Method for eliminating welding residual stress

• Main Authors: CHEN MAOJIN, ZHANG HONGWEI, XUE LIUTAO, JI SIQI
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2017
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a method for eliminating welding residual stress. The method comprises the steps that an X-ray diffraction (XRD) test is conducted on a welding part for surface welding residual stress testing, and welding residual stress surface layer data is obtained; a welding simulation model of the welding part is established, simulation data of the welding residual stress is calculated, and then the distribution law of the welding residual stress of the welding part is finally obtained; numerical simulation calculation of the vibration impact process is conducted by simulating the impact frequency and the impact amplitude on the basis of the distribution law of the welding residual stress, and then vibration impact parameters for eliminating the welding residual stress are obtained; the welding part is clamped in a drivable positioning workbench, the positions of an impact head and a welding part welding joint on the positioning workbench are adjusted, and impact treatment is conducted in the mod