JPH0957564A - Automatic tool exchanging device for line boring machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic tool exchanging device for a line boring machine whose configuration and operation can be simplified, in which the time for exchanging the tool can be shortened, and which is excellent in safety. SOLUTION: A line bar 2 is held by a magazine as the bar is suspended, and the line bar 2 can be attached/detached from a magazine 3 in the horizontal direction at a line bar exchanging position (A). In addition, the line bar 2 is stored in the magazine 3 in such a manner that the height of a grip part 2a, at which the magazine main body 3 grips the line bar 2, becomes constant. The line bar 2 that is in the state of being suspended is supported by a supporting means 6 at one or more places so as not the tip of the line bar 2 to oscillate during the rotation for indexing. With this contrivance, the line bar can be attached to or detached from the magazine only by moving the magazine main body 3 in the horizontal direction, and, even if the line bar 2 is rotated at a high speed for indexing, the tip of the line bar 2 will not oscillate. Thus, an automatic tool exchanging device having high safety can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line boring machine for machining a plurality of machined holes (workpieces) formed on the same center line with a long line boring bar (hereinafter referred to as a line bar). The present invention relates to an automatic tool changer for a line boring machine that automatically exchanges a line bar stored in a line bar storage magazine with a spindle of the line boring machine.

[0002]

2. Description of the Related Art Conventionally, a line boring machine for boring a plurality of holes formed on the same center line, such as a cylinder block, with a line bar supporting both ends of a boring bar has been used to adjust the machining diameter. The method of providing flexibility is well known in Japanese Patent Laid-Open No. 62-4504 and Japanese Utility Model Laid-Open No. 3-82130. In such a line boring machine, a line bar storage magazine is provided which holds the line bars in a horizontal state in parallel or on the same pitch circle with the axis of the line bar horizontal, and the indexing operation of the line bar storage magazine and the axis movement of the spindle. The line bar is being replaced depending on the operation. By the way, since the conventional line boring machine equipped with an automatic tool changer holds a long line bar in a horizontal state, the line bar storage magazine becomes large and the installation floor area becomes large. There was a problem that the installation floor area of itself increased. Therefore, in Japanese Utility Model Laid-Open No. 6-83235 and Japanese Utility Model Laid-Open No. 7-24638, the line bar is held vertically in the line bar storage magazine, and the line bar is exchanged between the line bar storage magazine and the spindle. Techniques for performing operations are disclosed.

[0003]

However, the above-mentioned conventional automatic tool changer for a line boring machine has the following problems. That is, the line bar is
Since the tool shank is inserted and held in the cylindrical holding part provided in each line bar storage part of the line bar storage magazine, the line bar is grasped and lifted in order to take it out from the line bar storage magazine. It is necessary to provide a shaft and a drive mechanism for lifting, which complicates the main body of the tool changing device and causes a long time for changing the line bar. In addition, since the long line bar projects upward from the line bar storage magazine, it is difficult to move the line bar storage magazine at high speed, and the speed cannot be increased. Further, if the speed is forcibly increased, a safety problem occurs. Furthermore, the tip (upper end) of the line bar held in each line bar storage section
However, there is also a problem in that the holder is apt to rock during the indexing rotation, and an excessive load is applied to the holder by this rocking, so that the holder must be made sturdy.

[0004]

In order to solve the above problems, a line boring machine of the present invention is a line for machining a machining hole of a workpiece formed on the same center line with a line bar mounted on a spindle. It is installed in a bowling machine,
A line bar storage magazine that stores a plurality of the line bars in an indexable manner and a line bar automatic tool changing device that exchanges the line bars between the spindle and a state in which the line bars are suspended vertically. Provided in each line bar storage part of the line bar storage magazine for holding the line bar and the line bar storage magazine for storing the line bar, and engaging the part of the line bar with the line bar storage part. And a line bar holding portion for holding the line bar in the horizontal direction so that the line bar can be attached and detached by moving the line bar in a horizontal direction, and one or more line bars are provided in each of the line bar storage portions along the axis of the line bar. Support means for supporting one end of the line bar so as not to swing during indexing rotation of the bar, the main shaft of the line boring machine and the line bar housing. A base provided between the magazine and a transfer position provided on the base for exchanging a line bar with the spindle or the line bar storage magazine, and between the spindle and the line bar storage magazine. A line bar exchanging device body that moves back and forth between the retracted position, an advancing / retreating drive mechanism that moves the line bar exchanging device forward and backward on the base, and a swivel motion provided around the vertical axis of the tool exchanging device body. A possible arm, a swivel drive mechanism that is provided in the tool changer body, and that swivels the arm between a line bar transfer position on the spindle side and a transfer position on the line bar storage magazine side; A grip that is opened and closed by a plurality of gripping members that are provided at the tip and that are provided along the axis of the line bar and that are separated by a predetermined amount. And means, disposed between the shaft body and the arm, characterized by comprising the arm from the axis around the rotation driving mechanism for rotation of the arm.

