CN109828542B - Production control method, system and device based on discrete workstation - Google Patents
Production control method, system and device based on discrete workstation Download PDFInfo
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Abstract
The invention provides a production method, a system and a device based on a discrete workstation, relating to the technical field of automobile production, wherein the system comprises the following steps: the device comprises a workstation, a clamp library and a material library; the fixture library is used for storing the fixture; the material warehouse is used for storing parts required by production; the tool clamp and the part are respectively provided with an identification RFID tag; the workstation comprises an RFID reader-writer; the workstation is used for controlling the RFID reader to identify the RFID label of the tool clamp or the part when the tool clamp or the part is transported to the workstation; the workstation is also used for judging whether the information stored in the RFID label of the tool clamp or the part is matched with the current production plan, and when the information is matched with the current production plan, the current production plan is executed. The embodiment of the invention can realize independent information transmission and collaborative production of each standard workstation, the fixture library and the part library, effectively shorten the automobile manufacturing period and reduce the production cost.
Description
Technical Field
The invention relates to the technical field of automobile production, in particular to a production control method, a production control system and a production control device based on a discrete workstation.
Background
At present, in order to meet the personalized customization requirements of consumers, many automobile manufacturers actively research and explore technologies of cross-platform multi-vehicle type flexible mixed line production, but most of the technologies are still characterized in that different vehicle type clamps are added in a line body through space expansion, and a production mode of the production line cannot be really separated. The production mode of the library card matrix type discrete standard workstation breaks through the existing production line type production mode, is a brand new high-flexibility production mode, separates general equipment from a special tool by establishing the discrete standard workstation, and realizes tool clamp switching of each workstation and material transmission between workstations by an AGV (automatic Guided Vehicle).
Due to the diversification of automobile products, multi-platform multi-vehicle type mixed line production is required, and a work station needs to frequently switch a tool clamp; the characteristic requirement of the discrete workstation is high flexibility conveying system, and the material transmission between workstations is realized. The challenge facing manufacturers of automobile body lines is how to realize independent information transmission of each standard workstation, the fixture library and the part library as accurately as possible at the lowest cost under the same grade of brands, and realize the cooperative production of each system.
Based on the production mode of the automatic line discrete type workstation, the universal equipment is separated from the special tool to form an independent workstation, a fixture library and a material library system. Each System independently completes work according to a production plan, a fixture scheduling and a material putting plan issued by a Manufacturing Execution System (MES). But all the systems are closely connected and are all produced in a gathering mode in a workstation, and when the systems work uncoordinately, the problems that tooling equipment is damaged and production is stopped can occur.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a production control method, system and device based on a discrete workstation, which can achieve independent information transmission among standard workstations, a fixture library and a part library, and cooperative production among systems, thereby shortening the manufacturing cycle of automobiles and reducing the production cost.
In a first aspect, an embodiment of the present invention provides a discrete workstation-based production system, including: the device comprises a workstation, a clamp library and a material library; the fixture library is used for storing the fixture; the material warehouse is used for storing parts required by production; the tool clamp and the part are respectively provided with an Identification RFID (Radio Frequency Identification); the workstation comprises an RFID reader-writer; the workstation is used for controlling the RFID reader to identify the RFID label of the tool clamp or the part when the tool clamp or the part is transported to the workstation; the workstation is also used for judging whether the information stored in the RFID label of the tool clamp or the part is matched with the current production plan, and when the information is matched with the current production plan, the current production plan is executed.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the workstation is further configured to control the RFID reader to write state information to the RFID tag of the sled.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the workstation is further configured to, when the skid arrives, read state information stored in an RFID tag of the skid, determine whether the state information matches the current production plan, and, when the state information matches the current production plan, execute the current production plan.
With reference to the first aspect and one of the first to second possible implementation manners of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the RFID reader includes a high-frequency RFID reader and an ultrahigh-frequency RFID reader; the high-frequency RFID reader-writer is used for reading an RFID label of the tool clamp; and the ultrahigh frequency RFID reader-writer is used for reading the RFID label of the part.
