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英文翻译
英文翻译 High-speed machining is an advanced manufacturing technology, different from the traditional processing methods. The spindle speed, cutting feed rate, cutting a small amount of

units within the time of removal of material has increased three to six times. With high efficiency, high precision and high quality surface as the basic characteristics of the automobile industry, aerospace, mold manufacturing and instrumentation industry, such as access to a wide range of applications, has made significant economic benefits, is the contemporary importance of advanced manufacturing technology. For a long time, people die on the processing has been using a grinding or milling EDM (EDM) processing, grinding, polishing methods. Although the high hardness of the EDM machine parts, but the lower the productivity of its application is limited. With the development of high-speed processing technology, used to replace high-speed cutting, grinding and polishing process to die processing has become possible. To shorten the

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英文翻译
processing cycle, processing and reliable quality assurance, lower processing costs. 1 One of the advantages of high-speed machining High-speed machining as a die-efficient manufacturing, high-quality, low power consumption in an advanced manufacturing technology. In conventional machining in a series of problems has plagued by high-speed machining of the application have been resolved. 1.1 Increase productivity High-speed cutting of the spindle speed, feed rate compared withtraditional machining, in the nature of the leap, the metal removal rate increased 30 percent to 40 percent, cutting force reduced by 30 percent, the cutting tool life increased by 70% . Hardened parts can be processed, a fixture in many parts to be completed rough, semi-finishing and fine, and all other processes, the complex can reach parts of the surface quality requirements, thus increasing the processing productivity and competitiveness of products in the market.
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1.2 Improve processing accuracy and surface quality High-speed machines generally have high rigidity and precision, and other characteristics, processing, cutting the depth of small, fast and feed, cutting force low, the workpiece to reduce heat distortion, and high precision machining, surface roughness small. Milling will be no high-speed processing and milling marks the surface so that the parts greatly enhance the quality of the surface. Processing Aluminum when up Ra0.40.6um, pieces of steel

processing at upto Ra0.2 ~ 0.4um. 1.3 Cutting reduce the heat Because the main axis milling machine high-speed rotation, cutting a shallow cutting, and feed very quickly, and the blade length of the workpiece contacts and contact time is very short, a decrease of blades and parts of the heat conduction. High-speed cutting by dry milling or oil cooked up absolute (mist) lubrication system, to avoid the traditional processing tool in contact with the workpiece and a lot of shortcomings to ensurethat the tool is not high

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英文翻译
temperature under the conditions of work, extended tool life.

1.4 This is conducive to processing thin-walled parts High-speed cutting of small cutting force, a higher degree of stability, Machinable with high-quality employees compared to the company may be very good, but other than the company's employees may Suanbu Le outstanding work performance. For our China practice, we use the models to determine the method of staff training needs are simple and effective. This study models can be an external object, it can also be a combination of internal and external. We must first clear strategy for the development of enterprises. Through the internal and external business

environment and organizational resources, such as analysis, the future development of a clear business goals and operational priorities. According to the business development strategy can be compared to find the business models, through a comparative analysis of the finalization of
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business

models.

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determining business models, a, is the understanding of its development strategy, or its market share and market growth rate, or the staff of the situation, and so on, according to the companies to determine the actual situation. As enterprises in different period of development, its focus is different, which means that enterprises need to invest the manpower and financial resources the focus is different. So in a certain period of time, enterprises should accurately selected their business models compared with the departments and posts, so more practical significance, because the business models are not always good, but to compare some aspects did not have much practical significance, Furthermore This can more fully concentrate on the business use of limited resources. Identify business models, and then take the enterprise of the corresponding departments and staff with the business models for comparison, the two can be found in the performance gap, a comparative analysis to find reasons, in accordance with this business reality, the final identification of

training needs. The cost of training is needed, if

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not through an effective way to determine whether companies need to train and the training of the way, but blind to training, such training is difficult to achieve the desired results. A comparison only difference between this model is simple and practical training. 1.5 Can be part of some alternative technology, such as EDM, grinding high intensity and high hardness processing High-speed cutting a major feature of high-speed cutting machine has the hardness of HRC60 parts. With the use of coated carbide cutter mold processing, directly to the installation of a hardened tool steel processing forming, effectively avoid the installation of several parts of the fixture error and improve the parts of the geometric location accuracy. In the mold of traditional processing, heat treatment hardening of the workpiece required EDM, high-speed machining replace the traditional method of cutting the processing, manufacturing process possible to omit die in EDM, simplifying the

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英文翻译
processing technology and investment costs . High-speed milling in the precincts of CNC machine tools, or for processing centre, also in the installation of high-speed spindle on the general machine tools. The latter not only has the processing capacity of general machine tools, but also for high-speed milling, a decrease of investment in equipment, machine tools increased flexibility. Cutting high-speed processing can improve the efficiency, quality improvement, streamline processes, investment and machine tool investment and maintenance costs rise, but comprehensive, can significantly increase economic efficiency.

