Double-head heating necking method and necking device thereof for thick-wall round tubes

Abstract

The invention discloses a double-head heating necking method for thick-wall round tubes and a necking device implementing the method. The necking device comprises an automatic control system, a clamping device, heating devices, pressure devices and a material taking device, and the clamping device, the heating devices, the pressure devices and the material taking device are respectively connected with the automatic control system and controlled by the same. The method is simple in work procedure and high in automation degree, and the thick-wall round tubes can be fully automatically and quickly manufactured by the method. The necking device is simple in structure, feeding, heating, necking and discharging procedures are automatically carried out owing to application of mechanical automation, and labor intensity is relieved while production efficiency is greatly improved. In addition, as mold pressing necking processing is adopted, thicker metal wall layers are formed at necking portions under the extrusion effect of a mold, breakage of the necking portions is prevented when the metal tubes are turned, the quality of the products is guaranteed, and competitiveness of an enterprise is strengthened.

Description

technical field [0001] The invention relates to a round pipe double-head heating necking technology, in particular to a thick-walled round pipe double-head heating necking method and a necking device. Background technique [0002] The necking round tube is the reducing tube, which is a pipe fitting used for the straight connection of two pipes of different sizes to realize the diameter reduction of the pipe. Most of the existing constricted round pipes are forged pipe fittings, and the pipe walls are all the same. During lathe processing, the phenomenon of fracture of the constricted part is prone to occur, which affects the product quality. [0003] However, with the improvement of living standards, people's demand for necked round pipes is increasing. The traditional forging process is used to produce necked round tubes, the output is low, and most of them are artificial perfusion methods, which are slow, heavy workload, high repeatability, resulting in increased labor in...

AI Technical Summary

Problems solved by technology

The traditional forging process is used to produce necked round tubes, the output is low, and most of them are artificial perfusion methods, which are slow, heavy workload, high repeatability, resulting in increased labor intensity, easy to make people tired, and prone to accidents. products, there is a lot of material waste, and the labor cost is high

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