数控毕业论文文案夏天英文

数控技术及数控机床在当今机械制造业中的重要地位和巨大效益，显示了其在国家基础工业现代化中的战略性作用，并已成为传统机械制造工业提升改造和实现自动化、柔性化、集成化生产的重要手段和标志。数控技术及数控机床的广泛应用，给机械制造业的产业结构、产品种类和档次以及生产方式带来了革命性的变化。数控机床是现代加工车间最重要的装备。它的发展是信息技术(1T)与制造技术(MT)结合发展的结果。现代的CAD/CAM、FMS、CIMS、敏捷制造和智能制造技术，都是建立在数控技术之上的。掌握现代数控技术知识是现代机电类专业学生必不可少的。 Technology and numerical control lathe important position and enormous benefit in nowadays mechanical manufacturing industry of numerical control, have revealed its strategic function in modernization of national basic industries, and has already become traditional machine building industry and promoted and transformed and realized automation, flexibility, integrated important means and sign that produces. The wide application of the technology of numerical control and numerical control lathe, has brought the revolutionary change to the industrial structure, product category, grade and mode of production of the mechanical manufacturing industry. Process the most important equipment of workshop modernly with numerical control lathe. Its development is the information technology (1T), with the result of combining development of the manufacturing technology (MT). Modern CAD/CAM, FMS, CIMS, making quickly and intellectual manufacturing technology, are all based on technology of numerical control. It is that it is essential for the professional students of modern electromechanics to master the technological knowledge of modern numerical control.本次设计内容介绍了数控加工的特点、加工工艺分析以及数控编程的一般步骤。并通过一定的实例详细的介绍了数控加工工艺的分析方法。 Design the content to introduce characteristic, preparation method analysis and general step of numerical control programming processed in numerical control this time. And through the introduction numerical control preparation method analytical method that certain embodiment is detailed.关键词： 数控技术 加工工艺 编程Keyword: Technology of numerical control. Preparation method. Programming

