Hom ntawm threads siv nyob rau hauv cov neeg kho tshuab

Carving yog florid helix nrog ib tug tsis tu ncua suab pov tseg rau hauv lub conical los yog cylindrical nto. Nws yog lub ntsiab keeb txuas ob hom fasteners, raws li zoo raws li ib tug ntsia hlau tig thiab toothed helical iav. Basic tsis threads rau niaj hnub fasteners txhais nyob rau hauv GOST 11708-82: no xov suab ntawm nyob ib sab convolutions, cov txheej thiab puab diameters ntawm lub khawm ris lub caij, kab los sib ntsib kaum sab xis ntawm lub xov.

Hom ntawm threads rau cov fasteners raug muab faib mus rau hauv:

• domestic - yog thov mus rau cov noob txiv, lub tes tsho anchors, couplings, yeeb nkab;
• lwm - yog muab tso rau hauv screws, screws, screws, bolts, studs.

Cov nram qab no hom ntawm threads rau cov coj qhua:

• Metric - profile nyob rau hauv daim ntawv ntawm ib tug equilateral daim duab peb sab (tej zaum nrog me me, medium thiab loj loj cov kauj ruam);
• nti - voos los yog Trapezoidal zoo lawm;
• Metric conical - muaj ib voos profile;
• puag ncig - kab los sib ntsib projection yeej zoo lawm;
• Trapezoidal - sab saum toj Trapezoidal protrusion;
• Resistant - asymmetrical Trapezoidal profile;
• Modular - Trapezoidal profile;
• conical raj thiab cylindrical (muaj hauv daim ntawv ntawm ib tug ceskaum daim duab peb sab sib npaug nti loj (los yog ploskosrezannoy) peaks thiab troughs kauj);
• conical nti - ploskosrezannoy profile nrog lub apex ntawm lub voos zoo.

Muaj tseem ib co hom threads, zoo li ib tug square thiab lub. Lawv thov kom fasteners lathes rau ib tug neeg kos duab. Cov threads tsis muab ib tug high degree ntawm cov neeg, thiaj li tsis tshua muaj siv. Lawv tsis muaj qhua.

Rau hnub tim, rau lub engineering daim ntawv thov yooj yim txheej thiab puab xov metric yog suav hais tias. Nyob rau hauv lub drawings, nws yog denoted los ntawm ib tug capital tsab ntawv "M" qhia cov txheej inch nyob rau hauv millimeters. Yeeb Nkab xov hom yog siv los txuas ntau cov kav dej. Lawv nominal txoj kab uas hla yog cov nrog txoj kab uas hla ntawm cov yeeb nkab, sab nraum uas yog threaded. Nyob rau hauv lub drawings, nws yog denoted los ntawm ib tug capital tsab ntawv «G» hais nrog lub puab kab uas hla ntawm cov yeeb nkab nyob rau hauv nti.

Cov ntsiab xov ntau thiab tsawg pab ntawm tag nrho cov hom yog siv cov ntaub ntawv. Lawv muaj peev xwm yuav nrhiav tau nyob rau hauv tej phau ntawv kho tsheb. siv cov ntaub ntawv rau metric xov piav nyob rau hauv kom meej raws li GOST 9150-81, 8724-81, thiab 24705-81. Yeeb Nkab cylindrical xov ntau thiab tsawg pab yog teev nyob rau hauv GOST 6357-81.

Ib tug ntawm cov fasteners nrog metric xov yog ib tug ntsia liaj qhov rooj. Nws yog ib tug hlau pas nrig nrog ib lub taub hau ntawm ib kawg. Raws qhov ntev ntawm tus pas nrig ua ntawv thov mus rau lub helical zawj. Purpose bolts - kev twb kev txuas ntawm ntau qhov chaw ntawm mechanisms thiab designs los ntawm txoj kev ceev. Cov ntsia liaj qhov rooj lub taub hau yog hexagon zoo li tus, thiab (daim card, ib nrab-round, pob tw, BS, davhlau ya nyob twg).

Cov nram qab no hom ntawm bolts raws li tau npaj:

• Rooj tog - yog siv los txuas cov khoom nyob rau hauv cov rooj tog siv;
• engineering - siv nyob rau hauv coj mus muag sector;
• plowshare - tsim rau pib machinery nyob rau hauv lub ua liaj ua teb sector;
• tsheb - siv rau compound ntau yam hlau thiab guardrails.