发布时间 : 星期二 文章多功能棒料折弯机液压系统设计毕业设计更新完毕开始阅读
Multifunction bar bending machine
hydraulic system design
Abstract
Rod bending, especially off the bar once more bent is a low efficiency, high energy consumption, high noise and processing costs work properly designed bending machine hydraulic system to improve work efficiency, reduce noise and optimize the work environment , reduce production costs and improve security are of great significance. This topic has designed a versatile rod bending machine hydraulic system, which uses a typical dual pump + triplex structure, dual pump to bend around a separate oil tank meets the system requirements for working anti-jamming capability; a one-way throttle throttle way back to the oil not only reduces manufacturing costs but also to achieve the smooth operation of the hydraulic system; multi-feed while bending rods and a plurality of rods fold once more bent not only reduces the cost of production greatly improving production efficiency. This topic relates to a multi-function bar bending machine hydraulic system schematic formulation, analysis and calculation of the hydraulic system, manifold designs and builds hydraulic station, available as a multifunction bar bending machine hydraulic system design and troubleshooting reference data.
Keywords: bar bending machine interference hydraulic system
目录
1.引言 ................................................................ 1 2.液压系统的设计计算 .................................................. 2
2.1原始参数分析 ................................................... 2
2.1.1原始参数和动作循环 ....................................... 2 2.1.2运动和动力分析 ........................................... 2 2.2工况分析 ....................................................... 2
2.2.1计算压紧缸各阶段的外负载 ................................. 3 2.2.2计算左折弯液压缸各阶段的外负载 ........................... 3 2.2.3计算左折弯缸各阶段的外负载 ............................... 5 2.3拟定液压系统原理图 ............................................. 7
2.3.1确定供油方式 ............................................. 7 2.3.2调速方式的选择 ........................................... 7 2.3.3调速换接方式的选择 ....................................... 8 2.3.4夹紧回路的选择 ........................................... 8 2.3.5绘制液压系统原理图 ....................................... 8 2.4液压系统计算和选择液压元件 ..................................... 9
2.4.1液压缸主要尺寸的确定 ..................................... 9 2.4.2确定液压泵的流量、压力和选择泵的规格 .................... 11 2.4.3与液压泵匹配的电动机的选定 .............................. 12 2.4.4液压阀的选择 ............................................ 13 2.4.5确定管道尺寸 ............................................ 14 2.4.6液压油箱容积的确定 ...................................... 14 2.4.7液压油的选择 ............................................ 14 2.5液压系统的验算 ................................................ 14
2.5.1压紧缸压力损失的验算 .................................... 14 2.5.2右折弯液压缸压力损失的验算 .............................. 17 2.5.3左折弯液压缸压力损失的验算 .............................. 20 2.5.4系统温升的验算 .......................................... 22
3液压油箱的计算 ..................................................... 24
3.1液压油箱的作用概述 ............................................ 24 3.2液压油箱有效容积的确定 ........................................ 25 3.3液压油箱外形尺寸的确定 ........................................ 26 3.4液压油箱的结构设计 ............................................ 26
3.4.1箱体设计 ................................................ 26 3.4.2隔板设计 ................................................ 26 3.4.3油箱支脚设计 ............................................ 27 3.4.4箱盖的设计 .................................................. 27 3.5油箱辅件的设计 ................................................ 28
3.5.1液位计的选择 ............................................ 28 3.5.2过滤器的选择 ............................................ 29 3.5.3减少噪音降低震动的措施 .................................. 29 3.5.4液压油箱及其辅件的规格 .................................. 30
4.液压集成块和叠加阀的结构设计 ....................................... 30
4.1液压集成块个数的确定 .......................................... 30 4.2确定油道的通径 ................................................ 30 4.3叠加阀装置设计 ................................................ 31 4.4集成块上液压元件的布置 ........................................ 32 5液压站的结构设计 ................................................... 32
5.1液压泵的安装方式 .............................................. 32 5.2电动机和液压泵的联接方式 ...................................... 34 5.3集成块的布置 .................................................. 34 5.4绘制装配图 .................................................... 34 6结论 ............................................................... 36 谢辞 ................................................................. 37 参考文献 ............................................................. 38
1引言
金属棒料广泛应用于建筑、桥梁、石油、化工、车辆、船舶和各种机械制造业中，因此市场对棒料折弯机的需求量非常大[1]。折弯机分为手动式，液压式和数控式，液压折弯机以其高压、高速、大功率、低噪声以及液压元件经久耐用、高度集成化等一系列优点而成为目前国内的主流产品。但传统的折弯机功能单一，效率低下，不能实现自动控制，而现代企业正逐步朝高效、环保、自动化、标准化等方向发展，显然传统的折弯机已越来越不能满足现代企业的生产要求。而多功能棒料折弯机借助限位开关，可实现多个弯曲段棒料的一次挤压成型；其右折弯机构设置在可以沿横向导轨滑动的架体上，松开锁紧螺母，摇动丝杠可以调整右折弯机构的折弯位置，以满足不同规格产品的要求[2]；其液压系统元件采用电磁阀，液压缸行程上布有行程开关，液压缸行进，压下行程开关，行程开关通过逻辑电路发信号给电磁阀上的电磁阀线圈，电磁铁得电实现液压回路换向，从而实现工作循环的自动控制。将这种能够实现自动控制的多功能棒料折弯机应用于日常生产，对提高生产效率，降低制造成本，简化操作，减少能耗，降低劳动强度，改善工作环境都有重大意义。