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Tap And Die
In the context of threading, taps and dies are the two classes of tools used to create screw threads. Many are cutting tools; others are forming tools. A tap is used to cut or form the female portion of the mating pair (e.g. a nut). A die is used to cut or form the male portion of the mating pair (e.g. a bolt). The process of cutting or forming threads using a tap is called ''tapping'', whereas the process using a die is called ''threading''. Both tools can be used to clean up a thread, which is called ''chasing''. However, using an ordinary tap or die to clean threads generally removes some material, which results in looser, weaker threads. Because of this, machinists generally clean threads with special taps and dies—called '' chasers''—made for that purpose. Chasers are made of softer materials and don't cut new threads. However they still fit tighter than actual fasteners, and are fluted like regular taps and dies so debris can escape. Car mechanics, for example, use ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tool And Die Maker
Tool and die makers are highly skilled crafters working in the manufacturing, manufacturing industries. Tool and die makers work primarily in toolroom environments—sometimes literally in one room but more often in an environment with flexible, semipermeable boundaries from production work. They are skilled artisans (craft production, craftspeople) who typically learn their trade through a combination of academic coursework and with substantial period of on-the-job training that is functionally an apprenticeship. They make Jig (tool), jigs, Fixture (tool), fixtures, die (manufacturing), dies, molding (process), molds, machine tools, cutting tool (machining), cutting tools, gauge (instrument), gauges, and other tools used in manufacturing processes. Divisions The main divisions of the tool & die industry include: *Die casting *Die (manufacturing), Dies *Fixture (tool), Fixtures *Forging *Gauge (instrument), Gauges *Jig (tool), Jigs *Metalworking, Metal working *Molding (process), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lathe (metal)
In machining, a metal lathe or metalworking lathe is a large class of lathes designed for precisely machining relatively hard materials. They were originally designed to machine metals; however, with the advent of plastics and other materials, and with their inherent versatility, they are used in a wide range of applications, and a broad range of materials. In machining jargon, where the larger context is already understood, they are usually simply called ''lathes'', or else referred to by more-specific subtype names ('' toolroom lathe'', '' turret lathe'', etc.). These rigid machine tools remove material from a rotating workpiece via the (typically linear) movements of various cutting tools, such as tool bits and drill bits. Metal lathes can vary greatly, but the most common design is known as the universal lathe or parallel lathe. Construction The design of lathes can vary greatly depending on the intended application; however, basic features are common to most types. These ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenfield, Massachusetts
Greenfield is the county seat, and sole city, of Franklin County, Massachusetts, United States. Greenfield was first settled in 1686. The population was 17,768 at the 2020 United States census, 2020 census. Greenfield is home to Greenfield Community College (Massachusetts), Greenfield Community College, the Pioneer Valley Symphony Orchestra, the Franklin County Fair, and the Green River Festival. The city has a Main Street Historic District containing fine examples of Federal architecture, Federal, Greek Revival architecture, Greek Revival, and Victorian architecture. Greenfield anchors the Greenfield Town, MA Micropolitan Statistical Area, which is included in the Springfield, Massachusetts, Springfield-Greenfield Town, MA Springfield metropolitan area, Massachusetts, Combined Statistical Area. History Pocumtuck Indigenous peoples of the Americas, Indians first settled and originally inhabited the Greenfield area. Native American artifacts found in the area have been dated bet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kennametal
Kennametal, Inc. is a manufacturer of high-performance cutting tools and engineered components used in the aerospace, defense, transportation and oil and gas drilling industries. Its customer base is global. History Kennametal was founded in 1938 by Philip M. McKenna in the Latrobe, Pennsylvania area. The company evolved from Vanadium Alloys Steel Company (VASCO), founded in 1910 by the McKenna family with its headquarters in Latrobe, Pennsylvania. While research director of VASCO, metallurgist Philip McKenna developed and received a patent for a tungsten-titanium carbide composition. McKenna formed Kennametal, Inc. for the purpose of marketing this alloy. The company's original flagship product, known as "Kennametal", was introduced in the late 1930s. It was described as "much harder than the hardest tool steel," which enabled high-rate steel cutting not possible previously. In July 1940, Kennametal of Canada Ltd. was organized for the purpose of "manufacturing Kennametal, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Screw Thread
A screw thread is a helical structure used to convert between rotational and linear movement or force. A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a ''straight'' thread and the latter called a ''tapered'' thread. A screw thread is the essential feature of the screw as a simple machine and also as a threaded fastener. The mechanical advantage of a screw thread depends on its ''lead'', which is the linear distance the screw travels in one revolution. In most applications, the lead of a screw thread is chosen so that friction is sufficient to prevent linear motion being converted to rotary, that is so the screw does not slip even when linear force is applied, as long as no external rotational force is present. This characteristic is essential to the vast majority of its uses. The tightening of a fastener's screw thread is comparable to driving a wedge into a gap until it sticks fast through friction and slight ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Threading (manufacturing)
In manufacturing, threading is the process of creating a screw thread. More screw threads are produced each year than any other machine element. There are many methods of generating threads, including subtractive methods (many kinds of thread cutting and grinding, as detailed below); deformative or transformative methods (rolling and forming; molding and casting); additive manufacturing, additive methods (such as 3D printing); or combinations thereof. Overview of methods (comparison, selection, etc.) There are various methods for generating screw threads. The method for any one application is chosen based on constraints—time, money, degree of precision needed (or not needed), what equipment is already available, what equipment purchases could be justified based on resulting unit price of the threaded part (which depends on how many parts are planned), etc. In general, certain thread-generating processes tend to fall along certain portions of the spectrum from toolroom-made parts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Milling Machine
Milling is the process of machining using rotary cutters to remove material by advancing a cutter into a workpiece. This may be done by varying directions on one or several axes, cutter head speed, and pressure. Milling covers a wide variety of different operations and machines, on scales from small individual parts to large, heavy-duty gang milling operations. It is one of the most commonly used processes for machining custom parts to precise tolerances. Milling can be done with a wide range of machine tools. The original class of machine tools for milling was the milling machine (often called a mill). After the advent of computer numerical control (CNC) in the 1960s, milling machines evolved into ''machining centers'': milling machines augmented by automatic tool changers, tool magazines or carousels, CNC capability, coolant systems, and enclosures. Milling centers are generally classified as vertical machining centers (VMCs) or horizontal machining centers (HMCs). The integr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Clement
Joseph Clement (13 June 1779 – 28 February 1844) was a British engineer and industrialist, chiefly remembered as the maker of Charles Babbage's first difference engine, between 1824 and 1833. Biography Early life Joseph Clement was born on 13 June 1779 at Great Asby in Westmorland, the son of a hand-loom weaver. Although he was taught to read and write at the local school, he learned mechanics and natural history from his father, Thomas, who had built himself a lathe. He worked, first as a weaver, then as a slater, and learned metalwork from the local blacksmith. With these skills, he built himself his own lathe, on which he turned woodwind musical instruments, which he then learned to play. By 1805 he was making looms at a factory in Kirkby Stephen, then moved first to Carlisle, then to Glasgow where he learned draughtsmanship from Peter Nicholson. By 1812 he was with Leys, Masson & Co. in Aberdeen, where he attended lectures in natural philosophy at Marischal College. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
