Chapter 12 53 Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website. Name ________________________________________________________________ Date ________________________ Class ________________ Assigned Job 12-1 Running a Weld Bead in the Flat Welding Position OBJECTIVE: In this job, you will learn to make satisfactory stringer and weave beads using the SMAW process. You will also learn to read a weld bead. Do not attempt this job until: • •• You have read all safety precautions. •• You have satisfactorily completed the Shielded Metal Arc Welding (SMAW) Safety Test. • You have received permission from your instructor. NOTE 1. Obtain three pieces of carbon steel that measure 1/4″ × 6″ × 6″ (6 mm × 150 mm × 150 mm). Also, obtain three each of the following electrodes: • 1/8″ (3 mm) diameter E6010. • 5/32″ (4 mm) diameter E6012. • 1/8″ (3 mm) diameter E6013. • 5/32″ (4 mm) diameter E7018 (or other iron powder electrode). 2. Fill in the amperage range and polarity for each of the electrodes. Refer to Figure 11-9 in the text for the amperage ranges and Figure 11-6 for the suggested polarity. Diameter Designation Amperage Range Polarity Min. Max. 1/8″ E6010 5/32″ E6012 1/8″ E6013 5/32″ E7018 A. Amperage range and polarity:________________________________________________________________________ B. How wide should a stringer bead be for a 1/8″ (3 mm) diameter electrode? Show your work. _ __________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ C. How wide should a stringer bead be for a 5/32″ (4 mm) diameter electrode? Show your work. _ __________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ D. What is the maximum width for a weave bead made with a 1/8″ (3 mm) diameter electrode? Show your work. _ _________________________________________________________________________________________________________________ E. What is the maximum width for a weave bead made with a 5/32″ (4 mm) diameter electrode? Show your work. _ _________________________________________________________________________________________________________________ 3. Make a safety inspection of your welding station. 4. Place the 1/4″ (6 mm) steel plate on the worktable. 5. Place the E6010 electrode into the electrode holder and hang the holder on the insulated hook in the booth.