CN114415913A - Virtual printer assembly method based on virtual simulation technology - Google Patents
Virtual printer assembly method based on virtual simulation technology Download PDFInfo
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- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
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Abstract
The invention provides a virtual assembly method of a printing machine based on a virtual simulation technology, which comprises the following steps: and (3) constructing a PZ1740E offset printer model through 3Ds MAX software, importing the constructed PZ1740E offset printer model into a Blender for paper-feeding animation design, importing the model and animation into Unity, and realizing functions. According to the virtual assembly method of the printing machine based on the virtual simulation technology, provided by the invention, the requirement of people on developing a virtual simulation system of a printing process flow is met by combining the fault simulation function and the virtual assembly system, a solution is provided for realizing virtual simulation of the reasons for generating the fault of the printed image, and the expansion and development of the content of the virtual assembly system are promoted.
Description
Technical Field
The invention relates to the technical field of virtual simulation, in particular to a virtual assembly method of a printing machine based on a virtual simulation technology.
Background
Nowadays, with the progress of the times and the rapid development of scientific technology, the virtual assembly technology has been developed into a high and new technology, which is widely applied to the simulation assembly process in the virtual environment and becomes a vital component of virtual manufacturing. The method perfectly combines the advantages of a virtual reality technology and a three-dimensional modeling technology, simulates a virtual assembly environment, verifies whether the design idea and the operation process of assembly are correct or not, is convenient for finding the problems existing in assembly early, further modifies the model, and finally can realize the visualization of the assembly process. The collision detection technology is an indispensable key technology in the virtual assembly process, can improve the reality of the virtual assembly process, and plays an important role in enhancing the immersion sense of the virtual assembly system. Many universities and laboratories abroad are beginning to focus on research and development of virtual fitting systems and have achieved certain research achievements. In China, the virtual assembly technology is introduced into education and teaching in colleges and universities, related research subjects are increased continuously, and certain research results are obtained.
The printing engineering is an industrial specialty with strong specialization and high requirements for practice and skill, and a practitioner needs to be able to deeply understand the process principle, the flow and the equipment structure. Therefore, under the teaching arrangement of the actual courses, skill training and experiment operation courses should be added to further combine the theoretical knowledge with the production practice. At present, most practical operations cannot be executed due to the reasons of large occupied area, complex operation, serious material consumption, insufficient funds, and the like of printing experimental equipment, and course contents still mainly adopt theoretical teaching. Under the teaching mode, the problems that students are fuzzy or unclear in understanding, accurate cognition is not available, teaching of teachers is difficult and the like often occur, so that the teaching effect is general, and the practical operation is in a formalized process. In the actual operation process, the printing machine is a semi-open type or closed type machine due to large floor space, and the actual operation process, internal mechanical structure and fault problems of the machine cannot be observed.
The virtual simulation technology has the greatest characteristic of being capable of carrying out human-computer interaction, is an effective means for enhancing experimental teaching demonstration and technical training, and solves the three-high problem of high cost, high danger and high pollution and the four-high problem of difficult observation, difficult entry, difficult action and difficult reproduction in the training practice process. The virtual assembly technology is a technology for making a relevant decision of virtual assembly based on a virtual simulation technology, and can perform assembly process design according to information and resources of a product model to obtain a feasible assembly process scheme, such as interference verification of an assembly sequence, a path, a process route and an operation space, and the like to guide actual production.
Therefore, it is necessary to design a virtual assembly method of a printing machine based on a virtual simulation technology.
Disclosure of Invention
The invention aims to provide a virtual assembly method of a printing machine based on a virtual simulation technology, which meets the requirements of people on developing a virtual simulation system of a printing process flow by combining a fault simulation function and a virtual assembly system, provides a solution for realizing virtual simulation of a printing image fault generation reason, and is beneficial to promoting the expansion and development of the content of the virtual assembly system.
In order to achieve the purpose, the invention provides the following scheme:
a virtual assembly method of a printing machine based on a virtual simulation technology comprises the following steps:
step 1: constructing a PZ1740E offset model by 3Ds MAX software;
step 2: guiding the built PZ1740E offset printer model into a Blender for paper feeding animation design;
and step 3: and importing the model and the animation into the Unity to realize the function.
