure 4), which will be described later.

[0018] The shank portion 29 is provided on the base end surface of the flange portion 28 and is formed to protrude from the flange portion 28 in a direction parallel to the Z-axis direction. The first mounting portion 22A has an insertion hole 31, a sleeve 32, a locking mechanism 33, and a locking bolt 34. The insertion hole 31 is formed in the tool holding portion 21 in a direction parallel to the Z-axis direction. The tool holding portion 21 has openings for the insertion hole 31 formed on a pair of opposing end faces 21A and 21B in the Z-axis direction. In the case of Figure 2, the front end face 21A has two openings for the insertion hole 31, each of the first mounting portions 22A and 22B. The rear end face 21B has two openings for the insertion hole 31, each of the second mounting portions 22C and 22D.

[0019] A sleeve 32 is attached to the opening of each insertion hole 31. Figure 3 shows a plan view of the sleeve 32 as seen from the outside. As shown in Figures 2 and 3, the sleeve 32 has an insertion hole portion 32A and a plate portion 32B. The insertion hole portion 32A is, for example, cylindrical in shape. The sleeve 32 is attached to the insertion hole 31 with the insertion hole portion 32A inserted into the insertion hole 31. The sleeve 32 is attached to the insertion hole 31 with the plate portion 32B in contact with (engaged with) the end face 21A.

[0020] The plate portion 32B is plate-shaped and surrounds the opening of the insertion hole 31. As shown in Figure 3, the plate portion 32B is thin in the Z-axis direction and, for example, when viewed from one side in the Z-axis direction, has two straight edges 37 along the Y-axis direction and an arc portion 38 connecting the ends of the two straight edges 37. In other words, the plate portion 32B is shaped as a circular plate cut out by two straight lines along the Y-axis direction (radial direction) and by two straight lines in the X-axis direction that are at the same radius with the center of the circle in between.

[0021] The plate portion 32B has, for example, a plurality (six in this embodiment) of screw holes 32D. The six screw holes 32D are formed at the center of the circumferential direction and at both ends of the arc portion 38, and are formed at equal intervals in the circumferential direction. The plate portion 32B is fixed to the tool holding portion 21 by screwing a first screw member 35 into each of the six screw holes 32D, and the first screw member 35 is screwed against the end face 21A. The first screw member 35 is, for example, a bolt 35A or an Irizer® registered trademark 35B with a female thread formed thereon. The screw member in this disclosure is not limited to the above types, but may be other screwable members such as screws or anchor bolts. In the following description, the bolt 35A and the Irizer® registered trademark 35B will be collectively referred to as the first screw member 35. Around the opening of the insertion hole 31, female threads are formed at equal intervals along the circumferential direction of the arc portion 38 for screwing in the first screw member 35. The sleeve 32 is fixed to the tool holding portion 21 by screwing multiple first screw members 35 into the screw hole 32D from the outside in the Z-axis direction.

[0022] The insertion hole portion 32A is formed in the center of the plate portion 32B and is a through hole (insertion hole) parallel to the Z-axis direction. The shank portion 29 of the first cutting tool 13A is, for example, a polygon tapered shank, and the cross-sectional shape of the through hole of the insertion hole portion 32A matches the cross-sectional shape of the shank portion 29, and is approximately triangular in shape (see Figure 3). In addition, a projection 32C (see Figure 3) is formed on the inner wall of the insertion hole portion 32A. A recess 29A (see Figure 2) is formed in the shank portion 29 to match the position of this projection 32C. Therefore, the user can attach the first cutting tool 13A to the first mounting portion 22A by aligning the recess 29A of the shank portion 29 with the projection 32C of the insertion hole portion 32A, without incorrectly oriented the first cutting tool 13A. Furthermore, even when the cutting tool mounting member 41, which will be described later, is attached, the orientation of the first cutting tool 13A will be correct, and the cutting tool mounting member 41 will function properly.

[0023] The first cutting tool 13A is installed with the shank portion 29 inserted into the sleeve 32 through the insertion hole portion 32A. The locking mechanism 33 is a device for fixing the shank portion 29 inserted into the sleeve 32. The locking bolts 34 are attached to the outer circumferential surface 21C, which is the outer surface of the tool holding portion 21 in the X-axis direction. The locking bolts 34 are, for example, hexagon socket head bolts, and four of them are provided, corresponding to the positions of the locking mechanisms 33 at the first and second mounting portions 22A to 22D.

[0024] The locking mechanism 33 switches between a state in which the first cutting tool 13A is fixed and a state in which it is released, for example, in response to the rotation of the locking bolt 34. The shank portion 29 has a hole formed in its base end face with an opening. The locking mechanism 33 has a locking part (not shown) that is inserted into the hole in the shank portion 29 from the opening in its base end face, and this locking part is provided with claws. When the locking bolt 34 is rotated clockwise, for example, the locking mechanism 33 fixes the first cutting tool 13A by spreading and pulling in the claws of the locking part inserted into the shank portion 29. Also, when the locking bolt 34 is rotated counterclockwise, the locking mechanism 33 releases the locking of the shank portion 29 by the claws of the locking part. This allows the user to quickly replace the first cutting tool 13A by rotating the locking bolt 34 with a hex wrench or the like. Similarly, the other mounting parts (first and second mounting parts 22B to 22D) are equipped with a locking mechanism (not shown) that switches between a state in which the first and second cutting tools 13A to 13D are fixed and a state in which they are released in accordance with the rotation of the lock bolt 34.

[0025] (Regarding the cutting tool mounting member 41) As described above, the first and second mounting portions 22A to 22D of the tool holder 12 in this embodiment are interchangeable with cutting tools 13 whose shank portion 29 meets a predetermined standard, even if the type of cutting tool such as the tip 23 is different. In other words, by making the shank portion 29 a common structure, it is possible to quickly change between different types of cutting tools 13. However, since any combination of cutting tools 13 and tool holders 12 that meet the standard can be mounted, there is a risk of mounting errors occurring.

