JP3081659B2 - Punch press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press such as a turret punch press.

[0002]

2. Description of the Related Art In a punch press, for example, a turret punch press, a large number of mold mounting stations are provided on a turret, an arbitrary mold (punch and die) is mounted on an arbitrary station, and then the turret is rotated and the Index the mold mounting station just below the ram (striker)
Predetermined punching is performed with an indexing die.

[0003] The die used for this kind of punching wears as the number of uses increases. Therefore, each mold must be polished according to the amount of wear. The standard polishing time is about 400 times for a very thick plate and about 50,000 times for a thin plate. The amount of polishing is about 0.2 to 0.4 mm per polishing.

Conventionally, when a mold is worn, the mold is polished, and in order to compensate the amount of mold height in accordance with the amount of polishing, a screw is adjusted or a punch shim or a die shim is used. The screw adjustment is performed for a punch having a relatively small diameter, and the distance between the punch head and the punch body is adjusted by rotating a screw interposed therebetween. Further, since the height adjustment by the punch shim is performed for a punch having a relatively large diameter, a thin plate of 0.4 to 2.4 mm called a punch shim is interposed between a punch chip and a punch driver constituting a punch body. , The punch height is adjusted in units of 0.4 mm. The die shim is a thin plate interposed between the die holder and the die. Generally, six types of 0.4 to 2.4 are prepared.

[0005]

However, in the above-described mold height adjustment method, the height change due to polishing is intended to be adjusted only on the mold side irrespective of the punch press machine main body. Processing is very difficult and time-consuming, and adjustment by shim requires 0.4mm
There was a problem that only the unit could be adjusted.

[0006] Incidentally, since the punch is assembled as an assembly (punch assembly) through adjustment of the height of the mold via a spring and assembly, it is necessary to disassemble the assembly in order to interpose the shim. Become.

On the other hand, in recent punch presses, low vibration,
For the purpose of low noise, the cylinder drive system that can freely adjust the ram drive device from the conventional crank press is becoming the mainstream. In this type of cylinder drive punch press machine, the ram stroke amount can be adjusted by the NC device Has become.

Therefore, if the conventional mold height adjustment using shims or the like can be replaced with adjustment of the cylinder drive amount via appropriate means, a part of the conventional mold height adjustment can be omitted.

[0009]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the invention according to claim 1 includes a punch holder that supports a plurality of punches and supports a plurality of dies corresponding to each of the punches. A punch press machine comprising: a die holder; and a stroke of a ram capable of pressing each of the punches, the die height information storage unit storing a die height of each of the punches; and a punch holder. A mounting die list storage unit storing a mounting die list in which a die identification name is associated with a die mounting station name of each punch, a mounting die list stored in the mounting die list storage unit, and A mold height information retrieving unit for retrieving a mold height for a used punch based on the mold height of each punch stored in the mold height information storage unit; A ram drive amount adjustment setting unit that sets the stroke of the ram according to the mold height searched by the unit; and a ram drive unit that drives the ram with the stroke set by the ram drive amount adjustment setting unit. Configuration.

According to a second aspect of the present invention, there is provided a ram having a punch holder for supporting a plurality of punches, a die holder for supporting a plurality of dies corresponding to the punches, and a pressable ram for each of the punches. In a punch press machine having a stroke adjustable, a mold height information storage unit storing the mold height of each punch, and a mold identification name corresponding to a mold mounting station name of each punch in a punch holder. A mounting die list storage unit that stores the mounted mounting die list, and a ram drive amount adjustment list storage unit that stores a ram drive amount adjustment amount corresponding to each punch stored in the die height information storage unit. The punch used based on the mounting die list stored in the mounting die list storage unit and the ram driving amount adjustment amount of each punch stored in the ram driving amount adjustment list storage unit. An adjustment amount search unit for searching for an adjustment amount, a ram drive amount adjustment setting unit for setting a ram stroke according to the adjustment amount searched for by the adjustment amount search unit, and a ram drive amount adjustment setting unit And a ram drive unit that drives the ram with a given stroke.

[0011]

FIG. 1 is a front view of a turret punch press shown as an example of a punch press.

In the figure, a turret punch press 1
Has a so-called bridge-shaped frame 2,
A ram 3 which is driven upward and downward by hydraulic pressure by a cylinder device is provided above the center of the frame 2. The ram 3 is configured so that the die contact portion (strike) at the lower end thereof can be repositioned left and right in the figure. This is to cope with a change in the track position of the punch located below. The ram 3 is moved up and down at a desired speed and a desired stroke through a high-precision hydraulic servo valve by the operation of the cylinder device, and presses a punch head located below the ram 3.

