JPS62102955A - Arrangement change processing device - Google Patents

Abstract

PURPOSE:To shorten the arrangement time by performing the arrangement change work for each station from the command time while automatically checking the type, number, cycle time, etc. of works invariably with the transfer of switches from the first station. CONSTITUTION:When an AND gate 15 is opened by an arrangement change command and a machine origin signal, an AND gate 16 is opened by a passing signal and a remaining work presence signal of the second station, the passing signal and a command of M30 are fed to an AND gate 18, and the number of remaining works is fed to an AND gate 20. Next, an AND gate 24 is opened by its output signal and an automatic-operation OFF signal, an arrangement change signal is generated and stored in a memory 27. Next, the number of NC programs stored in a memory 5 and types of works stored in a memory 6 are stored in a memory 25, the number of selected NC programs is stored in memories 32, 26, and furthermore types of works selected by a switch 13c are stored in memories 33 and 26. Next, signals from AND gates 28, 29 match to complete the operation with an arrangement change start signal of a memory 27.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention makes it possible to shorten work setup time in an FTL in which multiple NC machine tools, which are transfer machines, are connected by a conveyance line arranged in series. The present invention relates to a setup change processing device.

<Conventional technology> Conventionally, when machining multiple types of workpieces while changing setups on a serial conveyance line, the setup changeover process involves processing the next different type of workpiece after one type of workpiece has completely passed through all stations. A setup change is being made.

<Problems to be Solved by the Invention> However, the above-mentioned conventional setup changeover operation requires a very large amount of time and is a cause of a decrease in production efficiency. SUMMARY OF THE INVENTION An object of the present invention has been proposed in order to solve the problem in view of the above circumstances. To provide a setup change processing device which aims to shorten setup time by sequentially performing setup work at each station while automatically checking the program, the number of workpieces on a conveyance line, cycle time, and setup change status. It is in.

Means and Effects for Solving Problems> The present invention is a setup change processing device, and the specific means thereof is to arrange a plurality of NC machine tools in series, and to install a device in front of each NC machine tool. In the arranged transport path, each main operation panel has a setup switch, an NC program switch, and a work type switch for each NC machine tool, and the NC program switch on each main operation panel. Each NCC blockram memory stores manually entered NC programs, the work type memory stores the work type entered from the work type switch on each main operation panel, and the setup information received from the PC device in the previous process. Judgment means for judging whether there is a remaining workpiece at a station on the conveyance path based on a change start acceptance signal, and comparing the number of remaining workpieces and a preset value number of pieces when there is a remaining workpiece by the judgment means. When the number of remaining workpieces is less than the set value, the counter is activated, and if the judgment means indicates that there is no remaining workpiece number, the cycle time is compared with the internal setup timer and the cycle time is smaller than the internal setup timer. A setup start signal determining means outputs and stores a setup change start signal when time is up, and the setup change start signal from the setup start signal determiner determines the workpiece type and stage in the NC program of the previous process. It is comprised of a setup start signal determining means that compares the NC program of the process with the affected workpiece type and feeds a setup completion signal, which completes the setup change if they match, to the PC device of the previous process. By employing the setup change processing device of the present invention, setup change instructions and confirmation signals are automatically issued, so setup time can be significantly shortened compared to the conventional method. Furthermore, the operator's setup work is reduced and work efficiency is improved. This in turn leads to improved operating rates.

<Example> Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

(11) First, the basic principle of the present invention will be explained.

FIGS. 2(a) to 2(hl) are model diagrams illustrating the basic principle of the setup change processing apparatus of the present invention.

Each of (a) to (hl diagrams in Figure 2 is the workpiece conveyance line HL)
For example, the workstations above are 5 stations (1st station S+, 2nd station Sz,
3rd station Sz, 4th station S4, and 5th station Ss) are arranged in order from left to right.

FIG. 2 (aj indicates a state in which workpieces A are placed at each station from the 1st station S to the 5th station S5 and are being processed in order.

