5.PNEUMATIC SLOTTING MACHINE - Copy.docx - CHAPTER-1 INTRODUCTION Slotting machines can simply be considered as vertical shaping machine where the


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CHAPTER-1 INTRODUCTION Slotting machines can simply be considered as vertical shaping machine where the single point (straight or formed) reciprocates vertically (but without quick return effect) and the work piece, being mounted on the table, is given slow longitudinal and / or rotary feed as can be seen. this machine also the length and position of stroke can be adjusted. Only light cuts are taken due to lack of rigidity of the tool holding ram for cantilever mode of action. Unlike shaping and planning machines, slotting machines are generally used to machine internal surfaces (flat, formed grooves and cylindrical). Shaping machines and slotting machines, for their low productivity, are generally used, instead of general production, for piece production required for repair and maintenance. Like shaping and slotting machines, planning machines, as such are also becoming obsolete and getting replaced by Plano-millers where instead of single point tools a large number of large size and high speed milling cutters are used 1
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CHAPTER-2 PNEUMATIC SYSTEMS A pneumatic system is a system that uses compressed air to transmit and control energy. Pneumatic systems are used in controlling train doors, automatic production lines, mechanical clamps, etc (Fig. 1). (a) Automobile production lines (b) Pneumatic system of an automatic machine Fig: No 2.1 Common pneumatic systems used in the industrial sector (a) The advantages of pneumatic systems: Pneumatic control systems are widely used in our society, especially in the industrial sectors for the driving of automatic machines. Pneumatic systems have a lot of advantages. (i) High effectiveness: Many factories have equipped their production lines with compressed air supplies and movable compressors. There is an unlimited supply of air in our atmosphere to produce compressed air. Moreover, the use of compressed air is not restricted by distance, as it can easily be transported through pipes. After use, compressed air can be released directly into the atmosphere without the need of processing. (ii) High durability and reliability: Pneumatic components are extremely durable and cannot be damaged easily. 2
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Compared to electromotive components, pneumatic components are more durable and reliable. (iii) Simple design: The designs of pneumatic components are relatively simple. They are thus more suitable for use in simple automatic control systems. (iv) High adaptability to harsh environment: Compared to the elements of other systems, compressed air is less affected by high temperature, dust, corrosion, etc. (v) Safety: Pneumatic systems are safer than electromotive systems because they can work in inflammable environment without causing fire or explosion. Apart from that, overloading in pneumatic system will only lead to sliding or cessation of operation. Unlike electromotive components, pneumatic components do not burn or get overheated when overloaded.
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