Large-size variable-diameter robot clamp used for processing tubular pile end plates

The invention provides a large-size variable-diameter robot clamp used for processing tubular pile end plates. The clamp mainly comprises a base, a linear position-changing mechanism, a clamping mechanism, a positioning mechanism and a dustproof mechanism. The linear position-changing mechanism is driven by a servo motor so that the automation degree of working of the clamp can be improved, and meanwhile, a ball screw and a linear slide rail are integrated so that high-precision large-size position changing of the clamp can be achieved. An electric permanent magnet mode is adopted by the clamping mechanism so that the tubular pile end plates can be clamped rapidly, efficiently, stably and reliably. The positioning mechanism guarantees precise actions and operation safety of the clamp through limit switches. The dustproof mechanism is provided with telescopic protecting sleeves so that a good working environment in the clamp can be ensured. The large-size variable-diameter robot clamp can meet the requirement for efficiently and reliably clamping the tubular pile end plates of various size specifications in robot automatic processing.