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Seam (metallurgy)
Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. Hemming is the process in which the edge is rolled flush to itself, while a seam joins the edges of two materials.. Hems are commonly used to reinforce an edge, hide burrs and rough edges, and improve appearance. Seams are commonly used in the food industry on canned goods, on amusement park cars, in metal roof A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope. The metal pieces may be a covering on a structural, non-waterpro ...ing (with a roof seamer), and in the automotive industry. Process The process for both hemming and seaming are the same, except that the tonnage (amount of force exerted) requirement is greater for seaming. The process starts by bending the edge to an acute angle. A flattening die is then used to flatten the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hem Sheetmetal
A hem in sewing is a garment finishing method, where the edge of a piece of cloth is folded and sewn to prevent unravelling of the fabric and to adjust the length of the piece in garments, such as at the end of the sleeve or the bottom of the garment. Methods There are many different styles of hems of varying complexities. The most common hem folds up a cut edge, folds it up again, and then sew it down. The style of hemming thus completely encloses the cut edge in cloth, so that it cannot unravel. Other hem styles use fewer folds. One of the simplest hems encloses the edge of cloth with a stitch without any folds at all, using a method called an overcast stitch, although an overcast stitch may be used to finish a folded "plain hem" as well. There are even hems that do not call for sewing, instead using iron-on materials, netting, plastic clips, or other fasteners. These threadless hems are not common, and are often used only on a temporary basis. The hem may be sewn down with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Can Solderless Seam Cutaway
Can may refer to: Language * A verb for ability * A verb for probability Containers * A container used for food preservation in canning ** Aluminum can ** Drink can ** Steel and tin cans * Trash can * Oil can * Petrol can Music * Can (band), West Germany, 1968 ** Can (album), ''Can'' (album), 1979 * Can (South Korean band) Abbreviations *Canada, a country *Cantoris, side of a church or choir Other * Can (name), Turkish and Circassian given name and surname * Can (verb) * Canning of food * River Can, Essex, UK * Tomato can (sports idiom) See also * CAN (other) * Cann (other) * Cans (other) * Kan (other) * Can-can (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metalworking
Metalworking is the process of shaping and reshaping metals in order to create useful objects, parts, assemblies, and large scale structures. As a term, it covers a wide and diverse range of processes, skills, and tools for producing objects on every scale: from huge ships, buildings, and bridges, down to precise engine parts and delicate jewellery. The historical roots of metalworking predate recorded history; its use spans cultures, civilizations and millennia. It has evolved from shaping soft, native metals like gold with simple hand tools, through the smelting of ores and hot forging of harder metals like iron, up to and including highly technical modern processes such as machining and welding. It has been used as an industry, a driver of trade, individual hobbies, and in the creation of art; it can be regarded as both a science and a craft. Modern metalworking processes, though diverse and specialized, can be categorized into one of three broad areas known as forming, cutt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sheet Metal
Sheet metal is metal formed into thin, flat pieces, usually by an industrial process. Thicknesses can vary significantly; extremely thin sheets are considered foil (metal), foil or Metal leaf, leaf, and pieces thicker than 6 mm (0.25 in) are considered plate, such as plate steel, a class of structural steel. Sheet metal is available in flat pieces or coiled strips. The coils are formed by running a continuous sheet of metal through a roll slitting, roll slitter. In most of the world, sheet metal thickness is consistently specified in millimeters. In the U.S., the thickness of sheet metal is commonly specified by a traditional, non-linear measure known as its Sheet metal gauge, gauge. The larger the gauge number, the thinner the metal. Commonly used steel sheet metal ranges from 30 gauge (0.40 mm) to about 7 gauge (4.55 mm). Gauge differs between ferrous (Iron, iron-based) metals and nonferrous metals such as aluminum or copper. Copper thickness, for example ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amusement Park
An amusement park is a park that features various attractions, such as rides and games, and events for entertainment purposes. A theme park is a type of amusement park that bases its structures and attractions around a central theme, often featuring multiple areas with different themes. Unlike temporary and mobile Travelling funfair, funfairs and traveling carnival, carnivals, amusement parks are stationary and built for long-lasting operation. They are more elaborate than Urban park, city parks and playgrounds, usually providing attractions that cater to a variety of age groups. While amusement parks often contain themed areas, theme parks place a heavier focus with more intricately designed themes that revolve around a particular subject or group of subjects. Amusement parks evolved from European fairs, pleasure gardens, and large Picnic, picnic areas, which were created for people's recreation. World's fairs and other types of international expositions also influenced the em ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metal Roof
A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope. The metal pieces may be a covering on a structural, non-waterproof roof, or they could be self-supporting sheets. History Lead and copper have played a significant role in architecture for thousands of years (see: copper in architecture). Lead was one of the first and easiest metals to Smelting, smelt and with a low melting point, it could be easily formed to be watertight. As a by-product of silver smelting, in Roman times it was readily available and relatively cheap. In the 3rd century Before Common Era, BCE, copper roof shingles were installed atop the Lovamahapaya, Lovamahapaya Temple in Sri Lanka. The Ancient Rome, Romans used copper as roof covering for the Pantheon, Rome, Pantheon in 27BCE. Centuries later, copper and its alloys were integral in European medieval architecture. The copper roof ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roof Seamer
A roof seamer is a portable roll forming machine that is used to install mechanically seamed structural standing-seam metal roof panels, as part of an overall metal construction building envelope system. The machine is small and portable to be handled by an operator on top of a roof. The machine is applied to the overlapping area when two parallel roof panels meet. The action of the machine bends the two panels together to form a joint that has weather-tight qualities superior to other types of roof systems and cladding. History Commonly, a roof seamer is developed as an afterthought. Since roof seamers are dependent on the metal roof system being used, their development was secondary to the roof panel. A roof seamer is a development that replaced a manual process and hand tools of the past. A hammer and small anvil were tools that were used for hemming and seaming roof panels together at the edge where they meet with the next roof panel in sequence. In 1976, a German immigra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Automotive Hemming
Hemming is a technology used in the automotive industry to join inner and outer closure panels together (hoods, doors, tailgates, etc.). It is the process of bending/folding the flange of the outer panel over the inner one. The accuracy of the operation significantly affects the appearance of the car’s outer surfaces and is therefore a critical factor in the final quality of a finished vehicle. Hemming processes Press hemming Hemming presses are widely used in automotive manufacturing for the hemming of sheet-metal body components. The process uses traditional hydraulically operated ‘stamping presses’ to hem closure parts, and, being the last forming process in stamping, it largely determines the external quality of such automotive parts as doors, hoods, and trunk lids. Hemming press features and benefits * Die storage systems * Fully automatic die-changing systems with parameters that change with each die * Pressing capacity typically 60 to 180 tons * Large panel-size ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
