JPH0511955Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention is a method for truing (shaping) the grinding wheel of a grinding tool mounted on the turret of a multitasking machine tool while it is mounted on the turret. The present invention relates to a dressing device that can perform dressings (repairing) and dressing (retouching).

(b) Conventional technology Recently, in multi-tasking machine tools, a grinding tool is mounted on the tool post to grind a workpiece, but the grinding wheel of the grinding tool may be deformed or clogged. In some cases, truing and dressing may be necessary. Conventionally, a method has been adopted in which dressing, etc., is performed by performing electrical discharge machining on a grinding wheel that is clogged or otherwise clogged, but in this case, the clogged grinding tool is removed from the tool post and replaced in the electrical discharge machine for dressing. etc.

(c) Problems to be solved by the invention However, this method requires the operator to remove and attach the grinding tool every time dressing, etc. There was an inconvenience that it was difficult to perform this automatically without going through the process.

In addition, in order to solve such problems,
-176764 discloses a machine tool in which a dressing device is fixedly installed next to the work table. However, when the dressing device is fixedly installed in this way, the grinding tool is used for normal machining every time dressing is performed. must be moved from the dressing area to the dressing position where the dressing equipment is provided;
It takes a lot of time to move from the processing area to the dressing position, which has the disadvantage of reducing processing efficiency.

Furthermore, if the dressing device is placed near the work table in order to shorten the travel time between the processing area and the dressing position, the dressing device will get in the way when the workpiece is being processed by the grinding tool, and smooth processing will be hindered. There was an inconvenience.

In order to eliminate the above-mentioned drawbacks, this invention allows the grinding tool mounted on the turret of a multi-tasking machine tool to do so without interfering with normal machining, and also shortens the travel time between the machining area and the dressing position. It is an object of the present invention to provide a dressing device which can perform dressing etc. while being attached to a tool post.

(d) Means for solving the problem That is, the present invention has a machine body 2, and a headstock 7 that rotatably supports a main shaft capable of detachably holding a workpiece 41 on the machine body, and A dressing device main body 12 is provided on the machine body so as to be movable and driveable in a direction parallel to the spindle axis direction, and processing electrodes 16a and 16b are provided on the dressing device main body with their axes parallel to the spindle axis direction. A plurality of grinding tools 47A are rotatably provided on the machine body.
47B, 47C is mounted between the headstock and the dressing device main body, the grinding operation using the grinding tool on the tool rest on the workpiece mounted on the main spindle, and the grinding operation of the dressing device main body. A tool electrode 26 is provided on the main body of the dressing device so as to be freely movable and driven in a direction parallel to the spindle axis direction so that the dressing operation of the grinding tool on the tool rest with respect to the processing electrode can be performed.
is provided so as to be freely rotatable about an axis parallel to the spindle axis so as to be able to come into engagement contact with the grinding tool on the tool rest, and to rotate in the direction of the spindle axis of the grinding tool on the tool rest. so that it can follow the movement,
It is configured to be movable in the axial direction of the main shaft.

Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions in the drawings. The same applies to the column "(e) Effect" below.

(e) Effect With the above-described configuration, the present invention performs grinding processing on the workpiece 41 held by the spindle using the grinding tool on the tool post, and also performs truing/dressing with the grinding tool on the tool post. In some cases,
The dressing device main body 12 is moved toward the headstock to bring the tool electrode 26 into engagement contact with the grinding tool on the tool rest, and in this state, the machining electrodes 16a and 16b act to perform truing/dressing.

(f) Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings.

1 is a rear view of the dressing device shown in FIG. 3; FIG. 2 is a left side view of FIG. 1; FIG. 3 is a front view of a multi-tasking machine tool equipped with an embodiment of the dressing device; Figure 4 is an air circuit diagram of the dressing device, Figures 5 to 13 are diagrams showing how the dressing device is used to dress a grinding tool, and Figures 14 to 17 are the combinations shown in Figure 3. Figures 18 to 21, which show the positional relationship between the grinding tool and the machining electrode mounted on the turret of a processing machine tool, represent the contact states between the grinding tool and the tool electrode shown in Figures 14 to 17, respectively. 22 is a front view showing an example of a grinding tool mounted on the turret of the multitasking machine tool shown in FIG. 3, FIG. 23 is a left side view of FIG. 22, and FIG. 24 is a 22nd 25 is a diagram showing the shank part of the grinding tool shown in FIG. 22, and FIG. 26 is another example of the grinding tool mounted on the tool rest of the multi-tasking machine tool shown in FIG. 3. 27 is a plan view of FIG. 26, and FIG. 28 is a front view of still another example of the grinding tool mounted on the tool rest of the multitasking machine tool shown in FIG. 3.

