DESIGN AND FABRICATION OF FOUR WAY HACKSAW MACHINE
Abstract : Objective of the project is to fabricate a motorized high speed 4-way hacksaw machine and to automate and to modify the conventional power hacksaw machine in order to achieve high productivity of work-pieces than the power hacksaw machine using cam mechanism. The operator need not measure the length of the work-piece that is to be cut and to load and unload the work-piece from the vice each time after a piece has been cut. This machine is built with the 4 hacksaw machines such that tall the machines are operated simultaneously with the help of a motor and cam mechanism.
• The problem of cutting-off material to size is common to practically every industry.
• Preliminary investigations by the author have revealed that existing blade testing methods were not independent of the machine characteristics, which could contribute to one of the reasons for the inconsistency in the test data.
• Whilst these alternative processes are frequently, quicker than power hacksawing, their costs are in many applications higher.
• Whilst the impact of these alternative processes on the application of power hacksawing cannot be denied there remains a significant field of application for power hacksawing which is likely to remain unchallenged.
• A factor of prime interest to manufacturers is that, if the costs of power hacksawing can be reduced by developing the blade and the saw machine, the potential field of application will be widened.
• More number of moving parts.
• Must be handled with care.
• The loading and unloading of the work pieces must be done manually.
• This project consists of single phase vertical electric motor rigidly placed at the centre of metallic foundation provided. The shaft of gearbox rotates at 80- 90 rpm with the motor power 1 HP.
• The circular disc is mounted on the shaft of the motor with the help of key and key slot arrangement.
• The eccentric point on the plane of the disc is provided such that the desired cutting stroke is achieved. One end of each connecting rod is pivoted at this eccentric point by the use of the suitable bearing. Another end of each rod is connected to the hacksaw blade fame with the help of a universal joint to get vertical and horizontal Degree of Freedom of rotation for the proper cutting operation.
• The hacksaw frame slides on the guideways provided. When the motor is ON and disc starts rotating, due to the reciprocating motion of hacksaw frame the metal rod is cut which is firmly fixed in a vice.
• Simple in construction.
• Easy to fabricate.
• The components used for the fabrication of the are easily available.
• Repairing and replacing is not a difficult task.
• Multiple work pieces can be cut simultaneously.
• The time taken for cutting operation is less.
• Increased productivity.
|