Method for correcting welding deformation of large plate-type structural piece

A technology of welding deformation and structural parts, which is applied in the field of correction of welding deformation of large-scale plate-shaped structural parts, to achieve the effect of meeting the requirements of correction accuracy, saving investment, and reducing operation level requirements

Active Publication Date: 2012-06-20
YICHANG JIANGXIA MARINE MACHINERY
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  • Abstract
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a correction method for welding d

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  • Method for correcting welding deformation of large plate-type structural piece
  • Method for correcting welding deformation of large plate-type structural piece
  • Method for correcting welding deformation of large plate-type structural piece

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Embodiment

[0036] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0037] Taking the correction of a hydraulic platform as an example, the workpiece 1, the platform, is the main load-bearing component of the hydraulic platform, and its maximum external dimensions (length × width × height) are 11000 × 3500 × 115mm. It is a dense hollow rectangular steel frame with continuous welding seams. Sticking and welding a whole piece of t35mm steel plate (machined to t30mm after welding), is a typical "plate-shaped structural part". Such as figure 1 , figure 2 shown in . The precision requirements of the entire plane after processing are flatness ≤ 1.5mm, parallelism between the upper and lower sides of the platform ≤ 0.5mm, and the thickness difference of the upper flat steel plate (t30mm) ≤ 3mm. If the above requirements cannot be guaranteed, it will bring unstable factors to the installation and use of the whole platfor...

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Abstract

The invention relates to a method for correcting the welding deformation of a large plate-type structural piece, which comprises the following steps that: the deformation quantity of a work piece is measured, and the maximum deformation position is marked; a certain number of process cushion blocks are arranged below the work piece with a certain spacing, and are adjusted to different heights; the top ends of all the process cushion blocks are connected, so that the work piece produces a certain anti-deformation quantity; the work piece is heated in a furnace, so that the work piece has preset plastic deformation; and the method is adopted for correcting the welding deformation of the large plate-type structural piece. The method for correcting the welding deformation of the large plate-type structural piece has the beneficial effects that: 1. the work piece is heated in the furnace and an anti-deformation method is also adopted, so that the correction precision requirements of the large work piece can be met, and the quality is stable; 2. the heat treatment equipment of a factory is utilized, no large hydraulic machinery needs to be purchased, so that investment is saved; and 3. the safety is high, and the operation level requirements on personnel can be reduced.

Description

technical field [0001] The invention relates to a method for correcting plate-shaped structural parts in mechanical equipment, in particular to a method for correcting welding deformation of large-scale plate-shaped structural parts. Background technique [0002] The welding deformation of the existing mechanical parts manufactured by welding method is unavoidable. For example, if the welding deformation of large platform-shaped parts is large, the quality of its deformation correction will directly affect the processing and assembly accuracy of the product, and the uneven thickness of the platform panel will affect the stability and safety of the turning platform. [0003] At present, the welding deformation of small structural parts can be corrected directly by hydraulic press, but the hydraulic press has certain requirements on the external dimensions of the workpiece; for larger structural parts, local heating with flames is often done manually or when the deformation of...

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Application Information

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IPC IPC(8): B21D1/00
Inventor 罗中喜
Owner YICHANG JIANGXIA MARINE MACHINERY
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