As shown in FIG. 3, the multi-tasking machine tool 1 has the following features:
It has a body 2, and a bed 3 is provided on the body 2. A carrier 6a constituting a tool rest 6 is supported on the bed 3 in a manner that it can be freely moved and driven along the bed 3 in the directions of arrows A and B (i.e., the Z-axis direction), and supports the tool rest. The stand 6 includes a turret main body 6b in addition to a carrier 6a. That is, the carrier 6a is provided with a turret main body 6b that can be driven to move in directions perpendicular to the directions of arrows A and B (that is, the Z-axis direction) (that is, the directions of arrows C and D in FIG. 2). Further, the tool rest main body 6b shown in FIG. 3 is provided with a tool holding portion 6d. Further, a chain-type tool magazine 6c is provided in the tool rest main body 6b in a form that can selectively supply tools to the tool holding section 6d. In addition,
The tool rest 6 having such a chain-type tool magazine 6c, tool holding portion 6d, etc.
Since it is disclosed in No. 94201 etc., detailed explanation thereof will be omitted here.

A large number of tools 47 are attached to the chain-type tool magazine 6c, and the tools 47 include different types of grinding tools 47A, 47B, and 47C. Below, grinding tools 47A, 47B, 47
C will be explained.

First, the grinding tool 47A has a hollow whetstone holder 49, and the whetstone holder 49 has a main body 50, as shown in FIG. A gripping groove 50b is formed along the outer circumferential surface of the main body 50 in the figure, and a serration groove 50d is formed in the shank portion 50c of the main body 50, as shown in FIG. It is perforated. Further, in the main body 50 shown in FIG. 22, a grindstone holding shaft 51 is rotatable in directions of arrows P and Q about an axis CT3 of the grindstone holding shaft 51 via a plurality of bearings 52. A connecting groove 51a is formed at the right end of the grindstone holding shaft 51 in the figure to engage with a rotating shaft (not shown) provided in the tool holding portion 6d.

Further, the whetstone holding shaft 51 shown in FIG. 22 is provided with a whetstone holding portion 51b that protrudes from the main body 50 to the left in the figure, and a holding surface 51d is formed on the whetstone holding portion 51b. ing. Further, the grindstone holding portion 51b has a female screw 51e, and the grindstone holding shaft 5
Further, a tightening member 53 is connected to the grindstone holding portion 51b by screwing its threaded portion 53a into a female thread 51e. Furthermore, the whetstone holding part 51b includes
A disc-shaped grindstone 55 is attached to the tightening member 53.
and a holding surface 51d, and is detachably attached to the boss 55a of the grinding wheel 55, and an electrode connecting groove 55b is formed along the outer peripheral surface of the boss 55a.

Further, the grinding tool 47B has a grindstone holder 56, as shown in FIG.
6 has an L-shaped main body 57. A grip groove 57b is formed along the outer circumferential surface of the main body 57 in the figure, and a serration groove 57d is formed in the shank portion 57c of the main body 57, as shown in FIG. It is perforated. Furthermore, an electrode connecting member 57d is fixed to the main body 57 shown in FIG. A through hole is drilled along CT5.

Further, within the main body 57 shown in FIG. 26, a connecting shaft 59 is provided via bearings 61a, 61b, etc.
Arrows R, centering on the axis CT4 of the connecting shaft 59,
The connecting shaft 59 is fitted and supported so as to be rotatable in the S direction, and the right end of the connecting shaft 59 in the figure has a connecting groove 59 that can engage with a rotating shaft (not shown) provided in the tool holder 6d.
A is formed by drilling. Note that a bevel gear 59b is attached to the left end portion of the connecting shaft 59 in FIG.

Furthermore, within the main body 57, a grindstone holding shaft 60 is mounted via bearings 61c, 61c.
The shaft center CT5 of the connecting shaft 59 is perpendicular to the shaft center CT4 of the connecting shaft 59, and is fitted and supported in such a manner that it can rotate freely in the directions of arrows T and U about the shaft center CT5, and the upper end of the grindstone holding shaft 60 in the figure A bevel gear 60a is attached to the portion via a key 60b. Note that the bevel gear 60a meshes with the bevel gear 59b described above so as to be rotatable in the directions of arrows T and U. Further, a whetstone holding part 60c is provided at the lower end of the whetstone holding shaft 60 in FIG.
A holding surface 60d is formed. Further, a female screw 60e is screwed in the whetstone holding part 60c in the direction of the axis CT5 of the whetstone holding shaft 60, and a tightening member 62 is further screwed in the whetstone holding part 60c, and a tightening member 62 is screwed in the direction of the axis CT5 of the whetstone holding shaft 60.
2a is screwed into the female thread 60e to connect. Furthermore, a grindstone 55 formed in an annular shape is attached to the grindstone holding portion 60c so as to be sandwiched between the tightening member 62 and the holding surface 60d.