With reference to the first aspect and one of the first to the second possible implementation manners of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the fixture library is further configured to receive a fixture scheduling plan sent by the manufacturing execution system, and perform fixture moving according to the fixture scheduling plan; the fixture library is also used for feeding back AGV transportation request information to the manufacturing execution system after the fixture is moved to the library.
With reference to the fourth possible implementation manner of the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the RFID reader is configured to read the vehicle type identification information of the RFID tag of the fixture, and send the vehicle type information to the controller of the fixture library.
In a second aspect, an embodiment of the present invention further provides a production control method based on a discrete workstation, which is applied to the workstation, and the method includes: when the tool clamp or the part is transported to the workstation, controlling the RFID reader to identify the RFID label of the tool clamp or the part; judging whether the information stored in the RFID tag of the tool clamp or the part is matched with the current production plan; if so, the current production plan is executed.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the method further includes: controlling an RFID reader-writer to write state information into an RFID label of the skid; the status information includes at least one of: a workstation serial number, bill of material information, a special designation number or a workstation state number; the skid is used for bearing the part.
With reference to the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where the method further includes: when the skid arrives, reading state information stored in an RFID (radio frequency identification) tag of the skid; judging whether the state information is matched with the current production plan; and executing the current production plan when the state information is matched with the current production plan.
In a third aspect, an embodiment of the present invention further provides a production control device based on a discrete workstation, which is applied to the workstation, and the device includes: the reading module is used for controlling the RFID reader-writer to identify the RFID label of the tool clamp or the part when the tool clamp or the part is transported to the workstation; the judging module is used for judging whether the information stored in the RFID label of the tool clamp or the part is matched with the current production plan; and the execution module is used for executing the current production plan if the current production plan is the production plan.
The embodiment of the invention has the following beneficial effects:
the production method, system and device based on the discrete workstation provided by the embodiment of the invention comprise the following steps: the device comprises a workstation, a clamp library and a material library; RFID readers are arranged in a clamp library and a material library; when the fixture or the part is conveyed to the workstation, the RFID reader-writer identifies the RFID label of the fixture or the part and judges whether the RFID label is matched with the plan, so that independent information transmission and collaborative production of each standard workstation, the fixture library and the part library are realized, the automobile manufacturing period can be shortened, and the production cost is reduced.
Additional features and advantages of the present disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the above-described techniques of the present disclosure.
In order to make the aforementioned and other objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a layout structure of a side wall body RFID provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a discrete workstation-based production system according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of switching of a tool clamp according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of information transfer between workstations according to an embodiment of the present invention;
FIG. 5 is a flowchart of a discrete workstation-based production control method according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart illustrating part identification according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a production control device based on a discrete workstation according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With the development of social economy, people pursue higher and higher substance life, the humanization demand is more and more prominent, and the world automobile starts to convert from mass production line type production to mass customized production. In the future automobile development, the personalized customized production technology of the automobile body becomes the core competitiveness of various global automobile production enterprises for defeating opponents. Currently, based on the current industry 4.0 large background, the Customer-to-factory (Customer-to-factory) model of Customer-to-factory direct dialogue will become the mainstream, and the C2M will enable the Customer's personalized customization needs to be fed back to the car manufacturer at the lowest cost, in the shortest cycle, and more accurately.
At present, traditional stand survival mode based on automatic discreteness exists the condition of many models collinear production, and anchor clamps inventory needs to carry out the motorcycle type and frequently switches at a large amount of motorcycle type anchor clamps promptly, and traditional mode is: the automobile type clamps are distinguished through the proximity sensor combination structure, but the automobile type clamps must be fixed in the storage position, and along with the improvement of the flexibility requirement of the automatic wire body and other reasons, the storage method for fixing the storage position cannot meet the requirement of a high-flexibility production line. The reader-writer in the traditional technology adopts the ultrahigh frequency RFID reader-writer, can realize remote reading, has large installation space redundancy, can meet the requirement of simultaneously reading a plurality of labels, but has more factors influenced by the surrounding environment, for example, human bodies or water-containing objects can absorb certain radio frequency, so that the bodies of workers can influence the reading and writing effect of the workers, thereby influencing the line rhythm. And the metal piece has a reflection function on the ultrahigh frequency radio frequency, namely the RFID reader-writer cannot penetrate through the metal piece during reading and writing, so that reading is invalid. In addition, the UHF reader/writer is very expensive.
