JP7548571B2 - Tool installation aid - Google Patents

Description

The present invention relates to a tool attachment aid that assists in attaching a tool to a tool holder.

In a machine tool that uses a tool to machine a workpiece, the tool is attached to the spindle of the machine tool via a tool holder. In this case, if the attachment position of the tool relative to the tool holder is misaligned, the machining accuracy decreases. For this reason, it is necessary to accurately position the tool when attaching it to the tool holder.
2. Description of the Related Art Conventionally, a tool attachment assisting tool has been proposed in order to make it possible to easily attach a tool to a tool holder in a short time, as disclosed in Japanese Patent Application Laid-Open No. 2003-233691.

JP 2001-105283 A

The tool attachment support tool disclosed in Patent Document 1 sets the length of the tool protruding from the tip face of the tool holder, i.e., the distance between the tip face of the tool holder and the cutting edge of the cutting part of the tool (called the "tool protrusion length"). Therefore, the tool attachment support tool disclosed in Patent Document 1 can be used in a machine tool that rotates a tool to machine a workpiece.
On the other hand, in a machine tool that processes a workpiece with a fixed tool, it is necessary to set the phase of the tool relative to the tool holder (the phase of the cutting edge of the tool's blade), i.e., the position of the tool around the tool center line relative to the tool holder, so the tool attachment support tool disclosed in Patent Document 1 cannot be used for such a machine tool.
The present invention has been devised in view of the above-mentioned points, and has an object to provide a tool mounting assisting tool that can easily set the position of a tool about the center line of the tool relative to a tool holder.

The tool attachment aid of the present invention includes an annular member.
The annular member is formed by a first end face, a second end face, an outer peripheral surface, and an inner peripheral surface that defines an inner space. The first end face and the second end face are formed on one side and the other side along the extension direction of the center line of the annular member. The inner space opens to the first end face and the second end face and extends along the extension direction of the center line of the annular member.
The inner space has a first spatial portion and a second spatial portion. The second spatial portion is formed between the first spatial portion and the outer peripheral surface and extends along a direction intersecting the extending direction of the center line of the annular member. For example, the second spatial portion extends along a direction perpendicular to (including "approximately perpendicular to") the extending direction of the center line of the annular member.
The inner space is configured so that a tool shank of a tool can be inserted into and removed from the first space portion via the second space portion, and the tool shank is configured so as to be movable within the first space portion along the extending direction of the center line of the annular member.
The present invention further includes a first positioning mechanism and a second positioning mechanism. The first positioning mechanism sets the position (phase) of the tool shank portion inserted into the first space portion of the inner space of the annular member about the tool center line with respect to the annular member. For example, the first positioning mechanism is configured to be detachably attached to the annular member so that the position of the tool shank portion about the center line of the tool shank portion is set to a first position. The second positioning mechanism sets the position (phase) of the annular member about the center line of the annular member with respect to the tool holder. For example, the second positioning mechanism is configured to be detachably attached to the tool holder so that the position of the annular member about the center line of the annular member is set to a second position.
In the present invention, the first positioning mechanism sets the phase of the tool shank relative to the annular member, and the second positioning mechanism sets the phase of the annular member relative to the tool holder, making it possible to easily set the position of a tool having a tool shank about the tool center line relative to the tool holder.
The different aspects of the present invention can be used when mounting a tool having at least one flat surface formed on the outer peripheral surface of the tool shank portion and extending along the extension direction of the tool center line, to a tool holder.
This embodiment includes a first pressing member. The first pressing member is movable along a direction intersecting with the extension direction of the center line of the annular member, and has a pressing surface extending along a direction intersecting with the movement direction of the first pressing member. For example, the first pressing member is movable along a direction perpendicular (including "approximately perpendicular") to the center line of the annular member, and the pressing surface extends in a direction perpendicular (including "approximately perpendicular") to the movement direction of the first pressing member.
The first pressing member is disposed so that a pressing surface can protrude from a first space forming portion of the inner circumferential surface of the annular member, the first space forming portion, into the first space portion. For example, the first pressing member is disposed so that a pressing surface can protrude from the first space forming portion in a direction toward the center line of the annular member.
Then, when the tool shank is inserted into the first space portion such that one of the at least one flat surfaces faces the pressing surface of the first pressing member, the first pressing member is moved toward the first space portion along a direction intersecting the extending direction of the center line of the annular member , whereby the pressing surface of the first pressing member presses one of the at least one flat surfaces, and the outer peripheral surface of the tool shank abuts against the first space forming portion, thereby restricting the rotation of the at least one flat surface about the tool center line. For example, the rotation of the tool shank about the tool center line is restricted by the surface contact of one of the at least one flat surfaces of the tool shank with the pressing surface of the first pressing member.
When the first pressing member is moved toward the first space portion along a direction intersecting the extending direction of the center line of the annular member , the tool shank portion is clamped by the pressing surface of the first pressing member and the first space forming portion. At this time, the distance between the tip of the blade portion of the tool and the annular member (for example, the distance between the tip of the blade portion of the tool and the first end face or the second end face of the annular member) is set. Therefore, by setting the position (position along the axial direction of the tool shank portion) where the pressing surface of the first pressing member is abutted against at least one of the flat surfaces of the tool shank portion, it is possible to set the length (protruding length) of the tool protruding from the tip face of the tool holder when the tool is attached to the tool holder using the annular member.
In this embodiment, the first positioning mechanism is constituted by the first pressing member , the first space forming portion , and one of the at least one flat surface of the tool shank portion .
In this embodiment, the position of the tool shank portion of the tool with respect to the annular member about the center line of the tool can be set with a simple configuration, and further, the projection length of the tool can also be set.
In another embodiment of the present invention, the outer peripheral surface of the tool shank has a first shank outer peripheral surface portion and at least one second shank outer peripheral surface portion when viewed in a cross section perpendicular to the extension direction of the tool center line. The first shank outer peripheral surface portion extends along a circle centered on the tool center line. Furthermore, the at least one second shank outer peripheral surface portion extends linearly in a direction intersecting a line connecting the circumferential center of the at least one second shank outer peripheral surface portion and the tool center line. For example, it extends in a direction perpendicular (including "approximately perpendicular") to a line connecting the circumferential center of the at least one second shank outer peripheral surface portion and the tool center line.
In this embodiment, at least one outer peripheral surface portion of the second shank portion is used as at least one flat surface that is pressed by the pressing surface of the first pressing member.
In this embodiment, the position of the tool shank portion of the tool relative to the annular member about the tool center line can be set more reliably.
According to another aspect of the present invention, there is provided a second pressing member. The second pressing member has a contact member and an elastic member.
The abutment member is configured to be movable along a direction intersecting an extension direction of the center line of the annular member at a position opposite to the first pressing member across the center line of the annular member, and to be capable of protruding from the first space forming portion into the first space portion. For example, the abutment member is configured to be capable of protruding from the first space forming portion in the direction of the center line of the annular member.
The elastic force of the elastic member is configured to act as a force that moves the contact member in a direction in which the contact member protrudes from the first space forming portion into the first space portion .
In another embodiment of the present invention, the outer peripheral surface of the tool shank has a first shank outer peripheral surface portion and at least one second shank outer peripheral surface portion when viewed in a cross section perpendicular to the extension direction of the tool center line. The first shank outer peripheral surface portion extends along a circle centered on the tool center line. Furthermore, the at least one second shank outer peripheral surface portion extends linearly in a direction intersecting a line connecting the circumferential center of the at least one second shank outer peripheral surface portion and the tool center line. For example, it extends in a direction perpendicular (including "approximately perpendicular") to a line connecting the circumferential center of the second shank outer peripheral surface portion and the tool center line.
In this embodiment, at least one outer peripheral surface portion of the second shank portion is used as at least one flat surface that is pressed by the pressing surface of the first pressing member.
In this embodiment, the position of the tool shank portion of the tool relative to the annular member about the tool center line can be set more reliably.
According to another aspect of the present invention, there is provided a second pressing member. The second pressing member has a contact member and an elastic member.
The abutment member is configured to be movable along a direction intersecting an extension direction of the center line of the annular member at a position opposite to the first pressing member across the center line of the annular member, and to be capable of protruding from the first space forming portion into the first space portion. For example, the abutment member is configured to be capable of protruding from the first space forming portion in the direction of the center line of the annular member.
The elastic force of the elastic member is configured to act as a force that moves the contact member in a direction in which the contact member protrudes from the first space forming portion into the first space portion.
In this embodiment, the tool shank is inserted into the first space portion so that one of at least one flat surface faces the pressing surface of the first pressing member, and the first pressing member is moved toward the first space portion along a direction intersecting the extending direction of the center line of the annular member , so that the pressing surface of the first pressing member presses one of the at least one flat surface, and the outer circumferential surface of the tool shank abuts against the abutment member of the second pressing member and abuts against the first space forming portion. The abutment member is formed so that the tool shank can easily rotate around the tool center line when the outer circumferential surface of the tool shank abuts against the abutment member (surface of the abutment member). For example, a spherical ball is used as the abutment member. This makes it possible to easily set the position of the tool shank around the tool center line to a position (first position) where one of at least one flat surface of the tool shank and the pressing surface of the first pressing member are in surface contact with each other.
In this embodiment, the position of the tool shank portion of the tool relative to the annular member about the center line of the tool can be set more easily and reliably.
In another embodiment of the present invention, the second spatial portion of the inner space of the annular member is formed such that one of at least one flat surface of the tool shank portion is disposed in a position facing the pressing surface of the first pressing member by inserting the tool shank portion into the first spatial portion through the second spatial portion. For example, the inner diameter of the second spatial portion is set to be larger than the minimum outer diameter of the tool holder and smaller than the maximum outer diameter.
In this embodiment, the operation of attaching the tool to the tool holder becomes easier.
The different aspects of the present invention can be used when mounting a tool, the outer circumferential surface of the tool shank portion of which has at least one flat surface extending along the extension direction of the tool center line, to a tool holder.
In this embodiment, the first space forming portion of the inner peripheral surface of the annular member that forms the first space portion is formed to restrict rotation of one of the at least one flat surface of the tool shank portion about the tool center line. By using the annular member of this embodiment, for example, by inserting a tool holder into the first space portion of the annular member, the position of the tool holder about the tool holder center line with respect to the annular member can be set.
In this embodiment, the first positioning mechanism is constituted by one of the at least one flat surface of the tool shank portion and the first space forming portion.
In this embodiment, the annular member can be configured simply, and the operation of attaching the tool to the tool holder becomes easier.
In another embodiment of the present invention, the second positioning mechanism is configured by an engagement recess formed in one of the annular member and the tool holder, and an engagement protrusion formed in the other and releasably engageable with the engagement recess formed in the one. The shapes, numbers, arrangement positions, etc. of the engagement recess and engagement protrusion can be appropriately selected.
In this embodiment, the position of the annular member about the center line of the annular member relative to the tool holder can be set with a simple configuration.

