8MN板框式模锻液压机本体设计

本科毕业设计（论文）

8MN板框式模锻液压机本体设计

燕山大学

本科毕业设计（论文）

8MN板框式模锻液压机本体设计

学院（系）：机械工程学院____________

年级专业：__________ 2010级_____________

学生姓名：_______________________________

指导教师：_______________________________

答辩日期：2014 年月日 ________________

燕山大学毕业设计（论文）任务书

学院：机械工程学院系级教学单位：塑性成形系

摘要大型模锻件制造水平的高低与航空航天、核电、船舶、军工等行业的发展存在着直接的联系并产生深远的影响。为了满足对大型锻件日益增长的需求，用于其生产的主要设备—大型模锻液压机的研究、开发就显得更加迫切。模锻液压机本体结构多种多样，其中，板框组合式结构可以很好的解决大型压机高承载引起的一系列问题，所以国内外大型模锻液压机广泛采用此结构。目前大型板框式模锻液压机板框结构形式主要有三类：①框架由多层横板和竖板联成②框架由多层整片“ O'形钢板相互叠加通过预紧而成③框架由多层带钩头的钢板组合成。液压机框架由多层带“ C”形钩头钢板组合成可以节省材料，降低成本，而且还能够解决加工、制造、安装、运输等问题，减少应力集中现象出现，提高了机架的强度，明显优于其它结构。

在设计过程中，根据液压机的主要技术参数算出主工作缸、穿孔缸、回程缸、平衡缸、上梁板、下横梁、活动横梁、“ C”形板、大拉杆、上下夹紧梁和上十字键等的主要尺寸。液压缸作为液压机的关键部件，必须拥有足够的强度或刚度，所以必须通过校核计算，确定液压缸最终尺寸，并且利用UG 软件，建立了横梁、夹紧梁，上十字键和整体框架等零部件的实体模型，以Marc有限元软件作为分析工具，对主要受力零部件进行了三维有限元计算，对其结构的合理性和应力集中情况进行了分析，最终完成设计。

关键词：模锻，液压机，本体，板框式，建模，有限元，分析

Abstract

The level of large forging manufacturing there is a direct link with aerospace, nuclear power, shipbuilding, war industry and other industries development and have a profound impact. In order to meet the increasing demand for large forgings, used for the production of large forging hydraulic press which is the main equipment research, development, becomes more urgent. Die forging hydraulic press frame structure is varied, among them, plate and frame composite structure can solve a series of problems caused by the large press high bearing well, so the domestic and foreign large forging hydraulic press widespread adoption of the structure. So far, the plate and frame structure of a large plate and frame type die forging hydraulic press mainly has three categories:

(1) framework by multi-layer rung and got behind vertical plate (2) framework by multilayer entire "O" shape steel overlay each other by preloaded into (3) framework by multilayer belt hook plate combined into. Hydraulic press frame by "C" shaped hook and multi-layer steel plate combination can save materials, reduce cost, but also can solve the problem of processing, manufacture, installation, transportation and so on, to reduce stress concentration phenomenon, improve the strength of the chassis, is superior to other structures.

In the design process, according to the main technical parameters to calculate the primary work cylinder of hydraulic press, punch, the return cylinder and balance cylinder, the beams, activity "C" shape plate, bar, upper and lower clamping beam and the main dimensions of the cross key, etc. Hydraulic cylinder as the key components of hydraulic press, must have sufficient strength and rigidity, so must pass the check calculation, determine the hydraulic cylinder size, and by using UG software, set up the beam, the clamping beam, cross key parts such as entity model and the overall framework, with finite element software Marc as analysis tool, the main stress components of the three-dimensional finite element calculation, the structure of rationality and stress concentration was analyzed, and the final design.

Keywords: die forging hydraulic press, ontology, plate and frame type, modeling, finite element，analysis