WO2009028120A1

WO2009028120A1 - Working machine

Info

Publication number: WO2009028120A1
Application number: PCT/JP2007/075219
Authority: WO
Inventors: Yasuhiro Komai
Original assignee: Nt Engineering Kabushiki Kaisha
Priority date: 2007-08-24
Filing date: 2007-12-19
Publication date: 2009-03-05
Also published as: JP4817144B2; JP2009050995A

Abstract

[PROBLEMS] To perform position correction of a tool fixed to a tool holder with high precision of micron order in the radial direction of the tool holder through simple constitution and control. [MEANS FOR SOLVING PROBLEMS] The working machine includes a tool holder (20) rotatable integrally with a spindle (16), a resilient holder portion (24) of a ring shape having one end bonded to the tool holder (20) and the other end for fixing blade tools (22a, 22b), a working shaft member (26) having an end projecting axially outward of the resilient holder portion (24) and rotatable relatively to the tool holder (20), a conversion mechanism (28) for changing the rotary operation of the working shaft member (26) into radial enlarging/shrinking operation of the resilient holder portion (24), and a support mechanism (72) arranged on the outside of the tool holder (20) and coupled with the working shaft member (26) in order to rotate it relatively to the tool holder (20).

Description

Specification

[Title of the Invention]

Work machine

【Technical field】

The present invention relates to a work machine in which a tool is attached to a tool holder that can rotate integrally with a spindle. [Background]

In general, tools mounted on tool holders, for example, machine tools (work machines) that perform processing on a workpiece via a processing tool are used. For example, the polling processing of the cylinders that make up an engine lock requires that the inner cylinder diameter be processed with high accuracy on the order of microns. For this reason, the poling process is usually divided into three processes: rough boring (roughing), medium finishing boring (medium finishing), and finishing boring (finishing).

In this type of boring, especially in finish boring, a high-precision machining diameter must be formed, and machining with a single blade is performed. However, in finishing boring with mass production equipment, since the machining is performed with a single cutting edge, the wear of the cutting edge is significant, and the machining diameter is reduced. Therefore, it is necessary to adjust the cutting edge position according to the change of the cutting diameter due to the cutting edge wear and to maintain a constant boring diameter.

Therefore, for example, it is conceivable to use the cylindrical inner surface processing apparatus disclosed in Patent Document 1. This machining apparatus is provided with a roughing cutter and a finishing cutter at positions opposite to each other on the outer periphery of the tip of the boring head, and is orthogonal to the central axis of the machining head. An elastic holder portion is provided that moves each blade tool in the same direction while being deformed by applying pressure in a direction and in a direction from the finishing blade tool toward the roughing blade tool. With features is doing. And in this patent document 1, it is compact and has rigidity, and the movement (correction) of the blade position can be performed with high accuracy.

[Patent Document 1]

JP 2 0 0 3-3 1 1 5 1 7

DISCLOSURE OF THE INVENTION

[Problems to be solved by the invention]

The present invention provides a working machine capable of correcting the position of a tool attached to a tool holder with high accuracy in the order of microns in the radial direction of the tool holder with a simple configuration and control. For the purpose. [Means for Solving the Problems]

The present invention includes a tool holder that can rotate integrally with a spindle, an elastic holder portion having a ring shape that forms an open end portion with one end fixed to the tool holder and a tool attached to the other end, An end projecting outward in the axial direction of the elastic holder portion, and an operation shaft member rotatable relative to the tool holder, and a rotational operation of the operation shaft member, the diameter of the open end portion A conversion mechanism for converting into a direction expansion / contraction operation, and a support mechanism that is disposed outside the tool holder and connected to the operation shaft member to rotate the operation shaft member relative to the tool holder. It has.

The work machine preferably includes a connection confirmation mechanism that detects that the operating shaft member and the support mechanism are connected.

Further, the conversion mechanism is disposed inward of the elastic holder portion, and a taper means capable of expanding and contracting the open end portion in the radial direction by advancing and retreating in the axial direction of the elastic holder portion, and the rotation operation of the operating shaft member, It is preferable that the screw means for converting the taper means into the axial movement of the taper means.