Optionally, in step 1, a PZ1740E offset model is constructed by using 3Ds MAX software, specifically:
the method comprises the steps of carrying out real machine data detection on a PZ1740E offset press to obtain detection data, establishing a hierarchical relation model according to the PZ1740E offset press, analyzing whether the PZ1740E offset press has the same part geometric model, assembly characteristic information and interaction characteristics through the hierarchical relation model, carrying out related structure modeling in 3Ds MAX software according to the detection data and the hierarchical relation model, wherein the transformation operation of model vertexes, line segments and planes is realized through a polygon modeling mode, the material attributes of the PZ1740E offset press are restored through a mapping, rendering and material ball mode, modeling is carried out in a mode of a next sub-assembly body after the group structure modeling, the group component detail modeling and the group modeling are completed according to the hierarchical relation model, and integrating all the sub-assembly bodies to construct a PZ1740E offset press model.
Optionally, in step 2, the constructed PZ1740E offset printer model is imported into a Blender for paper feeding animation design, specifically:
and (3) introducing the constructed PZ1740E offset press model into the Blender, and realizing the circulation animation of paper running through the displacement animation, the rotation animation and the deformation animation.
Optionally, in step 3, importing the model and the animation into Unity, and implementing functions, specifically:
the PZ1740E offset model and the circular animation of the paper run were imported into Unity 3D, a main system interface, a basic cognition module and a printing fault module are designed by utilizing Unity 3D through a PZ1740E offset printer model and a paper running circulation animation, the basic cognition module comprises an equipment basic information display module, a basic theory knowledge learning module and a structure display and assembly module, the equipment basic information display module is used for displaying equipment basic information, the basic theory knowledge learning module is used for displaying printing principles, common faults and operation use information, the structure display and assembly module is used for displaying the automatic disassembly, functional information introduction and assembly functions of partial structures of a main machine and a paper feeder of the PZ1740E offset printer model, the printing fault module is used for displaying paper-feeding animation and simulating fault analysis, and the main system interface is used for selecting modules.
Optionally, the main system interface is designed by using Unity 3D through a PZ1740E offset model and a circular animation of paper operation, specifically:
the method comprises the steps that a main system interface is realized by UGUI, five options are arranged and respectively comprise a cognitive machine module, a theoretical knowledge learning module, a structure learning module, a printing fault module and an exit system, wherein the options of the cognitive machine module correspond to an equipment basic information display module, the options of the theoretical knowledge learning correspond to the basic theoretical knowledge learning module, the options of the structure learning module correspond to a structure display and assembly module, the options of the printing fault module correspond to the printing fault module, different options are clicked by a mouse to enter corresponding functional scenes, the ClOnScene is assigned by monitoring ClOncik behaviors in an Insparent panel, and appointed scene skipping is realized.
Optionally, the basic information display module of the Unity 3D design device is utilized through a PZ1740E offset printer model and a paper running loop animation, which specifically includes:
the Unity 3D design equipment basic information display module is utilized through the PZ1740E offset printer model and the cyclic animation of paper running, and the PZ1740E offset printer model in the equipment basic information display module is rotated, enlarged and zoomed through a mouse, so that a user can view the relevant structural position of the PZ1740E offset printer model.
Optionally, the Unity 3D design basic theory knowledge learning module is utilized through a PZ1740E offset printer model and a paper running cyclic animation, and specifically comprises:
the method comprises the steps of collecting open PZ1740E offset press video resources, playing through a VideoPlayer, creating component buttons in a playing scene, compiling scripts, defining parameters to obtain a video component and a RawImage component, declaring the playing component, judging whether to be mute, setting logic of pausing playing of videos and logic of increasing and decreasing volume, wherein a playing list specifies target videos by setting video index parameters.
Optionally, the Unity 3D design structure display and assembly module is utilized through a PZ1740E offset printer model and a paper-run cyclic animation, specifically:
the structure display and assembly module divides the PZ1740E offset press model into a printing host and a paper feeder, and has the functions of structural information visualization, display and hidden assembly, and automatic disassembly and assembly;
the method comprises the steps that a target object of a structural information visualization function is each sub-assembly part, collision bodies are added to each sub-assembly part, content display is achieved through a GUI (graphical user interface), interaction behaviors between a mouse and an assembly body are judged through monitoring of mouse OnMouseEnter, OnMouseExit and OnMouseDown events, and main information of each sub-assembly part is displayed;
the display and hidden assembly function acquires all objects and related buttons in a scene by monitoring mouse click events, classifies the Tag attributes corresponding to the objects, and displays and hides all sub-assemblies through Hideobj and DisplayObj events;
the automatic disassembly and assembly function is implemented for the printing host and the paper feeder of the PZ1740E offset press model by setting key points and key frames in Animation and moving the relative positions of the target object model.
