JPS6288560A - Broken tool handling equipment in FMS - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a flexible manufacturing system (hereinafter referred to as FMS), particularly a machine, and an automatic pallet changer (hereinafter referred to as APC).

This invention relates to a broken tool processing device in an FMS that has a pallet II carriage (hereinafter referred to as a carriage), a pallet stocker, a tool stocker, etc., and supplies pallets for workpieces and pallets for tools to a machine on the same transport route.

[Conventional technology]

Conventionally, FMS has a machine, an APC, a trolley, a pallet stocker, and a tool stocker, and supplies pallets for warders and pallets for tools to the machine on the same transport path.
When tool breakage occurred during machining of a workpiece at the current machining position, it was handled only by a series of fixed pallet exchange operations by the APC. In other words, in the conventional pallet exchange operation, the APC installed between the machine and the trolley
This is done through a series of movements including a turning operation and a loading/unloading operation to the current processing position on the machine and to the cart position.

[Problem that the invention seeks to solve]

However, when tool breakage occurs, traditional APC
If you try to process the process using only a series of pallet exchange operations, there will be a problem that there will be many unnecessary operations in the APC operation from supplying the pallet for spare tool exchange to supplying the pallet for the subsequent processing workpiece, making it impossible to process quickly. .

In other words, the trolley may become stuck supplying damaged tools or the next workpiece and cannot provide transport services to other machines, or computers and machines.

Also, there is a lot of processing to check the operation with the trolley, which makes it a waste of time.

In addition, at the APC preparation position (next processing position) when a broken tool occurs, processing operations differ depending on the situation, such as the pallet for next processing workpiece tool group replacement, pallet for tool replacement with a limited lifespan, and pallet for spare tool replacement. However, the supply method became complicated, causing problems in FMS operations.

The purpose of the present invention was proposed in order to solve the problem in view of the above-mentioned circumstances, and in order to give top priority to workpiece machining ordered in scheduling, it is possible to provide a tool pallet when a tool breaks and to process the current workpiece. Alternatively, it is an object of the present invention to provide a broken tool processing device in an FMS that enables the most rational transfer processing of a pallet for processing the next workpiece.

[Means and effects for solving the problem] The present invention provides a host computer and a main control device for each NG machine tool and each AP unit to be given commands from each NC on the same transport path.
This is a broken tool processing device in the FMS that is supplied to machine tools, and its specific means include processing completion signals, 9th work center signal, group tool set signal, life tool set signal, and tool breakage signal 1st workpiece signal. When a damaged tool occurs during machining, the first processing means when there is a next machining work pallet at the next machining position of the APC and the tool group at the next machining position of the APC are determined by the use signal, program operation completion signal, and preliminary tool set signal. It is composed of a second processing means when there is a pallet for replacement, and a third processing means when there is a pallet for replacing the life tool at the next processing position of the APC.

Therefore, the above 1. The second and third processing means are operated by a combination of processing programs for normal exchange operation, unloading operation, and loading operation of the APC, which will be described later. Tool pallet supply and conveyance of the current workpiece and the next workpiece pallet are performed most rationally.

〔Example〕

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

(1) First, the overall configuration of an FMS line suitable for implementing the present invention will be described.

FIG. 6 is a schematic diagram of an FMS line suitable for implementing the present invention.

In FIG. 6, the system is roughly composed of a management department and a work department, and the management department includes a line management control section 100 and a general management control section 101. The line management control unit 100 controls the flow of each processing process while the system is online.
The comprehensive management control unit 101, which is located above the tool station 119. which is the preparation information of the present invention, manages the tool station 119. Each NC machine 103a, 103b.

103c, 103d tool magazine 1218° 121b
, 121c, 121d and the tool room 120, tool management data, NC data, machining schedule data, setup schedule data, etc. are comprehensively grasped and managed. The line management control section 100 and the general management control section 101 are connected to each other via a modem (modulation/demodulation device) between the CCU (communication controller G unit), and transmit and receive data.

In the work department, the main controller 102 is the line management control unit 10
The command data sent every moment from 0 to each NC machine 10
3a, 103b, 103c.

103d PC device (programmable controller)
Commands are given to 122a, 122b, 122c, and 122d. Along with the line management control section 100, the main control device 102 and the NC device 10°4a.

104b, 104c, 104d are optical data highway 1
05, and the necessary data is taken in as needed via the NLU (Network Linkage Unit).

