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Your welding helmet is too dark to see the work when welding?
The helmet holds the lens. Lenses come in different shades (darkness). Use the correct shade. Most welding applications call for a shade #10. TIG weldors usually use a shade #9. Plasma applications can call for a shade #11.
How does welding damage eye sight?
An electric welding arc produces ultraviolet light and the UV light will damage the retina. With a good welding helmet, your eyes will be protected, but you must have the proper shade (somewhere between 9 and 14 depending on your amperage) and if using an auto-darkening helmet, it must switch on quickly. (1/25000 of a second)
Tools and equipment used in arc welding?
Arc Welding: 1. Welding Helmet with flip front. (Shade #10 or #11) 2. Heavy leather welding gloves. (Consumable, 2 pairs per quarter) 3. Leather welding jacket 4. Leather apron or chaps 5. Leather work steel toed boots. (8" or higher) 6. Slag Hammer 7. Vise grips 8. Wire Brush 9. Welders cap 10. 4 ½" or 5" electric grinder, with 4" wire wheel. 11. Set of fillet weld gages. 12. Welder's respirator. 13. 12" tape measure 14. Flashlight
What is the design procedure for single point cutting tool?
1.you have to know the workpiece material 2.tool material 3.type of machining process 4.sinle point or multi point tool 5.roughing or finishing cut 6.stresses that applied on the tool 7.dry or wet machining 8.cutting conditions,speed,feed and depth of cut 9.productivity and tool life 10.surface finish required
How to design a DFA that accepts an identifier in c language?
letter -> [a-zA-Z] digit -> [0-9] identifier -> letter|_(letter|digit|_)