By using the tool mounting aid of the present invention, the position of the tool around the tool centerline relative to the tool holder can be easily set.

1 is a cross-sectional view of a first example of a tool holder in which the tool mounting assisting tool of the present invention can be used; 1 is a cross-sectional view of a first embodiment of a tool attachment assisting tool of the present invention. FIG. 5A to 5C are diagrams illustrating an operation of attaching the tool attachment assisting tool of the first embodiment to a tool. 5A to 5C are diagrams illustrating an operation of attaching the tool attachment assisting tool of the first embodiment to a tool. 5A to 5C are diagrams illustrating an operation of attaching the tool attachment assisting tool of the first embodiment to a tool. 6 is a view seen from the direction of arrows VI-VI in FIG. 5. 5A to 5C are diagrams illustrating an operation of attaching a tool to a first example tool holder using the tool attachment assisting tool of the first embodiment. 5A to 5C are diagrams illustrating an operation of attaching a tool to a first example tool holder using the tool attachment assisting tool of the first embodiment. FIG. 11 is a cross-sectional view of a second example of a tool holder in which the tool mounting assisting tool of the present invention can be used. FIG. 4 is a cross-sectional view of a second embodiment of a tool attachment assisting tool of the present invention. 13A to 13C are diagrams illustrating an operation of attaching a tool to a tool holder of a second example using the tool attachment assisting tool of the second embodiment. FIG. 11 is a cross-sectional view of a third embodiment of a tool attachment assisting tool of the present invention. FIG. 11 is a cross-sectional view of a fourth embodiment of a tool attachment assisting tool of the present invention. FIG. 13 is a cross-sectional view of a fifth embodiment of a tool attachment assisting tool of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In this specification, the center line P of the tool insertion space of the tool holder is referred to as the "tool holder center line", the extending direction of the center line P is referred to as the "axial direction", the side along the axial direction where the tool shank is inserted into the tool insertion space (the left side indicated by arrow A in Figs. 1 and 9) is referred to as the "tip side", and the side opposite the side where the tool shank is inserted (the right side indicated by arrow B in Figs. 1 and 9) is referred to as the "rear end side". The center line T of the tool shank is referred to as the "tool center line", the side along the extending direction of the center line T where the tool is inserted into the tool insertion space (the right side in Fig. 7) is referred to as the "rear end side", and the side opposite the side where the tool is inserted into the tool insertion space (the left side in Fig. 7) is referred to as the "tip side". The center line Q of the inner space of the preset ring (annular member) is referred to as the "preset ring center line (annular member center line)." Along the center line Q, the side facing the tip surface of the tool holder (the right side in FIG. 2(b)) is referred to as the "rear end side." And the side opposite to the side facing the tip surface of the tool holder (the left side in FIG. 2(b)) is referred to as the "tip side."

First, a first example of a tool holder for mounting a tool will be described with reference to FIG.
The tool holder 10 of the first example is composed of a main body 20 and a sleeve 30 .

The main body 20 is formed in a cylindrical shape extending along the axial direction.
The main body 20 has a main body inner circumferential surface 21, a main body outer circumferential surface 22, a main body tip surface 20A, and a main body rear end surface 20B. The main body inner circumferential surface 21 defines a main body inner space 20a that extends along the axial direction and has a circular cross section.
A fluid passage 23 filled with a pressurized medium is formed in the main body 20. The pressurized medium may be, for example, oil. The main body 20 is also provided with a pressure adjustment screw 40 for adjusting the pressure of the pressurized medium in the fluid passage 23.
The main body outer peripheral surface 22 has a main body outer peripheral surface portion 22a on the main body tip surface 20A side. A protrusion 24 having a center line coincident with the tool holder center line P is formed by the main body outer peripheral surface portion 22a. The protrusion 24 is formed so as to be detachably insertable (engageable) into a recess 110f of a preset ring 110, which will be described later. In this embodiment, the main body outer peripheral surface portion 22a forming the protrusion 24 has a polygonal cross section.

The sleeve 30 is formed in a cylindrical shape extending along the axial direction.
The sleeve 30 has a sleeve inner circumferential surface 31, a sleeve outer circumferential surface 32, a sleeve front end surface 30A, and a sleeve rear end surface 30B. The sleeve inner circumferential surface 31 defines a sleeve inner space 30a that extends along the axial direction and has a circular cross section.
The sleeve outer peripheral surface 32 has sleeve outer peripheral surface portions 32a, 32b formed as concave surfaces recessed radially inward. Thin gripping portions 33a, 33b that are elastically deformable along the radial direction are formed between the sleeve outer peripheral surface portions 32a, 32b and the sleeve inner peripheral surface 31.
The sleeve 30 is inserted into the body inner space 20a from the tip side and fixed to the body 20. For example, the sleeve outer peripheral surface 32 is brazed to the body inner peripheral surface 21.
As a result, a sealed region into which the pressurized medium is injected is formed between the sleeve outer peripheral surface 32 and the main body inner peripheral surface 21. That is, pressurizing chambers 25a and 25b are formed between the sleeve outer peripheral surface portions 32a and 32b and the main body inner peripheral surface 21. The pressurizing chambers 25a and 25b are in communication with the fluid passage 23.
The sleeve inner space 30a and the main body inner space 20a form a “tool insertion space.” The main body tip surface 20A and the sleeve tip surface 30A form a “tool holder tip surface.”

