摘要
设计偏心柱塞泵零件的机械加工工艺规程及工艺装备，通过对偏心柱塞泵零件的了解，根据它的形状、尺寸精度、生产的经济效益等各方面的详细分析其加工工艺，采用多工序，数控机床加工。通过对零件的分析，此偏心柱塞泵零件要求精度高，工序适当集中，要求光滑，所以选用的工具和尺寸要量得准。最后对零件进行校核。以便达到零件精度的要求。
偏心柱塞泵压盖采用灰铸铁HT150，它有容易变形，吸振性好，耐磨性及切削性好等特点。当生产批量不大时偏心柱塞泵零件泵体毛坯采用木模手工造型，制作简单但毛坯精度较低，余量也较大，大批、大量生产时则采用金属模机器造型。毛坯精度高，余量可适当减少。在单件生产时，有时采用焊接件作毛坯，以缩减短生产周期。
本课题旨在研究偏心柱塞泵零件的加工工艺及对泵体数控加工夹具的设计，其主要目的是能够达到快速装夹、定位，结合实际，确保加工质量的前提下，达到提高生产速率，降低生产成本。
关键词：数控编程，加工工艺，偏心柱塞泵泵体，夹具
ABSTRACT
Design eccentric piston pump parts of the pump cover before the machining process procedures and process equipment, through before the pump cover for gear pump understanding, according to its shape, size accuracy, production of economic benefits of each respect such as detailed analysis its processing technology, using more processes, CNC machine processing. Based on the analysis of the components, the gear pump pump cover requirements before high precision, processes, demanding smooth, appropriate concentration selection of tools and size so to measure whether. Final test of parts. In order to reach the accuracy requirement of the parts.
Before using grey side-plate pump cover HT150, it has easy deformation of good, and vibration, wear resistance and cutting sex is good wait for a characteristic. When the production batch is not big gear pump parts by former pump cover blank block, make simple but manual modelling, allowance low precision blank is larger also, large, mass-prod
uced using metal mould machine is modelling. Blank high precision can be reduced suitably, allowance. In single production ", sometimes use as a blank, to cut short production cycle.
This research is aimed to study the eccentric piston pump parts processing and the pump body of CNC machining fixture design, its main purpose is to achieve quick clamping, positioning, combined with the actual, to ensure that the processing quality of the premise, to improve production rate, reduce the production cost.
Key words:Numerical control programming, processing technology, eccentric piston pumps, fixture
摘要(中文)………………………………………………………………………Ⅰ
摘要(外文)……………………………………………………………………………Ⅱ
1.绪论…………………………………………………………………………………1
2.偏心柱塞泵的概述………………………………………………………………1
2.1 偏心柱塞泵的简介…………………………………………………………1
2.2 偏心柱塞泵的结构组成……………………………………………………2
2.3 偏心柱塞泵的结构特点……………………………………………………2
2.4偏心柱塞泵的工作原理…………………………………………………3
2.5设计偏心柱塞泵的填料压盖…………………………………………4
2.5.1填料压盖的零件图…………………………………………………………4
2.5.2 填料压盖的用途……………………………………………………………4
2.5.3零件外形和特点分析………………………………………………………4
2.5.4普通机床加工工艺分析……………………………………………………5
3.压盖加工工艺规程设计……………………………………………………………6
3.1 确定毛坯的制造形式…………………………………………………………6
机械加工工艺系统 3.2拟定工艺路线…………………………………………………………………6
3.3 定位基准的选择………………………………………………………………7
3.4 工序顺序的安排………………………………………………………………7
3.5 机械加工余量、工序尺寸及毛坯尺寸的确定………………………………8
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