Centering jig

Abstract

To realize a centering jig which enables a shape of a tool to be accurately detected by a tool pre-setter.SOLUTION: A centering jig (1) according to one embodiment of the disclosure includes: a housing (5) which covers a floating folder (3) in a state that the floating folder (3) fixed to a tool pre-setter (2) penetrates through the housing (5); a first collet mechanism (6) which performs centering of a center axis of a body part (3a) of the floating folder (3) fixed to the tool pre-setter (2) and a center axis of the housing (5); and a second collet mechanism (7) which performs centering of a center axis of a floating part (3b) of the floating folder (3) fixed to the tool pre-setter (2) and the center axis of the housing (5). The first collet mechanism (6) and the second collet mechanism (7) enables centering at preset concentricity.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a centering tool. [Background technology]

[0002] For example, Patent Document 1 discloses a machining center that engages a first centering jig attached to the spindle head with a second centering jig attached to the tool holder to center the spindle head relative to the tool holder, and stores the position of the spindle head relative to the tool holder in a centered state, thereby making it possible to position the spindle head in an appropriate position relative to a tool when replacing the tool using the tool holder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 59107 Summary of the Invention [Problem to be solved by the invention]

[0004] The applicant has found the following problem. In general, the shape of a tool such as a tap or reamer fixed to a floating folder is detected by imaging the tool using a presetter. In this case, if the tool is in a floating state due to the floating folder, the tool may be out of the imaging range of the presetter, and the tool shape may not be detected properly.

[0005] The present disclosure has been made in consideration of such problems, and realizes a centering jig that can bring the shape of a tool into a state where it can be suitably detected by a presetter. [Means for solving the problem]

[0006] A centering jig according to one aspect of the present disclosure is a centering jig used to center a tool when detecting a shape of a tool fixed to a floating folder by a presetter, a housing that covers the floating folder fixed to the presetter in a state where the floating folder penetrates the housing; a first collet mechanism supported by the housing and configured to center a central axis of the body of the floating folder fixed to the presetter with a central axis of the housing; a second collet mechanism that is supported by the housing, is capable of floating with respect to a body portion of the floating folder fixed to the presetter, and performs centering between a central axis of the floating portion to which the tool is fixed and a central axis of the housing; Equipped with The first collet mechanism and the second collet mechanism are capable of being centered with a preset concentricity. Effect of the Invention

[0007] According to the present disclosure, it is possible to realize a centering jig that can make the shape of a tool well detectable by a presetter. [Brief description of the drawings]

[0008] [Figure 1] 1 is a partial cross-sectional view showing a state in which a tool is centered using the centering jig of the embodiment; [Diagram 2] 13 is a diagram for explaining the configuration of a portion on the Z-axis negative side of the centering jig according to the embodiment. FIG. [Diagram 3] 13 is a diagram for explaining the configuration of a portion on the Z-axis + side of the centering jig according to the embodiment. FIG. [Figure 4] 13 is a diagram showing a state in which a floating folder with a tool fixed thereto is inserted into an insertion portion of a presetter and fixed therein. FIG. [Diagram 5] 13 is a diagram showing a state in which a floating folder to which a tool is fixed is passed through an internal space of a centering jig. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, specific embodiments to which the present disclosure is applied will be described in detail with reference to the drawings. However, the present disclosure is not limited to the following embodiments. In addition, in order to clarify the description, the following description and drawings are appropriately simplified. Here, in the following description, in order to clarify the description, a three-dimensional (XYZ) coordinate system is used.

[0010] First, the configuration of the centering jig of this embodiment will be described. Fig. 1 is a partial cross-sectional view showing how a tool is centered using the centering jig of this embodiment. Fig. 2(a) is a partial cross-sectional view for explaining the configuration of the Z-axis -side portion of the centering jig of this embodiment, and Fig. 2(b) is a perspective view of the Z-axis -side portion of the centering jig of this embodiment as viewed from the Z-axis -side. Figure 3(a) is a partial cross-sectional view for explaining the configuration of the Z-axis + side portion of the centering jig of this embodiment, and Figure 3(b) is an oblique view of the Z-axis + side portion of the centering jig of this embodiment as viewed from the Z-axis + side. Here, in Figures 2(a) and 3(a), the left side shows a state in which the collet part is disposed on the negative side of the Z axis, and the right side shows a state in which the collet part is disposed on the positive side of the Z axis. Note that in Figures 1, 2(a) and 3(a), some cross-sectional hatching has been omitted to clarify the drawings, and the presetter, floating folder and tools are shown by virtual lines.

