JPH03226352A - Precision casting system - Google Patents

Abstract

PURPOSE:To execute maintenance of reading means and to automatically manufacture multiple products having different specifications without any errors by executing identification code reading movement in the reading means under condition of shifting a holding tool from reading position at the time of starting the shift or at the periodical time during working. CONSTITUTION:At the time of starting the shift, each hanger is stopped at the position shifting from the points S1 - S11 to execute reading test in the hanger number reader. In the case the reader is normal, all of eight beams outputted from an emitting part reach a beam receiving part to obtain the identification code of 8-bit all 1. In the case the beam axis in some beam is abnormal, or surface of the beam receiving part is dirty, the identification code except 8-bit all 1 is obtd. Further, even during working, the reading test in the hanger number reader is periodically executed. In the result of the above maintenance test, in the case of finding the error, an error message is displayed on a display device in a preceded treating process tracking control computer CP11. A maintenance operator goes to the error position and executes cleaning, exchange, etc. of the hanger number reader.

Description

[Detailed description of the invention]

1. Field of Industrial Application - The present invention relates to a precision casting system that performs precision casting such as lost wax casting. - Prior Art Lost wax casting has been known as a casting method for precision mechanical parts. The work flow will be described below with reference to FIGS. 9(a) to 9(h). First, as shown in FIG. 9(a), molten wax 2 is poured into a mold I having four parts corresponding to the external shape of the product (wax molding step). Then, after wax 2 solidifies, the mold! is opened, and a wax model 2a corresponding to the product is obtained. Here, the wax model 2a is made from a wax solidified body having a shape corresponding to the product.
has a protruding f-shape. And the rod-shaped part 2b
The tip of the wax model 2a is heated and melted, and the wax model 2a becomes the ninth
As shown in Figure (b), a predetermined number of pieces are adhered to a model support rod 3 having a thick wax layer formed on its surface. In this way, the model support rod 3 and the wax model 2a2a...
are assembled into one piece, and tree 4 is completed (assembly process). Then, as shown in FIG. 9(C), the tree 4 is immersed in WI5 for one day, storing a slurry liquid of a glue type such as zircon. Then, the tree 4 is taken out from the row 5, and the tree 4 is removed from the row 5 as shown in FIG.
As shown in d), sand is evenly distributed from above. As a result, sand adheres to the surface of the tree wetted with the slurry liquid. The slurry is then solidified by being left to dry for a predetermined period of time, and a mold layer is laminated on the surface of the tree 4. In general, it is not possible to obtain a mold layer thick enough to withstand casting in one lamination process, so the above-mentioned coating of the varnish slurry, sand sprinkling, and drying are repeated several times. coating process). After a mold layer of sufficient thickness is laminated on the tree 4 in this manner, the mold layer is dried for at least one day (drying step). Then, as shown in FIG. 9(e), the f-tree 4 covered with the mold layer is heated, and the wax in the mold layer melts and flows out to form the mold 6 (de-waxed). process). Then, before casting, the mold 6 is further heated (firing step). As a result, the chemical composition of the mold layer of the mold 6 changes and becomes hard. Then, before the heat cools down, the molten metal 7 is poured into the mold 6 (casting process), as shown in FIG. Since the molten metal 7 is poured in an L-shape, heat leakage is reduced and damage to the mold 6 is prevented. When the metal 7 in the mold 6 solidifies, as shown in FIG. 9(g).