On one side of the frame 2, turrets 4 and 5, which are synchronously rotated as a pair up and down, are rotatably supported in a horizontal plane. Generally, an upper turret 4 as a punch holder is for mounting a punch, and a lower turret 5 as a die holder is for mounting a die. As shown in FIG. 2, three tracks, five tracks,
A mold mounting station of size 56 stations is provided. In each mold mounting station S (ij), an arbitrary mold can be mounted for a plurality of dies of a certain size among the five sizes. i (1-3) indicates a track number, and j (1-56) indicates a station number.

Referring again to FIG. 1, a work clamp device 6 is provided on the other side inside the frame 2 so as to face the turrets 4 and 5. The work clamp device 6 is supported by a carriage base 7 that moves in the left-right direction (Y direction) in the figure, and is movable with respect to the carriage base 7 in the front-rear direction (X direction) orthogonal to the Y direction. is there. A pair of work clamp devices 6 are arranged in front and back, one end of the work W is fixed by its tip jaw, the other end of the work W is inserted between the turrets 4 and 5, and the arbitrary plane position of the work W is set to the ram. 3 can be located directly below the striker. At this time, the turrets 4 and 5 are rotated, and a predetermined station (die) is indexed immediately below the striker. The movement pattern of the work W is to start moving after the end of punching, accelerate, decelerate, decelerate, and stop and punch.

In the turret punch press having the above-described configuration, when an arbitrary die is mounted on the die mounting station S (ij) shown in FIG. 2 and the NC program is executed, N
The turrets 4 and 5 are rotated in order to perform a predetermined punching process using a mold (actually, a station) specified on the C program, and the work W is formed using a mold indexed immediately below the striker.
Predetermined punching is performed at an arbitrary position. At this time, the descending speed of the ram 3 is adjusted by the NC device so that the punching with low vibration and low noise can be performed.

FIG. 3 and FIG. 4 are cross-sectional views showing dies mounted on the turrets 4 and 5. 3 shows an example of a relatively small diameter 1 (１) inch size, and FIG.
This is an example of a (1/2) inch size.

In FIG. 3, a punch 8 is a punch body 9
Are housed in a guide 10 to form a compact punch assembly. The punch body 9 is formed such that the upper side has a small diameter and the lower side has a large diameter with the middle part as a boundary.
1 is inserted, and a relatively strong stripping spring 14 is interposed between the retainer collar 11 and the punch head 12 screwed to the punch head. The stopper 13 forms an appropriate tapered surface with the punch head 12 and is closely adhered to the punch head 12 so as to prevent the punch head 12 from rotating with respect to the punch body 9. The guide 10 is fitted to the lower portion of the punch body 9 so as to be slidable up and down, and the upper end of the guide 10 is fixed to the lower end of the retainer collar 11 using a fixing screw as appropriate. The guide 10 is provided with a key groove 17 for vertically guiding a punch key 15 provided on the punch body 9 and a guide key 16 on the turret side.

On the other hand, the upper turret 4 accommodating the punch 8 has a hole in which the guide 10 can be mounted, and the guide key 16 is provided for mounting the guide 10 at a predetermined angle on a plane. Have been. Further, a lifter device for spring-supporting the flange portion of the retainer collar 11 is provided. This lifter device has an upper turret 4
The shoulder screw 18 vertically supported inside is spring-supported by a lifter spring 20 via a lift ring 19, and the upper end of the lift ring 19 supports the retainer collar 11. The strength of the lifter spring 20 is naturally made weaker than that of the stripping spring 14.

In the above punch structure, the upper turret 4
The punch 8 is mounted on the ram 3 and the punch head 12 is
, The lift ring 19 first sinks due to the pressurization of the ram 3, and the lower end of the guide 10 contacts the work W.
When the punch head 12 is further processed, the stripping spring 14 bends, and the blade portion of the punch body 9 protrudes from the lower surface of the guide, and the die 21 located thereunder.
The workpiece W is cut between these steps.

The die 21 is attached to the lower turret 5 by the die holder 2.
2 is attached. The die dispenser 23 is for fixing the die 21 on the die holder 22. Reference symbol SPH is a shot pin fitting hole for turret positioning.

