At present, the molten gold machine using computer simulation and molecular dynamics simulation method for ultra precision cutting process and mechanism ofclose to obtain good results, it hit machine hand deepen the removal mechanism of a very thin layer of material cutting familiar, jewelry equipment at the same time onsuper tight
Close cut make correct notice.
Diamond ultra precision close cut technology is part of an ultra precision machining technology is an important component, jewelry tools many products of National Defense parts (such as multiple parts gyroscope, various plane and curved mirrorsand lenses, precision instruments and in high power laser systems
Etc.) require the use of diamond ultra precision cutting processing close to. In 2005the total output value of China’s machine tool exports about $5000000000,$800000000, jewelry equipment and $6700000000 entrance machine.
Because some important high accuracy machine tool equipment and equipment to implement closed embargo on China, and these precision instruments it is urgent thatdevelopment of national defense industry and cutting-edge technology to China’s needs, therefore, in order to make our country’s national defense and the development of science and technology not heteronomy, I have
Put the necessary human and material resources, the independent development of precision and ultra precision processing technology, for as soon as possible theprecision and ultra precision processing technical level promotion to the worldadvanced level. The direction of development of the precision machine tool are: carving wax based on inheriting the progress on the accuracy, recovery
With the high-speed cutting to improve processing efficiency, using advancednumerical control technology to improve its level of automation. But when the NC 1998China’s own ultra precision machine successfully developed western countries to China, immediately below, China now has entrance the ultra precision machine tool.Wax injection
With the increase of thickness of cutting machine, plastic surgery has beentransformed into brittle fracture removal, surface can see significant brittle breakagetrace. Every year our country although a large amount of the export of electromechanical products, but most are a low technology content, price is alsocheaper in low-grade products; gold-plated water from
Foreign entrance is high technology content, high price of high-grade products. The development direction of the ultra precision machine tool is: the further progress of the ultra precision machine tool accuracy, the development of large ultra precision machine tool, the development of multi-function and high efficiency for ultra precision machine tool. High speed precision Swiss MIKROM company
The maximum speed of five axis machining center spindle density is 42000r/min, the positioning accuracy is up to 5 μ m, fill the mouth has reached the last coordinate boring machine precision. Now our country is stepping up development of vertical above machining diameter of 1m ultra precision machine tool. Ultra fine close cut diamond tool to us
For the blade is very sharp, cutting edge radius in the range of 0.5 ~ 0.01 μ M
In the past a long time, ultrasonic cleaning machine because of the western countriesembargo restrictions, China’s entrance of foreign ultra precision machine tool seriousrestriction.
The United States, Britain, Germany and other countries in the last century seventy’s(Japan in the eighty’s) began to produce ultra precision machine tool products, andbulk supply. For example, the ultra precision cutting of brittle materials is close, the machined surface can not produce brittle fracture stitch and get the mirror, which relates to the pole
Thin cutting excision plastic brittle material brittle ductile transition problems, recentlyput forward many new insights.
. Using molecular dynamics simulations of the super finishing close cutting process,dynamic cutting process to ultra precision close cut very thin layer of material was observed and analyzed, and the excision process to improve the picturedemonstration. Magnetic polishing machine manufacturing diamond tools and grindingare necessary for the crystal
Directional, crystal orientation method in the past is mainly used X light crystalgoniometer, costly, and directional control quite tedious. Must admit, in the ultra Qiansealing machine tool technology, we with foreign advanced level there is considerablegap compared, the water quality of domestic ultra precision machine tool
The flat still further progress. Because the cutting edge radius is very small, the pastmeasurement on the edge is very difficult, now available atomic force microscopy(AFM) convenient for measurement. But China is not a "powerful manufacturing country", there is still a wide gap compared with developed countries.
The use of single crystal diamond tool in the ultra precision machine tool for ultra precision close cut, steam cleaning machine can process finish high mirror. The ultra precision cutting thickness close cut can be minimal, the minimum cutting thickness up to 1nm. From the experimental results, the ultra precision close cut glass
Visible, began cutting thickness is very small, with the removal mechanism of plastic,no brittle breakage trace processing surface.
The multifunctional and high efficient special ultra precision machine tooldevelopment, the development of Japanese electronics and home appliance industryhas played a very good role in promoting. Currently abroad have developed a variety of precision and ultra precision turning, grinding, polishing machines and other equipment, the development of new precision machining and
Precision measurement technology. Formed by the ultra precision close cut computer simulation of machined surface modeling and computer simulation of cutting forceguess guess the ultra precision cutting of single crystal aluminum close different crystal surface can be seen, because the anisotropy of the crystal, resulting in thecutting forces in different direction is not
Etc..
