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Anglicky v odbornch pedmtech"Support of teaching technical subjects in EnglishTutorial: Engineering technology

Topic: Screw connections

Prepared by : Ing. Jaroslav Hbl

Projekt Anglicky v odbornch pedmtech, CZ.1.07/1.3.09/04.0002je spolufinancovn Evropskm socilnm fondem a sttnm rozpotem esk republiky.

SCREW / BOLT CONNECTIONSScrew & Bolt connections belong to demountable connections with shaped contactScrews are most often used machine components. They are common structural components, their usage is large and thanks to screws, nuts, washersthey are standardized and that is why they can be changed.

BASIC KINDS OF BOLT CONNECTIONS By nut and bolt

By embeded bolt By studs

NUT BOLTSConnected components are forced to each other by bolt head and nut.

STUDSConnected components are forced to each other by nut and thread screw component, spring washer prevents screw loosening.

EMBEDED SCREWSConnected components are forced to each other by conical head and threaded screw component.

SCREW CONNECTIONS SECURITYScrew connection can be loosen during operation consequently with printing of bearing surfaces or by the influence of dynamic stress and its function can be lost.That is why screw connection is secured.Security can be made by shape or power contact with secure element, alternatively by material contact.

SHAPED LOCKING OF BOLT CONNECTIONS

by split pin, b) by split pin with top nut, c) by washer with peen, d) by washer with latch, e) security by wire, f) by Km nut with MB washer, g) by cutting screw top to connected component

POWER SECURITY OF BOLT COMPONENTSby spring washer, b) by harden nut, c) by 2-part nut, d) by nut with polyamid ring

SCREW CONNECTIONS SECURITY BY MATERIAL CONTACTa) and b) by welding, by soldering, by painting

Stroje a zazen I, J. Doleek, P. Gajdo, V. Novk Strojnictv I, J. Doleek, Z. HoloubekStrojnictv II, J. Doleek, Z. HoloubekModern strojrenstv, Josef Dilinger a kolektivTranslation:www.seznam.czwww.slovnik.czJANATA, Petr. Handy slovnk technick anglicko-esk a esko-anglick. Plze: Nakladatelstv Fraus, 2000. ISBN 80-7238-075-3Lingea LEXIKON 5, Technick slovnk anglicko-esk a esko-anglick. 2010.

Literature

Draw and describe bolt connection.

Draw and describe at least 2 ways of shaped bolt security.

Draw and describe at least 2 ways of power bolt security.