JPH0144410B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a punch press, and more specifically, to a punch press such as a turret punch press, a novel punch press that automatically positions a punch and a die by NC control. It is related to.

Conventionally, for example, when the molds (punch and die) used in a turret punch press have a directional shape, even if the shapes are the same,
Due to the difference in directionality, it was not possible to use the same mold, and it was necessary to prepare separate molds with different directionality.

In such cases, a method has been used in which the mold in the mold holder is rotated in a desired direction using a special jig and then fixed with fixing means such as bolts.

However, this method requires a lot of effort and time, and it is difficult to accurately determine the rotation angle.

In addition to the above-mentioned method, key grooves were provided in the guide of the mold at intervals of 45 degrees or 90 degrees, and the mold was reset as necessary.

In the case of this method, the accuracy of the rotation angle is good, but there are drawbacks such as high manufacturing cost of the guide and limitations on the rotation angle.

In order to solve the above conventional problems, a technology was developed in which upper and lower mold holders were rotatably provided, as shown in Japanese Patent Application Laid-Open No. 51-138983 (hereinafter simply referred to as the prior art). has been done. However, in the prior art, the upper and lower mold holders are one
Since the system is connected as one system, there are problems such as difficulty in supporting the upper and lower mold holders, for example, when the upper and lower turrets are completely separated into upper and lower parts.

This invention was made in view of the conventional problems as described above.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

Figure 1 shows a turret punch press 1 equipped with an NC device in which the present invention is implemented, as an example of a punch press.
The turret punch press 1 is made up of a C-shaped frame 5 with a pocket 3, and includes a fixed table 7 that supports a plate-shaped workpiece W (workpiece W), and a A workpiece positioning device 9 for positioning the object W, and a turret device 19 including a disk-shaped upper turret 13 with a punch 11 and a disk-shaped lower turret 17 with a die 15 are provided.

Further, a ram main body 23 equipped with a striker 21 for striking the punch 1 of the upper turret 13 is mounted on the frame 5 so as to be able to rise and fall freely, and a tapping unit 25 is mounted on the turret device 19 so as to be freely attachable and detachable. It is installed on.

The fixed table 7 is provided on a lower frame 29 located below the bosom portion 3 of the C-shaped frame 5, and the workpiece positioning device 9 is
A movable table 3 supported so as to be movable in the left and right direction via a rail 31 installed on the lower frame 29
3, a carriage 37 supported so as to be movable in the front and back direction via a rail 35 built on the movable table 33, and a clamp 39 provided on the carriage 37 for clamping the workpiece W. The workpiece W can be positioned in the front, rear, left and right directions with respect to the turret device 19.

The turret device 19 includes an upper frame 41 located above the pocket portion 3 as described above.
A disc-shaped upper turret 13 is rotatably supported via a rotating shaft 43, and a disc-shaped lower part is rotatably supported via a rotating shaft 45 by a lower frame 29 located below the pocket portion 3. Turret 1
7, and the upper turret 13 and lower turret 17 are connected to rotational drive devices 47a and 47, which will be described later.
7b (servo motor, etc.) to rotate in the same direction in synchronization. A plurality of punches 11 are supported near the outer periphery of the upper turret 13, and a plurality of dies 15 corresponding to the plurality of punches 11 are supported on the lower turret 17.

The ram main body 23 is vertically supported by the upper frame 41 and is located above the circular locus drawn by the plurality of punches 11 supported by the upper turret 13. A striking element 21 for striking the punch 11 is attached.

Next, the upper turret 13 and the lower turret 17 are provided with a rotary drive device 4 as shown in FIG.
The rotational driving force of 7a and 47b is transmitted to the punch 11 and the die 15, and the punch 11 and the die 15
a transmission mechanism 49a for directional positioning with the
49b is provided.

The transmission mechanism 49a of the upper turret 13 includes a drive gear 51 of a rotational drive device 47a such as a pulse motor or a servo motor attached to the upper frame 41, a transmission gear 53 that meshes with the drive gear 51, and a transmission gear 53. rotation support shaft 5
5, a second pulley 61 and a third pulley 63 as rotating bodies provided in a clutch mechanism 59, which will be described later, and a rotation support shaft implanted on the upper turret 13. A fourth pulley 65 and a fifth pulley 67 are rotatably attached to the punch holder 64, a sixth pulley 71 is fitted to the punch holder 69, and as shown in FIG. The first endless belt 73a and the second endless belt 73 are wound around the pulley 71, respectively.
b, and a third endless belt 73c.

