Dosage of car mill cutting affects an analysis to cutting tool tatty

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Dosage of car mill cutting analyses a summary to influence of cutting tool tatty: On the machine tool of orthogonal car mill that transforms in the course, use data of workpiece of high strenth steel, undertook car mill cutting tool wears away intensity experiment, analysed dosage of car mill cutting to wear away to cutting tool the influence of intensity. Consider to make clear, in affecting dosage of cutting of tatty of car mill cutting tool, cutting speed wears away to what car milling cutter provides intensity impact is the biggest; Wear away with what car milling cutter provides the experiment is a foundation, it is variable with cutting speed, built Che Xi the cutting tool of high strenth steel wears away intensity model. 0, technology of introductive car mill [1] is to be contented tall productivity and high quality this two big targets and a kind of when development rises advanced production technology. Accordingly, che Xi engineering technology makes current world, especially the research heat of industrial developed country. Use Che Xi to replace turning, milling, the cutting tool data that cannot use material of existing cutting tool or pure turning effectively will process all sorts of workpiece data, and implementation reachs Bao Bi to of all kinds swing tower kind the treatment of the spare parts. It has treatment effect to lead precision of tall, treatment life of tall, cutting tool long, cutting is smooth, nonexistent the advantage such as the problem that break bits, can complete the treatment that comes true hard with car or mill alone normally. Of metallic cutting cutting tool wear away, the cost of the accident that affects cutting tool life directly, production, on any account that produces efficiency and the stand or fall that machine quality; All sorts of physics phenomena in cutting process, wait like vibration of cutting force, heat in metal cutting, system, also have affinity to it mostly [2] , accordingly, the cutting tool that studies Che Xi wears away to apply to abounding car mill theory and practice, all have very important sense. 1, car mill technology and research of technology of mill of characteristic abroad car basically are centered in the industrial developed country such as Germany, United States and Japan, research domain involves Che Xi principle, Che Xi is kinematic reach quality of surface of kinetic, Che Xi and cutting tool to wear away etc. Che Xi is not pure Che Hexi two kinds of process instrumentation incorporate on a machine tool, the treatment that uses Che Xi to synthesize motion to complete of all kinds appearance however [3] . The relative position that Che Xi presses milling cutter and workpiece can be divided for axial mill of car of Che Xi, orthogonality is mixed mill of general position car. Orthogonal car mill because the axis of rotation of milling cutter and workpiece is mutual and perpendicular, the as a result of milling cutter fore-and-aft journey when round outside treatment face is unlimited, and can use bigger fore-and-aft feed, accordingly it is to process large swing tower and long rod kind a kind of of the spare parts efficient method. Like the graph 1 is shown [3] , the cutting dosage of orthogonal car mill includes cutting speed, milling cutter feed of the feed speed along axial, axial, tangential feed (milling cutter every tine feed) wait with cutting deepness 2, Che Xi cutting tool wears away experiment 2.

1 experiment purpose and cutting tool of methodological car mill wear away experimental purpose is to use method of only factor experiment [4] , the change that will study dosage of car mill cutting is right of cutting tool wear away mechanism and wear away the influence rule of intensity, try to be analysed theoretically to experimental result. Car mill cutting tool wears away exterior form appearance and wear extent are mixed by electron microscope of Japanese SSX-550 scanning observation of microscope of IM small-sized tool is analysed and measure. 2.

Test of tatty of cutting tool of mill of car of 2 tests equipment has on the machine tool of orthogonal car mill that transforms in the course, if pursue,2 are shown. 2.

