Mechanical Spline Tes Tsho PM Sintered Part

Khoom Taw Qhia

Khoom zoo

Txoj cai ntawm kev ua

Nyob rau hauv tib neeg lub neej, feem ntau cov sawv daws yuav yog rectangular spline bushings thiab involute spline bushings, cov uas rectangular spline shafts yog dav siv, feem ntau yog siv nyob rau hauv aircraft, tsheb, tsheb laij teb, tshuab cuab yeej tsim, thiab lwm yam machinery tsav configuration. Dab tsi yog lub hauv paus ntsiab lus ntawm spline ncej?

1. Muaj nuj nqi: Nws yog ib hom kev sib kis ntawm cov neeg kho tshuab. Cov yuam sij ua tsov rog, tus yuam sij semicircular thiab oblique tseem ceeb muaj qhov ua haujlwm zoo ib yam, thiab lawv txhua tus kis tau tus neeg kho tshuab torque;

2. Structure: Nws muaj txoj hauv kev longitudinal rau saum npoo ntawm ncej, thiab lub rotating ib lub tes tsho ntawm lub ncej kuj muaj ib tug sib xws keyway, uas yuav ua kom rotating synchronously nrog lub ncej. Thaum rotating, qee qhov tuaj yeem xaub qhov ntev ntawm lub ncej, xws li gearbox hloov lub zog.

3. Cov piv txwv ntawm daim ntawv thov: nyob rau hauv brakes thiab steering mechanisms. Kuj tseem muaj lub ntsej muag telescopic, uas yog tsim los ntawm cov raj sab hauv thiab sab nrauv, lub raj sab nrauv muaj cov hniav sab hauv, thiab lub raj sab hauv muaj cov hniav sab nraud, uas yog lub tes tsho ua ke. Thaum siv, nws tuaj yeem nthuav dav thiab cog lus nyob rau hauv qhov ntev kev taw qhia thaum kis torque rotational.

4. Khoom siv: 40Cr

5. Kev kho cua sov. Quenching Nto hardness HRC45--50.

Lub involute spline ncej yog siv rau cov loads loj, siab nruab nrab qhov yuav tsum tau, thiab kev sib txuas loj. Nws cov yam ntxwv: tus hniav profile yog involute, thiab muaj ib tug radial quab yuam ntawm cov hniav thaum nws yog loaded, uas yuav ua tau raws li ib tug tsis siv neeg centering muaj nuj nqi, kom lub zog ntawm txhua tus hniav yog nruab nrab, lub zog yog siab thiab lub neej yog. ntev, cov txheej txheem txheej txheem yog tib yam li cov iav, thiab nws yog ib qho yooj yim kom tau txais ntau dua precision thiab interchangeability.

Txheej Txheem Kev Ntsuam Xyuas ntawm Spline Ncej Qhov Chaw

1.1 Spline ncej taw qhia

Spline ncej yog siv rau txhua tus ncej rau lub ncej thiab cov kabmob haum, cov xov feem ntau yog siv rau kev sib txuas thiab kev sib txuas, tus yuam sij thiab spline yog siv rau kev sib txuas ntawm cov ncej thiab qhov sib kis ntawm tus ncej, rau kev sib kis. ntawm torque, thiab qee zaum Cov lus qhia ntawm qhov kis tau tus mob ntawm tus ncej ua yeeb yam.

Rectangular spline ncej tuaj yeem ua haujlwm nrog ntau cov hniav, kev sib dhos zoo, kev taw qhia zoo, cov hauv paus hniav ntiav, kev nyuaj siab, me me tsis muaj zog ntawm ncej thiab hub lub zog, kev ua haujlwm yooj yim, thiab siv dav hauv kev tsim khoom.

Ntawm lawv, lub kaum sab xis spline yog qhov nruab nrab ntawm cov splines raws li lub teb chaws tus qauv, thiab nws cov specification tuaj yeem tau txais raws li N * d * D * B=6 tom qab saib lub rooj (Table 10-7 nyob rau hauv phau ntawv "Interchangeability thiab Measurement Technology") *34. 2 * 40 * 10, cim nrog sab nraud spline specification thiab qhov loj me yog 6 * 34.2f7 * 40f7 * 10d9 GB / T1144-2001.

1.2 Tshooj qauv tsom xam

Raws li kev soj ntsuam ntawm daim duab schematic ntawm ib feem: cov qauv ntawm cov ntxaiv ib feem muaj cov yam ntxwv hauv qab no: los ntawm cov duab, lub workpiece yog spline nrog ib tug stepped qauv. Txij li qhov piv ntawm qhov ntev mus rau txoj kab uas hla L / D <, 5, lub workpiece belongs rau cov ntxaiv nruj. Nyob rau hauv cov nqe lus ntawm cov txheej txheem deg, cov txheej txheem tseem ceeb muaj xws li sab nrauv cylindrical nto, spline, ob txoj kev tseem ceeb, thiab sab hauv threaded qhov, uas yog cov txheej txheem raug thiab yooj yim rau txheej txheem.

1.3 Txheej txheem tsom xam ntawm qhov chaw

Cov kev xav ntawm qhov chaw yog qhov tseeb thiab ua tiav, thiab qhov ntev, kev kam rau siab thiab kev xav tau ua tiav. Txawm li cas los xij, qhov yuav tsum tau muaj ntawm Ra0.8μm rau sab nraud cylindrical nto ntawm spline Φ40f7mm thiab sab nraud cylindrical nto ntawm txoj cai kawg Φ35k6mm yog me ntsis siab.