The rotation support shaft 55 including the gear 53 and the first pulley 57 is attached to the upper frame 41,
The transmission gear 53 and the first pulley 57 are rotatably supported via a bearing 79 and a sleeve 81 fitted into the rotation support shaft 55.

Further, the clutch mechanism 59 including the second pulley 61 and the third pulley 63 includes a fluid pressure cylinder 83 mounted on the upper frame 41, and a slidable piston 87 that partitions the inside of the cylinder 85 of the fluid pressure cylinder 83. A piston rod 91 and a plurality of shot pins 93 are provided so as to be freely retractable through a return spring 89 and the like.

The arrangement of the shot pins 93 is 110°, 120°,
Since the pitch is unequal at 130°, they do not match except for the 360° phase shift. This piston rod 91
The above-mentioned second pulley 61 is connected to the tip of the shot pin 93 via a bearing 95, a sleeve 97, etc.
A first endless belt 73a is rotatably fitted into the second pulley 61 and the first pulley 57.
is being passed around.

Further, below the second pulley 61, a pulley support 99 for supporting the third pulley 63 is installed on the upper turret 13. 3rd pulley 6
3 is formed with a plurality of engagement holes 101 that engage with the plurality of shot pins 93, and the tip of the shot pin 93 engages with the engagement holes 101 as the piston 87 extends. At this time, the rotational driving force of the rotational drive device 47a is applied to the third pulley 63.
transmitted to. Therefore, the fluid pressure cylinder 83
The telescopic operation has a kind of clutch function that transmits and disconnects the rotational driving force to the third pulley 63.

An annular body 105 is provided between the pulley support body 99 and the third pulley 63 via an insulator 103, and a friction plate 75a is further provided between the annular body 105 and the third pulley. A brake device 77 consisting of a disc spring 75b and a disc spring 75b is provided, and an index detection device 107 for the upper turret 13 is provided on one side of the pulley support 99.

This indexing detection device 107 is connected to the upper turret 1.
3, and a movable side detector 111 attached to the side wall of the rotating shaft 43. The upper turret 13 is indexed by these detectors 109 and 111. It is something to do.

Furthermore, a clutch confirmation mechanism is incorporated inside the annular body 105 to confirm whether the clutch is engaged or not.

This clutch confirmation mechanism is based on the annular body 105.
, the friction plate 75a, the disc spring 75b, and the push rod 93 that comes into contact with the tip of the shot pin 93.
b, and an insulator 103 interposed between the pulley support 99 and the annular body 105, and a weak current is constantly applied to the annular body 105 from an energizing device (not shown).

Therefore, the shot pin 93 engages with the engagement hole 101 of the third pulley 63, and the push rod 93b
When the friction plate 75a is pushed down through the annular body 105, the friction plate 75a is separated from the annular body 105, and as a result, the weak current flowing between the pulley support 99 and the annular body 105 is cut off. You can confirm that the clutch is engaged.

Conversely, when the shot pin 93 comes out of the engagement hole 101 and the so-called clutch is disengaged, the friction plate 75a is pushed up by the elastic force of the disc spring 75b, and the friction plate 75a comes into contact with the annular body 105, generating a weak current. As a result, it can be confirmed that the clutch is disengaged.

Next, a rotation support shaft 6 is mounted on the upper turret 13.
4, the fourth pulley 65 is attached via the fifth pulley 65, and
The pulley 67 is rotatably fitted into the rotation support shaft 64 via a sleeve 113 and a bearing 115, and is connected to the fourth pulley 65 and the third pulley 6.
3, a second endless belt 73b is wound around it.

Above the fourth pulley 65 is an upper frame 41.
An upper detection device 117 is provided for detecting the origin position of the punch 11 (upper mold) suspended from the upper die.