In the line bar storage magazine, a base, a rotary shaft rotatably erected on the base, and a predetermined line bar that rotates the rotary shaft to form a predetermined line bar with the tool changer body. A rotary drive mechanism for indexing to the transfer position of the disk, a disk-shaped first rotary plate which is provided above the rotary shaft and rotates together with the rotary shaft, and a plurality of which are provided by equally dividing the circumference of the first rotary plate. At the same time, a semi-arcuate line bar receiving portion which is open to the outside and in which the shaft portion of the line bar can be freely inserted and removed is formed, and a plurality of flange portions of the line bar are placed and suspended at the peripheral edge of the line bar receiving portion. A mounting portion, a main body provided in each of the line bar accommodating portions, a line bar receiving portion formed in the main body and concentric with the line bar receiving portion of the mounting portion, and the line bar receiving portion. Line bar out An engaging member that is swingably provided on the mouth and is engageable with and disengageable from the line bar inserted into the line bar receiving portion; and a biasing means that constantly biases the engaging member to the side that abuts against the line bar. And a support portion provided below the first rotary plate and supporting the line bar at the tip end side of the line bar and restricting swing of the line bar during indexing rotation. You may comprise so that it may have a 2nd rotating plate.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
It will be described according to. FIG. 1 is a schematic view of an automatic tool changer for a line boring machine according to the present invention. As shown in the figure, the line bar storage magazine 3 for storing the line bar 2 in a vertically suspended state is provided near the bed 8 of the line boring machine. A rotary shaft 4 is rotatably provided upright in a line bar storage magazine 3, and a flange portion 2 formed on one side of the line bar 2 is a gripped portion.
The line bar 2 is hung by hooking a and a holding unit 7 is provided to hold the line bar 2 so as not to be separated from the line bar storage unit during the indexing rotation of the line bar 2 by the rotation of the rotating shaft 4. There is. The holding portion 7 is integrally attached to the rotary shaft 4 and is rotatable together with the rotary shaft 4, and one side thereof is open to the outside so that the line bar 2 can be moved only in the horizontal direction.
Can be attached to and detached from the line bar storage. The structure of the holding portion 7 is, for example, the shaft portion 2 of the line bar 2.
It is possible to use a publicly known member that includes a claw member that can be engaged with and disengaged from c and a biasing unit that constantly biases the claw member in a direction in which the claw member abuts the shaft portion 2c. In addition, in the axial direction of the line bar 2,
The tip of the line bar 2 is regulated so as not to swing during indexing rotation in the middle of the line bar 2 and near the tip on the other side. The support means 6 is attached to the rotary shaft 4 and is rotatable integrally with the rotary shaft 4, and is provided with a U-shaped groove that opens to the outside so that the shaft portion 2c of the line bar 2 has the groove. It is designed to prevent the line bar 2 from swinging on the tip end side by being inserted into. In FIG. 1, the supporting means 6 is illustrated at two positions on the way and the tip (lower end) side of the line bar 2, but depending on the length of the line bar 2 and the like, for example, the tip side of the line bar 2 is shown. There is no problem even if only one is provided.

