In current gear manufacturing industry, the technology of tooth form treatment of each company is roughly same. Car gear great majority uses technology of tine of the top gem after gear hobbing shave ages and be being heated up, a few enterprise and partial car company use technology of the roll flute after gear hobbing and heat, and course of study of burden positive drive uses grinding work rolling heat generally art. Gear hobbing held 70% above share in respect of the treatment that make a tooth-like part of anything, use sense of high speed gear hobbing great. To realize high speed gear hobbing, gear-hobbing machine must raise tigidity, enhance the drive power of hob head, improve function of numerical control, servo, implementation temperature compensation is waited a moment, also want promotion to use high-powered, efficient cutting tool at the same time. The hob data that in be being produced at present, uses is given priority to with high-speed steel, also use hard alloy sets a hob or hob of hard alloy of integral powder metallurgy. High-speed steel hob uses coating processing more, the cutting tool material such as the M35 that exemple as usual uses, M42, A4, apply TiN coat, its matrix tenacity is good, coating heat-resisting, wear-resisting, prevent collapse blade, cutting rate can rise to 120 ～ 150m/min. The hob of integral hard alloy that uses legal system of figuration of pulverous metallurgy agglomeration to build, also have better effect. This kind of cutting tool passes coating processing, cutting rate can rise 250m/min above, axial feed can achieve 3 ～ 6mm/r. And want equipment condition to allow only, but implementation doing is cut. Use dry cut can reduce the oil that cooling fluid of original use cutting brings the mist pollution to the environment, and the performance with excellent cutting tool of hard alloy coating makes its service life is lengthened greatly, can reduce finished cost. The hob when gear hobbing and workpiece are equivalent to the worm worm wheel of a pair of mutual clench the teeth, according to the pattern that extends continuously, the edge of linear tooth form of hob wraps subsidiary channels in the human body through which vital energy to cut workpiece involute tooth form. Roll the treatment that cuts treatment to want to be sequel, if the roll flute after the shave tine before heat treatment or heat treatment stays,have appropriate mental allowance, tine root part is machined in gear hobbing come a requirement. Hob rotate speed is higher, head number is more, cutting time is shorter. To improve efficiency, besides raise hob rotate speed and feed rate beyond, answer to use bull hob as far as possible. Increase a number to be able to raise cutting rate apparently, reduce number of cutting blade cutting, be helpful for hob cut, decrease wear away, improve cutting tool life. Hob is general and commonly used 2 ～ 4, also have 5 ～ 7. The diameter that increases hob and knife chamfer number can increase the ply that cut bits, also can improve productivity. But because cutter diameter gets place of machine tool structure,be restricted, increscent margin is not big, increase knife chamfer to count the intensity that can affect tooth below a lot of circumstances, reason appeared will two, 3 alveolar close and be the double tine hob of one or 3 tine hob. This kind of hob can be used at already thick cut, also can use at essence of life to cut. Cutting dosage can be increased after tooth intensity rises especially, improved cut bits to form a condition, the requirement edge that still can get used to heavy cut is whole where a thing can be put to best use is sound distributinging cutting area. Compare with common hob photograph, efficiency raised 4 ～ 6 times, friend often says attach most importance to cutting hob. In process of whole gear hobbing, feed of axial of hob edge workpiece while, even displacement of edge hob axial, make change knife motion namely, make all tooth on hob participates in cutting, of balanced tooth wear away, raise cutting tool durability. If discover surface roughness of workpiece tooth flank is apparent addle, glazed grow in quantity of spot, burr or sound are abnormal, should seasonable blade is ground. The method that uses the gear after hard alloy hob is hard to temper by dipping in water to undertake machining already had old application in the enterprise, but fall in most circumstance, just use at replacing kibble. Because rolling cut is hard,this is when tooth flank, cut the hob when be being cut play let cause mutation of workpiece tooth form, additional, extruding high temperature of the instant makes anneal of workpiece tooth flank generates soft spots, affect the osculatory intensity of workpiece, reason uses its metal