As shown, mechanical vibration is applied to the entire mold 6 (
demolding process). Since the mold is hardened by the surface firing process, the mold is easily crushed by vibration and solidified, leaving only the metal. M1
Of the remaining metal, the metal rods corresponding to the wax rod-shaped portions 2b described above are cut by vibration to obtain individual products 8. Then, the completed state of the product 8 is inspected, and if there are any unnecessary protrusions on the surface, they are removed by a grinder or the like as shown in FIG. 9(h), and the product is finished to size (finishing process). Invention or Problem to be Solved Now, there has been a desire for a precision casting system that can automatically produce many types of products with different specifications. When realizing this kind of precision casting system, once the tree is coated,
Since it is impossible to identify the product based on the shape of the workpiece, etc., an identification code is attached to the holder such as a gun that transports the workpiece, and the identification code on the holder is read at each site after the coating process. A conceivable method is to identify the product of the workpiece and the final processing state of the workpiece, and perform various treatments on the workpiece according to the identification results. However, in the coating process, a slurry liquid is applied to the tree and sand is sprinkled on the tree, so there is a risk that the sensors that read the identification number of the holder may become dirty, making it impossible to read the identification number correctly. Therefore, if the identification number is not read correctly, the f2 process will be performed on the workpiece by mistake, resulting in a problem that a normal product will not be manufactured. The second invention was made in view of the above-mentioned circumstances, and the purpose is to provide a precision casting system that can solve the above-mentioned problems and automatically cast and produce two products with different specifications. There is. 7 Means to solve problems. This invention involves laminating a mold layer on a wax model of a product to be inputted as a workpiece, drying the mold layer, melting the wax in the mold layer to create a mold, and melting the wax in the mold. During operation, the precision casting system, which pours and solidifies raw materials and manufactures the products listed above, transports the input workpieces with optically readable identification codes attached using holders, and transports them to each location. Then, the reading means reads the identification code of the holder to identify the product and final processing state of the workpiece held in the holder, and performs processing on the workpiece corresponding to the identification results to identify the product. At the same time as manufacturing, at the start of operation or periodically during operation, an identification code reading operation is performed in the log reading means with the navigation retainer swiveled from the reading position. It is a feature. '-Operation According to the above configuration, the identification code of the holder is read at each location with the holder shifted from the reading position. Here, if each reading means is normal, a specific identification code is read, and if it is abnormal, an identification code different from the specific identification code is detected. In this way, maintenance tests for each reading means are performed. "Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to the drawings. (System Configuration) FIG. 1 is a system configuration diagram of a casting system according to an embodiment of the present invention. In Figure 1, CPO! is a network management computer and mediates information transmission within this system. In addition, this network management computer computer CPOI
is connected to a higher-level system such as a host computer at the head office via a public line N. The MOI is a storage device connected to the network management computer CPOI. CPO2 is a work progress management computer that collects the status of each work in progress in this system and stores it in the storage device MO2. Further, product manufacturing instructions for this system are input by operating the work progress management computer CPO2. CPO3 is a work plan input computer used to formulate product manufacturing plans for this system. A pre-processing process tracking control computer CPIl, a drying process tracking control computer CPI2, and a casting/post-processing process tracking control computer CP13 are connected to the network management computer CPOI. First, process-resistant process tracking control computer CPI
I will be explained. In this precision casting system, the wax molding process, assembly process, and coating process that are performed before the drying process are collectively called pretreatment work. And the pre-processing process tra-soking control computer CP1
1 is a first hanger conveyance control device CTL l, a second hanger conveyance control device CTL2, and a third hanger conveyance control device CTL which controls the conveyance of the workpiece in the pre-processing process.
3 and turntable control device CTL4 via a ring-type optical fiber transmission line LINKI. In addition, the pre-processing process tracking control computer CPI
I is coupled to input instruction terminal CP21 or via ring type optical fiber transmission line L[NKI. Further, the pre-processing process tracking control computer CP11 controls coating robots 1 to 3, which will be described later.
It is coupled to the third robot control device CT, L5 to CTL7 via a ring-type optical fiber transmission line LINK2 (
do. Then, the pre-processing process tracking control computer CPI+ controls each of these control devices CTL l to C.
Overall control of TL7 is performed. In the pre-processing process, each workpiece is held on a hanger and transported. Furthermore, each workpiece is transferred to a plurality of hangers. Here, when a hanger arrives at each location in the pre-processing process, its identification number is read and reported to the pre-processing process tracking control computer CPII, and when the workpiece is processed at each location. The report is then sent to the pre-processing process tracking control computer CPII. Then, in accordance with these reports, the pre-processing process tracking control computer CP11 collects product identification information (in the case of this embodiment, product manufacturing drawings) of the workpieces held in each hanger and the workpieces being processed at each site. Figure number),
Information such as the current final processing status of these works is managed. In this precision casting system, this information is called tracking information. Tracking information in the pre-processing process is stored in the storage device Mll. Note that details of the management of this tracking information will be described later. Connected to the drying process tracking control computer are a conhair control device CTL8 that controls the conhair Cv, and a three-dimensional warehouse relay device CTL9a. Furthermore, the multi-story warehouse relay device CTL9b is coupled to the stacker crane control device CTL9b via optical communication means. The drying process tracking control computer CP+2 is
Control information is sent to each of these devices CTL 9a and CTL 9b to drive the conveyor Cv and stacker crane, and the workpieces sent from the coating process are delivered to the multi-storey warehouse, and the works stored in the multi-storey warehouse are sent to subsequent processes. Issue the goods. Further, the drying process tracking control computer CPI2 manages tracking information such as product identification information, manufacturing instruction number, and warehousing time of the workpieces stored in the multi-story warehouse. This tracking information is stored in the storage device M.
