Conventional machining, one of the most important material removal methods, is a collection of material-working processes in which power-driven machine tools 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. The term machine tool is usually reserved for tools that used a power source other than human movement, but they can be powered by people if appropriately set up. Many historians of, such as lathes A lathe is a machine tool which spins a block of material to perform various operations such as cutting, sanding, knurling, drilling, or deformation with tools that are applied to the workpiece to create an object which has symmetry about an axis of rotation, milling machines A milling machine is a machine tool used for the shaping of metal and other solid materials. Milling machines exist in two basic forms: horizontal and vertical, which terms refer to the orientation of the cutting tool spindle. Unlike a drill press, in which the workpiece is held stationary and the drill is moved vertically to penetrate the, and drill presses A drill or drill motor is a tool fitted with a rotating cutting implement used for drilling holes in various materials. The drill bit is gripped by a chuck at one end of the drill and rotated while pressed against the target material. The tip of the drill bit does the work of cutting into the target material, either slicing off thin shavings (, are used with a sharp cutting tool to mechanically cut the material to achieve the desired geometry. Machining is a part of the manufacture of almost all metal products, and it is common for other materials, such as wood and plastic, to be machined. A person who specializes in machining is called a machinist A machinist is a person who uses machine tools to make or modify parts, primarily metal parts, a process known as machining. This is accomplished by using machine tools to cut away excess material much as a woodcarver cuts away excess wood to produce his work. In addition to metal, the parts may be made of many other kinds of materials, such as. A room, building, or company where machining is done is called a machine shop. Much of modern day machining is controlled by computers using computer numerical control (CNC) machining. Machining can be a business, a hobby, or both.
The precise meaning of the term "machining" has evolved over the past 1.5 centuries as technology has advanced. During the Machine Age The Machine Age is a term associated mostly with the early 20th century, or sometimes with the late 19th and early 20th. Considered to be at a peak in the time between the first and second world wars, it forms a late part of the Industrial Age. It was ultimately eclipsed by the Atomic Age beginning in 1945, it referred to (what we today might call) the "traditional" machining processes, such as turning Turning is the process whereby a single point cutting tool is parallel to the surface. It can be done manually, in a traditional form of lathe, which frequently requires continuous supervision by the operator, or by using a computer controlled and automated lathe which does not. This type of machine tool is referred to as having computer numerical, boring In machining, boring is the process of enlarging a hole that has already been drilled , by means of a single-point cutting tool (or of a boring head containing several such tools), for example as in boring a cannon barrel. Boring is used to achieve greater accuracy of the diameter of a hole, and can be used to cut a tapered hole, drilling Drilling is a cutting process that uses a drill bit to cut or enlarge a hole in solid materials. The drill bit is a multipoint, end cutting tool. It cuts by applying pressure and rotation to the workpiece, which forms chips at the cutting edge. One study[citation needed] showed that drilling accounts for nearly 90% of all chips produced.[, milling A milling machine is a machine tool used for the shaping of metal and other solid materials. Milling machines exist in two basic forms: horizontal and vertical, which terms refer to the orientation of the cutting tool spindle. Unlike a drill press, in which the workpiece is held stationary and the drill is moved vertically to penetrate the, broaching Broaching is a machining operation which uses a toothed tool, called a broach, to remove material. The broach is used in a broaching machine, which is also sometimes shortened to broach. It is used when precision machining is required, especially for odd shapes. Broaching finishes a surface in a single pass, which makes it very efficient. Commonly, sawing The condemned was hung upside down and then sawed apart down the middle, starting at the rectum. Since the condemned was hanging upside-down, the brain received a continuous blood supply in spite of severe bleeding. The condemned would remain alive and conscious until the saw severed the major blood vessels of the abdomen, and sometimes even, shaping Shapers have been largely superseded by milling machines or grinding machines in modern industrial practice. The basic function of a shaper machine is still sound and tooling for them is minimal and very cheap to reproduce. They can be invaluable for jobbing or repair shops where only one or a few pieces are required to be produced and the, planing A planer is a type of metalworking machine tool that is analogous to a shaper, but larger, and with the entire workpiece moving beneath the cutter, instead of the cutter moving above a stationary workpiece. The work table is moved back and forth on the bed beneath the cutting head either by mechanical means, such as a rack and pinion gear, or by a, reaming A reamer or ream is a tool used in machining to make existing holes dimensionally more accurate and to improve surface finish. Reamers are used mostly in the metalworking areas of machining. They may be used as hand tools or in the spindles of machine tools such as milling machines or drill presses, and tapping Taps and dies are cutting tools used when creating screw threads. A tap is used to cut the female portion of the mating pair . A die is used to cut the male portion of the mating pair (e.g. a bolt). The process of cutting the threads in a hole is called "tapping" the hole. The process of cutting with a die is called "threading", or sometimes to grinding A grinding machine is a machine tool used for grinding, which is a type of machining using an abrasive wheel as the cutting tool. Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation. Since the advent of new technologies such as electrical discharge machining Electric discharge machining , sometimes colloquially also referred to as spark machining, spark eroding, burning, die sinking or wire erosion, is a manufacturing process whereby a wanted shape of an object, called workpiece, is obtained using electrical discharges (sparks). The material removal from the workpiece occurs by a series of rapidly, electrochemical machining Electro chemical machining is a method of removing metal by an electrochemical process. It is normally used for mass production and is used for working extremely hard materials or materials that are difficult to machine using conventional methods. Its use is limited to electrically conductive materials; however, this includes all metals. ECM can, electron beam machining, photochemical machining Photochemical machining , also known as photochemical milling or photo etching, is the process of fabricating sheet metal components using a photoresist and etchants to corrosively machine away selected areas. This process emerged in the 1960s as an offshoot of the printed circuit board industry. Photo etching can produce highly complex parts with, and ultrasonic machining, the word "conventional machining" can be used to differentiate the classic technologies from the newer ones. The term "machining" without qualification usually implies conventional machining.
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Gloucester Daily Times
The Gloucester High School program includes 147 students in machine shop , electrical, carpentry, and automotive shop programs. The steering group study, ...
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The concept for a program originated with CTM, a precision engineering . machine shop. located in Frankfort. CTM also donated more than $38000 worth of equipment to assist in getting the program off the ground. Name (required) ...
Q. small aersopace machine shop (about 50 people)
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A. Employment agency.
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