Pare from layer of a flight of stairs knife of puissant Duan Xi

The upright milling cutter of 25m, the knife of heavy-duty Duan Xi of diametical 2m above is the country such as Germany, United States and Japan raised milling efficiency to produce very big effect. Large scale computer waits to fetters in heavy machinery, heavy electrician, heavy chemical industry to shorten the difference of as advanced as the world country in making, production surplus of semifinished product of heavy machinery of combinative our country is too large (80 ～ 200mm) and surface are concave and convex not all the current situation, very be necessary to increase strength to the research of knife of heavy-duty Duan Xi. For this, we had old research to knife of heavy-duty Duan Xi, it is fundamental creativity with free cutting theory land development went knife of a kind of puissant Duan Xi. It relies on the combination of different tool cutting edge angle and position of point of a knife, form a flight of stairs and special cut, outside dividing end rank tooth, the others tooth all belongs to free cutting. Friend call this kind of milling cutter pare from layer of a flight of stairs knife of puissant Duan Xi. Graph 1 free cutting pursues because fundamental of cutting of 2 blame freedom is heavy-duty surface layer of semifinished product of mechanical casting, forging is right impact of temperature of force of cutting tool durability, milling and milling is very big. So, how to protect the point of a knife of tooth of milling workpiece surface layer and the working length that increase cutting sword, make development from a flight of stairs the guiding ideology of knife of puissant Duan Xi. Protecting the way with best point of a knife is to let only advocate cutting blade attends cutting and point of a knife does not participate in cutting. Contented main point wants when free cutting becomes reason to pare from layer of a flight of stairs the knife designs puissant Duan Xi. Free cutting and cutting tool of blame freedom cutting are in cutting process, the cutting kind that only blade of a linear cutting attends cutting calls free cutting (1) seeing a picture. If the cutting blade on cutting tool is a curve, or blade of a few cutting attends cutting, complete whole cutting process at the same time, it is blame freedom cutting (2) seeing a picture. Latter and former photograph are compared, not only the metal is out of shape complex, and point of a knife wears away very easily or damaged. The experiment considers to make clear: Below coequal cutting condition, when the cutting temperature of free cutting and cutting force compare blame freedom cutting respectively low 50% with 30% above, durability of free cutting cutting tool raises 20% above than be not freedom cutting. Accordingly, we begin to study theory of will free cutting is used at a flight of stairs to carry milling cutter. Milling graph forms milling graph with what free cutting reachs a flight of stairs is the cutting graph in milling treatment. It is whole on tool reference plane be been in by the metallic layer of excision by cutting blade gradually intersected graph, namely the summation of cut appearance. What milling graph can explain cutting blade excises the order of metallic layer and cutting from workpiece is successional, bear of the position that can reflect blade of each paragraphs of cutting to work, cutting allocates, surface of cutting condition, treatment forms process, cent bits and the effect that break bits. Design the key that optimal milling graph is milling cutter design so. Point of a knife tall, differ the design that diametical a flight of stairs carries logo of milling cutter milling. Graph 3 different tool cutting edge angle carry graph of milling cutter milling to pursue point of a knife of 4 two a flight of stairs tall differ the milling graph when the diameter pursues 3 it is common " annulus cut pattern " the milling logo that carries milling cutter, the milling area of two tooth is equal, can increase feed and the negative charge that reduce point of a knife of the 1st tooth, but do not suit bigger back to eat cut an amount. Graph 3a is the milling graph when the Kr2a of tool cutting edge angle of the 2nd tooth is equal to 90 ° , criterion the 1st rank the tool cutting edge angle of tooth but by type (1) computation: (1) graph 3b is the milling graph when the Kr2b of tool cutting edge angle of the 2nd tooth is less than 90 ° , criterion the 1st rank the tool cutting edge angle of tooth but by type (2) computation: (The milling figure that 2) graph shows 4 times and graph 3 photographs are compared, can have amount of larger back penetration of a cutting tool. When radius of point of a knife poor Δ R is less than Afz of every groups of feed when (graph 4a) , to get the optimal milling figure with milling equivalent area, be in the 1st rank below the condition with foregone Kr1a of tooth tool cutting edge angle, the 2nd rank the Kr2a of tool cutting edge angle of tooth but by type (3) gets: (3) is more than Afz of every groups of feed when R of poor Δ of radius of point of a knife when (graph 4b) , to get the optimal milling figure with milling equivalent area, be in the 1st rank below the condition with foregone Kr1b of tooth tool cutting edge angle, the 2nd rank the Kr2b of tool cutting edge angle of tooth but by type (4) gets: (The Δ in 4) type -- mental allowance; N -- the number of divide into equal parts of mental allowance. Manage together, when the 2nd rank when the tool cutting edge angle of tooth is foregone, will amend to get optimal milling graph still can pass computation the 1st rank the tool cutting edge angle of tooth. By the graph 4 knowable, the 1st rank the point of a knife