A Method of Controlling the Root Gap and Warpage of Welding Joints on One Side of Thin Plate

A technology of root gap and joint root, which is applied in the field of single-face welding of thin plates, can solve the problems affecting the quality of the weld seam and the welding process, warping deformation, poor flexibility, etc., and achieves a significant effect of misalignment control, free separation, and positioning The effect of flexible and accurate spacing

A technology of root gap and joint root, which is applied in the field of single-face welding of thin plates, can solve the problems affecting the quality of the weld seam and the welding process, warping deformation, poor flexibility, etc., and achieves a significant effect of misalignment control, free separation, and positioning The effect of flexible and accurate spacing

CN103722272BInactive Publication Date: 2015-10-07GUANGDONG PROVINCIAL INST OF WELDING TECH GUANGDONG PROVINCIAL ACADEMY OF UKRAINE
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  • A Method of Controlling the Root Gap and Warpage of Welding Joints on One Side of Thin Plate
  • A Method of Controlling the Root Gap and Warpage of Welding Joints on One Side of Thin Plate
  • A Method of Controlling the Root Gap and Warpage of Welding Joints on One Side of Thin Plate

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Experimental program
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Effect test

Embodiment 1

[0055] The method of dynamically controlling the root gap and warping deformation of the single-face welding joint of the thin plate with welding includes: the thickness of the aluminum alloy thin plate is δ=3mm, according to the δ≤4mm in Table 1, the I-shaped groove welding is adopted, see Figure 9 , the root gap is 1.5mm;

[0056] Make a circular convex roller 2 that controls the root gap with welding positioning. The section of the circular convex part 21 is an I-shaped structure, the convex height is 4mm (including the circular top), and the 1mm exceeding the plate thickness In the forming groove 51 of the backing plate 5 under the thin plate;

[0057] Assemble the circular convex roller 2, TIG welding torch (with filler wire), and extrusion wheel 3 in sequence, and place the device on the aluminum alloy sheet to be welded. Automated TIG wire-filled welding, due to the circular forming groove below, successfully completes the TIG welding of single-sided welding and doubl...

Embodiment 2

[0059] The method of dynamically controlling the root gap and warping deformation of the single-face welding joint of the thin plate with welding includes: the thickness of the aluminum alloy thin plate is δ=5mm, according to the δ>4mm in Table 1, the V-shaped groove welding is adopted, see Figure 11 , the groove angle is 65°, the blunt edge height at the root is 2mm, and the groove gap is 2.5mm;

[0060] Make a circular convex roller 2 that controls the root gap with welding positioning, the section of the circular convex part 21 of the circular convex roller 2 is an inverted Y-shaped structure, and the total height of the convex is 6.5mm (including the circular top) , the 1.5mm exceeding the plate thickness δ is located in the forming groove 51 of the backing plate 5 under the aluminum alloy sheet;

[0061] Assemble the circular convex roller 2, TIG welding torch (with filler wire), extrusion wheel 3, and extrusion force device 7 in sequence, place the device on the aluminu...

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Abstract

The invention discloses a method for controlling root gaps and buckling deformation of single-side butt-welded joints of sheets. The method includes steps of firstly, mounting a circular convex roller at the front of a welding gun according to the thickness of a sheet, groove types and the sizes, which are required by a process, of root gaps; secondly, mounting a squeezing wheel with a groove at the rear of the welding gun according to the sizes, which are required by a height strengthening process, of welded joints; thirdly, connecting the circular convex roller with the squeezing wheel by a support and mounting a squeezing force device on the support. The method has the advantages that dynamic welding dynamic positioning and constraining effects can be realized, the positioning distance is accurate, buckling deformation of the flat sheets can be flexibly controlled, an obvious flat sheet buckling deformation control effect can be realized, point fixing and removing operation on point contact, surface contact, positioning plug blocks and the like can be omitted, automatic welding procedures can be assuredly smoothly carried out, the method is free of extract constraints on the distances of the positioning plug blocks and various sections, seams can be freely expanded and contracted in the surfaces of the sheets in heating and cooling procedures, residual stress due to the extra constraints on the distances of the positioning plug blocks or various sections can be removed, and deformation due to the extra constraints on the distances of the positioning plug blocks or various sections can be prevented.

Description

technical field [0001] The invention relates to a thin plate single-face welding process method, in particular to a method for dynamically controlling the root gap and warping deformation of a single-face welded joint of a thin plate along with welding. Background technique [0002] Aluminum and titanium alloys have the advantages of high specific strength, high specific stiffness, light weight, and corrosion resistance, and are widely used in aerospace, marine weaponry and other fields. At the same time, due to its special physical and chemical properties, such as low density, small specific heat, and large thermal expansion coefficient, large internal stress will be generated in the weld seam and near seam area in flat tailor welding, of which the transverse internal stress and transverse shrinkage , will cause the root spacing of the welded plate to decrease continuously, and eventually the spacing will disappear. This will lead to uneven filling of the weld metal and le...

Claims

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Application Information

Patent Timeline
07 Oct 2015
Publication
CN103722272B
IPC
B23K9/02; B23K37/04
CPC
B23K9/0035; B23K9/025; B23K9/035; B23K9/32; B23K31/003; B23K2101/185
Inventors
闫德俊; 陈和兴