The main control device 102 is for each NC machine 103a, 103b, 1
03C, and 103d APC123a, 123b,
123c and 123d.

In addition, the main controller ``02'' is operated by a bogie 108. It is also connected to a ground platform 110 that controls the stacker crane 109. Furthermore, a tool station 119 equipped with a tool stopper for supplying tools and an operation panel 112 located at the setup station 111 that mainly controls manual operations for setup are connected, and a terminal 113 for inputting setup information and displaying setup instructions is connected. N.L.U.
It is connected to the.

The worker operates the terminal 113 to output the setup rescheduling data and processing schedule data created through load calculation, and confirms the work schedule for day -.

At the setup station 111, necessary workpieces, necessary work storage 114 and pallet storage 11 are stored.
5, and the workpiece is mounted on the pallet at station 116 using necessary jigs and tools.

Under the control of the FMS type control system shown in FIG. 6, the pallets P prepared in the setup-side pallet stocker 117 are temporarily held at a predetermined position in the machine-side pallet stocker 118 by the stacker crane 109. Main controller 102
According to a command from the operator, a desired pallet (P) is transported by a trolley 108, and is carried into, for example, the N0 machine 103b. The processed pallet P is transferred to the next process by the cart 108 or placed on the machine side pallet stocker 118.

(2) Next, the basic principle of the present invention will be explained.

First, in explaining the basic principle of the present invention, three basic APC operations applied to exchanging pallets will be explained.

FIGS. 2(8) to 2(C) are model diagrams explaining three basic APC operations applied to exchanging pallets.

In Fig. 2 (A) to (C), for example, the NG machine 103b
A cart 108 carries a pallet Pt along a track 106 in front of
and stopped at a position in front of the N0 aircraft 103b.
The processed pallet P1 and the next processing pallet P2 are exchanged by the PC 123b.

FIG. 2(A) shows a conventional pallet exchange operation performed by APC. i.e. pareso l”
Pz is pulled from the cart position D to the position A of the APC 123b. Next, the pallet P at the processing position C is APC1
23b to position B, APC 123b turns 180 degrees, and then pallet P reaches position 1FB! The series of operations of simultaneously pushing out the pallet P1 that has reached the position A to the processing position C and the pallet P1 that has reached the position A is called A.
This is a normal PC exchange operation. (The following is a normal exchange operation.) Here, in addition to the above-mentioned normal exchange operation, a function that enables the following operation is added to the APC 123b using a known technique. That is, in FIG. 2(B), the pallet P, which is at the processing position C, is pulled into the position B of the APC 123b, and the APC,1
23b turns 180 degrees, then APC123b position A
Palette P in.

Add the action of pushing out to the trolley position. This action is A
This is called an unloading operation of the PC 123b.

Figure 2 (C) shows the pallet) Pg at the trolley position.
123b to position A, APC123b is 180
degree turn, then pallet at position B of APC123b)
Add the action of pushing Pz to processing position C. This operation is called the carrying-in operation of the APC 123b.

Note that the position A of the APC 123b is normally a standby position for the next workpiece, and will be referred to as the next processing position A hereafter.

Conventionally, pallet exchange was performed only by the normal exchange operation shown in Figure 2 (A), but the pallet exchange of the present invention involves a
Using the three basic operations of the normal exchange operation shown in Figure (A), the unloading operation shown in Figure 2 (CB), and the loading operation shown in Figure 2 (C), commands are given by squeezing when a tool is damaged. This is a broken tool processing device that gives top priority to machining damaged workpieces.

When a tool breaks during machining, the next machining position A has either the 8th machining work pallet B, the tool group pallet, or the life tool pallet.

The basic operations in these three cases will be explained using FIGS. 3, 4, and 5.

The NC machine in FIGS. 3, 4 and 5.

Positional relationship of APC and truck 2 Names 9 Numbers are the same as those used in FIG. 2, so details will be omitted.

A description will now be given of the tool breakage process according to the present invention when a next workpiece is present at the 0th machining position A and the tool breaks.

In Fig. 3 (a), there is a next machining workpiece at the next machining value IA,
- The tool used in the NC machine 103b is damaged. In this case, since there is a defective workpiece at machining position C, the defective workpiece is moved from machining position C to APC123b.
When the APC 123b is then rotated 180 degrees at position Bt-1, it will be in the state shown in FIG. 3 (0). The defective workpiece that has arrived at the next processing position A in the state shown in FIG. 3 (rl) is carried out to a position 10 degrees above the cart.

