Tack Welding
Tack welding is a preparatory welding type that briefly fixes components in place to secure their position and prevent distortion during assembly.
Physical-Chemical Working Principle
Tack welding refers to a quick weld with low voltage that only holds the material together temporarily. It is often done with low heat input and does not create a permanent joint.
Metallurgical Relevance & Risks in Welding
Tack welding is important to stabilize the geometric position of parts during assembly. Incorrect settings or too short weld times can result in a joint that is not strong enough and may fail later. Excessive voltage can damage the material.
Shop Practice & Procedures
For tack welding, use low heat input and short weld times (about 1-2 seconds). Ensure the parts are precisely aligned before you start. After tack welding, check the joint strength by visual inspection.