3 and 6 is attached to the tool holder 10, the tool shank 52 of the tool 50 is inserted into the tool insertion space. Then, the pressure adjustment screw 40 is operated to increase the pressure of the pressurized medium in the pressurizing chambers 25a and 25b. This causes the gripping portions 33a and 33b to elastically deform radially inward, and the tool shank 52 is gripped by the portions of the sleeve inner circumferential surface 31 that correspond to the gripping portions 33a and 33b.
When the tool 50 is to be removed, the pressure of the pressurized medium in the pressurizing chambers 25a and 25b is reduced.
The pressure chambers 25a and 25b and the gripping portions 33a and 33b form a gripping mechanism that grips the tool shank portion 52 (the tool 50).

Next, an example of a tool that can be attached to the tool holder 10 will be described with reference to FIGS.
The tool 50 has a cutting portion 51 and a tool shank portion 52 .
The tool shank portion 52 is formed of a cylindrical member having a circular cross section. In addition, a first flat surface 52b1 and a second flat surface 52b2 are formed on the outer circumferential surface of the tool shank portion 52, the first flat surface 52b1 and the second flat surface 52b2 being formed by cutting out the outer circumferential surface of the cylindrical member along the extension direction of the tool center line T. The first flat surface 52b1 and the second flat surface 52b2 are formed at positions facing each other across the tool center line T.
Specifically, as shown in Fig. 3, the outer peripheral surface of the tool shank portion 52 has an outer peripheral surface portion 52a, a first flat surface 52b1, and a second flat surface 52b2 when viewed in a cross section perpendicular to the extension direction of the tool center line T. The outer peripheral surface portion 52a is formed as an arc surface extending along a circle having a radius of (D1/2) mm centered on the tool center line T. The first flat surface 52b1 (second flat surface 52b2) is formed as a flat surface extending linearly in a direction perpendicular (including "approximately perpendicular") to a line connecting the circumferential center of the first flat surface 52b1 (second flat surface 52b2) and the tool center line T, at a position (D2/2) mm from the tool center line T. That is, the tool shank portion 52 has a minimum outer diameter D2 mm (the distance between the first flat surface 52b1 and the second flat surface 52b2) and a maximum outer diameter D1 mm (D1>D2) (the diameter of the outer circumferential surface portion 52a).
The tool 50 used may have a number of flat surfaces, including one, formed on the outer peripheral surface of the tool shank portion 52 .
The outer peripheral surface portion 52a corresponds to the "first shank portion outer peripheral surface portion" or the "first outer peripheral surface portion," the flat surfaces (first flat surface 52b1, second flat surface 52b2) correspond to the "second shank portion outer peripheral surface portion" or the "second inner peripheral surface portion," the first flat surface 52b1 corresponds to "one of the flat surfaces" or "one of the two second shank portion outer peripheral surface portions" or "one of the two second outer peripheral surface portions," and the second flat surface 52b2 corresponds to the "other of the two second shank portion outer peripheral surface portions" or the "other of the two second outer peripheral surface portions."

Next, a first embodiment of the tool mounting assisting tool of the present invention, which assists in the task of setting the position of the tool 50 relative to the tool holder 10 when mounting the tool 50 to the tool holder 10, will be described with reference to FIG. 2. FIG. 2(a) is a cross-sectional view of the tool mounting assisting tool 100 of the first embodiment. FIG. 2(b) is a cross-sectional view as viewed from the direction of the arrows II-II in FIG. 2(a).

The tool attachment assist tool 100 of this embodiment is configured with a preset ring 110.
The preset ring 110 is formed as an annular member extending along a preset ring center line Q (hereinafter simply referred to as the “center line Q”), and has a first preset ring end face (hereinafter simply referred to as the “first end face”) 110A, a second preset ring end face (hereinafter simply referred to as the “second end face”) 110B, a preset ring inner circumferential surface (hereinafter simply referred to as the “inner circumferential surface”) 111, and a preset ring outer circumferential surface (hereinafter simply referred to as the “outer circumferential surface”) 112.
The first end surface 110A and the second end surface 110B are formed on the front end side and the rear end side along the center line Q.
The inner circumferential surface 111 defines a preset ring inner space (hereinafter simply referred to as the "inner space") 110a that opens to the first end face 110A and the second end face 110B and extends along the center line Q. That is, the inner space 110a is formed as a communication hole that communicates between the first end face 110A and the second end face 110B.
The inner peripheral surface 111 has preset ring inner peripheral surface portions (hereinafter simply referred to as "inner peripheral surface portions") 111a to 111g when viewed in a cross section perpendicular to the extending direction of the center line Q (see FIG. 2(a)). The inner peripheral surface portions 111a and 111c are formed in an arc shape with a radius R mm equal to (including "approximately equal to") the radius (D1/2) of the outer peripheral surface portion 52a of the tool shank portion 52. The inner peripheral surface portion 111a is formed as an arc surface extending along a circle centered on the center line Q. The inner peripheral surface portion 111b connects one end of the inner peripheral surface portion 111a (the end opposite the outer peripheral surface 112) and one end of the inner peripheral surface portion 111c (the end opposite the outer peripheral surface 112), and extends linearly. The inner peripheral surface portion 111d connects the other end of the inner peripheral surface portion 111a and the outer peripheral surface 112, and extends linearly. The inner circumferential surface portion 111e connects the other end of the inner circumferential surface portion 111c to the outer circumferential surface 112 and extends linearly parallel to (including substantially parallel to) the inner circumferential surface portion 111d. The shapes of the inner circumferential surface portions 111b and 111c can be changed as appropriate.
The inner circumferential surface portions 111a to 111c form a first preset ring space portion (hereinafter referred to as the "first space portion") 110b. The inner circumferential surface portions 111d and 111e form a second preset ring space portion (hereinafter referred to as the "second space portion") 110c. The second space portion 110c extends from the first space portion 110b along a direction intersecting the extension direction of the center line Q. In this embodiment, the second space portion 110c extends along a direction perpendicular (including "approximately perpendicular") to the extension direction of the center line Q.

In this embodiment, the preset ring 110 corresponds to the "annular member" of the present invention, the preset ring inner space 110a corresponds to the "inner space that opens to the first end face and the second end face and extends along the extension direction of the center line of the annular member" of the present invention, the first preset ring space portion 110b corresponds to the "first space portion" of the present invention, the second preset ring space portion 110c corresponds to the "second space portion" of the present invention, and the preset ring inner peripheral surface portions 111a to 111c and 111e correspond to the "first space forming portion that forms the first space portion" of the present invention.

In addition, the preset ring 110 has holes 110d and 110e extending in a direction intersecting the extending direction of the center line Q. In this embodiment, the holes 110d and 110e extend in a direction perpendicular (including "substantially perpendicular") to the extending direction of the center line Q. The hole 110e opens in the inner circumferential surface portion 111a. The hole 110d opens in the inner circumferential surface portion on the opposite side of the center line Q to the hole 110e, that is, in this embodiment, the inner circumferential surface portions 111c and 111e. In this embodiment, the holes 110d and 110e are formed as through holes opening to the inner circumferential surface 111 and the outer circumferential surface 112.
In the hole 110d, a screw 120 is arranged so as to be movable along the extension direction of the hole 110d. The screw 120 has a tip surface 121 on the first space portion 110b side (center line Q side). When viewed in a cross section perpendicular to the extension direction of the center line Q (see FIG. 2A), the screw 120 is arranged so that the tip surface 121 extends in a direction intersecting a line connecting the circumferential center of the tip surface 121 and the center line Q. In this embodiment, the tip surface 121 is arranged so as to extend in a direction perpendicular (including "approximately perpendicular") to the line connecting the circumferential center of the tip surface 121 and the center line Q.
A ball plunger 130 is disposed in the hole 110e. The ball plunger 130 has a main body 131, a spring 132, and a ball 133. The main body 131 is screwed to the inner peripheral surface of the hole 110e and is movable along the extension direction of the hole 110e. An opening having an inner diameter smaller than the diameter of the ball 133 is formed on the first space portion 110b side of the main body 131. The elastic force of the spring 132 applies a force to the ball 133 to move in a direction to jump out of the opening toward the first space portion 110b side (toward the center line Q).
In this embodiment, the holes 110d and 110e are formed at positions facing each other across the center line Q such that the center lines of the holes 110d and 110e pass through the center line Q.

