JPH0631495A - Cushion pin self-attaching device in press machine - Google Patents

Abstract

PURPOSE:To provide a cushion pin self-attaching device of a press machine so that a cushion pin can be automatically and surely attached in a pin hole arranged in a lattice like on a bolster corresponding to the kind of punch ring and the monitoring can be easily executed. CONSTITUTION:A head to be supported from the down side is respectively formed at an upper end of each cushion pin, and a ring like receiving groove receiving the head is formed at an upper end part of a pin hole 10 of a bolster 1. A receiving box 18 provided with a cushion pin pushing device which drives with pressurizing the cushion inserted in the pin hole from the under part so as to project the cushion pin from the upper surface of bolster, and a pin hole 18a for storing the cushion pin corresponding to the lattice which is arranged along a rail 19 installed between this cushion pin pushing device, and a running system cushion pin clamping device 23 running along the rail 19 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushion pin automatic mounting device for a press machine for automatically mounting cushion pins in pin holes arranged in a lattice on a bolster according to the type of punch ring. is there.

[0002]

2. Description of the Related Art FIG. 7 schematically shows a press machine in which cushion pins are mounted by an automatic cushion pin mounting device. That is, the pin hole 1a into which the cushion pin 7 is mounted
On a bolster 1 arranged in a lattice pattern, a lower die stand 2 having a punch body 3 and a punch ring 3a mounted thereon is placed. An upper die 6 attached to the punch is attached to an upper die base 5 attached to the ram 4. When the work 9 shown in FIG. 1B is manufactured, the lower mold cushion pin 7 a protruding from the cushion plate 7 c guided by the lower mold base 2 is driven upward by a hydraulic cylinder located below the bolster 1. Push with pin 7 and punch ring 3a
The upper surface of the upper die 6 is positioned substantially flush with the upper surface of the punch body 3 and is lowered when the upper die 6 is moved downward from above so that the work 9 is not wrinkled.

Therefore, it is necessary to select the position of the cushion pin 7 according to the punch, and the conventional cushion pin automatic mounting device for this purpose is carried out from the press machine to the bolster mount 8 as shown in FIG. And the cushion pin 7
The O-ring 7d mounted on the bolster 1 is locked in the engagement groove 7e formed in the bolster 1, and the magnet 8a mounted on the tip of the hydraulic cylinder rod 8b attached to each cushion pin 7 is selectively excited. Then, cushion pin 7
Was absorbed and disengaged from the engaging groove 7e, and was taken out from the inside of the bolster 1.

[0004]

That is, since the cushion pin 7 is suspended by the engagement groove 7e of the O-ring 7d and hung on the bolster 1 to be carried into the press machine, it may drop during movement. Further, it is difficult to visually confirm from the outside of the bolster 1 whether or not it is properly mounted, or it is difficult to find damage. Furthermore, there is no device that automatically inspects the wearing state. Therefore,
SUMMARY OF THE INVENTION It is an object of the present invention to provide a cushion pin automatic mounting device for a press machine of the kind described at the beginning, in which the cushion pin can be securely mounted and its monitoring is easy.

[0005]