[0026] Furthermore, the tool holder 12 of this embodiment allows multiple cutting tools 13 to be attached to a single tool holder 12. This increases the variety of cutting tools 13 that can be attached to the tool post 11. Also, the first and second mounting portions 22A to 22D are located at positions that are offset from each other in the Y-axis direction (see Figure 5). More specifically, the offset positions of the first and second mounting portions 22A to 22D cause the cutting edge positions of the first and second cutting tools 13A to 13D to be offset in the Y-axis direction. This prevents other cutting tools 13 from coming into contact with the workpiece when machining is being performed with any of the four cutting tools 13. In addition, the machine tool 10 can freely switch between the first and second cutting tools 13A to 13D by sliding the tool post 11 in the Y-axis direction.

[0027] However, in a configuration where multiple cutting tools 13 can be attached to a single tool holder 12, mounting errors of the cutting tools 13 become even more likely. In particular, because the configuration of all four mounting parts is identical, the probability of mounting errors increases when attaching different types of cutting tools 13 to a single tool holder 12.

[0028] Therefore, in this embodiment, in order to suppress the occurrence of mounting errors of the cutting tool 13, the cutting tool mounting member 41 shown in Figure 4 is attached to the cutting tool 13. Figure 4 shows the state in which the cutting tool mounting member 41 is attached to each of the first cutting tools 13A and 13B. Figure 5 shows the state in which the tool holder 12 with the cutting tool mounting member 41 attached is viewed from the outside in the X-axis direction. Figure 6 is a perspective view of the cutting tool mounting member 41. Figure 7 is an exploded perspective view of the cutting tool mounting member 41. Note that Figure 5 omits the illustration of the second cutting tools 13C and 13D.

[0029] As shown in Figures 4 to 7, the cutting tool mounting member 41 can be attached to the flange portion 28 (see Figure 2) of the cutting tool 13. The cutting tool mounting member 41 is, for example, an annular metal member with a through hole 43 formed therein. The cutting tool mounting member 41 may also be made of a material other than metal, such as resin. The through hole 43 is a hole with a circular cross-section. In the following description, each member of the cutting tool mounting member 41 will be described using the circumferential, radial, and axial directions.

[0030] The radius of the through-hole 43 is slightly longer than the radius of the cylindrical flange portion 28. Therefore, the cutting tool mounting member 41 is a cylindrical (annular) ring that follows the outer circumference of the flange portion 28 and can be detachably attached to the flange portion 28. This allows the cutting tool 13 to which the cutting tool mounting member 41 is attached to be appropriately changed depending on the combination of the holder mounting portion 11A, the tool holder 12, and the cutting tool 13.

[0031] As described above, four grooves 28A (see Figure 2) are formed in the flange portion 28. Multiple threaded holes 45 (see Figure 6) are formed in the cutting tool mounting member 41, penetrating in the radial direction (thickness direction). For example, a total of four threaded holes 45 are formed in the cutting tool mounting member 41 (only two are shown in Figure 6). Each of the four threaded holes 45 is formed, for example, penetrating the cutting tool mounting member 41 in the thickness direction and has a female thread. When the cutting tool mounting member 41 is fitted into the flange portion 28, a fixing member 46 (see Figure 6) is screwed into each of the four threaded holes 45. The fixing member 46 is, for example, an upset bolt. The cutting tool mounting member 41 is fixed to the flange portion 28 by fitting the tips of the fixing members 46 screwed into each of the four threaded holes 45 into the grooves 28A (see Figure 2) of the flange portion 28. This allows the cutting tool mounting member 41 to be fixed to the cutting tool 13 by tightening the fixing member 46 into the groove 28A through the screw hole 45. Furthermore, the cutting tool mounting member 41 can be removed from the cutting tool 13 by loosening the fixing member 46 and removing it from the groove 28A. Therefore, it is preferable that the thickness of the fixing member 46 is proportional to the width of the groove 28A. It is also preferable to widen the head side of the screw hole 45 so that the head of the fixing member 46 is embedded, preventing the head of the fixing member 46 from protruding from the surface of the plate mounting portion 53 (described later). Note that the fixing member 46 is not limited to an upset bolt; other members such as screws may also be used.

[0032] The four grooves 28A are provided at 90-degree intervals in the circumferential direction on the cylindrical flange portion 28. Therefore, the flange portion 28 has a pair of grooves 28A provided at positions offset by 180 degrees from each other in the circumferential direction of the flange portion 28. Of the four screw holes 45, two screw holes 45 and the remaining two screw holes 45 are provided at positions 180 degrees opposite each other in the circumferential direction of the flange portion 28. The cutting tool mounting member 41 is fixed to the flange portion 28 by screwing a fixing member 46 into each of the four screw holes 45 and fitting two fixing members 46 (a total of four) into each of the pairs of grooves 28A provided at positions offset by 180 degrees from each other.

[0033] This allows the cutting tool mounting member 41 to be firmly fixed to the flange portion 28 by screwing the fixing members 46 into the cylindrical flange portion 28 from positions 180 degrees opposite each other. Furthermore, by screwing the pair of fixing members 46 into the groove 28A from positions offset in the circumferential direction, at positions 180 degrees opposite each other, the cutting tool mounting member 41 can be fixed to the flange portion 28 even more firmly. This prevents the cutting tool mounting member 41 from rotating relative to the flange portion 28.

[0034] Furthermore, by aligning the groove 28A and the screw hole 45, the cutting tool mounting member 41 can be attached to the cutting tool 13 in the correct circumferential position (orientation). As will be described later, the outer circumferential surface of the cutting tool mounting member 41 is provided with a plate mounting portion 53 and a non-plate mounting portion 54, and based on the position of the non-plate mounting portion 54, the cutting tool mounting member 41 can be attached to the flange portion 28 in the correct circumferential position. In addition, a colored indicator member 47 is attached to the cutting tool mounting member 41. The correct circumferential position of the cutting tool mounting member 41 relative to the flange portion 28 can be determined by the color of this indicator member 47, and the correct circumferential position can also be determined by the positional relationship between the screw hole 45 and the groove 28A.