Furthermore, the taper means has an inner peripheral contact formed on the inner peripheral surface of the elastic holder portion. A taper member that is externally mounted on the operating shaft member, rotates integrally with the elastic holder portion, and is movable back and forth in the axial direction of the elastic holder portion, and is formed on the outer peripheral surface of the taper member. It is preferable that at least the outer peripheral contact surface constitutes a tapered surface.

In addition, the screw means is fixed to the tool holder and is disposed around the operating shaft member, and is interposed between the outer periphery of the operating shaft member and the fixed screw member and the taper member. And a movable screw member that rotates integrally with the operating shaft member and is movable back and forth in the axial direction of the operating shaft member, and a first female screw is formed on an inner peripheral surface of the fixed screw member A second female screw set at a different pitch from the first female screw is formed on the inner peripheral surface of the tapered member, and the outer peripheral surface of the movable screw member is screwed into the first female screw. It is preferable that a first male screw and a second male screw threadably engaged with the second female screw are formed.

Further, the support mechanism includes a spline hole formed in the axial direction at a distal end portion of the operation shaft member, a support shaft member having a spline shaft or spline hole coupled to the spline shaft, and the support shaft member. It is preferable that the housing includes a housing that can move forward and backward in the axial direction of the member and cannot rotate, and an elastic member that is disposed in the housing and presses the support shaft member toward the operation shaft member.

Furthermore, the support mechanism includes a support shaft member that is inserted into a coupling hole formed in a radial direction at a distal end portion of the operating shaft member, and the support shaft member moves forward and backward in the radial direction of the operating shaft member. The housing preferably includes a non-rotatable housing, and an elastic member that is disposed in the housing and presses the support shaft member toward the operation shaft member.

In addition, the support shaft member preferably has a coolant hollow hole. -The support mechanism further includes: a rack portion that engages with a pinion portion formed at a distal end portion of the operating shaft member; a rack shaft member that fixes the rack portion and is movable forward and backward in the radial direction of the operating shaft member; An elastic member that presses the rack shaft member toward the operating shaft member; It is preferable to have

【The invention's effect】

In the work machine according to the present invention, when the operation shaft member is rotated relative to the tool holder in a state where the operation shaft member is coupled to the support mechanism, the conversion mechanism rotates the operation shaft member. The motion is converted into a radial expansion / contraction motion of the open end of the elastic holder. For this reason, the tool to which the open end is attached is adjusted (corrected) in the radial direction of the tool holder.

Therefore, for example, when the tool holder is rotated by a predetermined angle through the angle indexing function of the spindle that is the machining center spindle while the operating shaft member is connected to the support mechanism, the tool holder is attached to the elastic holder part. The tool being moved can be corrected and moved with high accuracy in the radial direction of the tool holder.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a perspective explanatory view of a machine tool 10 that is a work machine according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional explanatory view of a main part of the machine tool 10.

The machine tool 10 includes a main body 12, and a housing 14 is mounted on the main body 12 so as to be slidable in the X-axis direction, the Y-axis direction, and the Z-axis direction. When a spindle (main shaft) 16 is rotatably provided on the housing 14 via a bearing 18, a tool holder 20 is detachably attached to the spindle 16. As shown in FIG. 2, the tool holder 20 has an open end to which one end is fixed to the tool holder 20 and a tool such as a blade tool 2 2 a or 2 2 b is attached to the other end. Ring-shaped elastic holder portion 24 that forms the portion 24 a, and the end protrudes outward in the axial direction of the elastic holder portion 24 and is rotatable relative to the tool holder 20 An actuating shaft member 26, and a conversion mechanism 28 that converts the rotational operation of the actuating shaft member 26 into the expanding and contracting operation in the radial direction of the open end 24a are mounted. As shown in FIGS. 2 and 3, the elastic holder portion 24 is provided with a base portion 30 that is fixed to the tip of the tool holder 20. When the base body 30 is provided with a ring body 3 2 In both cases, a bank part (deformation vertex part) 3 4 a, 3 4 b to which the cutting tool 2 2 a, 2 2 b is exchangeably attached is attached to the open end part 2 4 a side of the ring body 3 2. Then, bulging portions 3 6 a and 3 6 b orthogonal to the puncture portions 3 4 a and 3 4 b are formed (see FIG. 3).

