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Boxster 2013-2015 (981)
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911 Carrera 2013-2015 (991)
Macan 2015-NOW (95B)
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Package: 1 set (Left & Middle & Right part)
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Development of CNC Drilling and Milling Machine for Domestic Printed Board (Chongqing Major High-Tech Co., Ltd. 400044) Wang Yingzhang is high-speed, high-precision, high-reliability and intelligent. The development trend of flexibility and integration is more and more obvious. The platform system is more open, and the product supply is more professional and standard. From this, we can clearly see the problems and gaps of China's printed circuit board CNC drilling and milling machine and the basics of China's future. Development ideas.
In recent years, with the rapid development of China's electronic information industry and the gradual formation of the world's electronic manufacturing center in China, the printed circuit board (PCB) industry has seen a booming scene, as a key device for printed circuit board processing. The board CNC drilling and milling machine has experienced unprecedented development opportunities and encountered great challenges.
1 Development trend From the 2003 CPCA exhibition in Shanghai, we can easily see the development trend of mainstream CNC drilling and milling machines at home and abroad.
1.1 The development trend of performance 1.1.1 High speed, high precision, high speed, high precision is the basic theme of current printed circuit board processing requirements.
Wang Yingzhang, male, doctor of engineering, engineer. He is currently the general manager of the major high-tech mechanical and electrical company, mainly engaged in the research and application of enterprise information construction, as well as the research and market development of printed circuit board numerical control equipment.
With the development trend of miniaturization and miniaturization of electronic products, the development requirements of aperture, line width and line spacing of printed circuit boards are getting higher and higher. The main technical indexes of CNC drilling and milling machines (positioning accuracy, repeat positioning accuracy, minimum The aperture processing capability has been increased by an order of magnitude to varying degrees. At present, the competition in the printed board industry at home and abroad is very fierce, the output is increasing, and the profit is declining. Therefore, the processing efficiency of the machine tool must be fully improved, otherwise even if the accuracy is high, Losing economic significance.
1.1.2 High reliability, low equipment failure rate The rapid agility of the market requires the printed board manufacturers to deliver on time in a short period of time. Otherwise, the business opportunities will be delayed, and the equipment will not be allowed to go through problems.
1.1.3 System integration and degree of flexibility 篼 With the deepening of the process of social informationization, the corresponding requirements of CNC machine tools are integrated and flexible, and a series of discrete processes must be integrated into a continuous organic process. 'Adapt to the basic concept of modern manufacturing, the CNC system not only completes the usual processing functions, but also has automatic measurement, automatic loading and unloading, automatic tool change, automatic error compensation, automatic diagnosis, incoming line and networking functions, especially based on Users can easily configure and integrate flexibly according to different requirements. 1.1.4 High degree of system intelligence The intelligentization of machine tools involves all aspects of the system, in order to pursue intelligentization of processing efficiency and processing quality, such as adaptive control, automatic generation of process parameters, to improve drive performance and ease of use. Intelligent aspects, such as feedforward control, adaptive calculation of motor parameters, automatic identification of load automatic setting model, self-tuning, etc.; simplify programming, simplify operation, intelligent, such as intelligent automatic programming, intelligent people Machine interface, etc.; also has intelligent diagnosis, intelligent monitoring content, to facilitate system diagnosis and maintenance.
1.2 The machine tool control system is more and more open. Only an open architecture can have better applicability, flexibility, adaptability and expandability, and develop vigorously in the direction of intelligence and networkization. Market demand.
Only in this way can the industry level stand on the shoulders of giants and get a big development.
1.3 CNC functional components are more and more professional. At present, 90% of the core components on the machine tool are externally supported (and globally supported), and the supporting quality and supply system is very agile. This assembly supporting idea greatly improves and It promoted the level of numerical control and greatly conformed to the basic concept of economic globalization.
