JPH04220122A - Guide key simulation device of punch press - Google Patents

Abstract

PURPOSE:To appropriately know the die or key exchanging time by simulating the advent of the life of die guide key on the punch press. CONSTITUTION:The guide key simulation device reporting the advent of life in execution of the working program composed by obtaining the accumulated value of the die opening numbers against the working program to be worked, setting the accumulation arithmetic part 54, 55 to compare the obtained accumulated value with the pre-set life number.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention makes it possible to input the processing schedule to be performed and use simulation to predict the expiration of the life of the guide key of a punch press, thereby making it possible to efficiently replace the key before the end of its life. The present invention relates to a guide key simulation device for a punch press.

0002

[Prior Art] A punch press, for example, a turret punch press, has a large number of mold mounting stations on a turret, and any mold is mounted on any mold mounting station, and then a mold specified by an NC program is produced. A predetermined process is performed using a predetermined mold while indexing the mold station to a predetermined processing position.

Here, each mold is attached to each station in relation to a guide key and a keyway.

[0004] Furthermore, the mold attached to each station has a guide member for holding the plate on its outer periphery, and its rotation is regulated by the relationship with the guide key and keyway, and the punch body slides inside it. Stored in a movable manner.

[0005] A relatively weak spring that biases the guide member upward is interposed between the turret and the guide member, and a spring with a relatively weak force is interposed between the guide member and the punch body. is interposed with a relatively strong spring that biases the punch body upward, and when the punch head is struck with a striker, the guide member first descends together with the punch body to press the plate and guide it with a stronger force. The lower end of the punch body protrudes from the tip of the member, and the plate located below is punched out.

Therefore, in the mold structure as described above, the guide key provided between the turret and the mold and the guide key provided between the guide member and the punch body are arranged in the key groove. Each reciprocating sliding operation is performed once, and the guide key is worn out accordingly.

[0007] As described above, when the guide key wears out and the degree of wear increases, problems as shown in FIGS. 10 to 12 occur.

FIG. 10 shows an example in which when the work W is broken, the boundary line 3 between the bright surface 1 and the broken surface 2 is no longer parallel, resulting in poor finishing accuracy.

FIG. 11 shows a state in which the respective mold positions 4-1, 4-2, and 4-3 are no longer parallel in the so-called punching process, and the cut surface of the workpiece W becomes serrated.

FIG. 12 shows an example in which the edge portion 6 of the mold blade portion 5 wears out faster than usual and becomes rounded.

[0011] Conventionally, in order to prevent the guide keys from being worn out, which deteriorates the finishing accuracy, and to prevent the mold blade from being worn out quickly, the operator estimates that the guide keys are likely to have worn out. However, the guide key is replaced when a phenomenon such as that shown in FIGS. 10 to 12 occurs or is about to occur by referring to actual machining results.

0012

[Problem to be Solved by the Invention] However, the conventional mold guide key replacement method as described above was based on the operator's intuition based on the actual machining process, so the replacement timing was not always appropriate. , too early or too late, resulting in poor product finishing accuracy and rapid mold wear.

[0013] In addition, in recent years, there has been a tendency for punch press machines to be incorporated into systemized lines like other machines, and each machine on the line is operated on a schedule, so it is difficult to know which station of which punch press , or it is becoming more difficult to appropriately determine when to replace the guide key for which mold.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a punch press guide key simulation device that can appropriately notify and instruct when to replace the guide key of a punch press under the above-mentioned environment. It is.

[0015]

[Means for Solving the Problems] In order to solve the above problems, the present invention has constructed a guide key simulation device for a punch press as set forth in the claims.

[0016]

[Operation] In the punch press guide key simulation device of the present invention, when the mold or the station on which the mold is mounted is provided with a sliding member that slides against each other in relation to the guide key and the keyway, the processing Performing a planned simulation, assuming that the guide key operates once for each punch of the mold, calculates the number of operations, and compares the cumulative value of the number of operations with a preset lifetime number, Appropriate notification will be made to ensure that the number of lifetimes is not exceeded. As a notification method, there is a method of displaying the ratio of the number of actuations of each guide key to the number of lifetimes in descending order.

Regarding scheduled operation, it is also possible to determine a job whose number of operations is equal to the number of lifetimes.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 2, a turret punch press 7 shown as an example of a punch press has a frame 8 having a so-called bridge structure, and upper and lower turrets 9 and 10 are provided within this frame 8.

