Railway plug pin type connecting terminal welder and welding method thereof

Abstract

The invention discloses a railway plug pin type connecting terminal welder and a welding method thereof. The welder comprises a bottom support system and a radial friction welding device arranged on the bottom support system, wherein the radial friction welding device comprises a controller, a main shaft box, a main shaft arranged in the main shaft box, rotary clamps coaxially arranged at the front end part of the main shaft, a drive motor arranged at the rear part of the main shaft box, and an axial force application mechanism for applying an axial upsetting force to a welded connecting terminal through the main shaft box during welding. The welding method for the welder comprises the following steps: 1, machining and manufacturing the plug pin type connecting terminal; 2, manufacturing or selecting a welding hole; 3, mounting the welder; 4, shifting before welding; 5, performing radial friction welding; and 6, removing the welder. The welder has the advantages of small volume, convenience for carrying and taking and simple and convenient operation; the adopted welding method has the advantages of simple step and convenient implementation; and the welded connecting terminal has low connecting resistance and reliable connection.

Description

technical field [0001] The invention belongs to the technical field of fixed installation of railway rail terminal, and in particular relates to a railway plug-type terminal welding machine and a welding method thereof. Background technique [0002] At present, in the railway track circuit, the connection methods of various lead wires connected to the rail mainly include the following types: 1. The mechanical connection method of plugging the nail wire connection after drilling a hole on the rail, usually first punching in the middle of the rail hole, then drive the rail lead wire into the hole with a tight fit. 2. After drilling holes on the rail, use a riveting machine to realize the mechanical connection of the copper-inlaid sleeve and then pass through the bolt to connect the lead wire; 3. Welding and fixing methods such as explosive welding and thermite welding. Nowadays, the technical standards of railway passenger dedicated lines and freight heavy-duty speed-up are g...

AI Technical Summary

Problems solved by technology

[0003] In the above two mechanical connection methods of plug wire connection and copper inlaid sleeve, there must be a contact gap of at least 0.08mm between the installed terminal and the rail. Long-term use will gradually increase the contact resistance, especially under the action of high current. , the contact resistance is greater, which not only reduces the reliability of the rail lead wire, but also increases the precipitated resistance heat, which aggravates the oxidation and corrosion damage of the contact parts of the rail lead wire terminal, especially when rainwater intrudes. The oxidation corrosion damage is more serious

However, the operation steps of welding fixing methods such as explosive welding and thermite welding are complicated, and the slag inclusions, crystals produced after fusion welding, the temperature coefficient of the material to be welded, and the stress existing after welding, etc. Under the action of the generated vibration force, it is easy to cause loosening and desoldering of the fixed rail lead terminals, and poor contact also occurs from time to time, so that daily maintenance-free track lines cannot be realized, and driving safety is affected

To sum up, the existing connection methods of railway rail lead wires have various defects and deficiencies such as unreliable connection, easy corrosion and oxidation damage, complicated operation, easy loosening and poor contact, etc.

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