機(jī)械專(zhuān)業(yè)外文文獻(xiàn)翻譯

1、精選優(yōu)質(zhì)文檔-傾情為你奉上精選優(yōu)質(zhì)文檔-傾情為你奉上專(zhuān)心-專(zhuān)注-專(zhuān)業(yè)專(zhuān)心-專(zhuān)注-專(zhuān)業(yè)精選優(yōu)質(zhì)文檔-傾情為你奉上專(zhuān)心-專(zhuān)注-專(zhuān)業(yè)翻譯部分英文原文High-speed machining and demand for the development ofHigh-speed machining is contemporary advanced manufacturing technology an important component of the high-efficiency, High-precision and high surface quality, and other featur

2、es. This article presents the technical definition of the current state of development of Chinas application fields and the demand situation. High-speed machining is oriented to the 21st century a new high-tech, high-efficiency, High-precision and high surface quality as a basic feature, in the auto

3、mobile industry, aerospace, Die Manufacturing and instrumentation industries gained increasingly widespread application, and has made significant technical and economic benefits. contemporary advanced manufacturing technology an important component part.HSC is to achieve high efficiency of the core

4、technology manufacturers, intensive processes and equipment packaged so that it has a high production efficiency. It can be said that the high-speed machining is an increase in the quantity of equipment significantly improve processing efficiency essential to the technology. High-speed machining is

5、the major advantages : improve production efficiency, improve accuracy and reduce the processing of cutting resistance.The high-speed machining of meaning, at present there is no uniform understanding, there are generally several points as follows : high cutting speed. usually faster than that of th

6、eir normal cutting 5 -10 times; machine tool spindle speed high, generally spindle speed in -20000r/min above 10,000 for high-speed cutting; Feed at high velocity, usually 15 -50m/min up to 90m/min; For different cutting materials and the wiring used the tool material, high-speed cutting the meaning

7、 is not necessarily the same; Cutting process, bladed through frequency (Tooth Passing Frequency) closer to the machine-tool - Workpiece system the dominant natural frequency (Dominant Natural Frequency), can be considered to be high-speed cutting. Visibility high-speed machining is a comprehensive

8、concept. 1992. Germany, the Darmstadt University of Technology, Professor H. Schulz in the 52th on the increase of high-speed cutting for the concept and the scope, as shown in Figure 1. Think different cutting targets, shown in the figure of the transition area (Transition), to be what is commonly

9、called the high-speed cutting, This is also the time of metal cutting process related to the technical staff are looking forward to, or is expected to achieve the cutting speed.High-speed machining of machine tools, knives and cutting process, and other aspects specific requirements. Several were fr

10、om the following aspects : high-speed machining technology development status and trends.At this stage, in order to achieve high-speed machining, general wiring with high flexibility of high-speed CNC machine tools, machining centers, By using a dedicated high-speed milling, drilling. These equipmen

11、t in common is : We must also have high-speed and high-speed spindle system feeding system, Cutting can be achieved in high-speed process. High-speed cutting with the traditional cutting the biggest difference is that Machine-tool-workpiece the dynamic characteristics of cutting performance is stron

12、ger influence. In the system, the machine spindle stiffness, grip or form, a long knife set, spindle Broach, torque tool set, Performance high-speed impact are important factors.In the high-speed cutting, material removal rate (Metal Removal Rate, MRR), unit time that the material was removed volume

13、, usually based on the machine-tool-workpiece whether Processing System chatter. Therefore, in order to satisfy the high-speed machining needs, we must first improve the static and dynamic stiffness of machine spindle is particularly the stiffness characteristics. HSC reason at this stage to be succ

14、essful, a very crucial factor is the dynamic characteristics of the master and processing capability.In order to better describe the machine spindle stiffness characteristics of the project presented new dimensionless parameter - DN value, used for the evaluation of the machine tool spindle structur

15、e on the high-speed machining of adaptability. DN value of the so-called axis diameter per minute speed with the product. The newly developed spindle machining center DN values have been great over one million. To reduce the weight bearing, but also with an array of steel products than to the much m

16、ore light ceramic ball bearings; Bearing Lubrication most impressive manner mixed with oil lubrication methods. In the field of high-speed machining. have air bearings and the development of magnetic bearings and magnetic bearings and air bearings combined constitute the magnetic gas / air mixing sp

17、indle.Feed the machine sector, high-speed machining used in the feed drive is usually larger lead, multiple high-speed ball screw and ball array of small-diameter silicon nitride (Si3N4) ceramic ball, to reduce its centrifugal and gyroscopic torque; By using hollow-cooling technology to reduce opera

18、ting at high speed ball screw as temperature generated by the friction between the lead screw and thermal deformation.In recent years, the use of linear motor-driven high-speed system of up to Such feed system has removed the motor from workstations to Slide in the middle of all mechanical transmiss

