Railway wagon chassis manufacturing process and chassis bidirectional automatic clamping device

By applying railway freight car underframe manufacturing technology and a bidirectional automatic clamping device for the underframe, automated manufacturing of the underframe has been achieved, solving the problems of low efficiency and high cost in existing technologies, and realizing efficient and automated production of open wagon and flatcar underframes on the same production line.

CN119635053BActive Publication Date: 2026-06-09XI AN RAILWAY TRANSPORTATION EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN RAILWAY TRANSPORTATION EQUIP
Filing Date
2024-12-30
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

The existing manufacturing process for railway freight car underframes requires the use of overhead cranes for transfer, and the entire process is manual, resulting in high efficiency and low cost. Furthermore, the existing underframe clamping and flipping technology cannot adapt to automatic clamping of the underframe, leading to waste in the manufacturing process and inability to adapt to automated production.

Method used

A railway freight car underframe manufacturing process and a bidirectional automatic clamping device for the underframe are adopted. The automated manufacturing of the underframe is achieved through an RGV automatic transfer process car and a gantry tilting device. The process includes steps 1-7. The bidirectional automatic clamping device for the underframe is used for bidirectional clamping and tilting. The self-locking of the clamping hook is achieved by using an electric hydraulic cylinder and a self-locking pin.

Benefits of technology

It has enabled automated manufacturing of railway open wagons and flat wagon chassis on the same production line, reducing equipment and site investment, shortening turnaround time, improving manufacturing efficiency, and reducing labor intensity and costs.

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    Figure CN119635053B_ABST
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Abstract

The railway wagon chassis manufacturing process and the chassis bidirectional automatic clamping device comprise the following steps: step 1, the chassis beam groups are sent to the front automatic welding station for welding; step 2, the chassis middle beam is clamped by the chassis bidirectional automatic clamping device of the turnover automatic welding station for welding; step 3, the chassis floor plate assembly is carried out at the floor plate assembly station; step 4, the chassis floor plate assembly is carried out at the floor plate assembly station; step 5, the chassis is turned over by 180 degrees through the back automatic welding station, and the welding seam of the turned over chassis is welded; step 6, the welding seam of the floor plate back is welded at the floor plate back welding station; and step 7, the welding seam of each turnover position is manually supplemented and welded, and the railway wagon chassis manufacturing is completed at the front automatic welding station. The railway wagon chassis manufacturing process does not need to adopt a crown block for sequence conversion, and can realize automatic manufacturing of railway open wagons and railway flat cars on the same production line.
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