For example, the takt time at each station 81 to S is assumed to be T1 for ease of explanation. Therefore, Figure 2 (
When the takt time T in the state of al is elapsed, as shown in Fig. 2 (
As shown in (kl), (the A workpiece shifts to the right one station at a time. At the 1st7.cheese joint S1 in FIG.
A workpiece is processed from to the 5th station s5. However, the setup time for the setup work is within the takt time of the A work and the B work that is processed next to the A work. Also, the takt time of A work and B work is the same.

When the machining of the hole workpieces and the setup work for the B workpiece are completed in the state of Fig. 2 (bl), the l
Shift to the right one station at a time.

In Fig. 2 (C), each station from the 3rd station S3 to the 5th station S performs A-work machining, the 2nd station S2 performs setup work for B-work, and the 1st station S
At l, workpiece B is processed.

Next, move from Figure 2 (C1 to Figure 2 (dl), and then move to Figure 2 (dl).
4th station S4 and 5th station S.

Now, the machining of work A is done at 1st station SI and 2s.
At d station S2, the B workpiece is processed for an additional 3r.
At the d station S3, setup work for machining B is performed.

In FIG. 2 (el), workpiece A is processed at the 5th station SS, workpiece B is processed at the 1st station S to 3rd station S, and setup work for processing B is performed at the 4th station S4.

In FIG. 2 (fl), each station from the 1st station S1 to the 4th station S4 processes the B workpiece, and the 5th station prepares for the B workpiece.

In FIG. 2 Fgl, the B workpiece is processed at each station 81 to S, and from FIG.

In this way, the setup work of the present invention is not carried out after the machining of the A workpiece is completed at all stations, for example, but when the machining of the A workpiece is completed at each station, the setup work for the B workpiece is sequentially carried out by other stations. This is to be done while machining workpiece A or machining the next workpiece B at the station.

(2) The actual setup process will be explained based on the basic principle of the present invention explained in (11) above.

FIG. 3 is a plan view in which three NC machine tools are arranged in series and a conveyance line is arranged in front of them.

In FIG. 3, three NC machine tools, such as machining centers IO°Oa, 1QQb and 100C, are arranged in series. Each machining center 100a, 100b
and 100c are NC devices 10t-a and 101b, respectively.
, 101c and PC devices 102a, 102b, 1.02c
is connected.

In addition, each machining center 100a, tomb and 10
A work table 103a is provided in front of 0c.

103b and 103C are arranged. A transport path 104 of a work transport line is installed in front of each work table 103a, 103b, and 103C.

The conveyance path 104 is one for the machining center 100a.
st station 104a, machining center 100b
A 2nd station 104b is used for the machining center 100C, and a 3rd station 104C is used for the machining center 100C.

Before the feeding path 104, each machining center 100a,
100b and tooc main 1 mulberry work board 105a, IQ5
b and 105C are arranged. Main operation panel 105
A is a setup change switch SS1. A setup changeover operation is performed by switching SS2 and SS3 ON and OFF.

Further, the NC program is operated by selecting the NC program interval switches RSI, R52 and R33. Furthermore, the work type switch SW1. Each machining center 1 by selecting SW2 and SW3.
Workpieces to be machined are selected at 00a, 100b and 100C.

In Fig. 3, there is a B workpiece on the work table 103a of the machining center 100a, and the 1st station 1
B work is waiting at 04a.

Work table 103b of machining center 100b
There is an A work, and three A works are waiting at the 2nd station 104b. Furthermore, machining center 10
There is work A on the work table 103C of 0C.
Two A works are waiting at the 3rd station 104C.

These 1st station 104a, 2nd station 104b, 2nd station 104b and 3rd station
Ample space is provided on the conveyance path 104 between the stations 104c so that three or more workpieces can be placed on standby. Therefore, after determining the optimal number of waiting workpieces, it is necessary to detect whether there is a waiting workpiece in the front row in front of the work table of each station, or to install a mint switch Lsl and detect the last waiting workpiece at the rear. Set it up.

