Deposit Straight Bead(shielded metal arc welding).pptx

Deposit Straight Bead(shielded metal arc welding)

1. LO2: DEPOSIT STRAIGHT BEAD • WELDING ESSENTIALS DELOS REYES, JAYWOLD L. STUDENT TEACHER Arowwai Industries

2. LET US FIRST PRAY AND SEEK THE GUIDANCE OF THE LORD.

3. Arowwai Industries I have prepared some riddles to improve your concentration and interpretation skills. This riddles are connected to our new topic which will be revealed later on. Anyone who can guess first the correct answer will be rewarded. DIRECTION:

4. Keep me fed, full, and fat, With notes, cards, and coins at that. Take me with you wherever you go, Just make sure I never run low! W__L__

5. WALLET

6. Green, brown, and tall, I shed a lot in the fall. I give you flowers, I give you fruit, Dig deep to find my roots! __E_S

7. TREES

8. Shiny, juicy, crunchy, and red, Bite me raw or in a pie instead. You should eat me every day, I’m all you need to keep the doctor away! _P__E

9. APPLE

10. I am the element found in just about everything. I am the air you breathe, and support the growth of all living things. What am I? __Y_E_

11. OXYGEN

12. Who is that with a neck and no head, two arms and no hands? What is it? ___I_T

13. T-SHIRT

14. WHAT DO WE MEAN BY THE WORD ESSENTIAL/S?

15. APPLICATION OF THE WORD ESSENTIAL IN WELDING .

16. WELDING PROCESS

17. 01 02 03 CORRECT ELECTRODE SIZE CORRECT CURRENT CORRECT ELECTRODE ANGLE What are the five welding essentials? 04 05 CORRECT ARC LENGTH OR VOLTAGE CORRECT TRAVEL SPEED

18. 01 CORRECT ELECTRODE SIZE

19. Larger diameter electrodes are used on thicker metals and for flat position welding because they offer higher deposition rates.

20. Smaller diameter electrodes are used for horizontal, vertical and overhead welding, because they produce a smaller weld puddle that is easier to control than the bigger puddle produced by larger diameter electrodes

21. Joint design also affects electrode diameter. On groove welds for example, the electrode has to be small enough to access the root of the joint. He welder’s skill also has a bearing on electrode diameter because a more capable welder can control a larger, more fluid weld puddle.

22. 02 CORRECT CURRENT

23. A volt is the unit of electric potential difference. Another way to explain volt is the force that sends electrons through an electrical circuit to establish an electric current that’s measured in amperes. An ampere is the unit for electric current, which is the number of electrons flowing through a circuit.

24. FOR YOUR ACTIVITY! I will need a volunteer from the class to perform this activity. Using a core wire, I will give you 3 scenarios which you will perform to weld the core wires, while the rest of the class will write down an observation.

25. OBSERVATIONS WHAT HAVE YOU OBSERVED FROM YOUR ACTIVITY?

26. FOR YOUR PERFORMANCE I HAVE PREPARED HERE CORRUGATED BARS FOR YOUR PERFORMANCE. YOU WILL ONLY WELD THE TWO BARS TOGETHER USING CORRECT ELECTRODE SIZE AND CORRECT CURRENT. EACH ONE OF YOU WILL PERFORM THIS ACTIVITY AND I WILL GIVE YOU 5-10 MINUTES EACH STUDENT.

27. CRITERIA 5 points 4 Points 3 points 2 points ACCURACY Follows the correct electrode size and correct current Follows correct electrode size but incorrect current. The joints are connected but with incorrect current settings.. Both electrode size and current settings are incorrect as well as welding technique. SPEED Finished in the activity on time. Finished the activity 1 minute after the time allotted. Finished the activity 2 minute after the time allotted Finished the activity 3 minute after the time allotted STURDINESS The joints are properly welded and can withstand breaking force. The joints are properly welded but with slight imperfection. The joints are not properly welded and can’t withstand force. The welded joints breaks easily after using chipping hammer. SAFETY Demonstrate the proper use of PPE. Use only 3 PPE while working. Use only 2 PPE while working. Use only 1 PPE while working. YOU WILL BE GRADED USING THIS CRITERIA:

28. LET'S HAVE A QUIZ DIRECTION : WRITE TRUE IF THE STATEMENT IS CORRECT AND FALSE IF THE STATEMENT IS WRONG. 1. The electrode melts too fast if the current settings is too high. 2. Ampere is the unit of measurement for current. 3. A volt is the unit of electric potential difference. 4. Amperage ranges are usually specified in the welding procedure or in the manufacturers’ data sheets. 5. Joint design also affects electrode diameter.

29. FOR YOUR ASSIGNMENT KINDLY BRING YOUR MATERIALS TOMORROW FOR THE CONTINUATION OF YOUR INDIVIDUAL PERFORMANCE.