In other words, the zero-order machining workpiece whose operations from FIG. 3(A) to FIG. 3(U) are processed by the above-mentioned unloading operation is at machining position C.
It remains at position B of the APC 123b.

Next, the cart 108 stores spare tools to be replaced with the damaged tools on a tool pallet and transports them to the next processing position A<. Then, the state shown in Fig. 3 (8) is reached. APC in the state shown in Figure 3 (c)
Turn 123b 180 degrees, position APC123b, B
Move the damaged spare tool to processing position C as shown in Figure 3 (d).
be transported to. In other words, the zero-order machining workpiece whose operations up to FIG. 3(d) are processed in the carry-in operation is kept on standby with the next machining value of 11A. When the spare tool at machining position C in FIG. 3(d) is replaced with the damaged tool and the damaged tool is stored in the tool pallet, the state shown in FIG. 3(d) is obtained. Tool exchange is performed using the main shaft of the NC machine 103b, as shown in Figure 3 (N).
The damaged tool moves from machining position C to position B of APC123b.
Next, the APC 123b rotates 180 degrees, the next workpiece is replaced from the next processing position A to the next processing position B, and the damaged tool is replaced from the next processing position B of the APC 123b to the next processing position A. As shown in Fig. 3 (to). As shown, the operation of transporting the next machining workpiece from position B of APC 12βb to machining position C and the damaged tool from the next machining position A to the position of trolley 108, that is, from Fig. 3 (*) to Fig. 3 (to) The operation is processed as the normal exchange operation of the APC, and processing begins as shown in FIG. 3 (G).

(b) A tool breakage process according to the present invention will be described when a tool group pallet containing tools to be used for the next workpiece is stored in the 0th machining position A and a tool breakage occurs.

FIG. 4(A) shows a state where the tool group pallet is at the next processing position λ and the tool being processed by the NC machine 103b is damaged.

In this case, there is a defective workpiece at machining position C, so if the defective workpiece is moved from machining position C to position B of APC 123b and then APC 123b is rotated 180 degrees, the defective workpiece is moved from position B of APC 123b to next machining position A. Then, the tool group palette is replaced from the next processing position A to the position B of the APC 123b.

Furthermore, as shown in FIG. 4 (El), the tool group pallet is moved from position B of the APC 123b to machining position C, and the defective work is carried in and out from the next machining position A to cart 108 [D], that is, as shown in FIG. The operations from a) to FIG. 4(b) are processed by the normal ++ conversion operation of the APC. The tools in the tool group barre throat are stored in the tool magazine 121b via the main shaft of the NC machine 103b. Also,
Scheduled tools among the tools in the tool magazine and the tools in the spindle are stored in the tool pallet via the spindle.

If the damaged tool is scheduled to be replaced with a tool in the tool group pallet that will be used for the next processing at the processing position, or the damaged tool is stored in the tool magazine of the NC machine and will not be used for the next processing. In this case, the state shown in FIG. 4(0) shifts to the state shown in FIG. 4(c).

In other words, when the tool group is replaced, the tool group pallet after replacement is changed from the machining position C to the APC 123b.
, and the next workpiece is coming from the position of the cart 108 to the next processing position A.

In this state, the APC 123b is rotated 180 degrees, and the next workpiece is moved from the next processing position A to the position B of the APC 123b.
The replaced tool group pallet is replaced from position B of APC 123b to next machining position A. In this state, as shown in FIG. 4(d), the next workpiece is carried in and out from the position B of the APC 123b to the processing position C, and the tool group pallet is carried in and out from the next processing position A to the position of the cart 108, that is, the fourth operation. AP the operations from Figure (C) to Figure 4 (D).
It is processed by the normal exchange operation of C, and processing starts as shown in FIG. 4(S).

In the state shown in FIG. 4 (El), when the tool group is replaced, if the damaged tool is not scheduled for replacement and is not stored in the tool group pallet, but is stored in the tool magazine and used for the next processing, The state shifts from FIG. 4 (El) to the state shown in FIG. 4 (N).