Optionally, the Unity 3D design printing fault module is designed by a PZ1740E offset printer model and a paper running loop animation, specifically:
the printing fault module comprises a back smearing module, a paper fold module and a pasting module which are respectively used for simulating back smearing, paper fold and pasting faults in the process of printing and paper moving animation, the back smearing module realizes the transformation of smearing traces on paper by applying URP (universal procedure for sheet) through a sample state, a control strip is arranged for adjusting the powder spraying amount and the drier content, the input variable is adjusted through the control strip to enable the paper to be smeared to be changed, a Unity 3D particle system is used for simulating powdered ink to realize the effect of spraying the printing anti-sticking agent on the paper, a collider is added on the paper to enable particles of the powdered ink to collide with the paper, and the process of enabling the powdered ink to fall on the paper is simulated;
the paper wrinkling module represents uneven gripping force by marking angles at the gripper of a roller of the PZ1740E offset printer model, and paper wrinkling disappears by replacing picture resources;
the printing paste module adjusts printing screen points and sample sheet changes according to printing pressure changes and adjusts sample sheet changes according to ink content, wherein the screen point changes are achieved by creating a shader through a graphic rendering technology, and the ink content changes are achieved by changing a sample sheet picture in an array mode.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention provides a virtual assembly method of a printing machine based on a virtual simulation technology, which highly restores a PZ1740E sheet-fed offset press by using a three-dimensional modeling technology and an image rendering technology, realizes basic cognition, assembly and fault simulation function modules of a system by using a human-computer interaction technology and a virtual assembly technology, ensures good interaction between a user and the virtual simulation offset press and vivid presentation of fault simulation, the method reasonably integrates part of theoretical knowledge of printing, virtual assembly technology and fault simulation into the same system, not only the user can master the relevant theoretical knowledge, but also the system can be used as a demonstration display and exploration tool, the printing fault module can research the implementation mode and the control mode of the change of the proof, the change of the dots and the change of the smudging traces, and provides a new idea mode for the development and application content expansion of the virtual assembly system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used 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 inventive exercise.
FIG. 1 is a schematic flow chart of a virtual assembly method of a printing press based on a virtual simulation technology according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a virtual assembly system of a printing press based on a virtual simulation technology according to an embodiment of the present invention;
FIG. 3 is a control frame diagram of a virtual assembly method of a printing press based on a virtual simulation technology according to an embodiment of the present invention;
FIG. 4 is a hierarchical relational model diagram;
FIG. 5 is a schematic view of a UI home page;
FIG. 6a is a main scene elevation view of the structure display and assembly module;
FIG. 6b is a main scene side view of the structure display and assembly module;
FIG. 7 is a schematic diagram of a printing failure module configuration;
FIG. 8 is a logic diagram of smear traces;
FIG. 9 is a schematic view of UV treatment;
FIG. 10 is a schematic diagram of a ShaderGraph prototype.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The invention aims to provide a virtual assembly method of a printing machine based on a virtual simulation technology, which meets the requirements of people on developing a virtual simulation system of a printing process flow by combining a fault simulation function and a virtual assembly system, provides a solution for realizing virtual simulation of a printing image fault generation reason, and is beneficial to promoting the expansion and development of the content of the virtual assembly system.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, a virtual assembly method for a printing press based on a virtual simulation technology provided by an embodiment of the present invention includes the following steps:
step 1: constructing a PZ1740E offset model by 3Ds MAX software;
step 2: guiding the built PZ1740E offset printer model into a Blender for paper feeding animation design;
and step 3: and importing the model and the animation into the Unity to realize the function.
