Method for determining welding shrinkage of H-type longitudinal beam

A technology for determining the method and amount of shrinkage, applied in welding equipment, auxiliary welding equipment, welding/cutting auxiliary equipment, etc., can solve problems such as waste of materials and man-hours, inability to accurately control the length of longitudinal beams after welding, and hidden quality problems
CN107957979AActive Publication Date: 2018-04-24SANJIANG VOLAT SPECIAL VEHICLE
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SANJIANG VOLAT SPECIAL VEHICLE
Publication Date
2018-04-24

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Abstract

The invention discloses a method for determining the welding shrinkage of an H-type longitudinal beam. The method comprises the steps that the length, cross section area, weld area and welding shrinkage of a preset number of welded H-type longitudinal beams are counted; based on a shrinkage calculation formula, the welding shrinkage coefficient of each welded H-type longitudinal beam is calculated; averaging operation is conducted on the welding shrinkage coefficients of the preset number of welded H-type longitudinal beams, and a first welding shrinkage coefficient is obtained; the length, cross section area and weld area of an H-type longitudinal beam to be machined are determined, the first welding shrinkage coefficient is used as the welding shrinkage coefficient of the H-type longitudinal beam to be machined, and the welding shrinkage of the H-type longitudinal beam to be machined is calculated out based on the shrinkage calculation formula. By means of the method, the welding shrinkage of the H-type longitudinal beam can be precisely determined, so that the blanking length of a corresponding part is determined, and it is unnecessary to conduct cutting machining after weldingto enable the length of the longitudinal beam to meet a design requirement.
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Description

technical field

[0001] The invention relates to the technical field of welding of H-shaped longitudinal beams, in particular to a method for determining the welding shrinkage of H-shaped longitudinal beams. Background technique

[0002] The longitudinal beams of the chassis frame of oilfield special vehicles are H-shaped welded structures, and most of the longitudinal beams are added with 4000-10000mm reinforcing plates in the same direction as the webs to improve local strength. Due to the shrinkage of welding, in order to ensure the design length after welding, a 50mm machining allowance was initially reserved for cutting after welding. This method not only wastes materials and man-hours, but also has the problem that the web body at the junction of the wing plate and the web may be cut due to the on-site cutting, and there is a quality risk. The empirical method to determine the reserved amount also has the same problem that the length of the longitudinal beam after weld...

Claims

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