目的 根据纸护角生产线的生产要求， 设计一种满足纸护角连续送料时定长剪切的飞剪式定长剪切机构。 方法 运用旋转式飞剪原理， 采用伺服系统的闭环控制， 使飞剪式定长剪切机构能实现在定长剪切过程中对纸护角跟踪的“速度-位置双同步”。 结果 飞剪式定长剪切机构省去了传统机构在送料过程中剪切所需的停顿时间， 大幅度提高了生产效率。 同时， 可以对不同厚度、不同长度以及不同送料速度的物料进行定长剪切。 结论 飞剪式定长剪切机构结构简单、使用方便、成本低廉， 可广泛用于多种产品的定长剪切。

Objective According to the production requirements of paper corner production line, this paper focused on designing of a flying shear type paper corner fixed-length cutting machine system with continuous feeding. Methods The principle of rotating flying shears was used, and a closed-loop servo control system was adopted to achieve "speed Position Dual Sync" in fixed-length shearing process of tracing paper corner. Results This flying shear type cutting machine could eliminate the pause time in the traditional fixed-length cutting process and greatly improve the production efficiency. Meanwhile, fixed-length cutting could be realized for materials with different thickness, different length and different material feeding speed. Conclusion Flying shear type paper corner fixed-length cutting machine has simple structure, convenient operation and low production cost, and is widely applicable for fixed-length cutting of a variety of products.