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GEAR HOBBING PROCESS

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(32) Rishabh Jadhav,  (33) Sakshi Jadhav,  (45)Ameya Joshi,  (46) Ranbeer Kadam,  (47) Sonal Kadam Guide: Dr. Ramkrishna Bharsakade Hobbing On a hobbing machine, a unique kind of milling machine, hobbing is a machining operation used to cut gears, splines, and sprockets. Fig: 1              Through a series of cuts performed with a cutting device known as a hob, the gear's teeth or splines are gradually carved into the material (a flat, cylindrical piece of metal) Working Of Gear Hobbing The process of Gear hobbing, the gear is cut by a generating process in which the gear blank and the cutter  is rotated at the same time along with a fixed gearing ratio between hob and gear blank. Gear blank is fed into the revolving hob throughout this procedure until the necessary depth is obtained. Until all of the teeth are formed, the hob is fed through the blank's face. When hobbing a spur gear, the hob teeth are positioned parallel to the blank's axis of rotation. The axis of the
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Flywheels

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32: Sakshi Jadhav, 33: Rishab Jadhav, 45: Ameya Joshi, 46: Ranbeer Kadam, 47: Sonal Kadam  Guide: Prof. Rajkumar Bhagat   Flywheels A flywheel serves as a reservoir when used in machines, which stores energy during the period when the supply of energy is more than the requirement and releases it during the period when the requirement of energy is less than the supply. For example, the energy developed in the internal combustion engines during expansion or power stroke is much more than the engine load, and no energy is developed during suction, compression, and exhaust strokes in the case of four-stroke engines and during compression in two-stroke engines. It stores the energy when the supply is more than the requirement and releases when the requirement is more than the supply. In machines where the operation is not continuous like punching machines, shearing machines, riveting machines, crushers, etc., the flywheel stores energy from the power source during the greater portion of
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BOUNDARY LAYER

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          33: Komal Jogdand ,  34: Ameya Joshi ,  35: Ranbeer Kadam ,  36: Sonal Kadam ,  37: Viraj Kadlag Guide: Prof. Nitin Borse   BOUNDARY LAYER Fig. 1: Laminar and Turbulent Flow Introduction: When a real fluid is flowing through a solid object, the particles of fluid tend to adhere to the boundary. This gives rise to no slip condition. This means that the velocity of fluid near the boundary would be same as boundary of object. If the object is stationary then the velocity of fluid flowing near the boundary has zero velocity. As we go further from the boundary condition the velocity of fluid increases which results in variation of velocity which give rise to velocity gradient. Let’s assume the velocity of free stream is U in direction of normal to boundary. This variation of velocity occurs in narrow region near to solid boundary. This narrow region is called the boundary layer. The theory dealing with the study of the boundary layer is called boundary layer theory. According
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