Design and Parameter Optimization Analysis of the Tong Dies of the Clamping tong for the Iron Roughneck

The clamping tong is a key component of the iron roughneck. During the work process, the tong dies of the clamping tong contact with the drilling tool directly and bear a significant force. The quality of the tong dies has a significant impact on both the operational efficiency of the iron roughneck and the service life of the tubular components it engages with. This paper, based on the actual working conditions of the tong dies, designs the clamping tong for iron roughneck, and focus on tooth profile analysis and parameter optimization of the tong dies. The contact between the tong dies and the drill string is studied, and the equivalent friction coefficient as well as the necessary conditions to prevent slippage are calculated. Additionally, the biting depth and biting conditions of the tong dies are computed. Finally, using the orthogonal experimental method, the correlation between four factors and the equivalent friction coefficient is established, and the optimal value range for these factors is determined. The paper concludes with a simulation-based analysis to identify the optimal parameters for the tong dies.