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机械毕业设计全套
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JCJD01-059@车床数控改造机床改造,机械毕业设计全套
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英文翻译 - 1 - INTRODUCTION Enhancing NC lathe reliability has become the key of survival and development for Numerical control lathe manufacture enterprise. Today machine tool market compete drastically, it is higher reliability NC lathe that can get consumer favor. Whether the numerical control lathe reliably does become user purchase the important standard. In recent years our country numerical control lathe had the quick development in the production and the application domain, but compared with the developed country there is large distance. With social production and the rapid scientific and technological development, mechanical properties and product quality improvement. Numerical control technology is one of the key technologies of modern fabrication. In our country, the research level of numerical control technology is very low, which seriously restricts the level of the manufacturing development. So it is a great thing to develop the national numerical control industry. Product upgrading has been accelerated, so the machine not only has higher accuracy and productivity, but should be able to quickly adapt to the change of product components. Production needs of CNC machine tools to promote the emergence of electronic technology, in particular the development of computer technology, CNC machine tools developed rapidly. From the first NC Machine (1952 USA) come out so far, the machine tools rate has been raised. The worlds industrial countries has generally production and application, the Japanese production of the machine tools in 1988, the rate had already reached 70%. From the opening up of China to enliven, the CNC machine tools to speed up the introduction of technology to promote Chinas CNC technology popularization and development. Current universal application of micro-computer numerical control machine tools, integrating electronic technology, computer technology, automation technology, Measurement techniques and machinery manufacturing, and other aspects of the latest result is a flexible and efficient automated machine tools, Mechatronics is a typical one of nts英文翻译 - 2 - the products. Major enterprises set up CNC machine tools to expand production and the replacement of obsolete equipment. NC machine continuously improve the penetration rate and under such circumstances, the general transformation of CNC machine tools is necessary from the following note. NC machine tools can be used to solve complex shape, precision, small-batch processing volatile components, can Stability of the processing quality and production efficiency, but the application of CNC machine tools or by other conditions. expensive CNC machine tools, a one-time huge investment for SMEs often powerless. enterprises now have a large number of general machine tools, complete with CNC machine tools is simply impossible to replace, but Irreplaceable machine idle up as a result of waste. domestic ordering new CNC machine delivery cycle is long, often fail to meet production needs. CNC machine tools through the production of specific redundant functions. To better solve the above problems, should follow the general Lathe road, some industrialized countries from the experience, CNC machine tools are essential transformation, the transformation of NC machine tools account for a large proportion. Such as : Japans largest enterprises nearly 30% of CNC machine tools through transformation of SMEs is above 70%. In the United States there are many specialized companies NC worldwide Rebuilding provide services. As a big country Machine-To improve the machine tools for ordinary rate for NC machine tools transformation can be regarded as a good policy. Some developed countries such as Germany, the United States, Japan has attached great importance to the transformation of the old machine. it has nts英文翻译 - 3 - become a perfect integration of production, transformation of the system. Due to the continuous advancement of technology, machine transformation has become an eternal topic. China in this regard should make greater efforts to publicize out of a suit Chinas national conditions of the NC machine tools transform the road. Rebuilding savings with the purchase of new machine can be saved compared to the general 60% 80% of the costs, Large and special equipment has been particularly noticeable. General Machine major transformation will take the new machines purchase costs of 1 / 3 of the machine even if the original structure completely rebuilt or upgraded, also need spend only the purchase of new machines 60% of the costs, and can use the existing foundation. Performance is stable and reliable, based on the original machine pieces after long time, almost no impact on the stress and deformation of accuracy. CNC machine tools by the transformation, the processing can be realized automation and efficiency than traditional machine tools increased 3-7 times. Parts of the complex, the higher the degree of difficulty, the more the increase effectiveness. And can avoid using jigs and fixtures, not only cost savings, but can shorten the product cycle. Therefore, the NC general machine tools not only are necessary, but also a promising future, in particular to some particularly SMEs. Rebuilding 1.2 purpose Enterprise development equipment and production technology to achieve operational objectives material foundation. The technical performance And the technological state will not only directly affect the quality of products, but also on working hours, materials and energy used effectively Meanwhile on the economic efficiency of enterprises will have far-reaching effects. Equipment technological improvements and upgrades directly affect the technological progress, product development and market expansion. Therefore, product updates from the enterprise alternative, the development of varieties, improve quality, reduce energy consumption, improve labor productivity and economic reality, and carry out a full technical analysis, nts英文翻译 - 4 - targeted with new technological improvements and upgrades of existing equipment, is to raise the quality of enterprises, and the market competitiveness of an effective method. According to the National Industrial Census statistics, up to the end of 2000. Covering a large number of wide metal processing machine with about 3.84 million Taiwan, in which the ages of 6-15 is about 153. 