excision to lead taller than roll flute characteristic, replace kibble to have better effect. Figuration of useful also hard alloy blows the example that mill bit body has finish machining succeeds to snail bevel gear, but figuration cutting tool is very costly, life is finite also, application is not wide. To inside tine, double couplet or much couplet gear, often use the technology that insert tine. Compare with gear hobbing photograph, although both all be to press those who exhibit a principle to have the job, but the influence that inserts the cutting tool when tine to cut motion of fluctuation of the concussion that cuts, cutter spindle to get force, unless craft condition disallowance uses gear hobbing, won't use the technology that insert tine otherwise. Also because of this, the research progress that does cutting to insert tine to machine a method is not great. On modern large gear-hobbing machine, can configure internal gear milling head according to the requirement of the user, use dish of form milling cutter, with mill era is inserted, the graduation that chase tine excises mental allowance of ring gear tooth form, method of grinding of the tine inside follow-up reoccupy gets final tooth form. With use photograph of the craft that insert tine to compare, efficiency rose multiple. Of course, suffer inside the limitation of tine milling head, workpiece internal diameter wants enough big. Additional, collecting generation of mill of in order to to insert a method when aging continuously inside milling, the cutting blade of milling cutter of essence of life is OK the involute appearance like make it workpiece, the surplus that roll flute leaves beforehand after treatment but a few smaller; Inside milling when inclined tine, although blade holder can press helix angle to pull,change a point of view, but dish shape milling cutter cannot be made in that way like gear hobbing exhibit continuously, the tooth form that cuts consequently is approximate involute, the surplus that leaves roll flute wants a few more largish. Of high-power inside tine milling head uses the mechanical drive chain that increases negative charge beforehand, electric machinery or drive of hydraulic pressure motor, offerred postulate for efficient treatment. Use the coating milling cutter that optimizes cutting parameter or hard alloy to set a milling cutter, more to raise a metal to excision is led and lengthen cutting tool life was offerred assure, and can implementation doing is cut. For example, contain in P1600/2000 inside 107 tine are machined on the efficient gear-hobbing machine of tine milling head, 9 modulus, 8 degrees of helix angle, 210 millimeter facewidth, the internal gear of 42CrMoS4 material, use empty Leng Gan to cut, tine time is total mill 135 minutes (one-time cutting) , and same excision amount, machine on general accuracy machine tool with the method that insert tine, also get 3 days two at least! The user is taller and taller to reducing the demand of gear noise, technology of conventional top gem of heat rolling shave is restricted as a result of ability place, cannot satisfy this one requirement. If use,roll heat to grind craft, because make,make cost again exorbitant let enterprise policymaker hesitate. To the car transmission gear wheel that large quantities of quantities produce, puissant inside age honing annulus top gem ages craft resolved this one contradiction well, for gear finishing treatment provided a kind of feasible means. Surplus of the biggest honing does not exceed technology of conventional top gem tine 10 micron, just make finishing machine on the tooth flank of heat treatment of the classics after shave ages, improve quality of a few surfaces, cannot improve tooth form teeth directional consequently. Puissant inside tine top gem is different however, can be opposite after heat treatment bigger mental allowance (50 micron of 20 ～ ) have precision work, satisfy craft requirement; And meshy grain can be formed on tooth flank, the periodic strip grain that gets when unlike roll flute, reason can reduce frequency of clench the teeth of teeth of a cogwheel, reduced noise thereby. Honing tool can use colophony felt arenaceous, also can use corundum or CBN honing annulus. When the tine outside treatment, for managing cost, use normally but the honing of colophony felt type of nap annulus, king Kong is used when nap nap annulus undertakes nap. In the car gear that puissant top gem ages craft basically applies at large quantities of quantities to produce, workpiece modulus 0. 6 millimeter of 3 ～ , diameter 250 millimeter of 10 ～ , facewidth 50 millimeter of 20 ～ , final gear precision can reach 6 level taller even, finished cost is the half of roll flute about. CNC Milling