Ergonomic Design Of Adjustable Height Standing Platform For Manual Milling Operation

Lee, Ren Xie (2019) Ergonomic Design Of Adjustable Height Standing Platform For Manual Milling Operation. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Users of manual grinding machines suffer from ergonomic-related injuries due to their physical size mismatches and machine specifications. The main purpose of this study is to produce a standing platform prototype that has an adjustable height feature. In addition, this study also measures the maximum strength of the hand torque and the wrist of the user of the blender machine at three different heights. Hand torque is measured at shoulder height, eye height and heights above the head. While the torque is measured at the waist height, elbows and shoulder height. The maximum strength of hand torque and wrists was measured using the Mark 10 Series R52 M3i Model installed on the test rig. Hand torque measurements are measured at shoulder height, eye height and overhead height in both directions while wrist torque measurements are measured at waist height, elbow height and shoulder height in both clockwise. An interview and observation form is conducted to determine the needs of the blender machine user before it is translated into some concept sketches. The 'House of Quality' method has been used to transform the user's requirements of the blender machine into engineering requirements. Whereas the 'Pugh Method' check method has been applied to determine the concept of the best stand platform. To determine the economic feasibility and possible costs, the Return on Investment (ROI) is assessed. The results showed that the maximum strength of hand torque (905.6667 Ncm) and the maximum strength of the wrist torque (514.666667 Ncm) was at shoulder height. This study concludes that the prototype adjustable stand platform is able to provide the user with the appropriate height to gain maximum strength during manual grinding operations.

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