Machining center 100a and machining center 100b
Looking at the exchange of workpieces only in between, the PC device 102a sends a message to P to convey the B workpiece processed by the machining center 100a to the machining center 100b.
The B work setup data signal BDI is transmitted to the C device 1O2b. When the PC device 102b receives the 8-work setup data signal BD1, the data is transferred to the 2nd station 104b until the 93 remaining workpieces A-2, which are still waiting in the unprocessed 2nd station 104b, are processed. is 1s
The processed product B is not transported at the t station 104a. 93 A2 pieces of remaining work are machining center 1oOb
When the machining is completed, the setup change switch SS2 on the main operation panel 105b is turned on to perform setup change for work B.

Next, the PC device 102b sends a setup change completion signal, that is, the unloading OK signal BF2, to the PC device f102a, and the work type switch S W 2 is switched to B work, and the process is carried out from the 1st station 104a to the 2nd station 1.
Work B is transported to 04b. In this way, processing is performed between machining center 100b and machining center 100c and between other machining centers in the same manner as that between machining center 100a and machining center 100b.

(3) A specific configuration of the present invention will be explained.

FIG. 1 is a control block diagram showing the configuration of the present invention. In FIG. 1, the machine program data of the workpiece and the like are input and output from the CRT 2a and the keyboard 2b to the CPUI of the machining center 100a via the input/output circuit 2c. Setup change switch (SSl') 3a, NC program installation switch (R31) 3b, and work type switch (
SW1) 3C is connected via the interface 4, and ON/OFF of setup change processing, NC program corner, or work type is selectively set.

The NC program selected by the NC program fish switch (R3I) 3b is recorded in the NC program memory (PDMl) 5 via the interface 4.1.
will be contributed. The work type selected by the work type switch (SWl) 3c is stored in the work type memory (WDMI
)6.

NC program memory stored in the NC program memory (PDMI) 5 and work type memory (WDMI) 6
The type of work stored in is exchanged with the CPU II via the interface 7 using the B work setup data signal BDI and the setup change completion signal BF2. A rework carry-out command is output from the workpiece carry-out command register 8 via the interface 7 in response to a setup change completion signal BF2, which will be described later. CP of machining center 100b
Workpiece program data, etc. are input and output to the UII from the CRT 12a and the keyboard 12b via the input/output F512c. Machining center 100b (7) setup change switch (SS2) 13a.

The NC program switch (R32) 13b and the workpiece type switch (SW2) 13c are connected to the CPU II via the interface 14, and are used to selectively turn setup change processing on and off, and selectively set the NC program or workpiece type. be done.

When the AND gate 15 is opened by the setup change command and the machine origin signal, the signal passing through the gate and the work presence signal issued from the limit switch Lsl if there is a work remaining at the 2nd station 1O4b of the machining center 1oOb. The AND gate 16 is opened. If there is no remaining workpiece, the AND gate 17 is opened by the signal from the limit switch indicating no remaining workpiece and the signal passed through the AND gate 15. and gate 1
The signal passed through 6 and the M2O command are connected to AND gate 18.
The number of remaining workpieces CN (
! :Count up number with PN ΣCN = PN (CN: number of remaining works, PN: total number of waiting works) is OR gate 20
be taken in. Here, the total number of waiting workpieces PN is set in advance by the limit switch Ls2 in correspondence to the number of workpieces to be placed on standby on the conveyance path between each station. That is, the number of remaining works CN never becomes larger than the total number of waiting works PN.

Therefore, when there is a remaining workpiece, it is assumed that all the previous workpieces that were on the conveyance path between stations have been carried out from the setup station when the remaining workpiece count is increased by the M2O signal.

Next, the AND gate 17 is opened by the signal passing through the AND gate 15 and the signal indicating the absence of a workpiece issued by the mint switch Lsl for confirming the presence or absence of a remaining workpiece.

Here, in addition to the total number of standby works PN set on the transport path between stations, there is a margin (buffer) for placing remaining works, and there is a possibility that the remaining works may still be on the transport path.

