With the MCS of 3 water chestnut that machines at composite material broach

Composite material already applied in great quantities in aviation industry. It is with the most advanced American Boeing aircraft exemple, original 747 model the airlines admits at present present 787 model, data of its airframe share is formed in composite material is as high as 52% . Composite material is two plant or two kinds of above are different and characteristic the combination of material, quality is light, have some kind of specific property. The base material of composite material is commonly used colophony waits, enhancing material basically is fiber. The cutting principle of composite material and the metal such as carbon fiber and process are different. Metallic cutting is cutting blade cuts a metal, made generation cuts slippage to rupture form of all kinds the course that cuts bits, and carbon fiber composite material is to pass sharp the crucial point to break off compulsively fine peace keeping cuts off epoxy resin layer, if fiber chafes conversely like abrasive wear away cutting tool. Their treatment is multi-purpose get cut and milling. According to statistic, foreign getting, milling is occupied each about in composite material treatment 38% , other cutting treatment is like turning, grinding, thread machining to wait to also have application, still used water efflux treatment, laser beam machining to wait. While cutting machines composite material spare parts, should not make it causes delamination, fiber diffuse, generate combustion attachment, and do not have burr. Because this must improve original cutting tool, craft and process are controlled. Basically use the data of new wear-resisting heat-resisting in development to the improvement of cutting tool, the side chooses in geometrical structure and angle, stress is begged make point sharp, reduce cutting force and heat in metal cutting, oneself work life should grow as far as possible. Main problem is to get resistance of each material when the layer to have when bore what change and get the power when appearing is abrupt disappear, cause the change of feed speed, bring about delamination burr, material to denude. Composite material is different level diameter is different, plus extreme difference of thermal conductivity of carbon fiber composite material, cause burn very easily. For this, 3 water chestnut are new developed MCS broach. It is in 3 water chestnut original broach is improved model on foundation of basic set MWS, combinative composite material machines characteristic development to come out. MCS broach is CFRP plank and CFRP and aluminous compound plank treatment to design undee blade only, make advocate edge all keeps reasonable everywhere sharper before horn, can reduce cutting force heat in metal cutting. At the same time undee blade makes easily cut bits disjunction, eduction. This pair reduces cutting force and heat in metal cutting further, eliminate treatment burr, raise broach life to have profit. MCS broach repairs abrasion horizontal blade in its coping cone again, horizontal blade is the ply that broach head gets core, it not cutting, it is extruding rolls a fiber material only, and it is to get the main source that cuts axial force and heat in metal cutting, long grind form ternary hind after knife face, the attrition that can reduce axial force and top is calorific, increased centering capacity, grind again convenient also. To reduce the triangle that MCS of heat in metal cutting broach designs cooling aperture is weighed call TRI-cooling technology. According to the experiment, below 4700r/min condition, the round hole of discharge tower above of triangular aperture cooling fluid 2 times above, velocity of flow also is increased a lot of. As a result of the characteristic of fiber composite material, cooling medium more adoption compress gas. Used TRI-cooling technology, because cooling effect is good, efficiency of broach treatment precision and life rise a lot of. On design of structure of other explicit bit, increased look bits to discharge bits space, also make cut bits and cutting to heat up can smooth eduction. The GFRP below some circumstances (fibre glass composite material) use relatively a long time, right now cutting treatment uses all sorts of cutting tool base material but Alexandrine, the DLC that the surface can use special development of 3 water chestnut (kind diamond) coating, treatment efficiency is tall, and special economy, be worth to recommend. CNC Milling