[0011] The centering jig 1 of this embodiment is suitable for detecting shapes such as effective diameter, thread height, pitch, etc. of a tool 4 such as a tap or reamer fixed to the end of the floating folder 3 on the + side of the Z axis with the imaging device of the presetter 2, when the end of the floating folder 3 on the - side of the Z axis is inserted and fixed into the insertion portion 2a of the presetter 2, as shown in Figure 1. Since the presetter 2 is not an essential part of this disclosure, detailed description will be omitted, but the imaging device is configured to detect the shape of the tool 4 by synthesizing imaging data of the tool 4 acquired by rotating around a central axis extending in the Z-axis direction at the insertion portion 2a of the presetter 2. In this way, in order to detect the shape of the tool 4 by combining the imaging data of the tool 4 acquired by the imaging device rotating around the central axis of the insertion portion 2a of the presetter 2, the central axis of the tool 4 needs to be positioned within a predetermined range relative to the central axis of the insertion portion 2a of the presetter 2 (i.e., the rotation axis of the imaging device).

[0012] The floating folder 3 is not an essential part of the present disclosure, and therefore will not be described in detail, but as shown in Fig. 1, the floating folder 3 includes a body portion 3a and a floating portion 3b. The body portion 3a extends in the Z-axis direction, and, for example, multiple cylindrical portions are stacked concentrically in the Z-axis direction. In other words, the outer peripheral shape of the body portion 3a is circular when viewed from the Z-axis direction. At this time, when the floating folder 3 is fixed to the presetter 2, the step portion 3c on the Z-axis - side of the part of the floating folder 3 that protrudes from the insertion portion 2a of the presetter 2 to the Z-axis + side is a flat surface of approximately circular ring shape that is approximately parallel to the XY plane, and protrudes radially outward from the body portion 3a of the floating folder 3 relative to the other step portions. The floating part 3b is disposed on the Z-axis + side relative to the body part 3a, and is configured to be able to float relative to the body part 3a in a direction perpendicular to the central axis of the body part 3a. The floating part 3b is provided with a chuck part 3d for fixing the tool 4 to the end part on the Z-axis + side of the floating part 3b. When the tool 4 is fixed to the floating part 3b, the central axis of the tool 4 is disposed approximately on the central axis of the floating part 3b.

[0013] As shown in Figure 1, the centering jig 1 comprises a housing 5, a first collet mechanism 6, and a second collet mechanism 7, and is positioned so as to cover the outer side surface of the floating folder 3 fixed to the presetter 2 when the floating folder 3 is passed through the inside of the centering jig 1. As shown in Figure 1, the housing 5 is shaped so that it can cover the portion of the floating folder 3 that protrudes from the insertion portion 2a of the presetter 2 toward the Z-axis + side when the floating folder 3 fixed to the presetter 2 is passed inside the centering jig 1. 1, the housing 5 includes a tubular portion 5a and a cover portion 5b. The tubular portion 5a has a basic cylindrical shape extending in the Z-axis direction, and the end portion of the tubular portion 5a on the Z-axis + side is a flat surface approximately parallel to the XY plane.

[0014] The cylindrical portion 5a may have openings 5c formed at intervals in the circumferential direction of the cylindrical portion 5a. The openings 5c can be used, for example, to confirm that the housing 5 is placed on the step portion 3c of the body portion 3a of the floating folder 3, as described later. However, the openings 5c may be omitted. The height of the tubular portion 5a in the Z-axis direction is approximately equal to the height of the portion of the body portion 3a of the floating folder 3 that protrudes from the insertion portion 2a of the presetter 2 to the Z-axis + side when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1, as shown in Figure 1, for example.

