LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
Bourdon-Tube Pressure Gauge
The heart of a dial pressure gauge is the Bourdon tube: a metal tube of oval section bent into a C and sealed at its free end. The greater the pressure, the farther the free tip moves, but only about 0.125–0.25 in (3–6 mm) across the whole range. A geared movement, built much like clockwork, turns that small movement into the sweep of a pointer, usually over 270° of dial. The tube metal must take a spring temper; phosphor bronze is used for most gauges for air, light oil or water, and beryllium copper for high pressure. The tube's wall thickness and the radius of its curve set the pressure range.
Lengra kominn
Factory process
Leiðbeiningar
1
1
Roll the C
Roll the C
Pass the tubing over a lubricated steel mandrel and between two grooved, powered rollers. One roller grips the end and bends the inside radius while the other presses from outside; the grooves keep the tube from flattening.
Efni fyrir þetta skref:
Fosfórbronsrör1 as requiredNauðsynleg verkfæri:
Bourdon-rörabeygjuvél2
2
Cut and heat treat
Cut and heat treat
As the roller keeps turning, a saw blade on it cuts the tube to length. Heat treat the tubes in ovens to give them their spring temper.
Nauðsynleg verkfæri:
Hitameðferðarofn3
3
Machine the socket
Machine the socket
Turn, drill, mill and thread the socket from bar stock in one cycle on a machining centre. One end is threaded to screw into the pressure source.
Efni fyrir þetta skref:
Kringlótt messingstöng1 as requiredNauðsynleg verkfæri:
CNC-vinnslustöð4
4
Join tube and socket
Join tube and socket
Solder, braze or weld the open end of the tube to the socket, locating the free end precisely, and seal the free end the same way. Fit an endpiece to the tip; its small hole links the tip to the movement.
Nauðsynleg verkfæri:
Harðlóðunarbrennari5
5
Fit movement, dial and pointer
Fit movement, dial and pointer
Mount the movement, the dial and the pointer onto the socket as a group.
Efni fyrir þetta skref:
Gangverk þrýstimælis1 stykki
Mælaskífa og vísir1 stykki6
6
Calibrate and case
Calibrate and case
Connect the assembly to a pressure source alongside a master gauge of known accuracy and adjust it until it reads the same; 2% is a common accuracy, finer grades 1, 0.5 or 0.25%. Then fit the case and lens.
Efni fyrir þetta skref:
Mælishús og gler1 stykkiNauðsynleg verkfæri:
Kvörðunarbekkur með viðmiðunarmæliEfni
5- 1 as requiredStaðgengill
- 1 as requiredStaðgengill
- 1 stykkiStaðgengill
- 1 stykkiStaðgengill
- 1 stykkiStaðgengill
Nauðsynleg verkfæri
5- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
- Staðgengill
Þessi teikning býr til
Tengd Blueprint
Þessi blueprint deila þekkingu — tækni, efni eða meginreglur
CC0 opinbert ríki
Þessi teikning er gefin út undir CC0. Þér er frjálst að afrita, breyta, dreifa og nota þetta verk í hvaða tilgangi sem er, án þess að biðja um leyfi.
Studdu smiðinn með því að kaupa vörur í gegnum teikningu hans þar sem hann fær þóknun smiða sem seljendur ákvarða, eða búðu til nýja endurskoðun á þessari teikningu og tengdu hana sem tengingu í þinni eigin teikningu til að deila tekjum.