冷镦模具设计培训资料.pptx

第1页/共73页Assembly and setup of COD COK剪刀/剪模组立第2页/共73页Assembly and setup of COD COK1 Types of Shearing 剪切类型COK: Cut Off Knife 剪刀COD: Cut Off Die 剪体Half Cutter COK / Complete COD半剪Complete COK / Complete COD全剪第3页/共73页Assembly and setup of COD COKBasic Mechanism of Shearing剪切基础知识What Happen During Shearing:-剪切过程产生：Elastic Deformation 弹性变形Roll-over曲面Plastic shear塑性剪切Initial Fracture初始断裂Final Fracture最终断裂Physical Separation 实际剪断第4页/共73页Assembly and setup of COD COK2 Basic Mechanism of ShearingElastic Deformation 弹性变形Roll-over曲面Plastic shear塑性剪切Initial Fracture初始断裂Final Fracture最终断裂Physical Separation 实际剪断Clearance Too Big间隙太大Optimum Clearance最佳间隙Quality Problems:- 质量问题Oval Shape 椭圆形Tilting 歪斜Poor shear 剪切面粗糙Burr 毛刺Not Straight不直Clearance Too Small间隙太小第5页/共73页Assembly and setup of COD COK2 Basic Mechanism of Shearing (Half Cut COK) 半剪No Control of Blank 落料无法控制Different Shear Patterns 剪切方式不同Blank Not Straight 线材不直Big Roll-over 曲面较大 Low Cost 成本低廉Easy to Setup 安装简易Long Tool Life 模具寿命较长第6页/共73页Assembly and setup of COD COK2 Basic Mechanism of Shearing(Complete Cut 全剪)Need Relief Surfaces 需要表面退让（退剪槽〕Careful Control of Clearance 间隙要求高Difficult COK/COD Alignment 剪刀、剪体对齐困难Better Shear / Quality 较好的剪切质量Achieve Straight Blank 剪断的线材较直Small Roll-over 曲面小第7页/共73页1423344Assembly and setup of COD COKCommon Blank Quality Issue 常见的线材剪切质量问题Roll-over 曲面Plastic shear 塑性剪切Secondary Fracture / Tongue 二次断裂 / 舌状毛刺Burr 毛刺Straightness 直线性第8页/共73页Assembly and setup of COD COK4 COD COK Setting 安装Relief表面退让（退剪槽〕Small Radius小圆角 Relief表面退让（退剪槽〕第9页/共73页Assembly and setup of COD COK5 COD COK Materials 材料Tool Steel模具钢Carbide钨钢第10页/共73页Assembly and setup of COD COK6 Main Process Parameters 主要参数Material Hardness 材料硬度COK/COD Clearance 剪刀/ 剪体间隙COK/COD Diameters 剪刀/ 剪体内孔直径COK Speed 剪刀速度Lubricants 润滑Types of COK 剪刀类型Harder materials need bigger clearance, more tool relief higher speed 当剪切较硬的线材时, 需要更多的间隙, 表面退让(退剪槽)和更快的速度.Too loose the COD / COK diameters will be