摘要

夹具是零件加工的夹紧装置，是加工零件的一种必不可少的装置。夹具利用率高，经济性好，对功能组件的使用和数量少。随着零件的尺寸变化，越来越多的夹具被淘汰了，因此，设计一套专用夹具是十分有必要的。在设计专用夹具时要考虑工件的定位方案，工件的夹紧方案和设计夹紧机构，夹具的其他组成部分，夹具的结构形式等。
夹具主要依据零件的加工要求来设计的。夹具应满足零件加工工序的精度要求、加工生产率要求，并保证操作方便、安全及使用寿命和较低的夹具制造成本。本课题设计的题目是汽车进水管零件夹具设计。其零件是汽车进水管，进水管是一种很重要的零件，主要作用是汽车在行驶的过程中会产生热量，通过其用水来降温，以保证汽车在行驶过程中安全。本文就镗Φ42.9及镗Φ37所在4.4的槽设计出在卧式铣床上加工的专用夹具。本夹具体是以保证加工精度，生产效率和便于工人操作为宗旨展开的设计。
设计之初我查阅相关数据及国内外关于机床夹具的文献，在看懂零件图的同时对零件的结构和工艺进行分析，明确粗基准和精基准的选择，确定零件的加工余量与毛坯的尺寸、从而确定零件的加工工艺过程、计算各工序的切削用量及工时。最终完成了本次设计所需的夹具。
关键词：夹具、夹紧装置、汽车进水管、基准

ABSTRACT

Clamping device clamps are machined parts , is an essential part of the processing unit . Fixture high utilization, the economy is good , less use of functional components and quantities . As part of dimensional changes , more and more fixtures to be eliminated , so design a special fixture is very necessary . In the design of special fixtures to consider when positioning scheme workpiece clamping scheme and design workpiece clamping mechanism , other components of the jig , fixture and other structural forms .
Processing requirements based primarily on fixture parts to design. Fixture parts shall meet the accuracy requirements of the machining process , processing productivity requirements, and to ensure ease of operation , safety and service life and lower fixture manufacturing costs. This topic is the subject of design auto parts inlet fixture design . Its parts are car into the water , into the water is a very important part , the main role is in the process of moving car generates heat through its water to cool down, to ensure vehicle safety during driving . This paper slot and boring boring Φ42.9 Φ37 located 4.4 to design special fixture on the horizontal milling machining . The specific folder is to ensure accuracy , productivity and ease of operation for the purpose of workers expanded design.
I looked at the beginning of the design -related data and literature on the machine fixture , while in parts diagram understand the structure and process parts for analysis, clear benchmarks and fine benchmark crude choices determine allowances and rough parts size , to determine the machining process parts , cutting the amount of calculation and working hours of each process . The design of the final completion of the required fixture.
Keywords : fixtures, clamping devices , car into the water , the benchmark