Gia ɛn Bia Sit: Ɔt-Tritmɛnt Distɔshɔn Na di Rial Ɛnimi fɔ Prɛsishɔn

Atikul

Jun 15, 2009

Di tolerans pan wan gia drɔin na finish-stet tolerans: profayl, lid, bore silindrisiti, fes runout. Wetin de disayd if dɛn kin mit na ɔmɔs matirial de lɛf fɔ grind afta ɔt tritmɛnt — ɛn distɔrshɔn nɔ de si bifo di ɔfna.

Gia Akkuracy Na Akkuracy Afta Hɛt Tritmɛnt

Tolerances pan gia ɛn bia sit dɛn de spɛsifa insay di finish stet: profayl tolerance, lid tolerance, bore silindrisiti, fes runout. Wetin rili disayd if dɛn kin ol dɛn wan ya na aw bɔku alawɛns de sev frɔm ɔt tritmɛnt fɔ grind. di tεm we dεn de kכbכrayz εn kεnch, wan pat de כnda strכkchכral transfכmeshכn εn tεmral strεs di sem tεm: tin wכl dεm de gro, tik tik sεkshכn dεm de shrink, asimεtrik pat dεm de bεnd. Nɔn pan am nɔ de bifo di ɔfna.

Wan ay tolɛreshɔn bore nɔ de prodyuz bay bɛtɛ grinda; i de prodyuz bay wan prכsεs we bin no aw fa di bore go muv bifo dεn grכn am. Prɔses dizayn fɔ gia dɛn na dat mek distɔshɔn prɛdikshɔn plus alawɛns alɔkeshɔn. Ɛkspiriɛns shɔp dɛn bil wan distɔrshɔn database bay matirial, di wɔl-tiknɛs rɛsɛshɔn ɛn lod patɛn, dɔn dɛn kɔmpɛns di prɛ-ɔt-tritmɛnt dimɛnshɔn dɛn in rivas. Shop dɛn we nɔ gɛt da data de kin jɔs lɛf mɔ alawɛns ɛn tek ɛkstra grindin pas. Kɔst de go ɔp, ɛn tumɔs alawɛns de grind tru di kabɔrayz kes ɛn drɔp di hadnɛs.

Tri Sɔs fɔ Distɔrshɔn: Matirial, Jɔmɛtri, Lod

Di fɔs wan na matirial. tu hεt dεm we gεt di sem 20CrMnTi gred kin difrεnt in hardenability band width inof fכ chenj distorshכn bay tati pasεnt. Saund praktis na fɔ nid fɔ gɛt hardenability band ripɔt frɔm di mil ɛn pik to di lɔwa-midul pan di band.

Di sɛkɔn wan na jɔyometri: nɔ ivin tik na di wɔl, wan ɔfset kiway, asimɛtrik ol dɛn na di wɛb ɔl de prodyuz nɔ ivin kol we dɛn de kwɛnch. dis dεm fכ rayz na di droin stej — disayn fכ mεnεjmεnt rivyu kin כltεm kכnvכlt wan asimεtrik fכm to wan simetrik wan כ ad wan prכsεs rib. Di tɔd wan na lod: di fiks de disayd di kwɛnchant flɔ fil, kol rit difrɛn bitwin baskɛt sɛnt ɛn ed, ɛn pat dɛn na di sem lod kin distɔrj insay ɔpɔzit dairekshɔn.

Grinding Allowance Na Kalkul, Nɔ Gɛs

Tu smɔl alawɛns ɛn distɔrshɔn nɔ kin klin, lɛf blak skin afta yu dɔn grind. Tumɔs ɛn grindin tɛm ɛn kɔst de klaym we di kabɔrayz kes de risk fɔ kɔt tru. Kɔrɛkt alawɛns ikwal to di distɔshɔn we dɛn de ɛkspɛkt plus fɔ pul di stok plus wan sefty factor, ɛn di distɔshɔn we dɛn de ɛkspɛkt fɔ kɔmɔt frɔm mɛzhɔmɛnt, nɔto frɔm wan hanbuk.

Di prɛktikal rod na prɔses validɛshɔn rɔn: lod tɛn pat insay wan saykl, mɛzhɔ di saiz distribyushɔn bifo ɛn afta, deriv min shift ɛn standad dɛvyayshɔn, dɔn sɛt di alawɛns. Insay prodakshɔn, sampul bay batch ɛn plot di distribyushɔn pan wan kɔntrol chɔt; wan shift na di min min se di ɔfna ɔ di matirial dɔn chenj. Nɔn pan dis nɔto nyu tin, bɔt na smɔl shɔp dɛn nɔmɔ de du am fayn — we na di pat pan kɔstɔm mashin savis we at fɔ riples.

Batch Consistency: Wan Gud Pat De Pruv Natin

Di karakta fayl pan gia nɔto wan ɔt-ɔf-tolɛreshɔn pat bɔt batch dispershɔn. wan pat de mכsu na mid-tolerance, yet across wan batch wan εnd de drift aut — כltεm di sכm fכ tεmral growth, tul wear εn fixture wear. afta fכ awa we dεn de kכntinyu fכ mashin, di spindl tεmral growth kin rich tεn maykron, we inof fכ kכnsכm di ol tכlerans bכnd.