As shown in FIG. 2 and FIGS. 4 to 6, this upper detection device 117 includes two dogs 119a and 119b mounted on the fourth pulley 65, and two sets of sensors 121a corresponding to the dogs 119a and 119b. , 121b, a punch 11 (upper die), and a die 15.
(lower die), the origin position is confirmed and the punch 11 and die 15 are aligned.

In addition, the dogs 119a and 119b are magnetic bodies,
The sensors 121a and 121b are devices that detect the magnetic force, but are not limited thereto.

Next, the sixth pulley 71
A punch holder 69 is fitted and held in a predetermined direction via a holding plate 123b and a key 123a.
A third endless belt 73c is fitted to the outer circumference of the upper end, and is attached to the sixth pulley 71 and the fifth pulley 67.
is being passed around.

Inside the punch holder 69 is a stripper rod 1.
The punch 11 is inserted through 25, and the punch 11
is constantly urged upward via the stripper rod 125, spring seat 127, and return spring 129.

Next, the transmission mechanism 49b of the lower turret 17 is
A drive gear 51a of a rotary drive device 47a such as a servo motor attached to the lower frame 29, a transmission gear 53a meshing with the drive gear 51a,
A first pulley 57a is provided coaxially with the rotation support shaft 55a of the transmission gear 53a, and a second pulley 61a and a third pulley 63a are provided as rotating bodies that are exactly the same as those provided on the upper turret 13 described above. The clutch mechanism 59a, the fourth pulley 65a and the fifth pulley 67a of the rotation support shaft 64a provided on the lower turret 17, the sixth pulley 71a fitted to the die holder 131, and the first pulley 57
A first endless belt 73d, a second endless belt 73e, which are respectively stretched from a to the sixth pulley 71a.
It is composed of a third endless belt 73f.

The other configurations of the transmission mechanism 49b are exactly the same as those explained in connection with the transmission mechanism 49a of the upper turret 13, so the same reference numerals are given and the explanation will be omitted.

A disk support 1 is placed on the lower turret 17.
33. A lower detection device 139 for detecting the origin position of the die 15 (lower mold) is provided at the lower part of the die holder 131 which is rotatably supported via the die receiving member 135, bearing 137, etc. .

This lower detection device 139 is shown in FIGS.
8, a dog 141 attached to the lower part of the die 15 and a sensor 1 whose position can be adjusted freely
43, and this sensor 143 is movable along a guide rail 147 via a bearing 145 by a fluid pressure cylinder 149.

That is, the lower detection device 139
It is designed so that it can move forward and backward so as not to get in the way during the rotation of step 1.

Further, the rotary drive devices 47a and 47b provided in the upper and lower turrets 13 and 17, respectively, are rotationally driven synchronously based on the same command value from a numerical control device (not shown), and the respective rotary drive devices Any deviation in rotation of the rotational drives 47a, 47b is compared and corrected by a tachogenerator (not shown), a comparison correction circuit, etc. (not shown) provided in each rotational drive device 47a, 47b, and the rotational angles are controlled to be the same.

Next, when positioning the punch 11 and die 15, an operation for setting the origin positions of the punch 11 and die 15 in advance will be described.

First, the punch holder 69 and die holder 131 are inserted into the upper turret 13 and the lower turret 17 in a predetermined direction via the key 123a or the like.

Next, the clutch mechanisms 59, 59a are operated to engage the clutches, and an NC control device (not shown) is operated to drive the rotary drive devices 47a, 47b, and the punch holder 69 is further connected to the punch holder 69 via the transmission mechanisms 49a, 49b. The die holder 131 is rotated. First, the dog 141 attached to the lower part of the die holder 131 is rotated until the sensor 143 detects it, and when the dog 141 is detected by the sensor 143, that is, when the origin of the die holder 131 is confirmed, the rotation drive devices 47a and 47b are temporarily stopped. let

Next, the origin of the punch holder 69 can be confirmed by checking the two dogs 119 provided on the fourth pulley 65 as described above.
a, 119b and two sensors 121a, 121b attached to the upper frame 41. For example, when the dog 119 is in the state shown in FIG.
a, 119b, sensors 121a, 12
The state of 1b is as shown in FIG. 9b. That is, the ON ranges of the sensors 121a and 121b are α ₁ and α ₂ , and assuming that the fourth pulley 65 rotates in the direction of the arrow (counterclockwise), the first dog 1
19a as it is, the second dog 11
9b is adjusted so that it is located within the ON region α ₂ of the sensor 121b. And sensors 121a, 12
If ON areas α ₁ and α ₂ of 1b are 2θ, the second dog 119b is at a position of Δθ, and this Δθ is Δθ/
By adjusting 2 to, for example, 0.05,
As shown in FIG. 9c, the sensors 121a and 121b
The range when both are ON is set as the origin.

