JPH0824974B2 - Method for controlling mold rotating device of turret punch press - Google Patents

Description

TECHNICAL FIELD The present invention relates to a control method for effectively controlling a die rotating device of a turret punch press.

[Prior Art] A conventional die rotating device for a turret punch press is
A drive shaft 4 and a drive source 5 for the upper rotary holder are provided on the frame 2 which supports the upper turret 1 as schematically shown in the figure, and the lower side is constituted by a mechanism including the same shaft 4, drive source 5 and the like. A device for rotating the rotary holder 3 of the upper and lower molds, which is configured so that the drive source 5 and the passive shaft 6 are engaged with each other by the clutch 7 when each mold is rotated, and is schematically shown in FIG. A method is known in which the mold holders 3, 3 of the upper and lower turrets 102, 103 are integrally swung.

[Problems to be Solved by the Invention]

However, the former device has the advantage that all the molds can be rotated, but the mold rotation consisting of the passive shaft 6 and the clutch 7 between the part that supports the turret and the part that installs the mold. Since it is necessary to provide a passive part, the array diameter of the mold must be increased correspondingly, and there is a serious drawback that it is not suitable for a small machine with a small turret diameter. Since the side drive source is provided, when either or both rotational position detection systems or command systems malfunction during rotational positioning of the die, the upper die and the lower die will have different index angles. There is a drawback that the molds collide with each other, and there is also a problem that the molds cannot rotate simultaneously with the turret.

On the other hand, the latter turret type turret in which a die rotating device is incorporated is a slewing type, so that the number of dies mounted is smaller than that of the rotary turret type.

[Means for solving the problem]

The present invention has been made in view of the above-mentioned circumstances, and a single mold rotation drive source installed on a frame is branched into rotation power of an upper mold rotation holder and a lower mold rotation holder. , A conventional mold array part, by transmitting to a mold rotation drive shaft provided coaxially with each turret rotation shaft, and interlockingly connecting the mold rotation drive system even when the turret rotates. The rotary passive part and the drive part between the turret support part and the turret support part are eliminated, the above-mentioned drawbacks and problems do not occur, and even if the detection system malfunctions, there is no danger of colliding the mold and the turret diameter. In the mold rotating device of the turret punch press, which can handle from large to small, the rotation of the turret and the rotation of the mold can be driven simultaneously, and at the same time, the rotation of the turret causes differential rotation of the mold. Even if it is the case, it was made for the purpose of providing a method for controlling a die rotating device of a turret punch press, which enables efficient positioning control of the die to an index angle by correcting the differential rotation. The structure is such that a mold rotation drive shaft is provided coaxially with each turret rotation shaft of a turret punch press in which multiple molds are mounted on a rotatable upper turret and a lower turret, and one is provided on the frame. The power from the mold rotation drive source is transmitted to the branch shaft, and the power is branched and transmitted to the upper turret mold rotation drive shaft and the lower turret mold rotation drive shaft to which the bevel gear is fixed via a transmission mechanism. The bevel gear provided on the turret for driving the mold rotation drive shaft at the same time to mesh with the bevel gear and transmit power to the mold rotation holder is rotated on the turret. In a mold rotating device of a turret punch press, which transmits the power to one or a plurality of mold rotating holders freely installed to rotate the molds, the molds held by the mold rotating holders are When the turret is positioned at the punch position after rotating the turret for one rotation or more from the state where the turret is positioned at the punch position and the index angle of the mold rotation holder is set, the mold rotation is performed by the rotation of the turret. The differential rotation angle generated in the holder is calculated by monitoring and detecting the rotation speed or the rotation angle of the turret until the mold rotation holder is positioned at the punch position, and the differential rotation angle is calculated based on the calculated value. Is generated to control the index angle to be set in the mold rotation holder.