Further, the grinding tool 47C has a hollow whetstone holder 63, as shown in FIG. 28, and the whetstone holder 63 has a main body 65. A gripping groove 65b is formed along the outer circumferential surface of the main body 65 in the figure, and a serration groove (not shown) is formed in the shank portion 65c of the main body 65. There is. Furthermore, within the main body 65 shown in FIG.
It is fitted in such a way that it can rotate freely in the directions of arrows V and W around CT6, and the right end of the connecting shaft 67 in the figure is
A connecting groove 67a is formed.

Further, inside the main body 65, a grindstone holding shaft 69 is connected to the holding shaft 69 via bearings 66b, 66b.
The shaft center CT7 of the connecting shaft 67 is inclined by a predetermined angle θ with respect to the shaft center CT6 of the connecting shaft 67, and the shaft center CT7 is fitted and supported so as to be freely rotatable in the directions of arrows E and F. 69 is connected to the aforementioned connecting shaft 67 via a flexible joint 70. Further, the whetstone holding shaft 69 has a whetstone holding portion 69b attached to the main body 65.
The whetstone holding portion 69b is provided with a holding surface 69d, which protrudes further to the left in FIG. Further, a female screw 69e is screwed in the whetstone holding portion 69b in the direction of the axis CT7 of the whetstone holding shaft 69, and a tightening member 71 is further provided in the whetstone holding portion 69b to connect the threaded portion 71a to the female screw 69.
It is connected by screwing it into e. Further, a disk-shaped grindstone 55 is mounted on the grindstone holding portion 69b shown in FIG. 28 in a manner that it is sandwiched between the tightening member 71 and the holding surface 69d, and a boss 55c of the grindstone 55 is attached to the grindstone 55. is the electrode connection groove 55
b is bored and formed along the outer circumferential surface of the boss 55c in the figure.

Further, a headstock 7 is provided on the left side of the machine body 2 in FIG. 3, and a chuck 9 is mounted on the headstock 7 so as to be rotatably driven via a main shaft (not shown). Note that the chuck 9 holds a workpiece 41 in a detachable manner.

By the way, the body 2 shown in FIG. 3 is provided with a dressing device 10 according to the present invention, and the dressing device 10 has a base 11, a main body 12, a drive cylinder 37, etc. as shown in FIG. ing. That is, a base 11 is provided on the machine body 2 in a form extending in the directions of arrows A and B (i.e., the Z-axis direction) parallel to the direction of the spindle axis.
1, the main body 12 has guide rails 11a, 11
It is provided so as to be movable along the base 11 in the directions of arrows A and B (that is, in the Z-axis direction) via a. As shown in FIG. 1, the main body 12 is provided with a processing electrode section 13.
has a support shaft 15, processing electrodes 16a, 16b, a drive motor 21, and the like.

That is, the main body 12 shown in FIG.
is rotatably provided with its axis parallel to the directions of arrows A and B (i.e., the Z-axis direction) and in the directions of arrows I and J, via a plurality of bearings, etc.,
The support shaft 15 has an electrode support portion 15a that is attached to the main body 12.
It is formed to protrude further in the direction of arrow A.
A power receiving ring 15c formed in an annular shape is fixed to the right end of the electrode support part 15a in the drawing, and a machining electrode 16a made of copper for finishing truing and dressing is further attached to the electrode support part 15a.
16a and processing electrodes 16b, 16b for rough truing and dressing made of graphite are pressed against the power receiving ring 15c by a clamp member 15b. Note that an electrode 17 is slidably connected to the power receiving ring 15c, and the electrode 17 is connected to a discharge unit (not shown) via a power supply cable 19.

Furthermore, a pulley 20a is attached to the right end of the support shaft 15 in FIG. It is set in the form. A drive shaft 21a is rotatably supported by the drive motor 21, and a pulley 20b is attached to the drive shaft 21a. In addition, the pulley 20b and the pulley 20a attached to the support shaft 15
An endless belt 22 is stretched between them.