The operating shaft member 26 has a shaft portion 38, and this shaft portion 38 is fitted into a stepped hole portion 40 formed in the center of the tool holder 20. A head portion 42 fixed to the shaft portion 3 8 is disposed at an intermediate portion of the stepped hole portion 40, and a large diameter portion of the stepped hole portion 40 is provided with a stopper 4 4 Is placed immovable. The actuating shaft member 26 has a spline hole 48 formed at an end portion 46 protruding outward in the axial direction of the elastic holder portion 24.

The conversion mechanism 28 is disposed inside the elastic holder portion 24, and has a taper means 50 that can expand and contract the open end portion 24a in the radial direction by moving forward and backward in the axial direction of the elastic holder portion 24. And screw means 52 for converting the rotational movement of the operating shaft member 26 into the axial movement of the taper means 50.

The taper means 50 is connected to inner peripheral contact surfaces 5 4 a, 5 4 b formed on the inner peripheral surfaces of the bank portions 3 4 a, 3 4 b constituting the elastic holder portion 24, and the operating shaft member 26. A tapered member 56 that rotates integrally with the elastic holder portion 24 and is movable back and forth in the axial direction of the elastic holder portion 24; and an outer peripheral surface of the tapered member 56. The inner peripheral contact surfaces 5 4 a and 5 4 b have outer peripheral contact surfaces 58 in sliding contact.

The inner contact surface 5 4 a, 5 4 b and the outer contact surface 5 8 are at least radially inward as the outer contact surface 5 8 moves in the Z 1 axis direction (tool holder 20 side). When the tapering member 56 moves in the Z1 axis direction, the open end 24a is elastically deformed into an elliptical shape. Alternatively, the open end 24a may be elastically deformed into an elliptical shape when the tapering member 56 is moved in the Z2 axis direction.

As shown in FIG. 3, the tapering member 56 moves in the axial direction of the elastic holder portion 24 via the phase pins 59a, 59b provided on the bulging portions 36a, 36b. Free and The elastic holder portion 2 is configured to be non-rotatable.

The screw means 52 is fixed to the tool holder 20 and fixed around the operating shaft member 26, and the outer periphery of the operating shaft member 26 and the fixed screw member 60. And a taper member 56, and a movable screw member 62 that rotates integrally with the operating shaft member 26 and is movable back and forth in the axial direction of the operating shaft member 26. The actuating shaft member 26 and the movable screw member 62 are engaged via the parallel keyway 6 4 and the parallel key 6 6.

A first female screw 68a is formed on the inner peripheral surface of the fixing screw member 60, and a second pitch set at a different pitch from the first female screw 68a is formed on the inner peripheral surface of the tapering member 56. An internal thread 6 8 b is formed. On the outer peripheral surface of the movable screw member 62, there are formed a first male screw 70 a that is screwed to the first female screw 6 8 a and a second male screw 70 b that is screwed to the second female screw 6 8 b. The The first and second female screws 6 8 a and 68 b and the first and second male screws 70 0 a and 7 Ob may be configured as right-hand screws or left-hand screws. As shown in FIG. 1, on the table 71 provided outside the tool holder 20, the working shaft member 26 is connected to the working shaft member 26 and the working shaft member 26 is connected to the tool holder 20. On the other hand, a support mechanism 72 for rotating relative to it is arranged.

As shown in FIG. 4, the support mechanism 72 includes a support shaft member 7 6 having a spline shaft 7 4 coupled to a spline hole 48 formed in the axial direction at the distal end portion of the operation shaft member 26, and The support shaft member 76 is disposed in the housing 78 so that the support shaft member 76 can move forward and backward in the axial direction of the operation shaft member 26 and cannot rotate, and the support shaft member 76 is operated as described above. And a spring (elastic member) 80 that presses toward the shaft member 26.