[Action]

That is, according to the present invention, the drive system of the die rotating device of the turret punch press is performed by one drive source, and the drive system is interlocked even when the turret is rotated. Even when the detection system or command system of the drive system of the mold rotating device malfunctions, the upper and lower molds can be prevented from colliding, and the mold rotation between the mold array part and the turret support part of the turret can be prevented. By removing the passive part or drive part of the turret, the turret diameter can be reduced, and the number of mold devices for the rotary turret can be made larger than that of the rotating type, and the turret and the mold can be rotated at the same time. In a die rotating device for a turret punch press that can be applied regardless of the diameter of the turret, even if the die rotates differentially due to the rotation of the turret, the differential rotation Fast, it can be accurately corrected.

〔Example〕

 Next, an example of implementation of the present invention will be described with reference to the drawings.

In FIG. 1, 101 is a frame of the press main body, 11 is a servomotor that is a mold rotation driving source installed on the frame 101, 12 is a pinion fixed to the output shaft end of the servomotor 11, and 13 is rotatable. Supported by the servo motor 11
A branch shaft for branching the output of the upper turret side mold rotary power and a lower turret side mold rotary power, 14 is a spur gear fixed to the branch shaft 13 and transmitting the power of the servomotor 11 to the branch shaft 13, , 16 are bevel gears fixed to the branch shaft 13, 17 is an upper turret side horizontal transmission shaft rotatably supported, 18 is also a lower turret side horizontal transmission shaft, 19 and 20 are the upper and lower horizontal transmission shafts 17 respectively. The bevel gears are fixed to 18 and 18.
, And the bevel gear 20 meshes with the same 16, and the servo motor
The power of 11 is transmitted from the pinion 12 to the branch shaft 13 by the spur gear 14, and by the bevel gears 15 and 19 the upper turret side horizontal transmission shaft 1
7, the lower turret horizontal transmission shaft 18 by the bevel gears 16 and 20 as well.
To be transmitted to.

102 is an upper turret which is a punch turret, 21 is a bevel gear fixed to the end of the upper turret side horizontal transmission shaft 19, 22 is an upper vertical transmission shaft rotatably supported, and 23 is fixed to the vertical transmission shaft 22. The bevel gear that transmits rotational power to the upper vertical transmission shaft 22 by meshing with the bevel gear 21, 24 is a toothed pulley fixed to the end of the upper vertical transmission shaft 22, and 25 is the upper turret rotation shaft 26. Mold rotation drive shaft supported coaxially and rotatably,
27 is a toothed pulley fixed to the end of the mold rotation drive shaft 25, 28 is a toothed belt that meshes with the toothed pulleys 24 and 27 and transmits rotational power to the mold rotation drive shaft 25, 29 Is a bevel gear fixed to the mold rotation drive shaft 25, 30 is an intermediate shaft rotatably supported and installed on the upper turret 102, 31 is the intermediate shaft 30
The bevel gear 31 is fixed to the bevel gear 31, and the bevel gear 31 meshes with the bevel gear 29 to transmit rotational power to the intermediate shaft 30. A worm 32 is rotatably supported and is arranged coaxially with the intermediate shaft 30 and connected to the intermediate shaft 30 by a coupling 33.

34 is a worm wheel that meshes with the worm 32,
The punch die 36 is integrally formed on the outer periphery of the die rotating holder 35 with the holder and is inserted through a key and a key groove so as to rotate integrally with the holder 35.
It is designed to rotate by rotating 32.

Although the above 21 to 36 relate to the transmission mechanism on the upper turret 102 side, the lower turret 10 which is a die turret
Since the transmission mechanism on the 3 side is the same as that on the side of the upper turret 102, the transmission mechanism on the side of the lower turret 103 is given the same reference numeral as that on the side of the upper turret 102, while 36 'is a die mold. Is.

Further, the upper turret 102 and the lower turret 103 are fixed to the above-mentioned rotatably supported turret rotation shafts 26, and spur gears 104 fixed to the respective turret rotation shafts 26 are shown in mesh with the spur gears 104. It is designed to be rotated by a turret rotation drive system which is linked to a spur gear.

