Assembly is an important part of product manufacturing, which determines the final quality, manufacturing cost and production cycle of the product to a large extent. Since the assembly usually takes up a lot of labor and is belongs to the end of the production work, the use of advanced assembly technology has more important engineering significance for improving product production efficiency and quality. At the same time, with the rapid development of China's precision/ultra-precision machining technology, the precision and consistency of parts processing have been significantly improved, and the guarantee effect of the assembly process on product performance is becoming increasingly prominent. According to the Mechanical Engineering Discipline Development Strategy Report (2011-2020)
, "the guarantee of product assembly performance is gradually shifting from the initial design and processing links to the assembly process, and the relevant research has received wide attention from all countries in the world." China held the first Digital Flexible Assembly Technology Forum in Beijing in August 2009. In November 2017, the China Mechanical Engineering Society Production Engineering Branch established the Precision Assembly Technology Professional Committee and held the first Precision Assembly Technology Conference in Shenzhen in November. The establishment of relevant academic organizations and the convening of relevant academic assembly technology conferences further promoted the development of assembly technology and the gathering of relevant talents in China.
Product assembly technology
refers to the general term for various assembly methods, assembly processes and equipment in mechanical manufacturing. The current product assembly technology mainly includes assembly-oriented design, assembly process design and simulation, assembly process equipment, assembly measurement and inspection, assembly shop management and other research directions, in which the design is the leading, the process is the basis, the equipment is the tool, the inspection is the guarantee, Management is the means. Design is the mainstay: the assemblability and assembly performance of the product are mainly determined by the structure of the product. The design should guarantee the possibility of assembly, the structural measures adopted should give convenience to assemble to reduce the assembly workload and improve the assembly quality. Process is the foundation: Process is the main technical document to guide product assembly. The quality of assembly process design directly affects the assemblability, operation difficulty, operation time, number of fixtures and labor intensity of product assembly. Equipment is a tool: Process Equipment is an important supporting tool for automated and intelligent assembly. Testing is a guarantee: measurement and testing are direct safeguards for assembly quality. Management is the means: scientific workshop management is an important means to improve assembly efficiency and quality.
Traditional product assembly technology is mainly realized by design manuals, design specifications and trial assembly. It is a relatively backward technical method. The advent of computer and digital technology in the early 1980s greatly contributed to the rapid development of assembly technology. In particular, as the core technology of the new round of industrial revolution, the current IT manufacturing is triggering major and profound changes in the development concept and manufacturing model of the manufacturing industry. It is reshaping the manufacturing technology system, and the intelligent assembly technology of the products will also be an important part of intelligent manufacturing technology. The development trend of future product assembly technology is characterized by integration, precision, micro/nano and intelligent. Integration: In the future, with the continuous pursuit of high precision, high quality and opto-mechatronics in modern product equipment, the nonlinear and time-varying characteristics of various physical processes within the system are more prominent, and the coupling relationship between processes is more complicated, thus the system integration feature needs to be fully considered in the setup phase. The assembly of optical electromechanical integration products in the future is an integrated assembly process of multi-disciplinary parameter coupling. It is necessary to achieve optimal control of product assembly performance by constructing comprehensive optimization of multi-disciplinary assembly process parameters. Precision: Precision assembly technology is the general term for all assembly techniques with assembly accuracy up to a certain level. Precision assembly technology has become one of the important supporting technologies for aerospace high-performance weapons, precision ultra-precision machine tools, and precision test equipment. Improving product accuracy is one of the eternal pursuit goals of the mechanical manufacturing discipline. In the future, with the development of product complexity, light weight, precision and opto-mechatronics, the service environment is becoming more and more severe and limited, and assembly accuracy requirements will be higher and higher. Micro/nano: Micro-assembly techniques generally refer to the assembly of micro-scale parts or mesoscale parts with micro-scale feature sizes. With the rise of micro/nano manufacturing science, micro-assembly technology, as a key technology for the manufacture of micro-miniature products, is becoming more and more widely used in the field of precision micro-small mechanical and electrical products manufacturing. Intelligent: Intelligent assembly technology involves advanced technologies such as sensor technology, network technology, and automation technology. It is a high-tech multi-disciplinary integration of control, computer, artificial intelligence and so on.