SUMMARY OF THE INVENTION The present invention is a lower mold cushion that is slidably guided up and down by a lower mold base so that a punch ring located around a punch body mounted on the lower mold base is moved upward. An automatic cushion pin mounting device of a press machine for automatically mounting cushion pins in pin holes arranged in a grid on the bolster according to the type of punch ring in order to drive the pins upward from the bolster. In order to achieve this object, according to claim 1, each cushion pin is formed with a head having an enlarged outer diameter and supported from below, and the head is received at the upper end of the pin hole of the bolster. Each ring-shaped receiving groove is formed so that the cushion pin protrudes from the upper surface of the bolster below the bolster mounting table placed at the bolster carrying-out position from the press machine. , A cushion pins extrusion apparatus for pressing driving a cushion is inserted into the pin hole from below,
A storage box arranged along a rail laid between the cushion pin pushing device and a cushion pin storing pin hole corresponding to a lattice, and a traveling type cushion pin gripping device that runs along the rail. This traveling type cushion pin gripping device is provided with a traveling base equipped with a traveling drive device for automatically traveling between the cushion pin pushing device and the storage box, and the traveling base is guided so as to be vertically movable and At least one rail crossing direction is provided on a lifting base having an elevating drive device for elevating and lowering, and a support rod having an advancing / retreating drive device guided by the elevating base so as to be capable of advancing and retreating in the rail direction. It consists of a group of gripping devices that are installed by the number of pin holes in the row and that grips the upper ends of the associated cushion pins. By comparing the memory that stores the array pattern of the memory pin with the array pattern that was used immediately before being read from this memory and the newly specified array pattern, the pin hole position and the new insertion of the cushion pin from the bolster are inserted. By providing the insertion / removal position determination means for determining the pin hole position, the traveling base is moved to the bolster carry-out position and the cushion pin position according to the determination result of the insertion / removal position determination means with the cushion pin protruding from the upper surface of the bolster. A control unit was attached to make the cushion box repeatedly travel between predetermined positions of the storage box, move the gripping device forward and backward to the row of pin holes to be inserted and removed at the predetermined position, and lower it from the running position to grip or release the cushion pin. It is characterized by

In order to inspect the mounting state of the cushion pin on the bolster, according to claim 2, each gripping device is provided with a sensor for detecting the gripping of the cushion pin, and the detection signals of these sensors are taken in. The cushion pin array pattern data is created, and an inspection means is provided for judging whether the cushion pin mounting position is good or bad in the bolster by comparing the created data with the specified array pattern.

[0007]

When changing the arrangement of the cushion pins of the bolster, the bolster is carried out from the press machine to the mounting table, and the insertion / removal position determination means is made to input a new arrangement pattern. First, the cushion pin pushing device is operated so that the entire cushion pin is projected from the bolster so that it can be gripped. Move the traveling base to a predetermined position on the bolster, and according to the result of the insertion / removal position judgment means,
The support rod is advanced and retracted to the row for insertion and removal, the elevating base is lowered, the gripping device at the position to be extracted is operated to be gripped, and then raised to completely extract the cushion pin from the pin hole. After that, the traveling base is repeatedly run between the bolster carry-out position and the predetermined position of the cushion pin storage box, and the gripping device is moved forward and backward to the row of pin holes in which the gripping device should be inserted and removed at the predetermined position, and then lowered from the running position to the cushion. The pin is gripped or released.

[0008]

1 to 4 show a cushion pin automatic mounting apparatus for a press machine according to an embodiment of the present invention. The cushion pin 17 of the bolster 1 of the press machine described in FIG.
10 pin holes 10 are provided at a pitch of 125 mm, for example, in a row orthogonal to the carry-out direction, and 250 mm in the carry-out direction.
The pitch is arranged in about 15 rows. As shown in FIG. 3, each cushion pin 17 has a head 17a having an enlarged outer diameter formed at the upper end thereof, and a pin hole 10 of the bolster 1 has a ring-shaped receiving groove 11 for receiving the head 17a from below. Has been formed.

FIG. 1 shows a schematic structure of such a cushion pin automatic mounting device for a bolster 1. The traveling cushion pin gripping device is guided by rails 19 arranged along both sides of the bolster carry-out position. A storage box 18 arranged between the bolster 1 and the rail 19 that have been carried out.
Traveling bases 20 and 20a on both sides provided with a traveling drive device for automatically traveling between the two, and elevating bases 21 and 21a on both sides which are respectively guided by these traveling bases so as to be able to ascend and descend and to which an elevating drive device is attached. The position of the pin hole 10 in the rail traverse direction row on the support rod 22 which is traversed by the rail 19 and whose both ends are guided by the elevating bases 21 and 21a on both sides so as to be able to advance and retreat in the rail direction, and to which the advancing and retracting drive device is attached. Corresponding to the above, at least one row, that is, 10 pieces are provided below, and is configured by a gripping device 23 that grips the tip end portion of the cushion pin 17.

