Method for controlling deformation of principal welding seam of ship crane

A technology of welding deformation and control method, which is applied in welding equipment, manufacturing tools, metal processing equipment, etc., to achieve the effect of reducing production costs, reducing production costs, and promoting application prospects.

Active Publication Date: 2013-02-13
WUHAN MARINE MACHINERY PLANT
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Problems solved by technology

However, after welding according to the existing welding process, the large bottom plate of the tower body will often be greatly deformed, resulting in the flatness of the slewing bearing being out of tolerance. Processing, which not only increases the manufacturing cost, but also has a very large impact on the production cycle

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  • Method for controlling deformation of principal welding seam of ship crane
  • Method for controlling deformation of principal welding seam of ship crane
  • Method for controlling deformation of principal welding seam of ship crane

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Embodiment Construction

[0017] Next, embodiments of the present invention will be specifically described.

[0018] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, the present invention adopts the process of controlling welding deformation, and the process of controlling welding deformation includes: 1) controlling the welding current, transforming the welding machine used for the welding of the gram lifting buckle tower, installing a current limiting device, and controlling the welding machine through the current limiting device 2) Reduce the welding deformation caused by welding heat, adopt symmetrical welding process, formulate the welding sequence of symmetrical welding, and disperse the welding process Grasp the heat input caused by the large bottom plate of the lifting tower; 3) Predict the deformation point, and use the anti-deformation process for the predicted deformation point to reduce the deformation after welding. The anti-deformation process adopted is to set tooling a...

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Abstract

The invention relates to a method for controlling the deformation of a principal welding seam of a ship crane. A welding deformation controlling technique is adopted and comprises the following steps: 1) controlling welding current, improving a welding machine for welding a crane tower, installing a current-limiting device, controlling welding current of the welding machine, and reducing the input of welding heat produced by welding to a welded part; 2) reducing welding deformation due to the welding heat, adopting a symmetric welding technique, formulating a welding sequence of the symmetric welding, and scattering heat input affecting on a large base plate of the crane tower during welding; and 3) predicting deformation points, adopting a reverse deformation technique according to the predicted deformation points, and reducing the amount of deformation after the finishing of the welding. The method has the advantages of novel design, convenience and easiness in implementation, good process effect, reduction in production cost and guarantee on welding quality. Therefore, the the method has good popularization and application prospects.

Description

technical field [0001] The invention relates to a method for controlling welding seam deformation, in particular to a method for controlling main welding seam welding deformation of a marine crane. technical background [0002] Existing marine cranes are also known as marine deck cranes, which are large-scale deck machinery used on ships, and are mainly used for loading and unloading cargo on ships. The main structure of the marine crane is divided into boom structure, tower structure, base column structure and so on. Among them, there is a precise coordination relationship between the tower body structure and the base column structure, such as figure 1 As shown, this precise matching relationship refers to the matching relationship between the slewing bearing and the flange of the base column. During the operation of the marine crane, the matching surface of the slewing bearing and the flange of the base column will be greatly affected. Alternating load; if the fit gap ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
Inventor 董诚祝道文王良
Owner WUHAN MARINE MACHINERY PLANT
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