If the origin positions of the punch holder 69 and the die holder 131 are set in advance in this way,
Inserting and positioning the punch 11 and die 15 can also be done with high precision.

Next, the operation of this embodiment constructed as described above will be explained.

First, the punch holder 69 of the upper turret 13
and the die holder 131 of the lower turret 17,
A punch 11 and a die 15 are inserted, respectively.

Next, the origin positions of the punch 11 and the die 15 are confirmed by the upper detection device 117 and the lower detection device 139. Then, the clutch mechanism 5
The fluid pressure cylinder 83 of 9,59a is extended and the shot pin 93 provided on the piston 87 is activated.
are engaged with the engagement holes 101 of the third pulleys 63 and 63a, respectively.

From this state, an NC control device (not shown) is operated, and the same command value is given from this control device to each of the rotary drive devices 47a, 47b.

Then, when the respective rotation drive devices 47a, 47b start rotating, the first pulleys 57, 57a are
rotates, and at the same time the first endless belt 73a,
The second pulleys 61, 61a are rotated in a predetermined direction via 73d. When the second pulleys 61, 61a start rotating, the third pulleys 63, 63a connected via the shot pin 93 rotate, and the third pulleys 63, 63a and the second endless belt 73
b, the fourth pulley 6 connected via 73e
5 and 65a also rotate at the same time.

When the fourth pulley 65, 65a rotates, the fifth pulley 67, 67a provided coaxially rotates,
This fifth pulley 67, 67a and the third endless belt 7
Punch holder 69 interlocked via 3c and 73f
And the die holder 131 is synchronously rotated by a predetermined angle.

In this state, the rotary drive devices 47a and 47b are temporarily stopped by a command from an NC control device (not shown), and at the same time, the clutch mechanism 5 is stopped.
The fluid pressure cylinders 83 of the third pulleys 63, 63a are contracted and the shot pins 93 engaged with the engagement holes 101 of the third pulleys 63, 63a are pulled out to disconnect the transmission state. Then, the disengaged state of the clutch is confirmed using a display device (not shown) that is linked to the clutch confirmation mechanism.

The shot pin 93 returns to its original position due to the elastic force of the return spring 89 as the piston 87 contracts.

Further, the third pulleys 63, 63a have a friction plate 75 which is in pressure contact with the lower surface of the third pulleys 63, 63a when the clutch is disengaged.
a. The punch holder 69, the punch 11 and the die 15 which are fitted into the die holder 131 are also locked in a predetermined position. Therefore, the upper and lower turrets 1
It is possible to prevent the punch 11 and the die 15 from rotating by themselves during the rotation of the clutch mechanisms 59 and 17, thereby preventing misalignment with the clutch mechanisms 59 and 59a.

Note that when the clutch mechanism 59 is disengaged as described above, the upper and lower turrets 13 and 17 are in a free state and can freely rotate.
When indexing to a predetermined rotation angle via etc.,
This is done by operating the index detection device 107 while the clutch is disengaged as described above.

With the punch 11 and die 15 locked as described above, a predetermined workpiece W is inserted,
This is a punching process.

When the punching process in the predetermined direction is completed in this way, the respective clutches are put in again as described above, and the rotary drive devices 47a and 47b are driven to rotate synchronously by the same command value from the NC control device (not shown). As mentioned above, the transmission mechanisms 49a, 49
After the punch 11 and die 15 are rotated at a predetermined angle via b, the punching process is performed. By sequentially repeating such operations, it is possible to perform punching with high precision and to perform the work efficiently.

In addition, when performing another punching process, when replacing the punch holder 69, punch 11, die holder 131, die 15, etc., the origin of the punch 11 and die 15 can be confirmed using the upper detection device 117 as described above. , and the lower detection device 139.

