To die manufacturer, efficient and spare parts of economic ground treatment is pair of its productivity is lasting requirement. In rough machining, for purify many metal stuff, the traditional common sense that past workshop abides by is to be based on its metal to excise the size of rate to choose cutting tool, this will be brought about choose excision to lead as far as possible the biggest cutting tool will begin rough machining, next work measure is reduced gradually, till achieve,the appearance of the requirement is mixed bright and clean degree. Thick mill treatment uses ball head to establish milling cutter or button milling cutter normally. However, method of this kind of treatment may produce very great stress, because this need uses rigid and wonderful machining center, firm clamping apparatus and the cutting cutting tool that have good tenacity. Insert mill to already became another kind of of stuff of metal of can fast purify deeply welcome treatment method. The axial of cutting force edge that inserts mill passes into main shaft, is not along radial action Yu Dao is provided, radial cutting force may cause cutting tool bending, reduce treatment thereby precision and shorten cutting tool life. However, a problem of the existence that insert mill is, cutting tool dislocation arrives each reposition, should be entered ceaselessly and exit sunken antrum. Fundamental of big feed milling nowadays, had high speed CNC Machining as more job shops ability and mastered technology of sophisticated CAM process designing, big feed milling (HFM) becoming in the purify inside the shortest time as far as possible a kind of of much work material optional method. Big feed milling basically is to raise a metal excision is led, with rising productivity is mixed shorten handling time and the method of a kind of rough machining of development. Big feed milling uses lesser cutting deepness (do not exceed 2mm normally) , generation is thinner cut bits, these cut bits to be able to take away a large number of heat in metal cutting from cutting blade. The every tine feed of big feed milling can be as high as 5 times of groovy milling normally. Means of this kind of milling can reduce the heat in metal cutting of generation, prolong cutting tool life thereby, offer taller metallic excision to lead -- more than 1, 000cm3/ is minutely, faster than traditional milling means 1 - 2 times. The reason that big feed milling has these advantages was to use small installation part (45 ° or smaller) , make radial cutting force the smallest thereby change, axial cutting power is the greatest change. With insert mill similar, axial of cutting force edge passes into machine tool main shaft, reduced oscillatory risk thereby, make treatment more smooth. Conversely, this makes again even if is in hang greatly when extending treatment, also can use bigger cutting dosage. And, with what insert mill to differ be, when big feed milling, cutting tool is in condition of penetration of a cutting tool from beginning to end. Big feed milling can shorten another reason of handling time is to be able to reduce working procedure amount. Because use small cut treatment of deep big feed thick mill to be able to process a close only external form that is close to figure of finished product demand, often can omit accordingly semifinishing machining working procedure, simplify thereby numerical control process designing. Additional, treatment of big feed milling does not need to increase the rotate speed of the machine tool. Introduction of big feed milling is machined to realize big feed milling, the user needs to undertake assessment to whole treatment system. Above all, requirement machine tool has high speed CNC to machine very control function, tall main shaft precision and the thermal stability that prevent main shaft to expand. Next, program of requirement CAM software can handle cutting tool way flowing strategy -- if corner is round,be rectified and use helix cutting method. Flowing cutting tool method measures treatment through fastfood knife, make cutting tool undertakes can gentlily to workpiece statified cutting, and the helix feed motion of cutting tool can reduce cutting concussion, the sources of energy to use up with cutting force. In addition, the cutting bit that place of big feed milling uses is crucial also. The cutting position of these razor blade radius of thicker, circular arc intensity of structure of bigger, geometry is higher. This is meant, can use very high cutting rate, still can assure the dependability of treatment and security at the same time. To milling of major big feed, should razor blade of first selection triangle is not round razor blade, reason is its advocate the bottom that cutting force is located in cutting blade. Of course, also can choose quadrate razor blade below some circumstances, but must use minor installation part. Generally speaking, when undertaking with high-power machine tool below stable cutting condition thick mill of big feed burden is machined, or man-hour is added on horizontal milling machine, need uses quadrate bit, can make a bit more significant so. But when vertical milling machine or power are machined on the machine tool with lesser, higher rotate speed, triangular razor blade is a kind of safe choice, and it has the exceedingly good capacity that discharge bits. The application of big feed milling (1) method of milling of big feed of end panel milling suits end panel milling to machine very much (especially large quantities of quantities are machined) , it can be machined for sequel or final precision work lays good foundation. In treatment of milling of major big feed, can achieve very tall dimension precision normally, so that need only,have final precision work again can. The work semifinished product that as a result of this kind treatment involves is older, because this is used,most is big diameter milling cutter. This is meant, need uses the cutting tool that bit of triangle of knife clip, installation contains on cutter hub. Mill of big feed face also suits to process voluminous weak data very much. Means of big feed milling can be used at efficient milling antrum, suit mould treatment particularly. The choice of cutting tool and other cutting parameter basically depend on surely really by the treatment material, stiffness that be mixed by the dimension of treatment spare parts. When undertaking profile modeling milling to rough surface, use method of big feed milling very practical also. (2) helix interpolation milling is in helix interpolation milling, the treatment of method of big feed milling to big diameter aperture also is very appropriate solution -- it can omit prior operation or auger beforehand aperture. Big feed milling cutter can realize as sectional as workpiece wall contact the smallest change. Its advantage is, compare with the look of traditional milling cutter that has 90 ° to install part, the treatment process of big feed milling cutter is stabler. Big feed machines milling cutter to still can be used at inserting mill treatment. They suit to process difficult cutting data particularly (the alloy that be like titanium and other light qualitative alloy) . Big feed milling suits to be used at be being hanged greatly to extend treatment likewise. It can reduce oscillatory risk, prolong cutting tool life. But, hang in cutting tool in extending length to be more than the treatment of 3 times diameter, should avoid to use square model bit. Nevertheless, the feed ratio with undertake with big feed milling cutter treatment is relied on inserting mill normal and older cutting deepness photograph are united in wedlock. Although big feed milling is not a kind of all-purpose solution, but in implementation tall metal excision is led, make full use of the total process capability of current machine tool and lengthen respect of cutting tool life, it is a kind of very good treatment method really. CNC MillingCNC Machining