2D Computer Aided Design
This subtopic introduces essential 2D Computer Aided Design skills for blacksmithing, focusing on creating precise technical drawings that inform forging and fabrication. Learners will use industry-standard CAD software to translate artisan concepts into accurate plans, enabling efficient material usage, consistent replication, and seamless integration with modern manufacturing workflows. The practical application spans from small decorative items to large architectural metalwork, reinforcing the fusion of traditional craftsmanship with digital precision.
Assessment criteria
Topic Overview
The City & Guilds Level 3 Diploma in Blacksmithing is an advanced vocational qualification designed for individuals who have mastered basic forging techniques and wish to develop professional-level skills in creative and architectural blacksmithing. This diploma covers complex processes such as forge welding, tool making, and the fabrication of large-scale structural and decorative metalwork. Students will learn to interpret technical drawings, select appropriate materials, and apply heat treatment methods to achieve desired mechanical properties. The qualification emphasises both traditional craftsmanship and modern workshop practices, preparing learners for careers as professional blacksmiths, farriers, or metal artisans.
This diploma sits within the Manufacturing and Engineering sector, bridging heritage craft skills with contemporary engineering standards. It is ideal for those aiming to work in restoration, custom fabrication, or artistic metalwork. The course includes units on health and safety, business awareness, and client communication, ensuring graduates are not only skilled makers but also capable of running their own workshops. By the end of the programme, students will have produced a portfolio of work demonstrating competence in techniques like scrollwork, joinery, and finishing, alongside a major project that showcases their design and fabrication abilities.
Key Concepts
Core ideas you must understand for this topic
- →Forge welding: The process of joining two pieces of iron or steel by heating them to a high temperature and hammering them together. Requires precise temperature control and flux application to prevent oxidation.
- →Heat treatment: Techniques such as annealing, normalising, hardening, and tempering to alter the mechanical properties of steel. Understanding critical temperatures and cooling rates is essential for achieving desired hardness and toughness.
- →Tool making: Designing and forging custom tools like chisels, punches, and tongs. This involves selecting appropriate steel grades, shaping, heat treating, and sharpening to produce functional, durable tools.
- →Architectural blacksmithing: Creating structural and decorative elements such as gates, railings, and furniture. Requires skills in measuring, cutting, bending, and assembling complex geometries, often with scrolls, twists, and collars.
- →Material selection: Choosing the right type of steel (e.g., mild steel, carbon steel, or tool steel) based on the project's requirements for strength, ductility, and corrosion resistance. Understanding stock sizes and availability is also key.
Learning Objectives
What you need to know and understand
- Use associated IT, CAD hardware and operating systems, Use basic file management techniques and maintain health and safety requirements, Use and identify key components of the software relating to the 2D drawing environment, Use a range of viewing commands and set up the drawing space, Use drawing commands to produce shapes, Use the CAD software’s co-ordinate system to aid accurate drawing, Use hatch, text and simple dimensioning routines, Use basic editing commands and produce simple hard copies
Assessment Criteria
Key criteria assessors look for in your portfolio
- Award credit for demonstrating correct start-up and shutdown of CAD hardware/system, following all health and safety requirements for workstation ergonomics and electrical safety.
- Evidence of logical file management: appropriate file naming, saving in correct formats (e.g., .dwg, .dxf), and organised folder structures for version control.
- Accurate identification and use of the user interface components: ribbon/menus, toolbars, command line, status bar, and drawing area specific to 2D mode.
- Proficiency in viewing commands: zoom, pan, and regeneration; and correct setup of drawing limits, units (metric/imperial), grid, and snap settings for the project.
- Correct use of coordinate systems: absolute, relative, and polar entry methods to position entities with precision, evidenced by dimension verification.
- Creation of basic blacksmithing shapes (e.g., scrolls, tapered bars, punched holes) using line, circle, arc, polyline, rectangle, and polygon commands.
- Application of hatch patterns (e.g., ANSI/ISO standards) to represent sectioned metal, with appropriate scale and angle; text insertion with suitable fonts and sizes for annotations.
- Simple dimensioning routines: linear, aligned, radius, and diameter dimensions; correct placement, consistent style, and use of associative/dynamic dimensions.
- Effective use of editing commands: trim, extend, offset, move, copy, rotate, and mirror to refine designs, with layers used to organise object types (e.g., outlines, annotations, dimensions).
- Production of a scaled hard copy on appropriate paper size, complete with title block, border, and correct print settings (plot area, scale, lineweights).
Assessment Guidance
Guidance for achieving higher grades
- 💡Before starting any drawing, read the assignment brief fully to identify which specific CAD functions must be demonstrated for assessment criteria.