On the outer peripheral surface of the support shaft member 76, a groove portion 8 2 is formed over a predetermined width dimension. On the other hand, the housing 78 is inserted into the groove portion 82 to rotate the support shaft member 76. In addition, stopper pins 84 that restrict the movement distance in the axial direction are provided. The support shaft member 7 6 usually has a shoulder portion 8 6 through the elastic force of the spring. 8 Abuts 8.

A connection confirmation mechanism 90 for detecting that the operation shaft member 26 and the support mechanism 72 are connected is provided at the rear end portion of the support shaft member 76. The connection confirmation mechanism 90 includes a large-diameter contact portion 92 and a small-diameter contact portion 94 provided at the rear end portion of the support shaft member 76, and the large-diameter contact portion 92. While detecting that the member 26 and the support shaft member 76 are securely connected, the operation shaft member 26 and the support shaft member 76 are connected by engaging with the small diameter contact portion 94. And a switch 96 for detecting that it is defective.

The operation of the machine tool 10 according to the first embodiment configured as described above will be described below.

First, as shown in FIG. 5, machining is performed on the hole 9 8a of the cylindrical body 9 8 of the workpiece (for example, the cylinder block of the engine) using the new blade tools 2 2a and 2 2b. At that time, the elastic holder portion 24 is not subjected to the diameter expansion operation by the conversion mechanism 28. Next, when the cutting edges of the blade tools 2 2 a and 2 2 b are worn, the position of the blade tools 2 2 a and 2 2 b is adjusted (corrected) radially outward via the conversion mechanism 28. Specifically, the spindle 16 moves to the support mechanism 72 side under the moving action of the housing 14. For this reason, the operating shaft member 26 mounted on the tool holder 20 is arranged coaxially with the support shaft member 7 6 constituting the support mechanism 7 2 in the axial direction (Z 2 axial direction). Then, the spline shaft 74 of the support shaft member 76 is inserted into the spline hole 48 of the operating shaft member 26 (see FIG. 4).

When the tool holder 20 is further moved in the Z 2 axis direction, the spline shaft 7 4 comes into contact with the end surface of the spline hole 48, and the support shaft member 7 6 resists the spring 80 and is in the Z 2 axis direction. Move to. Then, the tool holder 20 is stopped after moving to a preset position. At that time, as shown in FIG. 6, the switch 96 constituting the connection confirmation mechanism 90 engages with the large-diameter contact portion 92 provided at the rear end portion of the support shaft member 76, so that the operating shaft It is detected (ON state) that the member 26 and the support shaft member 76 are securely connected. On the other hand, as shown in FIG. 7, when the spline shaft 7 4 is not coupled to the spline hole 48, the switch 9 6 is supported by the support shaft member 7 while the tool holder 20 is stopped at a preset position. 6 is engaged with a small diameter contact portion 94 provided at the rear end portion. Therefore, it is detected (off state) that the operating shaft member 26 and the support shaft member 76 are poorly connected. For this reason, the above operation is performed again to securely connect the spline shaft 7 4 and the spline hole 48.

When it is detected that the operation shaft member 26 and the support shaft member 76 are securely connected, the spindle 16 is rotated by a predetermined angle via the indexing function of the machine tool 10. As a result, the tool holder 20 rotates integrally with the spindle 16, and the elastic holder portion 24 fixed to the tool holder 20 rotates.

On the other hand, the operation shaft member 26 is connected to the support shaft member 76 6 and its rotation is restricted. Therefore, the operating shaft member 26 rotates relative to the inertia holder portion 24. Hereinafter, for simplicity of explanation, it is assumed that the elastic holder portion 24 stops and the operating shaft member 26 rotates with respect to the elastic holder portion 24.

When the operating shaft member 26 is rotated by a certain angle in the direction in which the screw means 52 is screwed, the movable screw member 6 2 engaged with the operating shaft member 26 via the parallel key groove 6 4 and the parallel key 6 6 is Rotate integrally with the operating shaft member 26. Here, a first male screw 70 a and a second male screw 70 b having different pitches are formed on the outer peripheral surface of the movable screw member 62, respectively, and the first male screw 70 a and the second male screw 7 are formed. 0 b is screwed into the first female screw 6 8 a of the fixing screw member 60 and the second female screw 6 8 b of the tapering member 56.

