The main content of this book includes the construction technology of virtual manufacturing system, the design of virtual manufacturing system, virtual manufacturing factory, sales and after-sales service. Virtual manufacturing, etc. The content of the book emphatically reflects the author's patents, software copyright achievements, academic papers and major scientific research achievements in the field in recent years, as well as application cases in the equipment manufacturing industry, reflecting the internationally advanced and domestic leading level of virtual technology and applications Status, such as rapid virtual design of product series, virtual prototype analysis of real parameters, virtual asset management of major equipment production, virtual planning of fast-built workshops, virtual production process optimization of large workpieces, virtual assembly guidance of complex products, virtual training of tooling operations , Customized sales demonstration, remote virtual maintenance guidance, production system virtual operation monitoring, etc.
This book can be used for reading and reference by design, manufacturing, sales and after-sales service personnel, researchers, and university teachers and students in the equipment manufacturing industry.
Chapter One Overview
Chapter Two Virtual Manufacturing System Construction Technology
Chapter Three Virtual Design
Chapter 4 Virtual Manufacturing Factory
Chapter 5 Virtual Manufacturing Service Technology
Virtual Reality technology is the use of sensory tissue simulation equipment and dynamic models of real or illusory environments to generate or create an environment or reality that people can perceive, so that people can rely on their intuition to act on computer-generated three-dimensional simulations The virtual environment of the model. Virtual Manufacturing (Virtual Manufacturing) technology based on virtual reality technology integrates design and manufacturing processes under a unified model. It integrates various processes and technologies related to product manufacturing in a three-dimensional, dynamic simulation of the real process On top of the physical digital model. Its purpose is to use modeling and simulation technology to simulate the influence of various activities in the future manufacturing process of the product and the entire life cycle of the product on product design in a timely, parallel, and Manufacturability and so on. In this way, the production can be organized more effectively, economically and flexibly, the decision-making and control level can be enhanced, and the retrospective changes brought by the pre-design to the post-manufacturing can be effectively reduced, and the product development cycle and cost can be minimized, and the product design quality can be optimized. , Maximize production efficiency.
Virtual manufacturing can also simulate imaginary manufacturing activities. It does not consume real resources and energy. The process performed is a virtual process, and the products produced are also Virtual. The application of virtual manufacturing technology will have a profound impact on the development of the future manufacturing industry. Its major role is mainly manifested as: Information flow and energy flow) are fully simulated to achieve an unprecedented high level of integration, which provides a wider space for the further development of advanced manufacturing technology, and at the same time promotes the continuous development and progress of related technologies.
●It can deepen people’s knowledge and understanding of the production process and manufacturing system, which is conducive to theoretical sublimation, and better guide actual production, that is, to optimize the production process and manufacturing system as a whole to promote A huge jump in productivity.
●In the process of mutual influence and action between virtual manufacturing and real manufacturing, the organization and management of the enterprise can be comprehensively improved, and it has an immeasurable influence on the correct decision-making. For example: you can make predictions on production plans, delivery dates, production output, etc., find problems in time and improve the actual manufacturing process.
●The application of virtual manufacturing technology will speed up the training of corporate talents. We all know that the simulated cockpit has played a good role in the training of drivers and pilots, and virtual manufacturing will also have a similar effect. For example: operation training for production personnel, emergency treatment of abnormal processes, etc. can be carried out.
Brand new concept
"Virtual manufacturing" is a brand new concept first proposed by the United States in recent years. What is virtual manufacturing? What does it include? These are still discussed today. Question. Many people have defined virtual manufacturing. Some representative ones include:
The definition of Gloria J.Wiens of the University of Florida is:
Virtual manufacturing is a concept that is related to The actual manufacturing process is executed on the computer. The virtual model is used to predict the product's function and manufacturability potential problems before the actual manufacturing.
(VM is a concept of executing manufacturing processes in computers as well as in the real world,?where?virtual models?allow for?prediction of potential problems for product functionality and manufacturability before real manufacturing occurs.)The definition emphasizes that VMs are "as in reality", "virtual models" and "predictions" , That is, focus on the results.
The definition of the U.S. Air Force Wright Laboratory is:
"Virtual manufacturing is a comprehensive application of simulation, modeling, and analysis techniques and tools to enhance each layer Manufacturing design and production decision and control. (VM is the integrated application of simulation, modeling and analysis technologies and tools to enhance manufacturing design and production decisions and control at all process levels.) This definition focuses on means.
The definition of Edward Lin&etc of the University of Maryland is:
Another representative definition is given by Edward Lin&etc of the University of Maryland, "Virtual manufacturing is a method for enhancing An integrated, comprehensive manufacturing environment for decision-making and control at all levels.” (VM is an integrated, synthetic manufacturing environment exercised to enhance all levels of decision and control.), focusing on the environment.
