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Encyclopedia > Punching

Metals

Punching in metal fabrication is the process of using a machine to press a shape through a sheet of metal and into a die to create that shape in the metal. This is most commonly done by use of a turret, a computer numerical controlled machine that houses tools and their corresponding dies in a revolving indexed turret. These machines use hydraulic, pneumatic, or electrical power to press the shape with enough force to cut the metal. Turned chess pieces Metalworking is the craft and practice of working with metals to create parts or structures. ... See Die for other meanings of this word A die is a tool used in the manufacture of parts by the molding process. ... Turret (highlighted) attached to a tower on a baronial building in Scotland In architecture, a turret (from Italian: torretta, little tower; Latin: turris, tower) is a small tower that projects from the wall of a building, such as a medieval castle or baronial house. ... A CNC Turning Center The abbreviation CNC stands for Computer(ized) Numerical(ly) Control(led), and refers specifically to the computer control of machine tools for the purpose of (repeatedly) manufacturing complex parts in metal as well as other materials, using a program written in a notation conforming to the... Hydraulics is a branch of science and engineering concerned with the use of liquids to perform mechanical tasks. ... Pneumatics, from the Greek πνευματικός (pneumatikos, coming from the wind) is the use of pressurized air in science and technology. ... The article on electrical energy is located elsewhere. ...


A misconception about punching is that the shape does the cutting, when in fact the shape presses the material into a die that cuts the metal. The die is also given a tolerance that is measured in thousands of an inch.


Punching can be better understand as pressing the material against a die with a huge force,this force pushes the material into the die and shears off the waste material.


Plastics

Punching in plastics fabrication usually refers to the removal of scrap plastic from the desired article. For example, in extrusion blow molding it is common to use punching dies to remove tails, flash (scrap plastic) and handle slugs from bottles or other molded containers. Blow molding is a manufacturing process by which hollow plastic parts are formed. ...


In shuttle machinery, the containers are usually trimmed in the machines, and finished containers leave the blow molding machine. Other blow molding equipment, such as rotary wheel machinery, requires the use of downstream trimming. Types of downstream trimming equipment include detabbers for tail removal, rotary or reciprocating punch trimmers, and spin trimmers. Shuttle machines are a significant workhorse in the extrusion blow molding of hollow plastic articles such as bottles for food storage. ... Rotary wheel blow molding systems are used for the high-output production of a wide variety of plastic extrusion blow molded articles. ...



Metalworking:

Metal forming: Image File history File links Blacksmith-hammer-anvil-50x50. ... Turned chess pieces Metalworking is the craft and practice of working with metals to create parts or structures. ...

Coin die | Coining | Cold rolling | Die | Drawing | Electromagnetic forming | Flypress | Hot rolling | Hydraulic press | Hydroforming | Machine press | Progressive stamping | Progressive die | Punching | Punch press | Rolling | Shear | Stamping press | Swage A coin die is one of the two metallic pieces that are used to strike one side of a coin. ... Coining is a form of precision stamping. ... Rolling mill for cold rolling metal sheet like this piece of brass sheet. ... See Die for other meanings of this word A die is a tool used in the manufacture of parts by the molding process. ... Drawing is a manufacturing process for producing a wire, bar or tube by pulling on a material until it increases in length. ... Electromagnetic forming (EM forming) is a high energy rate metal forming process, that uses ultrastrong pulsed magnetic fields, to reshape metal parts rapidly . ... A Flypress is a metalworking machine tool used to punch holes in sheet metal in one operation, rather than by cutting the hole or drilling, etc. ... Hot rolling is a metallurgical process in which the metal is passed through a pair of rolls and the temperature of the metal is above its recrystallization temperature, as opposed to cold rolling, which takes place below it. ... // The Hydrualic Press The hydraulic presses are capable of pressure at the head of 2,000 tons, and can cold form metal. ... Hydroforming is a cost-effective way of shaping malleable metals such as aluminum into lightweight, structurally stiff and strong pieces. ... Power press with a fixed barrier guard A press, or a machine press is a tool used to work metal (typically steel) by changing its shape and internal structure. ... Progressive (punch and blanking) die with strip and punchings Progressive stamping is a metalworking method that can encompass punching, coining, bending and several other ways of modifying metal raw material, combined with an automatic feeding system. ... Progressive die with strip and punchings A progressive stamping die (die) is a metalworking device that is designed and built to convert a strip of metal raw material into parts that to conform blueprint specifications. ... A Punch Press is a machine that has a set of punches and dies, a male (punch) and female (die), which when pressed together put a hole into the material used that is the same geometry as the punch that is being used. ... Rolling is a fabricating process in which the metal, plastic, paper, glass, etc. ... A guillotine is a machine used to accurately cut sheet metal. ... A stamping press (press) is a manufacturing device that is designed and built to operate progressive stamping dies and other types of dies. ... Swaging is a metal forming technique in which the metal is plastically deformed to its final shape using high pressures. ...