Further, since the fixing screw member 60 is fixed to the tool holder 20, it is stopped integrally with the elastic holder portion 24 and does not rotate. On the other hand, the tapering member 56 is slidably contacted with the elastic holder portion 24, and is axially movable and integrated in the rotational direction via the phase pins 59a and 59b. .

Therefore, when the operating shaft member 26 rotates, the movable screw member 6 2 rotates, and the first female screw 6 8 a and the second female screw 6 8 b (first male screw 70 and second male screw 70 b) and No pick The taper ring member 56 slides inward in the axial direction (Z 1 axial direction) due to the difference in angle. At that time, the outer peripheral contact surface 58 of the tapering member 56 and the inner peripheral contact surfaces 54 a and 54 b of the puncture portions 34 a and 34 b constituting the elastic holder portion 24 are brought into sliding contact with each other.

As a result, when the tapering member 56 moves inward in the axial direction, the open end 24 a is elastically deformed into an elliptical shape via the taper means 50. Then, the blade tools 22a and 22b attached to the punctures 34a and 34b, which are the two deformed apexes of the open end 24a, move outward in the radius and compensate for the wear state. I do. Therefore, as shown in FIGS. 8 and 9, the hole 98a of the cylindrical body 98 can be processed by using the corrected and corrected blade tools 22a and 22b.

The above-described operation will be described more specifically. The movable screw member 62 is a right-hand screw, and the pitch of the first male screw 70a is larger than the pitch of the second male screw 70b. For example, the pitch difference is 0.1 mm. Suppose that Then, when the movable screw member 62 is rotated by 72 degrees clockwise, the tapering member 56 moves by 0.02 mm in the Z 1 axis direction.

Furthermore, when the taper contact portion (inner peripheral contact surfaces 54a, 54b and outer peripheral contact surface 58) has a taper ratio 56 in the axial direction to the radial direction of 10: 1, When moving 0.02 mm in one axial direction, the banks 34 a and 34 b of the open end 24 a, that is, the blade tools 22 a and 22 b, are only 0.02 mm radially outward. It will be corrected. As a result, the blade tools 22a and 22b have an effect that the blade edge adjustment of micron order is performed with high accuracy.

Moreover, in the first embodiment, the open end 24a of the elastic holder portion 24 is deformed by inertia in an elliptical shape, and the blade tools 22a and 22b are arranged to face each other with the same mass. Therefore, the elastic holder portion 24 is adjusted (corrected) in the radial direction of the tool holder 20 with the blade tools 22a and 22b maintained in the state where the center of gravity of the elastic holder portion 24 is maintained on the rotation axis. . As a result, the tool holder 20 can efficiently perform highly accurate machining operations on the cylinder 98 without moving the balance. Become.

Moreover, in the first embodiment, two blade tools 2 2 a and 2 2 b are provided. Therefore, by setting the diameter difference, one of the blades, for example, the blade tool 2 2 a can be used as the leading blade, and the other blade, for example, the blade tool 2 2 b can be used as the finishing blade. High-accuracy boring can be performed with the final finishing allowance as the stable minimum allowance.

When only the blade tool 2 2 a is used, it can be dealt with by attaching a balance dummy to the bank part 3 4 b. In addition, the number of bank parts can be changed in various ways. For example, three bank parts can be provided, and two blade tools can be used as medium finishing blades, while one blade tool can be used as a finishing blade. Is possible. Furthermore, while the spline shaft 4 is provided in the support shaft member 7 6 while the spline shaft 7 4 is provided in the support shaft member 7 6, the spline shaft is provided in the operation shaft member 2 6. In addition, a spline hole may be provided in the support shaft member 76. FIG. 10 is an explanatory cross-sectional view of a support mechanism 10 0 constituting a machine tool according to a second embodiment of the present invention. The same constituent elements as those of the machine tool 10 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

The support shaft member 76 constituting the support mechanism 100 has a pipeline shaft 74, and a guide portion 102 is provided at the tip of the pipeline shaft 74 by chamfering. A hollow hole 10 4 for coolant is formed in the pipeline shaft 74 along the axial center.