Further, the main body 12 shown in FIG. 1 is provided with a tool power supply mechanism 23, and the tool power supply mechanism 23 is
Support tube 23a, pivot shaft 25, pivot cylinder 27
and a positioning cylinder 33. That is, the main body 12 includes a support cylinder 2 formed in a hollow shape.
3a is connected to the arrow K through a plurality of bearings, etc.
It is provided to be rotatable only in the L direction, and as shown in FIG. 2, an engaging member 23b is implanted on the outer circumferential surface of the support tube 23a. In addition, the support tube 23a
, the pivot shaft 25 is rotated in the directions of arrows A and B (i.e., the Z-axis direction) via a sliding means (not shown) such as a key.
The tool electrode 26 is fitted and supported in a movable manner only in the left end 25a of the pivot shaft 25 in the figure.
is attached via a boss 26a that constitutes the electrode 26. As shown in FIG. 2, the boss 26a is provided with an electrode rod 26b formed in a U-shape so as to be able to engage and come into contact with the aforementioned grinding tool 47A and the like.

Furthermore, a rotating cylinder 27 is provided below the support cylinder 23a of the main body 12 in FIG. It is supported so that it can protrude and retract freely in the direction. In addition, the turning cylinder 27
As shown in FIG. 4, the tubes 27b, 27
It is connected to a solenoid valve 29 via c, and the solenoid valve 29 is connected to compressed air supply means (not shown).

Further, a spring 30 is stretched between the pedestal 28 and the support cylinder 23a via support blocks 31a and 31b, and the spring 30 allows the support cylinder 23a (therefore, the pivot shaft 25) to always rotate. It is biased in the direction of arrow L. A pivot shaft end confirmation sensor 32 is provided in a portion of the main body 12 that is a predetermined distance away from the right end 25c of the pivot shaft 25 to the right in FIG.

Further, in the main body 12 shown in FIG. 1, a positioning cylinder 33 constituting the tool power feeding mechanism 23 is provided at a predetermined distance below the rotation axis 25 in the figure. 33a is in the direction of arrows A and B (i.e., Z-axis direction)
It is supported so that it can protrude and retract freely. Rod 33a
In the figure, there is a pressing plate 3 formed in the shape of a disk at the tip end.
3b is provided in a form that can press the tool electrode 26 mentioned above in the direction of arrow A, and the positioning cylinder 33 is further provided with a tube 3b as shown in FIG.
A solenoid valve 35 is connected via 3c and 33d. Solenoid valve 35 is connected via tube 45 to a compressed air supply (not shown).

On the other hand, a dressing device 10 is located between the guide rails 11a and 11a on the base 11 shown in FIG.
A cylinder 37 is provided, and a rod 37a is supported by the cylinder 37 in such a manner that it can protrude and retract in the directions of arrows A and B (ie, the Z-axis direction). The tip of the rod 37a in FIG. 1 is connected to the lower end of the main body 12 in the figure via a connecting member 37d, and the cylinder 37 is connected to a solenoid valve via tubes 37b and 37c as shown in FIG. 39 is connected, and the solenoid valve 39 is connected via a tube 45 to a compressed air supply source (not shown).

Since the multi-tasking machine tool 1 has the above configuration, in order to grind the workpiece 41 using the multi-tasking machine tool 1, the workpiece 41 to be machined must be
is attached to the headstock 7 shown in FIG. 3 via a chuck 9. Next, the chain-type tool magazine 6c of the tool rest 6 is rotated as appropriate, and the grinding tool 47A used for machining among the plurality of tools 47 mounted on the magazine 6c is placed in the tool rest main body 6b. It is supplied to the tool holding section 6d.

Next, the grinding wheel 5 of the grinding tool 47A shown in FIG.
By rotating the workpiece 5 and rotating the main shaft (not shown), the workpiece 4 is rotated through the chuck 9.
Rotate 1. In that state, the tool rest main body 6b
along with the grinding tool 47A along the carrier 6a in the direction of arrow D in FIG.
The workpiece 41 is ground by the grindstone 55 of the grinding tool 47A by moving the workpiece 41 in the appropriate direction. Also, instead of the grinding tool 47A, a grinding tool 47 attached to the chain type tool magazine 6c
B and 47C are respectively supplied to the tool holding portion 6d of the tool rest main body 6b, and the grinding tools 47B and 47C are
It is also possible to perform a predetermined grinding process on the workpiece 41 by using the grinding method.

In addition, at this time, the main body 1 of the dressing device 10
2 is positioned by the drive cylinder 37 at the standby position on the side in the direction of arrow A, that is, on the opposite side of the workpiece 41 to be ground by the grinding tools 47A, 47B, and 47C.
Grinding of the workpiece 41 by A, 47B, and 47C is carried out smoothly without the main body 12 getting in the way.