of tooth already was being machined only apparently attended minim cutting, cutting blade did not attend cutting near its. From whole cutting blade working place looks approximate already at free cutting, formed a flight of stairs and the milling logo that carry milling cutter unlike common a flight of stairs at the same time, so the knife names the Duan Xi this kind of accurate free cutting to wait for point of a knife tall differ of the diameter pare from layer of a flight of stairs knife of puissant Duan Xi. The diameter such as point of a knife differs high-ranking ladder carries blueprint of graph of milling cutter milling 5 it is the diameter such as point of a knife differs tall layer of 3 a flight of stairs pares the milling graph when N=5 of knife of puissant Duan Xi. To protect point of a knife, point of a knife should not be in step place; Be measured to facilitate and adjust, the 1st rank the park of point of a knife of tooth the 2nd, the 3rd rank tooth point of a knife is the same as one diameter. This makes the 1st rank tooth realized free cutting thoroughly, name this kind of knife that carry mill so differ for the diameter such as point of a knife tall pare from layer of a flight of stairs knife of puissant Duan Xi. Height of two point of a knife differs the Krn of tool cutting edge angle of random rank tooth and photograph adjacent Δ H but by type (5) , type (6) gets: (5) (6) pursues layer of 5 3 a flight of stairs pares the milling logo that carries milling cutter pursues the Krn in the 6 cutting graph type that carry milling cutter from a flight of stairs is N rank the tool cutting edge angle of tooth, kr(n-1) is (the tool cutting edge angle of N-1) rank tooth. The place on put together is narrated, pare from layer of a flight of stairs knife of puissant Duan Xi and photograph of knife of Duan Xi of common a flight of stairs are compared, cutting graph already was not parallelogram composition graph 2 in that way stair shape, and join into broken line, if pursue,6 are shown. The position that blade of cutting of different group tooth works and milling graph agree completely. The structure is designed and its characteristic is measured to get used to bigger back penetration of a cutting tool and feed and get used to the abominable cutting condition such as difference of semifinished product quality, pare from layer of a flight of stairs the same point of the structural design of knife of puissant Duan Xi and knife of Duan Xi of common a flight of stairs is: Have the larger space that hold bit, the performance that discharge bits is good, tigidity and intensity are higher, geometrical parameter is helpful for bearing bigger concussion negative charge. Differentia is: The measure of groovy deep radial that penknife staff installs on bit body is consistent, knife of this bit of as puissant as blame a flight of stairs Duan Xi is identical. Visible, pare from layer of a flight of stairs the bit body versatility of knife of puissant Duan Xi is good. Install the tooth with identical tool cutting edge angle more on bit body namely, carry milling cutter into close tine, little outfit becomes knife of common and puissant Duan Xi; Install the tooth of different tool cutting edge angle and position of point of a knife, become pare from layer of a flight of stairs knife of puissant Duan Xi. Additional, tooth structure is divided but dislocation type, solder building blocks type, but type of dislocation building blocks and whole solder type. Before 3 person, achieve when tooth edge when grinding blunt standard, bit or knife of building blocks type piece but crossing-over, make the whole cutting blade of all razor blade can get making full use of, improved economy. Conclusion pares from layer of a flight of stairs the substaintial distinction of knife of puissant Duan Xi and knife of Duan Xi of common a flight of stairs depends on: Former outside dividing end rank tooth, the others tooth all belongs to free cutting; And latter and all tooth all belongs to blame freedom cutting. Former cut is not latter in that way academic parallelogram; Former when working normally, go up before first-order tooth cutting, its cut is issued rank tooth excised partial metal ahead of schedule; After that person the 1st, 2, ... rank tooth is ordinal excise its by the metallic layer of cutting. Pare from layer of a flight of stairs knife of puissant Duan Xi each rank place of work of tooth cutting blade is different, medicinal powder hot condition and point getting power is not same also. The 1st rank tooth cuts exterior metal, although working requirement is poor, but its tool cutting edge angle is the smallest, can improve medicinal powder hot condition. At the same time place of cutting blade work is far from point of a knife again, cutting force and heat in metal cutting are very small to influence of point of a knife. Dot getting power is far from point of a knife to be able to raise the tigidity of tooth. From a flight of stairs so knife of puissant Duan Xi suits the efficient milling of large surplus, inhomogenous casting, forging to machine. Pare from layer of a flight of stairs the craft sex of bit body of knife of puissant Duan Xi and versatility are good, reason cost is inferior. Knife piece uses bit or building blocks formula to certain level but crossing-over, make blade of paragraphs of whole cutting can get making full use of. Optimal milling graph is the design pares from layer of a flight of stairs the key of knife of puissant Duan Xi. According to each rank the principle with equal cardinal principle of tooth cutting area, the formula of the difference of height of point of a knife of derivation and tool cutting edge angle is reasonable. CNC Milling CNC Machining