CN115374641A - Visual editing method suitable for production scheduling of three-dimensional virtual factory - Google Patents

Abstract

A visual editing method suitable for production scheduling of a three-dimensional virtual factory belongs to the field of process simulation and digital twin virtual verification. The method comprises the steps of generating a visual process route by utilizing a BOM list of a product, associating a process with an equipment model corresponding to an equipment model in a three-dimensional scene, storing equipment of an automatic processing unit into a background resource library through three-dimensional modular design, carrying out three-dimensional twin reduction design according to real unit layout, importing process parameters and equipment processing data into a platform, and enabling the whole unit to be linked through data driving, so that the production line frame rate of a graphic engine capable of running multiple equipment and a complex processing process can reach more than 60 frames.

Description

Visual editing method suitable for production schedule of three-dimensional virtual factory

Technical Field

The invention belongs to the field of process simulation and digital twin virtual verification, and particularly relates to a visual editing method suitable for production scheduling of a three-dimensional virtual factory.

Background

With the continuous and abundant research on digital twin modeling and methods of production lines at home and abroad, enterprises and scholars mention that digital twin technology can realize a plurality of functions, but real key technology is easy to ignore. Currently, simulation and virtual verification optimization technologies of machining processes from design to production are lacked in China. When simulation software provided by Siemens company realizes real-time mapping, the problem of enterprise ERP-simulation platform-MES/machine connection also exists, and an enterprise work order cannot be converted into a visual three-dimensional graph corresponding to the enterprise work order.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a method for virtual verification of an intelligent processing unit process flow.

The technical scheme adopted by the invention is as follows: a visual editing method suitable for production scheduling of a three-dimensional virtual factory is suitable for being executed in an APS (active safety system) production scheduling system and technically characterized by comprising the following steps of:

step 1, building a virtual factory with the function consistent with that of a physical factory in a free dragging mode by a method of building a universal equipment model library in various industries; carrying out virtual-real mapping on an equipment model for constructing a virtual factory and an enterprise ERP or equipment asset management system to enable the equipment model to obtain the available date and time attribute of the equipment;

step 2, obtaining the work orders which are pushed by the enterprise ERP system and need to be scheduled through an interface, selecting the work orders which need to be processed and combining the virtual factory built in the step 1 to perform visual scheduling editing, specifically:

step 2.1, calling out a corresponding BOM list of products according to the work order to generate a visual component process route;

and 2.2, selecting a product with the highest grade in the BOM list to establish a new assembly process route, and generating a product tree structure.

In the scheme, the virtual factory building in the step 1 is that a factory building two-dimensional CAD drawing is led in and mapped on the ground of a scene editing area to be used as position reference; and dragging the model to a position reference position in a three-dimensional scene in a model base built in software, and putting the equipment model to a corresponding position by dragging, rotating the model or manually inputting the three-coordinate position of the model to be consistent with the real workshop.

In the above scheme, the virtual-real mapping is performed between the equipment model and the enterprise ERP or the equipment asset management system, and the virtual-real mapping is performed by connecting the virtual plant to the enterprise ERP system or the equipment management system to bind the equipment of the physical plant with the virtual model in the three-dimensional scene through the equipment number inside the enterprise so as to obtain the available date and time of the equipment in real time.

In the above scheme, step 2 needs to perform preliminary editing and perfecting on the work order task received by the system before performing the visualization scheduling:

(1) checking whether the work order has specific scheduled start time and scheduled delivery time, and if not, manually performing date improvement: selecting a specific date for the planned start date or selecting to start as soon as possible; selecting a specific date for the scheduled delivery date or selecting an as-soon-as-possible delivery;

(2) checking whether the work order carries a corresponding product BOM list, if not, establishing the product BOM list in a mode of importing a BOM list Excal table;

(3) if the enterprise does not have the enterprise ERP system or the ERP system does not have the function of issuing the work order, the work order information is manually input or the work order task is added in an Excal form input mode, and a product BOM list corresponding to the work order is input in the Excal form input mode.

