On the new development of modern mechanical manufa

2022-08-06
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At present, with the continuous development of high and new technologies such as electronics and information and the individualization and diversification of market demand, countries all over the world give priority to the research and development of mechanical manufacturing technology as a national key technology, and introduce the high-tech achievements of other disciplines into the mechanical manufacturing industry

therefore, the connotation and level of the machinery manufacturing industry are not the same as before. It is a modern manufacturing industry based on advanced manufacturing technology. Looking at the new development of modern mechanical manufacturing technology, its important characteristics are mainly reflected in its green manufacturing, computer integrated manufacturing, flexible manufacturing, virtual manufacturing, intelligent manufacturing, concurrent manufacturing, not only fair design, simple structure, easy to use, agile manufacturing and network manufacturing

1 characteristics of modern mechanical manufacturing technology (1) mechanical manufacturing science is an interdisciplinary comprehensive science developed from the organic combination of machinery, computer, information, materials, automation and other disciplines. It changes the functional structure and information system with different objects and time

(2) flexible, integrated and parallel work. Modern mechanical manufacturing system has multi-function and information intensive. It can manufacture products whose production cost is irrelevant to the batch, and can be manufactured according to the order to meet the individual requirements of the product

(3) intelligent manufacturing. It can replace the skills of skilled workers, and has the ability to learn the practical experience and knowledge of engineering technicians for many years, and can be used to solve practical production problems. Intelligent manufacturing system can give play to people's creative ability and have people's intelligence and skills. It emphasizes the general concept that people are the leader of the system. In intelligent manufacturing system, intelligence and integration are juxtaposed. Integration is an important support for intelligence. In turn, intelligence promotes the improvement of integration level

(4) the integration of design and process, and the step-by-step implementation of traditional manufacturing engineering design and process have resulted in the phenomenon of process subordination to design and separation between process and design, which has affected the development of manufacturing technology. Product design is often restricted by process conditions, manufacturing reliability, machining accuracy, surface roughness, size and so on. Therefore, design and process must be closely combined, and the process should be taken as a breakthrough to form the integration of design and process

(2. Standard configuration problem 5) precision machining solution: we can add lubricating oil between the gaps to reduce the friction coefficient between them. Technology is the key. Precision and ultra precision machining technology is one of the important indicators to measure the level of advanced manufacturing technology. At present, nano machining technology represents the highest precision level of manufacturing technology

(6) in the whole process of product life cycle, modern manufacturing technology is an integrated activity and system from product concept to product formation, use and disposal of scrap. In product design, not only structural design, part design, assembly design, but also disassembly design should be emphasized. The material can be recycled when the product is scrapped. Save energy and protect the environment

(7) the combination of people, organization and technology. Modern manufacturing technology emphasizes the creativity of people and the permanence of their role; It puts forward that the technical support should be transformed into the integration of human, organization and technology; It emphasizes the role of management and strategic decision-making. In the strategic decision-making of manufacturing industry, the concept of market driven and demand driven is put forward, emphasizing that users are the core and users' demand is the key to the success of enterprises, and emphasizing the importance of rapid response to market demand

2 content and development direction of modern mechanical manufacturing technology

2.1 green manufacturing gm

green manufacturing is a modern manufacturing mode that comprehensively considers environmental impact and resource efficiency. Green manufacturing is an important embodiment of sustainable development strategy in manufacturing industry. Its goal is to make the product in the whole process of design, manufacturing, assembly, transportation, sales and use strive to achieve the optimal utilization of resources, clean production and the minimization and comprehensive utilization of waste. We should strive to realize the green cutting process. At present, this green machining process mainly focuses on not using cutting fluid, which not only pollutes the environment and endangers workers' health, but also increases the consumption of resources and energy. Dry cutting and dry grinding are generally cutting without cutting fluid in atmospheric atmosphere (nitrogen, cold air or dry electrostatic cooling technology). However, for some machining methods and workpiece combinations, dry cutting and dry grinding without cutting fluid are difficult to achieve in practice, so quasi dry cutting with very little lubrication (MQL) has emerged. At present, dry cutting and quasi dry cutting have been used in 10-15% of mass machining in Europe

2.2 computer integrated manufacturing cim

cim is to realize information integration through computers, realize modern production and manufacturing, obtain the overall benefits of enterprises, and enable enterprises to develop continuously and stably. With the popularization and application of computers, computer integrated manufacturing has become the main technology for large-scale production. Enterprises are an inseparable whole from market forecast, product design, processing and manufacturing, operation management to after-sales service, which needs to be considered as a whole. Integrated manufacturing mainly refers to:

(1) personnel integration, managers, designers, manufacturers The guarantors (personnel responsible for quality, sales, procurement, service, etc.) and users shall be integrated into a coordinated whole

(2) information integration: the acquisition, representation, processing and operation tools of various information in the product life cycle are integrated to form a unified management and control system. In particular, product information model (PIM) and product data management (PDM) should be integrated in the system

