A joining-member welding unit includes a first member made of metal, a second member overlapped with one surface of the first member, a joining member made of the same kind of metal as the first member, and a welder. The second member has a through-hole defined by an inner wall surface thereof. The inner wall surface and the one surface define a recessed portion. The joining member includes a large-diameter plate portion having an outer diameter larger than a diameter of the through-hole and a thickness smaller than the diameter of the through-hole, and a protruding portion protruding from the large-diameter plate portion and to be inserted into the through-hole. The welder includes a holding portion that holds the joining member. The welder applies an electric current to the joining member to melt the protruding portion such that the first member and the second member are joined together.

A method of repairing a casing for a gas turbine engine, wherein the casing has a wall extending generally axially, and between at least one radially extending flange, the radially extending flange being formed with a plurality of bolt holes, includes the steps of removing a portion of the flange including at least one bolt hole. The removed portion is associated with a defect and a remaining portion of the flange includes at least one non-removed bolt hole. A replacement portion is obtained to replace the removed portion. The replacement portion is secured in an opening left in the flange by the removed portion. A repaired gas turbine engine casing is also disclosed.

A method of repairing a casing for a gas turbine engine, wherein the casing has a wall extending generally axially, and between at least one radially extending flange, the radially extending flange being formed with a plurality of bolt holes, includes the steps of removing a portion of the flange including at least one bolt hole. The removed portion is associated with a defect and a remaining portion of the flange includes at least one non-removed bolt hole. A replacement portion is obtained to replace the removed portion. The replacement portion is secured in an opening left in the flange by the removed portion. A repaired gas turbine engine casing is also disclosed.

A method for electrically connecting an energy storage cell includes providing at least one electrical energy storage cell, comprising a first connecting pole, arranging the first connecting pole and a first contact element to each other for forming a first contact point and closing an electrical circuit over the at least one energy storage cell and utilizing the electrical energy stored in the energy storage cell for producing a welding connection at the first contact point.

A method for electrically connecting an energy storage cell includes providing at least one electrical energy storage cell, comprising a first connecting pole, arranging the first connecting pole and a first contact element to each other for forming a first contact point and closing an electrical circuit over the at least one energy storage cell and utilizing the electrical energy stored in the energy storage cell for producing a welding connection at the first contact point.

The present disclosure discloses a light-transmittance device and a use method, and belongs to the technical field of manufacturing of rotary equipment. The light-transmittance device includes cylinder sections, a two-column vertical lathe, and a vertical lathe platform; T-shaped supporting fixtures are arranged inside the cylinder sections; light-transmittance tools are arranged at center positions of the cylinder sections; two ends of the cylinder sections are provided with rolling ring base plates which are paired and mounted with the cylinder sections; a roller frame is arranged on a lower side of each group of cylinder section; furthermore, the rolling frames are slidably connected with a rigid rail; a theodolite is arranged on one side close to the cylinder sections; and a triangular bracket and a light-transmittance platform are arranged on a lower side of a shell of the theodolite.

The present disclosure discloses a light-transmittance device and a use method, and belongs to the technical field of manufacturing of rotary equipment. The light-transmittance device includes cylinder sections, a two-column vertical lathe, and a vertical lathe platform; T-shaped supporting fixtures are arranged inside the cylinder sections; light-transmittance tools are arranged at center positions of the cylinder sections; two ends of the cylinder sections are provided with rolling ring base plates which are paired and mounted with the cylinder sections; a roller frame is arranged on a lower side of each group of cylinder section; furthermore, the rolling frames are slidably connected with a rigid rail; a theodolite is arranged on one side close to the cylinder sections; and a triangular bracket and a light-transmittance platform are arranged on a lower side of a shell of the theodolite.

Hybrid manual and automated welding systems and methods are described. A hand-held welding tool is manually positioned to engage a workpiece. The hand-held welding tool includes a motion device that is configured to automatically move a contact tip or a welding heat source during a welding operation after a manual triggering. A welding arc is automatically and repeatedly turned off and on to make a string of overlapping and equally spaced spot welds while the contact tip or the welding heat source moves from the first position to the second position.

Disclosed herein is an adhering structure of different materials. The adhering structure can be used for integrally adhering a non-ferrous metal plate and a steel metal plate to each other. A tubular element is configured to penetrate through an adhesion hole of the non-ferrous metal plate and to support a surface of the steel metal plate. A welding part is formed in an internal hollow of the tubular element and includes an inner surface portion of the tubular element and forms a surface portion of the steel metal plate. The welding part is formed from a material that provides a molten pool of a filler metal during a welding process.

Disclosed herein is an adhering structure of different materials. The adhering structure can be used for integrally adhering a non-ferrous metal plate and a steel metal plate to each other. A tubular element is configured to penetrate through an adhesion hole of the non-ferrous metal plate and to support a surface of the steel metal plate. A welding part is formed in an internal hollow of the tubular element and includes an inner surface portion of the tubular element and forms a surface portion of the steel metal plate. The welding part is formed from a material that provides a molten pool of a filler metal during a welding process.