Gears im Bearing Seats: Heat-Treatment Distortion ej ri kijirãt eo emol an Precision

Bwebwenato

Juun 15, 2009

Tolerance ko ilo juon gear drawing rej finish-state tolerances: profile, lead, bore cylindricity, face runout. Ta eo ej kōmman bwe ren maroñ in dedelok ej joñan men ko rej bed wot ñan mōñā elikin an bwil — im an oktak ejjab alikar mokta jen furnace eo.

Gear Accuracy ej Accuracy Elikin Heat Treatment

Tolerance ko ilo gear ko im bearing seat ko rej bed ilo jekjek eo emōj an dedelok: profile tolerance, lead tolerance, bore cylindricity, face runout. Ta eo ej lukkun kōmman bebe elañe remaroñ in dāpij ej joñan an maroñ in mour ilo heat treatment ñan grinding. Ilo ien carburising im quenching, juon mõttan ej iion oktak in structural im thermal stress ilo ejja ien eo wot: wa ko redik rej eddeklok, mõttan ko redik rej diklok, mõttan ko rejjab jimwe rej rup. Ejelok ian men kein rej walok iman kijeek eo.

Juon bore eo elap an maroñ in kijenmij ejjab walok jen juon grinder eo emmanlok; ej walok jen juon wewein eo ear jelā ewi joñan an bore eo naaj etal mokta jen an kar mwijbar. Karōk in jerbal ñan gear ko ej kin menin kōtmene in distortion kobalok joñan an maroñ. Jikin wia ko remāletlet rej kalōk juon database in distortion kōn men ko, joñan wall-thickness ratio im loading pattern, innem kōllāik joñan ko mokta jen an kar bwil. Jikin wia ko ejelok data in remaroñ baj likit elaplok allowance im bōk grinding pass ko jet. Wōnan ej wōnmanlok, im elap an lõñ joñan ej mwijbar ilo carburised case eo im kōmman an pen.

Jilu un ko rej kōmman an oktak: Men ko, Geometry, Loading

Kein kajuon ej men ko. Ruo joñan bwil im molo in ejja 20CrMnTi grade eo wot emaron oktak ilo joñan an maroñ in oktak distortion kin 30 percent. Jerbal in ainikien ej ñan aikuj juon ripoot in band eo ej maroñ in pen jen mill eo im kãlet ñan tu-middle in band eo.

Kein karuo ej geometry: joñan depakpak in wall eo ejjab jimwe, juon keyway eo ejjab jimwe, hole ko rejjab jimwe ilo web eo aolep rej kōmman bwe en jab jimwe an bwil ilo ien kōmat. Men kein rej aikuj in walok ilo ien kōmmane pija eo — karōk eo ñan etale kōmmane emaron ukōt juon men eo ejjab jimwe ñan juon eo ejjab jimwe ak kobaik juon rib in jerbal. Kein kajilu ej ​​eddo: kein jerbal eo ej kōmman an quenchant flow field, joñan an molo ej oktak jen basket eo im tōrerein, im mõttan ko ilo ejja eddo eo wot remaroñ oktak ilo ial ko reoktak jen dron.

Grinding Allowance ej bōk jikin, jab kōtmene

Edik wōt joñan im jorrāān ko rejjab maroñ karreoiki, im likūt kilin ebōrōrō ālkin an kar m̧wijm̧wij. Elap im ien mōñā im wōnan ej wōnmanlok ilo ien eo carburised case eo ej maroñ in rup. Kōtlok eo ejimwe ej einlok wōt juon jorrāān eo kar kōtmene kake im jolok stock ko im juon menin kōjparok, im jorrāān eo kōtmene kake ej aikuj in itok jān joñan, jab jān juon bok in tōl.

Ial eo emman ej juon jerbal in kalikar: bōk joñoul mõttan ko ilo juon wōt ien, joñe joñan joñan mokta im elikin, bōk mean shift im standard deviation, innem likit joñan eo. Ilo kōmmane, sample kin batch im plot distribution eo ilo juon control chart; juon oktak ilo joñan eo ej melelen bwe furnace eo ak men eo ear oktak. Ejelok ian men kein rekãl, ak jejjo wōt jikin wia ko rej kōmmane ilo jimwe — eo ej lukkun mõttan eo an juon jerbal in kōmman kein jerbal ko rebin tata ñan bōk jikin.

Batch Consistency: Juon Mōttan Em̧m̧an Ejjab Kam̧ool Jabdewōt

Jekjek in jorrāān eo ilo gear ko ejjab juon wōt m̧ōttan eo ejjab maron̄ in bōk ak ej juon m̧ōttan eo ej jepļaaktok. Juon mõttan ej joñan ilo mid-tolerance, ak ilo juon batch juon jemlokin ej drift out — ekkã an joñan an thermal growth, tool wear im fixture wear. Elikin jiljino awa in jerbal, eddeklok in bwil im molo in spindle emaron tõpar joñoul microns, joñan an maroñ in jolok aolepen band eo.

