Dispatch of net of machine tool of Chinese numerical control: Machine of roll flute of emery wheel of numerical control figuration applies extensively at report of aerospace, shipping, wind, nucleus report, war industry to wait for nicety of industry of heavy-duty and mechanical drive gear grinding, suit big modulus, little tine to count gear nicety grinding especially. Gear of grinding of machine of roll flute of figuration emery wheel is the figure that becomes nap of form of emery wheel cut as alveolar as gear photograph to suit, gain accurate tooth profile through grinding of move back and forth. The largest dominant position of machine of roll flute of emery wheel of numerical control figuration depends on nap of numerical control emery wheel implement, after providing corresponding software, can grind make all sorts of tooth form repair round horn of root of predestined relationship, tine to transfer all sorts of tine of form of curve, beat, special tooth form, cycloidal tine, circular arc tine and spline. Machine of roll flute of emery wheel of numerical control figuration uses figuration law grinding, precision of form of emery wheel cut is crucial, this depends on precision of cut form calculation and precision of emery wheel nap. Manufacturer of aircraft of domestic and international roll flute had thorough research to technology of nap of figuration emery wheel, developed device of different emery wheel nap, assure the nap precision of emery wheel with this, raise gear grinding precision. The progress that the article introduced respect of technology of nap of emery wheel of machine of roll flute of emery wheel of numerical control figuration and device of existing nap of numerical control emery wheel reach nap technology, to how be being obtained tall profile precision undertook discussion. Method of nap of emery wheel of machine of roll flute of emery wheel of figuration of 1 numerical control basically has King Kong pen and King Kong gyro wheel to the nap of figuration emery wheel two kinds of forms, structure of nap of King Kong pen simple, cost is low, theoretic can obtain taller nap precision. Because King Kong pen wears away serious, life weak point, wear extent hard appraise is measured, cannot compensate accurately, bring about consistency of precision of emery wheel profile to differ, bigger to the grinding treatment influence of large gear wheel, be replaced by place of nap of King Kong gyro wheel gradually. Tall, nap measures tigidity of King Kong gyro wheel big, efficiency is tall, use orbit to include method of subsidiary channels in the human body through which vital energy, suit the figuration surface with complex nap more. The methodological cent of emery wheel of nap of diamond gyro wheel enters type gyro wheel to cut nap and swing nap of type gyro wheel. Principle of figuration roll flute sees a picture 1. Graph principle of 1 figuration roll flute pursues 2 cut of type nap principle (1) cuts nap of type gyro wheel to use when cutting nap of type gyro wheel, diamond gyro wheel rotates in the high speed below drive of nap electric machinery, radial of edge emery wheel is done cut motion, for nap figuration surface, king Kong gyro wheel and axial of emery wheel edge move relatively. If the graph is shown 2 times, when nap figuration emery wheel, nap gyro wheel and emery wheel circle circumgyrate of oneself centre of turning circle with certain line speed ratio. Axes of oneself of emery wheel edge (Y axis) directional reciprocate, oneself of edge of nap gyro wheel is radial (W axis) direction, with certain proportion the relationship follows emery wheel axial moves. Y axis and W axis interpolation walk along circular arc or linear, the centre of a circle of circular arc of R of King Kong gyro wheel takes emery wheel profile equidistant line (see a picture 3) . The contact that uses gyro wheel and emery wheel nods packet of sth resembling a net to give look of emery wheel cut. Cut type nap way taller to the production requirement of King Kong gyro wheel, it is especially when workpiece of number of grinding little tine. On one hand, tine number is less, tine root circle is smaller, the osculatory area of the R circular arc of the gyro wheel when nap emery wheel is large, taller also to gyro wheel production requirement; On the other hand, workpiece tine number is little, involute curvature radius is small, tooth profile curves degree tall, sensitive to radial error, dynamic radial beats the error raised taller requirement after this jumpy to radial of gyro wheel oneself error and installation. The outline that identical modulus, different tine counts see a picture quite 4. Pursue process of emery wheel of figuration of nap of gyro wheel of 3 King Kong pursues the outline that different tine counts 4 identical modulus pursue quite the emery wheel that manufacturer of aircraft of roll flute of figuration of numerical control of unit of nap of 5 pairs of gyro wheel entered type nap principle to develop each to have distinguishing feature according to cutting is repaired, according to nap characteristic, can distribute the gyro wheel that it is sheet and double gyro wheel two sort. Structure of single gyro wheel simple, volume is minor, but nap limits is lesser. When nap big modulus, big tine is deep, need to make the King Kong gyro wheel of big diameter, gyro wheel tigidity is poorer, and interfere easily with workpiece happening. Use single gyro wheel at present but the biggest modulus of nap is 25, use nap of double gyro wheel to be able to avoid afore-mentioned problems effectively. Emery wheel of nap of a gyro wheel a flank, nap modulus is unlimited, can use nap of little gyro wheel, tigidity is good. In medium or small nap of single gyro wheel is used on machine of roll flute of figuration emery wheel relatively common, on machine of large roll flute use nap of double gyro wheel generally (see a picture 5) . (2) swings nap of type gyro wheel is shown 6 times like the graph, swing structure of nap of gyro wheel of type King Kong is