Kontrol gɛt tri layers: fɔs-atikul kɔnfɔmeshɔn, in-prɔses sampling, las-atikul verifyeshɔn; plεs tεmכl wכm-ap bifo prodakshכn εn tul-layf mεnejmεnt bay we yu kכt lεngth pas bay we i brok. Fɔ bia sit dɛn we dɛn ol to IT6, dɛn fɔ kɔnt di mɛzhɔmɛnt ɔnsatayniti sɛf: tu digri difrɛns bitwin gej ɛn wokpies na inf fɔ rid wan maykrɔn mistek pan fifti milimita bor.

Gia ɛn Bia Fit: Tu Pat, Wan Prɔblɛm

Di fit bitwin wan gia shaft ɛn in bia na in dɛn kin disayd togɛda: di shaft tolɛreshɔn, di bia insay-ring tolɛreshɔn, ɛn di rawnd we dɛn ɔl tu. Di kɔmɔn mistek na fɔ wach di shaft dimɛnshɔn nɔmɔ ɛn nɔ pe atɛnshɔn to di rawnd ɛn di sɔfa rɔf. Na di sem intafɛreshɔn, wan shaft we nɔ gɛt bɛtɛ rawndnɛs de difɔm di insay ring to wan ɛlips, di bia kliarens chenj, ɛn di nɔys ɛn tɛmpracha rayz de fala.

Na dat mek pat dɛn lɛk dɛn wan ya na wan spɔlayt kin mek dɛn bɛtɛ wit dɛn mashin, ɔ at ɔl insay wan datum sistɛm. We dɛn sheb am bitwin tu shɔp dɛn, i rili kɔmɔn fɔ mek ɛni wan pan dɛn pas inspekshɔn ɛn di asɛmbli nɔ wok. Wan dairekt kwɛshɔn de wok fayn na di saplay evalueshɔn: dɛn mek di gia ɛn di bia sit na di sem klem pan di sem mashin?

Inspekshɔn: Wan CMM Nɔ Ebul fɔ Mɛzhɔ Tut Fɔm

Gia akkuracy nɔ go ebul fɔ kɛr bay CMM nɔmɔ. Wan CMM de mɛzhɔ di bore saiz, fes runout ɛn kiway pozishɔn, bɔt profayl ɛn lid tolɛreshɔn dɛn nid fɔ kɔntinyu fɔ probing along di involute, we min se wan gia mɛzhɔmɛnt sɛnta ɔ wan dediket involute tɛsta. Plɛnti kot dɛn prɔmis ful CMM inspekshɔn we di tut fɔm nɔ ɛva rili verify.

Dat na wan famili sɔs fɔ akseptans dispyut: di pat de pas CMM data ɛn stil de whine we i go insay di haus. Di kɔz kin bi profayl krawn, ɛliks angle dɛvyayshɔn ɔ akumulet pitch mistek, ɛn nɔbɔdi pan dɛn nɔ sidɔm na standad CMM rutin.

Wan wokable akseptans plan de layt. Di fɔs atikul gɛt ful ripɔt frɔm di gia mɛzhɔmɛnt sɛnta we de kɔba profayl, lid, pitch ɛn raydial rɔnaut. Prodakshɔn rɔn dɛn de yuz dabl-flank kɔmpɔzit inspekshɔn as fast skrin, wit periodik sampling bak na di mɛzhɔmɛnt sɛnta. Dabl-flank mashin dɛn nɔ dia ɛn dɛn kin kwik fɔ wan ɔndrɛd pasɛnt inspekshɔn, bɔt dɛn jɔs de sho wan kɔmpɔzit mistek ɛn dɛn nɔ kin ebul fɔ tɔk us ɛlimɛnt dɔn kɔmɔt, so di tu we dɛn fɔ wok togɛda.

Wan kɔtyushɔn bɔt di mɛzhɔmɛnt sɛf: wan gia mɛzhɔmɛnt sɛnta kin sɛnsitiv mɔ to kalibreshɔn ɛn tɛmpracha pas wan CMM, ɛn twɛnti digri plus ɔ mayns wan na di beslayn. We yu luk di tɛmpracha lɔg na di mɛtrɔlɔji rum we dɛn de du ɔdit, dat kin tɛl yu mɔ pas di mashin in nem plet.

Fo Kwɛstyɔn dɛn fɔ Pɔsin we De Bay

Fɔs, dɛn kin du kabɔrayzin ɛn kwɛnch insay os ɔ na ɔda pipul dɛn kin du am, ɛn if dɛn kin du am to ɔda pipul dɛn, di ɔt trita kin ol CQI-9? Sɛkɔn, dɛn kin gi mɛzhɔ distorshɔn data, wit min ɛn standad dɛvyayshɔn we dɛn grup bay matirial ɛn di wɔl tik? Tɔd, aw dɛn de sɛt grindin alawɛns, ɛn dɛn dɔn du validɛshɔn rɔn? Fɔs, aw dɛn de ashu batch kɔnsistɛns — SPC ɛn tul-layf manejmɛnt de?

Na smɔl saplay dɛn nɔmɔ kin ansa ɔl di 4 klin wan, bɔt di wan dɛn we kin ansa kin kot rial wan, bikɔs dɛn no se dɛn nɔ go lɔs di mɔni pan skrap. We yu de shɔtlist wan Chaina prɛsishɔn mashin faktri ɔ wan Chaynish CNC pat manifakta, yuz ɔt-tritmɛnt kapabiliti as di fɔs filta; i de tɛl yu fa fawe pas wan ikwipmɛnt list.