Ib feem yog ib feem, thiab tag nrho nws qhov chaw yuav tsum tau machined, thiab machining raug thiab nto roughness ntawm txhua qhov chaw tsis yooj yim kom tau. Lub hauv paus tsim radial ntawm spline ncej yog lub hauv paus centerline, thiab lub hauv paus tsim axial yog sab laug kawg dav hlau ntawm spline txheej cylindrical nto Φ40f7mm. Lub hauv paus tsim radial ntawm lub spline yog sab nraud cylindrical nto ntawm nruab nrab 40f7mm. Lub hauv paus tsim radial ntawm M12 threaded qhov yog lub hauv paus centerline, thiab lub hauv paus tsim axial yog sab laug kawg dav hlau ntawm sab nrauv cylindrical nto ntawm spline φ40f7nm. Lub hauv paus tsim M5 radial yog sab laug kawg ntawm lub cylindrical nto ntawm spline Φ40f7mm, thiab lub hauv paus tsim axial yog ntawm kaum ntawm 30 degree nrog spline. Zuag qhia tag nrho, kev ua haujlwm ntawm ntu no yog qhov zoo.

1.3.1 Kev cai lij choj

Qhov no belongs rau lub ncej ncej, thiab lub ntsiab nto yog tsuas yog tsim ntawm lub voj voog, chamfer, nyem zawj, keyway, cov xov sab hauv thiab sab nraud spline, thiab lwm yam. Lub rooj sib txoos nto roughness ntawm txhua ncej yog siab heev, nrog Ra ncav { {0}}.8/μm, uas yog IT6, IT7 qib; thiab qhov tseeb qhov tseeb thiab qhov tseeb ntawm txoj haujlwm tseem ceeb (tseem ceeb rau kev ua haujlwm ntawm lub voj voog sab nrauv), kev ua haujlwm ntawm 35mm nyob rau hauv txoj cai kawg ntawm lub ncej (pem saum npoo B) thiab 40m nyob rau hauv txoj kab uas hla loj ntawm spline (hauv paus nto A) yog qhov tseem ceeb tshwj xeeb, Lawv muaj qhov yuav tsum tau ua kom sib npaug thiab sib luag nrog rau sab ntawm lub qhov hauv qab thiab qhov dav dav, thiab cov kev xav tau sib luag ntawm cov hniav ntawm sab nraud spline thiab lub hauv paus nto A.

Ntawm lawv, qhov tseeb qhov tseeb ntawm txhua lub tog raj kheej yog siab, thiab qhov roughness ntawm lub cylindrical los ua ke nto kuj siab, nrog Ra mus txog 0.8 pum. Lub Ra ntawm qhov zawj undercut thiab sab ntawm tus hniav spline yog mus txog 1.6μm; sab ntawm ob txoj kev tseem ceeb yog mus txog 1.6μm; tus so yog qis dua thiab Ra tsuas yog xav tau mus txog 12.5μm. Cov roughnesses saum npoo no yooj yim dua kom tau txais, thiab tuaj yeem tau txais los ntawm kev ntxhib tig Fine tig - zoo tig thiab milling ua tau raws li qhov yuav tsum tau ua. Chamfering, filleting thiab deburring tag nrho ua tau raws li qhov yuav tsum tau ua.

1.3.2 Kev soj ntsuam ntawm qhov kev xav tau

(1) Dimensional raug

Cov ncej ntawm txoj cai kawg yog 35 hli nyob rau hauv qhov chaw, lub voj voog sab nrauv yog 40m nyob rau hauv qhov chaw, lub hauv paus lub voj voog ntawm spline yog 34.2 hli, qhov tseem ceeb hniav dav yog 10 hli, qhov dav dav dav yog 8 hli, qhov kev ncua deb ntawm Hauv qab ntawm txoj kev tseem ceeb thiab lub voj voog sab nrauv yog 4.5 (30.5) mm, thiab tag nrho qhov ntev ntawm lub spline ncej yog 191 m, qhov kev ncua deb ntawm sab xis kawg lub ntsej muag thiab sab xis kawg ntawm spline yog 30 m.

(2) Qhov tseeb ntawm qhov chaw

① Lub taper thiab tawm-ntawm-roundness ntawm 40f7 nyob rau hauv tag nrho ntev tsis ntau tshaj li ib nrab ntawm txoj kab uas hla kam rau ua.

② Qhov sib npaug ntawm qhov yuam kev ntawm lub spline thiab asymmetry ntawm tus khub tseem ceeb Φ40f7 tsis ntau dua o.03.

③ Qhov tsis sib luag ntawm sab kev sib dhos ntawm 40f7 axis ntawm spline tsis ntau dua o.04.

④ Lub radial runout ntawm nruab nrab 35k6 mus rau nruab nrab 40f7 tsis ntau dua 0.04.

⑤ Lub asymmetry ntawm ob 8H8 keyways ntawm 35 k6 axis tsis ntau dua 0.05.

(3) Nto roughness

Qhov saum npoo roughness ntawm 40f7 thiab 35k6 lub voj voog sab nrauv ntawm lub voj voog sab nrauv yog Ra=0.8μm, qhov roughness ntawm sab saum npoo ntawm cov hniav spline thiab sab laug thiab sab xis kawg ntawm lub spline yog Ra{{ 6}}.6m, sab saum npoo ntawm ob qhov tseem ceeb grooves thiab cov hniav spline Qhov nto roughness ntawm lub hauv paus lub voj voog yog Ra=3.2μm, thiab qhov seem ntawm qhov chaw yog Ra=12.5μm .

Hlau Txhaj Moulding txheej txheem

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