As this grinding process continues, the grindstones 55 of the grinding tools 47A, 47B, and 47C become deformed or clogged, but if the clogging becomes severe, it is necessary to , it is necessary to truing and dressing these grinding tools 47A, 47B, and 47C. Therefore, below, the grinding tools 47A, 47B, 47C are
While the tool is still attached to the tool holder 6d, the first
A case will be described in which dressing etc. are performed using the dressing device 10 shown in the figure.

First, the solenoid valve 35 shown in FIG. 4 is switched to drive the positioning cylinder 33 shown in FIG. 1, and the rod 33a is projected in the direction of arrow A together with the pressing plate 33b. Then, the pressing plate 33b comes into contact with the boss 26a of the tool electrode 26, and the tool electrode 26 is further pressed by the pressing plate 33b, and while pulling out the pivot shaft 25 from the support cylinder 23a in the direction of arrow A, the tool electrode 26 is moved in the direction of arrow A. The robot moves a predetermined distance and is positioned at a predetermined standby position. Next, in that state, the fourth
By appropriately switching the solenoid valve 39 shown in the figure, the cylinder 37 shown in FIG. 1 is driven to move the rod 37a in the direction of arrow B. Then, the main body 12 constituting the dressing device 10 is pushed by the rod 37a via the connecting member 37d, and moves from the standby position shown in FIG. It moves to the vicinity of the tool rest 6 on the side and is positioned at the dressing position shown in FIG.

In this state, by driving the drive motor 21 shown in FIG. 1 and rotating the drive shaft 21a together with the pulley 20b, the support shaft 15 is
6a, 16a, 16b, 16b, belt 2
2 and pulley 20a in the direction of arrow I or J. Further, by appropriately rotating the Chiehan type tool magazine 6c of the tool rest 6 shown in FIG. 3, a turning tool 47 such as a cutting tool mounted on the magazine 6c is supplied to the tool holder 6d.

Furthermore, in this state, the tool rest main body 6b is fed along the carrier 6a along the carrier 6a by a predetermined distance in the direction of arrow D in FIG. It is driven to move appropriately in the directions of arrows A and B. Then,
With this tool, the processing electrodes 16a, 16a, 16b, 16b of the dressing device 10 shown in FIG.
As shown in the figure, the outer peripheral surface is cut into a cylindrical shape. Note that the processing electrodes 16a, 16a, 16b,
When the molding of 16b is completed, the tool rest 6 is
By moving the tool 47 together with the tool 47 by a predetermined distance in the direction of arrow C, it is evacuated from the dressing device 10.

In this way, each processing electrode 16a, 1 shown in FIG.
6b has been molded, a work is performed to connect the tool electrode 26 constituting the tool power supply mechanism 23 to the grinding tool 47A to be dressed. To do this, first, install the solenoid valve 29 shown in FIG.
By switching, the rod 27a of the turning cylinder 27 is caused to protrude in the direction of arrow G in FIG. Then, the rod 27a comes into contact with the engagement member 23b implanted in the support cylinder 23a, and further moves a predetermined distance in the direction of arrow G in this state. Then, the support cylinder 23a is connected to the rod 27a via the engagement member 23b.
, and rotates along with the pivot shaft 25 by a predetermined angle in the direction of arrow K against the elasticity of the spring 30. Therefore, the tool electrode 26 attached to the rotation shaft 25 is also rotated from the standby position Y1 in the direction of arrow K by a predetermined angle about an axis parallel to the spindle axis, and is positioned at the connection preparation position Y2. (See Figure 8).

On the other hand, by appropriately rotating the chain-type tool magazine 6c of the retracted tool rest 6,
The grinding tool 47A to be dressed is supplied to the tool holder 6d. Furthermore, in that state, the tool rest 6
By appropriately moving and driving the grinding tool 47A together with the grinding tool 47A in the directions of arrows A and B and further in the directions of arrows C and D, the grinding tool 47A is moved to a predetermined electrode connection position C.
1 (see Figure 9).

Next, in this state, by switching the solenoid valve 29 shown in FIG. 4, the rod 27a of the swing cylinder 27 is moved back in the direction of arrow H in FIG. Then, the engaging member 23b engages the rod 27
By releasing the restriction on movement in the direction of arrow L by a, the elasticity of the spring 30 causes the support tube 2 to move in the direction of the arrow L.
3a, it rotates by a predetermined angle in the direction of arrow L. Therefore, the pivot shaft 25 fitted and supported by the support tube 23a also pivots by a predetermined angle in the direction of the arrow L together with the tool electrode 26, and the electrode rod of the tool electrode 26
6b slidably contacts the grinding tool 47A shown in FIG. 9 via its electrode connection groove 55b.

