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Processing center in the composite material machining should pay attention to what issues?
A, processing center the types of composite materials
Composite material according to its composition can be divided into metal and metal composite materials, non-metal and metal composite materials, non-metallic and composite material, not of metal.According to its structure is divided into:
1, the fiber composite materials.Put all kinds of fiber reinforced body in matrix material within the composite.Such as fiber reinforced plastics, fiber reinforced metal, etc. 
2, laminated composite materials.By the properties of different surface materials and core material.Usually face bar high strength, thin;Core material is qualitative light, intensity is low, but has certain rigidity and thickness.Divided into solid laminated and honeycomb sandwich. 
3, fine particle composites.Will hard fine particle uniform distribution in the matrix, such as dispersion strengthened alloy, metal, ceramic, etc. 
4, hybrid composite materials.Enhanced by two or more than two phase materials mixed in a matrix phase material.Phase composites reinforced with ordinary single ratio, the impact strength, fatigue strength and fracture toughness increased significantly, and has a special thermal expansion performance.Into the mix inside layer, layer between the mixed, mixed sandwich layer within/between hybrid and super hybrid composite materials. 
Second, the processing center processing composite material should pay attention to some problems
1, carbon fiber composite material low interlaminar strength, easy on the cutting force under the action of layered, so drilling or trimming should reduce the axial force.Require high drilling speed, small feed, processing center speed is in commonly 3000 ~ 6000 r/min, the feed is 0.01 ~ 0.04 mm/r, bit choose three pointed two edges or better form two sharp blade, sharp blade can cut carbon fiber layer first, two edges of the hole wall have played an important role to repair, diamond-impregnated bit sharp and abrasion resistance are good.With titanium alloy laminated composite drilling is a difficult problem, generally adopts the solid carbide drill bits, according to the drilling cutting parameters for drilling of titanium alloy, the titanium alloy side first drill, drill through, when drilling to add lubricant, alleviate composite material burns.PCD has been developed specially for the Boeing company combination drilling bit is used for sandwich. 
2, the three kinds of new solid carbide composite material machining cutter cutting effect is better, they all have some common features: high rigidity, spiral Angle is small, it is even 0 °, specially designed herringbone blade, can effectively reduce the processing center axial cutting force and reduce stratification, its processing efficiency and the effect is very good. 
3, chip for powder composite materials, harm to human body health, should use high power vacuum aspiration, the water also can effectively reduce the dust pollution. 
4, carbon fiber composite material component generally larger size, complicated shape structure, hardness and strength is very high, belongs to the hard processing material.Cutting process of cutting force is bigger, the cutting heat is not easy to come out, serious when burning resin or to soften resin and serious tool wear, tool is the key to the carbon fiber processing, therefore, its cutting mechanism is more close to the grinding instead of milling, so the machining center cutting speed is usually more than 500 m/min, adopting high speed small feeding strategy.Solid carbide is generally selected cutting processing cutting tool knurled milling cutter grinding wheel, electroplating diamond grains, diamond-impregnated corundum grains saw blade milling cutter, copper funds.