Abstract: The machine comprises a fixedly mounted holder maintaining the pipe in a position so that the end thereof which is to be formed extends in a horizontal plane. Two complementary or mating pins are insertable in this end of the pipe. Supporting and driving means are provided for moving the two pins in opposite directions for a distance corresponding to the deformation to be given to this end of the pipe.

Abstract: The machine comprises an endless guiding path for mobile supports equally spaced by a distance smaller than the length of the smallest heat exchanger to be brazed. The supports have protruding portions cooperating with the bottom on the same side of the end plates of the heat exchangers.

Abstract: The soldering alloy comprises at least:65 to 85% lead in weight12 to 30% cadmium in weight1 to 6% antimony in weight0.5 to 1% tin in weight.In a method for soldering metal parts, the parts are submitted to an organic flux on the portions thereof to be connected together, said portions are coated with the above mentioned soldering alloy, then they are heated to the liquidus temperature of the soldering alloy while being held together in contact.

Abstract: Tube ends are engaged in passage openings of tube plates and protrude above collars surrounding said passage openings. The larger sides of the tube ends are folded back and rolled about said collars. Part of the tube walls under said passage openings is enlarged.

Abstract: The soldering alloy comprises at least :65 to 85% lead in weight12 to 30% cadmium in weight1 to 6% antimony in weight0.5 to 1% tin in weight.In a method for soldering metal parts, the parts are submitted to an organic flux on the portions thereof to be connected together, said portions are coated with the above mentioned soldering alloy, then they are heated to the liquidus temperature of the soldering alloy while being held together in contact.

Abstract: A support plate is permanently fixed on the table of the press, which plate has mounted on the top thereof rollers, lateral guides and an abutment. Sets of tools are used, each of them comprising an upper tool and a lower tool. They are connected together by guiding columns and safety upright, so as to have always a constant total height. When being installed the sets of tools are located, or removed by moving the bed-plate of the lower tool on the rollers of the support plate. After placing and locating the tools, the bed-plate of the lower tool is clamped on the support plate and the bed-plate of the upper tool is clamped on the slide member of the press. After removal of the safety upright, the press is then ready to operate.

Abstract: The machine comprises a frame, a rotating gripper supported by the frame and comprising two arms provided with removable bearing plates for the end-plates of a radiator, pressing means maintaining the header boxes of the radiator on the end plates, and two heating units adjustably mounted on parallel shafts for the welding of these two parts.

Abstract: The machine comprises a rotary table supporting similar working stations. Each station supports a reference heat exchanger and a heat exchanger to be tested. The operations related to a simultaneous supply of compressed gas in the two exchangers, isolation of said exhangers, control of their residual pressure, etc... are controlled during a complete rotation of the table from fixed annular segments placed concentrically to the table and read by brushes supported by bars related to each working station.