In this way, when the tool electrode 26 is connected to the grinding tool 47A, by driving the solenoid valve 35 shown in FIG. move back in the direction. Then, the pressing plate 33b presses the boss 26a of the tool electrode 26.
It is positioned at a position a predetermined distance away from in the direction of arrow B.

Next, the tool rest 6 shown in FIG.
By moving the grindstone 55 of the grinding tool 47A by a predetermined distance in the direction of the arrow B together with A, the grindstone 55 of the grinding tool 47A is
As shown in Figure 0, it is positioned at a position facing the rough machining electrode 16b. Then, the tool electrode 26
The rotating shaft 25 is pushed into the main body 12 and moved a predetermined distance in the direction of arrow B, following the grinding tool 47A via the electrode rod 26b fitted into the electrode connection groove 55b of the grinding tool 47A. In addition,
At this time, the electrode connecting groove 55b is formed perpendicularly to the directions of arrows A and B (i.e., the Z-axis direction),
Moreover, since the tool electrode 26 is always urged in the direction of arrow L by the spring 30, the grinding tool 26
During movement in the direction of arrow B 7A, the tool electrode 26 will not come off from the electrode connection groove 55b.

In this state, by driving the drive motor 21 shown in FIG. 1 and rotating the drive shaft 21a together with the pulley 20b, the support shaft 15 is
6a, 16a, 16b, 16b, belt 2
2 and pulley 20a in the direction of arrow I or J. In addition, the grinding wheel 5 of the grinding tool 47A
5 is rotated with a predetermined distance away from the processing electrode 16b. Furthermore, by driving a discharge unit (not shown) in this state, power is supplied between the grinding tool 47A and the machining electrode 16b via the power supply cables 26d, 19, etc. Then, grinding tool 4
A high voltage is applied between the 7A grindstone 55 and the machining electrode 16b, causing a discharge, and the current flows through the discharge unit, the power supply cable 26d, the tool electrode 26, the electrode connection groove 55b, the whetstone 55, the machining electrode 16b, and the power receiving It flows through a discharge circuit formed by the ring 15c, the electrode 17, and the power supply cable 19. For this reason,
The grindstone 55 has its outer circumferential surface as shown in the figure subjected to electric discharge machining,
Roughly trued. At this time, the electrode rod 26b of the tool electrode 26 is in contact with the electrode connecting groove 55b of the grinding tool 47A with a predetermined pressure due to the elasticity of the spring 30 (see FIG. The electrode rod 26b does not separate from the electrode connection groove 55b, and rough truing is performed smoothly.

After the grinding wheel 55A of the grinding tool 47A has been roughly trued in this way, the tool rest 6 shown in FIG. It is made to face the processing electrode 16a for finishing truing and dressing. Then, the tool electrode 26 also connects to the grinding tool 47 via the electrode rod 26b fitted into the electrode connecting groove 55b of the grinding tool 47A.
The pivot shaft 25 is moved a predetermined distance in the direction of arrow A while being pulled out from the main body 12 in a manner that follows arrow A. At this time, since the electrode connecting groove 55b is formed perpendicularly to the directions of arrows A and B (i.e., the Z-axis direction), which are the moving directions of the grinding tool 47A, There is no possibility that the tool electrode 26 will come off the electrode connection groove 55b during the movement of the tool electrode 26.

Next, by driving the discharge unit in this state, via the power supply cables 26d, 19, etc.
A high voltage is applied between the grinding wheel 55 of the grinding tool 47A and the machining electrode 16a to generate electric discharge, thereby performing finishing truing and dressing of the grinding wheel 55. At this time, as described above, the electrode rod 26b of the tool electrode 26 is securely connected to the grinding wheel 55 via the electrode connecting groove 55b of the grinding tool 47A, so that during machining, the electric discharge unit and the power supply cable 26d, tool electrode 26, electrode connection groove 55
b. The discharge circuit formed by the grindstone 55, processing electrodes 16a, 16b, power receiving ring 15c, electrode 17, and power supply cable 19 is not interrupted, and finishing truing and dressing are performed smoothly.