[0015] As shown in Figure 1, the cylindrical portion 5a has an internal space capable of accommodating the portion of the floating folder 3 that protrudes from the insertion portion 2a of the presetter 2 in the body portion 3a of the floating folder 3 toward the Z-axis + side when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1. In other words, the cylindrical portion 5a is shaped so that, when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1, as shown in Figure 1, it is possible to cover the outer peripheral side surface of the portion of the body portion 3a of the floating folder 3 that protrudes from the insertion portion 2a of the presetter 2 toward the Z-axis + side.

[0016] 1 and 2(a), a step portion 5d is formed on the Z-axis negative side of the inner peripheral side surface of the cylindrical portion 5a. The step portion 5d is placed on the step portion 3c of the body portion 3a of the floating folder 3 when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1. The step portion 5d is a flat surface having a substantially circular ring shape that is substantially parallel to the XY plane. A male thread portion 5e is formed on the negative side of the Z axis of the outer peripheral side surface of the cylindrical portion 5a, as shown in Figures 1 and 2(a). Also, a cone-shaped inclined surface (first inclined surface) 5f, which decreases in diameter toward the positive side of the Z axis, is formed on the negative side of the Z axis of the step portion 5d on the inner peripheral side surface of the cylindrical portion 5a, as shown in Figures 1 and 2(a). The central axis of the inclined surface 5f is approximately aligned with the central axis of the housing 5.

[0017] As shown in Fig. 1 and Fig. 3(a), the cover portion 5b is fixed to the end portion of the cylindrical portion 5a on the Z-axis + side. The cover portion 5b includes a cylindrical portion 5g and a flange portion 5h. The cylindrical portion 5g has a basic cylindrical shape extending in the Z-axis direction, and the end portion of the cylindrical portion 5g on the Z-axis + side is a flat surface approximately parallel to the XY plane. The height in the Z-axis direction of the tubular portion 5g may be lower than the height in the Z-axis direction of the floating portion 3b of the floating folder 3 when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1, for example, as shown in Figures 1 and 3(a). Specifically, the height in the Z-axis direction of the tubular portion 5g may be set to a height at which, when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1, the fitting portion 3e into which a tool for attaching and detaching the tool 4 in the floating folder 3 is fitted is exposed, as shown in Figures 1 and 3(a).

[0018] As shown in Figures 1 and 3(a), the cylindrical portion 5g has an internal space capable of accommodating the Z-axis -side portion of the floating portion 3b of the floating folder 3 when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1. In other words, as shown in Figures 1 and 3(a), the tubular portion 5g is shaped so that it can cover the outer peripheral side surface of the Z-axis -side portion of the floating portion 3b of the floating folder 3 when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1. 1 and 3(a), the cylindrical portion 5g has a cone-shaped inclined surface (second inclined surface) 5i on the inner peripheral side surface on the negative side of the Z axis, the diameter of which decreases toward the positive side of the Z axis. The central axis of the inclined surface 5i is located approximately on the central axis of the housing 5.

[0019] 1 and 3(a), the flange portion 5h protrudes from the end portion on the negative side of the Z axis of the cylindrical portion 5g toward the radially outer side of the cylindrical portion 5g and has a substantially annular shape when viewed from the Z axis direction. The end portion on the negative side of the Z axis of the flange portion 5h is a flat surface substantially parallel to the XY plane and is in substantially surface contact with the end portion on the positive side of the Z axis of the cylindrical portion 5a. 1 and 3(a), the flange portion 5h is fixed to the end portion of the cylindrical portion 5a on the Z-axis + side via a fastening member 8 such as a bolt. At this time, the central axis of the cylindrical portion 5a and the central axis of the cylindrical portion 5g of the cover portion 5b are approximately aligned with the central axis of the housing 5.

[0020] The first collet mechanism 6 aligns the central axis of the body portion 3a of the floating holder 3 with the central axis of the housing 5. As shown in Figures 1, 2(a) and 2(b), the first collet mechanism 6 includes a collet portion 6a, a nut 6b and a retaining ring 6c. Here, the following description of the configuration of the first collet mechanism 6 is based on the premise that the collet portion 6a is not contracted.