As can be understood from the above description of the embodiments, the gist of the present invention is as described in the claims. A brake device is provided to perform a braking operation on the rotary body connected to the rotary body and the die holder 131, and a confirmation device is provided to confirm whether the brake device is on or off.

Therefore, the punch holder 69 and the die holder 1
31 using separate rotation drive devices 47a and 47b, it is possible to check whether both can be rotated, and there is no malfunction such as, for example, causing only one to rotate.

Further, in the present invention, the upper and lower frames 41, 2
Each rotating body provided in interlocking connection with each rotary drive device 47a, 47b attached to the upper and lower turrets 13, 17 is capable of being freely engaged and disengaged with the engagement hole of each rotating body supported by the upper and lower turrets 13, 17, and has a brake device. A plurality of shot pins 93 are provided for releasing the brake.

Therefore, in order to rotate the punch holder 69 and die holder 131, the upper and lower frames 4
Rotating body supported by 1, 29 and upper and lower turrets 1
The rotating body supported by 3 and 17 is connected to the shot pin 9.
3, the brake of the brake device is released, and the punch holder 69 and die holder 131 can rotate quickly.
Conversely, when the connection by the shot pin 93 is released, the rotating bodies on the upper and lower turrets 13, 17 are braked by the action of the brake device to maintain the stopped state and maintain the punch holder 69 and die holder 131 in their original positions. It is.

That is, each rotary drive device 47a, 47b, the punch holder 69 on each turret, and the die holder 131
When the punch holder 69 and the die holder 131 are always in the original position, and the punch holder 69 and the die holder 131 are rotated separately by separate rotation drive devices 47a and 47b, synchronous rotation and Rotational indexing can be easily performed.

Note that this invention is not limited to the above embodiments,
Other embodiments are also possible.

[Brief explanation of drawings]

Fig. 1 is a schematic front view of a turret punch press embodying the present invention, Fig. 2 is an enlarged vertical sectional view of the main parts, Fig. 3 is a plan view of the transmission mechanism, Figs. Figure 6 shows a plan view, a vertical front view, a side view, and a seventh view of the upper detection device installed in the upper turret.
8 are a plan view and a front view of the lower detection device provided on the lower turret, and FIGS. 9a, b, and c are explanatory diagrams of the origin confirmation operation using the upper detection device. 11...Punch, 15...Die, 49a, 49
b...Transmission mechanism, 47a, 47b...Rotary drive device, 59, 59a...Clutch mechanism.

Claims (1)

[Claims] 1. An upper turret 13 rotatably supported on an upper frame 41 and a lower turret 17 rotatably supported on a lower frame 29 are vertically opposed to each other, and the upper turret 13 is rotatably supported. An upper driven-side pulley 63 provided in interlocking connection with the supported punch holder 69 and an upper driving-side pulley 61 provided in interlocking connection with the rotary drive device 47a mounted on the upper frame 41. A lower driven pulley 63a is provided to be interlocked and disconnected via the first clutch mechanism 59, and is interlocked and connected to the die holder 131, which is rotatably supported by the lower turret 17, facing the punch holder 69. and,
Rotary drive device 47b attached to lower frame 29
A punch press is constructed in which a lower drive-side pulley 61a provided in interlocking connection with the lower drive-side pulley 61a can be freely interlocked and disconnected via a second clutch mechanism 59a. , 63a are rotatably supported by the annular body 10 via an insulator 103.
5, and each pulley 63, 63a on the driven side is provided with a friction plate 75a which can come into contact with and detach from the annular body 105, biased toward the annular body 105 side, and each pulley 63, 63a on the driven side. A push rod 93b capable of pressing the friction plate 75a is provided in a plurality of engagement holes 101 provided in the engagement hole 101 so as to be movable up and down.
Each friction plate 7 is connected to each of the drive side pulleys 61, 61a through each push rod 93b and is detachable from each engagement hole 101 of each driven side pulley 63, 63a.
Shot pin 93 that presses 5a against the urging force
is provided to be movable up and down, and is provided with an energizing device that passes a weak current between the annular body 105 and the friction plate 75a to confirm contact and separation between the annular body 105 and the friction plate 75a. Punch press.