摘    要

本文旨在设计一种金属剪断机的液压系统，以满足特定的工作任务及要求。该系统需完成供给-压块下降-剪力下降-剪刀返回-压块下降的完整工作过程，并具备处理最大压力120,000N、最大开口200mm、刀片长度400mm的金属材料切割能力，切割时间控制在8-12次/分钟。通过对剪断机工作原理的分析，本文提出了液压传动方案，并详细阐述了其系统原理及操作流程。然而，考虑到液压系统存在的泄露、油温变化影响、高制造成本及维修不便等局限性，本文最终未采用此方案。尽管如此，本文的研究为金属剪断机液压系统的设计提供了理论参考，并为后续的优化设计奠定了基础。

关键词：金属剪断机；液压系统；液压传动；设计原理；切割能力；局限性

ABSTRACT

This paper aims to design a hydraulic system of the metal shear machine to meet the specific work tasks and requirements. The system needs to complete the complete working process of supply-block drop-shear drop-scissors return-block drop, and has the cutting ability of metal material with maximum pressure 120,000N, maximum opening 200mm, blade length 400mm, and the cutting time is controlled at 8-12 times / minute. Through the working principle of the machine, this paper proposes the hydraulic transmission scheme and elaborated the system principle and operation process. However, considering the limitations of hydraulic system leakage, oil temperature changes, high manufacturing cost and inconvenient maintenance, this scheme is not adopted in this paper. Nevertheless, the research in this paper provides a theoretical reference for the design of the hydraulic system of the metal shear machine, and lays the foundation for the subsequent optimization design.

Key words: metal shear machine; hydraulic system; hydraulic transmission; design principle; cutting ability; limitations