论文总字数：15301字

摘 要

目前汽车变速箱两端面组合铣削床液压系统在工作效率、系统功率损失、工作稳定性与节能环保方面存在一定的问题，这些问题有待于进一步的优化，需要对整个系统进行改良或重新的设计。综上所述，探究组合铣削床液压系统的改进与设计，有着重要的现实意义，对我国现代化建设以及制造业的发展起着巨大的推动作用。通过设计任务书给出的设计要求，根据组合铣削床的工作特点，结合查阅与组合机床相关文献资料，从而获得与设计主题相关的数据，并且以一些典型设计案例为对象，系统地收集数据和资料，进行深入地研究，了解该组合铣削机床各阶段的工作特点与工作负载后，对其进行了液压系统的设计，并对此系统进行了性能验算与液压元件的选择。同时还根据液压系统设计后得出的主要参数，对主要的工作进给缸进行了结构设计与强度校核，并作了完整的液压缸装配图与零件图。

关键词:组合铣削床；组合机床；液压系统；液压缸

Design of hydraulic system and cylinder of two end face combined milling machine for automobile gearbox

Abstract

At present, there are some problems in the working efficiency, power loss, stability, energy conservation and environmental protection of the hydraulic system of the two end face combined milling machine for automobile gearbox. These problems need to be further optimized, and the whole system needs to be improved or redesigned. To sum up, it is of great practical significance to explore the improvement and design of the hydraulic system of combined milling machine, which plays a huge role in promoting the development of China"s modernization and manufacturing industry. Through the design requirements given in the design specification, according to the working characteristics of the combined milling machine, combined with consulting the literature related to the combined milling machine, the data related to the design theme can be obtained. Taking some typical design cases as the object, the data and information are systematically collected and deeply studied to understand the working characteristics and workload of the combined milling machine at various stages, The hydraulic system is designed, and the performance of the system is checked and the hydraulic components are selected. At the same time, according to the main parameters obtained after the design of the hydraulic system, the structure design and strength check of the main working feed cylinder are carried out, and the complete assembly drawing and part drawing of the hydraulic cylinder are made.

Key words: combined milling machine; Modular machine tool; Hydraulic system; Hydraulic cylinder

目录

摘要 ........................................................................ I

Abstract ................................................................... II

第一章 引言 ................................................................ 1

1.1 课题的来源 ............................................................ 1

1.2 课题的研究意义 ........................................................ 1

1.3 国内外研究现状 ........................................................ 1

第二章 汽车变速箱两端面组合铣削床液压系统设计 ............................... 3

2.1 确定液压系统的工作要求 ................................................ 3

2.2 工况分析 .............................................................. 3

2.3 拟定液压系统原理图 .................................................... 6

2.4 液压系统的计算和液压元件的选择 ........................................ 7

第三章 液压系统性能验算 .................................................... 11

3.1 验算系统压力损失 ..................................................... 11

3.2 液压泵的工作压力估算 ................................................. 12

3.3 估算系统效率、发热和升温 ............................................. 12

第四章 液压缸设计 .......................................................... 14

4.1 结构初型 ............................................................. 14

4.2 局部结构初选 ......................................................... 14

4.3 材料选择 ............................................................. 14

4.4 排气装置 ............................................................. 14

4.5 密封件的选用 ......................................................... 14

4.6 进给缸油口尺寸 ....................................................... 15

4.7 工作负载 ............................................................. 15

4.8 缸筒内径和活塞杆直径 ................................................. 15

4.9 最小导向长度 ......................................................... 15

4.10 缸筒壁厚和外径计算 .................................................. 16

4.11 活塞杆强度和液压缸稳定性计算 ....................................... 16

4.12 缸盖连接螺栓的强度计算 .............................................. 17

第五章 总结与展望........................................................... 18

致谢 ....................................................................... 19

参考文献 ................................................................... 20

第一章 引言

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