DSGN06155 2019 CAD/CAM 202

Create solid models of complex mechanical parts.

Build 3D assembly models of mechanical mechanisms incorporating complex parts.

Design jigs, fixtures, work holding devices and grippers that are soundly based on good design practice.

Efficiently produce sets of working drawings for mechanical products that include the insertion of linear tolerances, geometrical tolerances and surface texture indications.

Read and interpret complex engineering drawings and produce drawings that conform to international standards.

Download CNC code files using a Direct Numerical Control (DNC) system to CNC milling machines.

Set up and machine parts on CNC milling machines.

This module will involve the use of a 3D mechanical modelling CAD system to generate solid models of parts and assemblies, and the drawings required to fully describe them.  It will also involve the use of CNC/CAM package to genrate CNC code and CNC machining using CNC milling machines.

Students will be timetabled for three hours per week in a computer aided design laboratory.

Students will also be timetabled for two hours per week in a CNC laboratory/workshop.

In addition to the normal lectures and practical classes, Designers, Programmers and/or Engineering Practitioners working in industry will be invited as guest lecturers and site visits to companies will be arranged, where possible.

Continuous assessment will involve the assessment of all assignments undertaken in class, design project activity completed independently and an end of term in-house assessment test.

Students who fail the module but satisfy the attendance requirements will be required to resubmit all continuous assessment assignments and/or undertake an repeat end of semester assignment test.

Part Modelling: Approach to ensure efficient creation of fully defined sketches, approach to ensure efficient creation of feature and parts, feature modification and analysis, part properties, parent/child relations.

Assembly Modelling: Inserting/adding components to an assembly, standard, advanced and mechanical assembly relations and mates, top-down assembly, in-context parts, moving components, external and reference files, assembly configurations.

Design: Jig and fixture types and functions, planes of movement, support, location and clamping principles, drill bushes, use of standard parts, template jigs, angle plate jigs, channel and box jigs, machining fixtures, welding jigs, power work holding, modular tooling, gauges, gripper/end-effector design, parallel, three-jaw, angle and radial grippers.

Drafting: Approach to ensure efficient creation of engineering drawings of complex mechanical products that conform to recognised standards and conventions.

Drawing Standards: Reading and interpreting engineering drawings of complex mechanical products and mechanisms, application of ISO drawing standards, production and presentation of engineering drawings to professional standards, inclusion of annotations, dimensions and linear tolerances, geometrical tolerances and surface texture indications.

CNC Machining: Overview of CAD/CAM packages, post processors, creation of tool paths for roughing and finish machining, tool selection, feeds and speeds, safe start-up and operation of CNC machine tool, machining of parts, introduction to manual programming.