iti 4 April 2025

Trade Name: Sheet Metal Worker
Duration: 1 Year (2 Semesters)
NSQF Level: Level 4
Eligibility: 10th Grade Pass with Science and Mathematics
Objective: To train candidates in cutting, bending, forming, and assembling sheet metal to create products like ducts, panels, and containers, equipping them for roles as sheet metal fabricators, duct installers, or panel makers in manufacturing, construction, or automotive industries, or for self-employment in sheet metal workshops.
Certification: National Trade Certificate (NTC) by NCVT

Trade Theory

Introduction to Sheet Metal Work: Role of sheet metal workers, applications in HVAC, automotive, and construction.
Safety Practices: Workshop safety, PPE (gloves, goggles, aprons), handling sharp edges, fire hazards, first aid.
Workshop Tools: Shears, snips, hammers, punches, measuring tools (calipers, rulers); usage and maintenance.
Sheet Metal Materials: Types (steel, aluminum, copper), gauges, properties, corrosion resistance.
Cutting Techniques: Manual cutting, machine shearing, nibbling; achieving clean edges.
Forming Basics: Bending, folding, rolling; principles of metal deformation.
Engineering Drawing: Reading sheet metal layouts, orthographic views, development drawings.

Trade Practical

Safety Drills: Using PPE, handling sheet metal safely, practicing machine shutdown, emergency procedures.
Tool Handling: Cutting with snips/shears, measuring sheet thickness with calipers, marking layouts.
Cutting Practice: Shearing straight lines, cutting curves on steel sheets, ensuring accuracy (±1mm).
Bending Tasks: Bending sheets using hand tools and brake machines, forming angles (90°, 45°).
Forming Exercises: Rolling sheets into cylinders, creating simple seams (lap, grooved).
Drawing Interpretation: Marking sheet metal for cutting/bending based on layout drawings.
Project Work: Fabricating a rectangular tray with folded edges and seams.

Hours: Theory: 160 hours | Practical: 240 hours

Trade Theory

Joining Techniques: Riveting, soldering, welding (MIG, TIG); applications in sheet metal assembly.
Advanced Forming: Deep drawing, flanging, hemming; creating complex shapes.
Sheet Metal Machines: Power presses, CNC turret punch, folding machines; operation and safety.
Ducting and HVAC: Duct design, fabrication, insulation; standards for air distribution systems.
Surface Treatment: Cleaning, priming, painting; corrosion protection for sheet metal products.
Quality Control: Inspecting joints, dimensions, surface finish; BIS standards, tolerances.
Entrepreneurship: Starting a sheet metal workshop, costing, market trends in fabrication.

Trade Practical

Joining Tasks: Riveting sheet metal panels, soldering seams, performing MIG welds on steel sheets.
Advanced Forming: Creating conical shapes, flanging edges, hemming for strength.
Machine Operations: Using CNC punch for hole patterns, operating power presses for forming.
Duct Fabrication: Cutting and assembling rectangular HVAC ducts, sealing joints.
Surface Finishing: Applying primer/paint, polishing metal surfaces, checking for uniformity.
Quality Inspection: Measuring fabricated parts with gauges, verifying seam strength, documenting defects.
Project Work: Fabricating a sheet metal duct section or cylindrical container with riveted joints and surface finish.

Hours: Theory: 160 hours | Practical: 240 hours

Workshop Calculation and Science
- Calculations: Material estimation, bend allowance, riveting patterns, duct sizing.
- Science: Metal properties, stress/strain in bending, thermal effects in welding.
- Hours: 80 hours/year
Engineering Drawing
- Drawings: Sheet metal developments, duct layouts, sectional views of assemblies.
- Hours: 80 hours/year
Employability Skills
- Communication: Customer interaction, technical reporting, teamwork.
- IT Literacy: Using CAD for sheet metal design, CNC programming basics, online fabrication resources.
- Soft Skills: Time management, resume writing, interview preparation.
- Hours: 60 hours/year

Sheet Metal Worker

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