In other words, when the tool group is exchanged, Figure 4 (ne)
As shown in , the replaced tool group pallet comes from the machining position C to the position B of the APC 123b, and from the position of the tool pallet cart 108 containing the spare tools to be replaced with the damaged tools to the next machining position A. APC123b 18
After turning 0 degrees, the tool pallet for spare tools is replaced from the next machining position A to the position B of the APC 123b, and the replaced tool group pallet is replaced from the position B of the APC 123b to the next machining position A. In this state, as shown in FIG. 4(f), the spare tool pallet is carried in and out from the position B of the APC 123b to the machining position C, and the tool group pallet is carried in and out from the next machining position A to the position of the cart 108, that is, the fourth operation.
The operations from FIG. 4 (ne) to FIG.

The spare tool and the damaged tool are replaced from the state shown in Fig. 4 (g), and the work pallet containing the damaged tool is moved from the machining position C to the position B of the APC 123b, as shown in Fig. 4 (g).
Since the next processing workpiece has come from the position of the cart 108 to the next processing position A, turn the APC 123b 180 degrees,
Move the next machining workpiece from the next machining position A to APC123b's position B, and move the damaged tool pallet to APC123b's position B.
to the next machining position A. Next, as shown in FIG. 4 (H), the next workpiece is carried out from the position B of the APC 123b to the processing position C, and the pallet of the damaged tool is carried out from the next processing position A to the position of the cart 108, that is, the operation shown in FIG. The operations from ) to FIG. 4(h) are processed by the normal exchange operation of the APC, and machining begins as shown in FIG. 4(s).

C) A tool breakage process according to the present invention will be described when a tool life replacement pallet is present at the 0th machining position 1jA and a tool breakage occurs. FIG. 5(a) shows a state where there is a pallet for exchanging tools with a limited life at the next processing position A, and the tool being processed by the NC machine 103b is damaged.

Since there is a defective workpiece at machining position C, the defective workpiece is moved from machining position C to position B of APC 123b, and then transferred to AP
When C123b is turned 180 degrees, the defective workpiece is APC1.
23b from position B to next machining position A, and the life tool replacement pallet is replaced from next machining position A to position B of APC 123b. Furthermore, as shown in FIG. 5 (III), the pallet for exchanging tools with a limited life is transferred from the APC 123b WB to the machining position C, and the defective workpiece is transferred from the next machining position A to the cart 108.
The operations of loading and unloading to and from the positions shown in FIG. 5(A) to FIG. 5(U) are processed by the normal exchange operation of the APC.

Next, as shown in FIG.
It is carried from D to the next processing position A. The spare tools stored in the life tool replacement pallet at the machining position C are exchanged with the life tool in the tool magazine via the spindle. here,
If the damaged tool has reached the end of its service life and is scheduled to be replaced, or if the damaged tool remains in the tool magazine without being used for the next process, the process moves to Figures 5 (D) and (N). . That is, as shown in Fig. 5 (=)
Then, the APC 123b is rotated 180 degrees to replace the replaced life tool replacement pallet from the APC 123b's position B to the next machining position A, and the next machining workpiece is replaced from the next machining position A to the APC 123b's position B. . In this state, as shown in Fig. 5 (*), the next workpiece is cut into the APC12
3b from the position B to the machining position C, and the operation of carrying the replaced tool replacement pallet from the next machining position fiA to the position of the trolley 108, that is, from FIG. 4(d) to FIG.
The operations up to (e) are processed by the normal exchange operation of the APC, and machining begins as shown in FIG. 5 (f).

When the damaged tool stored in the tool magazine 121b or the damaged tool inserted into the spindle in the state shown in FIG. 5(d) is used for machining the next workpiece,
After turning 80 degrees, as shown in Fig. 5 (g), move the replaced pallet for tool replacement from position B of APC123b to next machining position A, and move the next workpiece from next machining position A to APC1.
23b at position B. In this state, the pallet for replacing long-life tools after replacement is carried out from the next processing position A to the position of the trolley 108, that is, the operation shown in FIGS.
The operations up to (g) in the figure are processed by the APC'ti output operation.

Next, the pallet of spare tools is carried to the next machining position A as shown in Figure 5 (H), and the APC12 is placed in the state shown in Figure 5 (H).
Turn 3b 180 degrees and move the next workpiece to APC123.
b from position B to next machining position A, and the pallet of spare tools is replaced from next machining position IA to position fB of APC 123b. In this state, as shown in Figure 5, attach the spare tool to A.
The operation of transporting the PC 123b from position B to processing position A, that is, the operation from Fig. 5 (h) to Fig. 5 (su) is shown in A.
It is processed by the import operation of the PC.

