Ergonomic design of computer numerical control lathe machine workstation

Sabri, Nur Hasrin (2014) Ergonomic design of computer numerical control lathe machine workstation. Project Report. Melaka, Malaysia, Melaka, Malaysia. (Submitted)

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Abstract

In manufacturing industry, the CNC lathe machine is widely used to improve productivity, repeatability and precision in machining process. However, the existing workstation of CNC lathe machine has contributed to unsafe working practices such as awkward postures, prolonged standing, repetitive movements and handling heavy loads which can lead to the muscle fatigue. In recognition the importance of these issues, the aim of this study is to improve the workstation design of CNC lathe machine. This can be achieved by redesigning the workstation according to ergonomics features required by the machinists. The ergonomics features were obtained through a questionnaire survey among 30 machinists. The machinists’ requirements were transferred into technical specifications by using House of Quality (HoQ). Then, the morphological chart was used to generate three conceptual designs of new workstation of CNC lathe machine. The final design of the workstation was drawn using CATIA software. The Rapid Upper Limb Assessment (RULA) was applied to analyze the working postures of machinists at the existing workstation and the redesigned workstation of CNC lathe machine. Based on the RULA analysis, the redesigned workstation of CNC lathe machine has improved the working postures of machinists. Hence, this study concluded that considering ergonomics features in the workstation design of CNC lathe machine contribute to safe working posture for the machinists.

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