- 💡Develop a consistent routine: set up drawing environment (units, limits, layers, text/dimension styles) first, then draw, annotate, and finally layout for printing.
- 💡Master keyboard shortcuts for common commands (e.g., L for line, C for circle, TR for trim) to increase efficiency and reduce on-screen clutter during timed assessments.
- 💡Save incrementally with descriptive filenames (e.g., 'scroll_bracket_v1.dwg') and periodically export to backup formats; this also provides evidence of process for portfolio work.
- 💡Use the layout/paper space to compose prints: create viewports at correct scale, add a title block with your details, and plot preview before final output.
- 💡When dimensioning, employ associative dimensions and check them against known reference points to validate accuracy—this is critical for smithing fit-up tolerances.
- 💡In practical assessments, always demonstrate safe working practices from the start. Examiners look for correct use of PPE, proper handling of hot metal, and awareness of fire safety. A minor safety lapse can cost marks even if the finished piece is excellent.
- 💡When answering theory questions, use technical vocabulary accurately. For example, distinguish between 'annealing' (softening) and 'normalising' (refining grain structure). Refer to specific temperatures and cooling methods (e.g., 'cool in still air' vs 'quench in oil').
- 💡For the major project, choose a design that showcases a range of skills (e.g., forge welding, scrollwork, and tenon joints) but is achievable within the time limit. Submit clear working drawings and a step-by-step plan. Examiners reward thorough preparation and problem-solving during the build.
Common Mistakes
Common errors to avoid in your coursework
- Confusing relative and absolute coordinate entry, leading to misplaced geometry and inaccuracies in critical forging measurements.
- Failing to set units correctly at the start, causing scale mismatches when referencing traditional blacksmithing stock sizes (e.g., inches vs millimeters).
- Neglecting to use object snaps (endpoint, midpoint, intersection) for precise connections, resulting in gaps or overlaps that can ruin a forging joint layout.
- Overlooking regular saves and not creating backup files, with data loss disrupting iterative design refinement common in craft metalwork.
- Printing without checking scale or paper size: a hard copy intended for the forge floor may be too small to read or incorrectly scaled for template transfer.
- Applying hatch patterns without adjusting scale or angle appropriately for the component, leading to a visually confusing or non-standard representation.
- Forgetting to lock layers before editing other geometry, accidentally modifying reference or dimension layers and compromising drawing integrity.
- Misconception: Forge welding is just like brazing or soldering. Correction: Forge welding requires the base metals to reach a plastic state (around 1300°C) and be hammered together to create a solid-state bond. Unlike brazing, no filler metal is used, and the joint strength comes from diffusion of atoms across the interface.
- Misconception: Hardening steel makes it stronger and better for all applications. Correction: Hardened steel is brittle and can crack under impact. Tempering is necessary to reduce brittleness while retaining hardness. For tools like chisels, a balance between hardness and toughness is critical.
- Misconception: Blacksmithing is purely manual and doesn't involve modern technology. Correction: Professional blacksmiths use power hammers, hydraulic presses, plasma cutters, and CNC machines alongside traditional anvils and forges. Understanding both hand and machine techniques is essential for efficiency and precision.
Frequently Asked Questions
Common questions students ask about this topic
Pass / Merit / Distinction Evidence Checklist
How your portfolio evidence is graded for CITY AND GUILDS OF LONDON INSTITUTE 2D Computer Aided Design
Every vocational unit is marked against named criteria rather than an exam percentage. Your tutor's brief lists the exact codes for this unit — here is what each band is asking you to do.
Demonstrate baseline knowledge, accurate terminology, and core practical application.
Provide detailed analysis, structured explanations, and clear workplace reasoning.
Deliver thorough evaluation, original problem solving, and fully justified recommendations.
Before You Start
Prior knowledge that will help with this topic
- •City & Guilds Level 2 Diploma in Blacksmithing or equivalent experience in basic forging techniques (e.g., drawing down, upsetting, bending, and punching).
- •Understanding of ferrous metallurgy basics, including the difference between iron and steel, and the effects of carbon content on properties.
- •Competence in reading simple technical drawings and using measuring tools like callipers and squares.
Coursework AI Review
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Key Terminology
Essential terms to know
- Use associated IT, CAD hardware and operating systems, Use basic file management techniques and maintain health and safety requirements, Use and identify key components of the software relating to the 2D drawing environment, Use a range of viewing commands and set up the drawing space, Use drawing commands to produce shapes, Use the CAD software’s co-ordinate system to aid accurate drawing, Use hatch, text and simple dimensioning routines, Use basic editing commands and produce simple hard copies
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