[0021] The collet portion 6a includes a cylindrical portion 6d and a flange portion 6e. As shown in Fig. 1 and Fig. 2(a) and (b), the cylindrical portion 6d has a basic cylindrical shape extending in the Z-axis direction, and the end portion of the cylindrical portion 6d on the negative side of the Z-axis is a flat surface approximately parallel to the XY plane. The inner peripheral side surface of the cylindrical portion 6d is approximately parallel to the XZ plane. The cylindrical portion 6d is disposed on the negative Z-axis side of the step portion 5d in the internal space of the cylindrical portion 5a of the housing 5, and the negative Z-axis side portion of the cylindrical portion 6d protrudes from the housing 5 to the negative Z-axis side. As shown in the left diagram of Figure 2(a), the inner diameter of the cylindrical portion 6d is slightly larger than the outer diameter of the portion of the body portion 3a of the floating folder 3 that is located in the internal space on the Z-axis - side relative to the step portion 5d of the cylindrical portion 5a of the housing 5 when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1. Therefore, as shown in the left diagram of Figure 2(a), when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1, a gap G1 is formed between the inner side surface of the cylindrical portion 6d and the outer side surface of the portion of the body portion 3a of the floating folder 3 that is positioned in the internal space on the Z-axis - side relative to the step portion 5d of the cylindrical portion 5a of the housing 5. As shown in Figures 1 and 2(a), a conical inclined surface 6f is formed on the outer peripheral side of the cylindrical portion 6d, the diameter of which decreases toward the Z-axis + side, and the inclined surface 6f is in approximate surface contact with the inclined surface 5f of the cylindrical portion 5a of the housing 5.

[0022] As shown in Figures 1 and 2(a) and (b), the flange portion 6e protrudes radially outward from the end of the cylindrical portion 6d on the Z-axis negative side, and has a substantially circular ring shape when viewed from the Z-axis direction. The negative end of the flange portion 6e on the Z-axis side is a flat surface substantially parallel to the XY plane and is continuous with the negative end of the cylindrical portion 6d on the Z-axis side. In this case, the outer peripheral edge of the flange portion 6e is preferably disposed radially inward of the cylindrical portion 5a with respect to the outer peripheral edge of the negative end of the cylindrical portion 5a on the Z-axis side of the housing 5 when viewed from the Z-axis direction.

[0023] As shown in Fig. 2(b), the collet portion 6a has cutouts 6g extending in the Z-axis direction at approximately equal intervals in the circumferential direction of the collet portion 6a. The cutouts 6g may include, for example, a slit formed to break the circumferential continuity of the collet portion 6a and a plurality of grooves formed on the inner peripheral side surface of the collet portion 6a. However, it is sufficient that the cutouts 6g are formed in the collet portion 6a so that the collet portion 6a can be reduced in diameter in the radial direction.

[0024] 1 and 2(a), the nut 6b includes a tubular portion 6h and a flange portion 6i. The tubular portion 6h has a basic cylindrical shape extending in the Z-axis direction, and a female thread portion 6j is formed on the inner peripheral side surface of the tubular portion 6h. 1 and 2(a), the female thread portion 6j is screwed into the male thread portion 5e of the cylindrical portion 5a of the housing 5. At this time, with the female thread portion 6j screwed into the male thread portion 5e of the cylindrical portion 5a of the housing 5, the end portion on the negative Z-axis side of the cylindrical portion 6h protrudes from the end portion on the negative Z-axis side of the housing 5. The flange portion 6i protrudes from the end portion on the negative side of the Z axis of the cylindrical portion 6h toward the radial inside of the cylindrical portion 6h, and has a substantially annular shape when viewed from the Z axis direction. The end portion on the positive side of the Z axis of the flange portion 6i is a flat surface substantially parallel to the XY plane, and is in substantially surface contact with the negative end portion of the Z axis of the flange portion 6e of the collet portion 6a arranged between the flange portion 6i and the end portion on the negative side of the Z axis of the housing 5.

[0025] The retaining ring 6c is a ring member engaged with a groove portion 6k formed on the inner peripheral surface of the cylindrical portion 6h of the nut 6b, and the retaining ring 6c and the flange portion 6i of the nut 6b sandwich the flange portion 6e of the collet portion 6a in the Z-axis direction.

