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Volume 9 Issue 3 - January 2018

  • 1. Optimization of aa7075 autonomous underwater vehicle (auv) propeller front hub pre-form sizing for flash-less cold forging process – a fe study

    Authors : V.komalapur, H.m.t.khaleed, H.udayaprasanna, Abdulgafur A

    Pages : 140-147

    DOI : http://dx.doi.org/10.21172/1.93.24

    Keywords : Cold forging, AUV, AA7075, under-fill, flash, AFDEX, front hub

    Abstract :

    Numerical techniques based on finite element method have made inroads into wide areas of engineering applications that includes manufacturing and structural design. The concept of numerical experimentation has drawn the attention of researchers as well as industry personnel to evolve as development. The adoption of finite element tool in manufacturing has proved to be a cost-cutting strategy as well as a means to minimize the product lead time. The current advancements in manufacturing by emphasis on enhanced product variety within a short delivery time making it inevitable for manufacturer to innovate on the product. Manufacture of autonomous underwater vehicle (AUV) propeller owing to complex hub and blade design poses challenging tasks to researchers who aim to increase thrust. Present work investigates cold forging process adopted to produce propeller hubs that involve flash and under-filling as two critical problems can be efficiently solved by appropriate design and optimization of pre-form. Finite element analyses applied to AUV propeller have been successful in accepting of metal flow, work optimization and die stress in forming process. The numerical simulation on AFDEX 2014 SP0 and geometrical modeling of pre-form and dies were performed with SOLIDWORKS. The AA7075 pre-form with AISI D2 die material for front hub considering four pre-forms of various dimensions were investigated for minimization of flash and under-fill. The reported work revealed that pre-form geometry had an important role to play in deciding the dimensional accuracy of the cold formed front hub. The case-III , 28.5 mm diameter pre-form produced improved finished product as well as reduced the induced stress on die and process load required.

    Citing this Journal Article :

    V.komalapur, H.m.t.khaleed, H.udayaprasanna, Abdulgafur A, "Optimization of aa7075 autonomous underwater vehicle (auv) propeller front hub pre-form sizing for flash-less cold forging process – a fe study", Volume 9 Issue 3 - January 2018, 140-147

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