In the above scheme, the process route for generating the visual component in step 2.1 is as follows:

selecting a work order to call out a corresponding BOM list, and acquiring the product level and completing the consumption information of one product to the component from the BOM list;

and (3) carrying out visual process route editing on each part in the BOM list from bottom to top according to process cards provided by process departments:

selecting a part in a BOM table to newly build a part process route, adding nodes in a part process route editing panel, wherein one node represents one process or process step, the name of the modified node is consistent with the contents of a processing process card and a process card, if one process comprises a plurality of process steps, the process steps need to be edited, then the process steps are combined into one process, and the combined process is renamed to be the process name on the process route card;

and connecting the defined nodes in a one-way arrow manner to form a one-way visual process route.

In the scheme, the nodes are divided into manufacturing, purchasing, outsourcing and conventional types, the type of the visualized process route node bound with the equipment model is required to be the manufacturing type, the purchasing, outsourcing and conventional types are not bound with the equipment model, the purchasing type node comprises a purchasing lead period attribute, the structure of the outsourcing type node comprises a delivery period date attribute, and the conventional type node comprises an integral time-consuming attribute.

In the above solution, the process in step 5 corresponds to a plurality of equipment models that can complete the process, and is used to assign the same process to different equipment models as a scheduling antecedent condition to implement subsequent scheduling optimization.

In the above scheme, the process of generating the product tree structure in step 2.4 is as follows:

selecting a finished product with the highest BOM level to newly build an assembly process route, generating a default main node, and defaulting the node name to the name of the selected finished product;

the main node branches out a plurality of sub-nodes, and node building of a product tree structure is completed according to the BOM;

editing nodes, setting the assembling step labor hour and the number of consumed parts in the step in the node attribute;

the invention has the beneficial effects that: the invention is suitable for the visual editing method of the production scheduling of the three-dimensional virtual factory, utilize BOM list of the product to produce the visual process route, associate the process with the apparatus model of the corresponding apparatus model in the three-dimensional scene, pass the apparatus of the automatic processing unit three-dimensionally and modularly design, store into the resource bank of backstage, carry on the three-dimensional twin reduction design according to the real unit layout, import the technological parameter and apparatus processing data into the platform, make the whole unit interlock through the data drive, make the graphic engine can operate the production line frame rate of the multiple devices, complicated processing technology can reach more than 60 frames.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a flowchart of a method for virtual verification of an intelligent processing unit process flow in an embodiment of the present invention.

Detailed Description

The above objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings 1.

The visualization scheduling method based on the three-dimensional scene adopted by the embodiment comprises the following steps:

step 1, building a virtual factory with the function consistent with that of a physical factory in a free dragging mode by a method of embedding a universal equipment model library in various industries, wherein the process is as follows: firstly, plant two-dimensional CAD drawings can be led in to be mapped on the ground of a scene editing area to serve as position references, then the equipment model is dragged into a three-dimensional scene in an equipment model library built in APS software, and the equipment model is placed on a corresponding position through dragging, rotating the model or manually inputting the three-coordinate position of the model, so that the situation is consistent with a real workshop. In the process, only the position of the equipment is edited, and three-dimensional modeling construction is not carried out on other secondary information such as walls, stairs and the like of a factory building.

And carrying out virtual-real mapping on the equipment model and the enterprise ERP or equipment asset management system. After the virtual factory is built, an enterprise ERP system or an equipment management system needs to be connected, and equipment is bound with a virtual model in a three-dimensional scene through an equipment number inside the enterprise so as to obtain the available date and time of the equipment in real time, and if no production task is available from 8 pm to 11 pm in Monday to Wednesday, scheduling allocation can be performed.

And 2, the APS production scheduling system acquires the work orders needing scheduling pushed by the enterprise ERP system through an interface, and selects the work orders needing processing to perform visual scheduling editing in combination with the virtual factory built in the step 1.

And 2.1, performing preliminary editing and perfecting on the work order before visual scheduling editing. As shown in table 1:

table 1 is a work order List

(1) First, the work order is checked for specific scheduled start times and scheduled delivery times, and if not (as shown by sequence number 2), the completion of the date is done manually. A specific date may be selected for the scheduled start time or start as soon as possible (as indicated by sequence number 4); a specific date may be selected for the scheduled delivery time or the delivery may be selected as soon as possible (as shown by sequence number 3).