[0035] The method of fixing the cutting tool mounting member 41 described above is merely an example. For example, the cutting tool mounting member 41 may be fixed to the flange portion 28 by welding or the like, and may not be removable. Also, the number of screw holes 45 and fixing members 46 is not limited to the four described above; it may be one or more than four. Furthermore, the cutting tool mounting member 41 may be fixed by fitting the fixing members 46 into each of the two grooves 28A located at positions offset by 90 degrees in the circumferential direction of the flange portion 28.

[0036] Furthermore, marks may be provided to indicate the appropriate rotational position of the cutting tool mounting member 41 relative to the flange portion 28. For example, marks indicating the relationship between the projection 32C and recess 29A and the rotational position of the cutting tool mounting member 41 may be provided on the cutting tool mounting member 41 or the indicator member 47. Specifically, as described above, the rotational position of the first cutting tool 13A relative to the first mounting portion 22A is determined by the projection 32C and recess 29A. Therefore, marks indicating the correct mounting position (rotational position) of the cutting tool mounting member 41 relative to the flange portion 28 may be provided on the cutting tool mounting member 41 or the indicator member 47, based on the positions of the projection 32C and recess 29A.

[0037] Furthermore, the cutting tool mounting member 41 is capable of having multiple plates 49 attached to its outer surface. When attempting to attach the cutting tool mounting member 41 to the flange portion 28 and then attach the cutting tool 13 to the tool holder 12, the cutting tool mounting member 41 will be in either an incorrect mounting state or a correct mounting state, depending on the state of the plates 49 provided on the cutting tool mounting member 41.

[0038] An incorrect mounting state is when the second screw member 51 provided on the tool holder 12 engages with the plate 49 (see Figure 9). Conversely, a correct mounting state is when the second screw member 51 and the plate 49 do not engage. More specifically, as shown in Figure 7, the outer circumferential shape of the cutting tool mounting member 41 is, for example, a regular octagon. Eight planes are formed on the outer circumferential surface of the cutting tool mounting member 41. Of these eight planes, six are provided with plate mounting portions 53 to which the plate 49 can be attached. For the sake of explanation, the remaining two planes to which the plate 49 is not attached are referred to as non-plate mounting portions 54.

[0039] A screw hole 55 is formed in the plate mounting portion 53. The screw hole 55 is formed, for example, in the center of the plane when viewed from above, and penetrates the cutting tool mounting member 41 in the radial direction, and has a female thread. This screw hole 55 is not formed in the non-plate mounting portion 54.

[0040] In the circumferential direction, gaps 57 are formed between the plate mounting portions 53 and between the plate mounting portions 53 and the non-plate mounting portions 54. The gaps 57 are formed along the axial direction with a constant groove width in the circumferential direction. The six plate mounting portions 53 are formed in the circumferential direction to match the position of the first screw member 35 of the sleeve 32. Therefore, in the circumferential direction, three of the plate mounting portions 53 are positioned at a distance from the remaining three plate mounting portions 53. Three of the plate mounting portions 53 in a set are positioned adjacent to each other in the circumferential direction. In addition, non-plate mounting portions 54 are provided between the three plate mounting portions 53 and the remaining three plate mounting portions 53. The plate mounting portions 53 are provided at a position facing the screw hole 32D of the arc portion 38 in the axial direction. In addition, the non-plate mounting portions 54 are provided at a position facing the straight edge portion 37 in the axial direction.

[0041] The width 59 (see Figure 6) of the cutting tool mounting member 41 (plate mounting portion 53 and non-plate mounting portion 54) in the axial direction matches the width of the flange portion 28 in the axial direction. When the fixing member 46 is fitted into the groove 28A to fix the cutting tool mounting member 41, the end face on the base end side (shank portion 29 side) of the cutting tool mounting member 41 in the axial direction is flush with the end face of the flange portion 28 (see Figure 5). The first cutting tool 13A is attached to the first mounting portion 22A with the cutting tool mounting member 41 and flange portion 28 in contact with the sleeve 32, or with a small gap between them and the sleeve 32. In addition, if a quick-change mechanism standard is adopted that provides a gap between the flange portion 28 and the sleeve 32 in the normal mounting state, the end face of the cutting tool mounting member 41 may protrude from the end face of the flange portion 28 toward the base end side in the axial direction.

[0042] The plate 49 is a plate-shaped member and is formed to the same size as the plane of the plate mounting portion 53. Therefore, the length of the plate 49 in the axial direction matches the width 59 of the non-plate mounting portion 54. A screw hole 61 is formed in the center of the plate 49, that is, at a position corresponding to the screw hole 55 of the non-plate mounting portion 54. The plate 49 is fixed to the plane of the plate mounting portion 53 by screwing fixing bolts 63 into the screw holes 61 and 55. The plate 49 can be attached to each of the six plate mounting portions 53. When the cutting tool mounting member 41 and the plate 49 are fixed to the first cutting tool 13A, the end face of the base end of the plate 49 in the axial direction is flush with the end face of the flange portion 28. The fixing bolt 63 is, for example, a socket head cap screw. Depending on the position in which the plate 49 is attached, the state of the plate 49 changes, and it can be changed to an incorrect mounting state or a correct mounting state.

[0043] Furthermore, the member used to fix the plate 49 is not limited to a bolt; a screw may also be used. The plate 49 may also be fixed to the cutting tool mounting member 41 in a way that prevents its removal. Alternatively, the plate 49 may be formed as part of the cutting tool mounting member 41. For example, the cutting tool mounting member 41, with the plate 49 positioned at a predetermined location, may be machined from a single cylindrical metal member. In this case, the plate 49 may be machined to the necessary position in relation to the second screw-fitting member 51 (see Figure 8). Therefore, the engaging portion of this disclosure may be configured to be non-removable from the cutting tool mounting member 41.