[0026] In such a first collet mechanism 6, when the nut 6b is rotated in one direction from the state shown in the left diagram of Figure 2(a) to move it toward the + side of the Z axis relative to the housing 5, the collet portion 6a moves toward the + side of the Z axis via the flange portion 6i of the nut 6b, as shown in the right diagram of Figure 2(a). At this time, since the inclined surface 6f of the collet portion 6a is in approximate surface contact with the inclined surface 5f of the cylindrical portion 5a of the housing 5 and a notch portion 6g is formed in the collet portion 6a, the diameter of the collet portion 6a decreases as it moves toward the Z-axis + side. On the other hand, in the first collet mechanism 6, when the nut 6b is rotated in the other direction from the state shown in the right diagram of Fig. 2(a) to move it toward the negative side of the Z axis with respect to the housing 5, the collet part 6a moves toward the negative side of the Z axis via the retaining ring 6c and enters a non-reduced diameter state, as shown in the left diagram of Fig. 2(a). In other words, the flange part 6i and the retaining ring 6c of the nut 6b of the first collet mechanism 6 function as a transmission part that transmits the movement of the nut 6b in the Z axis direction to the collet part 6a.

[0027] The second collet mechanism 7 aligns the central axis of the floating portion 3b of the floating holder 3 with the central axis of the housing 5. As shown in Figures 1 and 3(a) and (b), the second collet mechanism 7 includes a collet portion 7a and a nut 7b. Here, the following description of the configuration of the second collet mechanism 7 is based on the premise that the collet portion 7a is not contracted.

[0028] The collet portion 7a includes a cylindrical portion 7c, a flange portion 7d, and an inclined portion 7e. As shown in Fig. 1 and Fig. 3(a) and (b), the cylindrical portion 7c has a basic cylindrical shape extending in the Z-axis direction. 1 and 3(a), the cylindrical portion 7c is inserted into the internal space of the cover portion 5b of the housing 5, and the Z-axis + side portion of the cylindrical portion 7c protrudes toward the Z-axis + side from the housing 5. A male thread portion 7f is formed on the outer circumferential side surface of the cylindrical portion 7c at the end portion on the Z-axis + side of the cylindrical portion 7c. The inner diameter of the cylindrical portion 7c is larger than the outer diameter of the portion of the floating folder 3 that is inserted into the internal space of the covering portion 5b of the housing 5 when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1, as shown in the left diagram of Figures 1 and 3(a).

[0029] 1 and 3(a), the flange portion 7d protrudes from the end of the cylindrical portion 7c on the negative Z-axis side toward the radially inner side of the cylindrical portion 7c and has a substantially annular shape when viewed from the Z-axis direction. The inner peripheral side surface of the flange portion 7d is disposed substantially parallel to the XZ plane. The inner diameter of the flange portion 7d is slightly larger than the outer diameter of the portion of the floating portion 3b of the floating folder 3 that is positioned in the internal space of the covering portion 5b of the housing 5 when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1, as shown in the left diagram of Figure 3(a). Therefore, as shown in the left diagram of Figure 3(a), a gap G2 is formed between the inner side surface of the flange portion 7d and the outer side surface of the portion of the floating portion 3b of the floating folder 3 that is positioned in the internal space of the covering portion 5b of the housing 5 when the floating folder 3 fixed to the presetter 2 is passed through the centering jig 1.

[0030] 1 and 3(a), the inclined portion 7e protrudes from the end of the cylindrical portion 7c on the negative side of the Z axis toward the radially outer side of the cylindrical portion 7c, and has a substantially annular shape when viewed from the Z axis direction. A conical inclined surface 7g that decreases in diameter toward the positive side of the Z axis is formed on the outer circumferential side of the inclined portion 7e, and the inclined surface 7g is in substantially surface contact with the inclined surface 5i of the cover portion 5b of the housing 5. In this case, if the radially outer end of the inclined portion 7e is shaped to hang down toward the Z-axis negative side, as shown in Figures 1 and 3(a), a wide contact area can be secured between the inclined surface 7g of the inclined portion 7e and the inclined surface 5i of the cover portion 5b of the housing 5.

