In the current difficult economic period, aviation industry is an important engine for the continuous growth of global demand for cutting tools and machine tools. Titanium is one of the main workpiece materials in this field: careful selection of cutting tools and cutting parameters can produce unexpected economic profits
(1) In order to reduce the cutting force, cutting heat and deformation of workpiece, the positive angle shape blade is used.
(2) Keep a constant feed to avoid the hardening of the workpiece. In the cutting process, the cutting tool should always be in the feed state, and the radial feed is a
E shall be 30% of the radius.
(3) High pressure and large flow cutting fluid is used to ensure the thermal stability of the machining process and prevent the workpiece surface from denaturation and tool damage due to high temperature.
(4) Keep the blade sharp, blunt tool is the cause of heat accumulation and wear, easy to lead to tool failure.
(5) As far as possible in the softest state of titanium alloy processing, because the hardened material becomes more difficult to process, heat treatment improves the strength of the material and increases the wear of the blade.
(6) Use large tool tip radius or chamfering to cut in, and put more blades into cutting as much as possible. This can reduce the cutting force and heat at each point and prevent local damage.
In milling titanium alloy, the cutting speed has the greatest influence on the tool life VC, followed by the radial cutting depth.
Titanium alloy has become an ideal manufacturing material for aircraft and engine due to its high strength, good mechanical properties and corrosion resistance. However, its application has been restricted for a long time due to its poor machinability. With the development of processing technology, in recent years, titanium alloy has been widely used in the manufacture of compressor section, engine hood, exhaust device and other parts of aircraft engine, as well as the manufacture of structural frame parts such as girder partition frame of aircraft. Titanium alloy parts produced by titanium machining services of a new aeroengine in our company account for about 11% of the total parts.