机械5

泥浆泵下阀体机械加工工艺与镗左圆孔Φ201专用夹具设计 摘要：泥浆泵，是指在钻探过程中向钻孔里输送泥浆或水等冲洗液的机械。泥浆泵是钻探设备的重要组成部分。阀体是主要零件，它的加工质量将直接影响到整个系统的运行。国内的普通机床对于阀类零件的加工，产品的精度达不到要求和机床本身精度的限制，生产效率也比较低，加工的质量相对不稳定，我们可以从零件的加工工艺上下手，来进行一些改进，提高产品的品质，并设计相关的夹具。先分析其结构，并对其制定相应的机械加工工艺规程，合理安排加工工序，并对切削用量及工时进行计算。再设计制作镗削加工φ201的孔专用镗夹具，并对夹具的进行说明，和相应的误差分析。 关键词：泥浆泵；下阀体；工艺；夹具 Desig
n of Machi
ni
ng Tech
nology a
nd fixture for Valve body u
nder Mud pump Abstract: Mud pump, refers to the drilli
ng process to the borehole mud orwater a
nd otherwashi
ng fluid machi
nery.Mud pump is a
n importa
nt part of drilli
ng equipme
nt.Valve body is the mai
n part, its machi
ni
ng qualitywill directly affect the operatio
n of the e
ntire system.For the machi
ni
ng ofvalve parts by domestic ordi
nary machi
ne tools, the precisio
n of the products ca
n
not meet the requireme
nts a
nd the precisio
n of the machi
ne tools themselves is limited, the productio
n efficie
ncy is also relatively low, the quality of the machi
ni
ng is relatively u
nstable,we ca
n start from the processi
ng tech
nology of the parts.To make some improveme
nts, improve the quality of the product, a
nd desig
n related fixtures.First of all, the structure of the machi
ne is a
nalyzed, a
nd the correspo
ndi
ng machi
ni
ng process rules areworked out, the machi
ni
ng procedures are arra
nged reaso
nably, a
nd the cutti
ng parameters a
ndworki
ng hours are calculated.The special bori
ng fixture for bori
ngφ 201 is desig
ned a
nd ma
nufactured, a
nd the fixture is explai
ned, a
nd the correspo
ndi
ng error a
nalysis is made. Keywords:Mud pump; Lower body; Process; Fixture 目录 1绪论1 1.1机械制造的重要性1 1.2夹具的发展历史1 1.3课题的背景1 1.4课题研究方法2 1.5小结2 第二章零件分析3 2.1零件图样的分析3 2.2零件结构工艺的分析3 2.4零件的加工表面技术要求4 2.5确定铸件余量及其形状4 第三章机械加工的工艺过程设计6 3.1首先选择定位的基准6 3.2拟订工艺的过程6 3.2.2．工艺过程方案的确定6 第四章加工设备及其工艺装备的选择11 4.1根据其不同的工序而选择不同的机床11 4.2刀具选择夹具以及量具11 第五章工序尺寸及确定切削用量15 5.1主要工件的加工面的尺寸15 5.2及其相关孔系的序尺寸15 第六章专用夹具的结构设计17 6.1明确设计任务以及收集分析原始资料17 6.2夹具结构及类型18 6.3夹具的结构19 6.4夹具精度分析19 6.5镗夹具定位误差的分析21 7结论22 参考文献23 致谢24