A Constant Inclination Angle Control Method for Curve Friction Stir Welding
A technology of friction stir welding and inclination control, applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve problems such as welding curve inclination angle change, raw material size tolerance, material thermal deformation, etc., achieve low cost, improve welding quality, Effects that apply to a wide range of materials
Active Publication Date: 2020-01-07
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the inclination angle of the actual welding curve changes due to the thermal deformation of the material, the size tolerance of the raw material and other factors in the friction stir welding of the existing curved surface curve weld seam, to provide a laser ranging sensor based Curve friction stir welding method with constant inclination angle control
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Embodiment 1
[0024] Install three or more distance measuring sensors at the same height on the main shaft;
[0025] Measure the relative height between the ranging sensor and the workpiece during welding, calculate the difference between the height of each sensor relative to the workpiece, and convert the difference into the current inclination value of the spindle;
[0026] The current inclination angle is used as the input quantity of the controller, and the attitude of the main shaft is closed-loop feedback controlled with the constant inclination angle as the control target.
[0027] figure 1 An installation structure for this welding control method. figure 2 Shown is a simplified relationship diagram of the relative position of the sensor and the workpiece during constant inclination welding, showing the installation position relationship of each sensor relative to the welding workpiece. further, image 3 Shown is a schematic diagram of the relative positions of the three laser ra...
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The invention discloses a constant-dip-angle control method of curve friction stir welding. The method comprises the following steps: three or more distance measuring sensors are mounted on a main shaft by the same height; relative heights of the distance measuring sensors and workpieces are measured during welding; difference values of all the sensors relative to the heights of the workpieces arecalculated, and are converted to a present dip angle value of the main shaft; the present dip angle value is used as an input quantity of a controller; and with a constant dip angle as control target, the closed-loop feedback control is performed on gestures of the main shaft. The constant dip angle of the main shaft can be controlled in the curve surface-curve line welding line welding to improve the welding quality; and the method is suitable for solid-phase connection of such nonferrous metal as aluminum, magnesium and copper alloys and the connecting process of dissimilar metal.
Description
technical field [0001] The invention belongs to the field of welding, and in particular relates to a constant inclination angle control curve friction stir welding method based on laser ranging sensing. Background technique [0002] Friction stir welding has the advantages of small welding deformation, less welding defects, good mechanical properties, and high quality. As a new solid-phase joining technology, it has been widely used in the aerospace field. This method is easy to guarantee the quality when welding straight welds and plane curve welds, and has achieved mature applications. However, it is difficult to weld curved surface welds, and welding defects are prone to occur. Especially when welding the surface welds of curved surface parts, due to factors such as thermal deformation of materials and dimensional tolerances of raw materials, the actual welding curve inclination changes, resulting in poor welding formation. In practical applications, the demand for curv...
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IPC IPC(8): B23K20/12
CPCB23K20/123
Inventor 赵慧慧尹玉环胡蓝夏佩云马子奇封小松宋学成董吉义郭立杰
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY