Do CNC deep hole processing friends should know that CNC processing, deep hole processing is the most difficult. The so-called deep hole machining is the processing that the ratio of the length of the hole to the diameter of the hole is greater than 10 times. The deep hole processing is applied in some industrial fields of the country, such as the national military rocket body and the barrel of various guns. In these application fields, some require very high quality and precision of machining, and some require high cutting ability of processing materials The so-called CNC is the abbreviation of computer numerical control machine tool, which is the technology required for programmed control, automation and high-tech.
CNC technology is applied to deep hole processing. Because the processing technology and method of computer gong machining are very complex, few people use CNC machining center to process deep hole. If this technology is used, first of all, we should transform the CNC machining center to vibration deep hole drilling machine, and combine the advanced deep hole machining vibration cutting technology with AC frequency conversion speed regulation technology Together, it forms a kind of precise professional processing technology. This kind of precise CNC deep hole processing technology effectively applies the vibration cutting technology to the drilling process. On the basis of the traditional deep processing technology, the amplitude and frequency of the regular vibration of the tool used are given. In the process of cutting tool running, the cutting work is completed by vibration at the same time, and the cutting thickness changes periodically, so as to achieve the purpose of NC cutting according to the predetermined shape and size. Thus, the problem of chip removal interruption in CNC deep hole machining is effectively solved, and the quality and efficiency of deep hole machining are improved.
After years of efforts, the development of domestic ultra precision machining equipment has begun to take shape. The indicators of many equipment for machining mechanical parts, including aspheric surface composite machining system, have reached or approached the world advanced level In terms of reliability and operability, there is still a certain gap. How to better play the role of equipment requires further human and material investment. For example, the nano sys-300 aspheric surface compound processing equipment of our laboratory has been in the production line service since it was delivered to the user in May 2003. It has processed many batches of task parts, which can fully meet the requirements of users in terms of processing accuracy, but there is still much room for improvement in other aspects, such as operability and reliability. Therefore, it is necessary to strengthen the research on the reliability and practicability of ultra precision machining technology.
With the development of science and technology, more and more advanced new functional materials and structural materials will be applied, including new high strength, high hardness materials, intelligent materials, new semiconductor materials, and so on. For example, the processing technology of SiC reinforced composite materials used in satellite cameras, the ultra precision turning technology of infrared materials such as germanium, monocrystalline silicon and calcium fluoride glass, and the flying cutting process of KDP crystal (laser fusion), etc.
MEMS processing technology mainly includes silicon planar process and bulk silicon process developed from semiconductor processing technology. Since the mid-1980s, LIGA technology, which uses X-ray lithography, electroforming and injection molding, was born, forming another MEMS processing system. The processing technology of MEMS can include silicon micromachining for surface and bulk machining, Liga machining and quasi Liga machining using UV lithography, micro EDM, ultrasonic machining, plasma machining, laser machining, ion beam machining, electron beam machining, stereolithography, etc.
However, the components of these micromachines are various and complicated. In order to make the performance of micromachines really pass the standard and reach the practical level, it is necessary to improve the manufacturing technology and equipment level of micro mechanical parts as soon as possible. At present, lithography is the most mature technology in the manufacturing process of micro mechanical parts. Most of the classic micro mechanical parts are made by lithography or electroforming technology. However, the micromechanical parts processed by these mature technologies can only be two-dimensional (or quasi three-dimensional), and the actual three-dimensional shape parts can not be completed by lithography technology. There are many three-dimensional micro parts in CNC machining center, such as micro mold, micro thread with diameter of 70 μ m, micro rack, pin with diameter of 50 μ m, stepped shaft with diameter of 200 μ m, 100 μ m and 50 μ m, and rotary polishing with outer diameter of 300 μ M The processing of these typical three-dimensional micro parts can not be realized not only by lithography, three beam processing, but also by traditional mechanical manufacturing system. Therefore, it is necessary to develop and develop a micro manufacturing system according to the characteristics of three-dimensional micro machines. In this new concept manufacturing system, the processing, detection and assembly of micro machine parts can be realized. The manufacturing system of micro machine, which is composed of micro equipment, is called micro manufacturing system. The technical problems include the processing, detection and assembly of micro machine parts. The research work in this field is mainly concentrated in Japan and the United States. In this regard, Japan first put forward the concept of micro desktop factory.
However, it is not necessary to use micromachining machine tools to process micro mechanical parts, such as the characteristics of machine tools for processing instrument parts
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