Therefore, a one-talk timer (DT) 22 is set for the workpiece to pass through the setup station. That is, when the AND gate 21 is opened by the signal passed through the AND gate 17 and the signal from M2O, the AND gate 2 is opened.
A signal passing through 1 is taken into a waiting time timer (DT) 22. When the waiting time timer (DT) 22 times out, it is taken into the OR gate 20. When it is taken into the OR gate 20, its output signal and automatic operation OFF
This signal causes the AND gate 24 to open and a setup change start signal to be output.

The setup change start signal output from the AND gate 24 is temporarily stored in the setup change start memory 27.

The NC program level already stored in the NC program memory (PDMI) 5 of the machining center 100a and the work type stored in the work type memory (WDMI) 6 are transferred to the memory 25 and fertilized.

Further, the NCC block diagram selected from the NC program floor switch (R52) 13b via the interface 14 is written in the NC program memory (PDM2) 32 and stored in the memory 26. Further, the work type selected from the work type switch (SW2) 13c is stored in the work type memory (WDM2) 33 via the interface 14 and also in the memory 26.

As mentioned above, since the setup change start command is stored in the memory 27, the NC program level and workpiece type of the machining center 100a stored in the memory 25 are stored in the AND gate 28, and the machining center 100b is stored in the memory 26 as 41.
NCC blockrum and work type are AND gate 29
are incorporated into each. AND gates 28 and 29 are activated by the setup change start signal stored in the setup change start memory 27, respectively.
is opened, and the signals from ANDG) 28 and 29 are taken into the comparator 30. When the signal from the AND gate 28 and the signal from the AND gate 29 taken into the comparator 30 match, the setup change end signal BF2, that is, the machining start signal, is taken into the memory 31.

The setup change completion signal BF2 taken into the memory 31 is fed to the interface 7 of the machining center 100a and output as a workpiece unloading command, so that the workpiece is conveyed from the 1st station cutting path 104a to the 2nd station 104b. The NC program series recorded in the NC program memory (PDM2) 32 and the work type recorded in the work type memory (WDM2) 33 are transmitted to the machining center 100c via the interface 35, respectively. Feedback is also received from the machining center 100C to command workpiece unloading.
The workpiece unloading command is output from the register 34 and the workpiece 1
General delivery will be carried out.

(4) The operation of the present invention will be explained based on the flowchart of FIG. In FIG. 4, when the setup change is completed at the lsj station 104a of the machining center 100a at the 0th stage, the setup change switch (SSI) 3a of the main operation panel 105a is activated at the 0th stage.

Turn on the NC program control switch (RSI) 3b and the workpiece type switch (SWI) 3c.

At the 0th stage, the inputs of each switch are taken into the PC device 102a. Since the PC device 102a is connected to the NC device 101a, the NC device 101a prepares for machining at the 0th stage, and when the preparation is completed, the B workpiece is processed by the machining center 100a at the 0th stage.

On the other hand, the NC program level and work type are stored in the memory 5.6 at the 0th stage from the PC device 102a at the 2nd stage. 0th
It is determined whether the setup changeover switch (SW2) 13a is turned on in the step. If it is turned on, advance to stage 0 and turn it on.
If it is not, the feed will be hacked.

In the 0th stage, it is determined whether the machining center 100b has returned to the original position. If it returns to the origin position, it is 0th
If it advances to stage 0 and has not returned to the origin position, it will be fed back before stage 0.

At the 0th stage, it is determined whether there is any remaining work. If there is any remaining work, proceed to stage [phase]; if there is no remaining work, proceed to stage 0.

In the [phase] stage, it is determined whether it is M2O or not. If the state is not M2O, it returns to the front of the [phase] stage, and if it is M2O, it returns to the 0th stage.
Proceed step by step. Counter at 0th stage ΣCN=PN (setting value)
, (where CN is a cycle counter), and when the count is up, proceed to the 0th stage.

If it is determined that there is no remaining workpiece at the 0th stage, M2 is set at the 0th stage.
It is determined whether or not the state is O. If the state is M2O, the process advances to stage 0, and if it is not the state M2O, the process is repeated until the state becomes M2O.