It is stored in I2. Next, the casting/post-processing process tracking control computer C
P13 will be explained. With this precision casting system,
The process from the dewaxing process to the final process is collectively called the casting/post-processing process. The casting/post-processing process tracking control computer CP13 includes a casting work terminal CP31 for reporting the execution of casting, a noyot blasting terminal CP32 for reporting the execution of Noyoto blasting, and a reporting of the input of raw materials into the melting furnace. Nime raw material input terminal CP3
3 is connected. The storage device M l 3 contains casting and
Information such as the final processing state of each workpiece in the post-processing process is stored as tracking information. The casting/post-processing process tracking computer CPI3 is connected to each terminal CP31-C.
Based on the report from P33, the tracking information of each work stored in the storage device M I 3 is updated. (Production Factory Layout) FIG. 2 is a layout diagram showing an example of a production factory using this precision casting system. As shown in the figure, the interior of this production factory is divided by walls into five floors F1 to F5, with floor Fl assigned to the wax molding process and assembly process, and floor F2 (coating process). The floor F3 is assigned to the drying process, and the floor F4 is assigned to the casting/post-processing process from the dewaxing process to the finishing process. Also,
-=7F 5 is used as a control room. Below, each facility installed in 670A F1 to F5 will be explained.

[70A Fl (wax molding process, assembly process)] First,
On the floor F1, there are installed a wax molding machine WX for manufacturing wax models of products, an assembly work table TBL for assembling the wax models and assembling the '4 ffl tree, and the above-mentioned input instruction terminal CP21. . Product manufacturing instructions are sent from the work progress management computer CPO2 to the input instruction terminal CP21 via the network management computer CPOI, pretreatment process tracking control computer CPII, and optical fiber transmission line LINKI. The manufacturing instructions sent in this manner are then displayed on the display device of the input instruction terminal CP21. When an operator manufactures a product tree according to the displayed manufacturing instructions and submits it to the coating process, the operator operates the input instruction terminal CP21 to report the input instruction. Moreover, a hanger conveyance rail L is laid on this floor F1. As shown in FIGS. 3(a) and 3(b), a large number of hangers) I, H, · are movably attached to the hanger transport rail L1, and each hanger HH1...
An L number plate (not shown) is attached to the hanger so that the operator can visually identify the hanger number. In addition, grooves HLa and HLb are formed in the bottom surface of the workpiece holding portion HLD of each hanger H, H, etc. from the front to the back in FIG. 3(a), and these grooves HLa Trees 111J and 111J of trees manufactured by workers are attached to HLb and HLb, respectively. The upper part of the work holding part HLD is connected to the load bar LDH, and the upper part of the load bar LDH is equipped with casters CAS.
I, CAS 2 is connected. The distal ends of the casters CASI and CAS2 are housed within the transport rail L, and a roller R rotatably attached to the distal end is in contact with the lower inner wall of the hanger transport rail L. Hanga H, H. ... are each engaged with a chain not shown,
Under the control of the first conveyance control device CTLI described above, each of the shells H, H is driven via a chain. Then, by rotating the roller R, the bunkers H, H, . . . are moved L along the hanger conveyance rail L1. 2, each hanger H, H,... is a work holding IHL
A code plate HC is provided above the DD. This code number HCi
The two points P l = P ei that correspond to the hanger number are the identification codes of the 8 people corresponding to the hanger numbers. , as shown in FIG. 4, hanger number league PH1, workpiece detection sensors PH2a and P
H2b, a read timing sensor 5ENI, and an arrival sensor 5EN2 are provided. Hanga number league P
In H1, eight light beams are output from the light emitting section, and each light beam is detected at the light receiving section. To explain in more detail, when the identification code of the hanger H is read, the eight beams of light output from the light emitting part have the code IHc.
By determining whether or not each beam light is received by the light receiving section, it is possible to identify the presence or absence of holes HH located at points P to P8. The coat is read and the first hanger conveyance control device CTL! sent to. This identification code is read in synchronization with a read timing pulse detected by the bunker H7>\read timing sensor 5ENI and generated in this case. The hanger H whose identification code has been read is then detected by the arrival sensor 5EN2, and as a result, the first hanger transport control device CTL1
The hanger H is controlled to stop, and the hanger H is stopped at the stopping point ST. Then, the number of the hanger H is the first hanger conveyance control device C.
Process-resistant process tracking control computer C from TLI
Sent to PII. Note that similar hanger number leagues, workpiece detection sensors, etc. are also installed at point S on the hanger conveyance rail L1 and at points S and ~SI+ on the floor F2, which will be described later. In addition to the above-mentioned sensors, a barcode league is installed at point S1. Tree II n: Yo-1 n force transport rail L! Nithi-
and transported to the input port ENT, inside floor F2,
It is put into the co-coating process. In addition, the tree HR to be input into the coating process is cleaned using a cleaning device.