20000 Taiwan, accounting for about 39. 9%, 16a easement over the age of about 133. 70000 Taiwan, accounting for about 34. 8%. This shows that our manufacturing equipment, as well as equipment from all walks of life, there is still considerable number of relatively backward. renovating or to be updated. As such, the adoption of NC technology to the general transformation of CNC machine tools, especially for Chinas machine with a large quantity, Small-scale production of specific conditions. CNC system for the selection and development (1) A CNC system the emergence and development After World War II, the United States aircraft manufacturing innovations for the copying machine on the scale and sample processing equipment, begin to develop a new type of machine. 1952, the United States Parson Corporation Parsons Co.) And the Massachusetts Institute of Technology Laboratory Servomechanism (Serve Mechanics Laboratory of TheMassachuse tts Institute of Technology), has successfully developed the first generation of CNC system. 3D for vertical milling machine. Its pulse interpolation installations multiplier, the whole control device by vacuum tubes. 1959, the advent of transistor components, NC system widely used transistor and PCB, NC Since then entered the second-generation system. In 1965, a small-scale integrated circuits, because of its smaller size, lower power, a vehicle, NC system so that the reliability will be further improved, NC system to the third generation. These systems are three generations of NC NC hard wiring system, known as the General System of NC (NC) o With the development of computer technology, a small computer alternative to dedicated hardware wiring devices, to control software NC NC functional computer system (CNC), CNC system into the fourth nts英文翻译 - 5 - generation. Before and after 1970, Intel (Intel) companies were the first to develop and use a microprocessor 4, 1974 , the United States, Japan and other countries have developed the first microprocessor to the core of the NC system, as a result, LSI integration and high reliability, low prices, microprocessor NC system has been widely used. This is the computer numerical control system, thereby enabling CNC system into a fifth generation. Modern CNC system functions in order to further extend and enhance real-time control capability and reliability, often multi - microprocessor structures, such as SIEMENS the SINUMERIK 840D and the Japanese company FANUC of FANUC series. Microprocessor constituted by a number of functional modules, each module and the interconnection between communications, or sharing bus structure, or using shared memory structure (2)NC System Development 1, High-speed, high-precision development Modern CNC system used 32 CPU and multi-CPU parallel technology, computational speed achieved greatly improved. CNC system with high-performance matched the modern CNC machine tools used for the exchange of digital servo system. Servo motor position, velocity and current loop has become digital. NC system for the interaction axis up to nine, so that the machine can process more complex linear space or surface. 2, increased reliability Modern CNC system modular, interchangeable and standardization, facilitate the organization run production, it can guarantee product quality. Modern CNC system extensively used the LSI using ASIC and hybrid integrated circuits, improved integration, reducing the number of components and improve the reliability. 3, the use of automatic programming technology Modern CNC system uses its own strong store and computational capabilities, (if used SINUMERIK 840DCPU Pentn iumIII processors) and many automatic functions of implantation NC programming system. In some of the new NC system, also packed a small nts英文翻译 - 6 - database technology, NC system not only makes online components with functional programming, but also in parts programming process, According to machine performance, workpiece material and parts processing, automatically choose the best tools and cutting parameters. 4,The higher the communication function To meet the automatic further development of technology, factory automation increasing scale of the request, To meet the needs of different manufacturers of different types of CNC systems networking needs, Modern CNC system continued to strengthen communications, and many remote diagnosis system with Ethernet interface functions and interfaces. Remote communications capabilities. General Motors Corporation in 1983, the Manufacturing Automation Protocol (MAP-Manufacture Automation Protocol), is one of the many communications standards, the fastest-growing one. The main features of MAP is to provide a basis for the opening of local network Many come from the facilities through the same communication protocol and interconnected, as the emergence of MAP, and promote the standardization of the communication process. Necessity for NC NC machine tools can be used to solve complex shape, precision, small and changeable parts processing problems. To be stable processing and improved productivity, but the application of CNC machine tools also have other restrictions. A CNC machine is expensive, a one-time huge investment for SMEs is often felt helpless. 2 At present, enterprises are a lot of general machine tools, complete with CNC machine tools is simply impossible to replace. and the replacement machine will be idle, its a waste. 