JPH0724883B2 - Press production system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a production system which is particularly suitable for implementation in a press plant of a high-mix, low-volume production system.

(Prior Art) Conventionally, in a car factory, in order to reduce the inventory quantity of breath products as much as possible, a so-called kanban system is adopted, which is a system for producing and managing the required breath products when and when they are needed. . FIG. 2 shows a conventional kanban system. When the body assembly line 31 desires to replenish the breath product P, an operator pushes a request button 32 to send a breath product request signal to the destination indicator 33. Sent. Then,
The destination indicator 33 uses the transport instruction card 34 containing the product number, store address, body address, breath product name, pallet address, and line address to transport the lift 35 to the stockyard 36.
An instruction is made to go out to take the desired breath product P, and the breath product P is transported by the transport lift 35 to the body assembly line 31. At the same time, store intensive Kanban rack 37
Includes the product number, lot size, standard number of parts, store address,
The triangular instruction card 38 with the line address is hung.

Triangle instruction card hung on store concentration Kanban rack 37
38 is a transportation lift only once a predetermined time, for example, once an hour 39
Are carried to the press line end kanban rack 40, and production instructions of the necessary pressed products P are given respectively. In response to this production instruction, in the press line 41, the worker sets the breathing conditions such as the hydro blank holder air pressure and die height to carry out the lot production of the breathing product P. When the lot production is completed, the produced pressed product P is transported to the stockyard 36 by the transportation lift 42 and stored therein.

(Problems to be Solved by the Invention) However, there are the following problems in the flow of the pressed product and the information signal as described above. That is, it is difficult to immediately grasp the accurate stock quantity of the pressed product P in the stockyard 36, and a great number of man-hours are required to grasp it. If production control is performed only based on the above Kanban information, the condition that the flow is delayed by the production time of the breath product P also overlaps, and depending on the diversified production amount of the pressed product P, the body assembly line 31 may be used. Out of stock may occur. Further, since the worker sets the processing conditions in the press line 41 each time, the pressed product P
If the number of types increases, there is a great risk of quality deterioration due to setting mistakes.

The present invention has been made in view of the problems of the prior art, and in association with a press product assembly line, automatically determines a necessary press product, issues a production instruction for the press product, and manages the inventory of the press product. Therefore, it is intended to provide a pressed product production system that accurately manages the stock amount, eliminates out-of-stock items, and improves quality.

(Means for Solving Problems) As a technical means for achieving the above object, the present invention comprises an inventory management system, a setup management system, a press working condition setting system, a transfer management system, and a production instruction system. .

The inventory management system has a means to check the product number and quantity of the stored items at the time of loading and unloading of the stored items in the automatic warehouse for materials and the automatic warehouse for pressed products, and a means to display and record the inventory amount of the stored items and this. And means for outputting the stock status of the stored items in both the automatic warehouses.

The setup management system includes storage instruction means for instructing to store a required number of materials in an automatic warehouse for materials, material set instructing means for instructing to set materials in the automatic warehouse on a press machine, and a desired press die. A die setting instruction means for instructing to set the press machine on the press machine, a means for outputting the completion of the setup of the material and the die, and an operation preparation instruction means for instructing to prepare the operation of the press machine after the setup is completed. is there.

The press processing condition setting system compares the material set completion signal and the mold set completion signal from the setup management system with the material specification information and mold specification information, respectively, and automatically determines that the material and the mold are planned. And a means for automatically setting the breathing conditions such as hydro blank holder air pressure for determining the outer load in the press machine for each type of required product.

The transfer management system receives a call signal from the press product assembly line, instructs the transfer of the press product by the first unmanned cart from the automatic press product warehouse to the press product assembly line, and calls from the press line. A means for receiving a signal and instructing the conveyance of the pressed product from the press line to the automatic warehouse for the pressed product by the second unmanned trolley.

The production instruction system receives the production status signal from the press assembly line and the press inventory status signal from the inventory management system to determine the processing order of the pressed product, and the processing order to the press processing condition setting system. It is provided with a means for outputting and a means for sending a transportation command and a setup command to the transportation management system and the setup management system, respectively.

(Operation) With the above configuration, when the production instruction system determines the processing order of the pressed products in response to the production status signal from the pressed product assembly line and the pressed product inventory status signal from the inventory management system, the processing order of the pressed products is While being sent to the press processing condition setting system, the transfer management system and the setup management system are respectively issued with a transfer command and a setup command within the press processing order.

When the transportation management system inputs a transportation command, the first unmanned trolley conveys the pressed goods in the automatic press warehouse to the pressed goods assembly line, and the second unmanned trolley automatically presses the pressed goods in the press line. Transported to the warehouse.

Then, in the setup management system, it is instructed to set the desired material stored in the material automatic warehouse in the press machine, and to set the desired mold in the press machine. When the material and mold setup is complete, the press is instructed to be ready for operation.

When the material setting completion signal and the mold setting completion signal are sent from the setup management system to the press processing condition setting system,
The material set completion signal and the mold set completion signal are compared based on the material specification information and the mold specification information. As a result, when it is determined that the material and mold set in the press machine are the ones planned, a current of a predetermined magnitude is supplied to the current proportional control valve, which allows the hydro blank to determine the outer load. Press working conditions such as holder air pressure are automatically set, and press working is performed.

The automatic warehouse for raw materials, which is short of raw materials, is instructed by the setup management system to store new raw materials until the required number is reached. The stock number and quantity of the stored material at the time of loading and unloading of the material automatic warehouse are confirmed by the stock management system, and the stock quantity of the material is recorded. This also applies to pressed products that are stored in automated warehouses for pressed products.
The stock status of the stored items in both automatic warehouses is constantly output.

As described above, according to the present invention, the press working conditions, the stock status of the materials and the pressed products according to the production amount, and the operation timings of the conveyance / setup are automatically instructed and controlled in a real-time system, so that the press working conditions Automatic setting is achieved, and at the same time, accurate transfer / setup management and production / inventory management are established.

(Examples) Examples of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is an automatic warehouse for press products having storage locations that are assigned addresses for each type of breath product P, and an unmanned trolley for carrying in the press products P from the intermediate warehouse 3 arranged in the press line 2. 4 is carried out by an unmanned trolley 7 to carry out to a press article relay point 6 arranged in the body assembly line 5. The presser P is taken in and taken out from the automatic warehouse 1 automatically by a stacker crane (not shown).

8 is a material W obtained by cutting the coil C to a predetermined size
In an automatic warehouse for materials, which has a storage location in which each type of material W is stored, the material W is automatically taken in and out by a stacker crane (not shown). The automatic warehouse 8 for materials and the automatic warehouse 1 for press goods record the inventory quantity, the collation means for confirming the product number and quantity of the stored items W and P at the time of loading and unloading. Inventory management system
It is provided with information transmission devices 9 and 10 for transmitting to 13.

Reference numeral 11 denotes a centralized control computer provided with a man-machine interface 12 such as a keyboard and a display, which includes an inventory management system 13, a setup management system 14, a press working condition setting system 15, a transfer management system 16 and a production instruction system 17. Is equipped with.

The inventory management system 13 includes means for inputting information from the information transmission devices 9 and 10 and a material automatic warehouse 8 based on the information.
And means for outputting the stock status of the automatic warehouse 1 for press products to the production instruction system 17.

The setup management system 14 operates in response to a setup command from the production instruction system 17, cuts the coil C into a predetermined size to obtain the material W, and supplies the required number of the material W to the material automatic warehouse 8. Material preparation instruction board 18 instructing to store
A desired material setup instruction panel 19 for instructing the designated press machine M to take out a desired material W from the automatic warehouse 8 and carry it by an unmanned trolley 22 and set a specified number at a specified time, and an automatic warehouse 23 for molds. To set the die 24 to the carrier 25 of the designated press machine M at the designated time, and to instruct the press machine M to operate when the setup of the material W and the die 24 is completed. A press machine setup instruction panel 21 is additionally provided. Further, the setup management system 14 includes an output unit that outputs that the setup of the material W and the mold 24 is completed.

The press working condition setting system 15 compares the material setup completion signal and the die setup completion signal from the terminals 26 and 27 with material specification information and mold specification information stored in the central control computer 11 in advance, respectively. The means for automatically determining whether the material W and the mold 24 have the expected specifications, and the predetermined press working conditions for each type of the target pressed product P and the material W are automatically determined. And means for setting to. As a specific mode of this setting means, by incorporating a current proportional control valve, the output current value is stored for each type of processing conditions, and by inputting in proportion to the output current value during operation, It is possible to adopt the one configured to automatically set the oil and atmospheric pressure.

The press working conditions here include, for example, when the press machine M is a double-acting type for drawing, a hydro blank air tank pressure that determines the wrinkle holding load, a gui cushion air pressure that determines the mold cushion pressure, and a mold weight. It is a balanced air tank pressure of a size suitable for hoisting, a point hydraulic pressure at the top dead center for transmitting the press pressure at the time of pressurization, a press speed and a die height.

The transport management system 16 includes terminals 28 on the body assembly line 5.
This signal processing is performed on the call signal sent from the production instruction system 17 from the automatic transmission system 1 for the breath product to the unmanned carriage (first unmanned carriage) 7 between the relay point 6 of the body assembly line 5. An unmanned trolley (second unmanned trolley) 4 between the press line 2 and the automatic warehouse 1 for press goods is subjected to this signal processing for a means for instructing operation and a call signal sent from the terminal 29 of the press line 2. And means for instructing the operation of.

The production instruction system 17 includes terminals 28 on the body assembly line 5.
From the information transmission device 10 of the automated warehouse 1 and the press product inventory status signal sent from the inventory management system 13 from the information transmission device 10 of the automatic warehouse 1, and press products according to a pre-programmed automatic machining order determination function. Display the production plan of P and its production plan, and its production plan.
It is provided with a CRT and a means for sending a transportation command and a setup command corresponding to the processing order of the pressed product P to the transportation management system 16 and the setup management system 14, respectively.

Next, the operation of the press product production system configured as described above will be described.

When the production instruction system 17 receives a production status signal from the terminal 28 of the body assembly line 5 or a pressed product inventory status signal from the inventory management system 13, the production instruction system 17
Automatically determines the processing order of the pressed product P according to the programmed standard order, and thereby determines the type and quantity of the panel product P to be produced and the production press line 2, and the setup management system 14, The conveyance management system 16 and the press working condition setting system 15 each send a command having contents corresponding to the working order.

When the transportation management system 16 receives a command from the production instruction system 17, the desired pressed product P in the automated press warehouse 1 is carried by the unmanned carriage 7 to the relay point 6 of the body assembly line 5.

At the same time, the desired pressed product P in the intermediate warehouse 3 of the press line 2 is transferred to the automated warehouse 1 for pressed products by the unmanned carriage 4.
It is transported to and stored in a designated place.

On the other hand, when the setup management system 14 receives a command from the production instruction system 17, the material sequential instruction board 18 and the material setup instruction board
19, the set-up instruction board 20, and the press machine setup instruction board 21 respectively operate appropriately, and the material preparation instruction board 18 instructs to cut the coil C to produce the material W and store the material W in the automatic mutual 8. To be done. Further, the material setup instruction board 19 and the die setup instruction board 20 respectively instruct to set the desired material W and die 24 from the automatic material mutual 8 and the automatic die warehouse 23 to the designated press machine M. In this case, the unmanned trolley 22 for transferring the material W is operated by a command from the transportation management system 16. When the setup of the material W and the mold 24 is completed,
The press machine setup instruction panel 21 instructs the press machine M to start preparations for operation.

When the press working condition setting system 15 receives a command from the production instruction system 17, the press working condition setting system 15 compares the material setup completion signal from the terminal 26 with the material specification information, and The mold setup completion signal from 27 is compared with mold specification information. As a result, when it is determined that the material W and the mold 24 set on the press machine M are the desired ones, the press working conditions suitable for the panel product P and the material W to be produced thereafter. Is automatically set via a current proportional control valve or the like. The automatic setting of the press working condition is continuously or intermittently performed after the first stroke as necessary.

Press molding is performed under the condition that the processing conditions are optimally set, and the obtained pressed product P is temporarily stored in the intermediate warehouse 3 of the press line 2. The unmanned cart 4 transports the pressed product P from the intermediate warehouse 3 to the automated press warehouse 1. In this case, the unmanned carriage 4 that carries the pressed product P is
Called by a signal from the terminal 29 of the press line 2, the operation of the unmanned vehicle 4 is controlled based on a command from the transportation management system 16.

(Effects of the Invention) As described above, the present invention relates to a press product assembly line to automatically determine a necessary press product, instruct production of the press product, and manage the stock of the press product. Since the system is combined, it is possible to always grasp the stock quantity of materials and pressed products accurately, and it is possible to flexibly cope with the high-mix low-medium volume production system. Even if there is a large fluctuation in the production volume on the press assembly line,
Since it is possible to quickly keep the stock quantity of various types of pressed products at an appropriate amount, it is possible to prevent occurrence of shortages in a conventional pressed product assembly line.

Further, according to the present invention, since appropriate processing conditions can be automatically set according to the type of the pressed product, a stable and uniform pressed product can be obtained without the manual setting error as in the prior art. In addition, the automation of material and die setup changes is promoted, which, combined with enabling the automatic setting of press working conditions, significantly reduces management man-hours and improves productivity compared to the past, and particularly in the case of a wide variety of products. In the medium-volume production press factory, the effect of labor saving and labor saving is extremely large.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a pressed product production system according to the present invention, and FIG. 2 is an overall configuration diagram illustrating the flow of a conventional Kanban system. 1 ... Automatic warehouse for pressed products, 2 ... press line, 4 ...
… Unmanned trolley (2nd unmanned trolley), 5 …… Body assembly line, 7 …… Unmanned trolley (1st unmanned trolley), 8 …… Automatic warehouse for materials, 11 …… Central control computer, 13 …… Inventory management System, 14 …… Setup management system, 15 …… Pressing condition setting system, 16 …… Transport management system, 17 ……
Production instruction system, 24 …… type, P …… pressed product, W ……
Material, M ... Press machine.

Front page continuation (72) Inventor Issei Kirii 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (56) References JP 57-180519 (JP, A) JP 58-215300 (JP , A) JP 61-95727 (JP, A)

Claims (1)

[Claims] 1. A press product production system for automatically determining a required press product, instructing the production of the press product, and managing the stock of the press product in association with the press product assembling line. And a means for confirming the product number and quantity of the two stored items at the time of loading and unloading of the two stored items in the automatic warehouse for press products, a means for displaying the stock amount of the two stored items, and a means for storing the stock amount. An inventory management system having means for outputting the stock status of both the materials automatic warehouse and the press goods automatic warehouse, and instructing the material automatic warehouse to store the materials until the required number is reached. Storage instructing means, material set instructing means for instructing to set the desired material stored in the material automatic warehouse in the press machine, and die set for instructing to set the desired die in the press machine A setup management system including a display means, a means for outputting a setup completion signal of the set of the material and the mold, and an operation preparation instruction means for instructing to prepare for operation of the press machine after the setup is completed; A means for comparing the material set completion signal and the mold set completion signal from the management system with the material specification information and the mold specification information, respectively, to determine that the material and the mold are scheduled, and the press load and die height. A press processing condition setting system including means for automatically setting press processing conditions such as the press machine for each type of required product, and a signal from the press product assembly line to receive the signal from the press product automatic warehouse, Means for instructing the conveyance of the pressed product by the first unmanned trolley to the pressed product assembly line, and the pressing machine receiving a calling signal from the pressing line Transport system including a means for instructing the transportation of the pressed product by a second unmanned trolley from the press to the automated warehouse for the pressed product, and a production status signal from the press assembly line and the inventory management. Means for receiving the pressed product inventory status signal from the system to determine the processing order of the pressed product, means for outputting the determined pressed product processing order to the press processing condition setting system, the transportation management system, A press product production system comprising: a production management system including a setup management system and means for sending a transfer command and a setup command according to the press product processing order.