Gear is perhaps among the earliest materials that humans have used. They are found in almost all modern machinery. To resist the harsh operating circumstances, gears must be well-built, reliable, extremely efficient, and durable. Gears must be free from stress and strain to avoid failure, which could lead to ᴅᴀɴɢᴇʀᴏᴜs conditions. In order to meet all of these demands, the manufacturing of gears has developed into a highly specialized industry. One of the trickiest ᴍᴇᴛʜods for cutting metal is this one.
Depending on the parameters, different materials may be used to make gears. While non-ferrous materials like plastic and composites are employed in some applications, steel is the material that is most frequently used in others.
Gears are often made of steel, the most common material, as well as various non-ferrous materials including plastic and composites. According to the design requirements, the gear material should possess the following properties: a high tensile strength to resist failure under static loads, a high endurance strength to withstand dynamic loads, a low coefficient of friction, and good manufacturability.
Gears can be made using a variety of ᴍᴇᴛʜods, including casting, forging, extrusion, powder metallurgy, and blanking. Among these, machining is the production ᴍᴇᴛʜod that is most frequently used. The two further subcategories of gear machining are gear producing and gear form-cutting.
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Video resource: THD TV