Of cutting of big blade dip be out of shape research

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The speed of 1 bevel cutting is opposite before the research of bevel angle cutting, blade dip Ls almost ≤ of bureau be confined to the limits of 45 ° , when 45 ° of > of obliquitous to blade Ls cut bits to be out of shape, heretofore still unmanned had had specific research. The article with blade dip the bevel angle cutting of 45 ° of Ls > is a foundation, analysed mild steel of cutting of bevel of big blade dip board when be out of shape circumstance. In bevel angle cutting, the cutting speed Vc that work look nods to the some on blade of cutting of cutting tool of bevel angle cutting is dissoluble for perpendicular the speed heft VT that goes at cutting blade at the peace of speed heft Vn of cutting blade, if the graph is shown 1 times, namely Vcsinls of = of Vn = VccoslsvT pursues the speed of 1 bevel cutting is decomposed can see from above formula, the absolute value of blade dip Ls is greater, parallel the speed heft VT at cutting blade is bigger, perpendicular the speed heft Vn at cutting blade is smaller. As the change of blade dip Ls, speed heft VT and Vn also change subsequently. When Ls < when 45 ° , cosls > Sinls, vn > VT, perpendicular at the metallic plasticity of cutting blade flow takes dominant place; When Ls = when 45 ° , = of Cosls = Sinls 1, vn = VT; When Ls > when 45 ° , cosls < Sinls, VT > Vn, parallel takes dominant place at the metallic plasticity flow of cutting blade. blade dip normally the bevel angle cutting of 45 ° of Ls > calls cutting of big blade dip. The cutting of cutting of dip of 2 big blade is out of shape the cutting of cutting of dip of experiment big blade is out of shape circumstance, heretofore has not see research reports. The article is used fall quickly the sample that knife method gets department of the root that cut bits, cut the appearance of specimen of bits root ministry and metallographic grind segment through observation, the cutting of obliquitous to big blade cutting is out of shape undertake relatively comprehensive analysis. · of 1) experiment condition uses a machine tool: Material of cutting tool of B6050B planer · : High-speed steel, the law is forward 30 ° of horny Gn = , law backward 8 ° of horny An = · workpiece material: Ply is 1.

The mild steel of 2mm (dosage of cutting of · of Q235) armor plate: = of cutting speed Vc 6. 12m/min, = of cutting ply HD 0. 2mm, dry cutting 2) the appearance of ministry of the root that cut bits uses different blade dip Ls to undertake cutting, through falling quickly knife method got sample of ministry of two groups of roots that cut bits. Have observation to the exterior appearance of the specimen through scanning report lens, analyse its to be out of shape circumstance. If specimen photograph pursues 2, the graph is shown 3 times. The appearance of ministry of the root that cut bits when 0 ° of = of graph 2 Ls (the appearance of ministry of the root that cut bits when 60 ° of = of 3 Ls of × 60) graph (× 60) from the graph 2 can see, when Ls = when 0 ° , those who cut bits is transverse be out of shape very big, those who cut bits is mid apparently raised because of transverse metabolic extruding, cut bits apparently cut slippage trace very outstanding, the ply that cut bits compares a figure 3 get greatly much. As the accretion of blade dip Ls, those who cut bits is transverse be out of shape reduce. When Ls = when 60 ° , the ply that cut bits is reduced apparently, cut bits apparently the trace that cuts slippage is not apparent already, because the parallel in cutting flows at the metallic plasticity of cutting blade,this basically is be caused by. The metallographic grind segment that 3) cuts bits root ministry pursues of 4 bevel cutting cut cutting of horny Fl bevel if the graph is shown 4 times,cut corner, its by orthogonal cutting cut horny F deflective for Fl, as a result of the existence of dip of blade of bevel angle cutting, make cut bits to pour out of directional photograph the law to cutting blade to deflective an angle Fl(sheds bits horn) , make thereby Fl > F, because be out of shape coefficient Dh mixes,this is cut horny F to exist as follows to concern: Dh= Cos(f+g0) Sinf because this, as the accretion that cuts horny F, be out of shape coefficient Dh is reduced, make cut bits thereby be out of shape reduce. The cutting metabolic that to observe blade clearly obliquitous change causes changes, can cut the metallographic grind segment of bits root ministry through preparation, undertake observing an analysis below metallographic microscope. A.

