Investigation Of Machining Cost Modelling Based On Product Drawing

Pahorudin, Nor Aisyah (2019) Investigation Of Machining Cost Modelling Based On Product Drawing. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Current developments of ICT technologies in this era enables a new manufacturing paradigm known as Cloud Manufacturing (CM). Flexible and dynamic are the important aspects for the future in manufacturing processes in order to cater to customer demands, for example in a large series of production or mass customization. CM enables manufacturing as a service concept so that product owner can fulfil customer demand using available capital resources around the world without having to make a capital investment. One of the important elements to enable CM is the ability to match between product owner requirement and physical resource provider’s capabilities instantaneously. This, include the pricing and quotation. Ability to provide instantaneous quotation based on product drawing and specification is still a gap in CM environment. There is also no standard parameters or factors set to be considered in the machining cost estimation model. This study aims to establish a machining cost model according to the important factors that should be considered which based on the product drawing. The model was developed based on the available literature in this body of knowledge. The proposed model was validated using a case-study of a product to be fabricated using CNC Makino F5 3-axis vertical machining centre. The machining cost of the product was calculated and compared to the quotations obtained from the machining service providers. One sample t-Test was performed to compare the cost calculated using the proposed models to the machining cost quotations. The developed machining cost model consists of few cost components. These cost components are electrical consumption, coolant usage, lubricant oil usage, tools usage, machine cost and labour cost. The product for this case study was modelled using Catia V5 Software. The machining time was estimated using CAM simulation. Based on the proposed model the machining cost is RM87.15. This calculated cost was compared to the seven quotations received from machining service providers using one sample t-Test method. The p-value of the test is 0.181. This implied that, statistically the calculated cost is within the range of quotations received with 95% CI.

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