1.4 Market Personalization and Agility Requirements Increasingly, the consumption of I biochemical differentiation and agile speed determination requirements is a link that CNC products must consider. The evaluation system of modern products has shifted from the quality and standards of the products themselves to the maximum satisfaction of the products in the (user) market.
2 Domestic printed board CNC drilling and milling machine problems and gaps 2.1 Accuracy and speed gap accuracy is generally not high, only a few products can occasionally meet the national standard, the domestic generally can not meet the processing requirements of multi-layer board.
It is not difficult to see that the machine tool is not much different from foreign countries in terms of various functional components. The accuracy problem is only a surface phenomenon. The essence is the reflection of the fundamental technology gap. Firstly, the host part is generally not subjected to finite analysis, and no stiffness test is performed. Most of them do not use positioning accuracy software compensation technology, temperature deformation compensation technology, dynamic balancing technology of high-speed spindle system, etc., especially the basic control mode and principle of servo drag in the control system and the lack of mastery and debugging of some important parameters. The deeper level and the accumulation of the system, the important issues that match the driving link and the whole link, remain on a succinct solution.
The speed problem and the accuracy problem are a pair of contradictions. When the speed is satisfied, the accuracy will be seriously sacrificed. The pursuit of precision and not the speed will definitely be eliminated by the market.
2.2 Quality stability (reliability) gap The reliability of the CNC system is generally controlled by more than one order of magnitude, but it is not the higher the reliability, the better, it is still moderately reliable, because the goods are subject to cost-effective constraints, for two shifts per day. For an unmanned factory, if the continuous operation is required within 16 hours, and the failure-free rate P(t)=99% or more, the MTBF of the CNC machine tool must be greater than 3000 hours. The MTBF is more than 3000 hours. For the unmanned factory consisting of different numbers of CNC machine tools, the difference is mostly. For a CNC machine, for example, if the ratio of the failure rate between the main machine and the CNC system is 10:1 (CNC Reliable is an order of magnitude higher than the host). At this time, the MTBF of the numerical control system is greater than 33333.3 hours, and the MTBF of the number, spindle and drive must be greater than 100,000 hours.
At present, the MTBF value of foreign numerical control devices has reached more than 6000 hours, and the driving device has reached more than 30,000 hours. At present, there is basically no such system concept analysis in China.
2.3 Appearance and manufacturing process gap The gap between appearance and manufacturing process is comprehensive. It is not in design, but in the whole national manufacturing industry supporting aspects, including raw materials, various cold and hot manufacturing processes, debugging The assembly process, the series of quality testing methods, methods, tools, and finally the gaps in the process management model, the various methods of knowledge and experience, this is the most deadly and most basic, not a day or two. Some two people can completely change.
2.4 Product intelligence degree gap At present, China mainly stays in the basic functions of automatic tool change, broken drill, and tool setting. In various forms of error compensation, the intelligent detection of working conditions of system working parts has not entered substantive. Reliable application phase.
2.5 The gap between the secondary development capabilities of the products is currently not unified due to the product development platform, including the hardware platform of the open CNC system and the applicable operating system. The source code of all control systems is uneven, and any user and manufacturer can make secondary customizations. It is a very complicated system engineering, which seriously restricts the development of the industry.
