WH212减速机壳体加工工艺及夹具设计 - 下载本文

图2-4

定位装置为一面两销,第一个定位销的最大工作高度为

l?0.5d2dXmind33?0.5?19?2?19?0.0119 ?6.379mm

Hmax?第二个定位销的最大高度为

L?l?0.5d2?L?d?XminL?d215?33?0.5?19?2?215?19??0.01215?19mm ?2.461

Hmax?式中d——定位销直径;

Xmin——定位 副最小间隙。

为了装卸工件方便,可使削边销低于圆柱销3~5mm。

结论:通过本次的毕业设计,使我能够对书本的知识做进一步的了解与学习,

对资料的查询与合理的应用做了更深入的了解,本次进行工件的工艺路线分析、工艺卡的制定、工艺过程的分析、镗钻夹具的设计与分析,对我们在大学期间所学的课程进行了实际的应用与综合的学习。

参 考 文 献

[1]梁炳文主编,《机械加工工艺与窍门精选》,机械工业出版社。 [2]周增文 张亮蜂等编著,《机械加工工艺基础》,中南大学出版社。 [3]郑文虎编 ,《机械加工实用经验》,国防工业出版社。 [4]李喜桥编 ,《加工工艺学》,北京航空航天大学出版社。 [5]杨方主编 ,《机械加工工艺基础》,西北工业大学出版社。 [6]陈宏均主编,《实用机械加工工艺手册》,机械工业出版社。 [7]王绍俊主编,《机械制造工艺设计手册》,哈尔滨工业大学出版社。 [8]王生力主编,《重型机械制造工艺学》,冶金工业出版社1986年。 [9]谢明才等主编,《机床夹具设计》,机械工业出版社1980。 [10]李庆寿主编,《机床夹具设计》,机械工业出版社1984。 [11]李家宝主编,《夹具设计》,机械工业出版社1961。

[12]贵州工学院机制工艺研究室编,《机床夹具结构图》,机械工业出版社1983。 [13]龚定安 蔡建国编著,《机床夹具设计原理》,陕西科技出版社,1981年。 [14]潘晓弘,《机械制造工程》,浙江大学出版社2001年。

[15]刘文剑 曹天河编著,《夹具工程师手册》,黑龙江科学技术出版社1987年。 [16]于骏一主编,《典型零件制造工艺》,机械工业出版社1989年。

[17]成大先,王德夫,姜勇,等.机械设计手册[M].北京:化学工业出版社,1993。 [18]乐兑谦主编.《金属切削刀具》机械工业出版社,1985。

致 谢

本毕业设计是在指导老师陈广陵教授和张彦博教授的指导下完

成的,在我即将完成毕业设计之际,衷心感谢陈老师和张书记的悉心指导以及在生活上给予的关心和帮助。陈老师和张书记不仅以其渊博的学识、创造性的思维方式、严谨的治学风范、高度的责任感使作者在学术上受益匪浅、而且言传身教,以其高尚的人格和坦荡宽广的胸怀教导了我做人的道理。在此毕业设计完成之际,瑾向陈老师和张书记表示最衷心的感谢,并致以崇高的敬意!

在课题的研究和设计过程中,得到了师兄的无私帮助,在此对他们表示衷心的感谢。

在设计工作中,得到了机电工程学院有关领导和老师的帮助与支持,在此表示衷心的感谢。

最后,深深地感谢父母和家人多年来的支持、理解和关心。

吴紫东

2005年6月10日

于攀枝花学院机电工程学

Personal computer Systems

When you mention the word ―technology‖, most people think about computers. Virtually every facet of our lives has some computerized component. The appliances in our homes have microprocessors built into them, as do our televisions. Even our cars have a computer. But the computer that everyone thinks of first is typical the personal computer ,or PC.

A PC is a general-purpose tool built around a microprocessor. It has lots of different parts--memory, a hard disk ,a modem ,etc.—that work together. ―General purpose‖ means that you can do many different things with a PC. You can use it to type documents, send e-mail, browse the Wed and play games. On the Inside

Let us take a lood at athe main components of a typical desktop computer.

Central processing unit(CPU)—The microprocessor ―brain‖ of the computer system is called central processing unit. Everything that a computer does is overseen by the CPU.

Memory—This is very fast storage used to hold data. It has to be fast because it connects directly to the microprocessor. There are sever specific types of memory in a computer:

Random-access memory(RAM)—Used to temporarily store information that the computer is currently worling with

Read-only memory(ROM)—A permanent type of memory storage used by the computer for important data that does not change

Basic input/output system(BIOS)—A type of ROM that is used by the computer to establish basic communication when the computer is first turned on.

Caching—The storing of frequently used data in extremely fast RAM that connects directly to the CPU

Virtual memory—Space on a hard disk used to temporarily store data and swap it in and out of RAM as needed

Motherboard—This is the main circuit board that all of the other internal components connect to. The CPU and memory are usually on the motherboard. Other system may be found directly on the motherboard or connected to it through a secondary connection. For example, a sound card can be built into the motherboard or connected though PCI.

Power supply—An electrical transformer regulates used by the computer .

Hard disk—This is large-capacity permanent storing used to hold information such as programs and documents.

Operating system—This is the basic software that allows the user to interface with the computer.

Integrated Drive Electronics(IDE)Controller—This is the primary interface for the hard drive, CD-ROM and floppy disk drive

Peripheral Component Interconnect(PCI) Bus—The mostr common way to

connect additional components to the computer, PCI uses a series of slots on the motherboard that PCI cards plug into .

SCSI—The small computer system interface is a method of adding additional devices, such as hard drives or scanners, to the computer.

AGP—Accelerated Graphics Port is a very high-speed connection used by the graphics card to interface with the computer.

Sound card—This is used by the computer to record and play audio by converting analog sound into digital information and back again.

Graphics card—This translates image data from the computer into a format that can be displayed by the monitor. Connections

No matter how powerful the components inside your computer are ,you need a way to interact with them. This interaction is called input/output(I/O). The most common types of I/O in PCs are

Monitor—The monitor is the primary device for displaying information from the computer.

Keyboard—The keyboard is the primary device for entering information into the computer.

Mouse—The mouse is the primary device for navigating and interacting with the computer

Removable srorage—Removale storage devices allow you to add new information to your computer very easily, as well as save information that you want to carry to a different location

Floppy disk—The most common form of removable storage , floppy disks are extremely inexpensive and easy to save information to .

CD-ROM—CD-ROM(compact disc, read-only momory) is a popular form of distribution of commercial software. Many sysrems mow offer CD-R (recordable) and CD-RW(rewritable), which can also record .

Flash memory—Based on a type of ROM called electrically erasable programmable read-only memory (EEPROM), Flash memory provides fast, permanent storage. Compact Flash, Smart Media and PCMCIA cards are all types of Flash memory.

DVD-ROM—DVDROM is similar to CD-ROM but is capable of holding much more information Ports

Parallel—This port is commonly used to connect a printer. Serial—This port is typically used to connect an external modem.

Universal Serial Bus (UBS)—Quickly becoming the most popular external connection, UBS ports offer power and versatility and are incredibly easy to use

Fire-Wire(IEEE1394)—Fire-Wire is a very popular method of connecting digital video devices, such as camcorders or digital cameras, to your computer. Internet/network connection

Modem—This is the standard method of connecting to the Inernet

Local area network(LAN) card—This is used by many computers, particularly