New-style the milling treatment of stator of drive of face exceeding annulus

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Summary: In the light of a kind new-style the treatment method that exceeded structure of annulus face drive to put forward its stator tooth flank, the milling that passes the stator in realizing new-style drive to the adjustment of horizontal milling machine machines: The interference issue that be adjusted to the machine tool that involves in treatment and registers design of round of computation, milling cutter and need attention undertook elaborating, gave out to machine example. Graph 1 new-style transmission graph shows face exceeding annulus 1 times to exceed annulus face drive new-styly for a kind, worm of the dambered surface in the graph 1 pass motion all cloth is in a certain number of its circumferential planetary gear 3 on, stator 2 do not move, planetary gear 3 drive department staff 4 output motion. This is a kind of new-style planetary worm main transfer machinery, to realize stator the sex of favorable treatment craft of 2, planetary gear 3 on the snail annulus motion of hemi-spherical ended shape insert exhibits stator on the columnar face of 2, the clench the teeth between both is a kind of approximate clench the teeth. The stator in new-style structure (spare parts structure is the helical gear inside cylinder) contact transmission for the join of implementation and planetary gear, general helix angle is bigger, and tooth form often dispute involute tooth form, with the machine tool that insert tine treatment has certain difficulty, so we used the method that machines stator with dividing head on X63W all-purpose milling machine. Stator is machined on milling machine, a few problems must solve: The machine tool adjusts with hang round of computation: Milling cutter design: The problem interferes in milling treatment examine etc. 1 machine tool is adjusted with when hanging round of computation to age in the mill on milling machine, the transmission system of fore-and-aft workbench and dividing head should make the machine tool corresponding adjustment, make fore-and-aft feed guide screw is driven while fore-and-aft workbench is mobile, via hanging annulus drive dividing head to make workpiece makes divide evenly fast rotate, in order to achieve the opposite exercise of cutting tool and workpiece, final treatment gives inclined a tooth-like part of anything. Among them, the roll of workpiece and shift must be coordinated undertake, in order to get accurate inclined tine lead, this is the fore-and-aft feed that passes a machine tool hang appropriately between guide screw and axis of dividing head side annulus will assure. To win formulary tooth form, must make workbench undertakes angle is adjusted above all, make alveolar teeth directional and milling cutter rotate flat look is consistent. Popularly, the angle of milling machine workbench adjusts limits to be between 45 ° of ± , if machine helix angle to be less than the workpiece of 45 ° , the angle that should make workbench has turned inside horizontal and workpiece helix angle are equal, and the attention is become inside when helical gear is Zun Xuan, workbench arranges hour hand roll: When workpiece is dextrorotation, workbench is anticlockwise rotational (when treatment internal gear carries the) when tine on the head. If machine helix angle to be more than the workpiece of 45 ° , can add through increasing the adjustment that mesa perhaps finishs angle with workbench collaboration alone. If the graph is shown 2 times, b is inclined tine helix angle, d is workbench level corner, a is add mesa (connect with workpiece and firm of dividing head bearing) the opposite corner with workbench, have B=d+a. To hanging annulus choose, popularly, to the traditional method that machines helix chamfer, because machine tool and workpiece do not have opposite corner, be in thereby choose hang annulus when, assure to become workpiece is fore-and-aft when sending into a lead, workpiece just improved circuit is OK. But afore-mentioned hanging annulus the case that chooses a method to apply to workpiece to turn together along with workbench only, after the machine tool does what the graph shows 2 times to adjust, hang annulus transmission changes somewhat than be about. Right now the advancing distance L of workbench has passed the motion to the machine tool to undertake be analyticed afresh will get with respect to need. In the graph 3 in, v1 is a machine tool the speed of fore-and-aft feed, v2 is the circumferential speed that workpiece rotates, v1=V2sin(90 ° is satisfied between both - B)sind namely L=pD → L=pDcosbcosbsindsind(1) and hang round of transmission comparing to also want to turn into at the same time Z4L(2) of I=z1 × Z3=40tz2 × pursues workbench of 2 machine tools adjusts a figure 3 treatment speed analyses a scheme when the design milling of 2 milling cutter machines the helical gear inside cylinder, because the osculatory line of cutting tool and workpiece is flat curve no longer, the cut look with the consequently sectional either of the blade form of cutting tool and tooth flank is not same, must recount. The coordinate that if the graph is shown 4 times,builds is, among them S(1)=[O(1) : I1 → , j1 → , k1 → ] the coordinate that connects to originally with posture of primitive tool cover is, s(2)=[O(2) : I2 → , j2 → , k2 → ] for with inside the coordinate that firm of helical gear bearing connects is, s=[O: I → , j → , k → ] fasten to assist fixed coordinate, 3 reference