Technique for integrally manufacturing semi-structure of full-face tunneling machine shield

Abstract

The invention discloses a technique for integrally manufacturing a semi-structure of a full-face tunneling machine shield applied to the field of a full-face tunneling machine. A front shield is separated into a left half body, a right half body and a lower half body, wherein three pairs of coupling flanges are arranged; the coupling flanges are firstly processed and then each pair of flanges is closed by a process bolt to be as a combined element to be welded into a whole together with each half body; in order to prevent a flange surface from separating to generate a crack and deformation during overall heat treatment, a dense steel plate tie bar is welded to connect on a seam of inner and outer shell plates; the steel plate tie bar is cut off, polished and repaired after thermal treatment according to the processing situation so as to ensure the shield achieves the shape tolerance requirements. According to the technique, the defects of the conventional technique for manufacturing the shield of the semi-structure can be overcome; the coupling flanges are processed one by one, and two flanges are merged into a whole and welded with the steel plate on the shield by the process bolt, so that the problems that the welding is easy to deform are solved, the excircle geometrical tolerance is difficultly ensured, the processing cost is high, the processing difficulty of the flange is large and each half body is difficultly closed.

Description

technical field [0001] The invention relates to a process method for integrally manufacturing a half-structure shield body of a full-section roadheader in the field of full-section roadheaders. Background technique [0002] In the field of full-section roadheaders, for different diameters and considering construction and transportation reasons, the shield body of the roadheader requires a full-section roadheader with a split-half structure. The traditional manufacturing method of the shield body is: welding the halves first, and then processing Good flange, finally use bolts to connect, the disadvantages of this method are: welding is easy to deform, processing is difficult, the construction period is long, and the tolerance of the outer circle is difficult to guarantee. For example, the double-shield hard rock roadheader, considering the transportation size and possible accidents in the tunnel construction, requires the shield body to adopt a split structure. Due to the str...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a process method for integrally manufacturing the half-structure shield body of a full-face boring machine, which overcomes the defects caused by the traditional process method for making a half-structure shield body. Bolts combine the two flanges into one body and weld them to the steel plate on the shield body, which solves the problems of easy deformation of welding, difficulty in ensuring outer circular position tolerance, high processing cost, difficulty in processing flanges, and difficulty in joining the halves

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