Technological innovation and digital tools: CAD/CAM, ICT and product development
What the exam tests
The product development cycle, CAD/CAM/CIM, simulation, ICT, and how innovation is protected and managed.
Digital design chain
CAD: 2D drafting and 3D parametric modelling (sketch → constraints → features → assembly → drawing). Parametric models update when dimensions change. CAM converts CAD geometry into toolpaths; post-processing produces G-code. CIM integrates CAD, CAM, ERP and production data. PLM manages the whole lifecycle. Simulation: FEA for stress/thermal, CFD for flow, kinematic simulation for mechanisms. Rapid prototyping includes FDM, SLA, SLS and metal additive manufacturing. A digital twin links a physical asset to a model for monitoring.
Innovation and product development
Stages: idea, feasibility, design, validation, launch. Tools include QFD (house of quality), FMEA, value analysis, TRIZ, benchmarking and design thinking. Innovation can be incremental or radical. Intellectual property: a patent requires novelty, inventive step and industrial application, and lasts 20 years; other forms are utility models, trademarks, design registration, copyright and trade secrets.
ICT and industry
IoT sensors, cloud data, big data analytics, cybersecurity, ERP/MES. Automation includes robots, PLCs, CNC and automated guided vehicles. Standards and interoperability matter.
Worked example
A team redesigns a bracket. CAD mass properties give volume 120 cm³; material density 2.7 g/cm³ gives mass 324 g. FEA shows maximum von Mises stress 180 MPa against a yield of 240 MPa, safety factor 1.33. Topology optimisation removes 22% of the volume, reducing mass to 253 g and raising stress to 225 MPa, safety factor 1.07. That is too low, so the team adds a rib and re-runs the analysis to reach 1.5.
Traps
- Confusing CAD model geometry with manufacturing tolerances.
- Treating a patent as automatic and worldwide.
- Using FEA without checking mesh convergence and boundary conditions.
- Assuming 3D printing is always cheaper than injection moulding.
- Ignoring cybersecurity and data ownership in connected products.