Polishing of the punch 8 and conventional height adjustment are performed as follows. First, remove the guide 10 fixed to the retainer collar 11 from the punch body 9,
As shown in FIG. 5, the blade is polished by about 0.2 mm.
Next, the mold height HP changed by polishing (see FIG. 5)
In order to compensate for this, two bolts are set up through two screw holes provided in the punch head 12, and the stopper 13 is pushed at the tip thereof, and the stopper 13 is unlocked with respect to the punch head 12. Then, the punch head 12 is rotated with respect to the punch body 9, and the punch height HP determined by the distance between the punch blade portion and the punch head 12 is adjusted. After the height adjustment, the two bolts set on the punch head 12 are loosened and locked by the stopper 13. On the other hand, die 2
In the polishing of No. 1, the die and the die holder 22 are changed according to the amount of polishing.
And a die shim in units of 0.4 mm. These are the conventional height adjustment methods for small diameter dies.

Next, in FIG. 4, a punch 24 having a relatively large diameter has a punch body divided into a bunch driver 25 and a punch tip 26, and a stripper plate 28 is fixed to a lower end of a guide 27 with screws 29. ing. The bolt 30 is for fixing the punch chip 26 to the punch driver 25. Reference numeral 31 indicates a punch shim.
Reference numeral 32 denotes an oil hole.

In polishing such a large-diameter punch, first, the screw 29 is removed to remove the stripper plate 28, and then the bolt 30 is loosened to remove the punch chip 26 from the punch driver 25 as shown in FIG. After the polishing, the assembly is performed again with a punch shim 31 interposed therebetween for compensating the polishing amount. This is the conventional height adjustment method for a relatively large diameter punch.

FIGS. 7 and 8 are explanatory views showing the mold height measuring means after polishing.

FIG. 7 relates to a digital caliper.
In this example, the caliper body 33 is provided with an electric conversion unit 34 capable of digitally outputting a measured value, and an IC card 35 for storing measurement information can be attached. Since the digital caliper 33 of this example is capable of mounting an IC card 35, the measured values are recorded in the IC card 35, and the IC card containing the recorded data is stored in an arbitrary place, for example, an NC device of a turret punch press machine or the like. The measurement data can be provided to a desired computer device by taking it to a host computer which controls the device and mounting it on an NC device or an IC card unit provided in the host computer.

FIG. 8 is an explanatory diagram showing a measurement method using the energization detection method. Below the rotatable whetstone 36,
A table BS that moves in a plane is provided. By fixing, for example, a die 21 as an object to be ground on the table BS, the upper surface thereof can be polished. The polished die 21 is brought into contact with a conductor 38 provided below the vertically moving means 37 which is driven up and down, and the vertically moving means 37 at the time of contact is provided.
The height of the die 21 is detected from the positional relationship described above. For this reason, the conductor 38 is supported by the vertical moving means 37 via a spring. The vertical position of the vertical movement means 37 is detected by a position detector 40 connected to the encoder 39. Further, a conduction state is provided between the conductor 39 and the vertical moving means 37, and an energization detector 41 for detecting an energized state between the vertical moving means 37 and the table BS is provided. When the vertical moving means 37 is lowered, the conductor 38 comes into contact with the die 21 and the energization detector 41 detects the energization state. Therefore, the reading of the movement amount detector 40 at this time, and the conductor 38 contacts the table BS similarly. The height of the die 21 is detected from the difference between the readings at this time. The detection data is similar to that of FIG.
It is provided to the NC device and the host computer.

FIG. 9 is a block diagram showing an example of a mold height information management system 42 applied to a turret punch press. This system 42 is formed in an NC device 43 for numerically controlling the turret punch press 1. The intelligent data terminal 45 connected to the NC unit 44 which is a main part of the NC device 43 is a terminal for performing data communication with a host computer (not shown).

The NC unit 44 is used to drive and control each actuator of the turret punch press 1.
The station indexing unit 46, the ram driving unit 47, and the work clamping device driving unit 48 are connected. The station indexing section 46 is provided with a die code (T
In this case, the station numbers on the turrets 4 and 5 are recognized in accordance with the code (3), and the turrets 4 and 5 are rotated so that a predetermined mold is located immediately below the ram 3.

The work clamp device driving section 48 controls the servo positioning of each axis (XY) for moving the work clamp device 6 in order to punch a work W at a predetermined position. The ram drive unit 47 determines the movement pattern of the ram 3 so as to press the punch head with the ram 3 in order to punch the predetermined position of the positioned work, and moves the ram 3 down and down according to the stroke of the determined pattern. This is for controlling the rise.

The ram 3 is driven by a cylinder device (not shown), and the cylinder device is hydraulically driven by a hydraulic circuit (not shown). The hydraulic circuit is provided with a hydraulic servo valve for controlling the ram 3 at high speed and with high accuracy. I have.