A base 10 of the automatic tool changer 1 is provided between the line bar storage magazine 3 and the bed 8. On the base 10, there is provided a tool changer body 11 capable of reciprocating between the line bar storage magazine 3 and the bed 8 in the direction of arrow a in FIG. The reciprocating movement of the tool changer main body 11 is performed by an advancing / retreating moving unit which is provided on the base 10 and includes an advancing / retreating moving mechanism 10a including a guide, a ball screw and the like, and a driving source 10b such as a motor and an actuator. Further, the tool changer main body 11 is provided with a single arm 12 (hereinafter, referred to as an arm) which is rotatable about the axis of the swing shaft 11a in the direction of arrow b in a horizontal plane. This arm 12 is swung between a retracted position C on the side of the line bar storage magazine 3 and a transfer position B on the side of a spindle (not shown) of the line boring machine by the drive of a swivel drive mechanism 16 provided in the exchange device body 11. It At the tip of this arm 12, a gripping means 13 for gripping the line bar 2 is provided. The gripping means 13 grips two points of the flange portion 2a having the V groove of the line bar 2 and a gripped portion provided along the shaft portion 2c closer to the tip of the line bar 2 than the flange portion 2a. Two gripping claws 13a, which are separated by a predetermined amount,
13b, and the gripping claws 13a and 13b are opened and closed by a gripping means opening and closing mechanism (not shown) to form the flange portion 2.
A and the grasped portion are grasped or released. In this way, the line bar 2 is gripped by the two gripping claws 13a and 13b at the flange portion 2a and the gripped portion, so that the arm 12 can be swung and rotated later. Stable grip. The gripping means 13 is arranged around the axis of the arm 12 by a rotation drive means including a rotation drive mechanism 12b provided in the tool changer body 11 and a motor 12a for driving the rotation drive mechanism 12b. It can rotate in the direction of the middle arrow c.

In the arm 12, the gripping claws 13a and 13b of the gripping means 13 provided at the tip end are held in a state of being suspended in the line bar storage magazine 3, respectively, and the flange portion 2a of the line bar 2 and the above-mentioned. The line bar 2 is provided so as to coincide with the height position of the gripped portion, and the line bar 2 can be delivered and received only by moving the tool changing device body 11 along the base 10 in the horizontal direction. The forward / backward drive mechanism 10a, the turning drive mechanism 16, the turning drive mechanism 1
2b, a gripping means opening / closing mechanism (not shown) transmits the driving force of the cylinder, the rotary actuator, the drive motor, etc. to the gear mechanism, the rack and pinion mechanism, the screw mechanism, the worm / worm wheel mechanism, the cam mechanism, etc. Since this is a known mechanism that causes each moving body to operate, no further description will be given.

[Operation] With the above structure, the automatic tool changer of the present invention operates as follows. Line bar 2
The line bar storage magazine 3 is held in a suspended state in the line bar storage section. Since the line bar 2 is supported by the support means 6 at one or a plurality of points along the axis, the tip of the line bar 2 does not swing even during the indexing rotation of the line bar 2. The tool changer body 11 has a line bar storage magazine 3 on the base 10.
Side to the magazine side transfer position A, and the grip claw 13
The gripped portion provided along the flange portion 2a and the shaft portion 2c of the line bar 2 is gripped by a and 13b. Then, the line bar 2 is disengaged from the line bar storage portion of the line bar storage magazine 3 by moving in the opposite direction on the base 10. The tool exchanging device main body 11 retracts the gripping line bar 2 to a position where the gripped line bar 2 does not interfere with the line bar storage magazine 3 (this position is the magazine side retracted position C), and then a rotary drive mechanism is installed when necessary. The gripping means 13 is driven to rotate and the posture is changed from the state in which the line bar 2 is suspended to a vertical state in which the tip end is directed vertically upward.

Then, the arm 12 is swung in the horizontal plane by driving the swivel drive mechanism 11a, and the line bar 2 gripped while standing vertically to the gripping means 13 is swung from the retracted position C to the front position of the spindle. After this turning movement,
The rotation drive mechanism drives the arm 12 to rotate 90 degrees to change the posture of the gripped line bar 2 from the vertical posture to the horizontal posture. As a result, the axis line of the spindle that stands by behind the tool exchange position and the axis line of the line bar 2 coincide (this position is the spindle side transfer position B).

When the posture of the line bar 2 is changed to the horizontal state, the main shaft moves forward to mount the line bar 2. After the main shaft of the line bar 2 is mounted, the gripping means 13 releases the gripping of the line bar 2 and the advancing / retreating drive mechanism moves the tool changer main body 11 to the line bar storage magazine 3 side so that the arm 12 and the gripping means 13 and the like move to the line. Make sure that it does not interfere with each part of the bar and line boring machine (this position is the spindle side retracted position D). When replacing the line bar 2 that has been processed, the above operation is performed in reverse, and after the line bar 2 on the spindle side is stored in the line bar storage magazine 3,
A predetermined line bar 2 is attached to the spindle side.