[0044] The second threaded member 51 is a member that is threaded onto the sleeve 32 and is, for example, a bolt. As described above, the sleeve 32 is formed with threaded holes 32D for threading each of the six first threaded members 35. For example, the second threaded member 51 has a male thread formed with the same pitch as the first threaded member 35 and can be threaded into the threaded hole 32D in place of the first threaded member 35. Therefore, the second threaded member 51 can be threaded into any of the six threaded holes 32D. Then, by protruding the second threaded member 51 from the sleeve 32 to a position where it interferes with the plate 49 of the cutting tool mounting member 41, the correct mounting position can be suggested by the combination of the plate 49 and the second threaded member 51. In other words, the mounting position can be suggested by the positions and numbers of the six second threaded members 51 and the six plates 49 to be attached.

[0045] Figure 8 shows an example of a pattern for attaching the second threaded member 51 to the six threaded holes 32D. As shown in Figure 8, for example, in a plan view of the sleeve 32, when the protrusion 32C is viewed from below, the threaded holes 32D are numbered first, second, third,..., sixth in the clockwise direction starting from the upper left threaded hole 32D. The top pattern A0 in Figure 8 shows a state where the second threaded member 51 is not attached.

[0046] Also, patterns A1, B1, C1,... show a state where only one second threaded member 51 is attached. For example, the first attachment portion 22A shown in FIGS. 4 and 5 corresponds to pattern B1 and shows a state where the second threaded member 51 is attached only to the second threaded hole 32D. Also, the first attachment portion 22B shown in FIGS. 4 and 5 shows a state where the second threaded member 51 is attached only to the fifth threaded hole 32D. The sleeve 32 can be attached with the second threaded member 51 in various combinations such as the patterns A2, B2, C2,... where two second threaded members 51 are attached and the patterns A3, B3, C3,... where three second threaded members 51 are attached in Figure 8.

[0047] As shown in FIGS. 4 and 5, only the plate 49 corresponding to the second one is removed from the cutting tool attachment member 41 attached to the first cutting tool 13A. Also, only the plate 49 corresponding to the fifth one is removed from the cutting tool attachment member 41 attached to the first cutting tool 13B. Therefore, when the first cutting tool 13A is attached to the first attachment portion 22A or when the first cutting tool 13B is attached to the first attachment portion 22B, since the plate 49 does not exist at the position of the second screwing member 51, the second screwing member 51 and the plate 49 do not engage, that is, it becomes a normal attachment state.

[0048] The first cutting tool 13A is attached to the first attachment portion 22A with the cutting tool attachment member 41 and the flange portion 28 in contact with the sleeve 32. In other words, in the normal attachment state, the first cutting tool 13A is locked by the lock mechanism 33 with the shank portion 29 inserted into the insertion hole 31 up to the position where the cutting tool attachment member 41 and the flange portion 28 are engaged with the sleeve 32.

[0049] Therefore, the flange portion 28 of the present embodiment is formed to have a larger diameter than the insertion hole 31 (through hole of the insertion hole portion 32A). When the cutting tool 13 inserts the shank portion 29 into the insertion hole 31 in the normal attachment state, the flange portion 28 contacts the opening of the insertion hole 31 (sleeve 32) and is positioned with respect to the tool holder 12. According to this, in the normal attachment state, the cutting tool 13 is positioned at a predetermined position by the flange portion 28. If it is arranged in the normal attachment state, the cutting tool 13 can be arranged at the same position and posture. Adjustment of the protrusion amount of the cutting edge of the cutting tool 13 becomes unnecessary. Also, by arranging at the same position, the cutting tool 13 can be stably fixed, such as locking the shank portion 29 with the lock mechanism 33. Incidentally, when the cutting tool 13 inserts the shank portion 29 into the insertion hole 31 in the normal attachment state, the shank portion 29 may contact the bottom of the insertion hole 31 or the like with the sleeve 32 and the flange portion 28 separated from each other, and be positioned with respect to the tool holder 12.

[0050] On the other hand, Figure 9 shows an incorrect mounting state in which the first cutting tool 13B is attached to the first mounting portion 22A. As shown in Figure 9, when the first cutting tool 13B is incorrectly attached to the first mounting portion 22A, the plate 49 is located at the position corresponding to the second screw member 51 (in this case, position 2). Therefore, when the first cutting tool 13B is attached, the plate 49 engages with the second screw member 51, i.e., an incorrect mounting state occurs. The engagement between the plate 49 and the second screw member 51 creates a gap 65 in the axial direction between the flange portion 28 (cutting tool mounting member 41) and the sleeve 32. As a result, for example, the shank portion 29 does not reach the locking mechanism 33, or the claws of the locking mechanism 33 do not enter the engaged portion of the shank portion 29.

[0051] Therefore, in this embodiment, if the shank portion 29 of the plate 49 is inserted into the insertion hole 31 and is incorrectly installed, it engages with the second screw member 51, forming a gap 65 between the opening of the insertion hole 31 and the flange portion 28, making it difficult to fix the shank portion 29 by the locking mechanism 33. As a result, the user can notice the installation error because of the gap 65 and the resulting looseness. Furthermore, since the locking mechanism 33 does not function and fixing becomes difficult, the occurrence of installation errors can be physically suppressed. Preferably, the gap 65 formed by the fixing bolt 63 and the second screw member 51 is a gap that prevents the locking mechanism 33 from functioning as described above, for example, a gap of 3 mm.