Further, in the NC device 43 of this embodiment, a mold height information search section 49 is connected to the station indexing section 46, which includes a mold height information storage section 50 and a mounted mold list storage section. A ram drive amount adjustment setting unit 52 which is also connected to the ram drive unit 47 is connected. The mounting die list storage unit 51 includes a die identification information input unit 53.
Is connected.

The mold identification information input section 53 is provided with a punch 8
Alternatively, a die identification code read from the die identification information attached to the die 21, for example, a bar code, is read at the time of die replacement. The mounting die list storage unit 51 creates and stores a mounting die list in which a die mounting station name is associated with a die identification name in accordance with die identification information at the time of die replacement.

The mold height information storage unit 50 stores the mold heights HP and HD of the punch 8 or the die 21 by manual input of the IC card 35 or the keyboard. FIG. 11 shows the contents stored in the mold height information storage unit 50. As shown in FIG.
The height, the polishing history, and the number of punches corresponding to the identification name are stored for the die 21 and the identification name. The number of punches is cleared each time polishing is performed. The ram drive amount adjustment setting unit 52 adjusts the punch stroke according to the mold height of the currently used mold.

With the configuration of the NC device 43, the mold height information search unit 49 searches the mold height HP for the currently used punch mounted on the indexing station,
By providing this to the ram drive amount adjustment setting unit 52, the stroke of the ram 3 can be controlled according to the mold height HP. Specifically, when the punch height HP is shorter than the reference height by 0.5 mm, the stroke of the ram 3 can be increased by 0.5 mm. Thus, even if the mold height HP changes, the mold projecting position becomes the same in absolute coordinates. Moreover, in the stroke control of the ram 3 by the cylinder device, the ram 3 always comes into contact with the punch 8 from above, away from the punch 8, and does not extrude the punch 8 downward, but continues processing with the same punch. Is a method in which a predetermined up and down operation is repeated while the ram 3 is kept in contact with the punch 8, so that the stroke length does not change by the height change amount, nor does the processing tact increase.

FIG. 10 is a flowchart showing a mold height management method in the system 42 shown in FIG. In order, in step 1001, a mold height measurement value is input to the NC device 43, a list is made for the mold in step 1002, and a mounting mold list is generated in step 1003. Step 10
At step 05, the mold height of the working mold corresponding to the operation of the NC unit 44 is searched, the ram drive amount is adjusted and set at step 1006, and machining is performed at step 1007.

In the above embodiment, only the adjustment of the punch height is automatically performed, and the die height is adjusted by using the die shim as in the conventional case. However, the present invention is applied to a turret punch press machine 1 of a cylinder drive system. When the turret punch press is provided with a function of adjusting the height of the die 21, the die height may be automatically adjusted. Further, even in the case of a crank press or the like in which the punch height cannot be adjusted, the punch height HP and the die height HD can be managed by the mold height information storage unit 50. It can be used for detection of In the above embodiment, the search timing of the mold height information is set for each punch operation. However, the search is performed for each input of the NC program and the schedule program, and the adjustment amount of the ram drive amount is listed, and the punch operation is performed. May be made to search this list.

The embodiment shown in FIG. 12 is different from the embodiment shown in FIG. 9 in that an all-die height information storage unit 50 is connected to a host computer 54 connected to the IDT 45, and the host computer 54 corresponds to each die. The ram drive amount adjustment amounts are calculated, and the calculated amounts are transferred to the ram drive amount adjustment list storage unit 56 of the NC device 55 via the IDT 45. For this purpose, the NC unit 55 is provided with an adjustment amount search unit 57 instead of the mold height information search unit 49. The host computer 54 is connected to other devices 58 such as a general automatic programming device and an NC device for controlling another turret punch press.

With the configuration shown in FIG. 12, the host computer 54 can set the adjustment amount for each mold with respect to the change in the mold height in accordance with the NC program created by the automatic programming device, and controls each turret punch press machine. Ram drive amount adjustment list storage unit 56 of the NC device to perform
And the entire line can be managed by the host computer, so that it is not necessary for each NC device to have mold height information on all molds. FIG.
Since the information as shown in FIG. 1 can be used by the host computer 54, the information can be utilized in many aspects, such as the mold polishing time can be appropriately instructed in accordance with the processing schedule.

FIG. 13 is a flowchart showing a mold height management system in the system of FIG. Step 1
In 301, the mold height measurement value is input to the host computer 54, and in step 1302, the height measurement value input is stored in the total mold height information storage unit 50, and in step 1
At 303, a call from the host computer 54 or another device or the like is determined, and at step 1304, required information on a required mold can be transferred to the called device.

The present invention is not limited to the above-described embodiment, but can be implemented in an appropriate mode by making appropriate design changes.

