The Directorate General of Training (DGT) under Ministry of Skill Development & Entrepreneurship offers a range of vocational training courses catering to the need of different sectors of economy/ Labour market. The vocational training programmes are delivered under the aegis of Directorate General of Training (DGT). Craftsman Training Scheme (CTS) with variants and Apprenticeship Training Scheme (ATS) are two pioneer schemes of DGT for strengthening vocational training.

Welder (GMAW & GTAW) trade under CTS is one of the courses delivered nationwide through network of ITIs. The course is of one year duration. It mainly consists of Domain area and Core area. In the Domain area (Trade Theory & Practical) imparts professional skills and knowledge, while Core area (Workshop Calculation science, Engineering Drawing and Employability Skills) imparts requisite core skills, knowledge and life skills. After passing out of the training program, the trainee is awarded National Trade Certificate (NTC) by DGT which is recognized worldwide.

Broadly candidates need to demonstrate that they are able to:

• Read & interpret technical parameters/document, plan and organize work processes, identify necessary materials and tools;
• Perform task with due consideration to safety rules, accident prevention regulations and environmental protection stipulations;
• Apply professional skill, knowledge, core skills & employability skills while performing jobs.
• Check the job/assembly as per drawing for functioning, identify and rectify errors in job/assembly.
• Document the technical parameters related to the task undertaken.

JOB ROLE

Welder Gas; fuses metal parts together using welding rod and oxygen acetylene flame. Examines parts to be welded, cleans portion to be joined, holds them together by some suitable device and if necessary makes narrow groove to direct flow of molten metal to strengthen joint. Selects correct type and size of welding rod, nozzle etc. and tests welding, torch. Wears dark glasses and other protective devices while welding. Releases and regulates valves of oxygen and acetylene cylinders to control their flow into torch. Ignites torch and regulates flame gradually. Guides flame along joint and heats it to melting point, simultaneously melting welding rod and spreading molten metal along joint shape, size etc. and rectifies defects if any.

Welder Electric; fuses metals using arc-welding power source and electrodes. Examines parts to be welded, cleans them and sets joints together with clamps or any other suitable device. Starts welding power source and regulates current according to material and thickness of welding. Connect one lead to part to be welded, selects required type of electrode and clamps other lead to electrode holder. May join parts first at various points for holding at specified angles, shape, form and dimension by tack welding. Establish arc between electrode and joint and maintain it throughout the length of the joint.

Gas Cutter; cuts metal to require shape and size by gas flame either manually or by machine. Examines material to be cut and marks it according to instruction of specification. Makes necessary connections and fits required size of nozzle in welding torch. Releases and regulates flow of gas in nozzle, ignites and adjusts flame. Guides flame by hand or machine along cutting line at required speed and cuts metal to required size.

Welder (GMAW & GTAW) while doing Gas Tungsten Arc welding (GTAW) also known as Tungsten Inert Gas (TIG) welding reads fabrication drawing, examines parts to be welded, cleans them and sets joints with clamps or any other suitable device. Selects suitable tungsten electrode, grinds the edges and fit in to the GTA welding torch. Selects gas nozzle and fit in to the GTA welding torch. Selects suitable filler rods and cleans them. Connects work piece with earth cable, Connects the machine with Inert gas Cylinder, regulator and flow meter. Starts the constant current GTA welding machine, sets suitable welding current & polarity and inert gas flow. Establish arc through across a column of highly ionized inert gas between work piece and Tungsten electrode. Melts the metal and deposit weld beads on metal surfaces by passing the suitable filler rod in to the weld puddle. Joins Steel, Stainless steel & Aluminium sheets and Aluminium & SS tubes .

Welder (GMAW& GTAW) while doing Gas Metal Arc welding also known as MIG/MAG Welding, reads fabrication drawing, examines parts to be welded, cleans them and sets joints with clamps or any other suitable device. Connects work piece with earth cable. Connects the machine with suitable gas Cylinder, regulator and flow meter. Connects preheater when CO2 is used as shielding gas. Selects suitable wire electrode, feed it to welding GMA Welding torch through wire feeder. Selects contact tip gas nozzle and fit in to the GMA welding torch. Preheats joints as required. Starts the Constant Voltage GMA welding machine, sets suitable welding voltage & wire feed speed and shielding gas flow, produces arc between work piece and continuously fed wire electrode. Melts the metal and deposit weld beads on the surface of metals or joins metal pieces such as Steel, Stainless steel and aluminium metals. Also will do mixed shielding gas welding. May experience with tubular wire welding called Flux Cored Arc Welding (FCAW)

Plan and organize assigned work and detect & resolve issues during execution in his own work area within defined limit. Demonstrate possible solutions and agree tasks within the team. Communicate with required clarity and understand technical English. Sensitive to environment, self-learning and productivity.

LEARNING OUTCOMES

• 1. Perform joining of MS sheet by Gas welding in different positions following safety precautions.
• 2. Join MS plates by SMAW in different positions.
• 3. Perform straight, bevel & circular cutting on MS plate by Oxy-acetylene cutting process.
• 4. Perform different types of MS pipe joints by Gas welding (OAW).
• 5. Weld different types of MS pipe joints by SMAW.
• 6. Setup GMAW / GTAW plant and weld M.S, S.S and Aluminium sheets in all positions.
• 7. Perform Arc gauging on MS plate.
• 8. Join MS/ Aluminium /SS sheets/plates by GMAW in various positions using different modes of metal transfer.
• 9. Use of mixed shielding gas for GMAW welding.
• 10. Welding of metals by FCAW process.
• 11. Join Aluminium & Stainless Steel sheets by GTAW in different position.
• 12. Weld pipe joints by GTAW.
• 13. Cut ferrous and nonferrous metal using plasma Arc cutting.
• 14. Test welded joint by visual inspection Dye penetrant & Magnetic particle testing methods.