3In the country, ordering new CNC machine delivery cycle is long, often fail to meet the urgent need of production. nts英文翻译 - 7 - 4 General NC machine tools for the production of specific redundant functions. To better solve the above problems, should follow the general Lathe road. abroad has become an emerging industrial sector, as early as the 1960s, has started to develop very rapidly, and specialized enterprises that have business operations. From the United States, Japan and other industrialized countries, the experience, the transformation of NC machine tools is also essential, CNC machine tools transform occupy a large proportion. If Japans large enterprises have 26% of CNC machine tools through transformation of SMEs is 74%. In the United States there are many specialized companies NC rest of the world with NC business transformation. China is 300 million machine, which has a large amount of machine tools for many years has produced the definitive machine, a lower degree of automation in order in recent years by automation and sophisticated equipment to update the existing machine tools, be it financial or Chinas machine factory capacity is impossible. Therefore, the general transformation of CNC machine tools and bright prospects. It is suitable for Chinas economic level, education level and production level, our equipment has become one of the major technological transformation. CNC machine tools transform the merits CNC machine tools transform generally refers to the general machine tools must do certain parts of the transformation, accompanied NC devices so that CNC machine tools with processing capacity. The transformation of its advantages are : From an increase in capital efficiency and transform the idle equipment, the machine can play the original function and the transformation of the new functional, raising machine value. 2 Adapt to multiple varieties and small batch production of parts. 3 High degree of automation, specialized, high-precision machining, high production efficiency. 4 Lower level of skill requirements. nts英文翻译 - 8 - 5 NC transformation of low-cost, good economy. 6 NC transformation of the short lead time, the urgent need to meet production CNC machine modified design steps Machine will transform ordinary NC machine tools, is a highly technical work, According to the requirements of object processing factory and the actual situation, identifying practical technological transformation program, do a good job in transforming the machine design. Its transformation of the general design works as follows 1 On the processing of object analysis, the technology program, the workpiece machining machine is the basis for the transformation, Machine transformation is the object after processing. Different shapes, different workpiece technical requirements, different processing methods, the machine demands are not identical. For example, the cylindrical shape of turning parts can be used, such as cylindrical grinding method for processing, usually with planar milling, Plane processing methods such as grinding; the accuracy and surface roughness require general outside cylindrical surface, often turning; and high accuracy and surface roughness required to be at the low Cylindrical Grinder processing. In the process, based on analysis of the map drawing process, cutting the amount initially selected, the cutter campaign line, calculating productivity. Then calculate the cutting force and cutting power calculation system of up to the needs of power and torque. This is driven options and components on the basis of analogy with the current multi-Determination Act or completed. 2 Analysis was transforming machine tools, machine tools to determine the type of reform, transformation and Machine Design Machine is different. Machine design is based on the design tasks, the unit of machine design, and then the components of the machine is, components to create one by one, finally loaded into machine tools, and machine tools transformation is centered on a machine for work, Machine must consider not only the transformation of the structure itself, we must also consider the process of system tools, and other auxiliary fixture with the improvement, to meet production needs. Machine nts英文翻译 - 9 - transformation in developing programs, first designated in accordance with the process, initially selected by the transformation of machine types, Then the selected machine careful analysis, to understand the transformation of the technical specifications for machine tools, technical status, Contact ministries such as size, analysis machine strength and stiffness, Analysis of machine tool can be transformed meet requirements of the economic reform and so on. Finalized been transformed machine models. 3 Elaboration of technical measures to develop rehabilitation programs under the requirements of object processing and transformation of the actual machine, develop measures to be taken, the designated machine from the transformation program, to choose to purchase pieces, we must ensure quality. In designing technical measures, the designated rehabilitation programs in the process, we should fully techno-economic analysis, seeks to transform the machine not only to satisfy the requirements of technical performance, but also access to the best value for money, so that the advanced technology and economy better way. 4 Design or selection of NC devices to meet the requirements of the processing components, designed to make the NC device functions, stable and reliable, common good, low price, or better use of domestic production dedicated NC devices. 5 Modified for machine tool design 6 Drawing Machine transformation of the map. 7 Unit installation. The NC machine plays a very great role in mechanical engineering.Although the investment needs a great deal of money,it is a good way to try digital modification for ordinary lathe. It also tells us how to improve the spindle and the control system of CA6140 NC lathe
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