J31-250型曲柄压力机设计毕业设计说明书.doc

建筑大学
毕业设计说明书
毕业设计题目: J31-250型曲柄压力机设计
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摘要
锻压机械在工业中占有极其重要的地位,广泛应用于几乎所有的工业部门,如机械、电子、国防等。然而,在锻压机械中,又以曲柄压力机最多,占一半以上。
曲柄压力机是以曲柄滑块机构作为运动机构,依靠机械传动将电动机的运动和能量传给工作机构,通过滑块给模具施加力,从而使毛坯产生变形。
本次设计为J31-250型闭式单点压力机,参照国内现有相关型号压力机,进行了2500KN机械压力机主要工作系统设计。设计分三步进行:首先,拟定总传动方案;其次,设计主要零部件;最后,进行经济评估。
本设计中主要包括以下设计部分:曲柄滑块机构的设计计算、传动系统的设计计算、离合器和制动器的设计计算、电动机的选择和飞轮的设计以及支撑附属装置的设计。
本次设计方案均采用同类设计中最新的零件类型及布置方式。通过离合器和制动器进行气动连锁控制。用电动机调节连杆的长度来达到调节装模高度的目的,以适应不同高度的模具。采用四面调节导轨,提高了压力机的精度,并装有过载保护装置、滑块平衡装置等,使机器更加安全、可靠。
关键词:锻压机械;曲柄滑块机构;闭式单点压力机
Abstract
Forge and press machine is very important in industry,it is used in almost any induetry department,such as machine,electron,national defense and so is crank forge and press machine that is most important in forge and press machine.
Crank press machine uses crank slide block mechanism as working mechanism,machine driving system passes the movement and energy of electromotor to working mechanism, bringing forge to the die by slide block,in order to let roughcast engender transmutation.
In this paper,the subject is the J31-250 closed-single punching machine,it is designed in accordance with the related machine now and designed the working system of 2500KN punching design has been done through three steps: firstly,draw up total transmission; secondly, design each part; at last, economy estimation.
In this paper, the design mainly consists of some parts: crank slide mechanism, gear deriving system, clutch and detent, electromotor and flywheel, supporting and appertain equipment.
The design program used the new parts type and arrangement. The machine works by the control of the frictional clutch and detent. Electromotor drives the link screw to fit the diffent height of die. Using four-side regulative guider, improves the precision of the punching machine. The machine has installed over loading protector, slide block balance equipment, pledging the machine work safety and dependable.
Keyword: forge