[Floor F2 (Coating Process)] Floor F2: There are several stages of closed-loop hanger transport rails L and F3 for transporting workpieces. Here, each hanger is attached to the hanger transport rail L2;
2 controls its movement. (1) The movement of each of the hoisting forces attached to the hanger conveyance rail L3 is controlled by the aforementioned third hanger conveyance control device CTL3. Each hanger transport rail L2. Along L3 from point 53 to S I+: Yo,
Sensors such as a hanger number league and a workpiece detection sensor similar to those for Point SI are installed, and each time a hanger passes through each point, the number of the hanger and the number of workpieces hung on the hanger are detected. and is sent to the 5/9F second pre-processing process tracking control computer CP11 located within the floor F2 via the second hanger conveyance control device or the third hanger conveyance control device. In addition, the hanger conveyance rail L2. Hanger attached to L3 and each rail: Since each of these has the same structure as the above-described hanger transport rail L and hanger H, a description thereof will be omitted. Second, on the floor F2, a coating robot #I-3 is placed which performs a coating process on a workpiece. Coating robot #Summer performs the coating process for the first and second layers, as well as the input point ENT
The waiting tree HR is removed from the hanger of the hanger transport rail L and taken into the floor F2, and the coating work is removed from the hanger of the hanger transport rail L2 and attached to the hanger of the hanger transport rail L3. Automatic door DR is from floor F1 to tree HR
The door is controlled to open only during the intake period. Coating robot #2 not only performs the coating process from the third layer to the final layer, but also mounts the workpiece that has been coated on the final layer onto the turntable TNT, and removes the workpiece from the turntable TNT and places it on the floor 3. The process of placing the paper on the conveyor Cv inside is performed.
Coating robot #3 is coating robot #3.
This is a backup robot that is used in case of overload. Here, switching whether the coating process is performed by robot #2 or robot #3 is performed by switching the conveyance destination of the hanger at branch points BRKI and BRK2. [Floor F3 (drying process)] Floor F3 has a multi-level warehouse S for drying and stocking coated workpieces transported from floor F2.
TK is installed. Further, a conveyor Cv and a stacker crane (not shown) are provided, which are driven when loading workpieces into the multilevel warehouse STK and when unloading the workpieces from the multilevel warehouse STK. Also, floor F
3 is installed with the aforementioned drying process tracking control computer CPI2 and storage device M12.

[Floor F4 (Dewaxing process ~ Finishing process)] Floor F4
includes a dewaxing furnace R1, a firing furnace R2, a casting process R3, a melting furnace R4, a reduction conveyor R5, and a Noyonoto blasting furnace R2.
6 are placed respectively. The above-mentioned casting/post-processing process tracking control computer CPI3 is installed on floor F6.
, casting work terminal CP31, Noyot blast terminal CP3
2 and a raw material input terminal CP33 are installed.

[Floor F5 (Control Room)] On the floor F5, the aforementioned network management computer CP01, work progress management computer CPO2, and work plan input computer CPO3 are installed. (Operation) The operation of this precision casting system will be explained below. When the production manager in this production factory operates the operation panel of the work progress management computer CPO2 and inputs manufacturing instructions for the desired product, the input manufacturing instructions are sent to the network management computer CPol, the pre-processing process tracking control computer Input instruction terminal CP via CPI+
Sent to 2+. Then, for example, on the display device of the input instruction terminal CP2+,
'As shown in Figure 5(a), up to this point, human power of 5C
f: The contents of the manufacturing instructions are displayed. Specifically, as shown in the same figure, the instruction number of the production drawing of the specified product is assigned by the work progress management computer CPO2. ,
Product name or its abbreviation (product name abbreviation), designation of wax molding machine number (“machine”), number of pieces to be manufactured (“instruction number”), number of pieces that have already been input into the coating process at this time. ”), “remaining instructions for scattering that have not been put into the coating process at the moment”), etc.Furthermore, in the function display area ARI at the bottom of these display areas, function keys FC1, FC2, ・・
・Corresponding to the sequence of , the function of each function key is displayed (“Turn on,” “Help to analyze”, etc.). Then, the above display is confirmed by the operator, and the following is done.
The wax model corresponding to the product is manufactured and the tree is assembled as described. First, as shown in FIG. 3, a mold KN corresponding to the product is attached to the wax molding machine Wx by an operator. Then, the wax molding machine WX is started, and in the wax molding machine WX, the melted wax is closed and molded into two molds K.
The operation of injecting N and the operation of opening the mold and discharging the solidified wax model WM are repeated. And the wax models WM, WM,... are the wax molding machines W
The water is discharged into the water tank WAT located at the bottom of the water tank W.
The tray TR is carried out by the conveyor CvW from the AT.
are accumulated in On the assembly table, a model support rod HW consisting of eight metal rods SK covered with a thick wax layer SW is prepared in advance. Several trowels (not shown) are prepared. The worker takes out the wax models WM, WM,... in the tray TR one after another and attaches the rod-shaped part W for connection.