In the storage box 18, pin holes 18a are arranged in a projecting state in a number corresponding to the position corresponding to the pin holes 10 of the bolster 1 in the rail traverse direction, and the corresponding number of rows in the rail direction. The pin holes 10 are arranged so as to be shorter than the actual pitch of the pin holes 10. Further, below the bolster table 14 at the bolster carry-out position from the press machine,
As shown in FIG. 3, the cushion pin 17 inserted into the pin hole 10 is pressed from below so as to project from the upper surface 1b of the bolster to the position indicated by the dotted line so that the cushion pin 17 can be gripped. Extruder 15
Are arranged. This cushion pin pushing device
The common pressing plate 15b is pressed and driven by the hydraulic cylinders 15a arranged at a plurality of positions.

As shown in FIG. 2, the traveling bases 20 and 20a.
Is equipped with a drive device for driving the wheels 29 with a motor so as to travel along the rails 19. Traveling base 20,
20a is equipped with a lifting drive device that guides a rack 31 attached to the lifting bases 21 and 21a and drives a gear 33 with a motor 32. Lifting base 21, 21a
Is equipped with an advancing / retreating drive device in the rail direction that guides a rack 35 fixed to the support rod 22 and drives a gear 37 with a motor 36. As shown in FIG. 3, the gripping device 23 includes a bifurcated nipping claw 25 driven by an air cylinder 24.
It is composed of Then, the link 26 hinged to the opposite side of the bifurcated nipping claw 25 hinged at the intermediate position by the pin 25a is moved up and down by the rod 24a,
The cushion pin 17 is driven from the released state shown in FIG. A to the sandwiched state shown in FIG.

As shown in FIG. 2, the drive unit described above is provided with the following control unit. First, the cushion pin push-out device 15 is provided with push-out control means 16 which is moved forward at the start of the automatic mounting operation and is returned at the completion of the automatic mounting operation. The traveling drive device includes traveling control means for traveling between the position sensors 19a provided at the bolster take-out positions on the rails 19 on both sides and the position sensor 19b provided at the stop position of the storage box 18 so that the traveling drive device stops between them. 40 is attached.

The motor 32 raises and lowers the raising and lowering bases 21 and 21a so that the holding device 23 moves up and down between the holding position of the bolster 1 and the cushion pin 17 of the storage box 18 and the upper position where it can be pulled out. An elevating control means 41 is attached. For each gripping device 23 and motor 36, a memory 42 that stores a plurality of types of arrangement patterns of the cushion pin 17 that are assumed in the bolster 1 is compared with the arrangement pattern that was worked immediately before and a new arrangement pattern, and the bolster 1 Also, the insertion / removal position determination means 43 for determining the pin hole position for extracting the cushion pin 17 from the storage box 18 and the newly inserted pin hole position, and the forward / backward control for driving the support rod 22 forward / backward in accordance with the result of the determination by the removal / insertion position determination means. Means 44 and similarly gripping control means 45 for causing the gripping device 23 to grip or release the cushion pin 17 according to the result of this determination are attached.

Further, by taking in the detection signal of the touch sensor 25b provided on the sandwiching claw 25, the actual arrangement pattern data of the cushion pins is created depending on whether or not the gripping detection signal is generated when each sandwiching claw 25 is operated. Then, the bolster side inspection means 46 for judging whether or not the cushion pin 17 is inserted at the selected arrangement pattern position of the bolster 1 and the cushion pin 17 remain at the inverted arrangement pattern position in comparison with the designated arrangement pattern. A storage box side inspection means 47 for determining whether or not it is attached is additionally provided. These inspection means display the inspection result as OK or NG, and in the case of NG, which pin hole 10, 18 is detected as to which position the insertion / removal error has occurred, as shown in FIG. 4, for example.
A display device 48 for graphically displaying a and displaying an X mark 48a is attached. Reference numeral 49 is a sequence control means for sequentially controlling the cushion pin pushing device 15 and the respective means 40, 41, 44 to 47 described above.

The operation of the cushion pin automatic mounting apparatus of the press machine thus constructed operates as follows in accordance with the flowchart of FIG. When changing the arrangement of the cushion pins 17 of the bolster 1, the bolster 1 is carried out from the press machine to the bolster mounting table 14, and the insertion / removal position determination means 43 is designated with a new arrangement pattern. The insertion / removal position determination means 43 fetches and compares the immediately preceding array pattern with the new array pattern from the memory 42,
The pin hole position for extracting the cushion pin 17 from the bolster 1 and the storage box 18 and the pin hole position for newly inserting are determined.