Control ewōr jilu an laajrak: first-article confirmation, in-process sampling, last-article verification; bar juon thermal warm-up mokta jen an kōmmane im tool-life management ikijen an mwijbar joñan an to jen an rupe. Ñan jea ko rej bed ilo IT6, joñan eo ejjab alikar ej aikuj in bwine: juon oktak in ruo-degree ikõtan gauge im workpiece ej bwe ñan riiti juon bōd in juon-micron ilo juon bore eo lemñoul-millimeter.

Gear im Bearing Fit: Ruo Mōttan, Juon Apañ

joñan an jejjet ikōtaan juon gear shaft im bearing eo an ej kōmmane ibben don: shaft tolerance, bearing inner-ring tolerance, im roundness eo an erro jimor. Bōd eo ekkā an walok ej lale wōt joñan shaft eo im jab lale joñan an rup im joñan an rup. Ilo ejja jorrāān eo wōt, juon shaft eo ejjab em̧m̧an an round ej ukōt inner ring eo n̄an juon ellipse, bearing clearance ej oktak, im ainikien im m̧ōļo ej wōnm̧aanļo̧k wōt.

Mõttan kein einwot kein rej emmanlok air kōmmane jen juon wōt ri wia, ak ilo juon wōt datum system. Ilo an jebel jen ruo jikin wia ko, ej juon men eo ekkā an walok bwe kajjojo ren maroñ in etale im bwe en likjab aer kobaiktok. Juon kajitok ej jerbal emman ilo etale eo an ri wia ro: gear eo im bearing seat eo rej ke kōmmane ilo ejja clamping eo wot ilo ejja machine eo wot?

Etale: Juon CMM Ejjab maroñ Joñe Tooth Form

Gear accuracy ejjab maroñ in bōk jen juon CMM make. Juon CMM ej joñe joñan bore eo, face runout eo im keyway position eo, ak profile im lead tolerance ko rej aikuj in wōnm̧aanļo̧k wōt im probing ilo involute eo, meļeļein juon jikin jon̄e gear ak juon involute tester eo ejejjet. Elōñ quote ko rej kallimur bwe enaj lukkun lale CMM ñe form in ñii eo ejañin kar lukkun kamool.

Ej juon un eo ejelet kin aitwerõk ko: mõttan eo ej lelok CMM data im ej wõnmanlok wõt ñe ej deloñ ilo mweo. Un eo emaron in profile crowning, juon helix angle deviation ak accumulated pitch error, im ejelok ian men kein rej jijet ilo juon standard CMM routine.

Juon karōk in bōk eo emaron jerbal ej laajrak. Eoon eo moktata ej bōk juon report eo eobrak jen jikin joñe gear eo ej kwalok kin profile, lead, pitch im radial runout. Jerbal in kōmman ko rej kajerbal double-flank composite inspection einwot juon screen eo emōkaj, ippāñ sampling ko jen ien ko jet ilo jikin joñe eo. Double-flank machine ko rej dik wōnan im mõkaj ñan juon bukwi percent inspection, ak rej baj kwalok wōt juon bōd eo elap im rejjab maroñ ba ta element eo ej jako, innem wāween kein ruo rej aikuj jerbal ibben don.

Juon kakkōl kin joñan eo make: juon jikin joñan gear ej laplok an maroñ in kalikar im joñan bwil im molo jen juon CMM, im 20 degrees plus ak minus juon ej baseline eo. Lale joñan bwil im molo eo ilo ruum in metrology eo ilo ien audit ej kwalok ñan yuk elaplok jen nameplate eo an machine eo.

Emān kajjitōk ko ñan juon ri wia

Mokta, carburising im quenching ej ke kōmmane ilo mweo ak outsourced, im elañe outsourced ej ke heat treater eo ej bōk CQI-9? Kein karuo, emaron ke lelok melele ko kin joñan an oktak, ippāñ mean im standard deviation ko kar kobaiki kin men ko im joñan depakpak in wall eo? Kein kajilu, ewi wawein an kar kōmman grinding allowance, im emoj ke kōmmane juon validation run? Kein kajilu, ewi wawein an batch eo jejjet — ewōr ke SPC im tool-life management?

Ejelok ri wia ro rej uwaaki aolep men kein emen ilo erreo, ak ro rej uwaaki rej uwaak ilo jimwe, kinke rejelā bwe reban luuji jāān eo ilo scrap. Ñe kwoj kōnaan juon jikin kōmman kein jerbal ko ilo China ak juon jikin kōmman kein jerbal ko ilo China, kajerbal maroñ in kōmman bwe en bwil einwot filter eo moktata; ej kwalok ñan yuk elaplok jen juon laajrak in kein jerbal ko. Lale melele ko kin men ko rej wiakaki