In step 1, a PZ1740E offset model is constructed by 3Ds MAX software, specifically:
performing real machine data detection on a PZ1740E offset press to obtain detection data, in order to avoid a more complicated modeling process caused by complex model structure, carding the PZ1740E offset press, establishing a hierarchical relationship model, as shown in FIG. 4, analyzing whether the PZ1740E offset press has the same part geometric model, assembly characteristic information and interaction characteristics through the hierarchical relationship model, avoiding repeated modeling, performing related structure modeling in 3Ds MAX software according to the detection data and the hierarchical relationship model, wherein, the transformation operation of model vertexes, line segments and planes is realized through a polygon modeling mode, the material attribute of the PZ1740E offset press is restored through a chartlement, rendering and material ball mode, the next sub-assembly body mode is performed after group structure modeling, group component detail modeling and group modeling are completed according to the hierarchical relationship model, and the sub-assemblies are integrated, a PZ1740E offset model was constructed.
In step 2, importing the built PZ1740E offset printer model into a Blender for paper feeding animation design, which specifically comprises the following steps:
the basic flow of paper operation is designed as follows: the paper conveying suction nozzle sucks paper, after the paper is conveyed to a double-sheet detection position by a conveying gripper, the paper is driven by a wire belt on a paper conveying table to feed forwards, after the paper reaches a paper gauge and is subjected to position adjustment, the conveying gripper is connected with a roller gripper, the roller gripper grips the paper, the paper continues to move along with a chain gripper after the paper rotates along with an impression roller gripper and reaches a delivery chain gripper, the gripper is loosened after the paper reaches a delivery table, and the paper reaches the delivery table;
the constructed PZ1740E offset printing machine model is imported into the Blender, and the circulation animation of paper running is realized through displacement animation, rotation animation, deformation animation and the mixed use of the displacement animation, the rotation animation and the deformation animation.
In step 3, importing the model and the animation into Unity to realize functions, specifically:
as shown in fig. 3, in the virtual experiment, multimedia resources such as various images, texts, videos and the like, buttons and UI interfaces are controlled by function scripts in a unity 3D development platform, after a user inputs information through an external device such as an operating system such as a mouse, a keyboard and the like, a virtual system makes corresponding scene and function feedback according to a monitoring event of the external device, and finally information is displayed and presented above a computer screen, so that interaction between the user and the computer is realized;
the method comprises the steps of introducing a PZ1740E offset printer model and a paper running circulating animation into a Unity 3D, designing a main system interface, a basic cognition module and a printing fault module by utilizing the Unity 3D through the PZ1740E offset printer model and the paper running circulating animation, wherein the basic cognition module comprises an equipment basic information display module, a basic theory knowledge learning module and a structure display and assembly module, the equipment basic information display module is used for displaying equipment basic information, the basic theory knowledge learning module is used for displaying printing principles, common faults and operation use information, the structure display and assembly module is used for displaying partial structure automatic disassembly, functional information introduction and assembly functions of a host machine and a paper feeder of the PZ1740E offset printer model, the printing fault module comprises a printing paper feeding process animation module and a fault analysis unit, the printing paper feeding process animation module is used for displaying paper feeding animation, the fault analysis unit is used for simulating fault analysis, and the main system interface is used for selecting modules.
A main system interface is designed by utilizing Unity 3D through a PZ1740E offset printer model and a paper running circulation animation, and the method specifically comprises the following steps:
as shown in fig. 5, a main system interface is implemented by using a UGUI, a UGUI system is provided with most UI components required for use, such as buttons, images, Text, Panel, and other controls, and the main system interface is provided with five options, which are respectively a cognitive machine module, a theoretical knowledge learning module, a structure learning module, a printing failure module, and an exit system, wherein the cognitive machine module is clicked to enter a functional scene of an equipment basic information display module, the theoretical knowledge learning module is clicked to enter the functional scene of the basic theoretical knowledge learning module, the structure learning module is clicked to enter a functional scene of a structure display and assembly module, and the printing failure module is clicked to enter the functional scene of the printing failure module;
and clicking different options by a mouse to enter the corresponding functional scenes, monitoring OnClick behaviors in an internal panel, assigning values to nextScene, and realizing the appointed scene jump.