In the second embodiment configured as described above, a guide portion 102 is provided at the tip of the pipeline shaft 74. For this reason, even if the phase angle between the spline shaft 4 4 of the operating shaft member 26 and the spline shaft 7 4 of the supporting shaft member 7 6 is slightly deviated, the operating shaft 10 Member 26 can be operated to correct phase angle deviations.

In addition, the support shaft member 7 6 is provided with a hollow hole 10 4 for coolant. . For this reason, it is possible to forcibly remove the cutting waste and the like at the joint by flowing the coolant during joining.

FIG. 11 is a perspective explanatory view of a machine tool 120 that is a working machine according to a third embodiment of the present invention, and FIG. 12 is an explanatory sectional view of a main part of the machine tool 120. is there. The tool holder 20 constituting the machine tool 120 is provided with an operating shaft member 12 2 that is rotatable relative to the tool holder 20. At the front end of the actuating shaft member 1 2 2, coupling holes 1 2 4 a and 1 2 4 b are formed that pass through perpendicularly to each other in the radial direction.

As shown in FIG. 11, outside the tool holder 20, a support connected to the operating shaft member 1 2 2 for rotating the operating shaft member 1 2 2 relative to the tool holder 20. Mechanism 1 2 6 is arranged. As shown in FIG. 12, the support mechanism 1 2 6 includes a coupling pin portion inserted into the coupling hole 1 2 4 a or 1 2 4 b formed in the radial direction at the distal end portion of the operating shaft member 1 2 2. A support shaft member 1 3 0 having 1 2 8 is provided.

As shown in FIG. 13, the connecting pin portion 1 2 8 has a straight portion 1 2 8 a and a tapered portion 1 2 8 b, and the diameter of the straight portion 1 2 8 a is the connecting hole 1 2 4 The diameter is set smaller than the opening diameters of a and 1 2 4 b. A gap S is formed in the coupling holes 1 2 4 a and 1 2 4 b in a state where the straight portion 1 2 8 a is inserted. A hollow hole 10 4 for coolant is formed in the support shaft member 1 30.

In the third embodiment configured as described above, the correction of the blade tip positions of the blade tools 2 2 a and 2 2 b is basically performed in the same manner as in the first embodiment. Briefly, as shown in FIG. 12, the coupling shaft 1 2 4 a (or 1 2 4 b) of the operation shaft member 1 2 2 and the support shaft member 1 3 constituting the support mechanism 1 2 6 The housing 14 moves toward the support mechanism 1 26 along the X-axis direction in a state where the 0 coupling pins 1 2 8 are arranged on the same axis.

For this reason, as shown in FIG. 13, the coupling pin 1 2 8 is inserted into the coupling hole 1 2 4 a, and the operation shaft member 1 2 2 and the support shaft member are connected via the connection confirmation mechanism 90. It is detected whether or not 1 3 is securely connected. And support shaft member 1 2 2 and support When it is detected that the shaft member 1 3 0 is securely connected, the spindle 16 is rotated by a predetermined angle and the conversion mechanism 28 is driven, and the blade tools 2 2 a and 2 2 b are accompanied by wear. A radial correction movement is performed.

Therefore, in the third embodiment, the same effect as in the first embodiment can be obtained. In addition, as shown in FIG. 13, the connecting pin portion 1 2 8 has a straight portion 1 2 8 a and a tapered portion 1 2 8 b, and the diameter of the straight portion 1 2 8 a is a binding hole The diameter is set smaller than the opening diameter of 1 2 4 a and 1 2 4 b. As a result, there is an advantage that mechanical errors in the indexing angle and the coupling position of the machine tool 120 can be absorbed by the gap S and the tapered portion 1 2 8 b.

In addition, although two coupling holes 1 2 4 a and 1 2 4 b are formed at the distal end portion of the operating shaft member 1 2 2, the present invention is not limited to this. For example, the number of holes can be set based on the correction amount and the index angle, and it is not necessary to provide it every 90 degrees.