In this embodiment, the screw 120 corresponds to the "first pressing member" of the present invention, and the tip surface 121 of the screw 120 corresponds to the "pressing surface" of the present invention.
In addition, ball plunger 130 corresponds to the “second pressing member” of the present invention, ball 133 corresponds to the “abutment member of the second elastic member” of the present invention, and spring 132 corresponds to the “elastic member of the second pressing member” of the present invention.

Further, the preset ring 110 has a recess 110f formed on the second end face 110B side by inner circumferential surface portions 111f and 111g, the recess 110f having the center line Q as its center line.
The inner peripheral surface portion 111g forming the recess 110f is formed so that the protrusion 24 of the tool holder 10 can be detachably inserted (engaged) into it. In this embodiment, the protrusion 24 is formed into a polygon having the same number of sides (number of corners) as the polygon of the protrusion 24. The protrusion 24 and the recess 110f are formed so as to be detachably fitted into each other.
The projection 24 of the tool holder 10 engages with the recess 110 f of the preset ring 110 , whereby the position (phase) of the preset ring 110 around the center line Q with respect to the tool holder 10 is set.
In this embodiment, the protrusion 24 of the tool holder 10 and the recess 110f of the preset ring 110 constitute a "second positioning mechanism for setting the position of the annular member about the center line of the annular member relative to the tool holder" of the present invention.
Alternatively, the recess constituting the second positioning mechanism may be formed in the tool holder 10 and the protrusion may be formed in the preset ring 110 .

Next, the operation of attaching the tool 50 to the tool holder 10 using the tool attachment assisting tool 100 of the first embodiment will be described with reference to FIGS.
Fig. 3 is a cross-sectional view showing a state where the tool shank portion 52 is inserted into the first space portion 110b of the preset ring 110. Fig. 4 is a cross-sectional view for explaining the action of the ball plunger 130. Fig. 5 is a cross-sectional view showing a state where the tool shank portion 52 inserted into the first space portion 110b is pressed by the screw 120, and Fig. 6 is a cross-sectional view seen from the direction of arrows VI-VI in Fig. 5. Fig. 7 is a cross-sectional view showing a state where the tool 50 having the preset ring 110 attached to the tool shank portion 52 is attached to the tool holder 10. Fig. 8 is a cross-sectional view showing a state where the preset ring 110 is removed.

First, an operation of attaching the preset ring 110 constituting the tool attachment assisting tool 100 to the tool shank portion 52 of the tool 50 will be described.
The tool shank portion 52 is inserted into the first space portion 110b through the second space portion 110c of the preset ring 110. Then, the position of the tool shank portion 52 around the tool center line T is adjusted so that the first flat surface 52b1 of the tool shank portion 52 inserted into the first space portion 110b is positioned opposite the tip surface 121 of the screw 120.
In this embodiment, the distance L between the inner circumferential surface portions 111d and 111e (the inner diameter of the second space portion 110c) is set to be larger than the minimum outer diameter D2 and smaller than the maximum outer diameter D1 of the tool shank portion 52. As a result, when the tool shank portion 52 is inserted into the first space portion 110b via the second space portion 110c of the preset ring 110, the first flat surface 52b1 of the tool shank portion 52 is disposed in a position facing the tip surface 121 of the screw 120, as shown in FIG.
At this time, it is preferable to insert the tool shank portion 52 into the first space portion 110b until the outer peripheral surface portion 52a abuts against the inner peripheral surface portion 111b that forms the first space portion 110b of the preset ring 110.

With the tool shank portion 52 inserted into the first space portion 110b, the screw 120 is moved toward the first space portion 110b (in the direction of the center line Q) along the extending direction of the hole 110d.
When the tip surface 121 of the screw 120 abuts against the first flat surface 52b1 of the tool shank portion 52, the tool shank portion 52 is pressed and moved by the screw 120. When the screw 120 is further moved, the second flat surface 52b2 of the tool shank portion 52 abuts against the ball 133 of the ball plunger 130, as shown in FIG.
In this case, with the second flat surface 52b2 in contact with the surface 133a of the ball 133 of the ball plunger 130 (a force in the opposite direction to the pressing force of the screw 120 acting on the second flat surface 52b2 due to the elastic force of the spring 132), the first flat surface 52b1 is pressed by the tip surface 121 of the screw 120, so that the tool shank portion 52 rotates around the tool center line T in the direction shown by the arrow in Fig. 4(a) . Then, the position (phase) of the tool shank portion 52 around the tool center line T is set to a position where the tip surface 121 of the screw 120 comes into surface contact (also called "surface contact") with the first flat surface 52b1, as shown in Fig. 4(b). Furthermore, even when transitioning from the state shown in Figure 3 to the state shown in Figure 4 (a), the pressing force of the screw 120 acts as a force to rotate the tool shank portion 52 so that the tip surface 121 of the screw 120 comes into surface contact with the first flat surface 52b1.
The position around the tool center line T of the tool shank portion 52 where the tip surface 121 of the screw 120 comes into surface contact with the first flat surface 52b1 corresponds to the "first position" of the present invention.
When the screw 120 is moved further, with the position of the tool shank portion 52 set around the tool center line T, as shown in Figure 5, the portion of the outer peripheral surface portion 52a of the tool shank portion 52 surrounding the second flat surface 52b2 abuts against the inner peripheral surface portion 111a.
The inner peripheral surface portion 111a is formed in a shape corresponding to the outer peripheral surface portion 52a of the tool shank portion 52. In this embodiment, the inner peripheral surface portion 111a is formed into an arc surface having a center on the center line Q and a radius R equal to the radius (D1/2) of the outer peripheral surface portion 52a of the tool shank portion 52. As a result, the tool shank portion 52 is stably held (clamped) by the screw 120 and the inner peripheral surface portion 111a with its position around the tool center line T set.
When the preset ring 110 is to be removed from the tool shank portion 52, the screw 120 is moved to the side opposite to the first space portion 110b.

In this manner, the position of the tool shank portion 52 around the tool center line T with respect to the preset ring 110 is set. The shape of the first space portion 110b and the positions of the screw 120 and the ball plunger 130 are set based on the positional relationship around the tool center line T between the flat surfaces (e.g., first flat surfaces 52b1, 52b2) formed on the tool shank portion 52 of the tool 50 and the cutting edge of the cutting portion 51.
In this embodiment, the first flat surface 52b1 of the tool shank portion 52, the screw 120, and the first space forming portion 111a of the preset ring 110 constitute the “first positioning mechanism for setting the position of the tool shank portion about the tool center line relative to the annular member” of the present invention.
Furthermore, the second flat surface 52b2 of the tool shank portion 52 and the ball plunger 130 facilitate rotation of the tool shank portion 52 around the tool center line T (rotation to a position where the first flat surface 52b1 of the tool shank portion 52 and the tip surface 121 of the screw 120 are in surface contact).