2.6 The machine tool manufacturer has not fully understood the manufacturing process of the printed board. 3 The domestic printed board teaches the control of the drill collar. The machine tool and numerical control technology are the important bottlenecks of the manufacturing industry. It is a comprehensive manufacturing industry of the country and the nation. The comprehensive manifestation of the ability, the development of the overall development strategy and development measures in line with China's national conditions, is our (down to page 44) 21 table 6 solder mask peeling reasons analysis and corresponding countermeasures countermeasures (1) the roughness of the surface of the copper plate is insufficient The degree of pretreatment of large copper plate (2) The oxidation of the plate surface causes the ink adsorption force to be reduced. The quality of the plate is strictly controlled to prevent oxidation of the plate surface. The polished plate must be printed within 2 hours. U) The copper plate is not dried, and the water vapor is guaranteed to be processed before the plate. Thoroughly dry (4) ink and curing agent unregulated port strong oil stirring) UV curing is insufficient to check whether the UV lamp is aging, whether the exposure energy meets the process requirements (6) M shadow temperature is too high or the board is in M ​​shadow liquid Excessive residence time to strengthen the development temperature and speed control (7) post-baking temperature or time is not strict enough production records, regular inspection of the calibration oven temperature value Table 7 solder mask into the hole and corresponding Reasons for countermeasures The wall of the hole is excessively rough. The quality control hole diameter of the drilling process is small. It is difficult to remove the screen printing after the ink is inserted into the hole. The development of the oil stop point on the screen is insufficient or the nozzle pressure is insufficient. Check and adjust the development parameters. 5 Liquid photosensitive ink Summary of application defects in PCB combined with my practice in production field service, comprehensive and detailed understanding and analysis of PCB process: liquid photosensitive ink application process is complex, requires knowledge of polymer synthetic materials, and requires wire mesh Various professional skills in printing (including the preparation of silk screen printing, positioning, use of silk screen exposure equipment, etc.); also need special technology in the production of printed boards (such as basic board pretreatment, positioning exposure, development, curing and The shadow of the post-process (on page 21) is a serious problem that industry insiders must seriously face. Through the analysis of the development trend of CNC technology and printed circuit board industry and the existing problems, we believe that science and technology innovation is the forerunner. Focusing on commoditization, focusing on management and marketing, backed by technical support and services, Basic development ideas are structured from the overall strategy and technical route.
3.1 Develop CNC software As soon as possible, set up an industry technical committee, integrate industry standards, establish a development-oriented CNC platform, and formulate technical specifications for application systems. Using the platform strategy to develop China's independent CNC software.
3.2 Improve the understanding of the overall basket, the main functions of the bureau, the degree of knowledge, that is, centralized support, key breakthroughs, and drive the whole line. High-speed spindle technology; (3) software error compensation technology; (4) sensor technology; (5) precision manufacturing technology; (6) automatic detection technology; (7) network technology; (8) image processing technology.
3.3 Institutional innovation The current gap with foreign countries is not based on one or several companies that can cause problems. The drawbacks of application in production (including plating copper/nickel/gold plating, line gaps, short/open circuits, etc. and chemical nickel gold) , tin-spraying process, tin-lead plating, short/break, exposed copper, etc.) and the quality problems that arise, we must strictly control the parameters of the silk screen process, which is conducive to the discovery of the symptoms.
(1) It is necessary to observe the factors affecting the process before and after the production of printed boards;) It is necessary to have certain experience in the production of printed boards;) It is necessary to implement the work guidelines for preventive measures.
To solve the problem, we must comprehensively integrate all aspects of strength and resources from the country as a whole and the industry, and make full use of the combination of administrative means and market regulation.
3.4 Improve the scientific and technological innovation system, solve the core technology and key functional components self-contained supporting system, comprehensively enhance the international core competitiveness to master the core technology, and the basic guarantee for the supply of key functional components must rely on science and technology as the main basis to fully control the price system. To participate in international competition, we must master key functional components, otherwise we will become a serious assembly workshop.
4 Conclusion In the face of the trend of economic globalization, we must fully recognize the special opportunities for our own development, and we must calmly consider the challenges we face. If we do not recognize the shortcomings and gaps in our own existence, we will not be able to talk about them. With continuous development, we will become a labor-intensive processing and assembly workshop. At present, we only have a comprehensive economic environment, comprehensive support, key support, through scientific and technological system innovation, comprehensively enhance the international core competitiveness, fully grasp the main supporting resources and core resources, so that the prosperity of our national machine tool industry will be just around the corner.
Thoughts on the Development of CNC Drilling and Milling Machine for Domestic Printed Board
Key case for Porsche cars with original pearl powder tone style