15WS41T: Welding Technology – II Mechanical WS 4th Sem Syllabus for Diploma DTE Karnataka C15 Scheme

Welding Technology – II detail DTE Kar Diploma syllabus for Mechanical Engineering (Welding & Sheet Metal) (WS), C15 scheme is extracted from DTE Karnataka official website and presented for diploma students. The course code (15WS41T), and for exam duration, Teaching Hr/week, Practical Hr/week, Total Marks, internal marks, theory marks, duration and credits do visit complete sem subjects post given below. The syllabus PDFs can be downloaded from official website.

For all other mechanical ws 4th sem syllabus for diploma c15 scheme dte karnataka you can visit Mechanical WS 4th Sem Syllabus for Diploma C15 Scheme DTE Karnataka Subjects. The detail syllabus for welding technology – ii is as follows.

Pre-requisites:

Knowledge of basic Science, Basic Mechanical Engineering & welding technology I.

Course Objectives:

Understand the fundaments of arc welding, characteristics of arc column & consumables, Shielded metal arc welding, submerged arc welding, Resistance welding and Electro slag welding, Electro Gas Welding and Economics of welding.

Course Outcomes:

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Unit I

Welding Arc & consumables; Definition of an arc, structure and characteristics, cathode spot, cathode drop zone, arc column, anode and the anode drop zone, Arc efficiency ,Arc blow ,Electrical characteristics of an arc, Types of welding arcs, methods of arc initiation, Role of electrode polarity, Arc stability , coated electrodes, purposes of electrode coatings,
light coated electrodes, heavy coated electrodes, classifications and coding of covered electrodes(heavy coated) for carbon and carbon- manganese structural steel, welding rods and wires, welding fluxes, shielding gases, other gases ,gas mixtures

Unit II

Arc welding Power source; Arc welding power sources and its requirement, volt ampere characteristics of a welding power source, external static volt ampere characteristic, constant current characteristics , constant voltage characteristics, selection of a static volt-ampere characteristic for welding process, A.C. power sources, operating principles of welding transformer, requirement of welding transformer, basic types of welding transformer, the high reactance types welding transformer, D.C. welding power source, opposition series generator, rectified D.C. welding power source, SCR welding power source.

Unit III

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Unit IV

Resistance welding; Introduction, Basic principles of process, Resistance spot welding, Spot welding sequence, Welding cycle, welding variables , resistance welding equipment, Machine rating, types of equipment, spot welding electrodes, weld ability , Seam welding, Seam welding electrodes ,Joint design, Application, Variants of resistance seam welding, projections welding, Heat balance, Applications, Variants of projection welding

Unit V

Electro Slag Welding & Electro Gas Welding; Equipment and material of ESW, Power source, Wire feeder, Electrode guide tube, Retaining blocks, Welding head and controls, Materials, Electrical circuit and a setup for ESW, ESW operation and technique, Process variables, Deposition Rates, weld joint design, weld structure and properties, Applications, Variants of ESW, Setup and process details of EGW, Uses

Unit VI

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Reference Books:

1. Welding principles and practices by Edward R. Bohnart, Mc. Graw Hill Education, 2014.
2. Welding and Welding technology, Richard L little, Mc. Graw Hill Education
3. Welding processes and technology – Dr. Parmar.R.S
4. Welding processes and technology – O.P Khanna
5. Foundry, Forming and Welding, P.N.Rao 2nd Edition TMH

SUGGESTED LIST OF STUDENT ACTIVITYS

Note: the following activities or similar activities for assessing CIE (IA) for 5 marks (Any one)

1. Make Visit to nearest work shop ,observe the different Arc and Gas, TIG and MIG welding and make a hand written report
2. Observe the welding shop of your polytechnic and study its specifications and list the general safety.

Course Delivery:

• The course will be delivered through lectures and Power point presentations/ Video

Model Question Paper:

(CIE)

1. Explain structure and characteristics of welding arc.
2. Explain high reactance type welding transformer with a schematic diagram.
3. Differentiate between fixed arc and travelling arc OR Explain the role of electrode polarity
4. Explain static volt-ampere characteristics of a welding power source. OR List the advantages of a arc welding rectifier power sources.

Model Question Paper:

(SEE)

PART A 6×5=30 marks

1. Explain structure and characteristics of welding arc.
2. State five requirements of a welding transformer.
3. Differentiate between constant current characteristics and constant voltage characteristics
4. Draw the circuit diagram of SMAW
5. List five applications of SAW
6. Explain the basic principles of resistance welding process
7. State five advantages of ESW
8. Define Electro gas welding process and state its advantages.
9. Define post welding operation, scrap allowance, standard time.

PART-B 7×10=70 marks

1. Define cathode drop zone, anode drop zone and arc column
2. Differentiate between coated electrode and filler wires
1. Explain high reactance type welding transformer with a schematic diagram.
2. Explain external static volt ampere characteristics with a schematic diagram.
1. Explain duty cycle with the neat sketch.
2. Explain SCR welding power source
1. Explain joint design in SMAW process.
2. Explain the effect of metal fusion and weld penetration.
1. Explain the process variables of SAW
2. Sketch the electrical circuit and setup for SAW
1. Explain the resistance spot welding process details with sketch
2. List the advantages of resistance spot welding.
1. Explain seam welding process with a neat sketch.
2. List the variants of resistance seam welding
1. Explain Electro slag welding process.
2. Sketch the electrical circuit and a setup for ESW
1. Explain the setup of EGW with diagram
2. List five application of EGW
1. Explain the importance of economics in welding
2. Find the standard time for welding of steel using 4 mm diameter electrode with a current of 180A and a deposition ratio of 10g/A.h. The area of cross section of the weld is 0.60 cm2 and it is 1 m long and density of steel is 7.85 g/cm3 and an operator factor of 0.25

For detail syllabus of all other subjects of BE Mechanical Ws, C15 scheme do visit Mechanical Ws 4th Sem syllabus for C15 scheme.

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