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MANUFACTURING PROCESSES

Manufacturing is the craft used to "make or process (a raw material) into a finished product, especially by means of a large-scale industrial operation." Webster's adds: manu-facturing can include "making of goods and articles by hand. . ." or by machinery, and large-scale manufacturing may include "division of labor." There are five basic manufacturing processes: 1) changing the shape of a raw material, 2) machining parts to a fixed set of measurements, 3) attaining a desired surface finish, 4) joining parts or materials, or 5) altering one or more materials' properties. Each classification divides into turning, rolling, hot or cold forming, or other operations to span sewing zippers into leather purses, stapling lath berry baskets, and mass-producing B-2 bombers.

Manufacturing implies the making of metal products, but nonmetallic materials are also used in manufacture, such as plastics, ceramics, wood, and natural and synthetic fibers.

Material Properties and Product Attributes

Schwartz's ten-chapter book addresses nothing but joints between metal parts, and it devotes portions of each chapter on metal joinery to the materials to be joined and their properties. Manufacturing, then, flows from the materials being worked and the products to result; one does not buy a drill press and then resolve to make automobiles.

Harris points out that more than two-thirds of the 110 (or so) elements found naturally or produced in the laboratory are metals, but only about a dozen are broadly usable. The limitations of the other 100 or so include "defective mechanical properties," brittleness, scarcity, high cost, and difficulty to impossibility of preparation or manipulation.

Compelling properties of the workable, durable metals range through: ease of manipulation, as for drawing into fine wire or pressing into complex shapes; high strength and hardness, as in structural beams, high-powered machinery, or rock-crushing ...

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MANUFACTURING PROCESSES. (1969, December 31). In LotsofEssays.com. Retrieved 09:00, March 28, 2024, from https://www.lotsofessays.com/viewpaper/1682336.html