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17054714-Pneumatics-Part-I

17054714-Pneumatics-Part-I - PneumaticsPartI By Amaren...

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7/3/2009 1 Pneumatics Part I Compressed air systems By Amaren P. Das M.Tech (SYSCON) IIT B General methods of material handling Clamping , shifting, Positioning , Orienting General application Packing , Filling, Metering, Stacking , stamping etc. Machining and working D illi Milli F i S i NFC TS 2009 Pneumatics APDas 2 Drilling , Milling, Forming, Sawing
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7/3/2009 2 Availability Everywhere, unlimited quantity Transport Easily be transported over pipelines over long distance Explosion proof No risk of explosion or Fire Cleanliness Un lubricated exhaust air are clean Speed NFC TS 2009 Pneumatics APDas 3 Fast working medium …. Enables high working speed Temperature Insensitive to temperature fluctuations Preparation Dust and condensate should not be present Compression It is not always possible to achieve uniform and constant piston speed with compressed air Force Requirement Pressure up to 8 bar only NFC TS 2009 Pneumatics APDas 4 Maximum force limited to, 40,000 to 50,000N Noise Level Exhaust air produce noise
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7/3/2009 3 Pneumatic control circuit Signal flow Symbols of hydraulic circuit Actuators Valves Direction control valve Flow control valves Pressure control valves Combination valve NFC TS 2009 Pneumatics APDas 5 Air preparation (FRL units) Pumps Piping & distribution NFC TS 2009 Pneumatics APDas 6
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7/3/2009 4 NFC TS 2009 Pneumatics APDas 7 NFC TS 2009 Pneumatics APDas 8
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7/3/2009 5 NFC TS 2009 Pneumatics APDas 9 How single acting cylinder works NFC TS 2009 Pneumatics APDas 10
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7/3/2009 6 How Double acting cylinder Works NFC TS 2009 Pneumatics APDas 11 A single acting cylinder of 25 mm diameter is to clamp a component when a push button is pressed. As long as the push button is pressed the cylinder is to remain in the clamped position . When the push button is released the l i t t d NFC TS 2009 Pneumatics APDas 12 clamp is retracted
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7/3/2009 7 A piston of a double acting cylinder is to advance when the 3/2 way roller leaver valve 1s2 is actuated and the push button of 3/2 way valve 1S1 is actuated. If either of the two is released, then the cylinder returns to initial position. How to do it with out using NFC TS 2009 Pneumatics APDas 13 and valve ?
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