Straightening machine and copper-magnesium alloy contact line production process

Abstract

The invention relates to a straightening machine and a copper-magnesium alloy contact line production process. The straightening machine comprises a case, and a plurality of driven wheels and a plurality of driving wheels which are arranged in the case, wherein a case door is hinged on one side of the case; the plurality of driven wheels are arranged side by side, and the plurality of driving wheels are also arranged side by side; the driving wheels are arranged on the upper sides of the driven wheels; the driving wheels and the driven wheels are arranged in a staggered manner; the end faces of the two sides of the case are respectively provided with a through hole for a casting rod to penetrate through; the driving wheels and the driven wheels are in contact with one another; the drivingwheels are driven by a motor; a milling cutter is installed at the through hole through which the casting rod is discharged from the case; the driving wheels are driven to rotate by the motor arrangedon the back side of the case; and a liquid spraying pipe for cooling the milling cutter is arranged on the case. According to the straightening machine, the casting rod can be straightened, the straightness degree of the casting rod is increased, and as-cast crystal grains in the casting rod are convenient to break and disperse when the casting rod is continuously extruded.

Description

Technical field [0001] The invention relates to the technical field of cable production and processing, in particular to a straightening machine and a copper-magnesium alloy contact wire production process. Background technique [0002] Electrified railway contact wire is one of the power supply wires used in the harshest working environment. It has a large rated working tension and is constantly subjected to the impact and friction of the pantograph during long-term operation, and needs to endure arc ablation and temperature changes. As well as the impact of the environment, the contact wire is required to have high tensile strength, good wear resistance and electrical conductivity. In practical applications, the production cost and capacity of the wire must also be considered. High-speed railways all use copper alloy contact wires. At present, my country basically uses copper-magnesium alloy contact wires in the construction of high-speed electrified railways above 300km / h. [...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing technical solutions have the following defects: in the actual production of copper-magnesium alloy contact wires, during the continuous casting process, the contact wires need to be extruded from the crystallizer. Therefore, there will be some unevenness on the surface of the contact line, which will affect the subsequent extrusion and drawing, and cause more defects on the drawn contact line.

The contact line extruded from the crystallizer is the cast rod (cast rod), which needs to be continuously extruded. Once the cast rod is bent, during the extrusion process, the cast grains in the cast rod will be partially aggregated together. , forming larger as-cast grain clusters, affecting the subsequent drawing and the overall strength of the cast rod

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