A. Zinc gami mutuwa casting sassa Overview

Zinc gami mutuwa gyare-gyare ne wani nau'i na zinc gami ta hanyar mutuwa gyare-gyare na'ura mutuwa gyare-gyare da aka samar da sassa, tare da high machining daidaito, kananan yankan, karamin nauyi, inji karfi da sauran halaye, saboda haka yadu amfani a cikin kayan daki, motoci, jirgin ruwa, kayan gini, kayan haɗi, inji, sinadarai, kayan wasa da sauran fannoni.

Idan aka kwatanta da sauran kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe kashe

1, na farko shi ne zinc lantarki damar ne sosai mummunan, ne biyu jinsi karfe, a cikin acid ko alkali da sauƙin samun sinadarai narkewa. A cikin mafita da ke ƙunshe da ƙarfe ions mai kyau, hydrogen da ƙarfe ions suna da sauƙin maye gurbin su.

2, na biyu, zinc gami mutuwa casting tsari, saboda sanyaya lokacin da workpiece farfajiyar zafin jiki ba daidai ba, zinc gami farfajiyar da sauƙi samar da kayan aiki polarization lamarin, farfajiyar gida wadataccen zinc ko wadataccen aluminum. Alkali mai ƙarfi ya sa wani ɓangare mai arziki na aluminum ya narke da farko, acid mai ƙarfi ya sa wani ɓangare mai arziki na zinc ya narke da farko, rashin nauyin farfajiyar ba daidai ba ne, ya sa farfajiyar ta samar da ramuka masu iska, matsaloli ko ma kumfa da sauransu.

　　2. Zinc gami mutuwa casting sassa tsari

Polishing - dubawa - Suspension - zafi ko sanyi degreasing - ultrasonic kawar da waxes - ultrasonic kawar da man fetur - cathode lantarki kawar da man fetur - m acid kunnawa - pre-rufi

　　3. Main tsari bayani

1, ƙwanƙwasawa

① farkon polishing

Farko polishing kuma aka kira polishing. Lokacin polishing ƙarfi ya zama daidai, aikin ya zama mai ƙarfi, ƙarfin ba zai iya zama mai girma ba. Its tushen aiki sigogi: polishing karafa juyawa gudun 1200 ~ 1400 r / min, polishing karafa diamita ≤250 mm, lu'u-ulu'u yashi grain size 220 ~ 250 mata, polishing kayan ne rawaya polishing kwalliya.

Farko polishing ne a shirya don rough polishing, manufar shi ne kawar da zinc gami mutuwa gyare-gyare ƙofar, burrs, tashi gefe da sauran lahani, farko inganta tsabta.

② ƙarfin polishing

The rough polishing ne a kan tushen farko jefa, kara inganta tsabtace da surface na zinc mutuwa casting sassa, samar da rabin madubi sakamako. Tsarin sigogi kamar yadda ke ƙasa: polishing ƙafafun juyawa gudun 1400 ~ 1600 r / min, polishing ƙafafun diamita ≤300mm, polishing kayan ne rawaya polishing kwalliya.

② Tsarin polishing

Fine polishing ne na ƙarshe polishing tsari. Ta hanyar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar ƙwaƙwalwar Tsarin sigogin shine: madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin madaidaicin mada

2, zafi ko sanyi degreasing

Ta hanyar zafi ko sanyi degreasing, sa zinc gami farfajiyar waxe moisturizes da narkewa yayin da wani ɓangare narkewa, inganta ultrasonic kawar da waxe inganci. Hot degreasing formula: STPP 20 ~ 30 g / L, Na2CO3 10 ~ 15 g / L, Na3PO4 5 ~ 8 g / L, ba tare da ruwa sodium polysilicate 3 ~ 5 g / L, hadaddun non-ionic irin surfactant 5 ~ 7 g / L, anion irin surfactant 1 ~ 2 g / L, keto ko ether daidaitaccen adadin, pH darajar ≤11. 5, 55 ~ 65 ° C, 3 ~ 5 min.

