机械5

摘要 本文设计的阀体零件加工工艺规程及其夹具的工艺装备设计中主要包括零件加工的工艺设计、工序设计以及专用夹具的设计三部分。在工艺设计中要首先对零件进行分析，了解零件的工艺再设计出毛坯的结构，并选择好零件的加工基准，设计出零件的工艺路线;接着对零件各个工步的工序进行尺寸计算，关键是决定出各个工序的工艺装备及切削用量:然后进行专用夹具的设计，选择设计出夹具的各个组成部件，如定位元件、夹紧元件、引导元件、夹具体与机床的连接部件以及其它部件，计算出夹具定位时产生的定位误差，分析夹具结构的合理性与不足之处，并在以后设计中注意改进。关键词:工艺，工序，切削用量，夹紧，定位，误差。 Abstract The desig
n of thevalve body parts processi
ng tech
nology regulatio
ns a
nd fixture tech
nology equipme
nt desig
n mai
nly i
ncludes parts processi
ng tech
nology desig
n, process desig
n a
nd special fixture desig
n three parts. I
n the process desig
n,we should first a
nalyze the parts, u
ndersta
nd the parts of the process a
nd the
n desig
n the bla
nk structure, a
nd choose a good part of the processi
ng be
nchmark, desig
n the process of the parts; The
n the parts size of eachwork step of the process, the key is to determi
ne the process equipme
nt for eachworki
ng procedure a
nd cutti
ng dosage: the
n for the desig
n of special fixture, choose to desig
n the compo
ne
nt parts of the fixture, such as the positio
ni
ng device, clampi
ng device a
nd guide the specific compo
ne
nts, clip a
nd co
n
nectio
n parts a
nd other parts of machi
ne a
nd calculate the fixture positio
ni
ngwhe
n positio
ni
ng error, a
nalysis the ratio
nality of the fixture structure a
nd deficie
ncy, a
nd pay atte
ntio
n to the improveme
nt i
n the later desig
n. Keywords: process, process, cutti
ng parameters, clampi
ng, positio
ni
ng, error. 目录 1引言1 1.1背景现状1 1.2本文主要研究内容1 2零件的分析2 2.1生产纲领2 2.2零件的作用2 2.3零件的工艺分析2 2.4毛坯的结构确定3 2.4.1毛坯的结构工艺要求3 2.4.2毛坯形状、尺寸确定的要求3 2.5毛坯类型3 2.6毛坯余量确定4 2.7工艺设计原则4 2.7.1加工方法的选择5 2.7.2加工阶段的划分5 2.7.3工序的合理组合6 3制定工艺路线7 3.1工艺路线方案7 3.2设备及其工艺装备确定7 3.3主要工序切削用量及工时计算8 4夹具设计11 4.1夹具的作用11 4.2车床夹具的主要类型11 4.3阀体零件的车床专用夹具的总体设计11 4.4钻φ 20孔夹具设计12 4.5夹具精度分析13 参考文献15