Next, with the preset ring 110 attached to the tool shank portion 52 , the tool 50 is attached to the tool holder 10 .
7, a portion of the tool shank portion 52 rearward of the portion where the preset ring 110 is attached is inserted into the tool insertion space of the tool holder 10. Also, the protrusion 24 formed on the tool holder tip face side of the tool holder 10 is inserted into the recess 110f formed on the second end face 110B side of the preset ring 110. At this time, the preset ring 110 is attached to the tool holder so that the tool holder tip face (main body tip face 20A) of the tool holder 10 abuts against the inner peripheral surface portion 111f of the preset ring 110.
In this embodiment, the inner peripheral surface (inner peripheral surface portion 111g) of the recess 110f and the outer peripheral surface (outer peripheral surface portion 22a) of the protrusion 24 are formed into polygons with the same number of sides (number of corners). In addition, the phase of the protrusion 24 to be inserted into the recess 110f is determined. For example, marks are placed on a predetermined side (corner) of the recess 110f and a predetermined side (corner) of the protrusion 24, and the protrusion 24 is inserted into the recess 110f so that the marks match.
The position about the center line Q of the preset ring 110 at which a predetermined position of the projection 24 faces a predetermined position of the recess 110f corresponds to the "second position" of the present invention.
This sets the position (phase) of the preset ring 110 around the center line Q with respect to the tool holder 10 .
As described above, the position of the tool shank portion 52 around the tool center line T with respect to the preset ring 110 is set.
Therefore, the position of the tool 50 (tool shank portion 52) around the tool center line T relative to the tool holder 10 is set.
In addition, a second positioning mechanism for setting the position of the tool 50 (tool shank portion 52) about the tool center line T relative to the tool holder 10 can be configured by a protrusion formed at a predetermined position along the circumferential direction of the outer peripheral surface portion 22a of the tool holder 10 and a recess formed at a predetermined position along the circumferential direction of the inner peripheral surface portion 11g that forms the recess 110f of the preset ring 110 and that is engageable with the protrusion.

7, the pressure adjustment screw 40 of the tool holder 10 is operated to increase the pressure of the pressurized medium in the pressurizing chambers 25a and 25b. This causes the gripping portions 33a and 33b to elastically deform radially inward, and the tool shank portion 52 inserted in the tool insertion space is clamped by the portions of the sleeve inner circumferential surface 31 that correspond to the gripping portions 33a and 33b.
Thereafter, the preset ring 110 is removed from the tool shank portion 52 as shown in FIG.

When machining a workpiece using a tool attached to a tool holder that is attached to the spindle of a machine tool, it is necessary to set not only the phase of the tool relative to the tool holder but also the extension length of the tool.
By using the tool mounting assist tool 100 of the first embodiment, as described above, it is possible to set the position (phase) of the tool relative to the tool holder.
By using the tool mounting assist tool 100 of the first embodiment, the protrusion length of the tool can also be set.
The operation of setting the tool extension length using the tool mounting assist tool 100 of the first embodiment will be described below.

When the tool shank portion 52 is attached to the preset ring 110, the distance M1 between the tip of the blade portion 51 of the tool 50 and the first end face 110A of the preset ring 110 or the distance N between the tip of the blade portion 51 and the inner peripheral surface portion 111f (see FIG. 6) is set to a set value. For example, the tool shank portion 52 inserted into the first space portion 110b is moved along the extension direction of the first space portion 110b (extension direction of the center line Q). Since the distance M2 between the first end face 110A and the inner peripheral surface portion 111f is fixed, the distance N (=M1+M2) can be set to the set value by setting the distance M1 to the set value.
As a method for setting the distance M or N to the respective set values, for example, the method disclosed in Patent Document 1 (Japanese Patent Laid-Open Publication No. 2001-105283) can be used.
Then, with the distance M1 or N set to the respective set value, the screw 120 is moved to attach the tool shank portion 52 to the preset ring 110.
When the preset ring 110 having the tool 50 (tool shank portion 52) attached thereto is attached to the tool holder 10 by the method described above, the length N of the tool 50 protruding from the tool holder tip face (main body tip face 20A) (tool protrusion length) is set to a set value, as shown in FIGS. 7 and 8 .

The second positioning mechanism that sets the position of the preset ring around the center line of the preset ring relative to the tool holder is not limited to the second positioning mechanism of the configuration described above. Below, a second embodiment of a tool attachment support tool using a second positioning mechanism of a different configuration is described.

A second example of a tool holder to which a tool 50 can be attached using the tool mounting assisting tool of the second embodiment will be described with reference to FIG.
The tool holder 60 of the second example has a body portion 20 and a sleeve 30, similar to the tool holder 10 of the first example shown in FIG.
In the second example of the tool holder 60, a recess 25 is formed in a body tip surface 20A (radially outward from the body inner peripheral surface 21) of the body 20. The recess 25 is formed to be detachably engageable with a protrusion 260 of a preset ring 210, which will be described later.

Next, a second embodiment of the tool attachment support tool of the present invention, which can be used when attaching a tool 50 to a tool holder 60 of the second example, will be described with reference to FIG. 10. FIG. 10(a) is a cross-sectional view of the tool attachment support tool 200 of the second embodiment. FIG. 10(b) shows a cross-sectional view seen from the direction of the arrows X-X in FIG. 10(a).

The tool mounting assist tool 200 of this embodiment has a preset ring 210, a screw 220, and a ball plunger 230, similarly to the tool mounting assist tool 100 of the first embodiment. Note that in Fig. 10, components having the same reference numerals as those shown in Fig. 2 except for the third digit are the same components.
In the tool mounting assist tool 200 of this embodiment, the preset ring 210 has a protrusion 260 on the second end face 210B (radially outside the second space portion 210c). The protrusion 260 is formed to be insertable (engageable) into the recess 25 of the tool holder 60. The shapes of the outer circumferential surface of the protrusion 260 and the inner circumferential surface of the recess 25 can be set to various shapes such as a circle, a polygon, etc. The protrusion 260 and the recess 25 are formed to be detachably fitted together.
In this embodiment, the position around the center line Q of the preset ring 210 where the protrusion 260 and the recess 25 fit together corresponds to the "second position" of the present invention. The recess 25 of the tool holder 60 and the protrusion 260 of the preset ring 210 form a "second positioning mechanism that sets the position of the annular member about the center line of the annular member relative to the tool holder" of the present invention.
Alternatively, the protrusion constituting the second positioning mechanism may be formed on the tool holder 60 and the recess may be formed on the preset ring 210 .

An operation of attaching a tool 50 to a tool holder 60 using the tool attachment support tool 200 of the second embodiment will be described.
The operation of attaching the preset ring 210 constituting the tool attachment assisting tool 200 to the tool shank portion 52 of the tool 50 is similar to the operation of attaching the preset ring 110 to the tool shank portion 52 (see FIGS. 3 to 6).
Next, with the preset ring 210 attached to the tool shank portion 52 , the tool 50 is attached to the tool holder 60 .
Specifically, as shown in FIG. 11 , the rear end side of the tool shank portion 52 relative to the portion where the preset ring 210 is attached is inserted into the tool insertion space of the tool holder 60 .
Furthermore, the second end face 210B of the preset ring 210 is brought into contact with the tool holder tip face (main body tip face 40A) of the tool holder 60. At this time, the protrusion 260 formed on the second end face 210B of the preset ring 210 is inserted into the recess 25 formed in the tool holder tip face (main body tip face 20A) of the tool holder 60. The protrusion 260 is formed at a position away from the preset ring center line Q, and the recess 25 is formed at a position away from the tool holder center line P. Therefore, by inserting (engaging) the protrusion 260 into the recess 25, the position of the preset ring 210 around the center line Q with respect to the tool holder 60 is set.
Then, in the same manner as when the tool 50 is attached to the tool holder 10 , the gripping mechanism of the tool holder 60 is operated to grip the tool shank portion 52 , and then the preset ring 210 is removed from the tool shank portion 52 .

In the above description of the tool mounting support tool 100 of the first embodiment (the tool mounting support tool 200 of the second embodiment), a case has been described in which a tool 50 having a second flat surface 52b2 formed on the outer peripheral surface of the tool shank portion 52 at a position facing the first flat surface 52b1 across the tool center line T is mounted on the preset ring 110 (210). However, a tool having no second flat surface formed on the outer peripheral surface of the tool shank portion can also be mounted on the preset ring 110 (210). In this case, the ball 133 of the ball plunger 130 (ball 233 of the ball plunger 230) abuts against the outer peripheral surface portion 52a of the tool holder 60.
Although the ball plunger 130 (230) is used as the second pressing member that applies a force to the tool 50 in the opposite direction to the pressing force of the screw 120 (220), the second pressing member is not limited to the ball plunger as long as it has a contact member and an elastic member that generates an elastic force that moves the contact member. As the contact member, a member that allows the tool shank portion 52 to easily rotate about the tool center line T when in contact with the outer circumferential surface (outer circumferential surface portion, flat surface) of the tool shank portion 52 is used.