In addition, when performing such truing and dressing, depending on the diameter of the grinding wheel 55 of the grinding tool 47A, the axis of the processing electrodes 16a, 16b (therefore, the support shaft 15 ) and the axis of the grindstone 55
1 is different because it is necessary to maintain a constant distance between the outer circumferential surfaces of the processing electrodes 16a and 16b in the drawing and the outer circumferential surface of the grindstone 55 that performs dressing/truing. However, since the electrode rod 26b of the tool electrode 26 is elongated, the 21st
If the diameter of the grindstone 55 is large as shown in the figure,
The tip of the electrode rod 26 in the figure fits into the electrode connection groove 55b of the grindstone 55. Further, as shown in FIG. 20, when the diameter of the grindstone 55 is small, the root portion of the electrode rod 26b fits into the electrode connection groove 55b.
Furthermore, when the diameter of the grindstone 55 is medium, the center portion of the electrode rod 26b fits into the electrode connection groove 55b, and in any of the above cases, the tool electrode 26 is connected to the grindstone 55 through the electrode connection groove 55b. Truing and dressing can be performed without any trouble by connecting to the

Further, when the grinding tool 47B shown in FIG. 26 is mounted on the tool rest 6 of the multitasking machine tool 1, the axis of the grinding wheel 55 is perpendicular to the directions of arrows A and B (Z-axis direction). When truing and dressing a grinding tool, as shown in FIG. 14, the axes of the processing electrodes 16a and 16b (and therefore the axis of the support shaft 15) and the axis CT5 of the grindstone 55 are perpendicular to each other. In this case, the electrode rod 26 of the tool electrode 26
As shown in FIG. 18, b is connected to the electrode of the grindstone 55 by fitting the tip end thereof into the electrode connecting groove 55b of the electrode connecting member 57d formed perpendicularly to the Z-axis direction. It comes into contact with the contact portion 57g. For this reason, the tool electrode 26 is connected to the electrode contact portion 57.
By connecting to the grindstone 55 via g, truing and dressing can be performed without any trouble.

Furthermore, a grinding tool 4 for thread grinding shown in FIG.
When truing and dressing 7C, the electrode rod 26b of the tool electrode 26 is
By fitting the tool electrode 26 into the electrode connection groove 55b of the grindstone 55 shown in the figure, the tool electrode 26 is inserted into the electrode connection groove 55b of the grindstone 55.
By connecting it to the grindstone 55 via the grinding wheel, truing and dressing can be performed without any trouble.

After the grinding tool 47A and the like have been trued and dressed in this way, the solenoid valve 29 shown in FIG. 23b is rotated along with the support tube 23a by a predetermined angle in the direction of arrow K while resisting the elasticity of the spring 30. Then, the turning shaft 25 also turns by a predetermined angle in the direction of arrow K together with the tool electrode 26, the engagement state between the electrode 26 and each electrode connection groove 55b is released, and the electrode 26 returns to the connection preparation position Y2.

In this state, by switching the solenoid valve 35, the rod 3 of the positioning cylinder 33 is
3a is made to protrude in the direction of arrow A together with the pressing plate 33b, as shown in FIG. Then, the rotation axis 25
moves the tool electrode 26 in the direction of arrow A while being pushed by the pressing plate 33b, and is positioned at a predetermined standby position.

When the pivot shaft 25 moves in the direction of arrow A,
By driving the solenoid valve 29, the rod 27a of the turning cylinder 27 is moved in the direction indicated by the arrow H in FIG.
direction, and the engagement member 23b, and thus the support cylinder 23a, are rotated by a predetermined angle in the direction of arrow L by the elasticity of the spring 30. Then, the rotation axis 25
As shown in FIG. 12, the tool electrode 26 rotates by a predetermined angle in the direction of arrow L, and returns from the connection preparation position Y2 to the standby position Y1.

Furthermore, in this state, the cylinder 37 shown in FIG. 1 is driven to move the rod 37a back by a predetermined distance in the direction of arrow A. Then, the dressing device 10
The main body 12 constituting the main body 12 is moved in the direction of the arrow A from the dressing position near the tool rest 6 on the head stock 7 side shown in FIGS. 6 to 12 while being pulled through the connecting member 37d. It is positioned at the standby position shown in FIGS. 5 and 13.

In the above-described embodiment, the dressing device 10 is connected to the processing electrode 1 as shown in FIG.
Although the case has been described in which the dressing device 10 is installed on the machine body 2 of the machine tool 1 so that the dressing device 6a, 16b, the tool electrode 26, etc. are located on the right side of the main body 12 in the figure, the method of installing the dressing device 10 is not limited to this. It may be installed in the machine tool 1 in any way as long as the tool electrode 26 can be moved in the directions of arrows A and B, which is the truing/dressing method, and the machining electrodes 16a and 16b can be attached along the same direction. . For example, the dressing device 10 may be
a, 16b, the tool electrode 26, etc., in the direction opposite to the position shown by the solid line in FIG.
6a, 16b, etc. may be installed on the body 2 of the machine tool 1 so that the parts 6a, 16b, etc. are located on the left side of the body 12 in the figure.