Obviously, the above definition emphasizes different aspects, and some people even think that there is no need to have only one definition. But in order to discuss and communicate, it is generally believed that it is necessary to define the VM.
Summary and analysis
Integrating representative international documents, the following definition of virtual manufacturing is given: virtual manufacturing is the essential realization of the actual manufacturing process on a computer, that is, using computer simulation Work with virtual reality technology in groups on computers to realize product design, process planning, processing and manufacturing, performance analysis, quality inspection, and the essential process of product manufacturing such as the management and control of all levels of the enterprise process to enhance the manufacturing process Decision-making and control capabilities at all levels.
It can be seen that although "virtual manufacturing" is not actual manufacturing, it realizes the essential process of actual manufacturing. It is a way of simulating and predicting product functions, performance and processability through computer virtual models. Increasing the level of people’s prediction and decision-making, such as possible problems in various aspects, has enabled manufacturing technology to move out of the narrow world that mainly relies on experience and develop into a new stage of omni-directional forecasting.
The research content of virtual manufacturing technology is extremely extensive. In addition to the common technologies involved in virtual reality technology, the main research content of the virtual manufacturing field itself includes:p>
●Theoretical system of virtual manufacturing;
●Three-dimensional visualization of design information and production process;
●Open architecture of virtual manufacturing system;
●Assembly simulation of virtual products;
●Man-machine collaboration in virtual environment and virtual manufacturing process, etc.
Generally speaking, the research of virtual manufacturing is related to specific application environments and objects. Due to the different requirements of applications, there are different focuses. Therefore, three schools have emerged, namely, the design is the center. Virtual manufacturing, production-centric virtual manufacturing and control-centric virtual manufacturing.
The widespread application of virtual manufacturing technology will fundamentally change the current manufacturing model and will also have a huge impact on related industries. It can be said that virtual manufacturing technology determines the future of enterprises , Also determines whether the manufacturing industry can remain invincible in the competition.
Virtual manufacturing (VM) is a new concept proposed internationally. VM and AM are closely linked. The characteristic of VM is that when new opportunities arise in the market, several related companies are organized to reorganize and coordinate work in different companies, factories or workshops in different locations. Before operation, it is necessary to analyze whether the combination is optimal, whether it can be coordinated, and evaluate the benefits and risks after it is put into production. This kind of joint company is called a virtual company. Virtual companies operate through virtual manufacturing systems under certain circumstances and conditions, including physical foundations, legal guarantees, social environments and information technology. Therefore, the research and development of virtual manufacturing technology (VMT) and virtual manufacturing system (VMS) is of great significance. The United States calls AM the development strategy of manufacturing in the 21st century.
Virtual Reality Technology (Virtual Reality Technology) mainly includes two parts: virtual manufacturing technology and virtual enterprise.
Virtual manufacturing technology will fundamentally change the traditional manufacturing model of design, trial production, design modification, and mass production. Before the product is actually manufactured, firstly generate a soft product prototype (Soft Prototype) in the virtual manufacturing environment instead of the traditional hard prototype (Hard Prototype) for testing, and predict and evaluate its performance and manufacturability, thereby shortening the product design And the manufacturing cycle, reduce the cost of product development, and improve the system's ability to quickly respond to market changes.
Virtual enterprise is to quickly respond to a certain market demand. Through the information superhighway, different enterprises involved in the product are temporarily formed into a cooperation without walls, beyond space constraints, relying on computer network connections, and unified command. Economic entities. The characteristics of a virtual enterprise are the incompleteness of the enterprise's functions, the geographical dispersion and the non-permanence of the organizational structure, that is, the virtualization of functions, the virtualization of organizations, and the virtualization of regions.
1. The product and manufacturing environment is a virtual model. The virtual model is designed, manufactured, and tested on the computer, and even the designer or user can "enter" the virtual model. The design, processing, assembly and operation of the manufacturing environment are checked without relying on the repeated modification of the traditional prototype; the developed products (components) can also be stored in the computer, which not only greatly saves storage costs, but also according to the user Demand or market changes quickly change the design and quickly put into mass production, which can greatly reduce the development time of new products, improve quality, and reduce costs.
2. Different professionals distributed in different locations and different departments can work on the same product model at the same time, communicate with each other, share information, and reduce the time and error of a large number of document generation and delivery. So that product development responds to market changes with speed, high quality and low consumption.
The application of virtual manufacturing technology will have a profound impact on the development of the future manufacturing industry. Its major role is mainly manifested as:
1 Use software to fully simulate the five elements (people, organization and management, logistics, information flow, and energy flow) in the manufacturing system.
2. It can deepen people's knowledge and understanding of the production process and manufacturing system.
3. In the process of mutual influence and action between virtual manufacturing and real manufacturing
4. The application of virtual manufacturing technology will speed up the cultivation of corporate talents.