WC67K NC hydraulic press brake machine with E21 has integrated hydraulic control system, which is compact and reduces piping connections, increasing system reliability and ease of maintenance. The machine is synchronised with twisted axes and has two synchronised pendulum arms at both ends of the ram, so that the movement of the ram is always parallel to the working table and has a high resistance to deflection during operation. The lower limit stroke of the cylinder is positioned by a mechanical gear block, so that the continuous working bending angle does not drift. The backstop and ram stroke can be manually fine-tuned and the E21 system has a digital display. The slider adopts the upper drive, the speed adjustment range is large, the work is stable and reliable. Equipped with compensation function, high bending accuracy.