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Fabrication of Beam Engine powered reciprocating Saw Report

Abstract :

In this project, the output of a Beam Engine is used to drive a reciprocating saw to cut timber. Here, instead of the rotating fly wheel, it is intended to have a rotating reciprocating saw. This rotating reciprocating saw is used to cut timber. Reciprocating saws driven with electric power are a common feature. But in places where electricity is scarce, or absent, it is difficult to operate these equipments. But since the Beam Engine powered saw runs on fuel, it can be operated even in places where electricity is totally absent. A beam engine is a design of stationary steam engine . A stationary engine is an engine whose framework does not move . Usually, a stationary engine is used not to propel a vehicle but to drive a piece of immobile equipment such as a pump or power tools . In a beam engine, the piston is mounted vertically, and the piston rod does not connect directly to the connecting rod, but instead to a rocker or beam above both the piston and flywheel. The beam is pivoted in the middle, with the cylinder on one side and the flywheel, which incorporates the crank, on the other. The connecting rod connects to the opposite end of the beam to the piston rod, and then to the flywheel .

A beam engine is a type of steam engine where a pivoted overhead beam is used to apply the force from a vertical piston to a vertical connecting rod. This configuration, with the engine directly driving a pump, was first used by Thomas Newcomen around 1705 to remove water from mines in Cornwall . The efficiency of the engines was improved by engineers including James Watt who added a separate condenser, Jonathan Hornblower and Arthur Woolf who compounded the cylinders, and William McNaught (Glasgow) who devised a method of compounding an existing engine. Beam engines were first used to pump water out of mines or into canals, but could be used to pump water to supplement the flow for a waterwheel powering a mill .

The rotative beam engine is a later design of beam engine where the connecting rod drives a flywheel , by means of a crank (or, historically, by means of a sun and planet gear ). These beam engines could be used to directly power the line-shafting in a mill . They also could be used to power steam ships .

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WORKING PRINCIPLE

When the piston in the cylinder reciprocates, it imparts an oscillating motion to the rocker arms, as shown in figure 1 on page 2. This oscillating motion of the rocker arm is converted into rotary motion by the crankshaft. The crankshaft, which is connected to the circular saw, makes the circular saw rotate. This rotary action of the circular wood saw is used to saw timber or wood blocks. There is a small table attachment for supporting the wooden block. The wooden block is placed on the table and pushed towards the rotating wood saw, which results in the sawing action. The main advantage of this machine is that it can be used in places where electricity is not economical or in places where electricity is absent.

Fabrication of Beam Engine powered reciprocating Saw Report

EXPERIMENTAL SETUP :

A beam engine mechanism is one where we use an overhead beam to create motion. Here we use a beam engine motion based assembly in order to achieve hack saw cutting motion using a circular cutting disc. Our system uses a motorized disc to drive a connector which is in turn connected to an overhead beam. The overhead bean has a connecting rod in turn connected to a mini hacksaw blade. When the motorized disc below is turned on the connecting arm starts reciprocating the overhead beam. This beam now heals achieve a back and forth cutting motion as required by the hacksaw blade.

WORKING OF RECIPROCATING HACKSAW

The objective of this work is to automate the conventional power hacksaw machine in order to achieve high productivity of work-pieces than the power hacksaw machine using pneumatic power. Pneumatic is a huge topic of science and engineering dealing with the mechanical properties of air. In our project we take this pneumatic and a hacksaw for cutting purpose, The pneumatic reciprocating high- speed hacksaw machine has an advantage of working in high pressure , the hacksaw used in this is reciprocate such that required shape can be cutted according to the requirement. The hacksaw is the metal cutting machine tool designed to cut metal by applying pneumatic pressure. Hacksaws are used to cut thin and soft metals the operation of the unit is simplified to a few simple operations involving a cylinder block and piston arrangement. There are numerous systems in hacksaw machine.
The hacksaw is the metal cutting machine tool designed to cut metal by applying pneumatic pressure. The machine exclusively intended for mass production and they represent fasten and more efficient way to cut a metal. Hacksaws are used to cut thin and soft metals the operation of the unit is simplified to a few simple operations involving a cylinder block and piston arrangement. There are numerous systems in hacksaw machine .The main function of pneumatic hacksaw is to cut thin and soft metals by pneumatic power.

ADVANTAGES

1. The cutting speed can be varied according to our needs by adjusting the timer.
2. It is portable.
3. It does not have any prime mover like electric motor.
4. Simple in construction than mechanical hacksaw.
5. It is compact one.
6. Less maintenance.

LIMITATION

1. Only smaller size and soft metal can be cut.
2. It is costlier than the mechanical hacksaw because of compressor unit.
3. Less efficiency when compressor to mechanical device.
4. Leakage of air affects the working of the unit.

APPLICATION

1. It is used in small scale industries and in large scale industries.
2. It useful when materials need to be cut in hazardous areas such as oil & gas refineries, chemical factories or oil rigs as well as dusty and wet environments where electric tools are not effective.
3. It is valuable tools in production environments such as pallet repair, shipbuilding or fiberglass workshops, because they will last longer than electric tools.

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