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Improved welding process for casting block of tail shield of shield tunneling machine

A technology of welding process and grouting block, which is applied in the field of shield machine, can solve the problems of increased leveling workload and difficulty of riveters, unreasonable welding method and process, large deflection and deformation, etc., so as to reduce cost and quality risk, Reduce the leveling difficulty of riveters and control the quality

Inactive Publication Date: 2020-01-10
济南重工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large aspect ratio and unreasonable welding method and process, the deflection and deformation of the grouting block after welding are large, which increases the workload and difficulty of riveter leveling, and may easily lead to weld cracking during the leveling process

Method used

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  • Improved welding process for casting block of tail shield of shield tunneling machine
  • Improved welding process for casting block of tail shield of shield tunneling machine
  • Improved welding process for casting block of tail shield of shield tunneling machine

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Embodiment Construction

[0015] The present invention will be specifically described below in conjunction with the accompanying drawings and embodiments.

[0016] figure 1 Shown is the schematic cross-section of the welded grouting block of the present invention Figure 1 .

[0017] figure 2 Shown is the schematic cross-section of the welded grouting block of the present invention Figure II .

[0018] image 3 Shown is the structural representation of the welded grouting block of the present invention Figure 1 .

[0019] Figure 4 Shown is the structural representation of the welded grouting block of the present invention Figure II .

[0020] The tail shield grouting block of the shield machine is formed by cutting two pieces of δ55×82.5×3813mm (or two pieces of δ55×106×3813mm and one piece of δ55×130×3813mm) long steel plates and then welding them.

[0021] The invention provides an improved shield machine tail shield grouting block welding process, comprising the following steps:

[0...

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Abstract

The invention discloses an improved welding process for a casting block of a tail shield of a shield tunneling machine. The improved welding process comprises the following steps that steel plates areassembled according to a drawing to form the casting block; grooves in the two sides of the casting block are machined; and the side A of the casting block is welded through multi-layer single-pass and section-by-section backstep welding under a small current, the casting block is turned over after one layer is welded, the side B of the casting block is welded in the same way, and the step is repeated until two layers are welded on the side B and three layers are welded on the side A, so that welding of the casting block is completed. The improved welding process has the advantages that resources are saved, costs are reduced, and the quality is effectively controlled. Bending deformation of the casting block after welding is reduced, the leveling difficulty is reduced for rivet workers, the welding quality of the casting block is guaranteed, and unnecessary costs are reduced.

Description

technical field [0001] The invention relates to an improved tail shield grouting block welding process of a shield machine, belonging to the technical field of shield machines. Background technique [0002] Since the tail shield grouting block of the shield machine is made of two pieces of δ55×82.5×3813mm (or two pieces of δ55×106×3813mm and one piece of δ55×130×3813mm) strip-shaped steel plates, processed and then welded, after welding, The grouting block is subjected to a hydrostatic test, the test pressure is 10Bar, there is no water seepage and the pressure drop does not exceed 0.5Bar within 30 minutes. The existing grouting block welding method is multi-layer single-pass welding, welding current 250-280A, welding voltage 30-34V, the grooves on both sides of the grouting block are not equal, and the groove depths are 10mm on the B side and 15mm on the A side. Reinforcement before welding. Welding requires one layer of 10mm on side B and two layers of 15mm on side A. Fir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/00B23K37/00
CPCB23K31/00B23K37/00
Inventor 郝小冬纪克玲高瑞兰
Owner 济南重工集团有限公司
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