[0052] Furthermore, multiple plate mounting portions 53 are formed on the outer circumferential surface of the cutting tool mounting member 41, to which a plate 49 can be detachably attached. This allows for various combinations to be realized by changing the position of the plate 49. The user decides on the cutting tool 13 to be used and the holder number (identification information of the holder mounting portion 11A, or the first and second mounting portions 22A to 22D) to which the cutting tool 13 will be attached. The user determines a pattern for each combination of tool type and holder number, and attaches the plate 49 to the cutting tool mounting member 41. In this way, by changing the pattern of the combination of the plate 49 and the second screw member 51, it is possible to ensure that any cutting tool 13 can only be attached to a specific mounting portion. Also, if the user wants to change the pattern of the plate 49 or the second screw member 51 in accordance with changes in workpiece type or tool type, the plate 49 can be removed and modified.

[0053] Furthermore, the cutting tool mounting member 41 is a regular octagon and has eight planes on its outer surface. Depending on which of the multiple planes of the cutting tool mounting member 41 the plate 49 is attached to, the state of the plate 49 is changed, and when attempting to attach the cutting tool 13 to the tool holder 12, it is determined whether it is incorrectly attached or correctly attached. In this way, by forming eight planes on the cutting tool mounting member 41, the attachment position of the plate 49 can be clearly defined. By attaching the plate 49 to the correct position, it can function properly as an engagement part.

[0054] Furthermore, the second threaded member 51 in this embodiment is a member that is screwed into the tool holder 12. The sleeve 32 is provided with a threaded hole 32D into which the first threaded member 35 is screwed. Each of the multiple plate mounting portions 53 is positioned to correspond to the position of the threaded hole 32D when the cutting tool 13 is attached to the tool holder 12. In the incorrect mounting state, the plate 49 and the second threaded member 51 engage. In this configuration, the second threaded member 51 can function as a member that fixes the sleeve 32 and also as an engaged portion that engages with the plate 49. In addition, the threaded hole 32D used in the first threaded member 35 can be reused as the threaded portion into which the second threaded member 51 is attached.

[0055] Furthermore, the sleeve 32 is attached to the opening of the insertion hole 31 of the tool holding portion 21. The insertion hole portion 32A of the sleeve 32 has a through hole formed therein, which has a hole shape that matches the outer circumference shape of the shank portion 29 of the cutting tool 13. The second screw member 51 is a member that fixes the sleeve 32 to the tool holder 12. With this, the orientation of the cutting tool 13 can be limited by the shape of the hole in the insertion hole portion 32A. If the cutting tool 13 could be inserted into the insertion hole portion 32A at any rotational position, then, as in the example of the first cutting tools 13A and 13B described above, in a combination in which the plate 49 at the opposite position by 180 degrees is removed from the cutting tool mounting member 41, there is a risk that either cutting tool 13 could be attached to the first mounting portion 22A. In contrast, the shape of the hole in the insertion hole 32A and the projection 32C restrict the orientation of the cutting tool 13 relative to the first and second mounting portions 22A to 22D. This allows the plate 49 to engage with the second screw member 51 in an incorrectly mounted state, while preventing the plate 49 from engaging with the second screw member 51 in a correctly mounted state. In other words, the plate 49 and the second screw member 51 can function appropriately as components that indicate a mounting error.

[0056] (Regarding the indicator member 47) By using the plate 49 of the cutting tool mounting member 41 described above and the second screw member 51 of the tool holder 12, the occurrence of errors in mounting the cutting tool 13 can be suppressed. However, even with the same holder mounting portion 11A or mounting portion (first and second mounting portions 22A to 22D), if the type of workpiece to be machined is changed, the type of cutting tool 13 to be mounted also needs to be changed. Therefore, the cutting tool mounting member 41 of this embodiment can be classified by type of workpiece by attaching the indicator member 47.

[0057] As shown in Figures 6 and 7, an indicator member 47 is attached to the end face 71 of the cutting tool mounting member 41 in the axial direction. The end face 71 is the portion of the two opposing end faces of the cutting tool mounting member 41 that faces each other in the axial direction, and is the face that faces the tip 23. The end face 71 has, for example, a substantially annular-shaped plane. Multiple screw holes 73 for attaching the indicator member 47 are formed in the end face 71. The multiple screw holes 73 are formed, for example, at equal intervals in the circumferential direction, and a total of eight are formed.

[0058] On the other hand, the support member 47 is an annular-shaped member with multiple screw holes 75 formed therein. The width 76 of the support member 47 in the radial direction is approximately the same as the width of the end face portion 71. Therefore, when the support member 47 is attached to the end face portion 71, the entire end face is covered by the support member 47. The multiple screw holes 75 are formed at positions with the same pitch as the screw holes 73 in the circumferential direction, and penetrate the support member 47, with a total of eight holes formed. The support member 47 is fixed to the end face portion 71 by screwing multiple screws 77 into each of the multiple screw holes 73, 75.

[0059] As shown by the hatching in Figure 6, for example, the outer surface of the support member 47 is colored. In the example shown in Figure 6, a different color is applied to each 90-degree range in the circumferential direction, resulting in a total of four colors (for example, red, blue, yellow, and white). Note that in Figure 7, the color of the support member 47 is omitted to avoid making the drawing too complex.

[0060] By attaching the indicator member 47 configured in this way to the cutting tool mounting member 41, the cutting tool mounting member 41 can be classified, that is, the cutting tools 13 at the same mounting position can be classified. The indicator member 47 can then indicate the type of workpiece to be machined. For example, a cutting tool 13 (cutting tool mounting member 41) to which an indicator member 47 that is entirely red is attached can be designated as the cutting tool 13 for workpiece A. Thus, when machining workpiece A, the user prepares a cutting tool 13 with a red cutting tool mounting member 41 attached. The user can then determine the mounting position of the cutting tool 13 using the cutting tool mounting member 41 and attach the cutting tool 13. The cutting tool 13 can be quickly changed in accordance with setup changes to change the workpiece to be machined.