When the start switch is actuated, the sequence control means 49 first causes the cushion pin pushing device 15 to move.
Is operated to make the entire cushion pin 17 of the bolster 1 project so as to be graspable. Running base 20, 2
0a is moved to a predetermined position of the bolster 1, then the support rod 22 is advanced and retracted to the first row, the elevating bases 21 and 21a are lowered, and the gripping device 23 at the position to be removed is operated. Then, the elevating bases 21 and 21a are raised to completely pull out the cushion pin 17 from the pin hole 10 for traveling.

The traveling bases 20 and 20a are moved along the rails 19 and stopped at predetermined positions in the storage box 18. The support rod 22 is moved back and forth to the first row to move up and down the bases 21 and 21a.
Is released to be released into the pin hole 18a, and the gripping device 23 of the cushion pin 17 to be newly inserted is operated to be gripped, and is raised to be pulled out from the storage box 18, and the pin hole of the first row of the bolster 1 is removed. It is transported to 10, lowered and inserted. Next, the gripping device 23 is moved up to move forward, the unnecessary cushion pins 17 in the second row are taken and moved to the storage box 18, moved forward to the pin hole 18a in the second row and returned, and the necessary cushion pins 17 are also returned. The bolster 1 is taken out, moved to a predetermined position of the bolster 1, and further inserted into the pin hole 10 of the second row.

Thereafter, similarly, the cushion pin 17 is inserted and removed by reciprocating between the bolster 1 and the storage box 18.
After the insertion / removal of all the rows is completed, the gripping devices 23 move forward / ascend for each row in the bolster 1 and descend in each row to operate all the gripping devices 23, and the touch sensor 25b.
To detect the presence or absence of the cushion pin 17. As a result, the actual array pattern is detected, it is compared with the regular array pattern to inspect whether the insertion / removal position has an error, and the inspection result is displayed on the display device 48. Similarly, the storage box 18 is moved to detect the presence or absence of the cushion pins 17 in each row, the actual arrangement pattern is compared with the regular inverted arrangement pattern, the remaining state is inspected, and the result is displayed.

With the cushion pin 17 newly installed without any mistake, the cushion pin pushing device 15 is retracted so that the head 17a of the cushion pin 17 is supported in the receiving groove 11 and is carried into the press machine. At that time, the cushion pin 17 is reliably supported from below and does not slide down.

The circuit portion constituting each of the above-mentioned means can be constructed by using a CPU as shown in FIG. 6, for example. That is, the CPU 55 has the above-mentioned means 4
0, 41, 43 to 47, 49, and RA including a work area in which ROM 56 stores a plurality of types of arrangement patterns of cushion pins 17 and a program for operating the programs.
M57 and the like are attached, and signals are exchanged with the position sensors 19a and 19b, the touch sensor 25b, the display device 48, the push-out control means 16, the travel control means 40, and the grip control means 45 through the interface section 58, and further drive for raising and lowering and advancing and retracting. The encoder signal attached to the device is input and the control signal is output. As a result, the operation according to the flowchart of FIG. 5 is performed, the newly set array pattern is compared with the immediately previous array pattern to determine the insertion / removal position, the respective parts are sequence-controlled, and after the insertion / removal work is completed, the pin hole 10 of the bolster 1 is completed. Also, the pin hole 18a of the cushion pin storage box 18 is inspected and the inspection result is displayed. In the case of NG, the cushion pin can be easily corrected by hand in the protruding state.

In the above embodiment, when it is desired to reduce the width of the storage box 18 in the rail crossing direction, the support rod 22 is used.
The upper end of each gripping device 23 is attached to the cushion pin storage box 18
It may be possible to attach an actuator for controlling the position in the rail crossing direction corresponding to the pin hole position. As the gripping device 23, an electromagnet other than the above-mentioned two-pronged type is used, and another system such as attaching a pressure-sensitive sensor for confirming suction of the cushion pin at the time of inspection can be considered. Gripping device 2
3 can be arranged in a plurality of rows on the support rod 22 to reduce the number of reciprocating motions between the bolster 1 and the storage box 18.