Aiming at the problems of high cost, short period, inflexible storage of storage space, large influence of ultrahigh frequency on environment and the like, no effective scheme is provided at present to solve the problems.
Based on the above, the embodiment of the invention provides an information transmission method and system based on an RFID vehicle type, which adopts a library card matrix type discrete standard workstation mode, separates general equipment from a special tool by establishing a discrete standard workstation, realizes tool clamp switching of each workstation and material transmission between workstations by an AGV, shortens the vehicle manufacturing period, and reduces the production cost.
For the convenience of understanding the present embodiment, the overall layout of the RFID according to the embodiment of the present invention will be described first. Taking the layout of the RFIDs on the side wall body as an example, referring to the layout structure schematic diagram of the RFIDs on the side wall body shown in fig. 1, the layout of the RFID reader-writer at the station of the fixture library is shown in the drawing, an A, B, C, D, E, F, H vehicle-shaped fixture library, BSL010, BSL020, BSL030, BSL040, BSR030, BSR040 elevators are arranged in the drawing, and the RFID reader-writers are arranged in each fixture library and at the loading ports of each elevator, and are used for reading the information of each fixture in the fixture library when the fixture is scheduled.
To facilitate understanding of the present embodiment, a detailed description will be given of a discrete workstation-based production system provided in the present embodiment.
Example 1
The embodiment of the invention provides a production system based on a discrete workstation, which comprises: the device comprises a workstation, a clamp library and a material library;
referring to fig. 2, a schematic diagram of a discrete workstation-based production system is shown, in which a workstation 21, a fixture library 22 and a material library 23 are shown, wherein the fixture library 22 is used for storing tooling fixtures; the material storage 23 is used for storing parts required by production; the tool clamp and the part are respectively provided with an identification RFID tag;
the workstation 21 includes an RFID reader; the workstation 21 is used for controlling the RFID reader to identify the RFID label of the tool clamp or the part when the tool clamp or the part is transported to the workstation;
give new motorcycle type production plan to workstation under MES, give anchor clamps dispatch plan respectively simultaneously and throw the material plan to anchor clamps storehouse 22 and material storehouse 23, anchor clamps storehouse 22 accepts the scheduling instruction after, at first moves the storehouse, sends AGV transportation demand to MES after moving the storehouse and accomplishing, and MES gives the AGV dispatch and appoints, and AGV carries new motorcycle type anchor clamps to workstation 21, and this workstation 21 passes through the label on the high frequency RFID read write line discernment frock clamp afterwards. Meanwhile, after receiving the feeding plan, the material warehouse 23 completely clamps the assembly part to the workstation clamp, and starts the ultrahigh frequency RFID reader to read the label information on the part.
The RFID reader-writer comprises a high-frequency RFID reader-writer and an ultrahigh-frequency RFID reader-writer. And (4) considering the distance of the RFID reader-writer and the actual arrangement condition on site, selecting to use a high-frequency RFID reader-writer to read the RFID label of the tool clamp, wherein the ultrahigh-frequency RFID reader-writer is used for reading the RFID label of the part. The embodiment of the invention fully researches the equipment characteristics of the RFID radio frequency high-frequency reader-writer and the ultrahigh frequency reader-writer, combines the characteristics of the automatic line body tool clamp, and finally adopts a scheme of taking the high-frequency reader-writer as a main part and taking the ultrahigh frequency reader-writer as an auxiliary part. The read-write success rate can be effectively improved and the cost can be reduced.
The workstation is also used for judging whether the information stored in the RFID label of the tool clamp or the part is matched with the current production plan, and when the information is matched with the current production plan, the current production plan is executed.
Specifically, each tooling fixture or part is internally provided with an RFID tag, namely, after the workstation controls the RFID reader to identify the RFID tag of the tooling fixture or part, whether the information stored in the RFID tag of the tooling fixture or part is matched with the current production plan is judged, and when the information is matched, the corresponding industrial production is matched according to the production plan given by the MES.
