Titanium alloy inserts the ambiguous and comprehensive assessment of function of cutting of mill process cutting tool

Because titanium alloy has taller than intensity, hot strong sex good, anti-corrosive, resourceful wait for a series of advantages, in aviation, spaceflight, nautical with getting in etc industry department more and more extensive use. But because its coefficient of thermal conductivity is chemical and small, active big, cutting is out of shape coefficient is small wait for a reason, titanium alloy makes material of a kind of difficult treatment. The way that insert mill calls Z axis milling the law again, cutting efficiency is taller than general milling 4 ～ 5 times, lead a respect to have an advantage in the big purify of difficult cutting material especially, it is one of treatment methods with the most effective cutting of metal of rate of implementation tall excision. If the graph is shown 1 times,insert mill objective. The cutting force that Tianjin university inserts mill process to alloy of aluminium alloy, titanium undertook metrical with the analysis, the exponential experience that used recursive law to build strength of 3 direction cutting is formulary, the maths that inserts force of mill process cutting to titanium alloy built a model to undertake study, discovery odd tine and result of many tine emulation result and test compare be identical. The Jeong Hoon Ko dynamic character that analysed process of the treatment that insert mill and stability, built a cutting force model that is based on cutting tool to move quickly, it is OK to should emulate a model the parameter of variable of time of cutting sum of errors according to cutting tool is force, torque, oscillatory to cutting undertake forecasting. The Shunsuke Wakaoka treatment precision in inserting mill process to titanium alloy, hot rigid and treatment efficiency respect undertook study. The characteristic that this studies to titanium alloy inserts mill for development provided important reference. This task in order to insert mill titanium alloy (Ti-6Al-4V) when use numerical control milling cutter is research target, evaluate theory integratedly in order to blur to be a foundation, undertake evaluating to cutting tool function through the experiment. Function index evaluates evaluation object integratedly to also say much target is decision-making, show the thing that affects to getting a variety of factors or phenomenon have total opinion. If this kind evaluates a process to involve ambiguous element, call ambiguous and comprehensive assessment. Ambiguous and comprehensive assessment uses ambiguous maths method, the object that affects to getting a variety of factors and thing have total opinion, the much plan that reachs pair of fuzzy concept thereby and the purpose is optimized in what a variety of evaluation levels fall. The factor that affects of low quality of cutting tool actor is very complex, affect each other between each element, evaluate the stand or fall of cutting tool very hard alone with a certain element, because this problem suits application,faintness is evaluated integratedly. 1 evaluation object is in cutting force, heat in metal cutting, wear away and choose in oscillatory test data have representative test data to regard the function that inserts processability of milling cutter cutting to be able to be evaluated as index. Some model that this task provides to 4 kinds of different manufacturers but the cutting function of razor blade of dislocation hard alloy undertakes contrasting study. If parameter of cutting tool geometry expresses 1 to show. The size of force of cutting of 2 cutting force decided Nextpage 　 　 the power in cutting treatment process and size of metabolic of treatment machining complex, affect the generation of heat in metal cutting directly, make cutting tool becomes blunt and lose cutting ability. Accordingly, the size of cutting force can serve as one of marks that measure performance of cutting tool cutting. The cutting parameter that chooses from inside the test data of 4 kinds of razor blade includes: Cutting speed Vc is 35m/min, 45m/min, 55m/min, fz of every tine feed is 0.