(2) Checking whether the work order carries the BOM list of the corresponding product, such as serial numbers 1, 3 and 4, if not, such as serial number 2, the BOM list Excal table needs to be imported.

If the enterprise does not have the ERP system or the ERP system does not have the function of issuing the work order, the work order task needs to be manually input or imported through an Excal table. And selecting a work order to be processed in the work order list to create a visual scheduling task, and entering a visual scheduling editing interface link.

And 2.2, selecting the work order to call out a corresponding product BOM list, and acquiring the product level and completing the consumption information of one product to the component from the product BOM list.

TABLE 2 BOM List

According to the BOM list of the electric cleaning machine product shown in the table, the levels of the product or the component can be checked in the BOM list, the component is divided into 0 level, 1 level and 2 levels, wherein the levels of the water tank, the spray nozzle, the water pipe, the water pump and the electric control circuit board are all 1 level, the levels of the upper water tank cover, the main water tank body and the lower water tank cover are all 2 levels, the consumption condition of the quantity of each component of a finished product can be checked in the list, and the final finished product is 0 level.

And (3) performing visual part process route editing on each item in the BOM list of the product according to a process card provided by a process department, wherein the process route is generally edited from bottom to top:

step 2.2.1, firstly, editing the lower cover of the water tank corresponding to the serial number 9, newly building a part process route, automatically generating a node, changing the type of the node into manufacturing in a node attribute editing panel, and picking up an injection molding machine for processing the part in a three-dimensional scene by using a binding equipment function in the attribute panel, wherein the type of the injection molding machine is usually given by a process route card or other process guidance files, so that the process route editing of the lower cover of the water tank is completed; the water tank upper cover and the water tank main body are injection molded parts in the same way.

And 2.2.2, comparing the electric control circuit boards corresponding to the serial number 6, wherein the process type of the electric control circuit boards is outsourcing, the node type is changed to outsourcing after the process route of the part is newly built, the arrival date of the outsourcing is input in the node attribute editing panel, and the outsourcing can be filled in batches, such as 500 pieces of the arrival 2022.08.17 and 600 pieces of the arrival 2022.09.01.

And 2.2.3, sequentially editing the water pump corresponding to the serial number 5 and the water pipe corresponding to the serial number 4, wherein the water pump and the water pipe are both purchasing parts according to the table 1, changing respective node types into purchasing after a new component process route is built, inputting a purchasing lead period in a node attribute editing panel, and recording the lead period into a scheduling date table by later-stage scheduling.

Step 2.2.4, the nozzle corresponding to the serial number 3 is edited, the nozzle is a manufacturing type part, the node type is changed into manufacturing after a new part process route is established, the nozzle is a metal part and is completed by machining, multiple processes are involved, each process may be composed of one or more steps, as shown in table 3:

TABLE 3 Process card for nozzle

As can be seen from table 3, the nozzle was composed of three steps. And changing the default generated node type into manufacturing in a node property editing panel, changing the node name into a procedure 1, binding C620-1 type equipment in a virtual factory by using an equipment binding function, and finishing the editing of a procedure name, namely a vehicle, corresponding to the work sequence number 1. And continuing to edit the processes corresponding to the work numbers 2 and 3. The step 2 in this embodiment further includes the steps shown in table 4:

table 4 shows the process cards with the process number 2

As shown in table 4, the work number 2 includes two total work steps, each work step corresponds to one device, a new node is created, the node name is changed to the work step 1, the node type is changed to manufacture, and the device binding function is used to bind the vertical drilling machine device of the Z535 type in the virtual factory, so as to complete the editing of the work step 1. And (3) building a new node, changing the node name into the process step 2, changing the node type into manufacturing, and binding the vertical drilling machine equipment with the Z635 model in a virtual factory by using the equipment binding function to finish the editing of the process step 2. The two nodes are connected by arrows to form a sequence of process steps. Combining the two nodes by using a combination tool, naming the newly generated combined node as a process 2, and finishing the editing of the process 2;

and (3) newly building a node, changing the default generated node type into manufacturing in a node property editing panel, changing the node name into a process 3, and binding the vertical drilling machine equipment with the Z735 model in a virtual factory by using an equipment binding function to finish the editing of the process 3.