The first positioning mechanism that sets the position of the tool 50 (tool shank 52) around the tool center line relative to the preset ring is not limited to the first positioning mechanism having the above-mentioned configuration. Below, third to fifth embodiments of the tool attachment assisting tool using first positioning mechanisms having different configurations will be described.
In the following embodiment, a case will be described in which a second positioning mechanism similar to that in the second embodiment is used as a second positioning mechanism that sets the position of the preset ring about the center line Q with respect to the tool holder.

A third embodiment of a tool attachment assisting tool of the present invention will be described with reference to FIG.
Fig. 12(a) is a cross-sectional view of the tool attachment assisting tool 300 according to the third embodiment, and Fig. 12(b) is a cross-sectional view taken along the direction of arrows XII-XII in Fig. 12(a).

The tool attachment assisting tool 300 of the third embodiment is configured with a preset ring 310 .
The preset ring 310 is formed as an annular member extending along the center line Q, and has a first end face 310A, a second end face 310B, an inner circumferential surface 311, and an outer circumferential surface 312. The inner circumferential surface 311 forms an inner space 310a that opens to the first end face 310A and the second end face 310B and extends along the center line Q.
The inner circumferential surface 311 has inner circumferential surface portions 311a to 311e having the same shape as the inner circumferential surface portions 111a to 111e of the preset ring 110 of the first embodiment. That is, like the inner space 110a of the preset ring 110, the inner space 310a has a first space portion 310b formed by the inner circumferential surface portions 311a to 311c and a second space portion 310c formed by the inner circumferential surface portions 311d and 311e.

Further, a hole 310d is formed in the preset ring 310, extending in a direction intersecting the extending direction of the center line Q. The hole 310d is formed on the opposite side of the center line Q to the inner circumferential surface portion 311a, and opens to the inner circumferential surface portions 311c and 311e.
A screw 320 is disposed in the hole 310d. The screw 320 has the same shape as the screw 120 used in the preset ring 110 of the first embodiment. That is, a tip surface 321 of the screw 320 extends along a direction perpendicular (including "approximately perpendicular") to a line connecting the circumferential center of the tip surface 321 and the center line Q when viewed in a cross section perpendicular to the extending direction of the center line Q (see FIG. 12(a)).
It should be noted that the preset ring 310 of this embodiment does not have the hole 110e and the ball plunger 130 of the preset ring 110 of the first embodiment.
Further, in the preset ring 310 of this embodiment, similarly to the preset ring 210 of the second embodiment, a protrusion 360 that can be inserted (engaged) into the recess 25 of the tool holder 60 is formed on the second end face 310B.

In this embodiment, the first flat surface 52b1 of the tool shank portion 52, the screw 320, and the inner peripheral surface portion 311a of the preset ring 310 constitute the "first positioning mechanism for setting the position of the tool shank portion around the tool center line relative to the annular member" of the present invention.

An operation of attaching a tool 50 to a tool holder 60 using the tool attachment support tool 300 of the third embodiment will be described.
First, the tool shank portion 52 of the tool 60 is inserted into the first spatial portion 310b through the second spatial portion 310c of the preset ring 310. The operation of inserting the tool shank portion 52 into the first spatial portion 310b of the preset ring 310 is similar to the operation of inserting the tool shank portion 52 into the first spatial portion 110b of the preset ring 110 (see FIG. 3).
With the tool shank portion 52 inserted into the first space portion 310b of the preset ring 310, the screw 320 is moved toward the second space portion 310c (toward the center line Q) along the extending direction of the hole 310d.
At this time, the position (phase) of the tool shank portion 52 about the tool center line T is set so that the tip surface 321 of the screw 320 is in surface contact with the first flat surface 52b1, as shown in FIG. 12(a).
Next, with the preset ring 310 attached to the tool shank portion 52, the preset ring 310 is attached to the tool holder 60. At this time, the protrusion 360 of the preset ring 310 is inserted into the recess 25 of the tool holder 60. As a result, the position of the preset ring 310 around the center line Q with respect to the tool holder 60 is set, as described above.
Then, as described above, after the gripping mechanism of the tool holder 60 is actuated, the preset ring 310 is removed from the tool shank portion 52 .
The tool mounting assist tool 300 of this embodiment can set the position of the tool 50 (the tool shank portion 52 ) about the tool center line T with respect to the tool holder 60 without providing a ball plunger on the preset ring 310 .

In the above description of the tool attachment assisting tool 100 of the first embodiment (the tool attachment assisting tool 200 of the second embodiment, and the tool attachment assisting tool 300 of the third embodiment), the inner peripheral surface portion 111a (211a, 311a) of the preset ring 110 (210, 310) is formed into a shape corresponding to the outer peripheral surface portion 52a of the tool shank portion 52, for example, into an arcuate surface with a radius R equal to (including "approximately equal to") the radius (D1/2) of the outer peripheral surface portion 52a. However, as long as the tool shank portion 52 can be sandwiched between the tip surface 121 (221) of the screw 120 (220) and the inner peripheral surface portion 111a (211a) of the preset ring 110 (210), the tool shank portion 52 may be formed into a shape other than the shape corresponding to the shape of the outer peripheral surface portion 52a of the tool shank portion 52. For example, the tool shank portion 52 may be formed into an elliptical surface or a flat surface.
In addition, the case where a tool 50 in which a second flat surface 52b2 is formed on the outer peripheral surface of the tool shank portion 52 at a position opposite the first flat surface 52b1 across the tool center line T is attached to the preset ring 310 has been described, but a tool in which a second flat surface is not formed on the outer peripheral surface of the tool shank portion can also be attached to the preset ring 310.

A fourth embodiment of the tool attachment assisting tool of the present invention will be described with reference to FIG.
Fig. 13(a) is a cross-sectional view of the tool attachment assisting tool 400 according to the fourth embodiment, and Fig. 13(b) is a cross-sectional view taken along the direction of arrows XIII-XIII in Fig. 13(a).

The tool attachment assisting tool 400 of the fourth embodiment is configured with a preset ring 410 .
The preset ring 410 is formed as an annular member extending along the center line Q, and has a first end face 410A, a second end face 410B, an inner circumferential surface 411, and an outer circumferential surface 412. The inner circumferential surface 411 forms an inner space 410a that opens to the first end face 410A and the second end face 410B and extends along the center line Q.
The inner peripheral surface 411 has inner peripheral surface portions 411a to 411e. The inner peripheral surface portions 411a and 411c extend linearly parallel (including "approximately parallel") to a direction perpendicular (including "approximately perpendicular") to the extension direction of the center line Q to a position beyond the center line Q on the opposite side to the outer peripheral surface 412. The inner peripheral surface portion 411b extends linearly between the ends of the inner peripheral surface portions 411a and 411c opposite the outer peripheral surface 412 in a direction perpendicular (including "approximately perpendicular") to the extension direction of the inner peripheral surface portions 411a and 411c. The inner peripheral surface portion 411d (411e) is formed between the inner peripheral surface portion 411a (411c) and the outer peripheral surface 412. The inner peripheral surface portions 411d and 411e extend in an inclined manner such that the distance between the inner peripheral surface portions 411d and 411e increases from the center line Q side toward the outer peripheral surface 412 side. The inner peripheral surface portions 411d and 411e act as guide surfaces when the tool shank portion 52 is inserted into the inner space 410a.