The basic information display module of the Unity 3D design equipment is utilized through a PZ1740E offset printer model and a paper running circulation animation, and specifically comprises the following steps:
the PZ1740E offset press model is imported into the Unity 3D, and a user can drag the model to perform rotation and zooming functions through a right mouse button to help the user to quickly know the structure of a relevant position;
the equipment basic display module mainly aims to help a user to know the overall appearance and specification performance of the sheet-fed offset printing press, and the main contents include model introduction, product size, paper and plate consumable material information and the like. The basic information display function enables a user to drag a mouse to rotate, enlarge and reduce the offset printer model, and helps the user to quickly know the basic information of the offset printer.
A Unity 3D design basic theory knowledge learning module is utilized through a PZ1740E offset printer model and a paper running circular animation, and the learning module specifically comprises the following modules:
the method comprises the steps of collecting open PZ1740E offset machine video resources, realizing playing through a VideoPlayer, creating component buttons in a playing scene, compiling scripts, defining parameters to obtain a video component and a RawImage component, declaring the playing component, judging whether to be mute, setting logic of pausing playing video and logic of increasing and decreasing volume, wherein a playing list designates a target video by setting video index parameters, and the key codes of video playing in the printing process are as follows:
the structure display and assembly module of the Unity 3D design equipment is utilized through a PZ1740E offset printer model and a paper running cyclic animation, which specifically comprises the following steps:
as shown in fig. 6, the equipment structure display and assembly module divides the PZ1740E offset press model into a printing host and a paper feeder, and is provided with the functions of structural information visualization, display and hidden assembly, and automatic disassembly and assembly, wherein the automatic disassembly and assembly function relates to the printing unit, the paper delivery system and the paper feeding table of the PZ1740E offset press model;
the method comprises the following steps that a target object of a structural information visualization function is each sub-assembly part, the main target is to show the name of the part of the structure and main related information of the part, including functions, working principles, common faults, cautionary matters and the like, a collision body is added to each sub-assembly part, the content display is realized by using a GUI (graphical user interface), and then the interaction behavior between a mouse and an assembly body is judged by monitoring events of the mouse OnMouseEnter, the OnMouseExit and the OnMouseDown;
the display and hidden assembly function is that all objects and related buttons in a scene are acquired by monitoring mouse click events, Tag attributes corresponding to the objects are classified, display and hiding of each sub-assembly is carried out through Hideobj and DisplayObj events, a 'show' button and a 'hide' button are clicked to display, a current part is hidden, structural action information is displayed below, and a right 'host part' button and a 'paper feeder part' button are clicked to enter two scenes;
aiming at a printing host and a paper feeder of a PZ1740E offset press model, the automatic disassembling and assembling functions are realized by setting key points and key frames in Animation and moving the relative position of a target object model, and the disassembling effect of the disassembling printer delivery system assembly body of the printer delivery system assembly body is shown;
the automatic disassembly function is mainly used for displaying related contents of an assembly body in a hierarchical model relation, and a user can click a structure cognitive module to enter a unit structure automatic assembly module according to specific structural information. The partial assembly mainly comprises three parts, namely a printing ink roller, a roller unit (a main machine part), a printing machine delivery system and a paper conveying table of a PZ1740E offset printer model, wherein the disassembly function in the system is realized by mainly utilizing the key points and the key frame in Animation, the relative position movement of a target object model and the like, so that the disassembly effect of the disassembly printing machine delivery system assembly of the printing machine delivery system assembly is shown.
