文档介绍：摘要
电火花线切割加工(wire-EDM)是一种基于电火花性流程加加工技术的适应性流程加工技术,它可以被用在具有二维到三维复杂形状的而且是导电的原材料的加工上。电火花线切割加工最常见的应用是在压模,挤压模,粉末合金的铸模和标准模板的装配工中。这样就可以加工出以往依靠花费很高模床或者昂贵的传统意义上的电火花的电极来进行加工的工件。由于电火花线切割加工技术是机电一体化技术,是机械、电工、电子、数控、自动控制、计算机应用等多门学科、专业知识的综合运用。
我的设计课题是DK7732数控电火花线切割加工机床。DK为数控电加工机床,77为电火花线切割机床。32为机床工作台宽度。
此次设计包括机床的总体布局设计,横向进给,纵向进给设计。其中还包括齿轮的强度计算,滚珠丝杆校核,轴承寿命的验算。控制系统包括步进电机控制电路和脉冲电路,这是数控电火花加工机床的重点设计部分,也是难点。步进电机电路设计包括硬件电路设计和软件系统设计。详细说明了芯片的扩展、键盘显示器接口的设计等等。脉冲电源电路采用高低压复式脉冲电源,它是由晶体管及分立元件组成的电路,输出高低压复式脉冲,可以同时供给两个放电间隙加工,提高生产效率。
关键词数控电火花切割加工;主轴运动;步进电机;脉冲电源
ABSTRACT
Wire electrical-discharge machining (wire-EDM) I is an adaptation of the basic EDM process, which can be used for plex two-and three-dimensional shapes through electrically conducting materials. Wire-EDM is monly usedfor the fabrication of press stamping dies ,extrusion dies, position dies,profile gages, and templates. Complicated cutouts can b made in difficult-to-machine metals without the need for high-cost grinding or expensive shaped EDM electrodes. Because the technology of wire electrical-discharge machining is the technology of mechatronics , and it is the integrate application of many subjects and professional knowledge , for example mechanism , electrician , electron , numerical control , auto control puter application.
My design subject is DK7732 numerical control electrical-discharge perforation molding machining tool . DK means numerical control machining tool. 77 means wire Electrical-discharge perforation molding machining tool. 32 means the width of tool’s worktable.
The design contains collectivity distribution design , landscape orientation feed design, circumgyrate worktable design. It still includes intension calculation of gear wheel , the checking of part contains the circuit of pulse electrical source. This part is the most important part of numerical control electrical-discharge machining tool, and it is very hard for me. The design of step-by-step electromotor control includes hardware circuit desig