Machining Hydraulic Valve Bodies: Siling Fes, Krɔs Ɔl ɛn Prɛshɔn Tɛst

Atikul

Jun 15, 2008

Wan blɔk we dɛn mek wit mɛtal, tri prɛsishɔn sistɛm dɛn we de liv insay am: flatnɛs na di mawntin fes, silindrisiti ɛn kɔaksialiti na di bor, rɔfnɛs na di silin fes. Dɛn mashin sikyud de fɛt insɛf, na dat mek kot fɔ di sem drɔin de span wan faktɔ we na fayv.

Wetin Mek Valv Bɔdi Dɛn At: Tri Prɛsishɔn Sistɛm dɛn na Wan Pat

Wan haydrolik valv bɔdi tan lɛk blɔk we gɛt ol dɛn insay. In prɔsis tri prɛsishɔn sistɛm dɛn de kɔ-ɛgzist insay wan pat: flatnɛs na di mawntin fes, silindrisiti ɛn kɔaksialiti na di spɔl bor, rɔfnɛs na di silin fes dɛn. Dɛn mashin ɔda de fɛt insɛf. Bore fɔs ɛn afta dat mil, ɛn klem fɔs de distɔrj di bore rawndnɛs; mil fɔs ɛn afta dat bore, ɛn di sɛkɔn klem de tilt di fes.

Na dat mek di kot fɔ di sem drɔin kin kɔmɔt frɔm tɛn to ɔndrɛd yunit dɛn pan mɔni. Di difrɛns nɔto mashin akkuracy bɔt if dɛn dɔn tink bɔt di prɔses routin: ɔmɔs ɔpreshɔn fit insay wan klem, aw di datum de transfa, usay ɔt tritmɛnt de sidɔm. Wan shɔp we nɔ tink bɔt am de kot smɔl, i lɔs di mɔni pan skrap, ɛn pas di lɔs bak as dilɛy ɔ prayz inkris.

Sial Fes: Raf Na di Simptom, Waviness Na di Prɔblɛm

Di fes dɛn we dɛn kin sidɔm nɔ kin pwɛl bikɔs dɛn nɔ kin smol; dɛn kin fel bikɔs dɛn nɔ flat inof. Wan Ra 0.4 fes wit wevnɛs stil de gi wan O-ring wan lik pat, we wan Ra 1.6 fes wit gud wevnɛs kɔntrol de sial rili pan lɔw prɛshɔn. So di krayteria fɔ aksept nid Ra ɛn waviness, ɔ flatness, togɛda. Ra nɔmɔ nɔ kɔmplit.

Na di mashin sayd di rispɔns na fɔ kɔntrol fid fɔ ɛni tut ɛn tul runout di tɛm we dɛn de finish mil so dat rɛgyula waviness nɔ go fɔm, ɛn fɔ ad lapping ɔ honing usay nid de. Na day kastin blank, kɔnfɔm se mashin alawɛns na ivin fɔs: nɔ ivin alawɛns de mek di kɔt fɔs de chenj, ɛn dat fluktueshɔn de sho dairekt as wɛvnɛs.

Krɔs Ɔl: Deburring Na Usay Dɛn De Disid Yield

Valv bɔdi dɛn gɛt bor dɛn we de kɔba dɛnsɛf, ɛn we dɛn de drɔ, i de lɛf wan bɔr we dɛn dɔn rɔl na ɛni intasekshɔn. Di bur nɔ de si, i kin was lɔs afta dɛn dɔn gɛda am, ɛn i kin lod bitwin spul ɛn sliv, we kin mek i stik ɔ lik insay. wan mininful shea fכ nyu valv dεm we de fεl fכ aktyuet pan di tεst bεnch de tray bak to kכros-hol bכr dεm.

Di diburring prɔses dipen pan ol dayamita ɛn intasekshɔn angle: mɛkanikal diburring wit wan dediket tul, abrasive flow fɔ smɔl ol ɛn kɔmpleks intasekshɔn, ɔ ilɛktrɔkɛmikal diburring fɔ stebul volyum. Ɔl tri de wok, wit rili difrɛn kɔst ɛn kɔnsistɛns. We yu kwalifay fɔ wan saplay i fayn fɔ aks dairekt aw dɛn de debur di krɔs ol dɛn ɛn aw dɛn de verify di rizɔlt. Wan spɔlayt we nɔ ebul fɔ tɔk bɔt di verifyeshɔn go mɔs dɔn nɔ kɔntrol am.

Prɛshɔn Tɛst: Di Mɛtɔd Impɔtant Mɔ Pas di Prɛshɔn

Valv bɔdi dɛn na pruf ɛn lik tɛst bifo dɛn sɛn dɛn, bɔt wetin prɛshɔn, fɔ aw lɔng ɛn jɔj aw dɛn kin lɛf am bɔku tɛm. Di kɔmɔn mistek na fɔ stet tɛst prɛshɔn we nɔ gɛt hold tɛm ɔ akseptɛns trɛshɔld, so di saplay de tɛst fɔ tati sɛkɔn ɛn di kɔstɔma aksept pas fayv minit. Nɔbɔdi nɔ de rɔng ɛn natin nɔ de we de mach.