The upper and lower turrets 9 and 10 are rotatable in a horizontal plane around an axis 11, and as shown in an enlarged plan view in FIG.
(i=1, 2...21).

The molds mounted on each mold mounting station Si are indexed directly below the ram (striker) 12, and by pressing down the mold head as the ram 12 descends, both turrets 9, 10 A predetermined process is performed on the work W guided between the two. The work W is held by the clamp device 13 and guided on the table 14. FIG. 4 is a longitudinal sectional view showing details of the punch 15 and die 16 attached to the upper turret 9 and lower turret 10, respectively.

In the figure, punch (punch assy) 15
The guide member (sleeve) 17 is fitted into a punch insertion hole provided in the upper turret 9, and the punch body 18 is fitted inside the guide member (sleeve) so as to be vertically slidable.

Guide grooves 19 are cut in the upper and lower sides of the guide member 17, and a key (turret key) 20 provided on the turret 9 side is fitted into this groove 19. Also, guide member 1
A flange portion 17F is formed at the upper part of the shoulder screw 21b of the shoulder screw 21b, which is biased upward by a lifter spring 21a.
It is placed on c.

Therefore, the flange portion 1 of the guide member 17
By pushing down 7F against the lifter spring 21a, the lower surface of the guide member 17 is aligned with both turrets 9,
It is possible to push down the guide member 17 until it comes into contact with the upper surface of the workpiece interposed between the guide members 10 and 10. At this time, the guide groove 19 of the guide member 17 is connected to the turret key 2.
0, causing some wear on the turret key 20.

On the other hand, the flange portion 1 of the guide member 17
A retainer collar 22 is arranged on the upper surface of 7F. Further, a punch head 23 is provided at the upper end of the punch body 18, and between the punch head 23 and the retainer collar 22 there is a spring that biases the punch body 18 upward with a force stronger than the lifter spring 21a. A ripping spring 24 is provided. The punch body 18 is provided with a guide key (mold key) 25 for the guide groove 19.

Therefore, by applying force to the punch head 23 with the striker 12, the lower end of the guide member 17 is brought into contact with the workpiece W against the lifter spring 21a, thereby fixing the workpiece. Next, by pushing the punch head 23 further downward against the stripping spring 24, the lower end blade portion of the punch body 18 that is protruded from below the guide member 17 is protruded from the die 16. The workpiece W can be punched between the dies. punch 1
5 has the above-described configuration, the turret key 20 as a mold guide key and the mold key 25 are slid against the guide groove 19 by the punching operation, and are worn out accordingly.

As shown in FIG. 5, the control device (NC device) that controls the turret punch press 7 includes a system bus 26 including a CPU 27, a ROM 28, a RAM 29 whose power is backed up by a battery Bat, a digital input (Di) 30, Digital output (Do) 31
, programmable controller (PC) 32, bidirectional R
AM (DP-RAM) 33, serial interface (
SIO) 34, 35, parallel interface (PIO)
) 36 etc. are connected.

Various actuators 38 and sensors 39 are connected to the Di 30 and the Do 31 via a connector module 37.

The PC 32 refers to the detection numbers of the sensors 22 and outputs control signals to the various actuators 38 under the operating system of the CPU 10. This control signal includes a signal for rotating the turrets 9 and 10.

The encoder E is connected to the DP-RAM 33 via a positioning module 40 and a servo amplifier 41.
and a servo motor Ms with a tachogenerator TG are connected. The servo motor Ms includes a two-dimensional servo motor that drives the clamp device 13 in a horizontal plane and a servo motor that rotationally drives the molds within the turrets 9 and 10.

A manual data input device (MDi) 44 equipped with a color CRT 43 and keys for data input such as a numeric keypad is connected to the serial interface 34 via a controller 42 .

A control panel 46 for performing various operations via a controller 45 is connected to the serial interface 35.

The parallel interface 36 has N
A paper tape reader (PTR) 47 for C tape input is connected. A non-volatile memory for storing the NC program is appropriately connected in parallel to the paper tape reader 47.

Furthermore, in this example, a serial interface 48 is added to the system bus 26 in order to operate the turret punch press 7 on a scheduled basis under the processing line.
An intelligent main controller (IMC) 50 for schedule editing is connected to this via an intelligent data terminal 49 as a line control device. A guide key simulation device 51 according to an embodiment of the present invention is integrated with this IMC 50.
is provided.

