Integral impeller is the core component of engine of turbine type engine, turbine pressure boost. It all has wide application in the industry such as motivation of the sources of energy, aerospace, petro-chemical, metallurgy, it is to have representative, and modelling is more normative, typical passageway kind complex part. Its model the performance of air motive force that precision of the process instrumentation of the face, treatment and treatment surface quality affect engine directly and mechanical efficiency, have conclusive effect to engine function. Integral impeller because the complexity of its curved surface and treatment precision are tall, make its make typical difficult treatment part. Be opposite as the market the demand of turbine engine is bigger and bigger, the efficient treatment that realizes integral impeller also is sent more necessary. The material with integral at present common impeller has alloy of aluminium alloy, titanium, stainless steel to wait. The curved surface model that the complexity that impeller machines basically consists blade is very complex, basis of its curved surface shapes the principle can be divided for curved surface of straight grain of straight grain curved surface and blame, and straight grain curved surface can be divided again can extend straight grain range to can exhibit straight grain face and blame. Treatment of milling of 5 axes numerical control is flexible good, treatment efficiency is tall, applicable and extensive, it is one of methods with integral impeller commonly used treatment. Of the curved surface appearance according to impeller different, use two kinds of methods normally when be machined on numerical control machine tool, it is the law that nod mill and side mill law respectively. Because the form of integral impeller is more complex, the twist of blade is big, treatment produces interference extremely easily, because this difficulty that its machine is in the thick, finish machining of flow path, lamina. In the CNC Machining process of integral impeller, be cut too to reduce what cause as a result of cutting tool as far as possible and interfere, and machining narrower the cutting tool when flow path still can have better tigidity, often use milling cutter of taper ball head. To make impeller satisfies the requirement of pneumatic sex, blade often is used twist ministry of horn, root to become round greatly horny structure, this raised taller requirement to the treatment of impeller. Integral impeller processing technique asks to include dimension, appearance, position and exterior surface roughness to wait for the requirement of geometrical respect, also include the requirement of mechanical, physics and chemical function. Impeller blades must have good exterior quality, precision is centered in the blade surface, surface of hub and foliaceous root surface commonly, the value should be less than exterior surface roughness Ra0. 8um. Nextpage to satisfy afore-mentioned requirements, integral impeller encounters the following kinds of problems in the regular meeting in machining a process: Flow path of ① whole impeller is narrower, blade is relatively longer, stiffness is inferior, belong to Bao Bi kind spare parts, machine a process to be out of shape extremely easily. In machining a process, as a result of the action of oneself structure and exterior cutting force, the end on the entrance of flow path and lamina can produce shake grain. Produce shake grain to avoid sometimes, what often should change cutting tool is sharp degree, this will make the entrance of flow path, exit and blade edge can produce burr again. To assure the exterior quality of integral impeller, need cutting tool falls in the case that has enough tigidity, can have the enough space that discharge bits and appropriate sharp rate again. ② flow path is the narrowest place lamina deepness exceeds cutting tool diameter far, space of photograph adjacent lamina is dinky, diameter of man-hour cutting tool is added in clear part lesser, cutting tool breaks off easily, the control of cutting deepness also is the crucial technology of treatment. Curved surface of ③ whole impeller is free curved surface, flow path is narrow, blade twist is more serious, and have apparent hind admire a trend, add man-hour to generate interference extremely easily, treatment difficulty is greater. Because some impeller have back blades, to avert interference, want section to machine curved surface, accordingly, make sure the consistency that machines the surface also has difficulty. ④ considers integral impeller rotates in the high speed in real work, turn up 30000-50000 turns, should prevent to shake and reduce noise, the demand to dynamic balancing is so high, this raised the requirement to machine tool and cutting tool, want managing treatment metre already, want to assure the smooth stability of cutting and symmetry again. What consider machine tool, cutting tool, clamping apparatus and integral impeller integratedly is rigid, design the workmanship with reasonable cutting tool construction, right choice, with respect to the production requirement that can satisfy integral impeller. CNC Milling