The production system based on the discrete workstation comprises the workstation, a clamp library and a material library. By arranging the RFID readers in the clamp library and the material library, when the clamp or the part is conveyed to the workstation, the RFID readers identify the RFID label of the fixture or the part and judge whether the RFID label is matched with a plan, so that independent information transmission and collaborative production of each standard workstation, the clamp library and the part library are realized, the automobile manufacturing period can be effectively shortened, and the production cost is reduced.
In consideration of the fact that the fixture library can smoothly complete normal fixture scheduling, the fixture library is used for storing fixtures, receiving a fixture scheduling plan sent by the manufacturing execution system, and executing fixture moving according to the fixture scheduling plan. The fixture library is also used for feeding back AGV transportation request information to the manufacturing execution system after the fixture is moved to the library.
Referring to the schematic flow chart of tooling fixture switching shown in fig. 3, the MES issues a vehicle model production plan to the workstation and a fixture scheduling plan to the fixture library. After receiving the dispatching instruction, the PLC of the clamp library firstly moves the library, sends the AGV transportation requirement to the MES after the library moving is completed, and the MES sends the AGV dispatching instruction. And the central control room dispatches the AGV to the designated position of the clamp library, the AGV transmits the in-place signal back to the central control room, the central control room sends the in-place signal to the PLC of the clamp library, the PLC of the clamp library opens a door, the AGV drives into the clamp library, and the clamp is lifted to drive out of the clamp library. After the AGV completely exits the fixture library, the information is transmitted to the central control room, the central control room feeds back the signal to the MES, the MES sends a door closing signal of the fixture library to the fixture library, and the fixture library is closed.
Meanwhile, the AGV drives to the designated position of the workstation, the in-place signal is fed back to the AGV center control room, the in-place signal is transmitted to the MES by the AGV center control room, the workstation PLC controls the opening of the safety door, the in-place signal is fed back to the MES, the MES feeds back the signal to the AGV center control room, the proximity switch of the workstation senses that the clamp is in place, and the RFID reader is triggered to recognize the clamp label. And the AGV is controlled by the AGV central control room to enter the designated position of the workstation, and the clamp is put down. And the PLC of the workstation judges whether the RFID label information is matched with the production plan, and if so, the plan is assigned according to the MES to match the industrial production. And if not, alarming.
The concrete flow of the fixture library moving is as follows: the MES issues the new motorcycle type production plan to the workstation, issues anchor clamps dispatch plan to the anchor clamps storehouse simultaneously, and anchor clamps storehouse PLC accepts the scheduling instruction after, moves the storehouse at first. At the moment, the RFID reader-writer reads the RFID label identification vehicle type information of the clamp and sends the vehicle type information to the controller of the clamp library. The jig library controller confirms the position of the jig of the vehicle type and then switches the jig. The traditional clamp library identifies clamps through sensors, but only can be used under the condition that two or three different vehicle types are collinear, but if multiple vehicle types exist, a plurality of sensors are needed, logical judgment is needed, the RFID can store information, the information can be directly written in and read to judge the vehicle type and the library position information, and then clamp switching is carried out. The warehouse moving process can move the required clamp to the position of the elevator in advance, reduces the preparation time in the early stage, realizes the flexible storage of the clamp warehouse, and improves the clamp switching efficiency.
Considering that information interaction can be smoothly performed among the workstations, for example, when the workstation 1 needs to be docked with the workstation 2 after completing a task, the workstation may be further configured to control the RFID reader to write status information to the RFID tag of the sled. Wherein the status information includes at least one of: workstation serial number, bill of material information, special designation number or workstation status number. The skid is used for carrying parts. Specifically, the online serial number is mainly used for tracing back that the same vehicle type may be produced in different batches, such as 1804210001, which represents the 1 st sub-assembly of the workstation produced in 2018, 4, month and 21. The Bill of Material information, i.e. the BOM (Bill of Material) number, i.e. the Material number of this workpiece, the operator can know which configuration of which type of vehicle the sub-assembly belongs to, and is used to invoke the process program of the robot for that type of vehicle.
