Reducing the radial and axial engagement of the tool with the workpiece controls the generation of cutting heat. For titanium alloys, the adjustment period for speed, feed rate, radial and axial engagement is very short before the built-up edge due to overheating. In order to achieve the proper tool life, the processing of titanium alloy requires only a maximum of 15% of the "joint arc length", compared to 50% to 100% of the arc length when machining ordinary steel. Reducing the contact arc length increases the cutting speed and increases the metal removal rate without sacrificing tool life. Using a tool with a plunging angle of 45° or thinning the chip increases the contact length of the cutting edge of the tool with the chip, which reduces local high temperatures and extends the life of the cutting edge, while also allowing for higher cutting speeds. Blade geometry design When cutting titanium alloys, the use of peripheral grinding inserts is critical to minimize cutting pressure and friction with the surface being machined. The blade geometry must have a positive angle, but this is not enough to ensure optimum performance. If a small initial angle of higher strength is used to enhance the first part of the cutting edge, then a larger secondary angle (to obtain a larger positive chamfer) is best for enhancing blade compression resistance and extending tool life. Geometric design. In addition, slight passivation also helps protect the cutting edge, but the passivation size must be coordinated with the cutting process and maintain tight tolerances. When machining titanium alloys, it is necessary to shear the material with a sharp cutting edge, but the sharpness of the cutting edge is likely to cause chipping and shorten the tool life. Proper passivation protects the cutting edge from premature chipping. Proper blade geometry reduces stress and pressure on the tool material, resulting in longer tool life and improved machining efficiency. The cutting angle of the body and the insert must be positive to achieve a progressive cutting effect and to avoid impact on the entire cutting edge during cutting without the desired shearing effect. If you do not do this, the workpiece structure may be deformed, making processing impossible. Cavity milling and helical interpolation milling For pocket milling and helical interpolation milling, an internal cooling tool must be used and, if possible, a constant pressure coolant should be used, which is especially important for deep pocket or deep hole machining. When machining deep pockets, high-density carbide extended cutters with modular cutting heads increase rigidity and reduce flexural deformation for optimum machining results. The function of the coolant is to remove the chips from the cutting zone and avoid secondary cutting that may cause early failure of the tool. At the same time, the coolant also helps to reduce the temperature of the cutting edge, reduce geometric distortion of the workpiece and extend tool life. The use of a milling cutter for helical interpolation of the milling hole reduces the use of other tools (such as drill bits) in the magazine. A diameter cutter can be used to machine different sizes of apertures. As titanium alloys continue to grow in the aerospace industry, cutting technologies that support the efficient processing of titanium alloys are also evolving. Due to the high demand for processing capabilities of titanium alloy parts, those workshops or manufacturers that use the most efficient machining techniques will benefit first. Internal integration creates new solutions Allegheny Technologies is a multi-disciplinary manufacturer with a combination of metal smelting and metal cutting. The combination of these two areas gives the company an edge in developing new methods for processing advanced materials such as titanium. ATIStellram, a business unit of ATI Metalworking Products of Allegheny Technologies, is responsible for testing the performance of all new materials developed by ATIAllvac to determine the optimum blade design, tool geometry, substrate and coating structure, and cutting parameters. These new materials can be processed cost-effectively before they are released for sale. In addition, as a representative of Allvac, Stellam is a leading aerospace manufacturer and a leading supplier of aerospace components to meet the common needs of both workpiece materials and cutting tools. A thorough understanding of the inherent structure of the material gives ATITtellram an advantage in the design of the unique formulation of the tool base. One of the results is X-Grade technology, which ATITtellram says has proven to be a reliable solution for processing difficult materials. Through the research and development of X-Grade technology, a new type of carbide has been produced which can effectively cut difficult materials with extremely high metal removal rates under unstable processing conditions. X-Grade blade technology (matrix and coating) The X-Grade inserts feature a bismuth/cobalt alloy matrix that resists the generation and expansion of hot cracks and achieves high metal removal rates. The substrate has a strong crystal bond matrix structure, thereby improving the toughness of the cutting edge. According to ATISTellaram, this matrix material, combined with new tool geometries and coatings, provides an excellent tool combination for machining aerospace alloys. With X-Grade inserts: 1 metal removal rate is doubled; 2 tool life is increased to 3 times; 3 machined surface finish is increased by 30%. The X-Grade inserts are available in three grades (X400, X500 and X700), each designed for a specific hard-to-cut process. They are available in standard blade versions and are mostly mounted in the insert pocket of a standard tool body. But ATISTellram says the best solution is to use specially designed tools to optimize the performance of the X-Grade blade. The sipe design of these tools allows for maximum chip evacuation, enhanced groove geometry and optimum cooling. The two tools in the series include: 17710VR anti-rotation button milling cutter: patented locking indexing system with round inserts to prevent displacement of the insert at high feed rates; 27792VX high feed milling cutter: with conventional cutters The metal removal rate can be doubled. In addition to high-feed surface milling, the 7792VX series of tools can also be used for milling pockets, milling slots and plunge milling. Since the cutting forces are transmitted directly into the spindle in the axial direction, spindle friction can be reduced and cutting stability can be improved. Previous page next page Eco-Friendly Bamboo Fibre Coffee Cup,Eco-Friendly Coffee Cup,Eco-Friendly Bread Box,Eco-Friendly Lunch Box PERFECTS ENTERPRISE LIMITED , https://www.chibelco.com
Reduce heat generation