19、ion links, Implementation of Machine Tool Feed System of zero transmission. Because no linear motor rotating components, from the role of centrifugal force, can greatly increase the feed rate. Linear Motor Another major advantage of the trip is unrestricted. The linear motor is a very time for a con

20、tinuous machine shop in possession of the bed. Resurfacing of the very meeting where a very early stage movement can go, but the whole system of up to the stiffness without any influence. By using high-speed screw, or linear motor can greatly enhance machine system of up to the rapid response. The m

21、aximum acceleration linear motors up to 2-10G (G for the acceleration of gravity), the largest feed rate of up to 60 -200m/min or higher. 2002 world-renowned Shanghai Pudong maglev train project of maglev track steel processing, Using the Shenyang Machine Tool Group Holdings Limited McNair friendshi

22、p company production plants into extra-long high-speed system for large-scale processing centers achieve . The machine feeding system for the linear guide and rack gear drive, the largest table feed rate of 60 m / min, Quick trip of 100 m / min, 2 g acceleration, maximum speed spindle 20000 r / min,

23、 the main motor power 80 kW. X-axis distance of up to 30 m, 25 m cutting long maglev track steel error is less than 0.15 mm. Maglev trains for the smooth completion of the project provided a strong guarantee for technologyIn addition, the campaign machine performance will also directly affect the pr

24、ocessing efficiency and accuracy of processing. Mold and the free surface of high-speed machining, the main wiring with small cut deep into methods for processing. Machine requirements in the feed rate conditions, should have high-precision positioning functions and high-precision interpolation func

25、tion, especially high-precision arc interpolation. Arc processing is to adopt legislation or thread milling cutter mold or machining parts, the essential processing methods.Cutting Tools Tool Material development high-speed cutting and technological development of the history, tool material is conti

26、nuous progress of history. The representation of high-speed cutting tool material is cubic boron nitride (CBN). Face Milling Cutter use of CBN, its cutting speed can be as high as 5000 m / min, mainly for the gray cast iron machining. Polycrystalline diamond (PCD) has been described as a tool of the

27、 21st century tool, It is particularly applicable to the cutting aluminum alloy containing silica material, which is light weight metal materials, high strength, widely used in the automobile, motorcycle engine, electronic devices shell, the base, and so on. At present, the use of polycrystalline di

28、amond cutter Face Milling alloy, 5000m/min the cutting speed has reached a practical level. In addition ceramic tool also applies to gray iron of high-speed machining; Tool Coating : CBN and diamond cutter, despite good high-speed performance, but the cost is relatively high. Using the coating techn

29、ology to make cutting tool is the low price, with excellent mechanical properties, which can effectively reduce the cost. Now high-speed processing of milling cutter, with most of the wiring between the Ti-A1-N composite technology for the way of multi-processing, If present in the non-ferrous metal

30、 or alloy material dry cutting, DLC (Diamond Like Carbon) coating on the cutter was of great concern. It is expected that the market outlook is very significant; Tool clamping system : Tool clamping system to support high-speed cutting is an important technology, Currently the most widely used is a

31、two-faced tool clamping system. Has been formally invested as a commodity market at the same clamping tool system are : HSK, KM, Bigplus. NC5, AHO systems. In the high-speed machining, tool and fixture rotary performance of the balance not only affects the precision machining and tool life. it will

32、also affect the life of machine tools. So, the choice of tool system, it should be a balanced selection of good products. Process Parameters Cutting speed of high-speed processing of conventional shear velocity of about 10 times. For every tooth cutter feed rate remained basically unchanged, to guar

33、antee parts machining precision, surface quality and durability of the tool, Feed volume will also be a corresponding increase about 10 times, reaching 60 m / min, Some even as high as 120 m / min. Therefore, high-speed machining is usually preclude the use of high-speed, feed and depth of cut small

34、 cutting parameters. Due to the high-speed machining cutting cushion tend to be small, the formation of very thin chip light, Cutting put the heat away quickly; If the wiring using a new thermal stability better tool materials and coatings, Using the dry cutting process for high-speed machining is t

35、he ideal technology program.High-speed machining field of applicationFlexible efficient production lineTo adapt to the needs of new models, auto body panel molds and resin-prevention block the forming die. must shorten the production cycle and reduce the cost of production and, therefore, we must ma

36、ke great efforts to promote the production of high-speed die in the process. SAIC affiliated with the company that : Compared to the past, finishing, further precision; the same time, the surface roughness must be met, the bending of precision, this should be subject to appropriate intensive manual

37、processing. Due to the extremely high cutting speed, and the last finishing processes, the processing cycle should be greatly reduced. To play for machining centers and boring and milling machining center category represented by the high-speed machining technology and automatic tool change function