The workstation is also used for reading the state information stored in the RFID label of the skid when the skid arrives, judging whether the state information is matched with the current production plan or not, and executing the current production plan when the state information is matched with the current production plan. Referring to the flow diagram of information transmission between workstations shown in fig. 4, after the MES is started, it is shown that the MES starts to determine whether the MES receives the demand information of the linear AGV, and if so, the MES writes information into the AGV scheduling information area and starts the timer. At this time, the preset time information has been set in the AGV schedule information area in advance, and may be set to 2 minutes, for example. Then, after the MES starts for two minutes, judging whether the AGV receives scheduling information or not, and if so, executing the next action; if not, starting to alarm and displaying: manual intervention processing is required and it is checked whether there is an OPC (OLE for Process Control ) failure.
Wherein, OPC is an industrial standard, after the manual intervention is finished, check whether the trouble is solved, if has already solved, PLC clears the scheduling information that writes into. And then, the AGV central control room dispatches the idle AGV to the cabin workstation, and transmits the in-place information back to the AGV central control room, and the AGV central control room transmits the in-place information to the IT PLC and simultaneously serves as the passing point information. The IT PLC transmits the in-place information to the workstation PLC, then starts an engine room station RFID reader-writer to read RFID label information, judges whether the AGV skid information is matched with the production information or not, and gives an alarm if the AGV skid information is not matched with the production information; and if the current production plan is matched with the production plan, writing the serial number of the lower vehicle body marrigage workstation, BOM (bill of material) and the like into the skid RFID tag, displaying the current production plan on the HMI (human machine interface) screen, and simultaneously sending instructions to the rear floor station, the cabin station and the cabin station.
And manually judging whether the stock taking part is the linear part or not on the rear floor station and the cabin station. And then placing the engine room and the rear floor on the AGV, judging whether the AGV is a special designated vehicle, if so, reading RFID information of the engine room and the rear floor through a wireless handheld RFID, transmitting the information to an MES through a workshop looped network wireless network, and judging whether the AGV is the same special designated vehicle. If the vehicle is not the designated vehicle, an alarm is given immediately, if the vehicle is the designated vehicle, a start button is manually pressed down, and the AGV judges that the vehicle is not blocked and drives to the gluing workstation. And after the AGV reaches the gluing workstation, judging whether the skid is placed in place, if not, giving an alarm, and if so, triggering an RFID reader to read, identifying skid information, confirming vehicle type information of the lower vehicle body, and then carrying out next-step production.
In the embodiment of the invention, after the previous workstation finishes welding operation, the workstation serial number, the material BOM, the special designation number and the workstation state number of the workstation are written into a skid RFID label together, a skid is conveyed to the next workstation along with an AGV, and the next workstation reads skid RFID information and issues a production plan to be matched by an MES; by introducing the RFID technology and the information storage and real-time reading and writing functions of the RFID reader-writer, the information transmission and the cooperative production among various systems and workstations are realized.
Example 2
An embodiment of the present invention provides a production control method based on a discrete workstation, which is applied to a workstation, and referring to a flowchart of a production control method based on a discrete workstation shown in fig. 5, the method includes:
and S502, controlling the RFID reader to identify the RFID label of the tool clamp or the part when the tool clamp or the part is transported to the workstation.
Give new motorcycle type production plan to workstation under MES, give down anchor clamps dispatch plan simultaneously respectively and throw material plan to anchor clamps storehouse and material storehouse, the anchor clamps storehouse accepts the scheduling instruction after, at first move the storehouse, send AGV transportation demand to MES after moving the storehouse and accomplishing, the MES is given down the AGV dispatch and is appointed, AGV carries new motorcycle type anchor clamps to the workstation, this workstation passes through the label on the high frequency RFID read write line discernment frock clamp afterwards, meanwhile, material storehouse is received and is thrown material plan after, with assembly part complete clamping to workstation anchor clamps, start the label information that the ultrahigh frequency RFID read write line read on the part.
Step S504, whether the information stored in the RFID label of the tool clamp or the part is matched with the current production plan is judged.