The IMC 50 is placed in the operating room, sets schedules by combining NC programs generated by an automatic programming device, and sets schedules for each ID.
This is to give a schedule execution command to T49.

To briefly explain the operation of the above control device, PT
The NC program read from the R47 or IDT49 stores information such as the designation of the mold device station number and the processing position at which a predetermined processing is to be performed with the mold installed at this station.

[0037] Therefore, the CPU 27 uses Di30, Do3
1. The PC 32 and DP-RAM 33 are operated under the operating system to rotate the turrets 9 and 10 shown in FIG. The striker 12 is lowered on the workpiece W, and a predetermined press working is performed using the indexing die.

FIG. 1 is a block diagram showing an example of the configuration of the guide key simulation device.

The guide key simulation device 51 includes:
A machining schedule input section 52 for inputting the following machining schedule set by the IMC 50, NCP001 10 sheets NCP002 20 sheets NCP003 30 sheets, and each NC program NCP001, 002, 003 from the machining schedule input from this input section 52 The job extraction unit 53 extracts a job corresponding to the job. As mentioned above, each NC program instructs which mold to punch at which position (X, Y) by associating the preparation code (G code) with the mold code (T code) as shown below. ing. However, the mold code T here represents the mold mounting station number.

G...X...Y...T...A turret key operation number cumulative calculation unit 54 and a mold key operation number cumulative calculation unit 55 are connected to the job extraction unit 53, and the turret key 2
0 and the number of operations of the mold key 25 are simulated. The mold key operation number cumulative calculation unit 55 includes:
A mold information storage section 56 that stores cumulative calculation contents for all molds held in the factory is connected to a mounted mold list storage section 57 that stores a list of mounted molds mounted on the turret 9. has been done. Mounting mold list storage section 57
is used to store a list of molds to be installed at the time of simulation. The installed mold list storage unit 57 is linked with a mold replacement instruction device (not shown), and stores the mold installation status for each job simulation.

[0041] Each of the cumulative calculation sections 54 and 55 is connected to a condition input section 58 using a keyboard or the like and a display section 59 such as a CRT.

FIG. 6 is a flowchart showing the simulation method of the cumulative calculation units 54 and 55.

In step 601, execution of a punch is simulated, and in step 602, the stored contents of the station Si are counted up.

nSi=nSi+1 Also, step 603
Also for the mold key, the count number nT of the relevant mold Tj
For j, count up as nTj=nTj+1.

In recent punch press machines, a position control system has been adopted in which the striker 12 is not operated at the maximum stroke, but is stopped at an intermediate position and moved up and down in small increments. Considering the distance, it is also possible to increment the count by "1" for a plurality of punch movements.

FIG. 7 is an explanatory diagram showing the stored contents of the cumulative result storage units 54M and 55M held by the cumulative calculation units 54 and 55.

In the figure, the cumulative result storage section 54M includes:
An integrated value of the number of times the turret key 20 is slid is stored. Further, the cumulative number of times storage unit 55M stores the cumulative number of times the mold key 25 is slid. The storage unit 54M stores the number of lifetimes N corresponding to each station number Si.
Si and the cumulative number ΣS(nSi) are stored. Furthermore, the storage unit 55M stores the number of lifetimes NTj and the cumulative number ΣT(nTj) corresponding to the mold identification name Tj.

The station numbers Si do not necessarily have to be serial numbers. Furthermore, the mold identification name can also be specified by the mold shape instead of the serial number. The number of lifetimes is a value entered in advance using a key.

The condition input section 58 can clear the cumulative number of times stored in the storage sections 54M and 55M to zero in response to replacement of the guide key 20 or 25.

FIG. 8 is a flowchart showing the cumulative calculation method of the cumulative calculation sections 54 and 55.

In step 801, each cumulative number ΣS, Σ
The ratio of T to the number of lifetimes is calculated as a percentage (%) using the following formula.

[0052]S%=(ΣS/NSi)×100T%=(
ΣT/NTj)×100 Next, in step 802, the names of the NC programs whose lifespan has expired are determined, and in step 803, the names of the NC programs with the largest percentage values are listed, and the display unit 59 is made to display as shown in FIG.

In FIG. 9, the screen 59a displays the contents of the schedule and the life expiration status of the turret key 20 and the mold key 25 under a display such as "Guide key life expiration status due to schedule execution". Displayed as a percentage value,
For keys whose lifespan has come to an end, an NC program name for a job whose lifespan has come to an end is written. It is also possible to display the NC program name as well as the number of sheets to be machined before the end of its life.