An example of a mold rotating device to which the method of the present invention configured as described above is applied is a servo motor 11 which is a mold rotation drive source.
The rotational power of the upper and lower molds 36,36 '
Since it can be transmitted to the mold holder 35 of the molds 36 and 36 'and both molds 36, 36' can be rotated by the same desired rotation angle (hereinafter referred to as index angle), the molds 36, 36 'are rotationally driven. Even if the detection system or command system for
Since the rotated positions of the upper and lower molds 36, 36 'are the same,
It is possible to prevent a collision accident between both molds.

By the way, since the mold rotating device can rotate the turrets 102 and 103 and the molds 36 and 36 'at the same time, the mold rotating holder 35 positioned at the punch position is positioned at the desired index angle. The upper and lower molds 36, 36 'held by the turret 10 from this state.
If the 2,103 rotates, the intermediate shaft on the turret 102,103
Since the bevel gear 31 of 30 revolves on the bevel gear 29 of the mold rotation drive shaft 25, the bevel gear 31 undergoes differential rotation due to the revolution. The principle of this differential rotation is as follows. Hereinafter, for convenience of description, only the side of the upper turret 102 will be described.

Now, at the punch position shown by the solid line in FIG. 3, the die 36 is moved from the origin (the position where the diameter line of the turret 102 passes in FIG. 3) from the origin 30.
It is assumed that it is positioned at the index angle rotated by one degree.

Since the turret 102 is rotated in this state, the mold rotation drive system is locked by the servo lock of the servo motor 11,
If the upper turret 102 is rotated 270 degrees in the B direction (clockwise direction), the bevel gear 29 is not rotated by the lock and is fixed, so that the bevel gear 31 on the turret 102 is fixed and rotated. If the gear ratio with the bevel gear 29 is set to 1: 1, the bevel gear is rotated by the above 270 ° rotation of the upper turret 102.
Roll on top of 29 and make 3/4 rotation (rotation) (see chain line in Fig. 3).

At this time, the worm wheel 34 which is directly connected to the bevel gear 31 and meshes with the worm 32 is Since it rotates, the mold rotating holder 35 and the punch mold 36 held by this holder 35 also rotate the same angle as this worm wheel 34, and perform differential rotation.

Thus, when the punch die 36 that has been differentially rotated is positioned at the punch position and is used again, the turret 102
If the turret 102 is rotated in the reverse direction by rotating the turret 102 in the direction A (the direction opposite to the direction B) in FIG. You have to rotate / 4 turns.

However, if the turret 102 is rotated in the B direction in FIG. 3, the rotation of the turret 102 is only 1/4 rotation. Therefore, rotating the turret 102 in the B direction moves the die 36 to the punch position in a shorter time. Can be made.

However, when the turret 102 is rotated 1/4 turn in the B direction when the mold 36 is at the position of the chain line, the worm wheel 34
Means that the turret 102 has been differentially rotated by one rotation when viewed from the initial position of the mold 36 (point located at the punch position) in FIG.
In order to position the mold 36 at the punch position by rotating in the direction B from the position of 6 in the position shown by the chain line in FIG. 3 and at the desired index angle at the punch position,
The index angle of the mold 36 above, It is necessary to correct only the differential rotation angle of. From the above formula, it is convenient to set the worm reduction ratio to a divisor of 360 degrees.

Therefore, in the present invention, the index angle of the die 36 that was in the punch position before the turret 102 was rotated,
In order to position the turret 102 at a desired index angle after the turret 102 has rotated one rotation or more, it is necessary to monitor the number of rotations of the turret 102, as viewed from the position before the turret 102 is rotated. When the differential rotation angle to be corrected is calculated by the above formula and the index angle is positioned on the mold 36, the index angle command set in the mold 36 is calculated according to the calculated value of the differential rotation angle. By correcting the value, the drive source for rotating the mold is controlled.

Thereby, the differential rotation angle can be corrected at the time of positioning the die 36 at the punch position (rotation of the turret) and positioning the die 36 at the index angle (rotation of the die rotation holder). Therefore, the working operation can be performed smoothly and efficiently.

Note that, for the monitoring and detection of the rotation speed or rotation angle of the turret 102 (103), for example, the rotation angle of the motor of the rotary drive system of the turret 102 (103) is monitored, and this is converted and detected.
The rotation speed or rotation angle of the turret itself may be directly monitored and detected.

〔The invention's effect〕

The present invention is as described above, and in the mold rotating device in which the mold rotating drive systems of the upper and lower turrets are interlockingly connected, and the mold rotating drive shaft and the turret rotating shaft are provided coaxially, Since the turret rotation shaft is provided coaxially with the turret, the differential rotation angle of the mold rotating holder that occurs when the turret is rotated can be controlled when the mold rotating holder is positioned at the index angle. . Therefore, in order to position the molds of the upper and lower turrets at a desired index angle, the index angle positioning drive is performed simultaneously with the rotation of the turret, or the mold rotation position detection system or command system malfunctions. Also, it is possible to realize highly reliable control of the mold rotation drive system without the risk of causing the molds to collide with each other. Particularly, when the die of the die rotating holder is positioned at the punch position, it is necessary to return the die to the original punch position after rotating the turret in that state one or more times in any direction. At this time, since the differential rotation angle generated in the mold rotation holder by the rotation of the turret can be corrected and the mold can be positioned and driven to a desired index angle, it greatly contributes to the improvement of work efficiency. There is something.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an example of a drive system of a mold rotating device to which the method of the present invention is applied, FIG. 2 is a sectional view of a turret rotation supporting shaft portion, FIG. 3 is a diagram for explaining differential, and FIG. FIG. 5 is a schematic view of a mold rotating device of a conventional turret punch press, and FIG. 5 is a schematic view of a mold rotating device of a turret rotation type. 101 ... Frame, 102 ... Upper Turret, 103 ... Lower Turret, 1
1 ... Servo motor, 12 ... Pinion, 13 ... Branch shaft, 14 ... Spur gear, 15, 16 ... Bevel gear, 17 ... Upper turret side horizontal transmission shaft, 1
5 ... Lower turret horizontal transmission shaft, 19, 20, 21 ... Bevel gear, 22 ... Upper vertical transmission shaft, 23 ... Bevel gear, 24 ... Toothed pulley, 25 ... Mold rotation drive shaft, 26 ... Upper turret rotation shaft, 27 ... toothed pulley,
28 ... Toothed belt, 29 ... Bevel gear, 30 ... Intermediate shaft, 31 ... Bevel gear, 32 ... Worm gear, 33 ... Coupling, 34 ... Worm wheel, 35 ... Mold rotation holder, 36 ... Mold

Claims (1)

[Claims] 1. A mold rotation drive shaft is provided coaxially with each turret rotation shaft of a turret punch press in which a large number of molds are mounted on a rotatable upper turret and a lower turret, and one mold is provided on a frame. The power from the mold rotary drive source is transmitted to the branch shaft, and the power is branched and transmitted to the upper turret mold rotary drive shaft and the lower turret mold rotary drive shaft having bevel gears fixed thereto through a transmission mechanism, and the molds One or more rotatably installed on the turret by a bevel gear provided on the turret for driving the rotary drive shaft at the same time to mesh with the bevel gear and transmit power to the mold rotating holder. In the mold rotating device of the turret punch press, which transmits the power to the mold rotating holder of No. 1 and rotates the mold, the mold held by the mold rotating holder is moved to the punch position. When the turret is positioned at the punch position after the turret has been rotated one or more times from the state of being positioned in the position and the index angle of the mold rotation holder is set, the rotation of the turret causes the mold rotation holder to rotate. The differential rotation angle is calculated by monitoring and detecting the rotation speed or rotation angle of the turret until the mold rotation holder is positioned at the punch position,
A method for controlling a die rotating device of a turret punch press, which comprises generating a command for correcting the differential rotation angle based on the calculated value and controlling an index angle to be set in the die rotating holder.