机械的资料华文版本 is the branch of physics concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effect of the bodies on their discipline has its roots in several ancient civilizations. During the early modern period, scientists such as Galileo, Kepler, and especially Newton, laid the foundation for what is now known as Classical is the original discipline of physics, dealing with the macroscopic world that humans perceive. It is therefore a huge body of knowledge about the natural world. Mechanics encompasses the movement of all matter in the universe under the four fundamental interactions (or forces): gravity, the strong and weak interactions, and the electromagnetic also constitutes a central part of technology, the application of physical knowledge for humanly defined purposes. In this connection, the discipline is often known as engineering or applied mechanics. In this sense, mechanics is used to design and analyze the behavior of structures, mechanisms, and machines. Important aspects of the fields of mechanical engineering, aerospace engineering, civil engineering, structural engineering, materials engineering, biomedical engineering and biomechanics were spawned from the study of versus quantumThe major division of the mechanics discipline separates classical mechanics from quantum , classical mechanics came first, while quantum mechanics is a comparatively recent invention. Classical mechanics originated with Isaac Newton's Laws of motion in Principia Mathematica, while quantum mechanics didn't appear until 1900. Both are commonly held to constitute the most certain knowledge that exists about physical nature. Classical mechanics has especially often been viewed as a model for other so-called exact sciences. Essential in this respect is the relentless use of mathematics in theories, as well as the decisive role played by experiment in generating and testing mechanics is of a wider scope, as it encompasses classical mechanics as a sub-discipline which applies under certain restricted circumstances. According to the correspondence principle, there is no contradiction or conflict between the two subjects, each simply pertains to specific situations. Quantum mechanics has superseded classical mechanics at foundational level and is indispensable for the explanation and prediction of processes at molecular and (sub)atomic level. However, for macroscopical processes classical mechanics is able to solve problems which are unmanageably difficult in quantum mechanics and hence remains useful and well versus NewtonianAnalogous to the quantum versus classical reformation, Einstein's general and special theories of relativity have expanded the scope of mechanics beyond the mechanics of Newton and Galileo, and made small corrections to them. Relativistic corrections were also needed for quantum mechanics, although relativity is categorized as a classical are no contradictions or conflicts between the two, so long as the specific circumstances are carefully kept in mind. Just as one could, in the loosest possible sense, characterize classical mechanics as dealing with "large" bodies (such as engine parts), and quantum mechanics with "small" ones (such as particles), it could be said that relativistic mechanics deals with "fast" bodies, and non-relativistic mechanics with "slow" ones. However, "fast" and "slow" are subjective concepts, depending on the state of motion of the observer. This means that all mechanics, whether classical or quantum, potentially needs to be described relativistically. On the other hand, as an observer, one may frequently arrange the situation in such a way that this is not really of mechanical bodiesThus the often-used term body needs to stand for a wide assortment of objects, including particles, projectiles, spacecraft, stars, parts of machinery, parts of solids, parts of fluids (gases and liquids), distinctions between the various sub-disciplines of mechanics, concern the nature of the bodies being described. Particles are bodies with little (known) internal structure, treated as mathematical points in classical mechanics. Rigid bodies have size and shape, but retain a simplicity close to that of the particle, adding just a few so-called degrees of freedom, such as orientation in , bodies may be semi-rigid, . elastic, or non-rigid, . fluid. These subjects have both classical and quantum divisions of instance: The motion of a spacecraft, regarding its orbit and attitude (rotation), is described by the relativistic theory of classical mechanics. While analogous motions of an atomic nucleus are described by quantum in mechanicsThe following are two lists of various subjects that are studied in that there is also the "theory of fields" which constitutes a separate discipline in physics, formally treated as distinct from mechanics, whether classical fields or quantum fields. But in actual practice, subjects belonging to mechanics and fields are closely interwoven. Thus, for instance, forces that act on particles are frequently derived from fields (electromagnetic or gravitational), and particles generate fields by acting as sources. In fact, in quantum mechanics, particles themselves are fields, as described theoretically by the wave mechanicsThe following are described as forming Classical mechanics:Newtonian mechanics, the original theory of motion (kinematics) and forces (dynamics) Lagrangian mechanics, a theoretical formalism Hamiltonian mechanics, another theoretical formalism Celestial mechanics, the motion of stars, galaxies, etc. Astrodynamics, spacecraft navigation, etc. Solid mechanics, elasticity, the properties of (semi-)rigid bodies Acoustics, sound in solids, fluids, etc. Statics, semi-rigid bodies in mechanical equilibrium Fluid mechanics, the motion of fluids Soil mechanics, mechanical behavior of soils Continuum mechanics, mechanics of continua (both solid and fluid) Hydraulics, fluids in equilibrium Applied / Engineering mechanics Biomechanics, solids, fluids, etc. in biology Statistical mechanics, large assemblies of particles Relativistic or Einsteinian mechanics, universal gravitation Quantum mechanicsThe following are categorized as being part of Quantum mechanics:Particle physics, the motion, structure, and reactions of particles Nuclear physics, the motion, structure, and reactions of nuclei Condensed matter physics, quantum gases, solids, liquids, etc. Quantum statistical mechanics, large assemblies of particles Professional organizationsApplied Mechanics Division, American Society of Mechanical Engineers Fluid Dynamics Division, American Physical Society

1、太阳像个老大老大的火球，光线灼人，公路被烈日烤得发烫，脚踏下去一步一串白烟。 The sun is like a big big fireball, scorching light, the road was roasted hot sun, go on foot a bunch of white smoke. 2、夏天，在我的印象里是清晨晶亮的露珠和夜晚繁多的星星。夕阳的光辉笼罩细纱，阵阵和风带着花香向你扑来，送给你一分惬意。 In the summer, in my impression is the morning bright dew and night of a wide variety of stars. The glow of the setting sun was spinning, and wind bursts of fragrance came to you, give you a comfortable. 3、夏天，草木特别茂盛，冬青树的叶子油亮油亮的，老榆树枝繁叶茂，给人们撑起了一片浓浓的绿阴。 Summer, especially lush vegetation, shiny shiny holly leaves, old elm tree with luxuriant foliage, give people put up a thick green shade.

引言从20世纪中叶数控技术出现以来，数控机床给机械制造业带来了革命性的变化。数控加工具有如下特点：加工柔性好，加工精度高，生产率高，减轻操作者劳动强度、改善劳动条件，有利于生产管理的现代化以及经济效益的提高。数控机床是一种高度机电一体化的产品，适用于加工多品种小批量零件、结构较复杂、精度要求较高的零件、需要频繁改型的零件、价格昂贵不允许报废的关键零件、要求精密复制的零件、需要缩短生产周期的急需零件以及要求100%检验的零件。数控机床的特点及其应用范围使其成为国民经济和国防建设发展的重要装备。