Welding rod arc welding uses different angles and techniques in different positions. 1. When welding flat plates without grooves: the left and right sides of the welding rod are 90 degrees each, and the welding direction between the welding rod and the workpiece is 85 to 70 degrees. When welding with a V-shaped break: the left and right angles between the welding rod and the workpiece remain unchanged at 90 degrees, and the angle along the welding direction is 50 to 75 degrees. 2. When welding in the horizontal welding position: the welding rod and the workpiece are inclined downward by 10 to 15 degrees and 75 to 85 degrees along the welding direction. 3. When welding flat plates vertically: Use the bottom-up welding method, with the left and right sides of the welding rod being 90 degrees each, and the lower angle between the welding rod and the workpiece being 75 to 80 degrees. The purpose is to use the arc blowing force to hold the metal in the molten pool and prevent it from flowing down. During vertical fillet welding: the lower angle of the workpiece should be 75 to 80 degrees, and the left and right should be divided into 45 degrees. When welding horizontally and upward: the left and right angles between the welding rod and the workpiece are 90 degrees, and the angle between the welding rod and the workpiece is 90 to 85 degrees along the direction. Different techniques are used in different locations, and different techniques have different essentials.