Development of an Engine Block Polishing Machine Using Locally Sourced Material

The design of a cylinder bore-type polishing machine from a locally sourced material is presented in this paper work. Polishing of an engine block cylinder is necessary after undergoing boring operation to eliminate uneven surface of the cylinder wall. The polishing machine is powered by an electric motor of 1 H.P, the motor transfers torque to the pulley with the aid of a belt drive. A pair of polishing stone is provided with a movable base coupled to the rotating shaft which has a stopper that determines the vertical length at which it travels. The threaded adjuster was incorporated to determine the width of the polishing stone. An inclined iron bar feeds the shaft into the cylinder bore. Thus, the polishing cylinders are moved along with the base and rotated by the actuation of the rotary drive motor for smoothing the engine cylinder with the aid of abrasives. The application of this machine will eliminate manual methods, reduces the operation time, human effort and enhances smooth polishing accuracy.