[0061] Similarly, for example, a cutting tool 13 to which indicator members 47 colored red, blue, yellow, and white are attached from predetermined positions in the circumferential direction is designated as the cutting tool 13 for workpiece B. This allows the user to quickly change the cutting tool 13 when machining workpiece B by preparing and attaching a cutting tool 13 to which red, blue, yellow, and white cutting tool mounting members 41 are attached. Therefore, the user can quickly change setups by increasing the number of color combinations and preparing cutting tool mounting members 41 and cutting tools 13 as the number of workpiece types to be machined increases. Even if the same cutting tool mounting members 41 are attached to the cutting tool 13, it is easy to determine which workpiece the cutting tool 13 is for.

[0062] The method of using the indicator member 47 described above is merely an example. The indicator member 47 may also be used in other ways to classify the cutting tool mounting member 41 and the cutting tool 13. For example, multiple colors of the indicator member 47 may be associated with one type of workpiece. Alternatively, the order in which the workpieces are processed may be associated with the color of the indicator member 47.

[0063] Incidentally, the correspondence between the terms used in the first embodiment and the terms used in the claims will be explained below. In this embodiment, the holder mounting portion 11A and the tool holder 12 are examples of holders. The tip 23 is an example of a cutting tool. The screw hole 32D is an example of a screwed portion. The plate 49 is an example of an engaging portion. The second screw member 51 is an example of a screwed portion and a screw member.

[0064] As described above, the first embodiment provides the following effects. In one aspect of the first embodiment, when the cutting tool mounting member 41 is attached to the flange portion 28 and the cutting tool 13 is attached to the tool holder 12, depending on the state of the plate 49 provided on the cutting tool mounting member 41, the plate 49 and the second screw member 51 may be in an incorrect mounting state where they engage, or in a correct mounting state where they do not engage.

[0065] According to this, by attaching the cutting tool mounting member 41 to the flange portion 28 of the cutting tool 13, the cutting tool mounting member 41 will be in an incorrect mounting state or a correct mounting state depending on the state of the plate 49 provided on the cutting tool mounting member 41. Therefore, if the state of the plate 49 of the cutting tool mounting member 41 is set to correspond to the correct type of cutting tool 13 and the mounting position of the cutting tool 13, the user can confirm whether the type of cutting tool 13 and the mounting position are correct by whether or not the plate 49 and the second screw member 51 engage. The user can notice the mounting error when the engagement occurs, and thus prevent the occurrence of machining errors. Furthermore, the cutting tool mounting member 41 can be attached to the flange portion 28 of the cutting tool 13 and can be attached to cutting tools 13 that are currently owned or newly purchased. Therefore, it does not require machining of the cutting tool 13 or tool holder 12, and it is possible to suppress the increase in costs due to measures to prevent mounting errors.

[0066] (Second Embodiment) Next, a second embodiment of the present disclosure will be described. In the first embodiment described above, the "state of the engaging portion" of the present disclosure was changed by whether or not the plate 49 was attached. In contrast, the second embodiment differs from the first embodiment in that the "state of the engaging portion" is changed by changing the shape of the plate 49 to be attached and the second screw member 51.

[0067] Figure 10 shows the cutting tool mounting member 141 of the second embodiment. In the following description of the second embodiment and subsequent embodiments, the same reference numerals are used for components identical to those in the first embodiment described above, and their descriptions are omitted as appropriate. As shown in Figure 10, the plate 149 attached to the cutting tool mounting member 141 of the second embodiment is shorter than the plate mounting portion 53 in the axial direction. When the first cutting tool 13A is attached to the first mounting portion 22A, a gap 81 is formed between the plate 149 and the plate portion 32B of the sleeve 32 in the axial direction. In addition, the head of the second screw member 151 of the second embodiment is larger than that of the second screw member 51 of the first embodiment.

[0068] Thus, the "state of engagement" can be changed by changing the length of the plate 149 in the axial direction (gap 81) or the size of the head of the second screw member 151. For example, the length of the plate 149 can be used to adjust whether or not it engages with the second screw member 151. Similarly, the height of the head of the second screw member 151 (axial length) can be used to adjust whether or not it engages with the plate 149.

[0069] Alternatively, for example, a recess may be formed on the plate 149 on the side of the second screw member 151, and the head of the second screw member 151 may be inserted into the recess. In this case, the size (radius) of the head of the second screw member 151 may be changed to adjust whether or not it engages with the recess of the plate 149. Alternatively, the shape of the recess of the plate 149 may be changed to adjust whether or not it engages with the second screw member 151. Or, the thickness (radial length) of the plate 149 may be used to adjust whether or not it engages.

[0070] Accordingly, in the second embodiment, the cutting tool mounting member 141 has a "state of engagement" that changes depending on the combination of the shape of the plate 149 and the shape of the head of the second screw member 151, so that when attempting to attach the cutting tool 13 to the first mounting part 22A, it will be either in an incorrect mounting state or in a correct mounting state. With this, the correct mounting state and the incorrect mounting state can be changed by the combination pattern of the length and thickness of the plate-shaped plate 149 and the shape of the head of the second screw member 151 (bolt, etc.).

[0071] Furthermore, the shapes of the second screw members 51, 151 and the plates 49, 149 do not necessarily indicate whether the installation is correct or incorrect. For example, the second screw members 51, 151 and the plates 49, 149 may be colored, and the combination of colors may indicate whether the installation is correct or incorrect. Alternatively, protrusions may be provided on the second screw members 51, 151 and the plates 49, 149 to switch the state of the engagement portion.