FIG. 14 is a perspective explanatory view of a machine tool 140 that is a work machine according to a fourth embodiment of the present invention, and FIG. 15 is a cross-sectional explanatory view of a main part of the machine tool 140. is there. An operation shaft member 14 2 that is rotatable relative to the tool holder 20 is disposed in the tool holder 20 constituting the machine tool 140. A pinion part (circular beon) 1 4 4 is formed at the front end of the operating shaft member 1 4 2.

A support mechanism 1 4 6 is disposed outside the tool holder 20, and is connected to the operation shaft member 1 4 2 to rotate the operation shaft member 1 4 2 relative to the tool holder 2 0. . As shown in FIGS. 14 and 15, the support mechanism 1 4 6 is a support shaft member in which a rack portion 1 4 8 that engages with the pinion portion 1 4 4 of the operating shaft member 1 4 2 is formed at the tip portion. 1 5 0 provided.

In the fourth embodiment configured as described above, the housing 14 moves to the support mechanism 14 6 side along the X-axis direction when correcting the cutting edge positions of the cutting tools 2 2 a and 2 2 b. As a result, the pinion portion 14 4 of the operating shaft member 14 2 engages with the rack portion 14 8 constituting the support mechanism 14 46 (see FIG. 16). When the connection confirmation mechanism 90 detects that the pinion portion 14 4 and the rack portion 1 4 8 are securely engaged, the spindle 16 is moved by a predetermined distance in the Y-axis direction. Therefore, the operating shaft member 14 2 is rotated by the amount of rotation angle corresponding to the movement distance of the spindle 16 in the Y-axis direction converted by the circular pitch circle of the pinion portion 14 4.

As a result, the operating shaft member 14 2 is rotated by a predetermined angle to drive the conversion mechanism 28, and the blade tools 2 2 a and 2 2 b are subjected to radial correction movement accompanying wear. For this reason, in the fourth embodiment, the same effect as in the first to third embodiments can be obtained.

[Brief description of the drawings]

【Figure 1】

1 is a perspective explanatory view of a machine tool that is a work machine according to a first embodiment of the present invention. 【Figure 2】

It is a section explanatory view of the machine tool.

[Figure 3]

It is front explanatory drawing of the elastic holder part which comprises the said machine tool.

[Figure 4]

It is a section explanatory view of a support mechanism which constitutes the machine tool.

[Figure 5]

It is explanatory drawing of the process by a new blade tool.

[Figure 6]

It is operation | movement explanatory drawing of the said support mechanism.

[Figure 7]

It is operation | movement explanatory drawing of the said support mechanism.

[Figure 8]

It is explanatory drawing of the process by the correct | amended blade tool.

[Figure 9] It is front explanatory drawing of the said heel holder part by which the blade tool was correct | amended.

[Fig. 10]

FIG. 11 is a cross-sectional explanatory view of a support mechanism constituting a machine tool according to a second embodiment of the present invention.

FIG. 10 is a perspective explanatory view of a machine tool that is a work machine according to a third embodiment of the present invention. [Fig. 1 2]

It is principal part cross-sectional explanatory drawing of the said machine tool.

[Figure 1 3]

FIG. 14 is an explanatory diagram of a connection state of an operation shaft member and a support shaft member constituting the machine tool.

FIG. 10 is a perspective explanatory view of a machine tool that is a work machine according to a fourth embodiment of the present invention. [Figure 15]

[Fig. 16]

It is explanatory drawing of the connection state of the operating shaft member and support shaft member which comprise the said machine tool.