Specifically, each tooling fixture or part is provided with an RFID tag, that is, after the workstation controls the RFID reader to identify the RFID tag of the tooling fixture or part, it is determined whether the information stored in the RFID tag of the tooling fixture or part matches the current production plan.
Step S506, if yes, executing the current production plan.
When the RFID label information of the identified tooling clamp is matched with the production plan, the RFID reader-writer reads the RFID label identification vehicle type information of the clamp at the moment and sends the vehicle type information to the controller of the clamp library, and the clamp library controller confirms the position of the vehicle type clamp and then switches the clamp; and when the RFID label information of the identified part is matched with the production plan, the matching of the production system and the feeding system information is realized. Referring to the flow diagram of part identification shown in fig. 6, in the diagram, the MES issues a production plan to the PLC of the workstation, and at the same time issues a feeding plan, and then the material warehouse schedules the materials according to the feeding plan. At the moment, the material warehouse places the material on the material rack, and the material is carried with the motorcycle type with the configuration in groups, and corresponding workstation PLC reads RFID's label information afterwards and judges whether the production plan that assigns with the MES matches, if match, then carries out corresponding industrial production according to the MES plan. Wherein, the same vehicle type and the same configuration are distributed in groups, which means that all required parts of one station are put together for conveying.
Considering that information interaction can be smoothly performed among the workstations, the workstations can also be used for controlling the RFID reader-writer to write state information into the RFID label of the skid; the status information includes at least one of: workstation serial number, bill of material information, special designation number or workstation status number. Wherein the skid is used for bearing parts. In addition, the workstation is also used for reading the state information stored in the RFID label of the skid when the skid arrives, judging whether the state information is matched with the current production plan or not, and executing the current production plan when the state information is matched with the current production plan.
The production control method based on the discrete workstation provided by the embodiment of the invention has the same technical characteristics as the production system based on the discrete workstation provided by the embodiment, so that the same technical problems can be solved, and the same technical effects are achieved.
Example 3
An embodiment of the present invention provides a production control device based on a discrete workstation, which is applied to a workstation, and is shown in fig. 7, where the production control device based on a discrete workstation is a schematic structural diagram, and the device includes:
and the reading module 71 is used for controlling the RFID reader-writer to identify the RFID label of the tool clamp or the part when the tool clamp or the part is transported to the workstation.
And the MES issues a new vehicle model production plan to the workstation, and simultaneously issues an anchor clamps dispatching plan and a feeding plan to an anchor clamps library and a material library respectively, and the anchor clamps library completes the switching of the anchor clamps after receiving dispatching instructions. And then, the AGV conveys the fixture of the new vehicle type to a workstation, and then the workstation identifies the label on the fixture through a high-frequency RFID reader. Meanwhile, after the material warehouse receives a feeding plan, the assembly part is completely clamped to the work station clamp, and the ultrahigh frequency RFID reader-writer is started to read the label information on the part.
And the judging module 72 is used for judging whether the information stored in the RFID tag of the tool clamp or the part is matched with the current production plan.
And the RFID label is arranged in each tool clamp or part, namely, after the work station controls the RFID reader-writer to identify the RFID label of the tool clamp or part, whether the information stored in the RFID label of the tool clamp or part is matched with the current production plan or not is judged.
And an executing module 73, configured to execute the current production plan if yes.
When the RFID label information of the identified tooling clamp is matched with the production plan, the RFID reader-writer reads the RFID label identification vehicle type information of the clamp at the moment and sends the vehicle type information to the controller of the clamp library, and the clamp library controller confirms the position of the vehicle type clamp and then switches the clamp; when the RFID tag information of the identified part matches the production plan, a corresponding production task is performed.
The production control device based on the discrete workstation provided by the embodiment of the invention has the same technical characteristics as the production system based on the discrete workstation provided by the embodiment, so that the same technical problems can be solved, and the same technical effects are achieved.