At this point, replace the spare tool and the damaged tool, and then
As shown in (a pallet of damaged tools is placed at processing position C).

After checking whether the spare tools on the tool pallet have been replaced in the state shown in Figure 5 (e), the pallet containing the damaged tool is rotated 180 degrees from the machining position C to the position B of the APC 123b. The tool palette moves from position B of APC123b to next machining position A.
Then, the next workpiece is replaced from the machining position A to the position B of the APC 123b. In this state, the loading and unloading operations as shown in FIG. 5 (W), that is, the operations from FIG. 5 (S) to FIG.
Processing begins as shown in the figure (f).

Note that when the Taft sensor detects damage to the new tool during tool replacement in Figures 5 (c) and (!J), the above-mentioned item (a) will be applied.
Since the processing is performed by the same means as in the case of page 12), detailed explanation will be omitted.

(3) Next, the configuration of the present invention will be specifically explained.

The first diagram is a control block diagram illustrating the present invention in detail.

In FIG. 1, the main controller 102 and
The NLU is connected and the FMS line explained in FIG. 6 is controlled.

Each CPU 1 has a tool center file 2. Tool magazine file 3. NC tool file 4゜Tool change - request processing program 5. The pallet information file 6, tool stocker file 7, and tool exchange request file 5a are connected.

An example of the contents of the tool center file 2 is shown in FIG. 7(A). In other words, in FIG. 7(A), the tool center number in item 1 differs depending on the individual tool.
The first four digits are numbers given to the same type, diameter, length, and component parts, and the last two digits are serial numbers given to the number of items in stock.

If the first four digits are different, the tools are not compatible. The storage location for item 2 is the tool magazines 1218 to 121d of the machine in FIG. 6, and the tool station 119.
Or whether the tool room 120 is in a usable state.
The tool room 120 indicates whether there is a need for combination/presetting. Among the last three terms, the cutting time indicates the usage time, and the remaining life time is obtained by subtracting the cutting time from the life time.

In the tool status item at the end, a detection mark rt 1 tt of a damaged or tool with a lifespan is set depending on the status.

An example of the contents of tool magazine file 3 is shown in Figure 7 (B).
It looks like this.

That is, in FIG. 7(B), the first item is the pot, the second item is the tool center, and the third item is the tool exchange request, which are arranged for each tool. An example of the contents of the NG tool file 4 is shown in FIG. 7(C). That is, the seventh
In Figure (C), the magazine number is listed in the first section, and the tool center number and estimated usage time are organized and filed for each tool in the second section. .

As shown in FIG. 7(D), the tool change request processing program 5 organizes the data into bots, removal tools, and installation tools and files them in a tool change request file 5a.

An example of the contents of the pallet information file 6 is as shown in FIG. 7(E) (PL (pallet) Na, WK (work) - ID and tool center file are organized and filed.

An example of the contents of the tool stocker 7 cuff aisle 7 is organized and filed in correspondence with tool center black and tool stocker depth, as shown in FIG. 7(F).

A processing completion signal is taken into the AND gate 11. A
The next work set signal at the next machining position A of the PC 123b is the OR gate 8. And Gate 12. And Gate 16. It is taken into OR gate 10, AND gate 19, and AND gate 20. Group toolset signals are OR gate 8 and AND gate 1
It will be incorporated into 5. The life toolset signal is captured into OR gate 8 and AND gate 18.

Tool damage signal is NAND gate 9. and gate 1
2. It is taken into AND gate 15 and AND gate 18. Next work use signal is AND gate 12.
And Gate 16. And Gate 17. It is taken into AND gate 1-19 and AND gate 20.

The program operation completion signal is output from AND gate 13. AND GATE 14° AND GATE 16. and gate 1
7. And Gate 19. And Gate 20. It is taken into AND gate 21 and AND gate 22.

The preliminary toolset signal is taken into an AND gate 10 and an AND gate 21.

Now, when any one of the next work set signal, group tool set signal, or life tool set signal taken into the OR gate 8 is taken into the AND gate 11, and there is no tool breakage signal, the NAND The signal passing through gate 9 is taken into AND gate 1-11. When the machining completion signal is received, the AND gate 11 is opened by the signals from the three parties mentioned above, and A is output as the start signal.
It is taken into the PC normal exchange operation program 23, and the Apc
A normal exchange operation is performed.

