Master of Engineering Computer-Aided Manufacturing Flashcards
7 cards from real ME or MEng Master of Engineering practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Master of Engineering Computer-Aided Manufacturing flashcards as text
In DMLS (Direct Metal Laser Sintering), residual stresses are primarily managed by:
Answer: Optimizing scan strategy and applying post-build stress relief heat treatment
Alternating scan patterns and stress relief annealing after printing mitigate the thermal gradients that cause residual stresses in DMLS parts.
What is the primary advantage of 5-axis CNC machining over 3-axis machining?
Answer: It allows the tool to maintain optimal cutting angle to complex curved surfaces without repositioning
5-axis machines tilt the tool or part continuously, maintaining ideal cutting geometry on complex surfaces in a single setup.
In a manufacturing context, which lean tool is used to map the flow of materials and information from supplier to customer to identify waste?
Answer: Value Stream Mapping (VSM)
Value Stream Mapping visualizes all steps in production flow, distinguishing value-added from non-value-added activities.
Which cutting tool material offers the highest hardness and heat resistance for dry high-speed machining of hardened steels?
Answer: Cubic Boron Nitride (CBN)
CBN is second only to diamond in hardness and retains its properties at high temperatures, making it ideal for hard steel machining.
In CAD/CAM integrated manufacturing, what is the role of a Post-Processor?
Answer: It translates generic toolpath data (CLDATA) into machine-specific G-code
A post-processor converts CL (cutter location) data from CAM software into the specific G-code dialect required by a particular CNC controller.
What does 'Design for Manufacturability (DFM)' primarily aim to achieve?
Answer: Reducing production cost and defects by designing parts that are easier to manufacture
DFM integrates manufacturing constraints into the design phase to minimize cost, simplify assembly, and reduce defect rates.
In injection molding simulation, sink marks on a part surface are most directly caused by:
Answer: Insufficient cooling time leading to subsurface shrinkage
When thick sections cool slowly and the outer skin solidifies before the core, subsurface shrinkage pulls the surface inward, creating sink marks.