[0041]

As will be understood from the above description of the embodiment, the present invention includes a mold height information storage section 50 storing the mold height of each punch 8 supported by the punch holder. A configuration in which the stroke of the ram 3 is set in the ram drive amount adjustment setting unit 52 according to the die height of each punch stored in the die height information storage unit 50, and the ram 3 is driven with the set stroke. Therefore, after each punch 8 is polished again, the die height of each punch 8 is measured and stored in the die height information storage unit 50 without individually adjusting the height of each punch 8. By doing so, the stroke of the ram 3 is adjusted in accordance with the die height of each punch 8, and it is easy to respond to the height adjustment.

Therefore, there is no need to perform screw adjustment or shim adjustment, and these manual operations can be omitted.

[Brief description of the drawings]

FIG. 1 is a front view showing the outer shape of a turret punch press used for carrying out the present invention.

FIG. 2 is an explanatory plan view showing an arrangement of a turret mold mounting station of the turret punch press machine.

FIG. 3 is a cross-sectional view showing a structure for attaching a relatively small diameter punch and die to a turret.

FIG. 4 is a sectional view showing a relatively large-diameter punch structure.

FIG. 5 is an explanatory sectional view showing a state where a guide of the punch shown in FIG. 3 is removed.

FIG. 6 is an explanatory sectional view showing a detached state of the punch chip shown in FIG. 4;

FIG. 7 is a side view of a digital caliper with an IC card.

FIG. 8 is an explanatory view showing a mold height measuring method.

FIG. 9 is a block diagram showing a configuration of a die height information management system of the punch press according to one embodiment of the present invention.

FIG. 10 is a flowchart showing a mold management method of the system shown in FIG. 9;

FIG. 11 is an explanatory diagram showing storage contents of a mold height information storage unit.

FIG. 12 is a block diagram showing a configuration of a mold height information management system of a punch press according to another embodiment of the present invention.

FIG. 13 is a flowchart showing a mold height management method of the system of FIG. 12;

[Explanation of symbols]

 44, 55 NC unit 44 NC unit 45 Intelligent data terminal 46 Station indexing unit 47 Ram drive unit 49 Mold height information search unit 50 Mold height information storage unit 51 Mounting mold list storage unit 52 Ram drive amount adjustment setting Unit 54 Host computer 56 Ram drive amount adjustment list storage unit

──────────────────────────────────────────────────の Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 28/36 B30B 15/14 B30B 15/16 B30B 15/18 B21D 37/14

Claims (2)

(57) [Claims] 1. A punch holder (4) supporting a plurality of punches (8), a die holder (5) supporting a plurality of dies (21) corresponding to the punches (8), and A ram (3) capable of freely pressing each punch (8)
In a punch press machine configured so that the stroke of the punch can be adjusted, a mold height information storage unit (50) storing the mold height (HP) of each punch (8), and each punch in the punch holder (4). (8) A mounting die list storage unit (51) storing a mounting die list in which a die identification name is associated with a die mounting station name, and stored in the mounting die list storage unit (51). The mounting die list and each punch (8) stored in the die height information storage unit (50)
A mold height information search unit (49) for searching for a mold height (HP) for a punch to be used based on the mold height (HP) of the mold and a mold searched by the mold height information search unit (49). Ram drive amount adjustment setting unit (52) for setting the stroke of the ram (3) according to the mold height (HP)
And a ram drive section (47) for driving the ram (3) with a stroke set by the ram drive amount adjustment setting section (52). 2. A punch holder (4) supporting a plurality of punches (8), a die holder (5) supporting a plurality of dies (21) corresponding to the punches (8), and A ram (3) capable of freely pressing each punch (8)
In a punch press machine configured so that the stroke of the punch can be adjusted, a mold height information storage unit (50) storing the mold height (HP) of each punch (8), and each punch in the punch holder (4). (8) A mounting die list storage unit (51) storing a mounting die list in which a die identification name is associated with a die mounting station name, and a die height information storage unit (50). A ram drive amount adjustment list storage unit (56) storing a ram drive amount adjustment amount corresponding to each punch (8); a mounting die list stored in the mounting die list storage unit (51); An adjustment amount search unit (57) for searching for an adjustment amount for the used punch based on the ram drive amount adjustment amount of each punch (8) stored in the amount adjustment list storage unit (56); 57)
A ram drive amount adjustment setting section (52) for setting the stroke of the ram (3) in accordance with the adjustment amount retrieved by the ram (3); and the ram (3) with the stroke set by the ram drive amount adjustment setting section (52). And a ram drive unit (47) for driving the punch press.