The processes 1, 2 and 3 are connected by arrows to form sequential processing steps, so that the process route editing of the nozzle is completed.

The nodes in this embodiment include four types: manufacturing, procurement, commission, and convention. The manufacturing type refers to a component type which needs to be processed by equipment in an enterprise, and specific equipment models need to be bound in the editing process of the nodes; the purchase type refers to the parts which need to be directly purchased from other manufacturers, a visual process route of the product generally only has one node, a purchase lead time needs to be defined for the node, and the purchase lead time refers to the waiting time of the purchase order form and then the product is received, and the unit is day. The type of outsourcing refers to a class of parts which are processed and produced by other manufacturers according to the technical scheme and requirements provided by a user party, the delivery date of the class of parts is usually provided by contract agreement or a party B, and the time nodes of the class of nodes are filled according to actual conditions. The conventional type refers to the content that some complex production processes or staged results are difficult to describe by process routes, and the nodes only need to define the whole time consumption in units of minutes.

For purchased or outsourced parts, the visual process route editing means that the time attribute of the node is given.

And 2.2.5, selecting a finished product of the cleaning machine, newly building an assembly process route, and generating a default main node (the hierarchy is 0) according to the BOM table, wherein the node is named as the cleaning machine. Four branch nodes with the level 1 are split under the main node: water tank, nozzle, water pipe and water pump, wherein, the water tank further splits out the three branch node that the level is 2 again: the water tank upper cover, the water tank main body and the water tank lower cover form a product tree. The number of assembly steps and the number of consumable parts are set in each node attribute of the product tree.

And 5, finishing visual editing of the assembly process from the production of the bottommost part to the final finished product.

And 2.3, selecting a node in a process route, selecting an equipment model of the equipment model corresponding to the procedure (process step) in the three-dimensional scene by using an equipment binding function, wherein the equipment model can be selected more, and the equipment shows a highlight effect in the three-dimensional scene when the node is clicked again after binding is finished, so that the binding relation is shown. The visualized process route node type bound to the plant model must be the manufacturing type.

The method comprises the steps that parameter setting is carried out on a virtual machine station for completing each process, the attribute of the virtual machine station is subjected to differential design of partial parameters according to equipment and industrial characteristics, and the essence of the method is control over time, for example, machine tool parameters of the machining industry comprise feeding time, discharging time, processing time, cutter replacing time and cutter resources; the machine parameters of the injection molding machine in the injection molding industry comprise upper mold time, lower mold time, single processing time and mold resources, a mold management list is opened from an injection molding machine attribute panel to custom add molds, and the names and the number of the molds are recorded according to actual conditions; the parameters of other general equipment are mainly processing time.

The embodiment can realize the association of an enterprise ERP-APS scheduling system-MES/machine through the steps. And after the time constraint, equipment and resource constraint of scheduling are finished, providing a basis for forming an optimal solution for subsequent scheduling.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (8)

1. A visual editing method suitable for production schedule of a three-dimensional virtual factory is suitable for being executed in an APS production scheduling system, and is characterized by comprising the following steps:

step 1, building a virtual factory with the function consistent with that of a physical factory in a free dragging mode by a method of building a universal equipment model library in various industries; carrying out virtual-real mapping on an equipment model for constructing a virtual factory and an enterprise ERP or equipment asset management system to enable the equipment model to obtain the available date and time attribute of the equipment;

step 2, obtaining the work orders which are pushed by the enterprise ERP system and need to be scheduled through an interface, selecting the work orders which need to be processed and combining the virtual factory built in the step 1 to perform visual scheduling editing, specifically:

step 2.1, calling out a corresponding product BOM list according to the work order to create a visual component process route;

and 2.2, selecting a product with the highest level in the BOM list to establish a new assembly process route, and establishing a product tree structure.

