汽车发动机曲轴机械加工工艺规程与夹具设计
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关键词
ABSTRACT
Crankshaftis a very important parts ofdiesel engine. Ist action is change the to and fro straight-line motion of thepistoninto rotary motion,and change the gas pressure on the piston intotorque, that is used to drive executive body and accessory system of the diesel engine. Crankshaft is withstanding the changing pressure, inertia force and the torque. So the crankshaft mast have high strength, high rigidity, high abrasion resistance and the surface of axle journal must have high precision with well lubricating.
本设计是根据被加工曲轴的技术要求基准先行，先主后次，先粗后精，先面后孔的工艺设计准则。先加工出基准，再用精基准定位加工其它工序。在夹具设计时，选择的是车曲轴连杆轴颈的工序，定位时选择两个V形块和周向定位钉定位，用压板夹紧，并且在夹具上设置合适的偏心距。通过本次设计我查阅了许多书籍和行业资料，了解到行业的发展进程和部分先进技术，扩展了我的专业视野，为将来的学习生活都有着重要的影响。
毕业论文
（科学研究报告）
题目
汽车发动机四缸曲轴加工工艺
及夹具设计
院(系)别
机电及自动化学院
专 业
机械工程及自动化
级 别
2009
学 号
*****
姓 名
***
指导老师
*** 副教授
** 大 学 教 务 处
2013年6月
摘
曲轴是汽车发动机的Байду номын сангаас要零件。它的作用是把活塞的往复直线运动变成传动轴的旋转运动，将作用在活塞的气体压力变成扭矩，用来驱动工作机械和发动机各辅助系统进行工作。曲轴在工作时承受着不断变化的压力、惯性力和它们的力矩作用，因此要求曲轴具有强度高、刚度大、耐磨性好，轴颈表面加工的尺寸精确，且润滑可靠。
This design is in order to improve the crankshaft parts production efficiency, and the machining accuracy. Therefore,when drawing up the process we strict accordance with the design criteria that benchmark first,main first then secondary, rough first then essence, surface first，hole after . First, work out benchmark, again with pure reference positioning processing other processes. In fixture design,I choose the car process of crankshaft connecting rod , When location,I choose two V block and circumferential locating pin to positioning, pressed powder compact, and set up appropriate eccentricity on the jig.
This design is on the basis of technical requirement of the crankshaft to design the technological procedure. And then use the fundamental and method of thefixturedesign to fix the fixture design programme,and complete the structural of the fixture. The main work is: Parts drawing, understand the characteristic ofstructureand technical requirement; Accroding to the types of manufacturing and the plant conditions of the company we will analyse the structure and craft of the crankshaft; Fix the type and manufacturing method of the roughcast; Fix the processing technic of the crankshft,select device and equipment fix the machining allowance and working procedure size and count the cutting specifications and time allowance.; Fix the Processing technological process card and Machine-finishing operation card; Design the special fixture and plan the assembling drawing and main parts drawing.
Accroding tothis design I looked through many books and industry information, understand some of the industry development process and advanced technologies,and also expanded my professional field.It has important influence on my future study and life.
ABSTRACT
Crankshaftis a very important parts ofdiesel engine. Ist action is change the to and fro straight-line motion of thepistoninto rotary motion,and change the gas pressure on the piston intotorque, that is used to drive executive body and accessory system of the diesel engine. Crankshaft is withstanding the changing pressure, inertia force and the torque. So the crankshaft mast have high strength, high rigidity, high abrasion resistance and the surface of axle journal must have high precision with well lubricating.
本设计是根据被加工曲轴的技术要求基准先行，先主后次，先粗后精，先面后孔的工艺设计准则。先加工出基准，再用精基准定位加工其它工序。在夹具设计时，选择的是车曲轴连杆轴颈的工序，定位时选择两个V形块和周向定位钉定位，用压板夹紧，并且在夹具上设置合适的偏心距。通过本次设计我查阅了许多书籍和行业资料，了解到行业的发展进程和部分先进技术，扩展了我的专业视野，为将来的学习生活都有着重要的影响。
毕业论文
（科学研究报告）
题目
汽车发动机四缸曲轴加工工艺
及夹具设计
院(系)别
机电及自动化学院
专 业
机械工程及自动化
级 别
2009
学 号
*****
姓 名
***
指导老师
*** 副教授
** 大 学 教 务 处
2013年6月
摘
曲轴是汽车发动机的Байду номын сангаас要零件。它的作用是把活塞的往复直线运动变成传动轴的旋转运动，将作用在活塞的气体压力变成扭矩，用来驱动工作机械和发动机各辅助系统进行工作。曲轴在工作时承受着不断变化的压力、惯性力和它们的力矩作用，因此要求曲轴具有强度高、刚度大、耐磨性好，轴颈表面加工的尺寸精确，且润滑可靠。
This design is in order to improve the crankshaft parts production efficiency, and the machining accuracy. Therefore,when drawing up the process we strict accordance with the design criteria that benchmark first,main first then secondary, rough first then essence, surface first，hole after . First, work out benchmark, again with pure reference positioning processing other processes. In fixture design,I choose the car process of crankshaft connecting rod , When location,I choose two V block and circumferential locating pin to positioning, pressed powder compact, and set up appropriate eccentricity on the jig.
This design is on the basis of technical requirement of the crankshaft to design the technological procedure. And then use the fundamental and method of thefixturedesign to fix the fixture design programme,and complete the structural of the fixture. The main work is: Parts drawing, understand the characteristic ofstructureand technical requirement; Accroding to the types of manufacturing and the plant conditions of the company we will analyse the structure and craft of the crankshaft; Fix the type and manufacturing method of the roughcast; Fix the processing technic of the crankshft,select device and equipment fix the machining allowance and working procedure size and count the cutting specifications and time allowance.; Fix the Processing technological process card and Machine-finishing operation card; Design the special fixture and plan the assembling drawing and main parts drawing.
Accroding tothis design I looked through many books and industry information, understand some of the industry development process and advanced technologies,and also expanded my professional field.It has important influence on my future study and life.