Hot degreasing ne wani nau'i na musamman tsakanin sunadarai kawar da man fetur da kuma kawar da waxes, cewa shi ne na musamman, saboda shi ne kafin ultrasonic kawar da waxes, aikinsa shi ne kamar yadda zai yiwu ya sa waxes moisturizes, swelling, wannan aikin ne ta hanyar alkali ruwa, non-ionic irin active da anionic irin surface active da sauransu a cikin yanayin zafi mai dacewa. Ko ultrasound zai iya cire waxes daga farfajiyar workpiece da sauri da tsabta ya dogara da tasirin zafi ko sanyi. Ruwan ingancin wutar lantarki da aka tsara don zafi degreasing ne kasa da 50μΩ / cm.

Amfani da kayan aiki sanyi degreasing, domin zinc gami mutuwa casting, ya kamata ya zama mafi kyau. Saboda ba wai kawai ba ya buƙatar dumama, har ma da narkewar wax moisturizing tasiri bayyananne, babu mummunan lalata ga workpieces. Tsarin tsari kamar haka:

Dimethylene 7. 5 mL/ L , Dichloromethane 47. 5 mL/ L , Haɗin nonionic surfactant 15 ~ 20 mL / L, anionic surfactant 5 ~ 7 mL / L, keto ko ether daidaitacce, zafin jiki na ɗaki, mintuna 5.

3, Ultrasonic kawar da waxes

① lokacin da ultrasonic kawar da waxes, ikon na unit ingantaccen girman

Yawancin zane ne mafi dacewa a 8 W / L. Lokacin da kasa da 8 W / L, kawar da wax saurin jinkiri, ya shafi samar da ci gaba; Lokacin da ya fi 8 W / L, zinc gami mutuwa casting aiki ci gaba da mintuna 5 a karkashin 65 ~ 70 ° C, zai haifar da mafi bayyane hasara nauyi, a cikin wadataccen aluminum fasalin aluminum fifiko narkewa, zai haifar da liquor, har ma kumfa.

② ingancin ruwa da aka yi amfani da ultrasonic kawar da wax

Shirya ultrasonic wax kawar da ruwa idan an yi amfani da mummunan ingancin ruwa, da yawa karfe anions a cikin ruwa ba zai iya zama cikakken hadaddun da wax kawar da ruwa, karfe anions iya shiga cikin wax ko kasancewa a kan workpiece farfajiyar, rage da mummunan lantarki caji tsakanin wax da wax tsakanin wax da workpiece, da kuma wutar lantarki repellence tsakanin wax da workpiece, kawar da wax sakamakon da yawa rage. Wannan shine muhimmin dalilin da ya sa mai kyawun ruwan kawar da wax ya yi amfani da shi a wani masana'antu yana da kyau, yayin da aka yi la'akari da shi a wani masana'antu ba shi da kyau, ko mai kyau na ɗan lokaci yayin da ba shi da kyau a wani lokaci. Yawancin masu samar da kayayyaki ba su tunatar da abokan ciniki ba, wannan babban kuskure ne. A gefe guda, lokacin da ingancin ruwa ya ƙunshi yawa kamar Cu + 2, ana samar da kumfa a saman kayan aiki saboda maye gurbin. An tabbatar da cewa ingancin ruwa da aka zaɓa a ƙasa da 50 μΩ / cm.

② Zaɓin kawar da ruwan wax

Ga zinc gami mutuwa casting sassa, zabin kawar da wax ruwa farko ka'ida ne pH darajar. Gabaɗaya, mahimmancin amfani da ƙirar pH na ƙirar zinc shine 10. Wato, lokacin da kowane nau'in ruwan kawar da wax ya kammala daidai da umarninsa, ƙimar pH na mafita ≤10, in ba haka ba, a ƙarƙashin takamaiman yanayin kawar da wax yana da sauƙin samar da asarar nauyi, har ma da duhu da baƙar fata, irin wannan ruwan kawar da wax ba za a iya amfani da shi ba; Ka'ida ta biyu, ba shakka, shi ne cire wax sakamakon, a karkashin umarnin bukatun, cire wax sauri, sauki tsabtace cire wax ruwa ya dace da zaɓi; Ka'ida ta uku ita ce yawan amfani da rayuwa.

4, Ultrasonic kawar da man fetur

Ultrasonic kawar da man fetur yana kama da ultrasonic kawar da wax, amma abubuwan da ke cikin mai kawar da man fetur sun fi sauki fiye da abubuwan da ke cikin ruwan kawar da wax. Tsarin tsari kamar haka:

(1) Na3PO4 20 ~ 30 g / L, Na2CO3 10 ~ 15 g / L, AEO29 0. 6 g / L, LAS 0. 3 g / L, 55 ~ 65 ° C, 2 ~ 3min.

