00:00You won't believe this is how skilled welders join metal
00:031. Square tubes don't match when making angled joints
00:06and the surfaces won't fit together
00:08Mark a point under the angled tube first
00:10Draw an extended reference line
00:12Measure the distance between the point and the vertical tube
00:15Use that length to mark the top of the angled tube
00:18Connect the marks to the reference line
00:21Cut along the line and the tubes fit together perfectly
00:242. Large gaps in angled round pipe joints
00:27Don't worry
00:28Piece of paper with the same width as the pipe diameter
00:31Fold it in half and wrap it tightly around the pipe
00:34Mark the radius along the fold line
00:36Place the pipe on the paper
00:37Draw a semicircle using the marked points
00:40Mark the center of the bottom edge
00:42Connect it to the arc ends
00:44Then extend the lines following the pipe curve
00:46And create a complete cutting template
00:48Cut along the pattern
00:49Wrap paper around the pipe
00:51Trace cutting line
00:52After cutting, the contact surfaces match perfectly
00:55With matching bevel curves and seamless joints
00:583. Angle steel
00:59Three-dimensional corner joints
01:01Have large gaps and can't be welded properly
01:04Align the angle steel pieces first
01:06Tack weld the corner to hold it in place
01:08Place the welding rod at the inner corner intersection
01:11Mark the angle
01:12Difference on the rod
01:14Flip the angle steel over mark
01:16The matching gap position
01:17Draw reference lines through the marks
01:19Connect both sides to the center point
01:21And create the triangular cutting area
01:24Cut along the lines and the joint surfaces fit perfectly
01:27Creating a strong and clean three-dimensional connection
01:30Find a strong and clean three-dimensional connection
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