safety precautions for welding works lesson demo

7/29/2019 Safety Precautions for Welding Works Lesson Demo

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SAFETY PRECAUTIONS

FOR WELDING WORKS

Prepared by :

Renato PelicanoBTTE - MPET


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Familiarize different safety suits and gadgetsbefore doing such activities.

Overall of suitable size made of flame proof material.

Safety shoes with steel toe-cap and steel support toprotect feet from falling objects, sharp edges, etc.

Spats to protect the ankles from melted metal and splatter.

Apron to protect the front of your body when welding orcutting.

Arm and wrist protectors to protect your arms from heat,

rays, etc. Welding gloves made from tanned leather.

Welding screen, hand held type, to be fitted with weldingglasses, 60 x 110mm.

NOTE :

Never expose your naked eyes to the light of anelectric arc or a welding torch.


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Welding helmet to be fitted with weldingglasses 60 x 110mm.

Welding glasses and protective glasses 60x 110mm for welding screens and weldinghelmets.

Protective helmet, ear mufflers andwelding helmet with welding glasses.

The adjustments are done by tighteningor loosening the special strap inside the

helmet. Protective goggles of rigid and

comfortable design.


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The AWS system distinguish the tensilestrength, weld position and coating and current.

Manufactures may and do use there own

numbering system and produce electrodes thatdo not fit on the AWS system. Electric arc welding uses the same five (5)

types of joints and five (5) types of welds.

American Welding Society (AWS)

Classification System


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FIVE TYPES of WELDS

Surface

Groove

FilletPlug

Slot


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SURFACE WELDS

Surface welds are welds were a materialhas been applied to the surface of anothermaterial.

May or may not be blended with the workpiece.

Two common applications are hardsurfacing and padding.


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SURFACE WELDS Example


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GROOVE WELDS

Groove welds are used to fuse the sidesor ends of two pieces of metals.

The primary use of groove welds is tocomplete butt joints.


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GROOVE WELDS Example


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FILLET WELDS

Fillet welds have a triangular cross sectionand are used to fuse two faces of metalthat are at a 90 degree angle to each

other.


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FILLET WELDS Example


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PLUG WELDS

Plug welds are used to attach twosurfaces together when a complete jointis not required and the design does notallow for any weld bead outside thedimension of the metal.


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PLUG WELDS example


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SLOT WELDS

Slots welds are identical to plug weldsexcept for the shape of the holes. For slot

welds, slots are machined or stamped inthe upper plate.


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SLOT WELDS example


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PROBLEM:

The students must be able to applythe five types of Welds for a given time.


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Enumeration

Directions: Give at least five (5) for the basicsafety precautions in welding works.


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Label the parts ofthe gadgets touse in theworkshop.


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safety precautions for welding works lesson demo

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