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Titanium Nitride Drill

Filed under Power Tools by Power Tool Team on September 7, 2011 at 7:26 pm no comments

Titanium Nitride Drill
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Aviation Industry Needs Into the Future Industrial Development Tool

Into the 21st century, the fierce market competition driving machine technology as the guide to the advanced manufacturing technology at an unprecedented pace, aviation parts manufacturers have entered the digital manufacturing technology to the characteristics of development. Advanced aviation parts aviation product requirements with superior performance, lower costs and higher environmental protection, and processing technology requires faster processing speed, greater reliability, repeatability and reproducibility. The traditional tools can not meet the above requirements, thus cutting tool industry has entered a "high precision, high efficiency, high reliability and specialization," a new pattern of the modern tools of production.

High speed, high cutting

With the scientific and technological progress, we are in the period of rapid development of advanced manufacturing technology, promote the use of CNC machine tools, which greatly reduces the secondary machining time, greatly increasing productivity. Aviation for the manufacture of total hours, the auxiliary time, cutting the proportion of time occupied by the corresponding increase, in order to further improve the productivity of machine tools, have greatly improved cutting speed, which is in recent decades, the rapid development of high speed cutting technology the main reason. High speed processing is mainly used for aviation industry first light alloy processing, aviation manufacturing industry has become to improve processing efficiency and quality, the main way to reduce the processing cost.

Processing in the aviation parts and components, high speed cutting is being a large number of applications, mainly in the following reasons:

(1) In order to maximize weight loss and meet other requirements, a number of components, siding with "the whole manufacturing method", that is rough on the removal of large margin, the formation of thin, fine rib structure of the parts, need to In addition to a large number of metallic materials, resulting in cutting time, the proportion of occupied large parts of the total production time, so one way to improve productivity is to use high speed machining.

(2) aircraft spare parts of the structure of complex, high precision, thin walled parts, small tendon stiffness is poor, to minimize the processing of the radial cutting force and thermal deformation, and only high speed machining in order to meet these requirements.

(3) hard to machine materials such as nickel based superalloy, titanium alloy, high strength structural steel products extensively used by modern aviation, the material strength, hardness, impact resistance, easy processing of hardening, cutting temperatures are high, a serious tool wear , are difficult to process materials.

Generally use low cutting speeds for processing, if the high speed cutting, not only can greatly increase productivity and can effectively reduce tool wear, improve part surface quality.Unlike the conventional high speed machining with cutting mechanism and application of processing technology advantages, it is changing the concept of CNC machining technology. According to aviation products, materials and structural characteristics, to achieve high speed processing to advanced high speed cutting tools as a guarantee. High speed cutting tools must have good wear resistance and toughness of high strength, advanced tool materials, excellent tool coating technology, reasonable geometry parameters, a high degree of balancing tool system, safe and reliable clamping means, and high concentricity blade accuracy and so on.

Cutting tool materials and application development

Currently, the field of aircraft manufacturing, high speed steel cutting tools or about all kinds of 60% of the total tool, carbide cutting tools account for about 35% of the total amount of tools, superhard cutting tool (cubic boron nitride, diamond) accounted for All tools less than 5% of the total, in the future as new materials are emerging aviation, hard cutting, dry cutting applications increase, carbide tools, cutting tools, ceramic cutting tools, polycrystalline cubic boron nitride cutting tools and diamond tools ratio will be increased substantially.

1. The development of hard alloy materials

To meet the rapid development of high speed cutting technology to a variety of cemented carbide cutting tool material properties mainly been an overall improvement, fine particles, ultrafine particles and the development of hard alloy coating on carbide tools in the application of significant improved strength and toughness of cemented carbide material, used to make the overall alloy cutting tools are gradually replacing the traditional high speed steel cutting tools, cutting speed and processing efficiency to improve by several times, to promote the use of high speed cutting and lay an important foundation. Solid Carbide cutting tools are still a number of complex shape has been applied to meet the needs of the diversity of product processing. Currently, Xiamen Golden Egret Special Alloy Co., Ltd., Zhuzhou Diamond Cutting Tools Co., Ltd. Hard, Siping Bolt Technology Equipment Co., Ltd and Shaanxi Air Carbide Tool Company can provide carbide cutting tools for the aerospace industry, the performance of their products close to the world advanced level.21 carbide tool material should focus on the development in two areas: First, grain refinement and reach nanometer crystallite level. The smaller the carbide grain size, the higher the hardness of cemented carbide, the better the wear resistance, toughness, and the higher stiffness, thereby expanding its scope of application; second is the application of new technologies and new process development of new hard carbide alloy to improve internal performance and quality.

2. Coating technology

Tool coating technology in the development of modern machining and cutting tools plays an important role, since its inception has developed rapidly, especially in recent years made significant progress, chemical coating (CVD) remains the main indexable inserts coated layer technology, have developed a medium temperature CVD, thick film of aluminum oxide, transitional and other new technology, in the matrix material to improve the foundation, the CVD coating wear resistance and toughness have been improved; and physical coating ( PVD) technology has made significant breakthroughs in the structure of coating equipment, process, automatic control, have made significant progress, developed for high speed cutting, dry machining, hard machining and better heat resistance coating By coating the structure of innovation, development of nano , multi layer structure of a large number of new coating greatly increase the coating hardness and toughness.