(g) Effect of the invention As explained above, according to the invention, the headstock 7 has a machine body and rotatably supports a main shaft that can detachably hold the workpiece 41 on the machine body 2.
A dressing device main body 12 is provided on the machine body so as to be movable and driveable in a direction parallel to the spindle axis direction, and a processing electrode 16 is provided on the dressing device main body.
a, 16b are rotatably provided with their axes parallel to the direction of the main shaft axis, and on the machine body,
A turret on which a plurality of grinding tools 47A, 47B, and 47C can be attached is used between the headstock and the dressing device main body to perform a grinding operation using the grinding tools on the turret on a workpiece attached to the spindle. and a tool electrode provided on the dressing device main body so as to be movable and driveable relative to the direction parallel to the spindle axis direction so that the dressing operation of the grinding tool on the tool rest with respect to the processing electrode of the dressing device main body can be performed. 26 is provided so as to be rotatably driven around an axis parallel to the main shaft axis so as to be able to engage and come into contact with the grinding tool on the tool rest, and
In order to follow the movement of the grinding tool on the tool rest in the direction of the spindle axis, it is configured to be movable in the direction of the spindle axis. When performing grinding using a grinding tool, the main body of the dressing device is moved away from the main axis and processing can be carried out in that state, so that the main body of the dressing device does not get in the way during processing. Therefore, the workpiece held by the spindle can be smoothly ground. Furthermore, when truing/dressing the grinding tool on the tool post, the dressing device main body is moved to the headstock side, the tool electrode is brought into engagement contact with the grinding tool on the tool post, and in this state, the machining electrode is During truing/dressing, the dressing device can be positioned near the turret on the headstock side, unlike when the dressing device is fixedly installed. It is no longer necessary to move the turret along with the grinding tool to a position far away from the workpiece processing area where the dressing device is installed, and the travel time between the workpiece processing area and the dressing position is greatly reduced. It can be shortened and contribute to improved processing efficiency.

[Brief explanation of drawings]

1 is a rear view of the dressing device shown in FIG. 3, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a front view of a multitasking machine tool equipped with an embodiment of the dressing device. FIG. 4 is an air circuit diagram of the dressing device, FIGS. 5 to 13 are diagrams showing how the dressing device is used to dress a grinding tool, and FIGS. 14 to 17 are the combinations shown in FIG. 3. Figures 18 to 21, which are diagrams showing the positional relationship between the grinding tool mounted on the tool rest of the processing machine tool and the machining electrode, represent the contact states between the grinding tool and the tool electrode shown in Figures 14 to 17, respectively. Figure shown, second
Figure 2 is a front view showing an example of a grinding tool mounted on the turret of the multitasking machine tool shown in Figure 3;
The figure is a left side view of Fig. 22, Fig. 24 is a right side view of Fig. 22, Fig. 25 is a view showing the shank part of the grinding tool of Fig. 22, and Fig. 26 is the compound machining shown in Fig. 3. A front view showing another example of a grinding tool mounted on a tool rest of a machine tool, FIG. 27 is a plan view of FIG. 26,
FIG. 28 is a front view showing still another example of the grinding tool mounted on the tool rest of the multitasking machine tool shown in FIG. 3. 1... Multi-tasking machine tool, 2... Machine body, 6...
Turret, 10...Dressing device, 16a, 1
6b... Processing electrode, 26... Tool electrode, 47A,
47B, 47C...Grinding tools.

Claims (1)

[Claims for Utility Model Registration] The machine has a machine body, and the machine body is provided with a headstock that rotatably supports a main shaft that can detachably hold a workpiece, and the main body of the dressing device is mounted on the machine body in the direction of the axis of the main shaft. A machining electrode is provided on the dressing device main body so as to be freely movable and driveable in a parallel direction, and a machining electrode is provided on the main body of the dressing device so as to be rotatably driveable with its axis parallel to the main axis direction, and a plurality of grinding tools are mounted on the main body. A grinding operation using a grinding tool on the tool rest is provided between the headstock and the dressing device main body, and a grinding operation using the grinding tool on the tool rest is performed on the workpiece mounted on the main spindle, and the cutting tool is operated on the machining electrode of the dressing device main body. The dressing device is provided so as to be able to move freely in a direction parallel to the spindle axis so that the dressing operation of the grinding tool on the table can be carried out, and a tool electrode is connected to the dressing tool body on the dressing device body and connected to the grinding tool on the tool rest. The main spindle is provided so as to be freely rotatable about an axis parallel to the spindle axis so as to be able to come into contact with each other, and to be able to freely rotate around an axis parallel to the spindle axis, and to follow the movement of the grinding tool on the tool rest in the spindle axis direction. A machine tool with a dressing function configured to be movable in the center direction.