GATE ME 2023 Set 1 — Question 55
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Metrology, CIM & Additive Mfg → Computer Integrated Manufacturing → Additive Manufacturing & 3D Printing
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Question
A solid part (see figure) of polymer material is to be fabricated by additive manufacturing (AM) in square-shaped layers starting from the bottom of the part working upwards. The nozzle diameter of the AM machine is mm and the nozzle follows a linear serpentine path parallel to the sides of the square layers with a feed rate of mm/min. Ignore any tool path motions other than those involved in adding material, and any other delays between layers or the serpentine scan lines. The time taken to fabricate this part is ___________ minutes.
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Solution
The total volume of the part is the sum of the volumes of the three blocks:
.The nozzle diameter is mm. Assuming the layer thickness is equal to the nozzle diameter ( mm), the cross-sectional area of the deposited bead is .The feed rate is mm/min.
The volumetric flow rate of material deposition is .The total time taken is:
.
.The nozzle diameter is mm. Assuming the layer thickness is equal to the nozzle diameter ( mm), the cross-sectional area of the deposited bead is .The feed rate is mm/min.
The volumetric flow rate of material deposition is .The total time taken is:
.
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