Biaxial bending deformation device and processing method for processing welded joint

A technology of welding joints and bending deformation, which is applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problems of discontinuous joint structure, uneven joint structure, and reduced mechanical properties of joints, and achieve the elimination of welding residual stress and unsatisfactory Effects of Continuity and Stress Concentration

Active Publication Date: 2015-08-05
无锡市通瑞电力自动化设备有限公司
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  • Abstract
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Problems solved by technology

[0003] ①The discontinuity of the shape of the joint will inevitably cause stress concentration at the junction of the reinforcement and the base metal;
[0004] ②The discontinuity of the joint structure, the grain structure of the heat-affected zone of the magnesium alloy joint is coarser than that of the weld and the base metal, and the structure of the entire joint is uneven and discontinuous;
[0005] ③ Due to the shrinkage of the weld metal, residual stress will be generated near the joint, which will reduce the mechanical properties of the joint;
[0006] ④ There are welding defects in the joints. Due to the active chemical properties of magnesium alloys, welding defects such as pores and slag inclusions will inevitably appear during the welding proces...

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  • Biaxial bending deformation device and processing method for processing welded joint
  • Biaxial bending deformation device and processing method for processing welded joint
  • Biaxial bending deformation device and processing method for processing welded joint

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Embodiment

[0041] The invention is especially suitable for welded joints with low mechanical properties, such as magnesium alloy welded joints and aluminum alloy welded joints. In order to illustrate the treatment effect of the welded joints of the present invention, the author chooses the Mg-Al series AZ31 magnesium alloy plate provided by Shandong Yinguang Magnesium Industry Co., Ltd. as the base material for the test.

[0042] 1) Selection of raw materials

[0043]The size of the test plate is 2000mm×600mm×2mm, and the welding material is AZ31 magnesium alloy welding wire with the same quality as the base metal provided by the company, and the specification is φ3.0mm. The main chemical composition and mechanical properties of the magnesium alloy base metal are shown in Table 1 and Table 2:

[0044] Table 1 Chemical composition of AZ31 magnesium alloy (wt.%)

[0045]

[0046] Table 2 Mechanical properties of AZ31 magnesium alloy

[0047]

[0048] 2) Welding method and equipmen...

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Abstract

The invention provides a biaxial bending deformation device and a processing method for processing a welded joint. The biaxial bending deformation device comprises a heating heat preservation device, a plate feeding roller group, a plurality of pairs of curved roller groups, a plurality of pairs of rolling roller groups and a passage penetrating through all heat preservation layers, plate feeding roller group, curved roller groups and rolling roller groups, wherein the passage is divided into a horizontal section and a curved section, the heating heat preservation device, the plate feeding roller group and the rolling roller groups are arranged on the horizontal section, the curved roller groups are arranged on the curved section, the curved section comprises a plurality of concave curved surfaces and convex curved surfaces, which are alternately arranged, the curved roller groups include an upper curved roller group and a lower curved roller group, the upper curved roller group is arranged on the convex curved surface, and the lower curved roller group is arranged on the concave curved surface. By adopting the biaxial bending deformation device, a weld seam of the welded joint can be extended to certain extent, so that the residual stress can be reduced, and crystalline grains can be refined; and the biaxial bending deformation device is particularly suitable for the welded joint with relatively low mechanical performance.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to a bidirectional bending deformation device for processing welded joints and a processing method thereof. Background technique [0002] Welding is a key processing technology for the manufacture of soft alloy products, especially magnesium alloy products, but the welding performance of magnesium alloy is not good, and it is difficult to achieve reliable connection. For this reason, magnesium alloy structural parts and the connection between magnesium alloy and other material structural parts have become a technical bottleneck restricting the application of magnesium alloys and one of the key technologies to be solved urgently. The reliability of magnesium alloy welded joints has become an urgent problem in its application. At present, magnesium alloys are being used in the manufacture of many load-bearing structural parts, such as magnesium alloy steering wheel skelet...

Claims

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Application Information

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IPC IPC(8): C22F1/06C21D9/50
Inventor 初雅杰韩昕宸杨宗辉成家林
Owner 无锡市通瑞电力自动化设备有限公司
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