[0031] As shown in Fig. 3(b), the collet portion 7a has cutouts 7h extending in the Z-axis direction at substantially equal intervals in the circumferential direction of the collet portion 7a. The cutouts 7h may be, for example, keyhole-shaped slits formed to penetrate the collet portion 7a in the radial direction of the collet portion 7a and with the negative end of the Z-axis of the cutouts 7h open. However, it is sufficient that the cutouts 7h are formed in the collet portion 7a so that the collet portion 7a can be reduced in diameter in the radial direction.

[0032] 1 and 3(a) and (b), the nut 7b has a basic plate shape, and the surface of the nut 7b on the negative Z-axis side is a flat surface substantially parallel to the XY plane. The nut 7b is placed on the end of the housing 5 on the positive Z-axis side in a state in which the surface of the nut 7b on the negative Z-axis side is in surface contact with the end of the cylindrical portion 5g of the cover portion 5b in the housing 5 on the positive Z-axis side. That is, the nut 7b is supported on the end portion on the Z-axis + side of the housing 5. As shown in Fig. 1 and Fig. 3(a), a female thread portion 7i is formed on the inner peripheral side surface of the nut 7b, and the female thread portion 7i is screwed into the male thread portion 7f of the cylindrical portion 7c of the collet portion 7a.

[0033] In this second collet mechanism 7, when nut 7b is rotated in one direction from the state shown in the left diagram of Fig. 3(a), collet portion 7a moves toward the + side of the Z axis, as shown in the right diagram of Fig. 3(a). At this time, inclined surface 7g of collet portion 7a is in approximate surface contact with inclined surface 5i of cover portion 5b of housing 5, and since notch portion 7h is formed in collet portion 7a, the diameter of collet portion 7a decreases as it moves toward the + side of the Z axis. On the other hand, in the second collet mechanism 7, when the nut 7b is rotated in the other direction from the state shown in the right-hand diagram of Figure 3(a), the collet portion 7a moves to the Z-axis - side and enters a non-reduced diameter state, as shown in the left-hand diagram of Figure 3(a).

[0034] Next, a flow of centering the tool 4 fixed to the floating folder 3 using the centering jig 1 of this embodiment will be described. Here, Fig. 4 is a diagram showing a state in which the floating folder to which the tool is fixed is inserted into the insertion part of the presetter and fixed. Fig. 5 is a diagram showing a state in which the floating folder to which the tool is fixed is passed through the internal space of the centering jig.

[0035] First, as shown in Figures 1 and 4, an operator inserts the Z-axis negative side portion of the floating folder 3 to which the tool 4 is fixed into the insertion portion 2a of the presetter 2 and fixes it. At this time, the central axis of the body portion 3a of the floating folder 3 is approximately aligned with the central axis of the insertion portion 2a of the presetter 2. Also, the central axis of the tool 4 is approximately aligned with the central axis of the floating portion 3b of the floating folder 3.

[0036] Next, as shown in Figures 1 and 5, an operator passes the floating folder 3 to which the tool 4 is fixed through the internal space of the centering jig 1. This completes preparations for centering the tool 4. At this time, the step 5d of the housing 5 is placed on the step 3c of the body part 3a of the floating folder 3, and the centering jig 1 is supported by the floating folder 3. Here, if an opening 5c ​​is formed in the cylindrical portion 5a of the housing 5, a worker can easily confirm that the housing 5 is placed on the step portion 3c of the body portion 3a of the floating folder 3.

[0037] The nut 6b of the first collet mechanism 6 and the nut 7b of the second collet mechanism 7 are rotated to the other limit, and the collet portion 6a of the first collet mechanism 6 and the collet portion 7a of the second collet mechanism 7 are in a non-reduced diameter state. Therefore, as shown in the left diagram of Figure 2(a), a gap G1 is formed between the inner side surface of the cylindrical portion 6d of the collet part 6a in the first collet mechanism 6 and the outer side surface of the portion of the body part 3a of the floating holder 3 that is inserted into the internal space on the Z-axis - side relative to the step portion 5d of the cylindrical portion 5a of the housing 5. Furthermore, as shown in the left diagram of Figure 3(a), a gap G2 is formed between the inner peripheral side surface of the flange portion 7d of the collet portion 7a in the second collet mechanism 7 and the outer peripheral side surface of the portion of the floating portion 3b of the floating holder 3 that is inserted into the internal space of the cover portion 5b of the housing 5.