[0012]

EXAMPLE A concrete example of the automatic tool changer of the present invention will be described in more detail with reference to FIGS. The tool changer body 11 is as described with reference to FIG. 1, and will not be described in detail here. FIG.
FIG. 4 is a side view illustrating the overall configuration of a line bar storage magazine. The base 10 which is the base of the line bar storage magazine 3 is common to the base 10 of the tool changer body 11 installed on the floor near the line boring machine. The base 10 is provided with a rotary drive motor 14 (hereinafter referred to as a motor 14) for indexing and rotating the line bar 2. The rotational drive of the motor 14 is transmitted to the rotary shaft 4 erected on the base 10 via an indexing mechanism 15 provided on the base 10. In addition, the upper end of the rotary shaft 4 is 4
Beam member 3c erected on the upper end of a pillar 3b erected in a corner
And is rotatably supported via a bearing 17. The motor 14 and the indexing mechanism 15 described above constitute a rotation driving means for indexing to the transfer position of the line bar.

Above the rotary shaft 4, the line bar 2 is fixed to the rotary shaft 4 and engages with the flange portion 2a of the line bar 2.
A first rotating plate 5 that supports the line bar 2 and a holding portion 7 of the line bar 2 that engages with the shaft portion 2c of the line bar 2 and stores the line bar 2 are provided. Further, on the lower side of the rotary shaft 4,
A second rotating plate 6, which is a supporting means for engaging with the tip of the line bar 2 and preventing the tip of the line bar 2 from swinging during indexing rotation, is fixed.

3A and 3B are explanatory views of the first rotary plate. FIG. 3A is a view taken in the direction II-II in FIG. 2, and FIG. 3B is a view taken in the direction III-III in FIG. Further, FIG. 4 is a view taken along the line IV-IV in FIG. As shown in FIG. 3A, on the upper surface side of the first rotary plate 5, the circumference of the circular first rotary plate 5 is equally divided into a plurality of locations (for example, 8 locations) on the same circumference. A mounting member 5a, which is a mounting portion for mounting the flange portion 2a of the line bar 2.
Is provided. Each of the mounting members 5a is formed with a semicircular line bar receiving portion 5b that is open to the outside, and the shaft portion 2c of the line bar 2 immediately below the flange portion 2a is inserted into the line bar receiving portion 5b. You can take it off. The flange 2a of the line bar 2 is placed on the peripheral edge of the line bar receiving portion 5b and is suspended. As described above, by suspending the line bar 2 on the first rotary plate 5, the total height of the line bar storage magazine 3 can be made constant, and the entire line bar storage magazine 3 is covered (see FIG. 2). (Shown by a middle phantom line), it is possible to improve the safety. As shown in FIG. 3B, the line bar 2 is engaged with the shaft portion 2c of the line bar 2 on the lower surface side of the first rotary plate 5 and corresponding to the mounting member 5a. A holding unit 7 that holds the storage unit is provided. The holding portion 7 is provided in the vicinity of the opening of the line bar receiving portion 7a formed concentrically with and in the same shape as the line bar receiving portion 5b, and swings in the horizontal direction to move the line. Shaft 2 of bar 2
c and an engaging member 18 that engages and disengages.

The engaging member 18 includes a shaft 18c provided on the first rotary plate 5, a lever 18b swinging about the shaft 18c, and a rotatable roller 18a provided at the tip of the lever 18b. It consists of Also, lever 1
8b is urged in the direction in which the roller 18a is constantly pressed against the shaft portion 2c of the line bar 2 by the urging means 19 provided closer to the rotary shaft 4 than the shaft 18c. As shown in FIG. 5, the urging means 19 includes a hole 19c bored in the holder body 7b toward the lever 18b and a pressing member fitted in the hole 19c so as to be movable back and forth. 19b
And a spring 19a for constantly urging the pressing member 19b against the lever 18b. Then, the line bar 2 is pulled outward from the line bar receiving portion 7a or inserted into the line bar receiving portion 7a against the urging force of the urging means 19, so that the shaft portion 2c of the line bar 2 rolls. The line bar 2 can be attached to and detached from the holding portion 7 by abutting the 18a and swinging the lever 18b.

As shown in FIG. 4, the second rotary plate 6 as a support means for supporting the tip end side of the line bar 2 and restricting the swinging of the line bar 2 on the tip end side during indexing rotation is the first. Like the rotary plate 5, it is integrally attached to the rotary shaft 4. The line bar receiving portion 5 is provided on the upper surface of the second rotating plate 6.
b and 7a are concentric and have the same shape (semi-arcuate shape) supporting portion 6
A support member 6a having b formed therein is attached. The shaft portion 2c is adapted not to swing by being inserted into the support portion 6b.

