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Encyclopedia > Punch (engineering)

A variety of punches are used in engineering. Engineering is the application of scientific and technical knowledge to solve human problems. ...

Contents


Center

center punch

A center punch is typically used as an aid to drilling operations; a drill, when brought into contact with a flat surface, will have a tendency to wander on the surface until it gains sufficient purchase to start cutting a hole. A center punch forms a small dimple in which the tip of the drill (if it is small enough) will fit. When drilling larger holes and the web of the drill is wider than the indentation produced by a center punch, the drilling of a pilot hole is usually needed. A center punch usually has a tip, that when viewed on a profile, has sides at a 90 degree angle to one another.
Image File history File links Punch_(center). ... Image File history File links Punch_(center). ... A drill is a tool with a rotating drill bit used for drilling holes in various materials. ...


Prick

prick punch
Enlarge
prick punch

A prick punch, while easily confused with the similar looking center punch, serves an entirely different purpose. A prick punch is primaly used for the purposes of layout. By design it produces a smaller indentation than a center punch, which acts as a useful datum point in layout operations. When layout is complete, the indentation made with a prick punch can be enlarged with a center punch to allow for drilling. A prick punch usually has a tip, that when viewed on a profile, has sides at a 30-60 degree angle to one another. Image File history File links 62435-copy2. ... Image File history File links 62435-copy2. ...


Transfer

transfer punch

A transfer punch is a punch (usually in an index set) of a specific outer diameter that is non-tapered and extends the entire length of the punch (except for the tip). It is used to tightly fit the tolerances of an existing hole and, when struck, precisely transfer the center of that hole to another surface. It can be used, for example, to duplicate the hole patterns in a part, or precisely set locations for threaded holes (created by drilling and tapping) to bolt an object to a surface.
Image File history File links Punch_(transfer). ... Image File history File links Punch_(transfer). ... Taps and dies are tools commonly used in metalworking for the cutting of screw threads in metal parts. ...


Pin

pin punch

The purpose served by pin punches is somewhat different than the center or prick punches. A pin punch is used as a driving tool, typically, as the name implies, to drive pins that are used to affix a fixture to a rotating shaft. Pin punches are typically characterized by a hexagonal body, with a long, flat ended cylindrical section.
Image File history File links Punch_(pin). ... Image File history File links Punch_(pin). ...


Doming

Doming punches
Doming punches

A doming punch is used in conjunction with a doming block to make spheres or hemispheres out of sheets of metal. The punch is generally made of tool steel, but can be made of wood. They come in a number of different sizes, the punch size determining what size the finished product will be.
Wikipedia does not have an article with this exact name. ... Wikipedia does not have an article with this exact name. ... doming blocks and punch The technique of doming (or dapping) is used to make spheres or hemispheres of metal. ... Tool steel refers to a variety of carbon and alloy steels that are particularly well-suited to be made into tools. ...


Drift

drift punch
Enlarge
drift punch

A drift "punch" is misleadingly named; it is not used as a punch in the traditional sense of the term. A drift punch, or drift pin, is used as an aid in aligning bolt or rivet holes prior to inserting a fastener. A drift punch is constructed as a tapered rod, with the hammer acting on the large end of the taper. The tapered end of a drift punch is placed into the semi-aligned bolt holes of two separate components, and then driven into the hole. As it is driven in, the taper forces the two components into alignment, allowing for easy insertion of the fastener. Unlike most punches, force is never (and should never be) applied to the tip, or end of a drift pin.
Image File history File links 62441-copy. ... Image File history File links 62441-copy. ... A rivetted buffer beam on a steam locomotive A rivet is a mechanical fastener consisting of a smooth cylindrical shaft with heads on either end, the second one formed in position. ...


Letter

Letter stamps
Letter stamps

Also known as Letter or Number stamps.
These are used to emboss the impression of a letter or number into a workpiece. They are most common in the reverse image, this allows the end result to be immediately readable, however they may be made as a positive image. This is essential in the case of die or mold making and ensures that the finished product will in fact be readable, a die is in fact a negative image already. Download high resolution version (1461x1029, 254 KB)Photograph taken by Glenn McKechnie on the 24th March 2005. ... Download high resolution version (1461x1029, 254 KB)Photograph taken by Glenn McKechnie on the 24th March 2005. ... The notes on Leonardo da Vincis famous Vitruvian Man image are in mirror writing. ... One half of a bronze mould for casting a socketed spear head dated to the period 1400-1000 BC. There are no known parallels for this mould. ...




Metalworking:

Metalworking hand tools: 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. ...

Ball-peen hammer | Combination square | Drift pin | File (metalwork) | File (tool) | Hammer | Hand scraper | Machinist square | Magnetic base | Peening | Pliers | Power tool | Punch | Punches | Rotary tool | Scriber | Tongs | Tool | Vise | Workbench | Wrench A 380 mm (15 in) ball-peen hammer. ... A combination square is a tool used for multiple purposes. ... In metalworking, a drift pin (or simply drift) is the name for several kinds of tools used for enlarging holes, or aligning holes prior to bolting or riveting metal parts together. ... A File (or Hand-File) is a metalworking hand tool used to shape material by abrasion. ... Detail of a double-cut flat file A file is a hand tool consisting of a steel shaft whose surface is cut with sharp parallel ridges made by a chisel before the file is hardened. ... A claw hammer A hammer is a tool meant to deliver blows to a target, causing it to move or deform. ... Three different engineering hand scrapers A hand scraper is a single-edged tool used to scrape metal from a surface. ... Two typical engineers squares A machinist square or engineers square is the metalworkers equivalent of a try square. ... Magnetic base as used in the engineering metaltrades. ... A 380 mm (15 in) ball-peen hammer. ... Needle nose pliers Pliers are hand tools primarily for gripping that use leverage There are numerous different jaw configurations to grip, turn, pull, or crimp a variety of things. ... A power tool is a tool with a motor. ... A handheld power tool with a variety of rotating accessory bits and attachments that can be used for cutting, carving, sanding, polishing and many other applications. ... An assortment of metal working scribers Scribers are hand tools used in the metal trades to mark lines on workpieces, prior to machining. ... Tongs used for cooking or serving food Tongs are gripping and lifting tools, of which there are many forms adapted to their specific use. ... [[|right|thumb|A modern hammer is directly descended from ancient hand tools]] A tool is a device that (most commonly) provides an [mechanical] advantage in accomplishing a [physical] task. ... A vise (or vice) is a mechanical screw apparatus used for holding or clamping a workpiece to allow work to be performed on it with other tools, such as saws, planes, drills, mills, screwdrivers, sandpaper, Without qualification, vise usually refers to a bench vise with flat, parallel jaws, attached to... AmigaOS is the default native operating system of the Amiga and AmigaOne personal computers. ... A wrench or spanner is a tool used to turn bolts, nuts or other hard-to-turn items. ...


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 Cowboys Naked Colonially, 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 EIA-274-D... 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:
 
Woodley Engineering - The UK's leading cutting punch manufacturer - Our Punches (224 words)
All our punches are made from high carbon tool steel.
Tool steel punches are superior to punches made from mild steel.
We have extensive stocks of standard round cutting punches from 1.5mm (1/16") diameter to 32mm (1.1/4") diameter in a range of standard types at 23.80mm (.937") high.
  More results at FactBites »


 

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