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Peen Tong
Peen may refer to: * Part of the head of a hammer, as in a ball-peen hammer (also ''ball-pein'', or ''ball and pein'') * Peening, the changing of a metal's properties by impacting its surface ** Shot peening, bombarding metal parts with small spherical media ** Laser peening, focusing lasers on the surface of a metal part * Peening (scythe blade), peening a scythe or sickle blade as a step in sharpening it * Steel Belt: Shot Peening, an innovative remedial solution for deformed steel belts *A slang term for the penis See also *Peene (other) * Pein Pein is a surname. Notable people with the surname include: * Anton Pein (born 1967), Austrian darts player * Friedrich Pein (1915–1975), Austrian sniper *Malcolm Pein Malcolm Bernard Pein (born 14 August 1960) is a British chess player, chess ... * '' Peen tong'', a Chinese brown sugar and sugar candy {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ball-peen Hammer
A ball-peen or ball pein hammer, also known as a machinist's hammer, is a type of peening hammer used in metalworking. It has two heads, one flat and the other, called the peen, rounded. It is distinguished from a cross-peen hammer, diagonal-peen hammer, point-peen hammer, or chisel-peen hammer by having a hemispherical peen. Uses Besides for peening (surface hardening by impact), the ball-peen hammer is useful for many tasks, such as striking punches and chisels (usually performed with the flat face of the hammer). The peening face is useful for rounding off edges of metal pins and fasteners, such as rivets. The ball face of the hammer can also be used to make gaskets for mating surfaces. A suitable gasket material is held over the surface where a corresponding gasket is desired, and the operator will lightly tap around the edges of the mating surface to perforate the gasket material. Variants Variants include the straight-peen, diagonal-peen, and cross-peen hammer. These hamme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peening
In metallurgy, peening is the process of working a metal's surface to improve its material properties, usually by mechanical means, such as hammer blows, by blasting with shot (shot peening), or focusing light (laser peening). Peening is normally a cold work process, with laser peening being a notable exception. It tends to expand the surface of the cold metal, thereby inducing compressive stresses or relieving tensile stresses already present. Peening can also encourage strain hardening of the surface metal. Residual stress Plastic deformation in solids, Plastic deformation from peening induces a Residual stress, residual compressive stress in a peened surface, along with tensile stress in the interior. This stress state resembles the one seen in toughened glass, and is useful for similar reasons. Surface compressive stresses confer resistance to metal fatigue (material), fatigue and to some forms of corrosion, since cracks will not grow in a compressive environment. The bene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shot Peening
Shot peening is a cold working process used to produce a compressive residual stress layer and modify the mechanical properties of metals and composites. It entails striking a surface with shot (round metallic, glass, or ceramic particles) with force sufficient to create plastic deformation."Shot Peening," ''Tool and Manufacturing Engineers Handbook'' (TMEH), Volume 3, Society of Manufacturing Engineers, 1985 In machining, shot peening is used to strengthen and relieve stress in components like steel automobile crankshafts and connecting rods. In architecture it provides a muted finish to metal. Shot peening is similar mechanically to sandblasting, though its purpose is not to remove material, but rather it employs the mechanism of plasticity to achieve its goal, with each particle functioning as a ball-peen hammer. Details Peening a surface spreads it plastically, causing changes in the mechanical properties of the surface. Its main application is to avoid the propagation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laser Peening
Laser peening (LP), or laser shock peening (LSP), is a surface engineering process used to impart beneficial residual stresses in materials. The deep, high-magnitude compressive residual stresses induced by laser peening increase the resistance of materials to surface-related failures, such as fatigue, fretting fatigue and stress corrosion cracking. Laser shock peening can also be used to strengthen thin sections, harden surfaces, shape or straighten parts (known as laser peen forming), break up hard materials, compact powdered metals and for other applications where high pressure, short duration shock waves offer desirable processing results. History Discovery and development (1960s) Initial scientific discoveries towards modern day laser peening began in the early 1960s as pulsed laser technology began to proliferate across the globe. In an early investigation of the laser interaction with materials by Gurgen Askaryan and E.M. Moroz, they documented pressure measurements on a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scythe
A scythe ( ) is an agricultural hand tool for mowing grass or harvesting crops. It is historically used to cut down or reap edible grains, before the process of threshing. The scythe has been largely replaced by horse-drawn and then tractor machinery, but is still used in some areas of Europe and Asia. Reapers are bladed machines that automate the cutting of the scythe, and sometimes subsequent steps in preparing the grain or the straw or hay. The word "scythe" derives from Old English ''siðe''. In Middle English and later, it was usually spelt ''sithe'' or ''sythe''. However, in the 15th century some writers began to use the ''sc-'' spelling as they thought (wrongly) the word was related to the Latin ''scindere'' (meaning "to cut"). Nevertheless, the ''sithe'' spelling lingered and notably appears in Noah Webster's dictionaries. A scythe consists of a shaft about long called a ''snaith'', ''snath'', ''snathe'' or ''sned'', traditionally made of wood but now sometimes me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shot Peening
Shot peening is a cold working process used to produce a compressive residual stress layer and modify the mechanical properties of metals and composites. It entails striking a surface with shot (round metallic, glass, or ceramic particles) with force sufficient to create plastic deformation."Shot Peening," ''Tool and Manufacturing Engineers Handbook'' (TMEH), Volume 3, Society of Manufacturing Engineers, 1985 In machining, shot peening is used to strengthen and relieve stress in components like steel automobile crankshafts and connecting rods. In architecture it provides a muted finish to metal. Shot peening is similar mechanically to sandblasting, though its purpose is not to remove material, but rather it employs the mechanism of plasticity to achieve its goal, with each particle functioning as a ball-peen hammer. Details Peening a surface spreads it plastically, causing changes in the mechanical properties of the surface. Its main application is to avoid the propagation of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penis
A penis (plural ''penises'' or ''penes'' () is the primary sexual organ that male animals use to inseminate females (or hermaphrodites) during copulation. Such organs occur in many animals, both vertebrate and invertebrate, but males do not bear a penis in every animal species, and in those species in which the male does bear a so-called penis, the penises in the various species are not necessarily homologous. The term ''penis'' applies to many intromittent organs, but not to all. As an example, the intromittent organ of most cephalopoda is the hectocotylus, a specialized arm, and male spiders use their pedipalps. Even within the Vertebrata there are morphological variants with specific terminology, such as Hemipenis, hemipenes. In most species of animals in which there is an organ that might reasonably be described as a penis, it has no major function other than intromission, or at least conveying the sperm to the female, but in the Eutheria, placental mammals the peni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peene (other)
Peene may refer to: * Peene, a river in Germany * Peene Becque, a river in France * Peene, Kent, a village in England * Hippoliet van Peene Hippoliet Jan Van Peene (1 January 1811 in Kaprijke – 19 February 1864 in Ghent) was a Flemish physician and playwright. He studied medicine at the State University of Leuven and became a physician in Kaprijke and later in Ghent. In 1847 he w ... (1811–1864), a Flemish physician and playwright See also * Peen (other) {{disamb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pein
Pein is a surname. Notable people with the surname include: * Anton Pein (born 1967), Austrian darts player * Friedrich Pein (1915–1975), Austrian sniper *Malcolm Pein Malcolm Bernard Pein (born 14 August 1960) is a British chess player, chess organizer, author, and journalist. He holds the title of International Master. Chess biography Pein earned the title of International Master (IM) in 1986. Pein has been a ... (born 1960), British chess player, author, and journalist See also * Peen (other) {{surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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