[Description of Lock Mechanism] In this embodiment, the lever 18b is locked so as not to swing at a position other than the transfer position A where the line bar 2 is transferred to and from the tool changer main body 11, The line bar 2 accommodated in the line bar accommodating portion does not come off from the holding portion 7. The lock mechanism 20 that locks the lever 18b at a position other than the line bar transfer position A will be described below. 5 and 6 are explanatory views of the configuration and operation of the lock mechanism in this embodiment, FIG. 5 is an enlarged explanatory view in which a part of the holding portion is broken, and FIG. 6 is a view taken in the direction of arrows I-I in FIG. ,
(A) shows a locked state, and (B) shows an unlocked state. A stopper 24 is erected on the holding portion main body 7b so as to face the biasing means 19, and the lever 18b is arranged between the stopper 24 and the biasing means 19. When the rear end side of the lever 18b comes into contact with the stopper 24, the lever 18b is restricted from rotating more than a certain amount by the urging force of the urging means 19 in a state where the line bar 2 is not housed in the holding portion 7. There is.

A lock pin 21 is provided in the vertical direction on the rear end side of the lever 18b and on the opposite side of the stopper 24, and the rear end portion of the lever 18b contacts the outer peripheral surface of the lock pin 21. Thus, the lever 18b is regulated so as not to swing when the shaft portion 2c of the line bar 2 is inserted into the line bar receiving portion 7a. The lock pin 21 has a hole 22 formed in the holder body 7b.
The compression coil spring 23 is housed inside and can move up and down with respect to the axial direction parallel to the rotating shaft 4, that is, the first rotating plate 5, and is always upward by the compression coil spring 23 fitted in the hole 22. The upper end of the first rotary plate 5 is constantly protruded from the upper surface of the first rotary plate 5. In FIG. 6, reference numeral 20a is a cover fitted into the opening of the hole 22 and serves to guide the lock pin 21 up and down.
Reference numeral 21b is a stopper pin formed so as to project from the outer peripheral surface of the lock pin 21 so as to prevent the lock pin 21 from protruding from the hole 22 by coming into contact with a groove formed in the cover 20a. There is one that restricts 21 so that it does not rotate around the axis in the hole 22.

A lever 18 is provided in the middle of the lock pin 21.
A U-shaped notch 21a into which the rear end of the b can be inserted is formed. Lock pin 2 at transfer position A of line bar 2
When 1 is forcibly pushed down by a cam 25 or a cylinder, which is a lock releasing means provided in a fixed portion such as the base body of the line bar storage magazine 3, the cutout portion 21a faces the rear end portion of the lever 18b. To the position.
This allows the rear end of the lever 18b to be freely inserted into and removed from the notch 21a, so that the lever 18b can swing.
The line bar 2 can be attached to and detached from the holding portion 7. In addition,
The lock mechanism is not limited to the one described above. For example, a cylinder is provided at the transfer position A of the line bar 2 so that the piston rod, which is movable back and forth, can be inserted into and removed from the hole 22, and the tip of the piston rod is By inserting the hole into the hole 22 and bringing the rear end of the lever 18b into contact with the outer periphery of the piston rod, the lever 18b is locked.
Alternatively, the piston rod may be retracted so that the tip of the piston rod is pulled out of the hole 22 so that the piston rod is unlocked. Further, in FIG. 3A, reference numeral 26 is a manual handle for forcibly pushing down the lock pin 21 manually to unlock the lever 18b, and the handle is turned in the direction indicated by the chain double-dashed line in the figure. By moving the line bar 2, the line bar 2 can be attached and detached at the manual line bar exchange position E other than the transfer position A. That is, manual tool change can be performed at this position E. Further, reference numeral 27 in FIG. 3 is a known detecting means for detecting the rotational position of the rotary shaft 4, and has a circumference of 8 in accordance with the number of eight line bar housings integrally attached to the rotary shaft 4. Detected member 27b having a convex portion formed at equally divided positions, and two sensors arranged on the same circumference to detect a rotation angle position (index position) and a rotation direction by the passage of the convex portion. 27a,
27a. In FIGS. 7 and 3, reference numeral 50 is a rotational direction positioning member that positions the line bar 2 in the rotational direction in each line bar housing portion, and is formed on the flange portion 2a of the line bar 2 inserted into the line bar receiving portion 5b. The position of the line bar 2 in the rotational direction is determined by engaging the formed key portion (concave groove).