38、of distinctions Potential to improve processing efficiency, the processing of complex parts used to be concentrated as much as possible the wiring process, that is a fixture in achieving multiple processes centralized processing and dilute the traditional cars, milling, boring, Thread processing dif

39、ferent cutting the limits of technology, equipment and give full play to the high-speed cutting tool function, NC is currently raising machine efficiency and speed up product development in an effective way. Therefore, the proposed multi-purpose tool of the new requirements call for a tool to comple

40、te different parts of the machining processes, ATC reduce the number of ATC to save time, to reduce the quantity and tool inventory, and management to reduce production costs. More commonly used in a multifunctional Tool, milling, boring and milling, drilling milling, drilling-milling thread-range t

41、ool. At the same time, mass production line, against the use of technology requires the development of special tools, tool or a smart composite tool, improve processing efficiency and accuracy and reduced investment. In the high-speed cutting conditions, and some special tools can be part of the pro

42、cessing time to the original 1 / 10 below, results are quite remarkable. HSC has a lot of advantages such as : a large number of materials required resection of the workpiece with ultrafine, thin structure of the workpiece, Traditionally, the need to spend very long hours for processing mobile workp

43、iece and the design of rapid change, short product life cycle of the workpiece, able to demonstrate high-speed cutting brought advantages.中文譯文高速切削加工的發(fā)展及需求高速切削加工是當(dāng)代先進(jìn)制造技術(shù)的重要組成部分，擁有高效率、高精度及高表面質(zhì)量等特征。本文介紹此技術(shù)的定義、發(fā)展現(xiàn)狀、適用領(lǐng)域以及中國(guó)的需求情況。高速切削加工是面向21世紀(jì)的一項(xiàng)高新技術(shù)，它以高效率、高精度和高表面質(zhì)量為基本特征，在汽車(chē)工業(yè)、航空航天、模具制造和儀器儀表等行業(yè)中獲得了愈來(lái)愈廣泛

44、的應(yīng)用，并已取得了重大的技術(shù)經(jīng)濟(jì)效益，是當(dāng)代先進(jìn)制造技術(shù)的重要組成部分。高速切削是實(shí)現(xiàn)高效率制造的核心技術(shù)，工序的集約化和設(shè)備的通用化使之具有很高的生產(chǎn)效率。可以說(shuō)，高速切削加工是一種不增加設(shè)備數(shù)量而大幅度提高加工效率所必不可少的技術(shù)。高速切削加工的優(yōu)點(diǎn)主要在于：提高生產(chǎn)效率、提高加工精度及降低切削阻力。 有關(guān)高速切削加工的含義，目前尚無(wú)統(tǒng)一的認(rèn)識(shí)，通常有如下幾種觀點(diǎn)：切削速度很高，通常認(rèn)為其速度超過(guò)普通切削的5-10倍；機(jī)床主軸轉(zhuǎn)速很高，一般將主軸轉(zhuǎn)速在10000-20000r/min以上定為高速切削；進(jìn)給速度很高，通常達(dá)15-50m/min，最高可達(dá)90m/min；對(duì)于不同的切削材料和所釆

45、用的刀具材料，高速切削的含義也不盡相同；切削過(guò)程中，刀刃的通過(guò)頻率(Tooth Passing Frequency)接近于“機(jī)床刀具工件”系統(tǒng)的主導(dǎo)自然頻率(Dominant Natural Frequency)時(shí)，可認(rèn)為是高速切削?？梢?jiàn)高速切削加工是一個(gè)綜合的概念。1992年，德國(guó)Darmstadt工業(yè)大學(xué)的H. Schulz教授在CIRP上提出了高速切削加工的概念及其涵蓋的范圍，如圖1所示。認(rèn)為對(duì)于不同的切削對(duì)象，圖中所示的過(guò)渡區(qū)(Transition)即為通常所謂的高速切削範(fàn)圍，這也是當(dāng)時(shí)金屬切削工藝相關(guān)的技術(shù)人員所期待或者可望實(shí)現(xiàn)的切削速度。高速切削加工對(duì)機(jī)床、刀具和切削工藝等方面都有

46、一些具體的要求。下面分別從這幾個(gè)方面闡述高速切削加工技術(shù)的發(fā)展現(xiàn)狀和趨勢(shì)。現(xiàn)階段，為了實(shí)現(xiàn)高速切削加工，一般釆用高柔性的高速數(shù)控機(jī)床、加工中心，也有釆用專(zhuān)用的高速銑、鉆床。這些設(shè)備的共同之處是：必須同時(shí)具有高速主軸系統(tǒng)和高速進(jìn)給系統(tǒng)，才能實(shí)現(xiàn)材料切削過(guò)程的高速化。高速切削與傳統(tǒng)切削最大的區(qū)別是，“機(jī)床刀具工件”系統(tǒng)的動(dòng)態(tài)特性對(duì)切削性能有更強(qiáng)的影響力。在該系統(tǒng)中，機(jī)床主軸的剛度、刀柄形式、刀長(zhǎng)設(shè)定、主軸拉刀力、刀具扭力設(shè)定等，都是影響高速切削性能的重要因素。 在高速切削中，材料去除率(Metal Removal Rate，MRR)，即單位時(shí)間內(nèi)材料被切除的體積，通常受限于“機(jī)床-刀具-工件”工藝

