Pneumatic Reciprocating Power Hacksaw Machine Project
Pneumatic Reciprocating Power Hacksaw Machine Project report
Abstract: As we know that in large manufacturing industries, the cuttingoperation is very requiredfor raw material, for this purpose they use conventional hacksaw machine for cutting operation. In that type of machine single piece can cut at a time by using an electric motor. Also,one laborutilizesfor same. So it is time-consumingand comparatively costly. Therefore we have manufactured a four-wayhack-saw machine which is used for cutting job simultaneously, this four-wayhack-saw machine usessingle motor four cutting job at thesametime while in conventional hack-saw machine single motor is used for cutting one job only.Conversion ofrotary motion of dc motor into reciprocating motion is obtained by using the eccentriccam. By making such type of machine, cutting operation time as well as laborworking time can be reduced. Since such a hack-sawmachine gives more productivity than a conventional cutting hack-saw machine, it can be used in manufacturing industries where automation is required. It can be also used in industries where laboravailability is less. In this present work, we manufactured a model of four-wayhacksaw machine, so we uselight duty of structural parts and crank mechanism, the capacityof the electricmotor is also very low. But in future,if we want to use such type of machine in industry, we can manufacture it by using heavy duty of body structure and all other required parts. In present condition many electrically operated power hacksaw machines of different companies with different specifications are available for the use in the shopfloor. These machines are so precise that they can cut metal with minimum time made up of different materials but they have one and major disadvantage that those are ableto cut a singlepiece of the barat a time. For industries to achieve the mass production, it is necessary to cut metal bars with high rate. So it is impossible to depend upon conventional single frame power hacksaw machines and need the improvement in technology and design of such machines. By using this four-wayhacksaw machine the four metal bars can be cut simultaneously to get the high-speedcutting rate and to achieve mass production for maximum profit in manufacturing industries. As this machine overcomes all the limitations and drawbacks of conventional hacksaw machines, it is also helpful for small-scaleindustries due to its simple working and operating conditions along with its compatibility, efficiency and affordable price. The setup of the four-wayhacksawmachine is very simple, it operates with the mechanismof eccentric cam disc arrangement. The discrotates with DC motor, the rotarymotion of the wheelis converted into the reciprocating motion of the cutting tool (hacksaw). This reciprocating motion is used to obtain the linear motion of blades and material is cut. The size and shape of this setup aresmall. The bedis provided for placing the workpieceto be cut. A low power DC motor is required for its operation. Length of the crankand connecting rod is selected using trial and error method. The motionof hacksawis guided by guiding rods placed over the hacksawframe. The vertically downward motion is occurred due to self-weight of the frame, so it can be called as gravity feed hacksaw.