In addition, it should be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a division of one logic function, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A discrete workstation-based production system, comprising: the device comprises a workstation, a clamp library and a material library; the fixture library is used for storing the fixture; the material warehouse is used for storing parts required by production; the tool clamp and the part are respectively provided with an identification RFID tag; the workstation comprises an RFID reader-writer;
the workstation is used for controlling the RFID reader to identify the RFID label of the tool clamp or the part when the tool clamp or the part is transported to the workstation;
the workstation is also used for judging whether the information stored by the RFID tag of the tool clamp or the part is matched with a current production plan, and when the information is matched with the current production plan, the current production plan is executed;
when the next workstation needs to be docked, the workstation is also used for controlling the RFID reader-writer to write state information into the RFID label of the skid; the status information includes at least one of: a workstation serial number, bill of material information, a special designation number or a workstation state number; the skid is used for bearing the part.
2. The production system of claim 1, wherein the workstation is further configured to read status information stored by the RFID tag of the sled when the sled arrives, determine whether the status information matches the current production plan, and execute the current production plan when the status information matches the current production plan.
3. The production system of any one of claims 1-2, wherein the RFID reader comprises a high frequency RFID reader and an ultra high frequency RFID reader;
the high-frequency RFID reader-writer is used for reading the RFID label of the tool clamp;
and the ultrahigh frequency RFID reader-writer is used for reading the RFID label of the part.
4. The production system of any one of claims 1-2, wherein the fixture library is further configured to receive a fixture scheduling plan sent by a manufacturing execution system, and perform fixture moving according to the fixture scheduling plan;
and the fixture library is also used for feeding back AGV transportation request information to the manufacturing execution system after the fixture library moving is finished.
5. The production system of claim 4, wherein the fixture library comprises a fixture library RFID reader; the clamp library RFID reader-writer is used for reading the RFID label identification vehicle type information of the clamp and sending the vehicle type information to the controller of the clamp library.
6. A production control method based on discrete workstations is characterized by being applied to the workstations and comprising the following steps:
when a tooling fixture or a part is transported to the workstation, controlling an RFID reader-writer to identify an RFID label of the tooling fixture or the part;
judging whether the information stored in the RFID tag of the tool clamp or the part is matched with the current production plan;
if yes, executing the current production plan;
when the next workstation needs to be docked, controlling the RFID reader-writer to write state information into the RFID label of the skid; the status information includes at least one of: a workstation serial number, bill of material information, a special designation number or a workstation state number; the skid is used for bearing the part.
7. The method of claim 6, further comprising:
reading state information stored by an RFID (radio frequency identification) tag of the skid when the skid arrives;
judging whether the state information is matched with the current production plan or not;
and executing the current production plan when the state information is matched with the current production plan.
8. A production control device based on discrete type workstation is characterized in that, applied to the workstation, the device comprises:
the reading module is used for controlling an RFID reader-writer to identify the RFID label of the tool clamp or the part when the tool clamp or the part is transported to the workstation;
the judging module is used for judging whether the information stored in the RFID tag of the tool clamp or the part is matched with the current production plan;
the execution module is used for executing the current production plan if the current production plan is the current production plan;
the control module is used for controlling the RFID reader-writer to write state information into the RFID label of the skid when the next workstation needs to be docked; the status information includes at least one of: a workstation serial number, bill of material information, a special designation number or a workstation state number; the skid is used for bearing the part.
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| CN110711974B (en) * | 2019-09-25 | 2021-07-13 | 中国第一汽车股份有限公司 | Multi-vehicle flexible welding line information management and scheduling system |
| CN111292047B (en) * | 2020-03-19 | 2021-01-05 | 深圳市优必爱信息科技有限公司 | Automobile part source tracing method and system based on Internet of things and block chain |
| CN111830923A (en) * | 2020-07-31 | 2020-10-27 | 上汽大通汽车有限公司 | Automatic skid falling system of skid conveying line and control method |
| CN114200903A (en) * | 2021-12-13 | 2022-03-18 | 中国联合网络通信集团有限公司 | Method and apparatus for controlling automated process production and computer readable storage medium |
| CN114879614A (en) * | 2022-04-29 | 2022-08-09 | 济南大学 | Flexibly manufactured AGV (automatic guided vehicle) scheduling method |
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