Welding rod feeding direction and technique

Ⅰ. What is the direction of the welding rod?

During the welding process, the direction of the welding rod refers to the direction in which the welder moves the welding rod during the welding process. The correct welding rod direction and technique can effectively ensure the quality and effect of welding.

Ⅱ. The way of moving the welding rod

1. Vertical downward rod movement method

This rod movement method is suitable for situations where there are strong requirements for the cross-section of the weld, such as welding of thick plates and tight seamless steel pipes. During operation, the head of the welding rod is placed above the weld, and the weld is probed downward with uniform force. At the same time, the welding rod should also move downward with the progress of welding so that it is in an orthogonal position with the weld. The welder then controls the speed of the welding rod to continuously cover the weld in front.

2. Straight line rod movement method

It refers to the bottom exploration method, which is mainly used in situations where the strength requirements of the weld are low, and is suitable for welding of steel structures with small horizontal volume. During operation, the angle of the welding rod head should be guaranteed to be orthogonal to the weld, the rod movement speed should be uniform, the weld should be gradually covered, and the filamentary weld should be evenly arranged.

3. Flipping and moving the welding rod method

It refers to the inverted bottom of the weld, which is mainly used in industrial equipment with high requirements for the strength and sealing of the weld, such as water heaters. When welding, the welding workpiece should be inverted by equipment such as building scaffolding. During operation, the welding rod should be kept vertical to the horizontal line, and the distance from the weld baseline should be appropriate. The welding rod head is inserted into the seam, the weld is trimmed as required, and finally the welding device is removed.

III. Welding rod technique

1. Front and back technique

During the welding process, the effective control of the welding rod technique plays a vital role in the weld shape and welding defects. Generally speaking, it is mainly manifested in the front and back technique. The front and back technique is actually a kind of operation technique similar to the aa character, which is more mainstream for groove welds.

2. Micro-circular technique

The micro-circular technique is mainly suitable for operating ramp welds. This technique is mainly "U"-shaped, composed of a small arc and a straight line, presenting a weld shape similar to the I-shaped, and there are arcs of different curvatures inside the weld, which makes the defects after welding less.

The above is an introduction to the direction and techniques of welding rod movement. The correct direction and techniques of welding rod movement can effectively ensure the welding quality and effect. If you want to master these operating skills, you need more practice.