Abstract: A weld cutting machine having a first cutting jaw part (4) and a second cutting jaw part (5), a base frame (500) having fixedly attached thereto the second cutting jaw part (5), a power unit and a transmission mechanism (3). The power unit is connected to the transmission mechanism (3) to arrange for movement of at least one of the first cutting jaw part or the second cutting jaw part (4, 5).

Abstract: A dedicated V-shaped groove forming machine comprises an X-axis slider disposed over a plate material so as be movable in an X-axis (groove forming direction); a Z-axis slider supported by the X-axis slider so as to be movable in a Z-axis direction (vertical direction); and plural cutting tools mounted on the Z-axis slider; and a Y-axis carriage for moving a plate material (workpiece) in a Y-axis direction (perpendicular to the X-axis direction). Further, there are provided work table adjusting device for adjusting the cutting tool movement locus in parallel to the work table and tool height detecting device for determining an origin in the Z-axis direction, etc.