Shield tail positioning device for shield machine

Abstract

The invention discloses a shield tail positioning device of a shield machine, which comprises a positioning frame and a fixing plate. The positioning frame has an arc-shaped positioning groove for supporting an arc-shaped plate, and the edge of the arc-shaped positioning groove is provided with several fixing holes. When fixing the arc-shaped plate, first place the arc-shaped plate in the arc-shaped positioning groove, then fix one end of the fixed plate in any fixing hole, and the other end is engaged with the end of the arc-shaped plate to prevent the circumference of the arc-shaped plate from Rotate to facilitate drilling arc-shaped plate; after drilling, loosen the fixed plate, the fixed plate is out of contact with the arc-shaped plate, rotate the arc-shaped plate along the circumferential direction, and then make the end of the fixed plate and the arc-shaped plate meet Clamping, and drilling the arc plate again; in this way, until the drilling process is completed, there is no need to use the grease plate during the processing of the arc plate, to prevent the welding of the grease plate, which is beneficial to reduce the deformation of the shield tail, thereby improving the shield tail Processing accuracy and processing quality.

Description

technical field [0001] The invention relates to the technical field of shield machine processing, in particular to a shield tail positioning device for a shield machine. Background technique [0002] The shield machine is mainly used in tunnel construction. It is a split-type thin-shell cylindrical structure formed by welding multiple arc-shaped plates. Each arc-shaped plate needs to process multiple sets of grease holes. [0003] The processing plan of the existing shield tail is as follows: first install the grease plate, and process deep holes on the grease plate; then, draw a line on the cylindrical shield tail to assist in opening the grease plate installation hole; and then weld the grease plate to the cylindrical shield on end. [0004] However, there are still deficiencies in the above-mentioned processing scheme of the shield tail. For example, welding the grease plate after opening the grease plate installation holes will easily lead to deformation of the shield ...

AI Technical Summary

Problems solved by technology

[0004] However, there are still deficiencies in the above-mentioned processing scheme of the tail of the shield

For example, welding the grease plate after opening the grease plate installation holes will easily lead to deformation of the shield tail. At the same time, relatively more welding of the shield tail will also easily affect the deformation of the shield tail, making it difficult to control the dimensional tolerance and roundness of the shield tail, thus Affect the processing accuracy and processing quality of the shield tail

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