The AND gate 12 opens when the next work set signal, tool damage signal, and next work use signal are received, and are taken into the APC carry-out operation program 24 as a start signal, and the APC carry-out operation is performed.

The signal passed through the AND gate 12, the program operation completion signal, and the preliminary tool signal are taken into the AND gate 13. and game) 13 is opened by the signals from the three parties mentioned above, and the APC@input operation program 2 is used as the start signal.
5, and the APCg human action is performed.

The signal passed through the AND gate 13 and the program operation completion signal are taken into the AND gate 14. and·
The gate 14 is opened by the above-mentioned two signals, and is taken into the APC crossover operation program 23 as a start signal, and the AP
A normal exchange operation of C is performed.

The AND gate 15 takes in the tool damage signal and the spare tool set signal, and takes them into the APC exchange operation program 23 as a start signal. Therefore, a normal APC exchange operation is performed.

When the signal passing through the AND gate 15, the program operation completion signal, the tool damage signal, and the next work use signal do not rise, the AND gate 16 opens and AP is used as the start signal.
It is taken into the C exchange operation program 23, and the normal APC
An exchange operation is performed.

The signal that passed through the AND gate 15, the program operation completion signal, the primary work use signal, and either the next work set signal or the spare tool cent signal that passed through the OR game) 10 are taken into the AND gate 17. This signal is taken into the APC exchange operation program 23 as an opening start signal, and normal AP and C exchange operations are performed.

The AND gate 18 opens when the life tool set signal and tool breakage signal are taken in and outputs A as a start signal.
This is taken into the PC exchange operation program 23, and a normal APC exchange operation is performed.

Signal passed through AND gate 18, tool damage signal 1
When the next work set signal and the next work use signal do not rise, the AND gate 19 opens and is taken into the APC exchange operation program 23 as a start signal, and a normal APC exchange operation is performed.

The AND gate 20 is opened by the signal that has passed through the AND gate 18, the primary work use signal, the 9th work set signal, and the program operation completion signal, and outputs the APC as the start signal.
This is taken into the unloading operation program 24, and the APCg unloading operation is performed.

The AND gate 21 is opened by the signal passed through the AND gate 20, the program operation completion signal, and the preliminary toolset signal, and the APC loading operation program 2 is started as a start signal.
5, and the APC import operation is performed.

The AND gate 22 is opened by the signal passing through the AND gate 21 and the program operation completion signal, and the signal is taken into the APC exchange operation program 23 as a start signal, and a normal APC exchange operation is performed.

In this manner, the present invention utilizes APC when dealing with corrupted tools.
The process is performed by skillfully utilizing the normal exchange operation, unloading operation, and loading operation.

(4) Next, the present invention will be explained in detail.

The three processing operations of the present invention explained in (2) above will be explained.

B. When the next workpiece is at the 0th machining position A and the tool is damaged, the operations shown in FIG. and processed by the APC's unloading operation. The operations in Figure 3 (c) and (d) are AND gate 1
3 is opened, the APC II human movement signal is taken into the carry-in operation program 25 as a human movement open signal start signal, and the APC carry-in operation is performed. The operations shown in FIGS. 3(N) and (F) are taken into the APC normal exchange operation program 23 as a start signal when the AND gate 14 opens, and the APC normal exchange operation is performed, resulting in the operation shown in FIG. 3(G). Processing begins as shown.

(b) If tool breakage occurs due to tool group paresotoka at 9th machining position A, the operations in Fig. 4 (a) and (b) are as follows: AND gate 15
opens and uses the APC normal exchange operation program 2 as a start signal.
3, and normal APC exchange operation is performed. Similarly, in the operations shown in FIGS. 4(c) and 4(d), the AND gate 16 is opened, a normal APC replacement operation is performed, and machining is started as shown in FIG. 4(s). Also, Figure 4 (ne), (
), ()) and (ch) are operated by AND gate 17
and 18 open in order and issue a start signal, which is taken into the APC normal exchange operation program 23, and the APC normal exchange operation is performed in order to start machining as shown in FIG. 4(S).

