Fabrication and analysis of grinding jig for bevel end pipe joint to reduce vibration

Zahari, Muhammad Fitri (2021) Fabrication and analysis of grinding jig for bevel end pipe joint to reduce vibration. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

	Text (24 Pages) Fabrication and analysis of grinding jig for bevel end pipe joint to reduce vibration.pdf - Submitted Version Download (1MB)
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Abstract

Bevelling a pipe end for a welding joint usually uses the hand grinder, and operators tend to operate it manually. In this situation, the grinder's vibration will affect human health, such as a disease called Hand Arm Vibration Syndrome (HAVS). It is a disease caused by exposure to vibrating tools for a longer time. Thus, it is crucial to avoid this vibration from the grinder transmitted to the human body while operating the grinding machine. Fabrication of a jig and fixture is the aim of this project. The fabricated jig and fixture can reduce the grinder's vibration, which neglects the use of two hands when bevelling from holding a pipe and grinder simultaneously into just holding a pipe. The jig and fixture still produce a vibration, but it is less value of the vibration absorption toward the human body, ensuring workers' safety is secure. The jig and fixtures were fabricated in the workshop because there have accessible machines. Jig and fixture were fabricated using manufacturing processes, such as machining, joining, welding, and drilling. After all the parts were done with fabrication, the assembly process was done to ensure the jig was working as planned before analyzing the project. An analysis was obtained by reducing the vibration produced from the grinder machine exposed to the human body, then comparing vibration with a manual grinder. Then, the accuracy of the bevel angle produced when using the fabricated jig and fixture was measured. A hand-arm vibration meter was used to analyze the jig's vibration on the human body, proving that vibration was reduced from 2.5184 m/s² to 1.8408 m/s² for manual bevelling. The jig and fixture were successfully extending the period of use for vibrating tools from reaching the vibration limit that can endanger the user. For the bevel angle analysis, a bevel protractor was used to check the bevel angle at the bevelled pipe as stated at the jig before operating. This jig is useful for the operator in daily use of grinders such as the oil and gas industry, where the bevel pipe process is done every time the welding pipe process is needed.

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