Abstract: A method and apparatus for welding edge bars (4, 5) to the ends of the support bars and filling bars of bar grates (6, 7) is disclosed. The apparatus includes two rollerway sections (1, 2) on either side of a work station. A lift device (3) supports two edge bars (4, 5) and is moveable into and out of the region of the work station. A welding device (8) is also moveable into and out of the region of the work station. Stop bars (12, 14) are provided for aligning the grates (6, 7) in a longitudinal direction. The bar grates (6, 7) are aligned in the other direction against the edge bars (4, 5). Rollers (17, 18) are pivotable into and out of the work station area to transfer a first bar grate (6) to the second roller section (2) after a welding operation.

Abstract: A turret head for a rotary turning machine having a base rotatably mounted on a cross-slide for movement about a first axis. The turret head is mounted to the base for rotatable movement relative thereto about a second axis that is inclined to the first axis by an angle .alpha.. The turret head includes two rings or annular arrays of tool holders. Each ring has its tools disposed so that their axes lie on the surface of an imaginary cone having a vertex angle of 2.beta., such that .alpha. + .beta. = 90.degree.. The two imaginary cones have their axes coincide with the second axis and preferably the vertices of the cones coincide, so that the cones are mirror images of each other.