[0022]

As described above, according to the present invention, since the cushion pin is supported by the head having an enlarged outer diameter in the receiving groove of the pin hole of the bolster, the cushion pin does not come off during the movement of the bolster and can be securely mounted. It will be possible. Further, since the cushion pins are automatically mounted in the protruding state from the bolster surface, the arrangement state can be visually checked, the damage and the like can be easily confirmed, and the correspondence can be easily performed externally. By using the gripping device, it becomes possible to easily and surely inspect the mounting state of the cushion pin.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a cushion pin automatic mounting device of a press machine according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a traveling cushion pin gripping device to which a control unit of the same device is attached.

FIG. 3 is a side view showing a part of a cushion pin pushing device and a gripping device of the same device.

FIG. 4 is a diagram illustrating an operation of the display device of the same device.

FIG. 5 is a flowchart illustrating an operation of the apparatus.

FIG. 6 is a diagram showing a circuit configuration in which a control unit of the apparatus is implemented by a CPU.

7A and 7B show a prior art on which the present invention is based; FIG. 7A is a front view of a schematic configuration of a press machine, FIG. 7B is a perspective view of a work, and FIG. 7C is a structure of a cushion pin and a receiving hole. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bolster 10, 18a Pin hole 14 Bolster mounting table 15 Cushion pin pushing device 17 Cushion pin 17a Head 18 Storage box 19 Rails 19a, 19b Position sensor 20, 20a Running base 21, 21a Elevating base 22 Support rod 23 Grasping device 25b Touch sensor

Claims (2)

[Claims] 1. A lower mold cushion pin, which is slidably guided up and down by the lower mold base, is driven upward from a bolster so that a punch ring located around the punch body mounted on the lower mold base is moved upward. For this reason, there is provided a cushion pin automatic mounting device of a press machine for automatically mounting the cushion pins in the pin holes arranged in a lattice on the bolster according to the type of the punch ring. Heads each having an enlarged outer diameter and being supported from below are formed at the upper end portions, and ring-shaped receiving grooves for receiving the heads are formed at the upper end portions of the pin holes of the bolster, respectively. A cushion inserted in the pin hole is provided below the bolster table placed at the position so that the cushion pin projects from the upper surface of the bolster. A cushion pin pushing device that is pressed from one side, a storage box arranged along a rail laid between the cushion pin pushing device and a cushion pin storing pin hole corresponding to the lattice, and A traveling base that includes a traveling cushion pin gripping device that travels along a rail, and the traveling cushion pin gripping device includes a traveling drive device for automatically traveling between the cushion pin pushing device and the storage box. And an elevating and lowering base which is guided by the traveling base so as to be able to ascend and descend and which is provided with an elevating and lowering drive device for automatically elevating and lowering, and an elevating and retracting guide which is guided by the elevating and lowering base so as to be capable of advancing and retreating in the rail direction and which is forward and backward At least one of the rails transverse to the rail is provided with a support rod equipped with a drive.
A memory for storing the arrangement pattern of the cushion pins of a plurality of types assumed in the bolster, the memory being configured by a group of gripping devices arranged below the pin holes in a row and gripping the upper ends of the associated cushion pins. By comparing the arrangement pattern that was just read out from this memory with the newly designated arrangement pattern, the pin hole position for extracting the cushion pin from the bolster and the newly inserted pin hole position are determined. By inserting and removing the insertion position determination means, the cushion pin is projected from the upper surface of the bolster, and the traveling base is moved to the bolster delivery position and the storage box according to the determination result of the insertion and removal position determination means. Of the pin hole row to be inserted and removed at the predetermined position. A cushion pin automatic mounting device for a press machine, further comprising a control unit for lowering the cushion pin from a traveling position to grip or release the cushion pin. 2. A sensor for detecting gripping of a cushion pin is attached to each gripping device, and detection signals of these sensors are fetched to create actual cushion pin array pattern data. 2. The cushion pin automatic mounting device for a press machine according to claim 1, further comprising an inspection means for judging whether or not the mounting position of the cushion pin on the bolster is good in comparison with a designated arrangement pattern.