47、系統(tǒng)是否出現(xiàn)“顫振”。因此，為了滿(mǎn)足高速切削加工的需求，首先要提高機(jī)床動(dòng)靜剛度尤其是主軸的剛度特性?，F(xiàn)階段高速切削之所以能夠成功，一個(gè)很關(guān)鍵的因素在于對(duì)系統(tǒng)動(dòng)態(tài)特性問(wèn)題的掌握和處理能力。為了更好地描述機(jī)床主軸的剛度特性，工程上提出新的無(wú)量綱參數(shù)DN值，用以評(píng)價(jià)機(jī)床的主軸結(jié)構(gòu)對(duì)高速切削加工的適應(yīng)性。所謂DN值即“主軸直徑與每分鐘轉(zhuǎn)速之積”。新近開(kāi)發(fā)的加工中心主軸DN值大都已超過(guò)100萬(wàn)。為了減輕軸承的重量，還釆用了比鋼制品要輕得多的陶瓷球軸承；軸承潤(rùn)滑方式大都釆用油氣混合潤(rùn)滑方式。在高速切削加工領(lǐng)域，目前已開(kāi)發(fā)空氣軸承和磁軸承以及由磁軸承和空氣軸承合并構(gòu)成的磁氣/空氣混合主軸。 在機(jī)床進(jìn)給機(jī)構(gòu)方

48、面，高速切削加工所用的進(jìn)給驅(qū)動(dòng)機(jī)構(gòu)通常都為大導(dǎo)程、多頭高速滾珠絲槓，滾珠釆用小直徑氮化硅（Si3N4）陶瓷球，以減少其離心力和陀螺力矩；釆用空心強(qiáng)冷技術(shù)來(lái)減少高速滾珠絲槓運(yùn)轉(zhuǎn)時(shí)由于摩擦產(chǎn)生溫升而造成的絲槓熱變形。近幾年來(lái)，用直線(xiàn)電機(jī)驅(qū)動(dòng)的高速進(jìn)給系統(tǒng)問(wèn)世，這種進(jìn)給方式取消了從電動(dòng)機(jī)到工作臺(tái)溜板之間的一切中間機(jī)械傳動(dòng)環(huán)節(jié)，實(shí)現(xiàn)了機(jī)床進(jìn)給系統(tǒng)的零傳動(dòng)。由于直線(xiàn)電機(jī)沒(méi)有任何旋轉(zhuǎn)元件，不受離心力的作用，可以大大提高進(jìn)給速度。直線(xiàn)電機(jī)的另一大優(yōu)點(diǎn)是行程不受限制。直線(xiàn)電機(jī)的次極是一段一段連續(xù)鋪在機(jī)床的床身上。次極鋪到哪里，初極工作臺(tái)就可運(yùn)動(dòng)到哪里，而且對(duì)整個(gè)進(jìn)給系統(tǒng)的剛度沒(méi)有任何影響。釆用高速絲槓或直線(xiàn)電

49、機(jī)，能夠大大提高機(jī)床進(jìn)給系統(tǒng)的快速響應(yīng)。直線(xiàn)電機(jī)最高加速度可達(dá)2-10G(G為重力加速度)，最大進(jìn)給速度可達(dá)60-200m/min或更高。2002年舉世矚目的上海浦東磁懸浮列車(chē)工程中的磁浮軌道鋼梁加工，釆用沈陽(yáng)機(jī)床控股有限公司集團(tuán)中捷友誼公司廠生產(chǎn)的超長(zhǎng)進(jìn)給系統(tǒng)高速大型加工中心實(shí)現(xiàn)。該機(jī)床的進(jìn)給系統(tǒng)為直線(xiàn)導(dǎo)軌和齒輪齒條傳動(dòng)，工作臺(tái)最大進(jìn)給速度60m/min，快速行程100m/min，加速度2g，主軸最高轉(zhuǎn)速20000r/min，主電機(jī)功率80kW。其X軸的行程長(zhǎng)達(dá)30m，切削25m長(zhǎng)的磁浮軌道鋼梁誤差小于0.15mm，為磁懸浮列車(chē)工程的順利竣工提供了有力的技術(shù)保證。此外，機(jī)床的運(yùn)動(dòng)性能也將直接影響加工效率和加工精度。在模具及自由曲面的高速切削加工中，主要釆用小切深大進(jìn)給的加工方法。要求機(jī)床在大進(jìn)給速度條件