04mm, cutting width Ae is 8mm, cutting deepness Ap is 10mm, analysis advocate cutting force of direction namely Z Xiang Li, if express,2 are shown. Heat in metal cutting of 3 　 of heat in metal cutting are one of important physical phenomena in metallic cutting process. Many heat in metal cutting makes cutting area temperature elevatory, affect cutting tool directly wear away, because this heat in metal cutting also is the main factor of bad of actor of evaluation cutting tool. Experiment through heat in metal cutting, undertake below different condition to 4 groups of razor blade cutting experiments, comparative the cutting temperature that its produce, if express,3 are shown. Constant regular meeting causes the vibration in process of cutting of metal of 4 oscillatory 　 to already machined exterior surface roughness increase, spare parts loss of accuracy, cutting tool wears away the ultimate process capability of aggravate, machine tool is gotten by limitation and working environment the problem such as noise pollution. In addition, vibration also is a when implement treatment process automation serious obstacle. Accordingly, the oscillatory size of the cutting tool in cutting process is a when evaluate performance of cutting tool cutting main index. Experiment through cutting, undertake contrast to the oscillatory circumstance of 4 kinds of razor blade, if express,as a result 4 are shown. From the graph 2 vibration advocate can reach on directional amplitude, stability from good it is to poor order: Bit 1, bit 2, bit 3, bit 4. 5 cutting tool of Nextpage 　 　 wear away cutting tool cutting part is bearing in cutting process very great cutting power and very high cutting temperature, return at the same time with cut bits and treatment surface to produce intense friction, this makes cutting tool grinds blunt invalidation gradually. Wear away can machine function with the cutting that will measure cutting tool, and it is one of main factors. To the cutting of 4 groups of cutting tool the experiment makes clear, of cutting tool basically wear away the form wears away for felt and mechanical wear, among them felt wears away more serious. From the graph 3 in can see, advocate cutting blade stands by point of a knife before knife face part accumulates bits tumour apparently; Felt of part of point of a knife is more serious; Deputy cutting blade stands by felt of part of point of a knife to wear away not serious; Advocate face of the knife after cutting blade has slight felt to wear away. Cutting tool wears away to be in centrally advocate of cutting blade before knife face and advocate the part of point of a knife of cutting blade and deputy cutting blade. Undertake comparative to the wear out condition of 4 groups of razor blade through scanning report lens, among them bit of 3 wear away least, bit of 2 wear away the most serious, and bit 4 with bit of 1 wear away state close. Faintness of cutting tool function evaluates a model integratedly ambiguous and comprehensive assessment tells from main measure can divide for two strides: It is to press only factor to be evaluated alone, namely one class faintness is evaluated integratedly; 2 it is to press all elements to be evaluated integratedly, namely 2 class faintness is evaluated integratedly. Through one class ambiguous and comprehensive assessment gets only factor of cutting force, heat in metal cutting, oscillatory, tatty evaluates matrix, after normalization is handled, be as follows. Cutting force: B1={0.

341, 0.

189, 0.

102, 0.

368} ; Heat in metal cutting: B2={0.

418, 0.

385, 0.

180, 0.

017} ; Oscillatory: B3={0.

458, 0.

364, 0.

178, 0} ; Wear away: B4={0.

238, 0.

143, 0.

381, 0.

238} . The basis is produced actual in the investigation of circumstance of cutting tool choice and statistic make judgement. Cutting tool is fought wear away the discretion of function behaves the durability that is cutting tool directly, the biggest to the influence of cutting tool function, the influence of power of heat in metal cutting, oscillatory, cutting to function of cutting tool cutting degree is ordinal and degressive. The weight of each element is respectively: Cutting force is 0.

1, heat in metal cutting is 0.

3, vibration is 0.

2, wear away for 0.

4, namely weight matrix: A= {0.

1, 0.

3, 0.

2, 0.

4} . The evaluation matrix that 2 class evaluate integratedly is: The eventuate that 2 class evaluate integratedly: The result that 2 class evaluate integratedly makes clear, bit the cutting function of 1 is best, bit 2 with bit 3 take second place, bit 4 poorer. The use that produces the spot proves afore-mentioned evaluations are correct, this and the faintness that milling experiment studies evaluate conclusion integratedly to agree. Last word originally force of task general cutting, heat in metal cutting, wear away to regard an evaluation as the element with vibration, the cutting function that inserts mill milling cutter to 4 groups had ambiguous and integrated opinion. The result makes clear, have bit the razor blade of 1 geometry appearance and structure inserts mill in titanium alloy very good cutting property is had in the process. Research result is actual to production in of cutting tool function determine the referenced value with reach cutting tool to choose to have fair. CNC Milling