UNKNOWN LOAD MEASUREMENT IN HACK SAW MACHINE

Avilasha B G, Ramakrishna D S

Abstract: The measurement of load acting on machines and structures is important from many considerations. Accurate weighing of commodities, applying known load on specimens being tested for strength, safe operation of material handling equipment such as crane, determination of operating loads are some examples. When the load or forces are to be measured, a load cell is to be placed in the load path. Many times, it is not feasible to insert the load cell in the load path. In such cases, using the machine member themselves for measuring load will be advantageous. This dissertation work involves study Hack Saw machine where the load measurement is essential. Investigation is carried out to study the feasibility of using the member of the machine itself as load sensing member. The load measurement involves identification of critical component in the load path. While the process of load measurement is not straightforward in case where the known load is cannot be applied, inverse FEM is to be adopted for the case where applied load is not known. Once the critical component in the load path is identified, electrical resistance strain gauges are mounted in an appropriate fashion to get maximum output for an applied load. The dynamic strain was recorded using the LABVIEW software. The finite element analysis done for hacksaw machine with proper boundary conditions and the strain data are taken for series of loads and then these values are compared with the experimental strain value and the unknown load was estimated. Keywords: load, strain gauge, Hack Saw Machine, load meter. FEM

Keywords: load, strain gauge, Hack Saw Machine, load meter. FEM

DOI: https://doi.org/10.15623/ijret.2015.0401028