2 High-speed milling High-speed milling the main technical high-speed cutting technology is cutting the development direction of one of it with CNC technology, microelectronic technology, new materials and new technology, such as technology development to a higher level. High-speed machine tools and
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英文翻译
high-speed tool to achieve high-speed cutting is the prerequisite and basic conditions, in high-speed machining in the performance of high-speed machine tool material of choice and there are strict requirements. 2.1 High-speed milling machine in order to achieve high-speed machining General use of highly flexible high-speed CNC machine tools, machining centers, and some use a dedicated high-speed milling, drilling. At the same time a high-speed ma chine tool spindle system and

high-speed feeding system, high stiffness of the main characteristics of high-precision targeting and high-precision interpolation functions, especially high-precision arc interpolation function.

High-speed machining systems of the machine a higher demand, mainly in the following areas: General use of highly flexible high-speed CNC machine tools, machining centers, and some use a dedicated high-speed milling, drilling. At the same time a high-speed machine tool spindle system and

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英文翻译
high-speed feeding system, high stiffness of the main characteristics of high-precision targeting and high-precision interpolation functions, especially high-precision arc interpolation function. High-speed machining systems of the machine a higher demand, mainly in the following areas: High-speed milling machine must have a high-speed spindle, the spindle speed is generally 10000 ~ 100000 m / min, power greater than 15 kW. But also with rapid speed or in designated spots fast-stopping performance. The main axial space not more than 0 .0 0 0 2 m m. Often using high-speed spindle-hydrostatic bearings, air pressure-bearing, mixed ceramic bearings, magnetic bearing structure of the form. Spindle cooling general use within the water or air cooled. High-speed processing machine-driven system should be able to provide 40 ~ 60 m / min of the feed rate, with good acceleration characteristics, can provide 0.4 m/s2 to 10 m/s2 acceleration and deceleration. In order to obtain goodprocessing quality, high-speed cutting machines must have a high enough

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英文翻译
stiffness. Machine bed material used gray iron, can also add a high-damping base of concrete, to prevent cutting tool chatter affect the quality of processing. A high-speed data transfer rate, can automatically increase slowdown. Processing technology to improve the processing and cutting tool life. At present high-speed machine tool manufacturers, usually in the general machine tools on low speed, the feed of the rough and then proceed to heat treatment, the last in the high-speed machine on the half-finished and finished, in improving the accuracy and efficiency at the same time, as far as possible to reduce processing Cost. 高速切削加工是一种先进制造技术,不同于传统加工方式。它的主轴 转速高、切削进给速度高、切削量小,单位时间内的材料切除量却增 加 3~6 倍。它以高效率、高精度和高表面质量为基本特征,在汽车 工业、航空航天、模具制造和仪器仪表等行业中获得了广泛的应用, 取得了重大的经济效益, 是当代先进制造技术的重要应用。 长期以来, 人们对模具的加工一直采用铣削一磨削或者电火花(EDM)加工、打 磨、抛光的方法。虽然电火花可加工硬度很高的工件,但较低的生产 率使它的应用受到制。随着高速加工技术的发展,采用高速切削取代 磨削抛光和电加工进行模具加工已成为可能。使加工周期大为缩短,
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加工质量得到可靠保证,加工成本降低。

1 高速切削加工的优势 高速切削加工作为模具制造中集高效、优质、低耗于一身的先进制造 技术。在常规切削加工中备受困扰的一系列问题,通过高速切削加工 的应用得到了解决。 1.1 提高生产率 高速切削的主轴转速、进给速度与传统切削加工相比,发生了本质性 的飞跃,其金属切除率提高了 30%~40%,切削力降低了 30%,刀具 的切削寿命提高了 70%。还可加工淬硬零件,许多零件一次装夹可完 成粗、半精和精加工等全部工序,对复杂型面也能达到零件表面质量 要求,进而提高了加工生产率和产品的市场竞争力。 1.2 改善加工精度和表面质量 高速机床普遍具备高刚性和高精度等特点,加工时切削深度小,而进 给速度较快,切削力低,工件热变形减少,而加工精度很高,表面粗 糙度很小。高速铣削可获得无铣痕的加工表面,使零件表面质量大大 提高。加工铝合金时可达 Ra0.40.6um,加工钢件时可达 Ra0.2~ 0.4um。

