摘要

本文围绕液压折弯机液压控制系统的设计展开研究，主要针对金属板料的折弯加工需求，设计了一套高效、精确的液压控制系统。系统最大工作压力设定为22MPa，要求执行元件具备快速上行（44mm/s）、快速下行（40mm/s）及慢速下行工作（8mm/s）的速度特性，同时设定了快速下行程为260mm、慢速下行工作行程100mm以及往复加减速时间为0.2s的具体参数。通过对国内外液压折弯机液压控制系统设计发展的最新情况进行调研，本文融合了先进的电液混合控制技术，以提升系统的控制精度和能量利用效率。在方案拟定阶段，提出了三种不同的液压系统及微机控制系统设计方案，并进行了比较分析，最终确定了最优方案。设计过程中，进行了详细的计算与元件选取，确保系统满足设计要求。此外，本文还利用计算机绘制了液压系统原理图及结构装配图，完成了液压系统的结构设计。本研究不仅为液压折弯机的控制系统设计提供了理论依据，也为相关领域的液压系统设计提供了参考。

关键词：液压折弯机；液压控制系统；工况分析；原理图设计；系统验算

Abstract

This paper focuses on the design of hydraulic control system of hydraulic bending machine, and designs a set of efficient and accurate hydraulic control system mainly for the bending processing requirements of metal plate material. The maximum working pressure of the system is set at 22MPa, which requires the actuator to have the speed characteristics of fast uplink (44 mm/s), fast downstream (40 mm/s) and slow downlink (8 mm/s), and sets the specific parameters of fast downstroke of 260mm, slow downstroke of 100mm and reciprocating deceleration time of 0.2s. By investigating the latest situation of the development of hydraulic bending machine at home and abroad, this paper integrates advanced o-hydraulic hybrid control technology to improve the control precision and energy utilization efficiency of the system. In the scheme formulation stage, three different hydraulic system and microcomputer control system design schemes are proposed, and comparative analysis was conducted to determine the optimal scheme. During the design process, a detailed calculation and element selection are made to ensure that the system meets the design requirements. In addition, this paper also uses the computer to draw the hydraulic system schematic diagram and structural assembly diagram, completed the structural design of the hydraulic system. This study not only provides a theoretical basis for the control system design of the hydraulic bending machine, but also provides a reference for the hydraulic system design in the related fields.

Key words: hydraulic bending machine; hydraulic control system; working condition analysis; schematic design; system checking

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