Melt the end of M a with a soldering iron and attach it to the model support rod I-
(Glue it to the wax surface of W. In this way, the predetermined number of wax models WM, WM, and model support rod HW are integrated, and the tree HR is completed. Information showing the relationship between the number of pieces and the number of trees required to obtain it is summarized for each product and placed in an L-list, and workers can select the required number of trees by looking at this list. -Produce an IR. Then, the worker presses the function key PCI,
Start the input processing program. As a result, the message shown in FIG. 5(b) is displayed in the message display area AR2 of the display screen. Then, the operator selects the manufacturing instruction for the product to be input into the coating process, moves the cursor to the display position of the manufacturing instruction, and presses the execution key. As a result, the fifth message is displayed in the message display area AR2 of the display screen.
The display shown in Figure (c) is performed. In this display, the number of items means the number of trees to be hung on the hanger. Also, "first hanger N013°" is an instruction to hang the tree to be put in this time on a series of hangers starting from hanger number 13. If you select a manufacturing instruction with the number "000I" and the manufacturing instruction number "9COO Summer" and enter "10" as the number of items to be input, 5 hangers starting with the first hanger number "13" will be manufactured. Instruction number “
9COOI”1 Product tree with figure number “0001” is 2
Information indicating that books will be hung one by one is sent to the preprocessing process tracking control computer CP11. Then, for each hanger with hanger numbers "13J" to "17", the pre-processing process tracking control computer CPII
Product identification information of the work to be hung (in this case, the drawing number “00”
01''), product manufacturing instructions (in this case, 9COOI''), and the number of workpieces to be hung (in this case, 2), tracking information is created and written to the storage device M11. Next, the operator presses the function key FC2 to start the new label issue processing program. Then, the work back is displayed, and from among the f2 manufacturing instructions, select the manufacturing instruction corresponding to the current workpiece 6) to be input, move the cursor to the displayed position, and press the execution key. As a result, a message asking about the required number of labels is displayed on the display device R2, and the operator inputs the number using the numeric keypad and presses the execution key. As a result, in accordance with the selection of the above manufacturing instructions, a barcode of the product's identification coat is printed by a barcode printing device (not shown), and the specified number of labels V with the barcode printed are issued. be done. Then, the operator sequentially attaches the tree HR to the nozzle H according to instructions from the input instruction terminal CP21, and affixes a label printed with a barcode for product identification to the tree HR. Hold hanger H or tree HR, move along hanger transport rail L, and reach point S.
The hanger number of hanger H is read and the tree H
Detect the number of H. The read f number and the number of works are transferred to the first number transfer control device CTL.
Pre-processing process tracking control computer CP via
Sent to II. Then, the pre-processing step tracking control computer CPI+ selects the one corresponding to the hanger number I from among the tracking information stored in the storage device Mll. Then, based on the drawing number, manufacturing instruction number, and number of works written in the tracking information, tracking information corresponding to the cleaning device CL is created and written to the storage device Mll. Also, at point S, it is determined whether the number of detected trees HR matches the number of works stored as tracking information or not. An error message indicating the mismatch will be displayed with the appropriate hanger number and the hanger will stop running. Furthermore, at point SI, the barcode on the label attached to the tree HH is read by the barcode league, and the surface treatment process tracking control computer CPII
sent to. Then, in the moe processing process tracking control computer CPII, the product identification information is compared with the tracking information, and it is determined whether or not there is a contradiction in the product identification information. If there is a contradiction, it is displayed. In this case, the hanger will stop running. After the tree HR is cleaned at point S1, it passes through point S2, the hanger number and the number of works are detected, and the input point E N T to the floor F2 is detected.
Stop and wait. Then, the hanger number and number of works detected at point S are sent to the preprocessing process tracking control computer CP2+. And pre-processing process tracking control computer CP1
1, the tracking information corresponding to the sent hanger number is selected. Then, it is determined whether the number of works in the tracking information and the number of works detected at point S2 are consistent, and if they are inconsistent, an error message is displayed and hanger movement is stopped in the same way as described above. . Furthermore, tracking information corresponding to the input point ENT is created based on the drawing number, manufacturing instruction number, and number of works written in the selected tracking information, and is written into the storage device ~flli:. In addition, at other points S3 to S11, as in the case of points S, S, the hanger number and the number of works are detected and compared with the tracking information, and if a discrepancy is detected, Hanger transfer is stopped and an error message is displayed. A hanger that does not hang a workpiece is detected at point S of hanger transport rail L on floor F2, and
When the coating robot #1 becomes empty, the automatic door DR is opened, and the tree HR waiting at the input point ENT on the floor Fl is taken into the floor F2 by the coating robot #I. When this loading is completed, the automatic door DR is closed, and each hanger H, H attached to the hanger conveyance rail L1. ... is driven and moves the distance of one hanger. In addition, along with the above operation, the first obot control device CTL
5 to Moe treatment process tracking control computer CP1
1, information indicating that the work has been taken in from floor F1 is sent. Then, the pre-processing process tracking control computer CP11 reads the tracking information of the workpiece at the input point ENT from the storage device Nfl+, and based on the L drawing number, manufacturing instruction number, and number of works described in the tracking information, the coating robot=I Tracking information corresponding to is created and written to the storage device M11. Further, the tracking information corresponding to the above-mentioned input point ENT and the tracking information corresponding to the bunker stopped at the input point ENT are deleted. And pre-processing process tracking control computer CPII
From there, robot operation information (hereinafter referred to as robot pattern) recorded in the tracking information and corresponding to the f2 figure number is sent to the tenth robot control device CTL5 that controls coating robot=1. The coach-in bot=1 that has taken in the workpiece from the floor F1 is controlled by the 10th bot control device CTL5, and performs the first layer coating process, which will be explained below. So, work HR,
Immerse it in the slurry liquid tank SL for a predetermined time. After that, work HR
, HR are taken out from the slurry liquid flsL and rotated a predetermined number of times. Next, as shown in FIG. 7(b), the work HR
, HR is carried under the sand outlet 5AND, sprinkled with sand, and rotated a predetermined number of times. Then, the workpiece HRHR is attached to the empty hanger whose hanger number is read and detected at the above-mentioned point S3. Then, the fact that the workpiece has been moved from the coating robot #1 to the stopped hanger at point S3 is sent from the tenth bottle control device CTL5 to the processing process tracking control computer CP11. Then, the pre-processing process tracking control computer CP11 determines the point S3 based on the drawing number, manufacturing instruction number, and number of works described in the tracking information corresponding to coating robot #1.
Tracking information corresponding to the stopped hanger is created and written to the storage device M11. However, in this case, the final treatment status information, drawing number, manufacturing instruction number, etc. indicating that the first layer of coating has been applied to the work,
The number is added to the number and recorded as tracking information. And coach interrobot =
1 or workpiece, respond to f- with χ, and delete the tracking information corresponding to coach interrobot #1. Thereafter, each time a workpiece is moved, a report of the movement of the workpiece is sent to the pre-processing process tracking control computer CPII, and one piece of tracking information corresponding to the base or location before movement is sent to the destination. The trasokinogu information is created. Then, in the pre-processing process computer CPII, based on the tracking information stored in the storage device MII, as shown in FIG. the hanger), the drawing number of the workpiece hung on the hanger), the manufacturing instruction number corresponding to the workpiece (“
The processing status of the workpiece is displayed (if it is processed normally, "processed" is displayed), etc. The workpiece that has completed the first layer coating is then transferred to the hanger transport rail. It is transported along L. Then,
This work reaches point S2 again after a predetermined time has elapsed, and the hanger number of the hanger holding this work and the number of works are determined by the pre-processing process tracking control computer CP.
Sent to II. Then, the tracking information corresponding to the hanger is referred to by the pre-processing process tracking control computer CP11, and a detailed robot pattern for performing the second layer coating process is sent to the tenth hot control device CTL5. Then, as in the case of the first layer, a second layer coating process is performed on the workpiece by the tenth pot control device. On the other hand, on the hanger transport rail L, point S. . If an empty hanger on which no work is hung is detected at , and no empty hanger is staying at point S11, the hanger transport destination at branch point BRK3 is switched to point SII. 9) Yo7. By doing knee J-, you get a lot of points S
If there is an empty hanger in II, it will be full. Then, the second 'M' is applied by the coating robot=1.
The workpiece which has been subjected to the ink treatment is attached to a hanger staying at point S II. Also, two p.
-(This 11(d) is stopped at point S1, and corresponding tracking information is created at point S1. The final coating state information indicating that the coating has been applied is written therein.Then, after finishing the coating process, the workpiece moves along the hanger conveyance rail L3 and reaches point S4 after a predetermined period of time has elapsed. Normally, the hanger transport destination at the branch point BRKI is on the side of point S, and the L workpiece passes through point S4 and reaches point S.Then, the hanger number is read at point S5 and the pre-processing process is carried out. It is sent to the tracking control computer CPIl and read by the preprocessing process tracking control computer CP11.
You will be asked for tracking information that corresponds to your et\ing number. The product identification information and final processing state in the tracking information are then referenced. And in this case,
The robot pattern necessary to perform the third layer coating process on the product is sent to the 20th bot control device CTL6, and the coating process is performed by the coating robot=2. Then, the workpiece that has been coated with the third layer is attached to the original hanger staying at point S, and proceeds to point S7. Usually, the branch point BRK
The branch destination of 2 is on the side of point S, and the work passes through point S and goes to point S. Proceed to. Then, it moves on the hanger transport rail L and reaches point S again via point S4. Then, the fourth layer coating process is performed on the workpiece by the same operation as described above. Thereafter, the coating process up to the final layer is performed in the same manner. Please note that coating robot #2 is overloaded.
If coating robot #3 is available, branch point B
By switching the RKI hanger transfer destination to point S6, the hanger holding the workpiece or point S6
It is transported to point S7 via the route. And the turning point BR
The hanger transport destination of K2 is switched to the point S8 side,
The workpiece is guided to point S, and coach ink processing is performed by coating robot #3. When the coating process for the final layer is completed and reaches point S, the coating robot #2 applies only the slurry liquid to the work and places it on the turntable TNT. In this case, the mounting position on the turntable TNT to which the work is mounted is point S.
It is detected by the tine table position detector installed at +Z, and the correction process tracking control computer CP
II, and the tracking information is updated as before. Then, the workpiece attached to the turntable TNT is
The slurry liquid is left for a predetermined period of time to dry, and then coated on the turntable T by coating robot #2.
It is removed from the NT, placed on the compare CV, and guided into the floor F3. At this time, the turntable TNT
The tracking information of the workpiece removed from the process is sent from the process-resistant process tracking control computer CP11 to the drying process tracking control computer CP+2 via the network control computer CPOI. The drying process tracking control computer CPI2 has a storage device M! From the tracking information stored in F2, the address of the vacant storage area in the multi-story warehouse STK is obtained, and in order to store the work sent from the floor F2 in the area, the conveyor control device CTL 8 and the multi-story warehouse relay device CTL9b Send control information to. As a result, the workpieces sent from the floor F2 are stored in the storage area. In addition, the above-mentioned network management computer C
From the tracking information sent from the POI, the drawing number and manufacturing instruction number of the work in the warehouse are obtained, and information such as the address of the storage area and the time of warehousing are added to this information, and the tracking information of the work in the warehouse is stored in the storage device M. ! 2 is stored. When the work progress management computer CPO2 is operated and a casting instruction is given manually, the casting instruction is sent to the casting/post-processing process trasokink computer CP13 via the network control computer CPQI and displayed. After confirming the casting instructions, the worker operates the casting/post-processing process tracking control computer CPI3 to manually input the drawing number of the corresponding product, and then unloads the corresponding workpiece from the three-dimensional warehouse on floor F3. Make a request. This shipping request is sent to the drying process tracking control computer CPI2 via the network management computer CPO1. As a result, the drying process tracking control computer CP
I2 searches the tracking information stored in the storage device ~112, and it is determined that the drawing number matches the shipping request and that drying has been carried out in the multi-story warehouse STK for more than a predetermined time calculated from the storage time. Find the tracking information of the workpiece ψ) -T↓+, -MJJIknIJA
,,trq-h answer p is sent to the casting/post-processing control tracking computer CPI3 via the computer CPOI and displayed on its display device. The worker is not displayed.
The user selects the desired workpiece information from among the pieces of information, operates the casting/post-processing process tracking control computer CPI3, and instructs the workpiece to be delivered. When this unloading instruction is sent to the drying process tracking control computer CPI2, control information is sent to the multilevel warehouse relay device CTL9b and the conveyor control device CTL8, and the workpiece is transported by the stub cuff lane and conveyor CV and guided to the floor F4. It will be destroyed. Here, the tracking information of the shipped work is stored in the drying process tracking control computer CP.
Eliminated by +2. Then, the workpiece is placed in a dewaxing furnace R1 by an operator, and the wax in the mold layer of the workpiece is melted. Then, the workpiece from which the wax has been removed is taken out from the dewaxing furnace R1 and put into the firing furnace R2, the mold is taken out from the firing furnace R2, and the casting pressure is 〒-r+Q+-'k,
-4qpu Ll-柟敠υ纅DAa\ni The molten material is supplied and casting is performed. The operator then operates the casting work terminal CP31 and reports that the instructed product has been cast. After completing the casting process R3, the workpiece is conveyed by a reduction conveyor R5 and sent to a shot blasting process R6, where the mold is crushed and separated. The operator then operates the soyacht blasting terminal CP32 to report the shot blasting process. The product obtained in the shot blasting step R6 is sent to a finishing step where unnecessary protrusions and the like are removed, and then stored in a product warehouse. Further, the casting/post-processing process tracking control computer CP13 updates corresponding tracking information based on the implementation report of each process from the casting work terminal CP31 and the shot blasting terminal CP32. In this precision casting system, from the work progress management computer CPO2, the preprocessing tracking control computer C
PII, drying process tracking control computer CP
I2 and the casting/post-processing process tracking control computer CP13 are periodically polled.