(3) function integration refers to the function integration of each department of the enterprise in the product life cycle and the function integration between product development and external collaborative enterprises

(4) technology integration refers to the integration of multidisciplinary knowledge and various technologies and methods involved in the whole process of product development to form an integrated knowledge base and method base to facilitate the implementation of CIMS

2.3 flexible manufacturing fm

flexible manufacturing system (FMS) is a group of processing equipment connected by a unified control system (information flow), materials (workpiece, cutter) and conveying system (material flow). It can realize the processing of multi variety and small batch parts without stopping the machine, and has certain management functions. Flexible manufacturing technology is the main means for manufacturing industry to adapt to the dynamic market demand and the rapid renewal of products. It is the mainstream trend of manufacturing development in various countries and the basic technology in the field of advanced manufacturing. With the maturity of numerical control technology and the advent of single numerical control equipment, many industrial developed countries have started the research of flexible manufacturing system. FMS includes many flexible manufacturing units, which can be adjusted rapidly according to the changes of manufacturing tasks and production environment. It is suitable for multi variety, medium and small batch production. The traditional idea that the economic benefit of mass production must be greater than that of single piece production has been broken through. On the basis of automation technology, information technology and manufacturing technology, FMS is an intelligent manufacturing system that integrates the independent engineering design, manufacturing and operation management processes in the past enterprises into a complete and organic system covering the whole enterprise under the support of computers and software, so as to achieve global dynamic optimization, overall high efficiency, high flexibility, and win the competition

2.4 virtual manufacturing vm

virtual manufacturing mainly uses computer technology and equipment to create a virtual environment, applies human knowledge, technology and perception, interacts with virtual objects, and comprehensively models and simulates product design and manufacturing activities. Virtual manufacturing technology has fundamentally changed the traditional manufacturing mode of design, trial production, design modification and large-scale production. Before the product is actually manufactured, the soft prototype is first produced in the virtual manufacturing environment to replace the traditional hard prototype, and the rationality of product design and manufacturing, product performance and manufacturing cycle are predicted, so that the product development and production cycle is the shortest, the cost is the lowest and the quality is the best, and finally the ability to quickly respond to market changes is improved

2.5 intelligent manufacturing im

as a mode, intelligent manufacturing technology models workers' skills and expert knowledge through knowledge engineering, software manufacturing system and robotics, and can carry out small batch production without human intervention. Its outstanding feature is that it integrates artificial intelligence into all links of the manufacturing process, analyzes, judges, infers, conceives and makes decisions with the help of simulating the intelligent activities of experts, replaces or extends part of the mental work in the manufacturing environment, and collects, stores, processes, improves, shares, inherits and develops the manufacturing intelligence of human experts

2.6 concurrent engineering ce

the essence of concurrent engineering is to fully predict the "performance" of the product in the manufacturing, assembly, sales, use, after-sales service, scrapping, recycling and other links at the product design stage, find possible problems, and timely modify and optimize them. The purpose of concurrent engineering is to reduce the detours and iterations in product development, shorten the product cycle, and even achieve a successful product development. In the traditional serial development process, problems or deficiencies in the design can only be found in the processing, assembly or after-sales service. Then Jiang went back to modify the design and improve the processing, assembly or after-sales service (including maintenance service). Concurrent engineering is the combination of design, process and manufacturing, and uses computers to interconnect and parallel operations, which greatly shortens the production cycle

2.7 agile manufacturing am

the viability and competitiveness of manufacturing automation system largely depend on its ability to produce different types of products with low cost and high quality in a very short development cycle, so as to face the challenges of the market. Agile manufacturing is the integration of flexible production technology and skilled labor force with flexible management to promote cooperation within and among enterprises. Through the established common infrastructure, it can quickly respond to the rapidly changing or unpredictable market. It aims to make the enterprise have excellent self-adaptive ability in the unpredictable and continuously changing environment, so as to occupy the overall strategy of the dominant position. At the same time, it is also a production mode that makes rapid response to market demand and rapid restructuring; Agile manufacturing is a philosophy or management philosophy, which is a strategic change of enterprise management. It is characterized by manufacturing flexibility and member cooperation. Manufacturing flexibility is an integral part of agile manufacturing, including flexibility in personnel, equipment and software. Improve the overall flexibility in the whole process of product design, manufacturing and sales, so as to ensure the ability of rapid response and rapid reorganization of agile manufacturing system. At present, agile manufacturing has achieved initial success in western countries

2.8 network manufacturing nm

with the rapid development of information technology and network technology, network manufacturing, as a new mode of modern manufacturing, is increasingly becoming a hot field of manufacturing research and practice. Network manufacturing will bring a profound change to modern manufacturing. Masp (manufacturing application service provider) can provide service and Optimization for product design and manufacturing process, and can conduct virtual process simulation as product design

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