[Explanation of symbols]

1 0, 1 2 0, 1 40 ... Machine tool 1 6 ... Spindle

2 0… Tunore Honoreda 22 a, 2 2 b… Blade tool

24… Elastic holder 24 a… Open end

2 6, 1 2 2, 1 4 2 ... Operation shaft member 28 ... Conversion mechanism

34 a, 3 4 b… Bank part 48… Spline hole

5 0 ··· Taper means 5 2 ··· Screw means

54 a, 54 b… Inner contact surface 56… Tapering member ... Outer peripheral contact surface 6 0 ... Fixing screw member

... Moveable screw member 6 8 a, 6 8 b ... Female screw

a, 70 b ... Male thread 72, 1 00, 1 2 6, 1 46 ... Support mechanism ... Spline shaft 7 6, 1 3 0, 1 5 0 ... Support shaft member ... Spring 9 0 ... Connection confirmation mechanism

4… Hollow hole 1 24 a, 1 24 b… Connection hole

8… Connecting pin part 1 44… Pinion part

8 ... Rack part

Claims

The scope of the claims

[Claim 1]

A tool holder that can rotate integrally with the spindle;

An elastic holder part having a ring shape forming an open end part to which one end is fixed to the tool holder and a tool is attached to the other end;

An end portion projecting axially outward of the elastic holder portion, and an operation shaft member rotatable relative to the tool holder;

A conversion mechanism for converting the rotation operation of the operating shaft member into a radial expansion / contraction operation of the open end; and

A support mechanism disposed outside the tool holder, coupled to the operating shaft member and configured to rotate the operating shaft member relative to the handle holder;

A work machine comprising:

[Claim 2]

2. The work machine according to claim 1, further comprising a connection confirmation mechanism that detects that the operating shaft member and the support mechanism are connected.

[Claim 3]

The work machine according to claim 1 or 2, wherein the conversion mechanism is disposed inward of the elastic holder portion, and the open end portion can be expanded and contracted in a radial direction by moving forward and backward in the axial direction of the elastic holder portion. A taper means;

Screw means for converting the rotational movement of the operating shaft member into the axial movement of the taper means;

A work machine comprising:

[Claim 4]

The work machine according to claim 3, wherein the taper means includes an inner peripheral contact surface formed on an inner peripheral surface of the elastic holder portion,

A tapering member that is externally mounted on the operating shaft member, rotates integrally with the elastic holder portion, and is movable back and forth in the axial direction of the elastic holder portion; An outer peripheral contact surface formed on an outer peripheral surface of the taper member and in sliding contact with the inner peripheral contact surface;

Have

A working machine characterized in that at least the outer peripheral contact surface forms a tapered surface.

[Claim 5]

The work machine according to claim 3 or 4, wherein the screw means is fixed to the tool holder, a fixed screw member arranged around the operating shaft member, an outer periphery of the operating shaft member, and the fixing A movable screw member that is interposed between the screw member and the tapering member, and that rotates integrally with the operating shaft member and is movable back and forth in the axial direction of the operating shaft member;

With

A first female screw is formed on the inner peripheral surface of the fixing screw member,

A second female screw set at a different pitch from the first female screw is formed on the inner peripheral surface of the taper member,

On the outer peripheral surface of the movable screw member, a first male screw screwed into the first female screw, a second male screw screwed into the second female screw,

A working machine characterized in that is formed.

[Claim 6]

The work machine according to claim 1, wherein the support mechanism includes a support shaft member having a spline hole formed in an axial direction at a distal end portion of the operating shaft member or a spline shaft coupled to the spline shaft or a spline hole.

A housing in which the support shaft member is disposed so as to be movable forward and backward in the axial direction of the operating shaft member and not rotatable;

An elastic member disposed in the housing and pressing the support shaft member toward the operating shaft member;

A work machine comprising:

[Claim 7]

The work machine according to claim 1, wherein the support mechanism includes a support shaft member inserted into a coupling hole formed in a radial direction at a distal end portion of the operating shaft member,

A housing in which the support shaft member is disposed so as to be movable back and forth in the radial direction of the operating shaft member and non-rotatable;

An elastic member that is disposed in the housing and presses the support shaft member toward the operation shaft member;

A work machine comprising:

[Claim 8]

The work machine according to claim 6, wherein the support shaft member has a hollow hole for coolant.

[Claim 9]

The work machine according to claim 1, wherein the support mechanism includes a rack portion that engages with a pinion portion formed at a distal end portion of the operating shaft member,

A work machine comprising: a rack shaft member that fixes the rack portion and is movable forward and backward in a radial direction of the operation shaft member; and an elastic member that presses the rack shaft member toward the operation shaft member.