Turning steel material applies mediumly in mechanical spare parts

2% , can improve bit life greatly, and can get used to higher cutting rate. Come a few this years coating technology also is developing ceaselessly, if develop by monolayer multilayer even accept rice is multilayer; Ply also is added by M of a few μ to ten μ M, more even, function of coating material sort and deposit technology are more and more advanced also; The hard alloy that serves as base material also develops to get used to those who machine a requirement to provide by onefold isotropy tilt the structure of function. The cutting that is aimed at material of this the largest amount machines a requirement, classics of company of 3 water chestnut is old research and development, rolled out material of new UE series razor blade successfully. Graph 1: The data of UE series cutting tool that turning steel uses pursues the composition that 1 concise the earth's surface showed UE set, each brand and their choose notional plan. The ordinate in the graph can be expressed cut deep (back penetration of a cutting tool is measured) , the abscissa expresses feed. The circle that brings gap it is thus clear that is in in coordinate origin, show an edge near 45 degrees of lines each are cut deep the cutting condition with feed, when undertaking slight interrupted cutting, recommend the concrete shop sign of chosen UE series cutting tool, can single out the corresponding chamfer that break bits at the same time. If should be cut deep as lesser as feed when, can choose UE6010 and SH to break bits chamfer, if cut deep increase up along 45 degrees of lines roughly with feed, stated area of the cut that cut bits increases gradually, when cutting bear increases gradually, ordinal and optional break bits chamfer with UE6010 material and MV and GH, when cutting when the area is larger, can choose UE6020 material and Hx to break bits chamfer. Be like on workpiece without keyway, breach when, right now cutting calls successive cutting, if mental allowance is even also, not be the surface layer of cutting workpiece, however cutting its lining, the installation tigidity that is like workpiece additionally is taller, not easy generation is oscillatory, when cutting force is roughly right now constant, the cutting below above condition belongs to stable cutting range, see a picture the wrong upper part of 1. In the cutting inside this limits, along with cut deep the accretion with feed, but material of individual choice UE6005 and SH, MV, GH breaks bits chamfer, should cut mix greatly UE6010 material and Hx can choose to break bits chamfer when feed is bigger. Graph the circle that the right lower part of 1 has to bring 4 gap, figure ground expresses to more intense interrupted cutting is formed when the breach on workpiece is machined more. Mental allowance not all, cutting of blame workpiece lining however hardness is tall and not even cuticular cutting or the cutting when the installation tigidity that is workpiece differs Yi Zhen to move, belong to not stable cutting range, basically can choose UE6020 material right now, along with cut deep with feed increase but the chamfer breaking bits with ibid corresponding choice. UE6035 should be chosen to reach the corresponding trough that break bits when not stable condition is more serious. Why to choose so? Because of UE series, if these 4 kinds of material pursue 1 be equivalent to ISO international standard arriving from P01 respectively the different grade of P40, smaller table hardness exceeds the number of above tall, more wear-resisting, can get used to higher cutting rate more, number expresses tenacity greatly more taller, more impulse withstand, but accommodative cutting speed is relatively inferior, this from pursue 1 times right recommend cutting condition to also can see. Before showing UE series characteristic, first brief explain to make the scathing issue of cutting tool invalidation. The hard alloy of material of current cutting tool, cermet, pottery and porcelain, CBN (fracium nitrogen changes boron) , PCD (man-made gets together brilliant diamond) wait for agglomeration material to give priority to, the utilization rate of high-speed steel had dropped. The injury of agglomeration material has like configuration and high-speed steel wear away (Wear) , wearing away is a kind of advance gradually length of injury and cutting time, cutting is relevant. Because be the character that agglomeration material has him again namely hard and fragile, tenacity is insufficient, because of,meet in cutting process cutting force, of heat in metal cutting fluctuant cause the instant and low loop impact, and form brittleness to injure (Brittle Fracture) , performance of this kind of loss is (1) appear on edge a few little gap say to be short of caustic or small collapse (Chipping) . (2) serious when generation big gap weighs damaged or collapse knife (Broken Fracture) . Little gap appears on edge, when be short of caustic namely, cannot reoccupy does precision work, but can continue to do rough machining to use below certain circumstance. (3) in be being machined additionally, the part cuts bits felt (Adhesion) frit