[Structure of Cleaning Device] In this embodiment, the line bar storage magazine 3 cleans the taper shank portions (tool shank) 2b, 2b provided at both ends of the line bar 2 at the line bar transfer position A to remove dust. It has an air blow device 30 for removing. The configuration of the air blow device 30 in this embodiment will be described below with reference to FIG. FIG. 7A is an explanatory view of the configuration of the air blow device,
FIG. 7B illustrates the brush mounting structure.
It is sectional drawing. The two air blowers 30 are provided above and below the same axis of the line bar 2 indexed at the line bar transfer position A, but the basic structure is the same, so only the upper air blower 30 is provided. The description will be omitted for the lower side.

The upper beam member 3c, which is erected on the upper end side of the line bar storage magazine 3, is provided with a bracket 30a that projects to the line bar transfer position A. A linear bearing (not shown) is provided on the bracket 30a, and a slider 32 is provided so as to be movable only in the vertical direction by a pilot bar (not shown) guided by the linear bearing. That is, the rotation of the slider 32 is restricted by the pilot bar described above. An upper pot 31 having a hole having the same shape as the tapered shank portion 2b is rotatably supported on the slider 32 by bearings 32a and 32a. One end of a screw member 33 having a high lead screw is fixed to the upper portion of the upper pot 31 via a cylindrical member 36.
The other end of the screw member 33 is screwed into the nut member 39 fixed to the bracket 30a. Also,
The slider 32 is attached to the piston rod 35 of the upper cylinder 34 attached to the bracket 30a,
The slider 32 moves vertically as the piston rod 35 moves. When the line bar 2 is indexed to the line bar transfer position A while the slider 32 stands by at the rising end, the slider 32 moves to the upper cylinder 34.
It is pushed down by the movement of the piston rod. When the slider 32 is pushed down, the lead of the screw member 33 causes the upper pot 31 fixed to the screw member 33 to rotate and descend. A brush attachment portion 31a is formed on the inner peripheral surface of the upper pot 31, and a brush 37 is attached to the brush attachment portion 31a by a brush pressing member 38. The brush 37 is provided along the inner peripheral surface of the upper pot 31 so as to be parallel to the inclined surface of the tapered shank portion 2b of the line bar 2. The upper taper shank portion 2b is cleaned with a brush 37, and at the same time, cleaning air which is compressed air is supplied from the cleaning air supply port 40 into the upper pot 31. The cleaning air passes through a predetermined gap between the taper shank portion 2b on the upper side of the line bar 2 and the taper hole of the upper pot 31, and blows off dust such as cutting chips cleaned by a brush 37. The taper shank portion 2b on the upper side of the line bar 2 is cleaned. It should be noted that one or more brush cleaning means including the brush mounting portion 31a and the brush 37 may be provided along the inner peripheral surface of the upper pot 31.

Next, the operation of the automatic tool changer 1 having the above structure will be described. The line bar storage magazine 3 indexes the predetermined line bar 2 to the line bar transfer position A with the automatic tool changer 1. When the line bar storage magazine 3 indexes the predetermined line bar 2 at the line bar transfer position A,
The upper cylinder 34 of the air blower 30 is driven to lower the slider 32. With the downward movement of the slider 32,
The upper pot 31 cleans the upper taper shank portion 2b of the line bar 2 by the lead of the screw member 33 fixed to the upper pot 31. At the same time, the cleaning air removes dust attached to the upper taper shank portion 2b. . Also,
At the same time, dust is removed by the same operation for the lower taper shank portion 2b. After this, the upper cylinder 34
Is driven to retract the upper pot 31. Further, the automatic tool changer 1 drives the advancing / retreating drive mechanism to move the tool changer body 11, the arm 12, etc., to the line bar storage magazine 3
To the side, and gripping claws 13a and 13b at the tip of the arm 12
Is engaged with the flange portion 2a and the shaft portion 2c of the line bar 2 positioned at the transfer position A. At this time, the lock pin 21 is lowered by the engagement with the cam 25 to move the lever 18
Since the lock of b is released, the line bar 2 can be easily attached and detached by pulling the line bar 2 outward from the line bar receiving portion 7a against the urging force of the urging means 19. . The grip claws 13a and 13b are the line bar 2
After gripping, the advancing / retreating drive mechanism is driven to grip the gripping claws 13a,
When the line bar 2 held by 13b is moved to the line boring machine side, the line bar 2 is detached from the holding portion 7 of the line bar storage magazine 3.

