文档介绍：连杆机加工工艺及主要装备的设计
机械设计制造及其自动化机自指导老师
摘要
连杆机构是两端分别与主动和从动构件铰接以传递运动和力的杆件。例如在往复活塞式动力机械和压缩机中,用连杆来连接活塞与曲柄。连杆也是柴油机的主要传动件之一,本课题主要研究连杆的加工工艺及相关夹具的设计。连杆的尺寸精度、形状精度以及位置精度的要求都很高,而连杆的刚性比较差,容易产生变形,因此在安排工艺过程时,就需要把各主要表面的粗精加工工序分开。逐步减少加工余量、切削力及内应力的作用,并修正加工后的变形,就能最后达到零件的技术要求。
关键词: 连杆加工工艺夹具设计
The machining technology and the design of clamping device of the connecting rod
Abstract
The connecting rod is a kind of rod which connects driving member with driven member to transport power and movement. For example in reciprocating piston power machine pressors, the connecting rod is used to connect piston with crank. The connecting rod is one of the main driving medium of diesel engine, this text expounds mainly the machining technology and the design of clamping device of the connecting rod. The precision of size, the precision of profile and the precision of position , of the connecting rod is demanded highly , and the rigidity of the connecting rod is not enough, easy to deform, so arranging the craft course, need to separate the each main and superficial thick finish machining process. Reduce the function of processing the surplus , cutting force and internal stress progressively , revise the deformation after processing, can reach the specification requirement for the part finally .
Keyword: Connecting rod Processing technology Design of clamping device
目录
绪论 1
第一章连杆加工工艺 2
连杆的结构特点 2
连杆的机械加工工艺过程分析 3
工艺过程的安排 3
定位基准的选择 3
确定合理的夹紧方法 4
连杆加工工艺设计应考虑的问题 5
5
5
5
切削用量的选择原则 5
粗加工时切削用量的选择原则 5
精加工时切削用量的选择原则 6
连杆的机械加工工艺过程 7
确定各工序的加工余量、计算工序尺寸及公差 9
确定加工余量 9
确定工序尺寸及其公差 10
计算工艺尺寸链 11
连杆盖的卡瓦槽的计算 11
连杆体的卡瓦槽的计算 12
工时定额的计算 13
铣连杆大小头平面 13
粗磨大小头平面 13
加工小头孔 14
铣大头两侧面 15
扩大头孔 16
铣开连杆体和盖 16
加工连杆体 17
铣、磨连杆盖结合面 19
铣、钻、镗(连杆总成体) 21
粗镗大头孔 23
大头孔两端倒角 24
精磨大小头两平面(先标记朝上) 24
半精镗大头孔及精镗小头孔 2