The success of aviation parts processing cutting technology

Published on 2018-08-13

Aviation difficult-to-machine materials and parts cutting technology is a complicated system engineering.On the choice of the cutting tool, should be reasonable selection and processed parts in mechanical properties, chemical properties and physical properties that match the new efficient aviation difficult-to-machine materials and parts cutting technology is a complicated system engineering.On the choice of the cutting tool, should be reasonable selection and processed parts in mechanical properties, chemical properties and physical properties that match the new type of high efficient cutting tool.Some good performance of high speed steel tools, cemented carbide coating tools, ceramic and super-hard material cutting tools are typical parts of aviation refractory materials of choice for high efficient cutting.Below is the aviation parts processing successful cases: (1) a nickel-based superalloy GH4169 was investigated circular pieces of processing.The material is equivalent to the material mark Inconel718, hardness 35 ~ 47 HRC.The linear velocity of 400 m\/min, the feed speed is 0.25 mm\/r, cut deeply 1.6 mm.Feed, USES the new technology of oblique cutting, namely gradually reduce the cutting depth in the process of cutting, the effect is very good, not only the blade wear mild, shape of blade in good condition, and realizes the high efficiency cutting, guaranteed the processing quality.(2) a machine box parts, materials of GH2132.After solid solution and aging, hardness is taller.The material high cutting temperature, work hardening tendency, when its cutting hardened layer depth of 0.05 mm, bring bad influence machining.Material of high strength, plasticity and toughness, surface residual stress.Should be rational choice in machining, cutting depth and feed the cutting blade cutting under the hardening layer, otherwise it will speed up the tool wear.Diameter is larger, the parts with thin wall thickness, the parts is not strong rigidity, which resulted in increased cutting force and vibration will happen in the process, causes the deformation of parts, parts prone to oscillation corrugated surface.Many times when cutting test according to the workpiece and cutting deep layer processing.Testing equipment: five coordinate nc milling machine, machine tool spindle turning velocity 1 800 r\/min, feed speed up to 500 ~ 700 mm\/min.Test tool: choose solid carbide end mill, a diameter of 12 mm, isometric 4 teeth, master Angle 90 & ordm;, petiole 12 mm in diameter, spiral Angle 45 & ordm;And blade length 26 mm, blade length 75 mm, TiALN coatings, using high pressure cooling.45 & ordm;Chip spiral Angle can effectively increase the capacity of space, the reasonable milling cutter cutting edge and the spiral Angle is optimized, reduces the cutting force, prolong the life of the cutting tool, workpiece surface quality conforms to the technical requirements.(the original title: cutting technology research of typical parts of aviation refractory materials) (source: metal processing 2011, 17)