ALUMINUM GLOSSARY - Airoldi Metalli

More documents

Recommendations

Info

Blank A piece of metal cut or formed to regular or irregular shape for subsequent processing such as by forming, bending, or drawing. The piece of sheet stock cut out by blanking die. It will subsequently be drawn into a cup or end shell. Blending The machining of the transition in the bearing length from long to short. Blister A raised area on the surface of an extruded product due to subsurface gas expansion during extrusion or thermal treatment. Blistering A defect in the paint film appearing as bubbles, usually caused by the expansion of air, solvent vapor, or moisture trapped beneath the film. Blocking The use of graphite blocks to support the emerging extrusion as it exits the die. Bloom A semi-finished hot rolled product, rectangular or square in cross section, produced on a blooming mill. Blow Hole A blister that has ruptured and may produce a void. See also Blister . Bolster (die block) A tool , or reinforcing part, which supports the backer -- which, in turn, supports an extruding die against the pressure of extrusion. Bow Longitudinal curvature of rod, bar, profiles (shapes), and tube. Bow is measured after allowing the weight of the extrusion to minimize the deviation. Bow can be caused by a non-uniform extrusion rate across the cross section resulting in one portion of the extrusion being longer than the other or non-uniform contraction during quenching. Bow, Lateral Deviation from straight of a longitudinal edge.
Bow, Longitudinal Curvature in the case of sheet or plate in the rolling direction, along the length of an extrusion. Bow, Transverse Curvature across the rolling direction of sheet or plate, across the width of an extrusion. Breakaway Point Is usually formed by the step where die undercut starts and bearing surface ends and is also where the extrusion leaves the bearing. Breakout Pressure The initial pressure required to start metal flow through the extrusion die. Breakthrough The point in time when the billet emerges from the exit side of the die as an extruded profile. Bridge In extrusion: the part of an extrusion bridge die that supports a void-forming mandrel. During extrusion, the metal divides and flows around the bridge, reuniting as it is extruded through the die orifice. The resulting weld line can be detected upon microscopic examination, but the extrusion appears functionally and visually seamless. Bridge Type Die A die having a stationary core or mandrel which is held in place by core supports or webs (bridge) bolted to the back of the die. The die contains a weld chamber so that when the billet is pushed the metal divides to flow around the core supports and welds together in the welding chamber before passing through the die. See Porthole Die and Spider Die . Bridge dies normally have unenclosed ports which protrude into the container liner. Bridging (Webs Network) The network of support webs which hold in place the internal surface forming portion of the mandrel, created when the ports are machined into the mandrel. Bridging (Design Purpose) Is used to reduce pressure on critical tongue areas of a semi-hollow or hollow die. Bright Dipping
Page 1 and 2: ALUMINUM GLOSSARY AMS Abbreviation
Page 3: Cut-away portion of die beginning a
Page 7 and 8: The welding of two sections that bu
Page 9 and 10: The smallest circle that will compl
Page 11 and 12: Contour That portion of the outline
Page 13 and 14: Deep Drawing Forming a deeply reces
Page 15 and 16: The extrusion press component locat
Page 17 and 18: tolerance. Edge, Broken (Cracked) E
Page 19 and 20: Emissivity The relative ability of
Page 21 and 22: The velocity or rate at which an ex
Page 23 and 24: conventional round billet is forced
Page 25 and 26: Frictional Heat That heat imparted
Page 27 and 28: Commonly used as a shop term to den
Page 29 and 30: A part formed in a confining die fr
Page 31 and 32: The initial adjustable and removabl
Page 33 and 34: The chamber of an extrusion press i
Page 35 and 36: Mill finish is the finish obtained
Page 37 and 38: Orange Peel (1) Surface roughening
Page 39 and 40: Pick-Off The transfer of portions o
Page 41 and 42: the purpose of producing a gloss or
Page 43 and 44: Profile, Class 2 Hollow Extruded An
Page 45 and 46: An extruded profile whose cross-sec
Page 47 and 48: Rib An elongated projection on a sh
Page 49 and 50: Seam Defect An unbonded fold or lap
Page 51 and 52: Sheet, Clad Composite sheet having
Page 53 and 54: Slug A metal blank for forging or i
Page 55 and 56:
An auxiliary tool sometimes attache
Page 57 and 58:
A bright superficial band or elonga
Page 59 and 60:
A structural finish is a standard f
Page 61 and 62:
The parts of an extrusion press tha
Page 63 and 64:
A tube of nominally uniform wall th
Page 65 and 66:
The action of relieving entrapped a
Page 67:
Wire produced by hot extruding. Wir
show all

ALUMINUM GLOSSARY - Airoldi Metalli

Create successful ePaper yourself

Delete template?

Save as template?