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1.3 减少切削产生的热量 因为铣床主轴高速旋转,切削加工是浅切削,同时进给速度很快,刀 刃和工件的接触长度和接触时间非常短,减少了刀刃和工件的热传 导。高速切削采用干铣或油一气(油雾)润滑系统,避免了传统加工 时在刀具和工件接触处产生大量热的缺点, 保证刀具在温度不高的条 件下工作,延长了刀具的使用寿命。 1.4 有利于加工薄壁零件 高速切削时的切削力小,有较高的稳定性,可加工高质量同本公司内 部员工相比可能是非常优秀的, 但是同其他的公司的员工相比工作绩 效可能算不了优秀。就我们中国实际来说,我们使用标杆分析法来确 定员工培训需求是简单有效的。这种学习标杆对象可以是外部的,也 可以是内部和外部的结合。首先要明确企业的发展战略。通过对企业 内外部环境和组织资源等分析,明确企业未来发展的目标和业务重 点。根据企业的发展战略寻找可以比照的标杆企业,通过比较分析, 最后确定标杆企业。 在确定标杆企业后, 有一项, 是了解其发展战略, 还是其市场占有率和市场增长率,还是员工各方面的情况等等,这要 根据本企业的实际情况来确定。由于企业在不同的发展时期,其着力 点是不同的,即企业需要投入的物力人力财力的重点是不同的。所以 在一定的时期内,企业要准确地选定其跟标杆企业比较的部门和岗 位,这样更加具有实际意义,因为标杆企业并不是处处都好,而且有 些方面进行比较没有多少实际意义, 再者这样可以更充分地集中利用
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英文翻译
企业的有限资源。确定标杆企业后,然后拿本企业的相应的部门和员 工同标杆企业进行比较, 可以发现两者在工作绩效的差距, 比较分析, 寻找原因,根据本企业的实际,最后确定培训需求。培训是需要成本 的,如果没有通过有效的方式,去确定企业是否需要培训以及培训的 方式,而是盲目进行培训,这样的培训是难以取得预期的效果。有比 较才有区别,这种培训分析模型简单实用。 1.5 可部分替代某些工艺,如电火花加工、磨削加工 高速切削的一大特点,高速切削已可加工硬度达 HRC60 的零件。采 用带涂层的硬质合金刀具加工模具, 直接将淬硬工具钢一次安装加工 成形, 有效地避免了零件多次安装造成的装 夹误差,

提高了零件的几何位置精度。在传统加工模具的工艺中,对热处理硬 化后的工件需进行电火花加工, 用高速切削加工替代传统切削的加工 方法,可以省去模具制造工艺中的电火花加工,简化了加工工艺和投 资成本。高速铣削加工可在专用的 CNC 机床或加工中心上进行,也 可在加装高速主轴的普通机床上进行。 后者不仅具有普通机床的加工 能力,而且还可进行高速铣削,减少了设备投资,增加了机床柔性。 高速切削可以使加工效率提高、质量提高、工序简化,机床投资和刀 具投资及维护费用上升,但综合比较,可以显著提高经济效益。 2 高速铣削加工

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高速铣削加工的主要技术高速切削技术是切削加工技术的发展方向 之一,它随着 C N C 技术、微电子技术、新材料和新工艺等技术的 发展而迈上更高的台阶。 高速机床和高速刀具是实现高速切削的前提 和基本条件, 在高速切削加工中对高速机床的性能和刀具材料的选择 有严格的要求。

高速铣削加工机床为了实现高速切削加工 一般采用高柔性的高速数控机床、加工中心,也有的采用专用的高速 铣、钻床。机床同时具有高速主轴系统和高速进给系统,高的主轴刚 度特性,高精度定位功能和高精度插补功能,特别是圆弧高精度插补 功能。高速切削加工对机床的工艺系统提出了更高的要求,主要表现 在以下几个方面: 高速铣削机床必须具有高速主轴,主轴的转速 10000~100000m/min,功率大于 15kW。还应具有快速升速、在指 定位置快速准停的性能。主轴的轴向间隙不大于 0 .0 0 0 2 m m 。 高速主轴常采用液体静压轴承式、空气静压轴承式、混合陶瓷轴承、 磁悬浮轴承式等结构形式。主轴冷却一般采用内部水冷或气冷。 高速加工机床的驱动系统应能够提供 40~60m/min 的进给速度, 具 有良好的加速度特性, 能够提供 0.4m/s2 到 10m/s2 的加速度和减 速度。为了获得良好的加工质量,高速切削机床必须具有足够高的刚
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度。机床床身材料采用灰铸铁,还可以在底座中添加高阻尼特性的混 凝土,以防止切削时刀具颤振影响加工质量。具有高速数据传输率, 能够自动加减速。加工工艺有利于切削加工和提高刀具寿命。目前高 速机床的厂家,通常在普通机床上进行低速、大进给的粗加工,然后 进行热处理,最后在高速机床上进行半精加工和精加工,在提高精度 和效率的同时尽可能地降低加工成本。

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