2. The visual editing method suitable for the production schedule of the three-dimensional virtual factory as claimed in claim 1, wherein the virtual factory building in step 1 is firstly mapped on the ground of a scene editing area as a position reference by importing a factory building two-dimensional CAD drawing; dragging the model to a position reference position in a three-dimensional scene in a model base built in software, and putting the equipment model to a corresponding position through dragging, rotating the model or manually inputting the three-coordinate position of the model to be consistent with a real workshop; if the model base does not contain the model number of the equipment in the actual workshop, the local three-dimensional model is automatically uploaded or the size of the virtual workshop with consistent position and function is realized by using general equipment with similar functions; if the equipment is self-developed or has confidentiality, the universal virtual geometry is dragged to replace, a virtual workshop with consistent position and function is realized by adjusting the size of the virtual geometry, and the universal virtual geometry has the function of binding a resource calendar and the function of setting processing time as the equipment in the model library.

3. The visual editing method suitable for three-dimensional virtual plant production scheduling as claimed in claim 1, wherein the virtual-real mapping of the device model and the enterprise ERP or device asset management system is performed by docking the enterprise ERP or device management system after the virtual plant is built to bind the devices of the physical plant with the virtual model in the three-dimensional scene through the device numbers inside the enterprise to obtain the available dates and times of the devices in real time.

4. The visual editing method for three-dimensional virtual factory production scheduling as claimed in claim 1, wherein step 2 requires preliminary editing and perfecting of the work order task received by the system before visual scheduling:

(1) checking whether the work order has specific scheduled start time and scheduled delivery time, and if not, manually performing date improvement: selecting a specific date for the planned start date or selecting to start as soon as possible; selecting a specific date for the scheduled delivery date or selecting an as-soon-as-possible delivery;

(2) checking whether the work order carries a corresponding product BOM list, if not, establishing the product BOM list in a mode of importing a BOM list Excal table;

(3) if the enterprise does not have the enterprise ERP system or the ERP system does not have the function of issuing the work order, the work order information is manually input or the work order task is added in an Excal form input mode, and a product BOM list corresponding to the work order is input in the Excal form input mode.

5. The visual editing method for three-dimensional virtual factory production scheduling as claimed in claim 1, wherein said step 2.1 of generating visual component process route is as follows:

selecting a work order to call out a corresponding BOM list, and acquiring the product level and completing the consumption information of one product to the component from the BOM list;

and (3) editing the visual process route of each part in the BOM list from bottom to top according to the process cards provided by the process departments:

selecting a part in a BOM table to newly build a part process route, adding nodes in a part process route editing panel, wherein one node represents one process or process step, the name of the modified node is consistent with the contents of a processing process card and a process card, if one process comprises a plurality of process steps, the process steps need to be edited, then the process steps are combined into one process, and the combined process is renamed to be the process name on the process route card;

and connecting the well-defined nodes in a one-way arrow manner to form a one-way visual process route.

6. The visual editing method suitable for production scheduling of three-dimensional virtual factory as claimed in claim 5, wherein the component process route nodes are classified into manufacturing, purchasing, outsourcing and regular, the visual process route node type bound with the equipment model must be manufacturing type, purchasing, outsourcing and regular are not bound with the equipment model, the purchasing type node includes a purchasing lead period attribute, the structure of the outsourcing type node includes a delivery period date attribute, and the regular type node includes an overall time consuming attribute.

7. The visual editing method for scheduling of three-dimensional virtual factory production as claimed in claim 5, wherein the process in step 5 corresponds to a plurality of equipment models capable of completing the process, and is used to assign the same process to different equipment models as a lead condition for scheduling so as to achieve subsequent scheduling optimization.

8. The visual editing method for production schedule of three-dimensional virtual factory as claimed in claim 1, wherein the procedure of generating the product tree structure in step 2.2 is:

selecting a finished product with the highest BOM level to newly build an assembly process route, generating a default main node, and defaulting the node name to the name of the selected finished product;

then branching a plurality of sub-nodes from the main node to form nodes of a tree structure;

editing nodes, setting the assembly step man-hours in the node attribute, and setting the step consumption part number.

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