Dacromet coated hexagonal cylindrical head screw: Bhaudhi diki rinotarisa hupenyu hwemidziyo mikuru, anti-corrosion uye isingadziviriri, uye hapana njodzi yakavanzika yehydrogen embrittlement.

2026-11-04

1. Nhanganyaya: Bhoti Inobata Michina Pamwe Chete

Famba nepakati chero muchina chitoro, robhoti sero, kana mhepo-turbine nacelle uye iwe unowana imwechete yekusimbisa: cylindrical-head screw ine hexagonal recess, yakasimbiswa nekiyi yeAllen. Izvi ndizvo hexagon socket head cap screw, yakamisikidzwa seDIN 912 uye ISO 4762. Ndiyo bhaudhi yakasarudzika yefa molds, maturusi emuchina, hydraulic manifolds, uye maassemblies akanyatso, nekuti inoisa yakakwira clamp mutoro muhamvuropu ine compact uye inogona kudzoserwa mucounterbore.

2. Chigadzirwa Tsanangudzo: Hexagon Socket Head Cap Screw

Iyo geometry yeiyi bhaudhi yakagadziridzwa kuti itange kurodha, kwete yekutaridzika kwekuyerera:

Cylindrical headine chiso chakati sandara chinotakura chisungiso pamusoro penzvimbo yakazara denderedzwa.
Yemukati hexagon socket(metric mhiri-mafurati kubva pa2.5 mm kusvika 36 mm), ichitumira torque kuburikidza nezviso zvitanhatu zvine kam-out shoma.
Yakazara-fomu metric thread(yakakomba kana kuti yakanaka pachiyero cheISO 261), yakakungurutswa pane kucheka kuti zviyo zvirambe zvichiyerera uye hupenyu hwekuneta huri nani.
Property makirasi 8.8, 10.9, uye 12.9, inovhara masimba ekusimba kubva ku800 kusvika ku1,220 MPa.

Thread	Head Dia. (dk)	Kureba Musoro (k)	Hex Socket (s)	Kirasi 8.8 Tensile	Kirasi 12.9 Tensile	Kureba Kwakafanana
M5	8.5 mm	5.0 mm	4 mm	800 MPa	1,220 MPa	10–60 mm
M6	10.0 mm	6.0 mm	5 mm	800 MPa	1,220 MPa	12–80 mm
M8	13.0 mm	8.0 mm	6 mm	800 MPa	1,220 MPa	16–100 mm
M10	16.0 mm	10.0 mm	8 mm	800 MPa	1,220 MPa	20–120 mm
M12	18.0 mm	12.0 mm	10 mm	800 MPa	1,220 MPa	25–150 mm
M16	24.0 mm	16.0 mm	14 mm	800 MPa	1,220 MPa	30-200 mm

Iyo yemusoro-kune-shinda reshiyo inobata dhizaini yekugadzira: cylindrical musoro wakakura unopa kuvharwa kwakafara, kwakaderera-kunetsekana kwepasi kuti kusungirire, nepo yakadzika socket recess ndiyo yakanyanya kuvharira-yakakosha nzvimbo yescuru yese - ndipo panotangira ngura kurwisa uye apo firimu rakatetepa kana risina kukwana rinoita kuti bhaudhi ribate.

Dacromet yakavharwa hexagonal cylindrical musoro sikuruu

3. Kuiswa: Torque, Preload, uye Coating Interaction

Bhaudhi risingaite ngura haribatsiri kana mubatanidzwa ukadambuka. Tafura 2 inopa assembly torque yekirasi 8.8 uye 10.9 socket head cap screws ane Dacromet coating (μ ≈ 0.14).

Thread	Kirasi 8.8 Torque	Kirasi 8.8 Preload	Kirasi 10.9 Torque	Kirasi 10.9 Preload
M5	6.5 Nm	4.0 kN	9.0 N·m	5.6 kN
M6	11,5 Nm	5.7 kN	16.0 N m	8.0 kN
M8	28.0 N·m	10.4 kN	39.0 N m	14.6 kN
M10	55.0 N·m	16.5 kN	78.0 N m	23.1 kN
M12	96.0 N m	24.0 kN	135 Nm	33.6 kN
M16	240 N·m	45.0 kN	335 Nm	63.0 kN

Shandisa kiyi chaiyo.Kiyi yeAllen yakasakara kana kushoma inokuvadza socket uye inofumura simbi isina chinhu - nzvimbo chaiyo inotangira ngura.
Remekedza counterbore.Musoro unogara pachiso chayo chakakwana; chamfered kana kukuvadzwa counterbore inoderedza nzvimbo yekusangana uye inogona kutsemura firimu rekuvhara pasi pemutoro.
Usasanganisa coating systemspajoint imwechete pasina kutarisazve torque. A Dacromet screw mu plain nut ine kukweshana kwakasiyana pane sikuruu yakavharwa mu nati yakavharwa.
Re-torque mushure mekugadzirisapamagaskets akapfava kana dzimba dzepurasitiki; iyo yakaoma firimu haina kukambaira, asi iyo clamped zvinhu inogona.

4. Mhedziso

Iyo Dacromet-yakavharwa hexagon socket head cap screw chikamu chidiki chinosarudza hupenyu hwesevhisi yegungano rakakura. Musoro wayo wecylindrical uye yemukati hexagon inoburitsa iyo clamp mutoro wemazuva ano anodiwa nemichina; zinc-aluminum flake coating yayo inopa mashandiro ekudzivirira ngura ayo kunze, mugungwa, uye zvekufambisa zvinoda sevhisi - pasina hydrogen embrittlement, pasina tambo yekudzvanya zvakare, uye pasina chirango chinokuvadza chesimbi isina tsvina. Rondedzera chivakwa nemazvo, torque nemazvo, uye bhaudhi rinoburitsa pendi pamushini wawakabata pamwechete.

Hauna. Next.