Method and device for effectively reducing or eliminating residual stress of friction stir welding plate
A friction stir and residual stress technology, used in welding equipment, process efficiency improvement, non-electric welding equipment, etc., can solve problems such as residual stress of welded plates, and achieve the effect of improving performance, high-quality friction stir welding, and reducing production costs.
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[0026] Example one.
[0027] Such as figure 1 Shown.
[0028] A method that can effectively reduce / eliminate the residual stress of the friction stir welding plate. The key is to set several heat source points on the friction stir welding backing plate and the welding seam relative to the welding seam and on both sides to form an array arrangement, each heat source Point uses high-frequency induction coil heating to generate heat, so that the heat source generated by the heat source point matches the heat generated by the friction stir welding process. Its array-type point heat source can generate different residual stresses for different materials due to different material properties and then perform temperature Control and maintain a certain amount of heat until the end of the entire welding process, reduce the temperature gradient between the welding area of the stirring head and the welded area. After the welding is completed, control the heat generation of the heat source to...
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[0034] Example 2.
[0035] Such as figure 1 Shown.
[0036] A kind of material used in friction stir welding that can effectively reduce / eliminate the residual stress of the friction stir welding plate. It includes a steel backing plate 1 (it can also be a titanium alloy plate, a tungsten alloy plate, a molybdenum alloy plate and other metal dissimilar material plates) ,Such as figure 1 As shown, the size of the backing plate 1 is 800mm×400mm×30mm. On the backing plate 1, 12 circular areas along the center line of the length direction and on both sides are selected as the heat source point 2. The diameter of the circular area is 10mm, and the heat source point in the middle 2 Located at the geometric center of the backing plate surface, 12 heat source points 2 are arranged in an array, and the distance between the two heat source points 2 is 100mm (also can choose between 5mm-500mm); the heat of heat source point 2 comes from high frequency The induction coil heats the cylindrical...
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