High-strength bolt fastening system

Abstract

A robot is used to efficiently tighten nuts onto torque-shear type high-strength bolts. [Solution] The high-strength bolt fastening system using a robot mounted on a mobile trolley comprises a shear wrench having a socket for rotating a nut, a holding part for holding the shear wrench, a restricting part for restricting the rotation of the socket, and a detection part for detecting the positional relationship between the socket and the nut. The system's controller rotates the entire shear wrench via the holding part while restricting the rotation of the socket with the restricting part, and aligns the socket and nut until their meshing parts align. This automatically corrects any misalignment between the nut and the socket, enabling efficient tightening work using the robot.

Claims

1. A high-strength bolt fastening system using a robot mounted on a mobile trolley, A shear wrench having a socket, which rotates a nut fitted onto a high-strength bolt by engaging it with a meshing portion on the inner surface of the socket, A restricting unit that restricts the rotation of the aforementioned socket, The holding part for holding the shear wrench, A robot having, A detection unit for detecting the positional relationship between the socket and the nut, Controller and It has, The controller controls the restricting unit based on the detection result of the detection unit to restrict the rotation of the outer surface of the socket, and then controls the robot to rotate the holding unit until the engagement portion of the shear wrench with the socket engages with the nut, thereby rotating the shear wrench. High-strength bolt fastening system.

2. The controller, after the socket is fitted onto the nut, controls the restricting part to release the socket and controls the shear wrench to rotate the nut. The high-strength bolt fastening system according to claim 1.

3. The shear wrench has an inner socket that fits onto the pin tail of a high-strength bolt, The controller controls the restricting unit to fix the socket, and then controls the robot to rotate the holding unit, thereby rotating the shear wrench around the central axis of the inner socket and moving the shear wrench toward the pin tail to fit the pin tail into the inner socket. The high-strength bolt fastening system according to claim 1.

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