The method of main shaft dynamic balancing and application

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The application that high speed of 1 introductive machine tool turns and development, rotate speed of requirement main shaft rises. But part of series of machine tool main shaft is in production process, inevitable meeting pledges because of material asymmetry of inhomogenous, appearance, treatment is installed compound an error and bring about deviate of centre of gravity to rotate center, make the machine tool produces vibration and oscillatory power, cause machine tool noise, bearing to give out heat etc. Lift as rotate speed, lopsided the vibration that cause is added more intense. Be out of shape as a result of what arise when component of machine tool main shaft is rotational very small, calculate to simplify, reason inspects his to serve as the balance method of rigid rotor to handle. Inspect rotor very rigid body, and assume when the job, the runner shaft below effect of lopsided centrifugal force won't happen to be out of shape significantly. A lot of complex lopsided position of rigid rotor leave in these conditions for this, can simplify the department that it is force is lopsided will handle, can increase on two plane of aleatoric make choice of or subtract two equivalent at Ud1, make with the dynamic balancing force of Ud2 its are balanced. Rigid rotor dynamic balancing is low speed dynamic balancing commonly, the 1/3 that chooses the first critical rotate speed commonly is the following. Are 2 relevant term lopsided: ? Does Φ of herd of helmet of hey of take along sth to sb mire Yong does horsefly of  of  of large of flood dragon of  of Xi of  of  of happy event of orangutan of  Shi Ke mire  is remain of? of  of thorn of armour of persimmon branny establish lopsided U: ? Does Lv of cracking Li of Che of glue Xun  blow? of Suan of Mou Huang glue relatively lopsided E: ? Does  of yellow glue Xie slaughter  does persimmon Kang Mei fall be troubled by the  that carry  to throw ash of Nai of male of travel of a screen-like mountain peak of miscellaneous Shi of Χ of hey helmet herd G: of rate of Pi? equilibrium? A key to do sth does leg of Xiu of round yellow glue pay magpie of ń prize Yu: of processing of balance of? of some hoarse  ? Does  coffin Yong confuse department of Shi Ke orangutan to flinch  of pliable but strong of Yu of helmet   falls does Shi of υ of Υ of Xi  earth pay angry ㄒ of ㄏ pull up does  of the  that read grave slaughter  is persimmon branny does  of Kun of instrument of Zhi Ji  mire: of Man Jian of Tao idle? ? Embed round creek of Min of  of male  of Zhang of  of the bits that jump smile to be fond of Guan of Zhao Ba of fierce Scandium of  of the  that take an examination of  to shelter does Yang of Mei collect  knock at? of  of collect of  of pliable but strong half key: ? Embed Zhang of  of the bits that jump smile goblet of million of Scandium of Guang of Xiu of yellow glue of establish of hut of U of  of collect of Mei of A Chinese-style unlined garment of pen of Xing of  of Xun of glue of  of discharge of  of billows of ザ of predestined relationship of beard of  of  of languid of narrow of creek of Yin of Yang of Yi of male   basketry shelter Mei collect? is buried rotating. 3 rigid rotor are lopsided and G of rate of flat market of expression and precision requirement rotor also weighs prejudicial speed, it stated rotor is lopsided not only degree, and still expressed the concern between rotor quality eccentric throw and working rotate speed. G=e × W Mm/se -- relatively lopsided, mm; W -- the Rad/s of highest angular velocity that uses actually. If use rotate speed coming back to spend N(r/min) to replace, criterion: W2pn = En Mm/s 60 9 of =2pn/60G= E × .

The grade our country of 55 equilibriums rate adopted IS01940-1986 rigid rotor to balance quality requirement standard, cent of rate of mark brigadier equilibrium is 11 grade (see) issueing a list. Unit Mm/s balances G0 of degree order and degree.

4G1 G2.

5G6.

3Upper limit of rate of equilibrium of G16 G40 G100 G250 G630 G1600 G4000 is worth 0.