The distance L between the inner peripheral surface portions 411a and 411c is set to be larger than the minimum outer diameter D2 of the tool shank portion 52 and smaller than the maximum outer diameter D1.
In the preset ring 410 of this embodiment, a first space portion 410b is formed by the inner circumferential surface portion 411b and the portions of the inner circumferential surface portions 411a and 411c opposite the outer circumferential surface 412. A second space portion 410c is formed by the inner circumferential surface portions 411d and 411e and the portions of the inner circumferential surface portions 411a and 411c on the outer circumferential surface 412 side.

Further, the preset ring 410 is formed with a hole 410d extending in a direction intersecting the extending direction of the center line Q. The hole 410d opens to an inner circumferential surface portion 411c.
A screw 420 is disposed in the hole 410d. The screw 420 has the same shape as the screw 120 used in the preset ring 110 of the first embodiment. That is, a tip surface 421 of the screw 420 extends along a direction perpendicular (including "approximately perpendicular") to a line connecting the circumferential center of the tip surface 421 and the center line Q when viewed in a cross section perpendicular to the extending direction of the center line Q (see FIG. 13(a)).
Further, in the preset ring 410 of this embodiment, similarly to the preset ring 210 of the second embodiment, a protrusion 460 that can be inserted (engaged) into the recess 25 of the tool holder 60 is formed on the second end face 410B.
The preset ring 410 of the present embodiment does not have the hole 110e and the ball plunger 130 of the preset ring 110 of the first embodiment. Moreover, the portion of the inner circumferential surface portion 411a that forms the first space portion 410b is not formed into an arc surface, unlike the inner circumferential surface portion 311a of the preset ring 310 of the third embodiment.

In this embodiment, the first flat surface 52b1 of the tool shank portion 52, the screw 420, and the inner peripheral surface portion 411a of the preset ring 410 constitute the "first positioning mechanism for setting the position of the tool shank portion around the tool center line relative to the annular member" of the present invention.

An operation of attaching a tool 50 to a tool holder 60 using the tool attachment support tool 400 of the fourth embodiment will be described.
First, the tool shank portion 52 of the tool 50 is inserted into the first space portion 410 b through the second space portion 410 c of the preset ring 410 .
At this time, it is preferable to insert the outer circumferential surface portion 52a to a position where it abuts against the inner circumferential surface portion 411b.
With the tool shank portion 52 inserted into the first space portion 410b, the screw 420 is moved toward the first space portion 410b (toward the center line Q) along the extending direction of the hole 410d, and the tip surface 421 is brought into contact with the first flat surface 52b1 of the tool shank portion 52. Then, the tool shank portion 52 is pressed to bring the second flat surface 52b2 of the tool shank portion 52 into contact with the inner peripheral surface portion 411a of the preset ring 410. As a result, the tool shank portion 52 rotates around the tool center line T so that the first flat surface 52b1 comes into surface contact with the tip surface 421 of the screw 420. At this time, the abutment between the second flat surface 52b2 of the tool shank portion 52 and the inner peripheral surface portion 411a of the preset ring 410 promotes the rotation of the tool shank portion 52 around the tool center line T.
As a result of the above, the position of the tool 50 (the tool shank portion 52) around the tool center line T with respect to the preset ring 410 is set.
The subsequent operations are similar to those in the case where the tool mounting assisting tool 200 of the second embodiment is used.
The tool mounting assist tool 400 of this embodiment can set the position of the tool 50 (tool shank portion 52) around the tool center line T relative to the tool holder 60 without providing a ball plunger or an arc-shaped inner surface portion on the preset ring 410.

In the above description of the tool attachment support tool 400 of the fourth embodiment, a tool 50 having a second flat surface 52b2 formed on the outer peripheral surface of the tool shank portion 52 at a location facing the first flat surface 52b1 across the tool center line T is attached to the preset ring 410. However, a tool having no second flat surface formed on the outer peripheral surface of the tool shank portion can also be attached to the preset ring 410. In this case, the outer peripheral surface portion 52a of the tool shank portion 52 abuts against the inner peripheral surface portion 411a of the preset ring 410.

A fifth embodiment of a tool attachment assisting tool of the present invention will be described with reference to FIG.
Fig. 14(a) is a cross-sectional view of a tool mounting assisting tool 500 according to the fifth embodiment, and Fig. 14(b) is a cross-sectional view taken along the direction of arrows XIV-XIV in Fig. 14(a).

The tool mounting assist tool 500 of the fifth embodiment is configured with a preset ring 510 .
The preset ring 510 is formed as an annular member extending along the center line Q, and has a first end face 510A, a second end face 510B, an inner circumferential surface 511, and an outer circumferential surface 512. The inner circumferential surface 511 forms an inner space 510a that opens to the first end face 510A and the second end face 510B and extends along the center line Q.
The inner circumferential surface 511 has inner circumferential surface portions 511a to 511e, similar to the preset ring 410 of the fourth embodiment.
The preset ring 510 of this embodiment does not have the hole 410d and the screw 420 of the preset ring 410 of the fourth embodiment. Therefore, the distance L between the inner circumferential surface portions 511a and 511c is set to a distance equal to (including "approximately equal to") the minimum outer diameter D2 of the tool shank portion 52 within the range in which the tool shank portion 52 can move within the inner space 510a.
In the preset ring 510 of this embodiment, a first space portion 510b is formed by the inner circumferential surface portion 511b and the portions of the inner circumferential surface portions 511a and 511c opposite the outer circumferential surface 512. A second space portion 510c is formed by the portions of the inner circumferential surface portions 511a and 511c on the outer circumferential surface 512 side and the inner circumferential surface portions 511d and 511e.

In this embodiment, the first flat surface 52b1 and the second flat surface 52b2 of the tool shank portion 52 and the inner peripheral surface portions 511a and 511c of the preset ring 510 constitute the "first positioning mechanism for setting the position of the tool shank portion around the tool center line relative to the annular member" of the present invention.

An operation of attaching a tool 50 to a tool holder 60 using the tool attachment support tool 500 of the fifth embodiment will be described.
First, the tool shank portion 52 of the tool 50 is inserted into the first space portion 510b through the second space portion 510c of the preset ring 510. In this embodiment, the tool shank portion 52 is inserted into the first space portion 510b through the second space portion 510c in a state in which the first flat surface 52b1 and the second flat surface 52b2 are in approximate surface contact with the inner peripheral surface portions 511a and 511c of the preset ring 510, respectively. At this time, it is preferable to insert the tool shank portion 52 to a position where the outer peripheral surface portion 52a of the tool shank portion 52 abuts against the inner peripheral surface portion 511b.
In the preset ring 510 of the present embodiment, the position of the tool 50 (tool shank portion 52) around the tool center line T with respect to the preset ring 510 is set by inserting the tool shank portion 52 into the first space portion 510b.
The subsequent operations are similar to those in the case where the tool mounting assisting tool 200 of the second embodiment is used.
The tool mounting assist tool 500 of the present embodiment can set the position of the tool 50 (tool shank portion 52) around the tool center line T relative to the tool holder 60 without using a ball plunger, an arc-shaped inner surface portion, or a screw (pressing member) in the preset ring 510.

In the above description of the tool attachment support tool 500 of the fifth embodiment, a tool 50 having a second flat surface 52b2 formed on the outer peripheral surface of the tool shank portion 52 at a location facing the first flat surface 52b1 across the tool center line T is attached to the preset ring 510. However, a tool having no second flat surface formed on the outer peripheral surface of the tool shank portion can also be attached to the preset ring 510. For example, when a tool having a tool shank portion having only the first flat surface 52b1 formed thereon is attached to the preset ring 510, the outer peripheral surface portion 52a of the tool shank portion 52 abuts against the inner peripheral surface portion 511a of the preset ring 510.

