Calibration method of pressure measuring device for five-axis friction stir welding with large curved surface

Abstract

The invention provides a large curved surface five-axis friction stir welding pressure measurement device and a calibration method. The large curved surface five-axis friction stir welding pressure measurement device comprises a measurement device body and a welding spindle, wherein the measurement device body is integrated on the welding spindle and comprises a sliding block, a guide rail and multiple pressure sensors, the pressure sensors are evenly installed on a spindle core along the circumferential direction of the welding spindle, and pressure heads of the pressure sensors are pressed on a spindle housing of the welding spindle; the sliding block is installed on the spindle housing; and the guide rail is installed on the spindle core. According to the large curved surface five-axisfriction stir welding pressure measurement device and the calibration method, real-time adjustment of welding pressure is realized through the pressure measurement device body integrated on the spindle, and the measurement and control precision of large curved surface five-axis friction stir welding pressure is improved.

Description

technical field [0001] The invention relates to the field of welding engineering, in particular to a five-axis friction stir welding welding pressure measuring device and a calibration method for a large ellipsoidal workpiece. Background technique [0002] Friction Stir Welding (Friction Stir Welding referred to as FSW) is an invention patent proposed by the British Welding Institute (TWI) in October 1991. The friction stir welding process was initially mainly used to solve the welding of low-melting point materials such as aluminum alloys. TWI has conducted more research on the characteristics and applications of the friction stir welding process. [0003] Friction stir welding technology is a solid phase welding technology, which has the advantages of low heat input, high efficiency, energy saving, and high reliability. It is widely used in the aerospace field. Problems such as the uneven surface of the workpiece cause the stirring head to press into the workpiece too dee...

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Problems solved by technology

[0003] Friction stir welding technology is a solid phase welding technology, which has the advantages of low heat input, high efficiency, energy saving, and high reliability. It is widely used in the aerospace field. Problems such as the uneven surface of the workpiece cause the stirring head to press into the workpiece too deep or too shallow, which directly affects the welding quality of the weld. Therefore, it is necessary to control and adjust the stirring needle in real time during the welding process so that it can always maintain a suitable pressing amount. , so as to ensure the welding quality

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