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There are several processes of making gears or making gear teeth on various components like casting, forging, extrusion, drawing, thread rolling and powder metallurgy, among others. Blanking of sheet metal cam also be used for making thin gears, such as those used in mechanical watches, clocks and similar mechanisms. Plastic gears can be made by such processes by injection molding and casting.<br>Gears can be small as those used in watches or as large as 9m in diameter, for rotating mobile crane super structures. The dimensional accuracy and surface finish required for gear teeth depend upon the intended use. Poor Gear tooth quality contributes to inefficient energy transmission, increased vibration and noise and adversely affects the gear’s frictional and wear characteristics. For example: submarine gears has to be of superior quality so as to reduce the noise levels, thus helping to avoid detection.<br>
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Gear Blank Manufacteres in India
Introduction There are several processes of making gears or making gear teeth on various components like casting, forging, extrusion, drawing, thread rolling and powder metallurgy, among others. Blanking of sheet metal cam also be used for making thin gears, such as those used in mechanical watches, clocks and similar mechanisms. Plastic gears can be made by such processes by injection molding and casting. Gears can be small as those used in watches or as large as 9m in diameter, for rotating mobile crane super structures. The dimensional accuracy and surface finish required for gear teeth depend upon the intended use.
Methods of making Gear Teeth Starting from cast gear blank, there are two basic methods of making gear teeth: Form cutting and generation. Form Cutting In Form cutting gear tooth shape is reproduced by machining the gear blank around its periphery. The cutter travels axially along the length of a gear tooth and hence producing an appropriate depth to produce the gear tooth profile. After each tool is cut, the cutter is withdrawn, the gear blank is rotated and cutter proceeds to cut another tooth. This process continues until all the process have been machined. Broaching can also be used to gear teeth and in particular suitable for producing internal gear teeth.
Methods of making Gear Teeth Gear generating The cutting tool used in gear generating may be a pinion shaped cutter, a rack-shaped cutter, or a hob. 1. In the case of the pinion shaped cutter, it can be considered as one of the two gears in a conjugate pair, with the other being the gear blank. 2. On a rack shaper, the generating tool is a segment of a rack which reciprocates parallel to the axis of the gear blanks 3. A hob is basically a gear cutting worm, or a screw, made into a gear generating tool by a series of longitudinal slots or gashes machined into it to form the cutting teeth.
Methods of making Gear Teeth Gear generating The cutting tool used in gear generating may be a pinion shaped cutter, a rack-shaped cutter, or a hob. 1. In the case of the pinion shaped cutter, it can be considered as one of the two gears in a conjugate pair, with the other being the gear blank. 2. On a rack shaper, the generating tool is a segment of a rack which reciprocates parallel to the axis of the gear blanks 3. A hob is basically a gear cutting worm, or a screw, made into a gear generating tool by a series of longitudinal slots or gashes machined into it to form the cutting teeth.
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