writtens guarantee (Welding) around edge. General felt, frit writtens guarantee wearing away is a spare parts, blame agglomeration cutting tool injures one of reasons, will tell possible generation felt to agglomeration tool material, frit knot wears away, but mainer is the felt cutting bits that as firm as cutting tool surface union is together, frit form content, the tumour that accumulate bits is in after be being pounded by follow-up treatment, make it and cutting tool surface detached forcibly, in this process, detached while also take away data of cutting tool share together caused felt, frit knot is short of caustic and damaged, reason should avoid to cut the felt frit tie of bits as far as possible in spot treatment. Of course they still affect treatment surface quality. (4) agglomeration material heat conduction needs the loss such as easy generation hot crack. Material of coating of series of UE of company of 3 water chestnut is good counteractive above just about injury of these main cutting tool, make sure efficient and macrobian life is machined and development comes out. These 4 kinds of coating all use UE series CVD (law of deposit of chemical gas phase) make, layer of this law film can be made thicker, wear-resisting, high temperature resistant, can get used to high speed big feed, cut deep cutting greatly. UE series 4 coating apply the most widely with UE6010, UE6020. Have versatility, typical sex most. Graph 2 organize structural picture for UE6010 and UE6020. Graph 2: The data of UE series cutting tool that turning steel uses by the graph 1 knowable, on 45 degrees of lines, as the first recommending is UE6010, because it has quite tall hardness already very wear-resisting has the tenacity that comparative to be able to get used to certain interrupted cutting and concussion again, its matrix hard alloy is to tilt structure, namely each function function is different, the stratosphere tenacity that is united in wedlock with coating is big, make sure coating is united in wedlock can firmly with it, be able to bear or endure be short of caustic and damaged, ministry of core of matrix hard alloy is done flintily, fight be out of shape capability is strong. Coating divides a layer in all, be united in wedlock with matrix most lining is TiCN fiber columnar and crystal, second layer hardness also has the tenacity that comparative high, can resist around knife face wears away well. Among one is the Al2O3 with imperceptible grain, its hardness can amount to HY2100, its generate freedom to be able to be worth amount to - 100Kcal/g.

Atom this value represents chemical stability, the value heals small chemical stability has healed, hear resistance is better, this is in when high speed cutting, produce cutting tool and workpiece material element to diffuse each other hard, cause banding the flow that cuts bits is advanced the crescent moon that knife face causes wears away depression, this fuse that issues pair of iron in high temperature condition is spent it is almost 0, make knot of not easy frit is in scrap its surface, all sorts of loss that also avoid to be caused accordingly thereby. It is by distinctive flowing coating technology (Even Coating Technology) on besmear, the surface is particularly slick, on this foundation the surface besmears again compound of a special titanium, this keeps flowing, make coefficient of friction is reduced, reduce the felt frit tie of scrap further. Because it is golden yellow, discover the small loss that produces possibly more easily. Recommending when choosing UE6010, special still recommended suit the MV with cutting extensive condition to break bits chamfer, this both is united in wedlock excellently, more increase its versatility. UE6020 each structure and function character and UE6010 of character of structure of matrix hard alloy are roughly identical. But its film layer is thinner (graph 2) hardness is lower than UE6010, wearability is poorer, accommodative cutting speed is inferior also but the cutting speed limits that recommending (graph 1) next wearability that still can keep quite tall. Its bending strength, tenacity and impulse withstand UE6010 of force criterion prep above, suit not to stabilize the cutting inside cutting limits. In concussion load action falls, thick film may crack be no longer in force, velar layer reliability drops, thick layer is more impulse withstand reliability is high. Be aimed at the use condition of UE6010 and UE6020, if be in successive cutting, very stable cutting condition, can choose hardness further taller more the UE6005 of wear-resisting, concussion load is very right now small do not have even, can press recommend the cutting with easy more efficient implementation of taller cutting speed. Be like interrupted cutting instead, when concussion load is bigger, can choose taller than UE6020 tenacity, the UE6035 with greater bending strength, work below commendatory cutting rate, although rate fell (graph 1) , but avoided cutting tool to be short of caustic, damaged, make cutting tool service life is lengthened, avoided to change often bit, shortened auxiliary time, improved cutting efficiency likewise. CNC Milling