The method of main shaft dynamic balancing and application
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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