[0038] Next, the worker rotates the nut 6b of the first collet mechanism 6 in one direction to move it toward the + side of the Z axis relative to the housing 5, and moves the collet portion 6a toward the + side of the Z axis via the flange portion 6i of the nut 6b, as shown in the diagram on the right side of Figure 2(a). As described above, the inclined surface 6f of the collet portion 6a of the first collet mechanism 6 is in approximate surface contact with the inclined surface 5f of the cylindrical portion 5a of the housing 5, and the notch portion 6g is formed in the cylindrical portion 6d of the collet portion 6a. Therefore, as the collet portion 6a of the first collet mechanism 6 moves toward the Z-axis + side, it contracts in diameter and comes into contact with the portion inserted into the internal space on the Z-axis - side relative to the step portion 5d of the cylindrical portion 5a of the housing 5 in the body portion 3a of the floating folder 3, thereby tightening said portion.

[0039] At this time, since the floating folder 3 is fixed to the insertion portion 2a of the presetter 2, the centering jig 1 moves in the X-axis direction and the Y-axis direction so as to follow the arrangement position of the body portion 3a of the floating folder 3. The central axis of the housing 5 is approximately aligned with the central axis of the inclined surface 5f of the cylindrical portion 5a of the housing 5, and is therefore aligned with the central axis of the insertion portion 2a of the presetter 2. In other words, the central axis of the body portion 3a of the floating folder 3 is approximately aligned with the central axis of the housing 5 and is aligned with the central axis of the insertion portion 2a of the presetter 2. This results in a state in which the central axis of the body portion 3a of the floating folder 3 and the central axis of the housing 5 are aligned.

[0040] Next, the worker rotates the nut 7b of the second collet mechanism 7 in one direction to move the collet part 7a toward the + side of the Z axis, as shown in the right diagram of Fig. 3(a). As described above, the inclined surface 7g of the collet part 7a of the second collet mechanism 7 is in approximate surface contact with the inclined surface 5i of the cover part 5b of the housing 5, and the notch part 7h is formed in the cylindrical part 7c of the collet part 7a. Therefore, as the collet portion 7a of the second collet mechanism 7 moves toward the + side of the Z axis, it contracts in diameter and comes into contact with the portion of the floating portion 3b of the floating folder 3 that is inserted into the internal space of the cover portion 5b of the housing 5, tightening said portion.

[0041] At this time, since the housing 5 is fixed to the body portion 3a of the floating folder 3, the floating portion 3b of the floating folder 3 moves in the X-axis direction and the Y-axis direction so as to follow the arrangement position of the cover portion 5b of the housing 5. The central axis of the housing 5 is approximately aligned with the central axis of the inclined surface 5i of the cover portion 5b of the housing 5, and is also aligned with the central axis of the insertion portion 2a of the presetter 2. Therefore, the central axis of the floating portion 3b of the floating folder 3 is also approximately on the central axis of the housing 5 and is disposed on the central axis of the insertion portion 2a of the presetter 2. As a result, the central axis of the floating portion 3b of the floating folder 3 and the central axis of the housing 5 are aligned.

[0042] From the above, the central axis of the body portion 3a of the floating holder 3 and the central axis of the floating portion 3b are approximately aligned with the central axis of the insertion portion 2a of the presetter 2. Therefore, the first collet mechanism 6 and the second collet mechanism 7 of the centering jig 1 of this embodiment can center the central axis of the body portion 3a of the floating holder 3 and the central axis of the floating portion 3b with a preset concentricity (for example, 0.005 mm).

[0043] Thereafter, the imaging device of the presetter 2 is rotated around the central axis of the insertion portion 2a of the presetter 2 to obtain imaging data of the tool 4, and the imaging data is synthesized, whereby the shape of the tool 4 can be detected. At this time, as described above, the central axis of the floating portion 3b of the floating folder 3 is roughly positioned on the central axis of the insertion portion 2a of the presetter 2, and as a result, the central axis of the tool 4 is positioned within a preset concentricity with respect to the central axis of the insertion portion 2a of the presetter 2. Therefore, it is possible to prevent the tool 4 from going out of the imaging range of the imaging device of the presetter 2, and the shape of the tool 4 can be detected well by the presetter 2.