There is a tool life replacement pallet at the primary machining position.
If tool damage occurs, the operations shown in Fig. 5 (a) and (0) are as follows: AND gate 18
is taken into the APC normal exchange operation program 23 as an opening start signal, and the APC normal exchange operation is performed.

After replacing the life tool in Figure 5 (C), Figure 5 (=)
The operations of and (ne) are performed. That is, and
The gate 19 opens and the signal is taken into the APC normal exchange operation program 23 as a start signal, and the APC normal exchange operation is performed.

Then, processing begins as shown in FIG.

Further, the operations shown in FIGS. 5(d) and 5(g) are taken into the APC unloading operation program 24 as a start signal when the AND gate 20 opens, and the APC unloading operation is performed.

The operations in Figure 5 (H) and (S) are AND gate 21
is opened and the APC loading operation program 2 is used as a start signal.
5 and the APC and II operations are carried out.

After replacing the spare tool with the damaged tool as shown in FIG. 5(N), the operations shown in FIGS. 5(X) and (W) are performed. That is, the AND gate 22 opens and is taken into the APC normal exchange operation program 23 as a start signal, and the A
The normal exchange operation of the PC is performed, and machining begins as shown in FIG.

〔effect〕

The present invention is an FMS that has an NC machine tool, an APC, a trolley, a pallet stocker, a tool stocker, etc., transports workpiece pallets and tool pallets on the same transport path, and supplies workpieces and tools to the machine. When a damaged tool occurs, it can be replaced with a spare tool, and the next workpiece can be quickly supplied, greatly reducing the waiting time for machining compared to the conventional method. This has the effect of making it possible to flexibly respond to various situations when a damaged tool occurs, and improving production efficiency.

[Brief explanation of drawings]

FIG. 1 is a control block diagram specifically explaining the configuration of the present invention. FIGS. 2A to 2C are model diagrams explaining three basic APC operations applied to exchanging pallets. . FIGS. 3, 4, and 5 are model diagrams illustrating basic processing operations when a damaged tool of the present invention occurs. FIG. 6 is a schematic diagram of an FMS line suitable for implementing the present invention. Figure 7 (A) is a sample diagram showing an example of a tool center file, Figure 7 (B) is a sample diagram showing an example of a tool magazine file, and Figure 7 (C) is a sample diagram showing an example of an NC tool file. , FIG. 7(D) is a sample diagram showing an example of a tool change request file, FIG. 7(E) is a sample diagram showing an example of a barre/throat information file, and FIG. 7(F) is an example of a tool stocker file. FIG. 1...CPU 2...Tool center file 3...Tool magazine file 4...NC tool file 5...Tool exchange request processing program 6...Valent information file 7...Tool stocker file 8 .10...OR gate 9...NAND gate 11-22...AND gate 23...APC exchange operation program 24...APC unloading operation program 25...APCJ one-person operation Child program 102
Control device 103a-103d...NC machine 104a=104
d...NC device 106, 107... Orbit l
#One trolley 118...am side bullet stocker 121a-121d...tool magazine 122a-12
2d-PC device 123a to 123d = APC Patent applicant Hitachi Seiki Co., Ltd. (D) (E) (F)
(G) (=) Off figure <A) Fang 7 figure CB) Off figure (C) Off figure (E) Spear 7 figure (F)

Claims (1)

[Claims] It has each NC machine tool, each auto pallet changer, pallet transport vehicle, pallet stocker, tool stocker, etc., and when commands are given from the host computer and main controller, the transport vehicle moves the same pallet for workpieces or pallets for tools. A broken tool handling device in an FMS in which a pallet for the workpiece or a pallet for tools is conveyed along a conveyance path from the conveyance vehicle to each NC machine tool via an auto pallet changer, and the damaged tool is removed during machining. A first broken tool processing means that replaces the damaged tool with priority and replaces the processed workpiece in the next stage when there is a next processing workpiece pallet at the next processing position of the automatic pallet changer when a tool is damaged during processing. a second damaged tool processing means that replaces the tool group with priority when there is a tool group replacement pallet at the next processing position of the automatic pallet changer and replaces the damaged tool or workpiece in the next stage; When there is a damaged tool inside, if there is a tool replacement pallet with a limited lifespan at the next processing position of the automatic pallet changer, the third damaged tool process is to give priority to the tool with a limited lifespan and replace it, and replace the damaged tool or workpiece in the next stage. A broken tool processing device in an FMS, characterized in that it consists of means.