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US 12,523,246 B2Granted
Lap fillet weld joint, production method thereof and member with closed cross section
AssigneeKobe Steel, Ltd.
InventorReiichi Suzuki
Life of this patent
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Abstract
A lap fillet weld joint and a lap fillet weld joint manufacturing method are provided. On a side of a first edge, a first metal plate is provided with a bulging portion that has an internal space of a prescribed size, and a second metal plate has a protruding portion that faces to the bulging portion and can be inserted into the bulging portion. In a state in which the protruding portion has been inserted into the bulging portion, the first metal plate and a second edge of the second metal plate are welded, and a first weld bead is formed.
Claims21
A lap fillet weld joint produced by overlapping and welding a first metal plate and a second metal plate,
- wherein the first metal plate has a bulging portion on an edge portion on one side which is a side welded to the second metal plate, the bulging portion extending along a length direction from the edge portion on the one side toward an edge portion on the other side of the first metal plate, and bulging in a front surface side direction facing the second metal plate with respect to a flat plate portion so as to form an internal space on a back surface side of the first metal plate at the edge portion on the one side of the first metal plate,
- wherein the second metal plate has a protruding portion on an edge portion on one side which is a side welded to the first metal plate, the protruding portion protruding in a direction from an edge portion on the other side of the second metal plate toward the edge portion on the one side of the second metal plate, and configured to be inserted into the internal space of the bulging portion,
- wherein the lap fillet weld joint comprises a first weld bead formed by welding the first metal plate and the edge portion of the second metal plate on the one side of the first metal plate in a state where the protruding portion is inserted into the internal space of the bulging portion such that the first metal plate and the second metal plate are overlapped with each other in which a surface of the protruding portion comes into contact with a back surface of the bulging portion, and a portion of a back surface of the second metal plate on the edge portion on the one side of the second metal plate adjacent to and excluding the protruding portion comes into contact with a front surface of the first metal plate so that the second metal plate is held by the first metal plate, and
- wherein the bulging portion is formed such that a height of the first metal plate in a plate thickness direction is equal to or greater than a sum of a plate thickness of the first metal plate and a plate thickness of the second metal plate, and a length of the first metal plate in the length direction exceeds a sum of a leg length of the first weld bead between the first metal plate and the second metal plate and a length of a weld heat-affected zone extending from the first weld bead to the other side of the first metal plate.
1 more element
A production method of a lap fillet weld joint produced by overlapping and welding a first metal plate and a second metal plate, comprising:
- forming a bulging portion on an edge portion of the first metal plate on one side of the first metal plate, which is a side to be welded to the second metal plate, the bulging portion extending along a length direction from the edge portion on the one side toward an edge portion on the other side of the first metal plate, and bulging in a front surface side direction facing the second metal plate with respect to a flat plate portion so as to form an internal space on a back surface side of the first metal plate at the edge portion on the one side of the first metal plate;
- forming a protruding portion on an edge portion of the second metal plate on one side of the second metal plate, which is a side to be welded to the first metal plate, the protruding portion protruding in a direction from an edge portion on the other side of the second metal plate toward the edge portion on the one side of the second metal plate, and configured to be inserted into the internal space of the bulging portion;
- overlapping the first metal plate with the second metal plate while inserting the protruding portion into the internal space of the bulging portion such that the first metal plate and the second metal plate are overlapped with each other in which a surface of the protruding portion comes into contact with a back surface of the bulging portion, and a portion of a back surface of the second metal plate on the edge portion on the one side of the second metal plate adjacent to and excluding the protruding portion comes into contact with a front surface of the first metal plate so that the second metal plate is held by the first metal plate;
- and
- forming a first weld bead by welding the first metal plate and the edge portion of the second metal plate on the one side of the first metal plate,
- wherein the bulging portion is formed such that a height of the first metal plate in a plate thickness direction is equal to or greater than a sum of a plate thickness of the first metal plate and a plate thickness of the second metal plate, and a length of the first metal plate in the length direction exceeds a sum of a leg length of the first weld bead between the first metal plate and the second metal plate and a length of a weld heat-affected zone extending from the first weld bead to the other side of the first metal plate.
3 more elements
Dependencies are inferred from the claim text.