Wan kɔmplit spɛsifikɛshɔn de tɔk bɔt di midiɔm (wata ɔ gas), di tɛst prɛshɔn (we dɛn kin rayt 1.5 tɛm), di tɛm we dɛn kin ol frɔm di volyum ɛn alawable dɛkayshɔn rit, di akseptɛns trɛshɔld, ɛn di dreyn ɛn rɔst-prɛvenshɔn stɛp dɛn afta dat. Fɔ tɛst gas nid ɔda tin dɛn bak we sef: kɔmprɛs gas kin kip fa fawe mɔ ɛnaji, so if i brok, i kin rili denja pas we dɛn de du haydrolik tɛst.

Casting or Machining: Wetin Mek Wan Sɔs Win

Valv blank kin kɔmɔt frɔm day kastin ɔ graviti kastin, wit mashin we dɛn kin du ɔdasay. Split akɔdin to tu saplay, di argumɛnt na prɛdiktibɛl: di kasta se alawɛns mit di drɔin, di mashinist se nɔ ivin alawɛns lɛf blak skin. Di pɔsin we bay di tin kin tek di kɔst, i kin tek di blak skin ɔ i kin skrap di lɔt.

So valv bɔdi dɛn kin fayn fɔ wan spɔlayt we de du ɔl tu di kastin ɛn mashin, usay alawɛns, datum, ɔt tritmɛnt ɛn dibɔr de klos insay wan prɔses dɔkyumɛnt ɛn wan pati gɛt di prɔblɛm. Na dat mek bak, we dɛn de evalyu di mɛkanikal pat saplay dɛn, di ebul fɔ bil in yon tul ɛn prodyuz in yon blank de se mɔ pas wan kɔnt fɔ mashin sɛnta dɛn.

Klin: Di Rikwaymɛnt We Nɔ De Ɛva Rich di Drawing

Klin na di rikwaymɛnt we nɔ kin rich di drɔin yet de disayd bɔku pan di warranty kɔst. Sand we dɛn lɛf insay wan kas kaviti, chips frɔm krɔs-hol deburring, aluminiɔm swaf nɔ blo aut bifo asembli — ɔl dis de rɔn wit di ɔyl wans di sistɛm dɔn rɔn, ɛn wɛr di spɔl ɛn di pɔmp in pɔt plet. Di industri de ɛksprɛs di target as ISO 4406 patikyula kɔnt ɔ NAS 1638 klas, bɔt bɔku pipul dɛn we de bay kin rayt nɔmɔ se di intɛriɔ fɔ klin, we nɔ de spɛsifa natin.

Wan ɛgzibit spɛsifikɛshɔn de split klin to 4 tin dɛn: di we aw dɛn de tek sampul, ilɛksɛf na fɔ flush ɔ fɔ pul am; di inschrumɛnt, wan patikyula kɔnta; di akseptɛns klas, fɔ ɛgzampul ISO 4406 18/16/13; ɛn di protɛkshɔn bifo dɛn pak am, we min plɔg, dɛsikɛnt ɛn wan dɛbul bag. Wit ɔl di 4 raytin, wan saplay kin sɛlf-chɛk ɛn akseptans gɛt baysis.

Na di mashin sayd tri step dɛn de we de mach: ay-prɛshɔn flush afta dɛn dɔn deburring, ɔltrasɔnik klin bifo dɛn asɛmbli, ɛn boreskɔp sampling bifo di las inspekshɔn. Di boreskop stɛp na di wan we dɛn kin skip mɔ, ɛn na di wangren we fɔ si di tin dɛn we lɛf na di rut fɔ wan krɔs ol. Fɔ aks fɔ si di bɔreskɔp rɛkɔd dɛn we dɛn de du ɔdit kin mek pɔsin biliv pas fɔ rid tɛn pej dɛn pan di sistɛm dɔkyumentri.

Aw fɔ Aks fɔ Valv Bɔdi Kɔt

Ridyus to siks layn inkwyuizhɔ: blank sɔs ɛn alawɛns standad; prɔses routin ɛn datum; Ra ɛn waviness target pan sial fes; kros-hol deburring mεtכd εn vεrifikεshכn; ful prɛshɔn-tɛst paramita dɛn; ɛn kapasiti ɛn ritm we dɛn de du ramp-ap. Aks dɛn siks de ɛn di spred bitwin kot dɛn kin bi sɔntin we pɔsin kin ɛksplen pas fɔ mek pɔsin gɛs.

Wan tin we wi fɔ tek tɛm wit: valv bɔdi na pat we nɔ de wok wan pɔynt, ɛn layn we dɛn stɔp kin kɔst fa fawe pas di pat. Biyond di praymari saplay i fayn fɔ divɛlɔp bak-ap saplay in paralel as mɔlti-sɔs saplay arenjmɛnt wit in yon aprɔval fayl, nɔto as nem pan kɔntinjɛns list, wit ɔl tu we de wok frɔm di sem drɔin rivishɔn ɛn akseptans standad. Insay haydrolik, imejensi bak-ap kapasiti nɔto ɔda sɔs opshɔn; na inshɔrans pan prodakshɔn kɔntinyu. Luk di ditel dɛn bɔt di prɔdak we di wan we mek am