[0044] In this manner, the centering jig 1 of the present embodiment can bring the shape of the tool 4 into a state in which it is possible to satisfactorily detect the shape of the tool 4 by the presetter 2. Therefore, when the centering jig 1 of the present embodiment is used, it is possible to prevent the tool 4 from going out of the imaging range of the imaging device of the presetter 2, and the shape of the tool 4 can be satisfactorily detected by the presetter 2. Note that the configurations of the first collet mechanism 6 and the second collet mechanism 7 in this embodiment are merely examples, and it is sufficient that the configuration allows the central axis of the body portion 3a of the floating holder 3 and the central axis of the floating portion 3b to be centered with a predetermined concentricity.

[0045] The present disclosure is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit and scope of the present disclosure. [Explanation of symbols]

[0046] 1 Centering jig 2 Presetter 3 Floating folder, 3a Body part, 3b Floating part, 3c Step part 4 Tools 5 Housing, 5d Step, 5e Male thread, 5f Inclined surface, 5i Inclined surface 6 first collet mechanism, 6a collet part, 6b nut, 6f inclined surface, 6j female thread part 7 second collet mechanism, 7a collet part, 7b nut, 7f male thread part, 7g inclined surface, 7i female thread part

Claims

1. A centering jig used for centering a tool fixed to a floating folder when detecting the shape of the tool by a presetter, comprising: a housing that covers the floating folder fixed to the presetter in a state where the floating folder penetrates the housing; a first collet mechanism that is supported by the housing and that performs centering between a central axis of a body portion of the floating folder that is fixed to the presetter and a central axis of the housing; a second collet mechanism that is supported by the housing, is capable of floating with respect to a body portion of the floating folder fixed to the presetter, and performs centering between a central axis of the floating portion to which the tool is fixed and a central axis of the housing; Equipped with The first collet mechanism and the second collet mechanism can be centered at a preset concentricity.

2. The first collet mechanism includes: a cylindrical collet portion that is movably disposed between a body portion of the floating folder and the housing in a state in which the floating folder penetrates inside the housing, and that is contractible around the central axis of the housing; a nut having a female thread portion that is screwed into a male thread portion formed on an outer peripheral side surface of the housing; an inclined surface formed on an outer peripheral side surface of the collet portion and in contact with a first inclined surface formed on an inner peripheral side surface of the housing; a transmission portion that transmits movement of the nut relative to the housing in a central axis direction of the housing to the collet portion; Equipped with When the nut is rotated in one direction to move the nut relative to the housing in one direction of the central axis of the housing, the collet portion moves to one side in the central axis direction of the housing along the first inclined surface of the housing and reduces in diameter, 2. The centering jig of claim 1, wherein when the nut is rotated in the other direction to move the nut in the other direction of the central axis of the housing relative to the housing, the collet portion moves to the other side of the central axis of the housing in line with the first inclined surface of the housing and becomes in a non-reduced state.

3. The second collet mechanism includes: a cylindrical collet portion that is movably disposed between the floating portion of the floating folder and the housing in a state in which the floating folder penetrates the inside of the housing, and that is contractible in diameter around the central axis of the housing; a nut having a female thread portion that is screwed into a male thread portion formed on an outer peripheral side surface of the collet portion and supported by the housing; an inclined surface formed on an outer peripheral side surface of the collet portion and in contact with a second inclined surface formed on an inner peripheral side surface of the housing; Equipped with When the nut is rotated in one direction, the collet portion moves to one side in the central axis direction of the housing along the second inclined surface of the housing and reduces in diameter, The centering jig according to claim 1 or 2, wherein when the nut is rotated in the other direction, the collet portion moves to the other side in the central axis direction of the housing in accordance with the second inclined surface of the housing and becomes in a non-reduced diameter state.

4. The centering jig according to claim 1 or 2, wherein a step portion is formed on the inner peripheral side surface of the housing to be placed on a step portion formed in a body portion of the floating folder with the floating folder penetrating into the interior of the housing.

5. 5. The centering jig according to claim 4, wherein the housing has an opening formed therein for confirming a state in which the stepped portion of the housing is placed on the stepped portion of the body portion of the floating holder.

Images