Buttress thread
Translation- Buttress thread
Buttress thread form refers to one of several
screw thread profiles."Buttress thread" in machinery
In machinery, "buttress thread" is a thread form designed to handle extremely high axial thrust in one direction. (The resistance to axial thrust in the other direction is lower, being somewhat less than that of V-threads.) The load-bearing thread face is perpendicular to the screw axis. [cite book
last = Barnwell
first = George W.
title = The new encyclopedia of machine shop practice
publisher = Wm. H. Wise & Co.
date = 1941
pages = 163] or at a slight slant (typically 7 degrees) [US patent reference | number=5127784 | y=1992 | m=07 | d=07 | inventor=David Eslinger | title=Fatigue-resistent buttress thread] The other face is slanted at about 45 degrees. The resulting thread form has the same low friction properties assquare thread but at about twice the strength. In German it is called a "saw thread" "(Sägegewinde)" because the threadform resembles saw teeth.One application in which the average person may see buttress threads is on a tube of toothpaste with a threaded cap. The threads to hold the cap on are sometimes made in buttress form, because this form best resists the force that tends toward blowing the cap off if the tube is squeezed at inadvertent times (such as while being packed inside a traveler's suitcase).
Buttress threads have often been used in the construction of
artillery , because the thread can withstand the axial load placed on it when the powder charge explodes."Buttress thread" in oil field tubing
In oil field tubing, "buttress thread" is a pipe thread form designed to provide a tight hydraulic seal. The thread form is similar to that of
Acme thread [US patent reference | number=6893057 | y=2005 | m=05 | d=17 | inventor=M. Edward Evans | title=Threaded pipe connection] [ [http://www.glossary.oilfield.slb.com/Display.cfm?Term=buttress%20thread Oil field glossary entry for "buttress thread"] ] the force is transmitted almost parallel to the axis and thread is about the same strength as standard v threads.ee also
*
Screw thread
*Acme thread form
*Square thread form References
Wikimedia Foundation. 2010.
Look at other dictionaries:
buttress thread — трапецеидальная резьба; упорная резьба … Англо-русский словарь нефтегазовой промышленности
buttress thread casing — обсадные труба с трапециевидной резьбой … Большой англо-русский и русско-английский словарь
buttress thread tool joint — замковое соединение с трапецеидальной резьбой (для труб большого диаметра) … Большой англо-русский и русско-английский словарь
buttress thread casing — обсадная труба с трапециевидной резьбой * * * обсадные труба с трапециевидной резьбой … Англо-русский словарь нефтегазовой промышленности
buttress thread tool joint — замковое соединение с трапецеидальной резьбой (для труб большого диаметра) … Англо-русский словарь нефтегазовой промышленности
Screw thread — Internal and external threads illustrated using a common nut and bolt. The screw and nut pair can be used to convert torque into linear force. As the screw (or bolt) is rotated, the screw moves along its axis through the fixed nut, or the non… … Wikipedia
ISO metric screw thread — The ISO metric screw threads are the world wide most commonly used type of general purpose screw thread.[1] They were one of the first international standards agreed when the International Organization for Standardization was set up in… … Wikipedia
butt. — [buttress thread] трапецеидальная резьба … Англо-русский словарь нефтегазовой промышленности
Djebel Ressas — Jebel Ressas Djebel Ressas in cloud cover, as viewed from the northwest Elevation … Wikipedia
Glossary of botanical terms — Many of the terms used in Wikipedia glossaries (often most) are already defined and explained within Wikipedia itself. However, lists like the following indicate where new articles need to be written and are also useful for looking up and… … Wikipedia