Point contact testing device for testing residual stress of blade

• Main Authors: MENG FANGANG, ZHAO JUNMING, JIANG DONGPO, GUO XUXIAO, LI YAN, WANG HUI, YU NING, FENG YONGZHI, DING JIWEI
• Format: Patent
• Language: Chinese; English
• Published: 03.04.2020
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

The utility model discloses a point contact testing device for testing residual stress of a blade, belongs to the technical field of residual stress testing of surfaces of blades of steam turbines andgas turbines, and solves the problem of testing and adjusting level of residual stress of non-planar characteristic specified testing points of complex components. The device comprises a six-degree-of-freedom objective table, a point contact gradienter and a laser probe, a to-be-measured blade is installed on the six-degree-of-freedom objective table, and the laser probe is arranged above the to-be-measured blade. The point contact gradienter comprises a conical bracket, a cross dial and a magnetic column; an axial mounting groove is machined in the small-diameter end of the conical bracket,the magnetic column is arranged in the axial mounting groove, the bottom of the magnetic column extends out of the axial mounting groove, the point contact gradienter is attracted to a designated measuring point of a to-be-mea