The line bar 2 is a line bar storage magazine 3
Then, the line bar 2 held by the arm 12 and the gripping claws 13a and 13b in the suspended posture is inverted by the drive of the rotary drive mechanism, and the posture is changed to the vertical posture. After that, the arm 12 is turned counterclockwise (or clockwise) about the turning shaft 11a, and the line bar 2 is moved to the front side of the main shaft (not shown) of the line boring machine. When the line bar 2 moves to the front side of the spindle,
By driving the rotation drive mechanism 12b, the arm 12 and the gripping means 13 are rotated around the axis of the arm 12 to change the posture of the line bar 2 from the vertical posture to the horizontal posture. The axis line of the line bar 2 whose posture has been changed coincides with the axis line of the main shaft positioned at the tool exchange position in the Y-axis direction.

Next, by moving the column of the line boring machine (not shown) in the Z-axis direction, the gripping claws 13a, 1
The line bar 2 gripped by 3b is inserted into the mounting opening of the spindle and clamped by a tool clamp / unclamp mechanism (not shown). After that, the tool changer main body 11 opens the gripping claws 13a and 13b to bring the line bar 2 into a non-grasping state, moves to the spindle-side retracted position D on the side of the line bar storage magazine 3, and moves to the arm 12 and the gripping means 13. Do not interfere with the columns of the line boring machine. The operation of exchanging the line bar is programmed in a control program of a control device (not shown) that controls the operation of the line boring machine, and is automatically or manually executed by a command from the operation panel.

[0025]

Since the present invention is configured as described above, the following effects are produced. The line bar is stored by hanging it in the line bar storage magazine, so even long line bars can be stored stably. In addition, since the line bar storage magazine hangs and stores the line bar, the gripped part of the line bar is located at a relatively high position, making it easy to match the height of the spindle, and exchanging the line bar with the line bar storage magazine. Since the tool changer body can be moved only in the horizontal direction, and therefore the tool changer body need not be moved in the vertical direction, the configuration can be simplified to improve reliability and shorten the tool change time. Can be planned. Further, during the indexing operation of the line bar storage magazine, the gripped part on the upper part of the line bar is locked to the holding part, and the tip of the line bar is supported by the supporting means for preventing vibration, so that the high speed indexing is performed. It is possible to shorten the indexing time of the line bar storage magazine. Since the line bar can be hung and stored, the line bar storage magazine can store a large number of line bars in the minimum space, and the space saving of the automatic tool changer of the line boring machine can be achieved. You can Further, a line boring machine storage magazine and an automatic tool changer are used as a pair of units, and a line bar (tool) can be added to a machining center and a dedicated boring machine (line boring machine) can be made flexible.

[Brief description of drawings]

FIG. 1 is an overall explanatory view of an automatic tool changer for a line boring machine according to the present invention.

FIG. 2 is a side view of a line bar storage magazine according to an embodiment of an automatic tool changer for a line boring machine.

FIG. 3 is an explanatory view of a first rotary plate according to one embodiment of the present invention, and (a) is a view taken along the line II-II in FIG.
(B) is a III-III direction arrow line view of FIG.

FIG. 4 is a view taken along the line IV-IV in FIG.

FIG. 5 is a plan view illustrating the configuration and operation of the lock mechanism.

6 is a view of the lock mechanism of FIG.
(A) is a diagram showing a locked state, and (B) is a diagram showing an unlocked state.

FIG. 7 (a) is an explanatory view of the structure of the air blower (upper side), and FIG. 7 (b) is a view for explaining the brush mounting structure.
It is a VV sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic tool changer 2 Line bar 2a Flange part (holding part) 2b Tapered shank part 2c Shaft part 3 Line bar storage magazine 3b Strut 3c Beam member 4 Rotating shaft 5 1st rotating plate 5a Mounting member 5b Receiving part 6th 2 Rotating plate (supporting means) 6a Supporting member 6b Supporting part 7 Holding part 8 Bed (line boring machine) 9 Cover 10 Base 11 Exchanger body 12 Arm 13 Gripping means 13a, 13b Gripping claw 14 Motor 15 Indexing mechanism 16 times Dynamic drive mechanism 17 Bearing 18 Engagement member 18a Roller 18b Lever 18c Shaft 19 Energizing means 19a Spring 20 Lock mechanism 21 Lock pin 21a Notch 22 Hole (for storing lock pin) 23 Spring (for biasing lock pin) 24 Stopper 25 Cam (lock release means) 26 Handle (for manual lock release) 30 Air Blow Device 30a Bracket 31 Upper Pot 32 Slider 33 Screw Member 34 Upper Cylinder 35 Piston Rod 36 Cylindrical Member 37 Brush 38 Brush Pressing Member 39 Nut Member 40 Cleaning Air Supply Port