Precision machine tools is the basis of precision machining. Precision CNC machine tool equipment and instruments, at present our country needs an annual entrancelarge domestic cannot be produced for example, in 2003 China’s entrance of US $4160000000 worth of machine tools, machine tool and the export of only $380000000, which is mainly low precision
The common machine tool.
China has a "big manufacturing country", the scale of the manufacturing sectorranked fourth in the world, second only to America, Japan and Germany, in recent years in precision machining technology and the precision machine tool equipment manufacturing has also made no small progress.
Precision and ultra precision processing technology in recent years was a Pentiumdevelopment. This book content is rich, not only the system described the basicprinciple and technology of precision machining, application of new technology inprecision machining, also introduced the latest development at home and abroad and achievements. The successful development of Harbin Industry University
A new laser crystal orientation method, the equipment is simple, and the directionalcontrol convenient, can make the directional diamond crystal is greatly simplified.From the two machine function can be seen, there are strict boundaries betweencentral now no longer processing and high speed cutting machine.
In the large ultra precision machine tool, at present the United States, Britain, Russia and other countries have developed large ultra precision machine tool, while in Chinabecause there is no large ultra precision machine tool, therefore cannot process large diameter curved mirrors and other large ultra precision parts, foreign to these large ultra precision parts
Export restrictions, which has seriously affected the development of sophisticated national defense technology in china. Processing a combination method for themachine, processing can also be a large mirror astronomical Trinidad mirror diameter 7.5m. This book is a comprehensive system on the precision and ultra precision processing technology books, content package
Include: super fine close cut and diamond cutting tools, precision and ultra precision grinding, grinding and polishing, precision and ultra precision machine tools,measuring technology and online error compensation in precision machining, micro processing technology, supporting environment finishing, nanotechnology. Along with the aerospace, high precision
Instrument, used widely application development platform, optics and laser technologyand multi field, all kinds of complex high precision machining requirement parts, optical parts, high precision plane, curved surface and complex shape is increasingly urgent.
Cranfield machining center in Britain in 1991 successfully developed the OAGM-2500multi function of three axis NC grinder (table size 2500mm × 2500mm), processing(grinding, turning) and measuring precision of freeform surface. Switzerland DIXIcompany to produce horizontal coordinates
Boring machine is famous in the world, DHP40 high precision horizontal high speed boring machine the company produced has increased the multi axis CNC system,become a processing center; at the same time in order to realize high speed cutting,the machine tool spindle speeds of up to 24000r/min. 2004 entrance machine tool in our country is 5780000000
The dollar, export machine tool for only $520000000. Among them, LODTM large vertical optical diamond lathe is recognized the world highest accuracy of the ultra precision machine tool.
Because the diamond is very hard, and crystal anisotropy, so the single crystal diamond cutter grinding is very difficult. In recent years, the developed countries havesuccessfully developed to improve the ultra precision machine tool predecessors. This book for professional mechanism for graduate and undergraduate students as teaching materials, at the same time
An important reference book technology staff. Linhai introduced the latest development of the internal and external precision and ultra precision processing technology are as follows.
Study of Beijing machine tool in our country, the Aviation Precision Machinery Research Institute, Harbin industry university and other units can now produce somekind of ultra precision CNC machine tools such as diamond, Beijing Machine ToolResearch Institute developed machining diameter of 800mm ultra precision lathe and the Harbin Industrial University developed ultra fine
Dense lathe, the two machines are two coordinate CNC system and two coordinatelaser online measurement system, can be processed and non spherical surface of revolution; and the ultra precision milling machine KDP crystal plane developed by Harbin industry university. KDP crystal can be used for optical frequency, large power induced
An important element in optical system. In the large ultra precision machine tool, USALLL National Laboratory developed in 1986 two large ultra precision diamond lathe:one for the processing of the diameter of 2.1m horizontal DTM-3 diamond lathe,another LODTM vertical machining of 1.65m diameter
Optical diamond lathe.
Development of precision and ultra precision machining technology, directly affects a country’s cutting-edge technology and national defense industry development, so all countries in the world are very face, put great efforts in research and development, at the same time the secret technology, control technology and equipment export hub.