Consideration of hand grip strength in the hand grinder handle to improve subjective comfort and work productivity

Chin, Ee Ling (2018) Consideration of hand grip strength in the hand grinder handle to improve subjective comfort and work productivity. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

In the world of globalization, the innovation of hand tools is important due to the increasing of demand in competitive manufacturing environment. Hand tools should be designed ergonomically to ensure users could use the tools with minimum effort to perform maximum operation. In manufacturing industry, a hand grinder is the common tool that used in various fabrication tasks. However, many users faced difficulties such as unable to grip the hand grinder firmly, larger size or weight of hand grinder, inappropriate design of support handle and faced awkward posture in the wrist when overexposure to the existing design of hand grinder handle. It would influence the subjective comfort and work productivity of the user. Therefore, the aim of study is to design and fabricate a high fidelity prototype of hand grinder handle for the improvement of subjective comfort and work productivity during grinding process. In order to achieve the objective, users requirements were translated and modified to technical parameters through House of Quality (HoQ). Meanwhile, concept screening method was applied to select the best concept of hand grinder handle and then sketched with SOLIDWORKS software. A high fidelity prototype of hand grinder handle was fabricated by using the PVC pipe. The existing grinder handle design and proposed handle design developed by this study were compared to evaluate the effectiveness. In order to meet the entrepreneurial requirement, the profitability of the proposed hand grinder was evaluated using Return on Investment (ROI). The result of this study illustrated that a high fidelity prototype of hand grinder handle was able to improve comfort level and work productivity of users.

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