(2) STPP 10 g/ L ,Na3PO4 5～8 g/ L , 0.5 g / L mai dauke da sulfur, LAS ≤1 g / L, 55 ~ 65 ° C, 2 ~ 3 min.

Abubuwan biyu da aka ambata a sama suna kama da abubuwan da yawa na kayan aiki. Adding trisodium phosphate ne domin wanke silicate film da aka haɗa da surface na workpiece lokacin da ultrasonic kawar da wax. Kayan da aka yi amfani da su a cikin tsari ne sama da darajar 1, don rage yawan ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin ƙarancin

5, cathode electrolysis fitar da man fetur

Cathode electrolysis removal man fetur ne mai mahimmanci tsari ga zinc gami mutuwa casting sassa.

Tsarin tsari kamar haka:

(1) STPP 20 g / L, Na2CO3 25 ~ 30 g / L, AOS0. 3～0. 5 g / L, LAS 0. 4～0. 5 g / L, pH 值≤11. 5 , 2 ~ 5 A / dm2, 40 ~ 50 ° C, 0. 5～1. 0 daga

(2) Na3PO4 20 g / L, K2SO4 15 ~ 20 g / L, Na2CO3 8 ~ 10 g / L, AEO27 0. 4～0. 7 g / L, pH 值≤11. 5 , 5 A / dm2, 室温, 0. 5～1. 0 daga

Wasu bayanai kuma sun ambaci amfani da sauran kayan aiki kamar jerin Flat Plus a matsayin kayan aikin kayan aikin kayan aikin kayan aikin kayan aikin kayan aikin kayan aikin kayan aikin kayan aikin kayan aikin kayan aikin kayan aikin kayan aikin kayan aikin. Saboda Flat Plus jerin surface active, shi low zafin jiki aiki ne mafi rauni, a lokacin da aka ƙara da yawa detachment zai iya zama da wuya, idan aka kawo shi a cikin activation ruwa, zai haifar da furanni ko napkins kamar lalacewa.

Dole ne a jaddada cewa ingancin ruwa na man fetur na cathode yana da mahimmanci. A lokacin da ingancin ruwa ba shi da kyau, wasu karfe cations za su kasance a cikin nau'i na hydroxide, haɗuwa da workpiece farfajiyar haifar da liquor, har ma da wasu karfe cations za su iya kai tsaye a workpiece farfajiyar fitarwa ajiye a workpiece farfajiyar, haifar da roughness ko ma kumfa da sauransu. Kuma Cl-ion a cikin ruwa dole ne a sarrafa shi a matakin da yake da ƙarancin ƙarancin, in ba haka ba, anode bakin karfe na karfe zai haifar da lalata kuma ya kawo ƙarancin ƙarfe a cikin man fetur na cathode, wanda ke haifar da mummunar man fetur. Wannan tsari yana shawarar yin amfani da ruwa deionized. Cathode electrolysis kawar da man fetur yanzu yawa ba ya kamata ya zama da yawa, lokaci ba zai iya da tsawo, in ba haka ba, cathode analysis hydrogen yawa, kodayake kawar da man fetur sakamako mai kyau, amma zai kasance wani ɓangare na hydrogen shiga cikin zinc gami substrate, haifar da baya tsari kumfa.

6, karfi acid kunnawa

Ga zinc alloy mutuwa casting sassa, ba mu ba da shawarar yin amfani da hydrochloric acid, sulfuric acid ko hydrofluoric acid don kunnawa, saboda waɗannan acids ne inorganic karfi acid, su ne karfi lalata ga workpieces, arziki zinc phased hydrogen ne mai tsanani, da surface dense layer zai lalace sosai. Zaɓin karfi acid kunnawa, workpiece surface adhesiveness canji kananan, babu kumfa, suture da sauran lahani. Tsarin tsari kamar haka:

(1) Oxalic acid 10 g / L, tartaric acid 5 g / L, sulfuric acid 3 ~ 5 mL / L, daidaitaccen adadin lalacewa, zafin jiki na ɗaki, 3 ~ 10 s.

(2) C6H8O7 40 ~ 50 g / L, H3BO3 daidaitacce, NH4HF daidaitacce, mai lalacewa 0. 2～0. 3 g/ L , zafin jiki na dakin, 5 ~ 10 s.