As shown in fig. 7, the printing failure module provides three major print faults of back smearing, paper folding and plate pasting to show and analyze feasibility of fault simulation applied in the virtual simulation and virtual assembly system, the printing failure module includes a printing paper feeding process animation module and a fault analysis unit, wherein the left side is the printing paper feeding process animation module, the right side is the fault analysis unit, and the printing paper feeding process animation module has the overall implementation effect: pressing the right button of the mouse to surround the observation model, clicking the button above the model to display the relevant gif information or animation information about the position, for example, clicking a powder spraying device to check the animation of the process from powder to paper, clicking an ink button to see the motion process of ink among ink rollers, clicking the functional module below, after hiding the button, hiding the bracket panel at the right side of the offset press, so that a user can observe the paper feeding process at the side, clicking an animation speed button to change the paper feeding speed, wherein the specific realization process of the camera surrounding function is as follows: controlling the distance between a camera and a watching offset press, monitoring the right button pressing event logic of a mouse, performing interpolation processing, and realizing object rotation by utilizing quaternion;
printing trouble module is including the back module of smearing dirty, paper fold module and the module of pasting the version, wherein, will the back module of smearing dirty takes place the reason design to: the specific logic design of the ink-jet printing ink is as shown in figure 8, wherein at 0-60% of positions of a powder jet control bar, the smudging traces are gradually reduced to a state with few smudging traces, and the smudging traces are changed at 60-100% of positions, and when the content of the drier is adjusted, the smudging traces are correspondingly increased, reduced or disappeared according to the content;
the URP is applied to realize the transformation of smearing marks on the paper through the state of the sample paper, the control strip is arranged and used for adjusting the powder spraying amount and the content of the drier, the input variable is adjusted through the control strip, so that the smearing of the paper is changed, the Unity 3D particle system is used for simulating the powdered ink, the effect of spraying the printing anti-sticking agent on the paper is realized, the collider is added on the paper to make the particles of the powdered ink collide with the paper, and the process of falling the powdered ink on the paper is simulated;
common reasons for the paper wrinkling module comprise problems of raw paper wrinkling, uneven gripping force of a roller gripper, difference in environment temperature and humidity and the like. In the module, the reason for paper wrinkling is designed into the fault caused by uneven gripping force of the cylinder grippers, the relative temperature and humidity of the environment are in a normal range, and the raw paper has no wrinkles. The scene displays the current environment temperature and humidity, the current state of the body paper and the paper gripper can be checked by clicking a button of 'body paper' and 'paper gripper', and after clicking a button of 'adjusting the positive cylinder paper gripper', the wrinkles of the paper disappear, and the gripping state of the paper gripper returns to normal;
the paper wrinkling module represents uneven gripping force by marking angles at the gripper of a roller of the PZ1740E offset printer model, and paper wrinkling disappears by replacing picture resources;
the plate pasting module adjusts the change of printing dots and sample sheets according to the change of printing pressure and adjusts the change of the sample sheets according to the content of ink and water;
wherein, the halftone dot change is realized by creating a shader by a graphics rendering technology, firstly acquiring UV information, directly using TillingAndOffset to realize offset, the offset is carried out corresponding to UV, separating a value in a U direction and a value in a V direction by a split node, wherein because the Tilling attribute of UV is input, UV needs to be scaled, the value returns to 1 when the UV is odd, the value returns to 0 when the UV is even, the change of a value in a vertical direction is realized, then the value is multiplied by a value in the horizontal direction to obtain a column of a checkered graph with alternate black and white, the checkered graph is the same as a vertical direction processing method, the horizontal direction is processed, except that the offset value does not need to be multiplied in the horizontal direction, finally the processed results are combined, and a fractional part is taken by a fractional method to change the processed result between 0 and 1, as shown in FIG. 9, the processed UV sample can be visually seen, are irregularly arranged like bricks.
Dynamically generating a prototype by an Ellipse method of UnityShaderGraph, dynamically adjusting the size of the prototype by exposing parameters, wherein the prototype appears as a mesh point, inputting the UV made above into a UV node of the prototype, so that a prototype of a mesh point appears, as shown in FIG. 10, controlling the value of CircleScale in C # to dynamically change the size of the current mesh point, and judging different conditions because the mesh point changes are different, wherein branch is used for judging different conditions so as to simulate the conditions of the mesh point in reality, and then controlling the value of the CircleScale in C #;
the realization principle of the printing pressure control sample sheet change situation is the same as the back smearing principle, and mainly relates to the change of printing pressure and sample sheet change, dot change and printing solid density, wherein the printing solid density mainly selects the position with more image detail change, when the adjusting pressure is smaller, the printing sample sheet is not clear in print, the dark tone layer is lost, the printing dot is smaller, the printing pressure is proper, the content of the printed sheet is normally displayed, the light and shade layer is normal, the dot size is normal, when the printing pressure is overlarge, the dot is overlarge, the bright tone layer is lost, and the plate pasting phenomenon occurs;
the mode that the sample picture was changed through array mode to the ink content change realizes, and sample left side picture is normal sample picture, and sample right side picture changes along with the ink volume change: when the water quantity is small and the ink quantity is large, the phenomena of image gradation disappearance and brightness loss appear; when the amount of ink reaches the proper position, the picture of the proof is normal.
