TIG Book Episode 2 pps

... IONS ELECTRONS 3/ 32& quot; ELECTRODE WORK + – + – + – ELECTRODEWORK Current 0 + _ 20 0 20 0 Sine Wave Square Wave Advanced Square Wave 7 for GTAW • Gas Tungsten Arc Welding TIGTIG HANDBOOKHANDBOOK Figure 2. 26 ... A 100 A ADVANCED SQUAREWAVE AC WAVE TIME 0 13 for GTAW • Gas Tungsten Arc Welding TIGTIG HANDBOOKHANDBOOK Figure 2. 22 shows an illustration of the frequency effects on a w...

Ngày tải lên: 12/08/2014, 08:21

... wrists. See Figure 5.1 and 5 .2. Figure 5.1 Properly dressed welder. Figure 5 .2 Boots, leathers, gloves. 43 for GTAW • Gas Tungsten Arc Welding TIGTIG HANDBOOKHANDBOOK Safe Handling of Cylinders Regardless ... cylinder. Handwheel Outlet Nozzle Protector Cap Valve Safety Nut 45 for GTAW • Gas Tungsten Arc Welding TIGTIG HANDBOOKHANDBOOK It is essential to know that some Gas Tungsten Arc W...

Ngày tải lên: 12/08/2014, 08:21

... LIGHTROOM 3 CLASSROOM IN A BOOK 25 mode using the settings current in the Slideshow module. e slideshow will repeat until you return to the Library module by pressing the Esc key. 2 While the slideshow ... selection in the Survey view in the same way. ptg ADOBE PHOTOSHOP LIGHTROOM 3 CLASSROOM IN A BOOK 23 2 Lightroom will open in the screen mode and workspace module that were a...

Ngày tải lên: 08/08/2014, 13:21

... is usually a minor thing. Q26: The following microbiological investigations should be done routinely in all cases of community acquired pneumonias, except one investigation: a- Sputum for gram ... All patients with a resting PaO2 of less than 9 kPa on air require supplementary O2. e- Hypercapnia is an absolute contraindication to air plane traveling. Q 12: In COPD, which one is the wrong...

Ngày tải lên: 09/08/2014, 16:21

... I4md 14,cd 14cd Class 422 (short 42) - P 422 P 42 P4 422 P 422 P4 ,22 P4 ,2 P4 ,22 P4 ,2 P 42, 2 P 42, P 422 12 P 422 , P4 121 2 P4 121 P4 321 2 P4 32, 1 422 1 422 14 ,22 14 ,2 422 mmm Class (short 4/mmm)-D4h ... 156.8 20 6.7 163.6 21 5.4 171.1 22 6.8 180.0 23 7.7 190.3 24 9 .2 20 0 .2 24 9.0 20 1.1 25 8.8 21 0.1 26 6.6 21 7.8 27 3.6 22 4.7 2...

Ngày tải lên: 10/08/2014, 12:21

Ngày tải lên: 11/08/2014, 10:22

... I. The GTAW (TIG) Process The necessary heat for Gas Tungsten Arc Welding (TIG) is produced by an electric arc maintained between a nonconsumable ... added to enhance travel speeds. The GTAW process can produce temperatures of up to 35,000˚ F/19, 426 ˚ C. The torch contributes only heat to the workpiece. If filler metal is required to make the ... is that it will weld more kinds of metals a...

Ngày tải lên: 12/08/2014, 08:21