1. Why should the welding process be formulated before welding? Answer: To ensure the quality of welding, we rely on five major control links: people, machines, materials, laws, and rings. Operator skills and experience of the welder machine High performance and stability of welding equipment High quality of material welding materials Correct welding process procedures and standardized operations Ring good welding working environment According to the welding test and welding process evaluation before welding, the welding process regulations formulated are regulations and are an important factor in ensuring the quality of welding.
2. Why should the surface treatment of the base metal be processed before welding? A: If the surface treatment of the base metal is not carried out before welding, the oxides on the surface of the base metal will bring harm and hidden dangers to the welded joint.
3. What is the melting coefficient of welding wire? A: The melting coefficient of the welding wire refers to the amount of melting of the welding wire per unit time when passing through the unit current. (g/Ah) The finer the wire, the greater its melting coefficient, which is both efficient The higher.
4. What is the welding process parameters? A: The process parameters will be set before welding, and a high-quality welding point is inseparable from the process parameters (for example: welding current, arc voltage, welding Speed, line energy, etc.).
5. What is welding current? A: When welding, the current flowing through the welding circuit is generally expressed in amperes (A).
6. What is arc voltage? A: The voltage drop between the two ends of the arc (two electrodes) is generally expressed in volts (V).
7. What is welding speed? A: The length of the weld completed per unit of time is generally expressed in centimeters per minute (cm/min).
8. What is the dry extension length? A: When welding, the distance between the end of the wire and the end of the conductive nozzle.
9. What is welding line energy? A: When welding, the energy input to the unit length weld by the welding heat source, also known as the heat input. It is generally expressed in joules/cm (J/cm).
10. What is the fusion ratio of weld metal? A: When welding, the proportion of the melted base metal in the weld metal.
11. What is the shape coefficient of the weld? A: When welding, the ratio of weld width to weld thickness on the cross-section of a single weld. 12. What is the left-facing welding method? A: During fusion welding, the welding torch is moved from the right end of the weldment seam to the left end of the welding method. The gas protection effect is good, and the weld molding is beautiful. CO2 and TIG welding use the lef
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