As shown in fig. 2, according to the method, a virtual assembly system of the printing press can be established, the system comprises a basic cognitive module and a printing fault module, the basic cognitive module comprises an equipment basic information display module, a basic theory knowledge learning module and a structure display and assembly module, the equipment basic information display module is used for displaying equipment basic information, the basic theory knowledge learning module is used for displaying printing principles, common faults and operation use information, the structure display and assembly module is used for displaying partial structure automatic disassembly, function information introduction and assembly functions of a host and a paper feeder of the PZ1740E offset printing press model, the printing fault module comprises a printing paper feeding process animation module and a fault analysis unit, the printing paper feeding process animation module is used for displaying paper feeding animations, and the fault analysis unit comprises a back smearing module, a back smearing module and a structure display and assembly module, A paper folding module and a printed sheet fuzzy module.
The invention provides a virtual assembly method of a printing machine based on a virtual simulation technology, which highly restores a PZ1740E sheet-fed offset press by using a three-dimensional modeling technology and an image rendering technology, realizes basic cognition, assembly and fault simulation function modules of a system by using a human-computer interaction technology and a virtual assembly technology, ensures good interaction between a user and the virtual simulation offset press and vivid presentation of fault simulation, the method reasonably integrates part of theoretical knowledge of printing, virtual assembly technology and fault simulation into the same system, not only the user can master the relevant theoretical knowledge, but also the system can be used as a demonstration display and exploration tool, the printing fault module can research the implementation mode and the control mode of the change of the proof, the change of the dots and the change of the smudging traces, and provides a new idea mode for the development and application content expansion of the virtual assembly system.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A virtual assembly method of a printing machine based on a virtual simulation technology is characterized by comprising the following steps:
step 1: constructing a PZ1740E offset model by 3Ds MAX software;
step 2: guiding the built PZ1740E offset printer model into a Blender for paper feeding animation design;
and step 3: and importing the model and the animation into the Unity to realize the function.
2. The virtual assembly method of the printing press based on the virtual simulation technology according to claim 1, wherein in step 1, a PZ1740E offset model is constructed by 3Ds MAX software, specifically:
the method comprises the steps of carrying out real machine data detection on a PZ1740E offset press to obtain detection data, establishing a hierarchical relation model according to the PZ1740E offset press, analyzing whether the PZ1740E offset press has the same part geometric model, assembly characteristic information and interaction characteristics through the hierarchical relation model, carrying out related structure modeling in 3Ds MAX software according to the detection data and the hierarchical relation model, wherein the transformation operation of model vertexes, line segments and planes is realized through a polygon modeling mode, the material attributes of the PZ1740E offset press are restored through a mapping, rendering and material ball mode, modeling is carried out in a mode of a next sub-assembly body after the group structure modeling, the group component detail modeling and the group modeling are completed according to the hierarchical relation model, and integrating all the sub-assembly bodies to construct a PZ1740E offset press model.
3. The virtual assembly method of the printing press based on the virtual simulation technology as claimed in claim 2, wherein in step 2, the constructed PZ1740E offset model is imported into a Blender for paper-feeding animation design, specifically:
and (3) introducing the constructed PZ1740E offset press model into the Blender, and realizing the circulation animation of paper running through the displacement animation, the rotation animation and the deformation animation.
4. The virtual assembly method of the printing press based on the virtual simulation technology as claimed in claim 3, wherein in the step 3, the models and the animations are imported into Unity for function implementation, specifically:
the PZ1740E offset model and the circular animation of the paper run were imported into Unity 3D, a main system interface, a basic cognition module and a printing fault module are designed by utilizing Unity 3D through a PZ1740E offset printer model and a paper running circulation animation, the basic cognition module comprises an equipment basic information display module, a basic theory knowledge learning module and a structure display and assembly module, the equipment basic information display module is used for displaying equipment basic information, the basic theory knowledge learning module is used for displaying printing principles, common faults and operation use information, the structure display and assembly module is used for displaying the automatic disassembly, functional information introduction and assembly functions of partial structures of a main machine and a paper feeder of the PZ1740E offset printer model, the printing fault module is used for displaying paper-feeding animation and simulating fault analysis, and the main system interface is used for selecting modules.