High strength of data of workpiece of 3 experiments condition hard alloy of SC30 of coating of TiN of steel experiment cutting tool (be equivalent to Che Xi of orthogonality of means of milling of knife of Duan Xi of international standard P20~P40) , emulsion of means of the refrigeration that go against mill 3, experiment of experimental result analysis studies the result makes clear, wear process of car mill cutting tool is very complex. Below different cutting condition, car mill cutting tool basically wears away pattern is different also, all sorts of wearing away the proportion that the wear extent of configuration holds below different cutting condition is different also; All sorts of wearing away configuration already separate action, affect each other again. In affecting dosage of cutting of tatty of car mill cutting tool, the wear process that cutting speed provides to car milling cutter, wear away configuration and wear away intensity the impact that wait is the biggest. When cutting speed is inferior, when face of continuous the knife before cutting bits to shed classics cutting tool, on cutting tool and the actual contact area that cut bits attrition area, cutting temperature can achieve 900 above, cutting tool and workpiece material bring into contact with produce felt when the distance between atom, produce cold welding phenomenon. When face of the knife before cutting tool of the edge that cut bits is poured out of, force interior of softer the ground floor that cut bits to produce very big cutting to be out of shape. The felt of two attrition surface nods the opposite motion because of cutting tool and workpiece, grain or grain group suffer cut or suffer pull and be taken away to cause felt to wear away by the other side, if pursue,3 are shown. When cutting, the pressure that contacts an area is very high, make contact an area actually to increase, cut bits and workpiece material along cutting tool before, hind knife scale moves ceaselessly, destroyed the oxidation layer of cutting tool surface and other adsorption film, intense felt just was formed between the new appearance that from workpiece material interior cutting gives especially. When Che Xi when cutting rate is higher, its wear away mechanism basically is behaved for exhaustion - flake wear away and diffuse wear away. Because Che Xi is a kind of interrupted cutting, milling cutter bears to the periodic stroke that cuts bits, cutting heats and cut refrigeration for nothing, make cutting tool surface changes quickly to heat up and become cold, stress of the thermal stress that cutting tool surface is relapsed, attrition and osculatory stress action, thereby the interior of the cutting tool data that in surface layer of distance cutting tool certain deepness issues, arose to contact fatigue crackle source. After continueing to contact action through what relapse for many times after that, source of osculatory exhaustion crackle has surface layer way to the knife rapid dilate, thereby, meshy crackle was formed on cutting tool surface layer, cutting tool surface layer because of crackle expand and cause chap, cutting bits material of cutting tool surface layer is brought about below stroke ceaselessly one layer upon layer ground is flaked. In addition, in the primitive grain interior of cutting tool material, still be crystal boundary place, put in the internal stress with inhomogenous move, because this is hard to exist,have show micro-crack. A lot of adjacent micro-crack, ceaseless below the action of cutting force and force of attrition force substandard outspread, amalgamative, form macroscopical crackle, the further action of outer force issues a generation to flake. Face of the knife before using scanning electron microscope and electronic bougie to show what small analyzer checks cutting tool, hind knife face and deputy hind the chemical composition of knife area small area, specification as cutting speed rise ceaselessly, the car cuts the contact of bits, workpiece and cutting tool in mill process, the cutting temperature of generation is enough tall when, mutual have kiss and the elemental atom of action spends small part from chroma altitude Xiang Nong migratory, bilateral chemical element diffuses each other below solid state. If pursue 4, 5 are shown. Inside studies cutting speed limits, when cutting speed is inferior, wear away with felt give priority to, also accompany on this foundation have exhaustion - flake wear away with abrasive etc; And fall in higher cutting rate with exhaustion - flake wear away and diffuse wear away give priority to, accompany felt wears away with abrasive etc. Wear away with what car milling cutter provides the experiment is a foundation, it is variable with cutting speed, built what the car milling cutter of steel has high strength of orthogonal car mill to wear away intensity model, if pursue,6 are shown. The addition of cutting speed, make cutting temperature elevatory, cutting tool contacts the material molten in the area with what cut bits, work, the amount of small felt area increases, make felt wears away with exhaustion - flake wear away intensity increases. But increase of speed further as cutting, be gotten than bate of cutting tool material by treatment material fiercer, criterion felt wears away and fatigue - flake tatty intensity will be reduced. At this moment cutting temperature continues heighten, cutting tool and cut element of bits, workpiece between diffuse each other speed is increased, accordingly, diffuse wear away intensity increases. Below different cutting speed, all sorts of wearing away mechanism interaction, mutual influence, aggravate of car mill cutting tool wear away intensity. 4, conclusion (1) get off in inferior cutting speed mill high strenth the cutting tool of steel wears away mechanism basically wears away with felt give priority to, also accompany on this foundation have exhaustion - flake wear away with abrasive etc; And fall in higher cutting rate with exhaustion - flake wear away and diffuse wear away give priority to, accompany felt wears away with abrasive etc, all sorts of wearing away mechanism is affected each other in different cutting condition, interaction. (2) below different cutting condition, of car mill cutting tool basically wear away mechanism is different also, the wear process that cutting speed provides to car milling cutter, wear away configuration and wear away the impact such as intensity is the biggest. Inside studies cutting speed limits, abrasive wears away, felt wears away and fatigue - flake wear away almost perforative from beginning to end, and diffuse after wearing away to raise fixed cost in cutting speed, just have dominant place. CNC Milling