[0072] (Third Embodiment) Next, a third embodiment of the present disclosure will be described. The cutting tool mounting member 41 of the first embodiment described above was a substantially cylindrical member, but is not limited to this. As shown in Figure 11, the cutting tool mounting member 241 of the third embodiment differs from the cutting tool mounting member 41 of the first embodiment in that it has a notch 83 in a part of the circumferential direction. The cutting tool mounting member 141 is separated in the circumferential direction at the notch 83, and a gap is formed. Thus, the cutting tool mounting member 41 is not limited to an annular member, but may also be a member that is partially divided. Alternatively, the cutting tool mounting member of the present disclosure may be a U-shaped member that can be attached to a flange portion 28, etc. Furthermore, the cutting tool mounting member may be, for example, a rectangular plate-shaped member or a rod-shaped member having a through hole 43 into which a flange portion 28, etc. can be attached. Furthermore, the cutting tool mounting member may be composed of multiple members and assembled to a flange portion 28, etc. Therefore, the cutting tool mounting member of this disclosure can employ various configurations that engage with the second screw member 51 depending on the mounting position.

[0073] Furthermore, while the indicator member 47 in the first embodiment was a single disc-shaped member, it is not limited to this. The indicator member 147 in the second embodiment differs from the indicator member 47 in the first embodiment in that it is a member divided into four parts in the circumferential direction. The indicator member 147 is composed of separate members for each color assigned to the indicator member 147, and consists of four separate members of different colors. Each member of each color has an arc shape along the circumferential direction of the cutting tool mounting member 241. Each member of each color is fixed to the cutting tool mounting member 241 by screws 77, similar to the indicator member 47 in the first embodiment. In addition, the mounting positions of the four members can be swapped by removing the screws 77.

[0074] Accordingly, the indicator members 147 of the third embodiment are detachably attached to different positions on the cutting tool mounting member 241. The multiple members are colored differently, and the combination of positions and colors of the indicator members 147 attached to the cutting tool mounting member 241 can indicate the type of workpiece to be machined by the cutting tool 13 to which the cutting tool mounting member 241 is attached. This makes it possible to indicate the workpiece to be machined by the cutting tool 13 to which the cutting tool mounting member 241 is attached by the order in which the members of the indicator member 147 are arranged in the circumferential direction and the combination of colors. A wider variety of workpieces can be indicated by the combination of colors and positions. Note that the indicator member 147 is not limited to a member divided into four parts, but may also be a member divided into two or three parts. In addition, the indicator member 47 of the first embodiment may be divided into multiple parts.

[0075] It goes without saying that this disclosure is not limited to the embodiments described above, and various improvements and modifications are possible without departing from the spirit of this disclosure. For example, the configurations of the cutting tool mounting members 41, 141, 241, the indicator members 47, 147, the first mounting portion 22A, and the first cutting tool 13A in the embodiments described above are examples. For example, the plate portion 32B may be a circular (annular) plate without a cut-out portion (straight edge portion 37). In this case, the number and position of the screw holes 32D may be changed as appropriate. For example, eight screw holes 32D may be provided along the circumference of the plate portion 32B. The number and position of the plate mounting portion 53 on the cutting tool mounting member 41 may be changed to match the position of the screw holes 32D. Also, the flange portion 28 is not limited to a cylindrical shape, but may be a rectangular prism, triangular prism, disc shape, etc. In this case, the shape of the cutting tool mounting member 41 may be changed to match the shape of the flange portion 28.

[0076] Furthermore, the outer shape of the cutting tool mounting member 41 is not limited to a regular octagon; it may be other polygons, etc. Therefore, the number and position of the plate mounting portion 53 and the plate 49 can be changed as appropriate. Also, the outer shape of the cutting tool mounting member 41 may be circular. Therefore, the plate 49 may be fixed to the curved outer surface of the cutting tool mounting member 41.

[0077] Furthermore, the tool holder 12 may not have a sleeve 32. In this case, the second threaded member 51 may be directly screwed onto the end face 21A of the tool holding portion 21. Also, the engaged portion of this disclosure is not limited to a member that is screwed onto the tool holder 12, such as the second threaded member 51. For example, the engaged portion may be a pin fixed to the tool holder 12. The tool holder 12 may have a configuration that allows only one cutting tool 13 to be attached, for example, a configuration that has only one mounting portion.

[0078] Furthermore, the cutting tool mounting member 41 may not have an indicator member 47. Alternatively, the indicator member 47 may have letters indicating the color, such as RED, BLUE, YELLOW, or WHITE, instead of or in addition to the color. The indicator member 47 may also have letters indicating the type of workpiece, such as "For Workpiece A".

[0079] Furthermore, the configuration of the machine tool 10 in each of the above embodiments is merely an example. For example, the machine tool 10 is not limited to a lathe with a tool post, but may also be other types of processing equipment such as a machining center, milling machine, or drilling machine. Therefore, various machine tools capable of attaching a cutting tool 13 can be used as the machine tool 10 in this disclosure. In addition, the machine tool 10 may be a composite machine tool equipped with multiple types of processing equipment, such as a lathe and a machining center.

[0080] Furthermore, the scope of this disclosure is not limited to the dependencies described in the claims. For example, this specification also discloses a technical concept in which "the cutting tool mounting member described in claim 3" is changed to "the cutting tool mounting member described in claim 3 or claim 4" in claim 5. Also, for example, this specification also discloses a technical concept in which "the cutting tool mounting member described in claim 5" is changed to "the cutting tool mounting member described in claim 5 or claim 6" in claim 7. Also, for example, this specification also discloses a technical concept in which "the cutting tool mounting member described in claim 1 or claim 2" is changed to "the cutting tool mounting member described in any one of claims 1 to 7" in claim 8. Also, for example, this specification also discloses a technical concept in which "the cutting tool mounting member described in claim 1 or claim 2" is changed to "the cutting tool mounting member described in any one of claims 1 to 9" in claim 10. Furthermore, for example, this specification also discloses a technical concept in which "the cutting tool mounting member described in claim 1 or claim 2" is changed in claim 12 to "the cutting tool mounting member described in any one of claims 1 to 11".