5. The virtual assembly method of printing press based on virtual simulation technology according to claim 4, wherein the main system interface is designed by Unity 3D through PZ1740E offset press model and paper run loop animation, specifically:
the method comprises the steps that a main system interface is realized by UGUI, five options are arranged and respectively comprise a cognitive machine module, a theoretical knowledge learning module, a structure learning module, a printing fault module and an exit system, wherein the options of the cognitive machine module correspond to an equipment basic information display module, the options of the theoretical knowledge learning correspond to the basic theoretical knowledge learning module, the options of the structure learning module correspond to a structure display and assembly module, the options of the printing fault module correspond to the printing fault module, different options are clicked by a mouse to enter corresponding functional scenes, the ClOnScene is assigned by monitoring ClOncik behaviors in an Insparent panel, and appointed scene skipping is realized.
6. The virtual assembly method of printing press based on virtual simulation technology as claimed in claim 4, wherein the Unity 3D design equipment basic information presentation module is utilized by the PZ1740E offset press model and the cyclic animation of paper running, specifically:
the Unity 3D design equipment basic information display module is utilized through the PZ1740E offset printer model and the cyclic animation of paper running, and the PZ1740E offset printer model in the equipment basic information display module is rotated, enlarged and zoomed through a mouse, so that a user can view the relevant structural position of the PZ1740E offset printer model.
7. The virtual assembly method of printing press based on virtual simulation technology according to claim 4, characterized in that the cycling animation through PZ1740E offset press model and paper run utilizes a Unity 3D design basic theory knowledge learning module, specifically:
the method comprises the steps of collecting open PZ1740E offset press video resources, playing through a VideoPlayer, creating component buttons in a playing scene, compiling scripts, defining parameters to obtain a video component and a RawImage component, declaring the playing component, judging whether to be mute, setting logic of pausing playing of videos and logic of increasing and decreasing volume, wherein a playing list specifies target videos by setting video index parameters.
8. The virtual assembly method of printing press based on virtual simulation technology as claimed in claim 4, wherein the Unity 3D design structure display and assembly module is utilized by the PZ1740E offset press model and the cyclic animation of paper running, specifically:
the structure display and assembly module divides the PZ1740E offset press model into a printing host and a paper feeder, and has the functions of structural information visualization, display and hidden assembly, and automatic disassembly and assembly;
the method comprises the steps that a target object of a structural information visualization function is each sub-assembly part, collision bodies are added to each sub-assembly part, content display is achieved through a GUI (graphical user interface), interaction behaviors between a mouse and an assembly body are judged through monitoring of mouse OnMouseEnter, OnMouseExit and OnMouseDown events, and main information of each sub-assembly part is displayed;
the display and hidden assembly function acquires all objects and related buttons in a scene by monitoring mouse click events, classifies the Tag attributes corresponding to the objects, and displays and hides all sub-assemblies through Hideobj and DisplayObj events;
the automatic disassembly and assembly function is implemented for the printing host and the paper feeder of the PZ1740E offset press model by setting key points and key frames in Animation and moving the relative positions of the target object model.
9. The virtual assembly method of printing press based on virtual simulation technology according to claim 4, wherein the printing fault module is designed by Unity 3D through PZ1740E offset press model and paper run cyclic animation, specifically:
the printing fault module comprises a back smearing module, a paper fold module and a pasting module which are respectively used for simulating back smearing, paper fold and pasting faults in the process of printing and paper moving animation, the back smearing module realizes the transformation of smearing traces on paper by applying URP (universal procedure for sheet) through a sample state, a control strip is arranged for adjusting the powder spraying amount and the drier content, the input variable is adjusted through the control strip to enable the paper to be smeared to be changed, a Unity 3D particle system is used for simulating powdered ink to realize the effect of spraying the printing anti-sticking agent on the paper, a collider is added on the paper to enable particles of the powdered ink to collide with the paper, and the process of enabling the powdered ink to fall on the paper is simulated;
the paper wrinkling module represents uneven gripping force by marking angles at the gripper of a roller of the PZ1740E offset printer model, and paper wrinkling disappears by replacing picture resources;
the printing paste module adjusts printing screen points and sample sheet changes according to printing pressure changes and adjusts sample sheet changes according to ink content, wherein the screen point changes are achieved by creating a shader through a graphic rendering technology, and the ink content changes are achieved by changing a sample sheet picture in an array mode.
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