Metalworking topics:   Casting | CNC | Cutting tools | Drilling and threading | Fabrication | Finishing | Grinding | Jewellery | lathe (tool) | Machining | Machine tooling | Measuring | Metalworking | Hand tools | Metallurgy | Milling | Occupations | Press tools | Smithing | Terminology | Welding One half of a bronze mold for casting a socketed spear head dated to the period 1400-1000 BC. This article is about the manufacturing process; for other uses, see Casting (disambiguation). ... A CNC Turning Center The abbreviation CNC stands for Computer(ized) Numerical(ly) Control(led), and refers specifically to the computer control of machine tools for the purpose of (repeatedly) manufacturing complex parts in metal as well as other materials, using a program written in a notation conforming to the... a Cutting Tool, in the context of Metalworking is any tool that is used to remove metal from the workpiece by means of shear deformation. ... Drilling is the process of using a drill bit in a drill to produce holes. ... A typical steel fabrication shop Fabrication is an industrial term generally applied to the building of metal machines and structures. ... Rotating abrasive wheel on a bench grinder. ... Comedian Joan Rivers wearing bracelets, necklaces, and rings on the cover of a book about her jewellery collection. ... Conventional metalworking lathe In woodturning, metalworking, metal spinning, and glassworking, a lathe is a machine tool which spins a block of material so that when abrasive, cutting, or deformation tools are applied to the block, it can be shaped to produce an object which has rotational symmetry about an axis... A lathe is a common tool used in machining. ... A machine tool is a powered mechanical device, typically used to fabricate metal components of machines by the selective removal of metal. ... Turned chess pieces Metalworking is the craft and practice of working with metals to create parts or structures. ... Metalworking hand tools are hand tools that are used in the metalworking field. ... Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements, their intermetallic compounds and their mixtures, which are called alloys. ... Cutters for a milling machine. ... It has been suggested that this article or section be merged with Smith (metalwork). ... Power press with a fixed barrier guard A press, or a machine press is a tool used to work metal (typically steel) by changing its shape and internal structure. ... A smith or metalsmith is a person involved in the shaping of metal objects. ... This article needs to be wikified. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ...


  Results from FactBites:
 
Punch.co.uk (147 words)
Punch, the magazine of humour and satire, ran from 1841 until its closure in 2002.
A very British institution with an international reputation for its witty and irreverent take on the world, it published the work of some of the greatest comic writers (Thackeray, P G Wodehouse and P J O’Rourke among others) and gave us the cartoon as we know it today.
The world’s finest cartoonists appeared in Punch: such great names as Tenniel, E H Shepard, Fougasse, and Pont.
Who is Mr Punch (2206 words)
The original significance of Punch's face and figure - his enormous nose and hump - are meaningless to an audience of modern times when, perhaps, it is not customary to associate large noses and sexual potency or find hunchbacks mirth provoking.
Punch's own self but the killing of Judy and the Baby are seen as the achieving of dominion over the levels they represent and the beginnings of the work of self discipline and self conquest.
He is, however, the only character in the Punch drama to have legs, the rest are simple glove puppets who leave the existence of their legs entirely to the audiences imagination.
  More results at FactBites »


 

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