[0081] 10 Machine tool, 11A Holder mounting part (holder), 12 Tool holder (holder), 23 Tip (cutting tool), 28 Flange part, 28A Groove, 29 Shank part, 31 Insertion hole, 32 Sleeve, 32D Threaded hole (threaded part), 33 Locking mechanism, 41, 141, 241 Cutting tool mounting member, 45 Threaded hole, 46 Fixing member, 47, 147 Indicator member, 49, 149 Plate (engaging part), 51, 151 Second threaded member (engaged part, threaded member), 53 Plate mounting part, 65 Gap.

Claims

1. A cutting tool mounting member that can be attached to the flange portion of a cutting tool for holding a cutting tool, wherein when the cutting tool mounting member is attached to the flange portion and the cutting tool is to be attached to the holder, depending on the state of the engaging portion provided on the cutting tool mounting member, the cutting tool mounting member may be in an incorrect mounting state in which the engaged portion on the holder and the engaging portion engage, or in a correct mounting state in which the engaged portion and the engaging portion do not engage.

2. The cutting tool mounting member according to claim 1, which is an annular ring along the outer circumference of the flange portion and is detachably attached to the flange portion.

3. The cutting tool mounting member according to claim 1 or claim 2, wherein the engaging portion is a plate-shaped plate, and a plurality of plate mounting portions are formed on the outer circumferential surface of the cutting tool mounting member, to which the engaging portion can be detachably attached.

4. The cutting tool mounting member according to claim 3, wherein each of the plurality of plate mounting portions has a plane formed on the outer circumferential surface of the cutting tool mounting member, the outer circumferential shape of the cutting tool mounting member is polygonal, and the state of the engaging portion provided on the cutting tool mounting member is changed depending on which of the planes of each of the plurality of plate mounting portions the engaging portion is attached to, and when attempting to attach the cutting tool to the holder, the state of incorrect attachment or correct attachment is changed.

5. The cutting tool mounting member according to claim 3, wherein the engaged portion is a threaded member that is screwed into the holder, the holder is provided with a threaded portion into which the threaded member is screwed, each of the plurality of plate mounting portions is positioned at a location corresponding to the position of the threaded portion when the cutting tool is attached to the holder, and the plate and the threaded member engage in the incorrect mounting state.

6. The cutting tool mounting member according to claim 5, wherein the state of the engaging portion is changed depending on the combination of the shape of the plate and the shape of the head of the screw member, and when attempting to attach the cutting tool to the holder, the state of incorrect attachment or the state of correct attachment is changed.

7. The cutting tool mounting member according to claim 5, wherein the holder has an insertion hole into which the cutting tool can be inserted, and a sleeve attached to the opening of the insertion hole, the cutting tool has a shank portion that is inserted into the insertion hole of the holder, the sleeve has a through hole formed in a hole shape that matches the outer circumference shape of the shank portion, and the screw member fixes the sleeve to the holder.

8. The cutting tool mounting member according to claim 1 or 2, wherein the holder has an insertion hole into which the cutting tool can be inserted, the cutting tool has a shank portion that is inserted into the insertion hole of the holder, the flange portion is formed to be larger in diameter than the shank portion, and when the shank portion of the cutting tool is inserted into the insertion hole in the normal mounting state, the flange portion contacts the opening of the insertion hole and is positioned relative to the holder.

9. The cutting tool mounting member according to claim 8, wherein the holder has a locking mechanism for fixing the shank portion of the cutting tool inserted into the insertion hole to the holder, and the engaging portion engages with the engaged portion when the shank portion is inserted into the insertion hole and in the incorrect mounting state, forming a gap between the opening of the insertion hole and the flange portion, making it difficult to fix the shank portion by the locking mechanism.

10. The cutting tool mounting member according to claim 1 or claim 2, wherein a groove is formed in the flange portion, and the cutting tool mounting member has a threaded hole that penetrates in the thickness direction, and the tip of a fixing member screwed into the threaded hole is fitted into the groove to fix it to the flange portion.

11. The cutting tool mounting member according to claim 10, wherein the flange portion is cylindrical in shape and has a pair of grooves, the pair of grooves are provided at positions offset by 180 degrees from each other in the circumferential direction of the flange portion, and the cutting tool mounting member is fixed to the flange portion by having a plurality of screw holes formed therein, the fixing member being screwed into each of the plurality of screw holes, and the fixing members being fitted into each of the pair of grooves.

12. The cutting tool mounting member according to claim 1 or claim 2, wherein the cutting tool mounting member has an indicator member that indicates the type of workpiece to be machined.

13. The cutting tool mounting member according to claim 12, wherein the indicator members are detachably attached to different positions on the cutting tool mounting member, the plurality of indicator members are colored, and the combination of the position and color of the indicator members attached to the cutting tool mounting member indicates the type of workpiece to be processed by the cutting tool to which the cutting tool mounting member is attached.

14. A holder capable of mounting a cutting tool, wherein the cutting tool holds a cutting tool, and a cutting tool mounting member can be attached to the flange portion of the holder, and the holder is provided with an engaging portion, and when the cutting tool mounting member is attached to the flange portion and an attempt is made to mount the cutting tool, depending on the state of the engaging portion provided on the cutting tool mounting member, the holder can be in a state of incorrect mounting where the engaging portion and the engaging portion are engaged, or in a state of correct mounting where the engaging portion and the engaging portion are not engaged.

15. A machine tool to which a holder can be attached, wherein a cutting tool can be attached to the holder, the cutting tool holds a cutting tool, and a cutting tool mounting member can be attached to the flange portion of the machine tool, and when the machine tool attempts to attach the cutting tool mounting member to the flange portion and attach the cutting tool to the holder, depending on the state of the engaging portion provided on the cutting tool mounting member, the machine tool may be in a state of incorrect attachment where the engaged portion on the holder and the engaging portion engage, or in a state of correct attachment where the engaged portion and the engaging portion do not engage.

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