axis photographs of 3 its reference axis and S(2) are parallel, but origin and O(1) photograph coincide, k1 → , K2 → is the rotor line coincide of cutting tool and internal gear respectively: A is apart from for the center, x is the axial angle of cut of cutting tool and helical gear, its value is X=90 ° - B, but negative worth is taken when inclined tine is Zun Xuan. Graph plan of concern of coordinate of the helical gear inside 4 treatment sets inside equation of inclined tine tooth flank is {x2=x(u)cosv-y(u)sinvy2=x(u)sinv+y(u)cosvz2=z(u)+pv(3) type in: {x(u) , y(u) , z(u) is bus equation. According to coordinate commutation has inside helical gear fastens medium expression {x1=a-x2y1=-y2cosx-z2sinxz1=-y2sinx+z2cosx(4) and tooth flank to fasten the expression {x=x2-ay=y2z=z2(5) in S to be in in fixed coordinate in S(1) coordinate primitive tool cover and inside in the motion of clench the teeth of helical gear, have 12={-zsinx-ycosx of → of relative speed V, xcosx, xsinx}(6) sets {nx2, ny2, nz2} is inside the coordinate of unit law arrow that helical gear tooth flank assumes office to was in, criterion by → of V12 of · of → of F=n of equation of clench the teeth, nx2(7) of · of Ny2+z2 of · of F=(a-x2+pcotx) · Nz2+acosx has equation of primitive cutting tool so will seek form of milling cutter blade below X1=a-x2y1=-y2cosx-z2sinxz1=-y2sinx+z2cosxF=0(8) : Because of the form of milling cutter blade that says normally the axial cut form that is the primitive tool cover that points to it, make so type (the Y1=0 in 8) , the interference problem in milling of dish of {R0=(x12+y12)½z1=-y2sinx+z2cos X(9)3 of form of blade of shape milling cutter is machined is in on milling machine inside treatment inclined tine when helical gear, still need to notice to interfere the happening of the problem, namely cutting tool to machine a complete tine, whether can come in and go out freely tine circle. To avoid the occurrence of interference, must notice the requirement that the structural parameter place of the structural parameter of workpiece and cutting tool must satisfy above all. Additional, in the process of the helical gear inside milling, the does not have deformation workpiece surface that accords with a regulation to make sure treatment goes out, contented cutting tool and work are divided when modelling outside tangent contact (namely equation of clench the teeth has solution) , primitive cutting tool still must assure to be located in outside work style, do not produce interference. Popularly, the condition that interferes to curvature arising when treatment internal gear is: The either that has spool thread in perpendicular Yu Dao is sectional inside, the curvature radius R0 of transversal of primitive tool cover must is less than or be equal to helicoid transversal to nod the curvature radius R of place in the contact. To internal gear, when | R0 | ≤ | R | When, do not produce interference. Linear to having or smooth connective for the work check form of protruding curve, want to satisfy tangent contact requirement only, so interference condition is inevitable also and contented. And to distinctive tooth form, pointwise examines this condition is too trival rather. The author discovers in practice, use rapid, accurate, quick computer algebra system to serve as auxiliary tool, can pass completely only seek work apparently whether to put in a kind of bound to nod (the root cuts bounds to nod) can judge interference issue. In the operation of solid reality border that 4 stator milling processes, through be being adjusted to the angle of machine tool workbench and dividing head, we use X63W horizontal all-purpose milling machine came true new-style the treatment of the helical gear inside the big helix angle that involves in structure of drive of face exceeding annulus, if the graph is shown 5 times,machine a process. If the graph is shown 6 times,machine the internal gear tooth flank after finishing, because machine place to compare stale with horizontal milling machine, error of machine tool accumulative total is bigger, precision of the tooth form after milling 8 class, essence of the tooth flank after roll flute reachs 7 level. Graph 5 inside the treatment on horizontal milling machine helical gear pursues 5 conclusion can discover the internal gear tooth flank after 6 treatment are finished, the stator treatment method that article place uses is effective. On horizontal milling machine treatment decides the period of the day from 11 pm to 1 am, need computation to give one combination to be hanged just only annulus, the point of view that presses lathe bed, dividing head and workpiece computational earning undertakes adjustment, installation, design treatment appropriative cutting tool can. And machine on the machine tool that insert tine, design treatment to special helix is covered and insert tine knife even, process is complex, treatment difficulty is greater. Accordingly, inside the treatment on horizontal milling machine helical gear simplified apparently to technological equipment change one's costume or dress process, cost is lesser, small lot of can yet be regarded as produces the effective method of this kind of workpiece. Of course, the work that gives to assure a treatment has taller precision, choice drive precision is opposite better milling machine is necessary, make sure from milling machine transverse feed guide screw arrives as far as possible the athletic consistency in a series of transmission link of dividing head and accuracy. CNC Milling CNC Machining