Therefore, the operator can easily and appropriately find out when to replace the turret key 20 or the mold key by referring to the display shown in FIG. For example, in the display of FIG. 9, turret key a
, b, and mold key f should be exchanged before executing the schedule, and turret key c and mold keys g and h should be exchanged after executing the schedule. . A warning color such as red or blue may be determined according to the percentage value, and the display may be colored.

By the way, when the life of the turret key shown in FIG. 9 has come to an end, it is not efficient to replace the key at each job during schedule execution. Therefore, when it is desired to execute the schedule continuously, it is also possible to change the mold mounting position so that the life does not expire while the schedule is being executed. Furthermore, if the mold key reaches the end of its life in the middle of the schedule, it can be replaced with a spare mold.

The display contents shown in FIG. 9 are printed out,
It can also be attached to the work form. Furthermore, it is also possible to create an optimal key exchange instruction by appropriately corresponding to this content with an expert system, and attach it to the work form.

As described above, in this example, it is possible to know the status of the end of the guide key's life from the display shown in FIG. 9 and to appropriately replace the mold, guide key, or station, thereby maximizing the life of the mold. It is possible to stretch the material and prevent processing defects.

The present invention is not limited to the above-mentioned embodiments, but can be implemented in any appropriate manner by making appropriate design changes.

[0059]

Effects of the Invention As described above, the present invention is a guide key simulation device for a punch press as set forth in the claims. If sliding members that mutually slide in relation are provided, perform a simulation of the machining schedule, and calculate the number of times the guide key operates once for each punch operation of the mold, The accumulated value of the number of operations is compared with the preset number of lifespans, the status of the end of life for the relevant machining schedule is determined, and the guide key replacement period can be appropriately notified and instructed so that the number of operations does not exceed the lifespan number. can.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a punch press guide key simulation device according to an embodiment of the present invention.

FIG. 2 is a front view of a turret punch press shown as an example of a punch press machine.

FIG. 3 is an enlarged plan view of the turret of the turret punch press.

FIG. 4 is an explanatory longitudinal cross-sectional view showing a mold structure mounted on the mold mounting station of the turret.

FIG. 5 is a block diagram of an NC device that controls the turret punch press.

FIG. 6 is a flowchart showing a number-of-times accumulation method performed by the accumulation calculation section of the guide key simulation device.

FIG. 7 is an explanatory diagram showing the storage contents of a storage section included in the cumulative calculation section.

FIG. 8 is a flowchart showing an accumulation calculation method of the accumulation calculation section.

FIG. 9 is an explanatory diagram of a display screen showing the state of the end of the Kaido key lifespan as the schedule is executed.

FIG. 10 is an explanatory diagram showing a state in which the guide key has been worn out and the broken surface has deteriorated.

FIG. 11 is an explanatory diagram showing a state in which the guide key is worn out and the overtaking result becomes sawtooth-like.

FIG. 12 is an explanatory diagram showing a state in which the guide key is worn out and the blade is rounded.

[Explanation of symbols]

15 Punch (punch assembly) 20 Turret key 25 Mold key 52 Machining schedule input section 53 Job extraction section 54 Turret key operation number cumulative calculation section 55 Mold key operation number cumulative calculation section 56 Mold information storage section 57 Installed mold list storage Section 58 Condition input section 59 Display section

Claims (2)

[Claims] 1. A guide key simulation device for a punch press, in which an arbitrary mold is mounted on a mold mounting station, and pressing is performed using the mold by pressing the mounted mold head. If the mold or the station on which the mold is mounted is equipped with a sliding member that slides against each other in relation to the guide key and the keyway, the movement of the mold per punch for the machining schedule to be performed. For each guide key, a means for accumulating the number of actuations is provided to obtain a cumulative value of the number of actuations, assuming that the guide key is actuated once, and compares the cumulative value of the number of actuations with a preset number of lifetimes for each guide key. A guide key simulation device for a punch press, characterized in that it is provided with cumulative calculation means for determining the end of life status of a punch press. 2. In claim 1, when the machining schedule is a machining schedule in which a plurality of jobs are consecutively arranged, the cumulative calculation means includes means for determining a job for which the cumulative value of the number of operations is equal to the number of lifetimes. A punch press guide key simulation device comprising: