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Processes MIG (GMAW) WeldingGuidelines For Gas Metal Arc Welding

Tham khảo sách 'processes mig (gmaw) weldingguidelines for gas metal arc welding', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Miller 154 557 A 2007-02 Processes MIG GMAW Welding Guidelines For Gas Metal Arc Welding GMAW Visit our website at www.MillerWelds.com TABLE OF CONTENTS SECTION 1 - SAFETY PRECAUTIONS - READ BEFORE USING. 1 1-1. Symbol Usage. 1-2. Arc Welding Hazards. 1-3. Additional Symbols For Installation Operation And Maintenance . 1-4. California Proposition 65 Warnings. 1-5. Principal Safety Standards . 1-6. EMF Information . 1 1 3 3 4 4 SECTION 2 - GAS METAL ARC WELDING GMAW . 5 2-1. Typical GMAW Semiautomatic Setup With Constant Speed Feeder . 6 2-2. Typical GMAW Semiautomatic Setup With Voltage-Sensing Feeder . 7 2-3. Typical GMAW Process Control Settings. 8 2-4. Holding And Positioning Welding Gun . 9 2-5. Conditions That Affect Weld Bead Shape . 10 2-6. Gun Movement During Welding . 11 2-7. Poor Weld Bead Characteristics . 11 2-8. Good Weld Bead Characteristics . 12 2- 9. Common GMAW Shielding Gases . 12 SECTION 3 - MODES OF GMAW TRANSFER . 13 3- 1. Short Circuit Transfer . 13 3-2. Globular Transfer . 14 3- 3. Spray Arc Transfer . 14 SECTION 4 - GMAW WELDING TROUBLESHOOTING . 15 4- 1. Excessive Spatter . 15 4-2. Porosity . 15 4-3. Incomplete Fusion . 16 4-4. Excessive Penetration . 16 4-5. Lack Of Penetration . 16 4-6. Burn Through . 17 4-7. Waviness Of Bead . 17 4-8. Distortion . 17 SECTION 1 - SAFETY PRECAUTIONS - READ BEFORE USING som _3 05 Ậ Warning Protect yourself and others from injury read and follow these precautions. 1-1. Symbol Usage A Means Warning Watch Out There are possible hazards with this procedure The possible hazards are shown in the adjoining symbols. A Marks a special safety message. Means Note not safety related. This group of symbols means Warning Watch Out possible ELECTRIC SHoCk moving parts and HOT PARTS hazards. Consult symbols and related instructions below for necessary actions to avoid the hazards. 1-2. Arc Welding Hazards A The symbols shown below are used throughout this manual to call attention to and identify possible hazards. When you