A jig is any of a large class of tools in woodworking, metalworking, and some other crafts that help to control the location or motion (or both) of a tool. Woodworking is the process of building making or carving something using Wood. Metalworking is craft and practice of working with Metals to create individual parts assemblies or large scale structures Some types of jigs are also called templates or guides. The primary purpose for a jig is for repeatability and exact duplication of a part for reproduction. An example of a jig is when a key is duplicated, the original is used as a jig so the new key can have the same path as the old one. In the advent of automation and CNC machines, jigs are not required because the tool path is digitally programmed and stored in memory. jigs may be made for reforming plastics, and also for use in reproduction of materials. this also includes templates. see templates for details
Jigs or templates have been known long before the industrial age. There are many types of jigs, and each one is custom-tailored to do a specific job. Many jigs are created because there is a necessity to do so by the tradesmen. This article is about the skilled manual worker meaning of the term for other uses see Tradesperson (disambiguation A tradesman is a skilled manual worker Some are purely to increase productivity, to do repetitious activities and to add precision to a job. Because jig design is fundamentally based on logic, it is highly possible that the same jig created in one geographical region was created independently in another region or was created previously in another era and all the creators were unaware of each other's jig yet created it in an almost identical manner. Logic is the study of the principles of valid demonstration and Inference.
Tools of this class include machining jigs, woodworking jigs (e. g. tapering jig), welders' jigs, jewelers' jigs, and many others. A tapering jig is a Woodworking jig used to cut a progressively deeper cut along a workpiece usually parallel to the grain A jig used in making Jewelry is a plate or open frame for holding work and helping to shape jewelry components made out of Wire or small sheets of metal
A jigsaw is called so because it is used to cut arbitrary curves used in jigs.
Drill jig
A drill jig is type of jig that expedites repetitive hole center location on multiple interchangeable parts by acting as a template to guide the twist drill or other boring device into the precise location of each intended hole center. For the ficitonal character see Drill Bit (Transformers. Drill bits are cutting tools used to create cylindrical holes In metalworking practice, typically a hardened bushing lines each hole on the jig to keep the twist drill from cutting the jig.
Drill jigs started falling into disuse with the invention of the jig borer. The jig borer is a type of Machine tool invented at the end of World War I to make possible the quick-yet-very-precise location of hole centers
Since the widespread penetration of the manufacturing industry by CNC machine tools, in which the servocontrols are capable of moving the tool to the correct location automatically, the need for drill jigs (and for the jobs of the drill press operators who used them) is a fraction of what it previously. The abbreviation CNC stands for computer numerical control, and refers specifically to a computer "controller" that reads G-code A machine tool is a powered mechanical device typically used to fabricate metal components of machines by Machining, which is the selective removal of metal A drill (from Dutch Drillen) is There are PCB jigs which are used to test the PCB's. They have dump board inside the jig which can fault find the PCB's
See also
External links
- Wedge Operated Jig by Sándor Kabai and Lajos Szilassi, The Wolfram Demonstrations Project. The jig borer is a type of Machine tool invented at the end of World War I to make possible the quick-yet-very-precise location of hole centers A jig grinder is a Machine tool used for grinding complex shapes and holes where the highest degrees of accuracy and finish are required A staircase jig is a woodworking tool that incorporates both a Right angle and an Acute angle in its design A sharpening jig is often used when Sharpening Woodworking tools A fixture is a tool of the Manufacturing industry used in Mass production.
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