A waiting time timer (DT) 22 is set in advance until all the workpieces on the transport path in front of the station are used in the [phase] stage, and when the time is up, the process advances to stage 0 and setup begins. will be carried out. Setup work is performed in the 0th stage, and the setup change switch (SS2
) 13a, NC program switch (R32) 13
b and the work type switch (SW2) 13c are turned on, and the inputs of each switch are taken into the PC device 102b at the 0th stage. Since the PC device 102b is connected to the NC device 101b, the NC device 101b prepares for machining and completes it at the 0th stage.

The NC program data and work type are stored in the memories 32 and 33 from the PC device 102b in the 0th stage. Part [
Based on the NC program stage and work type stored in memory 32 and 33 in the [phase] stage, PDM2 and PDM are created in the [phase] stage.
l, WI) Compare M2 and WDMI with the comparison circuit 30,
PDM2=PDM1. WDM 2. = WDM
When it becomes 1, the setup change is completed and machining is started. P.D.
M2=PDM1. If WDM2 does not become equal to WDM1, it is fed back before the 0th stage.

In the [phase] stage, the NC program teeth and work type stored in the memories 32 and 33 are transmitted to the next station via the interface 35.

<Effects> By employing the setup change processing device of the present invention, setup work can be greatly reduced compared to conventional methods. In particular, the setup time can be reduced by about twice as compared to the conventional method.

Furthermore, when the setup change processing device of the present invention is used, the setup work is automatically performed, so the setup work for the operator is reduced compared to the past, and can be done more efficiently, improving work efficiency and ultimately increasing the operating rate. This will lead to improvements in

[Brief explanation of drawings]

FIG. 1 is a control block diagram showing the configuration of the present invention. Figure 2 (al~(hl) is a model diagram explaining the basic principle of the setup change processing device of the present invention. Figure 3 shows three NC machine tools arranged in series, with a conveyor line in front of them. FIG. 4 is a flowchart for explaining the present invention in detail. 1.11...CPU 2b, 12b...Keyboard 3a, 13a=Switch for setup ( SSI,
5S2) 3b, 13b... Switch for NC program floor (1?SL, R52) 3c, 13c... = Switch for work type (SWI, 5W2) 5... NC program memory (PDMI) 6... Work Type memory (
WDMI) 19...Counter 22...Waiting time timer (DT) 100a-100c...Machining center 10102a=102 PC device 103a-103c...Work table 104...
・Transport path 104a...1st station 1
04b...2nd station 104c...3rd station 105a = 105cm = Go to main operation panel Figure 1 MCJ

Claims (1)

[Claims] A plurality of NC machine tools are arranged in series, and in the conveyance path arranged in front of each NC machine tool, a setup change switch, an NC program number, and a switch are installed for each NC machine tool. Each main operation panel has a switch for the type of work and a switch for the work type,
NC program No. of each main operation panel. Each NC program No. input from a switch for storing an NC program is stored. A memory, a work type memory that stores the work type input from the work type switch on each main operation panel, and a work type memory that stores the work type that is input from the work type switch on each main operation panel, and a work type memory that stores the work type remaining at the station on the transport path based on the setup change start reception signal received from the PC device in the previous process. means for determining whether or not there is a remaining workpiece, and if the determining means determines that there is a remaining workpiece, the number of remaining workpieces is compared with a preset value number of pieces, and the count is increased when the number of remaining workpieces is less than the set value number of pieces. If the judgment means indicates that there is no remaining work, the cycle time is compared with the setup change internal timer, and when the cycle time is smaller than the setup change internal timer, the time is up and a setup change start signal is output. The NC program No. of the previous process is determined by the setup change start signal determining means that is stored at least, and the setup change start signal from the setup start signal determining means. Work type and post-process NC program No. A setup change processing device characterized by comprising a setup change completion signal determining means for feeding back a setup change completion signal to a PC device in a previous process, which completes the setup change when the work type is compared with the workpiece type. .