The present invention is not limited to the configurations described in the embodiments, and various modifications, additions, and deletions are possible.
The above description concerns the case where a tool having two flat surfaces formed on the outer peripheral surface of the tool shank, opposite each other across the tool center line, is attached to a tool holder. However, the tool attachment aid of the present invention can be used when attaching tools having various numbers of flat surfaces, including one, to a tool holder.
The tool attachment assisting tool of the present invention is not limited to the case where a tool is attached to a tool holder having the configuration described in the embodiment, but can be used when attaching a tool to a tool holder having various configurations. For example, it can be used when folding a tool into a tool holder having a known gripping mechanism other than the gripping mechanism using a pressurized medium described in the embodiment.
In the embodiment, the tool shank is inserted into the first space portion through the second space portion of the inner space of the preset ring (annular member), so that one of the flat surfaces of the tool shank is disposed in a position facing the tip surface of the screw (the pressing surface of the pressing member) in the first space portion, but this is not limiting. For example, the tool shank can be manually rotated in the first space portion to dispose one of the flat surfaces of the tool shank in a position facing the tip surface of the screw (the pressing surface of the pressing member).
The shape of the preset ring (annular member), for example, the shape of the first spatial portion (the inner circumferential surface portion forming the first spatial portion) and the shape of the second spatial portion (the inner circumferential surface portion forming the second spatial portion) are not limited to the shapes described in the embodiment.
The configurations of the first positioning mechanism that sets the position of the tool (tool holder) relative to the preset ring (annular member) about the tool center line and the second positioning mechanism that sets the position of the preset ring (annular member) relative to the tool holder about the preset ring center line (annular member center line) are not limited to the configurations described in the embodiment.
Each of the configurations described in the embodiments can be used alone, or multiple appropriately selected configurations can be used in combination.

10, 60 Tool holder 20 Body 20A Body tip surface 20B Body rear surface 20a Body inner space 21 Body inner surface 22 Body outer surface 22a Body outer surface portion 23 Fluid passage 24 Protrusion (engagement protrusion)
25 Recess (engagement recess)
25a, 25b Pressurizing chamber 30 Sleeve 30A Sleeve front end surface 30B Sleeve rear end surface 30a Sleeve inner space 31 Sleeve inner peripheral surface 32 Sleeve outer peripheral surface 32a, 32b Sleeve outer peripheral surface portion 33a, 33b Grip portion 40 Pressure adjustment screw 50 Tool 51 Blade portion 52 Tool shank portion 52a First shank outer peripheral surface portion 52b1, 52b2 Second shank outer peripheral surface portion 100, 200, 300, 400, 500 Tool attachment support tool 110, 210, 310, 410, 510 Preset ring (annular member)
110A, 210A, 310A, 410A, 510A: First preset ring end surface (first annular member end surface)
110B, 210B, 310B, 410B, 510B: second preset ring end surface (second annular member end surface)
110a, 210a, 310a, 410a, 510a Preset ring inner space (inner space)
110b, 210b, 310b, 410b, 510b: first preset ring space portion (first annular member space portion)
110c, 210c, 310c, 410c, 510c: second preset ring space portion (second annular member space portion)
110d, 110e, 210d, 210e, 310d, 410d Hole 110f Recess (engagement recess)
111, 211, 311, 411, 511: Inner peripheral surface of preset ring (inner peripheral surface of annular member)
111a to 111g, 211a to 211e, 311a to 311e, 411a to 411e, 511a to 511e: Inner peripheral surface portion of preset ring (inner peripheral surface portion of annular member)
112, 212, 312, 412, 512 Preset ring outer circumferential surface (annular member outer circumferential surface)
120, 220, 320, 420 Screw (first pressing member)
121, 221, 321, 421 Tip surface (pressing surface)
130, 230 Ball plunger (second pressing member)
131, 231 Main body portion 132, 232 Spring (elastic member)
133, 233 Ball (contact member)
133a, 233a Surface 260, 360, 460, 560 Projection (engaging projection)

Claims (7)

A tool attachment assisting tool for assisting an operation of attaching a tool having a cutting portion and a tool shank portion to a tool holder, comprising:
An annular member is provided,
the annular member has a first end face and a second end face formed on one side and the other side along an extension direction of a center line of the annular member, an outer circumferential surface, an inner circumferential surface, and an inner space formed by the inner circumferential surface, opening at the first end face and the second end face, and extending along the extension direction of the center line of the annular member,
the inner space has a first space portion and a second space portion formed between the first space portion and the outer circumferential surface,
the inner space is configured so that the tool shank portion of the tool can be inserted into the first space portion via the second space portion and can be removed from the first space portion, and can move within the first space portion along an extension direction of a center line of the annular member,
a first positioning mechanism that sets a position of the tool shank portion inserted into the first space portion of the inner space about a tool center line with respect to the annular member;
a second positioning mechanism for setting a position of the annular member about a center line of the annular member relative to the tool holder; The tool attachment assisting tool according to claim 1,
The outer peripheral surface of the tool shank portion has at least one flat surface extending along an extension direction of the tool center line,
Further, a first pressing member is provided,
the first pressing member is movable along a direction intersecting an extension direction of a center line of the annular member, and a pressing surface extending along a direction intersecting a moving direction of the first pressing member is configured to protrude into the first space portion from a first space forming portion that forms the first space portion, of the inner circumferential surface of the annular member;
a pressing surface of the first pressing member that is disposed on the outer circumferential surface of the tool shank and that is opposed to the first space portion, the pressing surface of the first pressing member is moved toward the first space portion along a direction intersecting an extension direction of the annular member center line , the pressing surface of the first pressing member pressing the one of the at least one flat surface, and an outer circumferential surface of the tool shank is brought into contact with the first space forming portion, thereby restricting rotation of the one of the at least one flat surface around the tool center line,
The tool mounting assist device is characterized in that the first positioning mechanism is composed of the first pressing member , the first space forming portion , and the one of the at least one flat surface of the tool shank portion . The tool attachment assisting tool according to claim 2,
the outer peripheral surface of the tool shank portion, when viewed in a cross section perpendicular to the extension direction of the tool center line, has a first shank portion outer peripheral surface portion and at least one second shank portion outer peripheral surface portion, the first shank portion outer peripheral surface portion extending along a circle centered on the tool center line, and the at least one second shank portion outer peripheral surface portion is formed to extend linearly in a direction intersecting a line connecting a circumferential center of the at least one second shank portion outer peripheral surface portion and the tool center line,
A tool attachment assisting tool, characterized in that the at least one second shank outer peripheral surface portion is used as the at least one flat surface. The tool attachment assisting tool according to claim 2 or 3,
Further, a second pressing member is provided,
The second pressing member has a contact member and an elastic member,
the abutment member is configured to be movable along a direction intersecting an extension direction of the center line of the annular member at a position on the opposite side of the first pressing member with respect to the center line of the annular member, and to be capable of protruding from the first space forming portion into the first space portion,
The elastic force of the elastic member is configured to act as a force that moves the contact member in a direction in which the contact member protrudes from the first space forming portion into the first space portion ,
a pressing surface of the first pressing member that is disposed on the outer circumferential surface of the tool shank and that is in contact with the abutment member of the second pressing member, the pressing surface of the first pressing member being pressed against the first space forming portion by the pressing surface of the first pressing member , the pressing surface of the first pressing member being pressed against the first space forming portion by the pressing surface of the first pressing member, and the outer circumferential surface of the tool shank being pressed against the abutment member of the second pressing member. The tool attachment assisting tool according to any one of claims 2 to 4,
a second spatial portion of the inner space of the annular member being formed such that, when the tool shank portion is inserted into the first spatial portion through the second spatial portion, the one of the at least one flat surface of the tool shank portion is positioned opposite the pressing surface of the first pressing member. The tool attachment assisting tool according to claim 1,
The outer peripheral surface of the tool shank portion has at least one flat surface extending along an extension direction of the tool center line,
Furthermore, a first space forming portion of the inner circumferential surface of the annular member that forms the first space portion is formed so as to restrict rotation of the tool shank portion around the tool center line,
A tool mounting assisting tool, characterized in that the first positioning mechanism is constituted by the one of the at least one flat surface of the tool shank portion and the first space forming portion. A tool attachment assisting tool according to any one of claims 1 to 6,
a tool attachment support device characterized in that the second positioning mechanism is composed of an engagement recess formed in one of the annular member or the tool holder, and an engagement protrusion formed in the other of the annular member or the tool holder and releasably engageable with the engagement recess formed in the one of the annular member and the tool holder.

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