Design and Fabrication of Crank Rocker Sheet Cutting Machine

ABSTRACT The design and fabrication of a sheet metal cutting machine using a crank rocker mechanism is highly effective for cutting sheet metals into equal and accurate dimensions. The crank–rocker mechanism is utilized to automate the cutting operation by converting rotary motion into oscillatory motion. In this system, continuous rotational motion from the motor is transmitted to the crank, which in turn drives the rocker arm. The oscillating motion of the rocker is used to operate the cutting tool. The sheet metal is fed manually or by a simple feeding mechanism and positioned accurately before each cutting stroke. The crank–rocker mechanism ensures smooth and controlled movement of the cutting blade, resulting in uniform and precise cuts. After completing the cutting stroke, the cutter returns to its original position due to the reverse motion of the rocker and the assistance of a spring mechanism. Thus, the use of a crank–rocker mechanism provides a simple, reliable, and cost-effective solution for sheet metal cutting with improved operational efficiency and accuracy. The oscillating motion of the rocker is used to operate the cutting blade. As the crank rotates, the rocker moves downward to perform the cutting stroke and then returns to its original Key words:crank–rocker mechanism, sheet metal, spring mechanism.