Claims (3)

[Claims] 1. A line boring machine that processes a machining hole of a workpiece formed on the same center line with a line boring bar mounted on a spindle, and stores a plurality of the line boring bars so that they can be indexed. In the automatic tool changer of the line boring machine for exchanging the line boring bar between the line boring bar storage magazine and the spindle, a line for holding the line boring bar (2) in a vertically suspended state. Bowling bar storage magazine (3)
And provided in each line bowling bar storage section (3a) of this line bowling bar storage magazine, and engaging with a part of the line boring bar to hold the line boring bar in the line boring bar storage section, A holding part (7) for the line boring bar, which allows the line boring bar to be attached and detached by moving the line boring bar in the horizontal direction, and one or more line boring bar storage parts along the axis of the line boring bar. A support means (6) provided for supporting one end of the line boring bar so as not to swing during indexing rotation of the line boring bar, and provided between the main shaft of the line boring machine and the line boring bar storage magazine. The base (1
0) and the line boring bar transfer position (A) on the line boring bar storage magazine side provided on the base,
Between the retracting position (C) on the magazine side that does not interfere with the line boring bar storage magazine, and between the transfer position (B) of the line boring bar on the spindle side and the retracting position (D) on the spindle side that does not interfere with the line boring machine. A tool changing device main body (11) which moves back and forth between the two, an advance / retreat driving means for moving the tool changing device main body forward and backward on the base, and a tool provided on the tool changing device main body and capable of turning around a vertical axis. An arm (12) and a swivel drive mechanism (16) provided in the tool changer main body for swiveling the arm between a line boring bar transfer position on the spindle side and a line boring bar storage magazine side transfer position. ) And a plurality of gripped parts provided on the tip of the arm and along the axis of the line boring bar are separated by a predetermined amount. And a gripping means (13) for gripping by opening and closing a plurality of gripping claws (13a, 13b) provided in the same manner, and a rotation means for rotating the gripping means provided in the exchange device body around the axis of the arm. Dynamic drive means (12a,
12b), and an automatic tool changer for a line boring bar, which comprises: 2. The line boring bar accommodating magazine includes a base body, a rotary shaft (4) rotatably erected on the base body, and a predetermined line boring bar which is rotated by rotating the rotary shaft. A rotary driving means (14, 15) for indexing to a line boring bar transfer position with the first rotary plate, and a disc-shaped first rotary plate (5) provided on the rotary shaft and rotating together with the rotary shaft; A semicircular arc-shaped line boring bar receiving part (5b), which is provided by equally dividing the circumference of the rotary plate and is open to the outer peripheral side so that the shaft part (2c) on one side of the line boring bar can be inserted and removed. And a plurality of mounting parts for suspending the line boring bar by mounting the flange part (2a) of the line boring bar around the hole of the line boring bar receiving part (5b). 5a), a main body (7b) provided in each of the line boring bar accommodating parts, and a line boring bar receiving part (7a) formed in the main body and concentric with the line boring bar receiving part of the mounting part. ) And an engaging member (18) which is swingably provided at the entrance and exit of the line boring bar receiving portion of the line boring bar receiving portion and which is engageable with and disengageable from the line boring bar inserted into the line boring bar receiving portion.
A holding portion (7) for the line boring bar, which includes an urging means (19) for constantly urging the engaging member in a direction in which the engaging member contacts the line boring bar, and is provided below the first rotating plate. A second rotating plate (6a) having a support portion (6b) that supports the line boring bar by the shaft portion on the other side of the line boring bar and restricts swinging of the line boring bar during indexing rotation.
The automatic tool changer for a line boring machine according to claim 1, further comprising: 3. The holding part (7) is arranged so that the line boring bar does not separate from the line boring bar storage part at a position other than the transfer position (A) of the line boring bar storage magazine side of the line boring bar storage magazine. A lock mechanism (20) for restricting the engagement member (18) from swinging; and a lock mechanism (20) for releasing the lock by the lock mechanism at the transfer position (A) on the side of the line boring bar storage magazine. 3. An automatic tool changer for a line boring machine according to claim 2, further comprising lock releasing means (25) for detachably attaching the bar to the line boring bar storage portion.