The metallographic organization on section of law of blade of cutting of edge of ministry of the root that cut bits is out of shape the experiment condition that collects sample of ministry of the root that cut bits is Alexandrine, metallographic grind segment is the preparation on the law section in cutting blade, the blade dip Ls when cutting is mixed for 45 ° , 60 ° respectively 75 ° . If metallograph of metallographic of ministry of the root that cut bits pursues 5, graph 6 show 7 times with the graph. When 45 ° of = of graph 5 Ls perpendicular the metallograph of metallographic of ministry of the root that cut bits at cutting blade (when 60 ° of = of 6 Ls of × 100) graph perpendicular the metallograph of metallographic of ministry of the root that cut bits at cutting blade (when 75 ° of = of × 100) graph 7 Ls perpendicular at cutting blade cut bits, when Ls = when 45 ° , cutting is out of shape big, grain is pulled very longly, cut cut slide surface to be seen apparently, cut bits very thick; And mix for 60 ° when Ls when 75 ° , of grain be out of shape opposite for a lot of smaller, the ply that cut bits is reduced substantially. The enlarge multiple of 3 pieces of photographs is identical, can see change of the ply that cut bits and grain metabolic case intuitionisticly from the photograph. So, when parallel the cutting speed at cutting blade is ambitious at perpendicular when the cutting speed at cutting blade, cutting is out of shape can reduce substantially. B.

The metallographic organization on direction of blade of cutting of edge of ministry of the root that cut bits is out of shape grind segment of metallographic of the preparation on the direction in edge cutting blade, the blade dip Ls when cutting is mixed for 45 ° respectively 75 ° . If metallographic metallograph pursues 8 with the graph 9 are shown. The metallograph of metallographic of ministry of the root that cut bits of direction of blade of cutting of the edge when 45 ° of = of graph 8 Ls (the metallograph of metallographic of ministry of the root that cut bits of direction of blade of cutting of the edge when 75 ° of = of 9 Ls of × 100) graph (× 100) pursues the 8 positions that with the graph 9 medium filament are cutting blade, when Ls = when 45 ° , cut the grain on bits be out of shape area is wider, the grain that bits share cuts in the photograph is out of shape entirely; And when Ls = when 75 ° , as a result of parallel the action of the cutting speed at cutting blade, cut the grain on bits to be out of shape area is apparent narrow, the grain of the upside that cut bits was not out of shape basically. Through be opposite appearance of ministry of the root that cut bits and metallographic microstructure are out of shape the analysis of the circumstance is knowable, of cutting of big blade dip be out of shape very small. 4) blade dip and be out of shape coefficient concerns with what cut meet an emergency. The change that analyses blade dip for intuitionistic ground is affected to cutting bits metabolic, measure scale cut bits to be out of shape coefficient and the relation curve with obliquitous blade (10) seeing a picture, experiment condition is Alexandrine. Cut the conversion of meet an emergency through be out of shape coefficient is mixed, attainable the relation curve that cuts meet an emergency and blade dip (11) seeing a picture. Graph 10 be out of shape the relation graph of as coefficient Dh, obliquitous as blade Ls the 11 relation curves that cut Ls of dip of E of meet an emergency and blade from the graph 10 can see, when Ls = when 75 ° , cut bits to be out of shape coefficient hasten is bordering on 1, cut bits be out of shape very small, the graph that answers relatively with this graph 11 in, cut meet an emergency to E increases as Ls and be reduced substantially. Because use cutting of big blade dip to be able to be reduced greatly,cut bits to be out of shape, in because cutting principle uses dip angle of this will big blade at the metal,growing fibrous cutting to machine, available outspread rate the metal with good, high intensity grows fiber. When 3 conclusion 1) undertakes cutting of big blade dip, parallel is more than at the speed heft of cutting blade perpendicular the speed heft at cutting blade, can reduce cutting to be out of shape substantially; 2) is become when 75 ° of = of blade dip Ls, cut bits to be out of shape coefficient is close to at 1, because the along cutting blade cutting rate when cutting is rising dominant action be caused by,this basically is; 3) applies cutting of big blade dip in treatment of metallic long fibrous, can obtain high-powered metal to grow fiber. CNC Milling CNC Machining