摘要:
Manufacturing method, welding arrangement and door frame structure for a door frame (21) of a windmill tower (10), wherein a hole (15) is made in the tower shell (10) for the door and a door frame is placed in the hole and welded on the shell. In the method, the shape of the door frame for the shell and the shape of the surface of the shell at the opening (15) to be made are measured with a measuring sensor (40). Based on the measurements, a cutting torch (41) is controlled so that an opening corresponding to the shape of the door frame is cut in the shell and bevels (16, 17) are cut in the edge of the opening on both sides. The door frame is welded on the shell with a weld (24), such as a double bevel, double J or square butt weld, from the inside and the outside of the shell.
摘要:
A spot welding apparatus which performs spot welding of a plurality of plate materials which are lapped to each other, comprises a displacement driving unit which displaces lapped portions of the plurality of plate materials and a tool relatively to each other; a rotation driving unit which rotates the tool; and a controller which controls the displacement driving unit and the rotation driving unit so that the tool is plunged into the lapped portions in a state in which the tool is rotated to perform friction stir spot welding. The controller controls the displacement driving unit so that at least one friction stir spot weld is formed in a region of the lapped portions which is between a plurality of resistance spot welds formed by resistance spot welding.
摘要:
A lap welding method of a steel sheet includes spot welding in a state in which the flange portion of a second steel sheet member having the flange portion and a standing wall portion is overlapped with the first steel sheet member, thereby forming a nugget between a first steel sheet member and a flange portion; and, after the spot welding, laser welding a region between an R stop of the standing wall portion and the nugget, thereby forming a weld bead, and, in the weld bead, a length dimension is equal to or longer than a diameter of the nugget, and a width dimension is 0.5 to 3.0 mm.
摘要:
An electric melting method for forming metal components. The method provides an electric melting head (6) and a base material (2) being connected to the anode and the cathode of a power supply (12). During the forming of the component, the raw metal wire (1) is sent to the base material (2) via the feeder (5) and the electric melting head (6) to generate electric arc (9) between the raw wire (1) and the base material (2) under the protection of the deposition of granular auxiliary material (3). The electric arc melts a part of the deposited auxiliary material (3) and creates a molten slag pool (8). Electric current flows through the raw wire (1) and the molten slag pool (8), and generates the resistance heat and the electroslag heat. The raw wire (1) is molten under the high-energy heat resource composed of the electric arc heat, the resistance heat and the electroslag heat, and thereby creating a molten pool (11) on partial surface of the base material (2). The raw wire (1) and the auxiliary material (3) are fed continuously and a computer is employed to control the relative movement of the electric melting head (6) and the base material (2) based on laminated slicing data, such that the molten pool (11) is rapidly cooled, solidified and deposited on the base material (2), and thus the metal component with desired shape and size are formed after the layer-to-layer deposition.
摘要:
An electric melting method for forming a cylinder of a pressure vessel of nuclear power station, in which an electric melting head and a base material are connected to the anode and cathode of a power supply respectively. During the forming of a metal component, the raw metal wire is sent to a surface of the base material by a feeder and the electric melting head to create the electric arc between the raw wire and the base material under the protection of the deposit of granular auxiliary material, wherein the electric arc melts certain of deposited auxiliary material and crates a molten slag pool; a current flows through the raw wire and the molten slag pool to create the resistance heat and the electroslag heat; the raw wire is molten under the high-energy heat resource composed of the electric arc heat, the resistance heat and the electroslag heat, and creates a molten pool on partial surface of the base material; the raw wire and the auxiliary material are continuously fed and a computer is used to control the relative movement between the electric melting head and the base material based on laminated slice data of the formed components, such that the molten pool is rapidly cooled, solidified and deposited on the base material and thus forms the cylinder of the pressure vessel of the nuclear power station. Such method is high efficiency and low cost, as well as excellent mechanical performance.
摘要:
Provided are butt welds and methods of making such butt welds using a combination of fusion root welding and friction stir welding to yield welds with decreased propensity for dropout during friction stir welding without the need for a back-up support plate. In one form of the present disclosure, the butt weld includes: two or more abutting structural steel components beveled on faying surfaces on one side of the components to form a suitably shaped fusion root weld groove and unbeveled on faying surfaces on the opposite side of the components and interconnected with a first fusion root weld on the beveled side of the components and a second friction stir weld on the unbeveled side of the components, wherein the first fusion root weld has a width ranging from 7 mm to 30 mm, a penetration depth ranging from 2 mm to 20 mm, and an overfill ranging from 2 mm to 5 mm, and wherein the stir zone of the second friction stir weld penetrates the first fusion root weld. The butt welds and methods of making find application in joining linepipe for oil and gas production.
摘要:
An electric melting method for forming a cylinder of a pressure vessel of nuclear power station, in which an electric melting head and a base material are connected to the anode and cathode of a power supply respectively. During the forming of a metal component, the raw metal wire is sent to a surface of the base material by a feeder and the electric melting head to create the electric arc between the raw wire and the base material under the protection of the deposit of granular auxiliary material, wherein the electric arc melts certain of deposited auxiliary material and crates a molten slag pool; a current flows through the raw wire and the molten slag pool to create the resistance heat and the electroslag heat; the raw wire is molten under the high-energy heat resource composed of the electric arc heat, the resistance heat and the electroslag heat, and creates a molten pool on partial surface of the base material; the raw wire and the auxiliary material are continuously fed and a computer is used to control the relative movement between the electric melting head and the base material based on laminated slice data of the formed components, such that the molten pool is rapidly cooled, solidified and deposited on the base material and thus forms the cylinder of the pressure vessel of the nuclear power station. Such method is high efficiency and low cost, as well as excellent mechanical performance.