3. Development of superhard cutting tool materials

Superhard material is diamond and cubic boron nitride (CBN), its hardness is several times higher than other tool materials, diamond is the hardest substance in nature, CBN is second only to diamond hardness. In recent years, the rapid development of superhard cutting tool materials.Diamond cutting tool material is divided into five categories: natural diamond (ND), artificial PDC (PCD CC), diamond film coated tools (CD), diamond thick film cutting tools (FCD) and artificial polycrystalline diamond (PCD) . ND's crystalline anisotropy, making the use of knife grinding must choose the appropriate direction; synthetic diamond isotropic, its hardness is lower than ND, but the strength and toughness in ND.Diamond tools to effectively process non ferrous metal materials and is very efficient. Such as copper, tungsten and other non ferrous metals and alloys, ceramics, cemented carbide, various fibers and particles to strengthen composites, plastics, rubber, graphite, glass and wood, But avoid cut diamond steel and other iron group elements.Cubic boron nitride (CBN) cutting tool material has high hardness and red hardness, high speed finishing and semi finishing hardened steel, chilled cast iron, high temperature alloys ideal tool material, due to the high hardness of CBN cutting tools available at the time part good surface roughness, thus cutting hardened steel by CBN tool can achieve the "cut instead of grinding."

4. High speed steel material of

Development of tool materials in the future still referred to the development of high speed steel material, although high speed steel materials in the world of sales is reduced year by year, but the high cobalt high speed steel and the use of powder metallurgy high speed steel continues to increase, which 2 high speed steel than ordinary high speed steel has better resistance to wear, red hardness and the use of reliability. As people seek to improve cutting efficiency and the concept of change, these high performance high speed steel cutting tools are widely adopted in the aviation field. Difficult to machine materials such as air, automatic riveting machines used in drilling drilling, expansion joints, countersink tool and process integration of high precision composite aircraft parts for various types of surface complex compound tools.

With advances in technology, advanced manufacturing systems, high speed cutting, ultra precision machining, green manufacturing development and put into practice, put forward new requirements on the tool, cutting tool material are also bound to the next major development. Tool material and workpiece material development and mutual promotion of both sides alternately, a continuous development of cutting tools law of history. In the future, cutting tool material properties of the workpiece will face increased processing volume to increase and improve manufacturing precision, more serious challenges. Progress in materials science and promoting the development of tool materials, cutting tool material development should take into account raw material resource constraints. The emergence of new varieties, old and new varieties of their own share of changes and how they compete and complement each other's pattern, will be the future development of the new features of cutting tool materials.

Tool new technology, new structure, and trends in the development of new varieties

With the rapid development of manufacturing industry, aviation industry and die industry and other key sectors of the cutting continuously higher demands, and promote the use of new technologies, new tools are emerging structure, enrich cutter variety. Tool manufacturers at home and abroad, such as the Xiamen Golden Egret Special Alloy Co., Ltd., manufacturer of the tool to meet the requirements of aviation, and aviation manufacturers work closely with the development of new tools. As the aircraft parts with complex, high precision, thin walled parts and aircraft spare parts using titanium, nickel based alloy, carbon fiber and other difficult materials and more features, thus guiding the development of air tools to the following direction.

(1) high accuracy, high efficiency, high surface quality. The traditional knife shaped cutting parameters can not meet modern requirements on the tool, Xiamen Golden Egret R & D personnel according to processing requirements and processing characteristics of the development of a highly efficient processing of aluminum products, using ultra fine grain cemented carbide rods; large circular slot and gradient core diameter design makes cutting tools greatly enhance the ability of rigid and Chip; edge polishing technology and content grove special treatment process to be greatly improved processing; application process tooling and processes will make the whole batch control tool diameter tolerance 10?m below the radial axis control 5?m below the level of control in the G2.5 balancing tool less. Access to national patent protection, large aircraft manufacturers in the domestic and foreign well known comparison of import substitution tool.

(2) ultra high precision, long life. High volume products in the processing, complex parts, precision workpiece, the tool can not meet the general requirements, Xiamen Golden Egret R & D personnel to develop diamond coated polishing tools, diamond coated tools in machining non ferrous materials on the performance of long life, such as processing carbon fiber, graphite, aluminum, composite materials, life expectancy is 50 times higher than other coated tools, but the drawback is that the surface roughness of less than ideal. Xiamen Golden Egret R & D personnel with unique coating process on the polished diamond so that the surface effect like a mirror, both long life and ultra high precision features, access to national patent protection.

(3) high strength, high rigidity and other difficult materials. With the rapid development of materials science, more and more difficult to cut materials applied to various fields in order to TC18, for example, with the common titanium alloy compared to the processing efficiency of TC4 1 3 of its speed, feed, eat knife cut the amount varying degrees, Xiamen Golden Egret R & D personnel and the Xi'an Aircraft Industry (Group) Co., Ltd. jointly developed the double helix ranging from minutes before the wave edge tools and knives, application and development of titanium free coating, not just for Grooving also suitable for side processing, and processing rate is higher than normal titanium alloy.

The development of modern cutting technology tools urgent need of advanced design technology, and tool design features of the space difficult to calculate the angle, shape, complexity, size, variety and cutting mechanism is very complex, but with computer technology and CAD CAM technology, the rapid development of advanced technology and specialized application software and simulation tools to conduct research and development tool will be the future direction of design and development tool.

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