Expansion pulling device for steel framed side wallboard of carriage

Abstract

The invention relates to a tensioning and pulling device for a lateral wallboard with a steel structure of a railroad car. The device comprises positioning clamp heads and moving clamp heads symmetrically distributed at equal distances on both longitudinal ends of the lateral wallboard. Each of the clamp head consists of a lower clamp block, an upper clamp block, a rotating shaft, a stop block, aclamping lead screw and a pulling hook. The positioning clamp heads and the moving clamp heads distributed at equal distances are used for directly clamping the lateral wallboard for tensioning and pulling, and a tensioning and pulling technical board is saved; the tensioning and pulling device has the advantages of saving the material of steel boards and reducing production cost. The clamp headshave enough tensioning and pulling clamp force by adopting self-locking type structures. The relatively independent clamp heads are convenient to carry out corresponding tensioning and pulling displacement for clamped positions according to the tightness required for the lateral wallboard; thereby, the device ensures that the tightness degree of the tensioned and pulled lateral wallboard in the longitudinal direction of a car body is basically conformable.

Description

technical field [0001] The invention relates to a tensioning device for a steel structure side wall panel of a railway passenger car, which belongs to the technical field of passenger car manufacturing. Background technique [0002] The steel structure of the side wall is an important part of the steel structure of the railway passenger car body. The weight of the car body is carried by the overall load of the car body through the side wall columns. The side wall steel structure is composed of external side wall panels, internal longitudinal beams, and column skeletons. The side wall panels must be integrated with the columns through back plug welding (segment welding) under tension. At present, when the side wall panels are stretched and pulled, the side wall panels must first be welded to the process plates at both ends. The process hole is inserted into the process hole with a screw for clamping, and then the process plate and the side wall plate on it are expanded and p...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the process board needs to be replaced every time a side wall panel is stretched, and the production cost is very high. The elongation is the same, but in fact the degree of tightness of the side wall panels along the longitudinal direction of the car body is different, resulting in different degrees of tightness of the side wall panels after stretching, and even unevenness of the wall panels in severe cases

It is difficult for the side wall panel after tension welding to meet the requirement of 1.5mm / m appearance flatness

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