Tracking information for each process is collected by the work progress management computer CPO2 and stored in the storage device MO2. Then, for example, the collected tracking information is aggregated for each manufacturing instruction number, and the production manager confirms the in-process status of each process of the product for which manufacturing instructions have been given. Additionally, when the head office requests this production factory to report on the progress of manufacturing, the information to be reported is created based on the tracking information stored in the storage device MO2, and the network management computer CPOI and The data is transferred to the host computer at the head office via the public line N. (Maintenance Test) As described above, in this precision casting system, the product identification information and final processing state of each workpiece are saved by reading the hanger number at each site where the workpiece is moved. Therefore, it is necessary to ensure that the hanger number is always correctly read. Therefore, in this precision casting system, maintenance tests of hanger number leagues at points SI to S11 are performed as described below. In the case of this precision cast stem, each hanger is designed to stop at a position offset from points S to S11 at the start of operation. Therefore, in this state, a reading test of the hanger number league at each point is performed. In this case, if the hanger number league PH1 is normal, all eight beams of light output from the light emitting section will reach the light receiving section, and an 8-bit all "I" identification code will be obtained. However, if the optical axis of any of the beams is bent in an abnormal direction, or if the surface of the light receiving section is contaminated, an identification code other than 8-bit all "l" will be obtained. Therefore, by determining the identification code, it is possible to determine whether or not the hanger number league is normal. Also, even during operation, a reading test of the Nonga number league is conducted periodically. In this case, in FIG. 4, the hanger number is read at the timing when the hanger H is detected by the arrival sensor 5EN2. If there is an error as a result of the above maintenance test, an error message is displayed together with the point where the error was detected on the display device of the pretreatment process tracking control computer CpH. The maintenance personnel then checks the display, goes to the location of the error, and cleans, replaces, etc. the hanger number league. [Effect of the Invention J As explained above, according to the present invention, during operation, the workpieces that are thrown in are held and transported by a holder with an optically readable identification code, and each location The means reads the identification code of the holder to identify the product and final processing state of the workpiece held in the holder, and processes the workpiece in accordance with the identification results to manufacture the product. At the same time, at the start of operation or periodically during operation, the identification code reading operation in the reading means is performed with the holder shifted from the reading position, so that maintenance of the reading means or the line 1 specification is not required. It is possible to produce many products that have become hazy automatically and reliably without processing errors.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram of a precision casting system according to an embodiment of the present invention, FIG. 2 is a layout diagram of a production factory according to the same embodiment, and FIG. Figure 4 shows hanger number league P H1 and workpiece detection sensor P in the same embodiment.
H2a, PH2b, reading timing sensor 5ENI, and arrival sensor 5EN2; FIG. 5 is a diagram showing a display example of the display device of input instruction terminal CP2+ in the same embodiment; FIG. 6 is a diagram showing the wax molding process and FIG. 7 is a diagram explaining the assembly process, FIG. 7 is a diagram explaining the processing performed by coating robot #l in the same embodiment, and FIG. 8 is a display example of the display device of the pre-processing process tracking control computer CPII in the same embodiment. diagram showing,
FIG. 9 is a diagram illustrating a general lost wax casting procedure. CPll...Pre-processing process tracking control computer, CP+2...Drying process tracking control computer, CP+3...Casting/post-processing process tracking control computer, CF3I...Input instruction terminal, CT L, I...・First hanger transfer control device, C
TL2 2nd hanger transfer control device, CTL3/3rd hanger transfer control device, CTL4...Turntable control device, CTL5...10th bot control device, CTL6...20th bot Control device, CTL7・
...30th pot control device, CTL8...Conveyor control device, CTL9a...3D warehouse relay device, CT
L9b... Stacker crane control device, #l~#3
...Coating robot.

Claims (1)

[Claims] A mold layer is formed by laminating a wax model of a product to be input as a workpiece, the mold layer is dried, the wax in the mold layer is melted to create a mold, and the mold is In a precision casting system that manufactures products by pouring molten raw materials and solidifying them, during operation, the workpieces that are put in are held and transported by holders with optically readable identification codes, and transported to each location. Then, the reading means reads the identification code of the holder to identify the product and final processing state of the workpiece held in the holder, and performs processing on the workpiece corresponding to the identification results to identify the product. A precision casting system characterized in that, in addition to manufacturing, the reading means performs an identification code reading operation at the start of operation or periodically during operation with the holder shifted from the reading position.