relatively complex, need realizes 5 movements: Emery wheel rotates, King Kong gyro wheel rotates, King Kong gyro wheel swings, gyro wheel and emery wheel slant feed of buy, nap. Use this method, king Kong gyro wheel is sectional be in law of emery wheel profile from beginning to end to sectional inside, nap emery wheel uses circular arc of R of King Kong gyro wheel to go up only one is nodded, emery wheel of nap of nib of similar use King Kong. Graph 6 swing sketch map of principle of nap of type gyro wheel pursues 7 swing nap of type gyro wheel uses means of this kind of nap, gyro wheel wears away to be affected to precision of emery wheel profile lesser. Appear when wearing away, can pass radius of circular arc of R of modification gyro wheel, adjust a contact to choose the place, realize compensation. Use point contact nap, reduced demands of pair of precision of gyro wheel outline, but wear away aggravate. The law does not suffer the effect of radius of workpiece profile curvature to osculatory nap, suit little tine to count workpiece. To raise precision, radius of circular arc of gyro wheel R shoulds not be too big, gyro wheel uses dish of odd circular arc structure, the structure is deft, athletic segment is much, tigidity is a bit poor, suit the nap of figuration emery wheel of small-sized workpiece. Swing nap of type gyro wheel sees a picture 7. (If the graph is shown 8 times,3) coordinate builds entire plant, device of polar coordinates nap was united in wedlock to cut pattern nap and swing the characteristic of type rest and reorganization, gyro wheel of King Kong of control of numerical control system fastens medium planar motion to wrap curve of form of cut of axis of emery wheel of subsidiary channels in the human body through which vital energy in polar coordinates, realize nap of emery wheel figuration. When nap emery wheel, nap gyro wheel and emery wheel circle circumgyrate of oneself centre of turning circle with certain line speed ratio. Emery wheel circles centre of percussion to swing, radial of oneself of edge of nap gyro wheel does linear exercise toward emery wheel. Through linear axis and rotor two axes interpolation emery wheel sectional nap is become with the form that treats photograph of chamfer of roll flute teeth of a cogwheel to suit. In nap process, the method extent vector of emery wheel and point of point of gyro wheel contact is identical from beginning to end, the relative speed vector that is in with this bits is mutual and perpendicular. Two axes interpolation, occupy a space small, suit large inside the nap that ages grinding plant institute uses emery wheel. But this kind of means can use nap of single gyro wheel only, but nap modulus is finite, do not suit the nap of figuration emery wheel of deep gear of grinding big modulus, big tine. Graph technology of nap of 2 emery wheel is in of principle of device of nap of emery wheel of 8 polar coordinates in grinding process, emery wheel wears away passivation, need undertakes nap to emery wheel, produce a new sharp profile, make sure precision is consistent at the same time. Tool of emery wheel nap and nap condition have to quality of emery wheel nap showing an effect, decided appearance of emery wheel form and profile precision directly, the sharp degree of nap decides grinding force and grinding temperature, need chooses parameter of reasonable emery wheel nap. Choose emery wheel of reasonable nap of Qd of nap speed ratio. When Qd of nap speed ratio is lesser, the opposite rate of King Kong gyro wheel and emery wheel is higher, wallop is big, emery wheel grinds bead to rupture more, formation cutting blade is sharper, but precision of profile of emery wheel whole is a bit poor, suit thick abrasion to divide bigger grinding surplus; When nap speed ratio when Qd is bigger, the relative speed of King Kong gyro wheel and emery wheel is lesser; Interaction force is given priority to with extruding force, after emery wheel grinds bead to suffer extruding, pointed horn is broken, form more small blade, precision of profile of emery wheel whole is tall, suit essence of life to grind. Through many experiment research and production are carried out knowable, when nap emery wheel, the line speed ratio of King Kong gyro wheel and emery wheel is taken for 0. 3-0.
8, kibble takes small cost, essence of life is ground take big cost. Nap deepness affects emery wheel to grind the feature getting power of bead, when nap deepness is lesser, emery wheel grinds a place to suffer collapse strength lesser, generation is microcosmic and broken, form small blade, profile precision is tall, suit essence of life to grind; When nap deepness is bigger, grind bead to suffer force to rupture broken, partial bond falls off, form acerb cutting blade and look bits space, suit kibble. The choice of nap deepness should consider the measure wearing bead of emery wheel, had avoided large nap amount to fall off abrasive whole, waste abrasive to form accurate profile hard again already. King Kong gyro wheel is used eletroplate or agglomeration method is made, abrasive is natural diamond or all sorts of making synthetic diamond, wait like CVD, PCD. Quantity of heat produces in nap process, destroy diamond abrasive stability, heat in metal cutting makes Fu of frit of emery wheel abrasive, cause jam, the friction when need cooling fluid takes away emery wheel nap in time is hot, clear emery wheel, sweep cut bits, raise nap precision, prolong gyro wheel life. In application of machine of roll flute of emery wheel of figuration of numerical control of 3 brief summary, device of emery wheel nap and technology are crucial, the nap device of all sorts of different principles, different form has oneself advantage. Make technical progress as King Kong gyro wheel and emery wheel, the application of new abrasive progresses with what reach the control technology, online technology that monitor, efficiency of emery wheel nap and profile precision will get rising further. CNC Milling
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