4 1 2.

5 6.

3 16 40 100 250 630 1600 4000 should decide according to using a situation about balancing the choice of degree order and degree. Undertake by lopsided the field test such as the vibration that cause, force, noise or lab test, balance degree certainly. Pass the unbalance that computation gets action to go up to bearing, the permission that achieves bearing the permission when limit is lopsided, determine disequilibrium rate thereby. Listed in JISBO905-1992 standard referenced subordinate list 1, show in the watch went out to form, size and rotate speed has representative rigid rotor differently, get by experience the commendation of order and degree of dynamic balancing degree is worth. Machine tool main shaft balances degree order and degree to be G1, G2.

The transmission spare parts of shafting of main shaft of 5 class machine tool balances degree order and degree to be G6.

3, G16. The machine with instrument of high speed a favourable turn coming back and bearing small tigidity chooses equilibrium rate to be worth normally small, choose great value instead. Additional, rotate of halfway quality and mechanical whole quality compare Xiaoshi.

The equilibrium extent value that chooses normally wants big. Allow to remain to beg a law lopsidedly to allow to remain 60 = 9 of × of Eper= G = G of relatively lopsided value.

55G Mm W 2pn N allows to remain Mm M of · of 103g of × of M of × of lopsided value Uper=eper -- the quality of rotor, kg. The 4 allocation that allow to remain to revise an aspect lopsidedly each are become rotor is only when a correction face, the permission of this rotor remains lopsided value, the permission that is this correction face remains lopsided value. To having I of two correction faces, the rotor of II, allow to remain I of admeasure of cent of lopsided value Uper, I revises an aspect twice allow to remain lopsided value UperI and UperII, the space that because rotor amends face and bearing to decorate,allocates a method is different can divide for 4 kinds of different situations. Component of main shaft of vertical machining center attributes the following situation commonly (1) seeing a picture. Graph 1S -- ; L of rotor quality center -- ; HI is apart from between bearing -- correction face I and span of rotor quality center leave; HII -- correction face II and span of rotor quality center leave; B=hI+hII -- from amend. When rotor satisfies following requirement: Inside the midsection that trisect leaves at bearing span in rotor quality. I of two correction faces, II clips two bearing in the side outside two bearing when: Does L Uper B B of · of L Uper B BUperII= HI of · of UperI= HII pursue does mechanic of 2 dynamic balancing make a principle pursue the principle of dynamic balancing craft of 5 rigid rotor does dynamic balancing machine comprise: by 3 bodies? С coerce branny? has soft bearing and hard bearing two kinds) , transmission part, measure reach computational share. Rotor outfit is on balancing machine, should as far as possible bearing is in in working journal, correction plane should be chosen in most stand by bearing to handle two end, in order to add corrective effect, also facilitate at the same time try add deserve to weigh. Rotor is lopsided the bearing vibration of generation or oscillatory force, by or so sensor changeover becomes corresponding and telegraphic name, after planar and detached circuit is handled, the course outputs signal, it parts to be concerned with the lopsided quantity on or so correction plane. The referenced and phasic generator that rotates with rotor coaxial at the same time issues parameter signal. Two kinds of afore-mentioned signal are defeated by a person to measure circuit, after amplifier of classics filter wave magnifies, detect a size of lopsided quantity on two correction plane and position. When the processing graph of 6 key has the runner shaft coming back of keyway 3 pairs to perhaps cooperate a component to have alone balance, must have a balance with half key. But have when equalizer lopsided to keyway when undertaking compensating a function, do not have this kind of limitation. The actual state institute that the good position of half key should install with the spare parts breaks up partial circumstance conform to to close. But the half key figure that uses actually, otherwise is equal evenly, also allow. The mark method of 7 blueprint rotates the equilibrium rate of component represents with the symbol. When the equilibrium rate that is necessary to make clear a spare parts on blueprint, consult graph 3 tag. CNC Milling