本科学生毕业设计捷达发动机连杆加工工艺及其夹具设计院系名称: 汽车与交通工程学院 专业班级: 车辆工程 07-3 班 学生姓名: 金钊 指导老师: 朱荣福 职 称: 讲师 黑 龙 江 工 程 学 院二○一一年六月The Graduation Design For Bachelor's DegreeProcessing Technology of Jetta’s Engine Connecting Rod and Fixture DesignCandidate:JinZhao Specialty:Vehicle Engineering Class:BW 07-3 Supervisor:Lecturer ZhuRongFu Heilongjiang Institute of Technology2025-06·Harbin摘 要连杆是柴油机的主要传动件之一,其在发动机中的地位是显而易见的。它是发动机传递动力的主要运动件,在机体中做复杂的平面运动,连杆小头随活塞作上下往复运动;连杆大头随曲轴作高速回转运动;连杆杆身在大、小头孔运动的合成下作复杂的摆动。连杆在承受往复的惯性力之外,还要承受高压气体的压力,在气体的压力和惯性力合成下形成交变载荷,这就要求连杆具有耐疲劳、抗冲击并具备足够的强度、刚度和较好的韧性。本文主要论述了连杆的加工工艺及其夹具设计。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;加工余量;精度;变形;加工工艺;夹具设计ABSTRACTThe connecting rod is one of the main driving medium of diesel engine, its status is obvious in engine. It is the main accessory of movement which can transmit the engine’s power. It can do the complex movement in the plane, the small connecting rod run the up and down with the piston ; the big connecting rod is rolling in high speed with crankshaft; the connecting rod’s do the complex swing with the big and small connecting rod’s movement. Beside it is stood by the reciprocating inertia force, also under great pressure and gas pressure, the gas pressure and inertia synthesis alternating load, formed under the requires connecting rod fatigue resistanc...