Sheet metal parts are characterized by its complicated shapes. Computer aids for Sheet metal forming operations are conducted close to the failure limit and therefore, small changes in conditions and properties of material can cause large changes in failure rates. Before deciding the forming process and tools, the tool designer has to determine whether the
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NC machine tool by means of prepared program, which consists of blocks, or series of numbers, is know as numerical control (NC). In manufacturing of more complicated parts, the system has to calculate automatically additional data points, which is done by means of an interpolator The capability of changing the programs provides the advantage of
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Types of fixtures are used to hold the workpiece during machining operations. The name is derived from the fact that a fixture is always fixed or fastened to a machine in the fixed position. It does not contain arrangements for guiding the tool. The use of fixture becomes essential when the components to be produced
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The guide pins or guide post design provide a good alignment between die shoe and punch holder. The guide bushings are mounted in the punch holder and slide over the guide pins. Figure shows the arrangement of guide pins and bushing of the die set. For the average range of die sets, the diameter of
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A gear trains is two or more gear working together by meshing their teeth and turning each other in a system to generate power and speed. It reduces speed and increases torque. To create large gear ratio, gears are connected together to form gear trains. They often consist of multiple gears in the train. Gear
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A types of bearings is a device to allow constrained relative motion between two or more parts, typically rotation or linear movement. The bearings are used in variety of machine elements to guide and allow the relative motion between the parts with minimum friction and maximum accuracy. Types of Bearings Bearings may be classified broadly
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When a metal wire is heated the resistance increases. So, a temperature can be measured using the resistance of a wire. The RTD incorporates pure metals or certain alloys that increase in resistance as temperature increases and, conversely, decrease in resistance as temp decreases. RTDs act somewhat like an electrical transducer, converting changes in temperature
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A tire pressure sensor is a small programmable electronic device, located in the pressurized pocket made by a wheel and tire, that constantly measures the air pressure inside the tire. The tire pressure sensor transmits that information via low-frequency radio to the vehicle’s onboard computer and, if the car has one, to a corresponding display
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Types of jig and fixture There are so many types of jig and fixture. It is difficult to classify them into a standard system. However, depending upon their construction and method of operation, jigs can be broadly classified as follows: Boring jig Drill jig Template jig Plate jig Sandwich jig Latch or leaf jig Channel
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Progressive Die These progressive die are designed to perform two or more operations at different stages every time when the ram descends. The stock strip is advanced through a series of stations that perform one or more distinct die operations on the workpiece. The strip must move from the first through each succeeding station to
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