冷镦模具设计培训资料

Half Cutter COK / Complete COD Complete COK / Complete COD
半剪
全剪
实用精品培训课件PPT
3
Assembly and setup of COD & COK
2 Basic Mechanism of Shearing 剪切基础知识
What Happen During Shearing:剪切过程产生：
1. Need Relief Surfaces
需要表面退让（退剪槽〕
2. Careful Control of Clearance 间隙要求高
3. Difficult COK/COD Alignment 剪刀、剪体对齐困难
4. Better Shear / Quality
较好的剪切质量
5. Achieve Straight Bla实n用k精品培训课件PP剪T 断的线材较直
实用精品培训课件PPT
10 Jan 21011
1. Assembly and setup of COD & COK 剪刀/剪模组立
实用精品培训课件PPT
2
Assembly and setup of COD & COK
1 Types of Shearing 剪切类型 COK: Cut Off Knife 剪刀 COD: Cut Off Die 剪体
1. Elastic Deformation 弹性变形
2. Roll-over
曲面
3. Plastic shear
塑性剪切
4. Initial Fracture 初始断裂
5. Final Fracture
最终断裂
6. Physical Separation 实际剪断
实用精品培训课件PPT
4
Assembly and setup of COD & COK 2 Basic Mechanism of Shearing
7
6. Small Roll-over
曲面小
Assembly and setup of COD & COK
3 Common Blank Quality Issue
常见的线材剪切质量问题
1
4 2
3 4
3 4
1. Roll-over
曲面
2. Plastic shear
塑性剪切
3. Secondary Fracture / Tongue 二次断裂 / 舌状毛刺
1. Elastic Deformation 弹性变形
2. Roll-over
曲面
3. Plastic shear
塑性剪切
4. Initial Fracture 初始断裂
5. Final Fracture
最终断裂
6. Physical Separation 实际剪断
Clearance Too Big 间隙太大
Contents of the Training 培训内容
• Assembly and setup of COD & COK 剪刀/剪模组立 • Assembly and setup of main dies主模组立 • Assembly and setup of punches冲头组立/失效分析 • Understand steel & carbide tools模具组立/材料/钨钢 • Understand tool surface & friction 模具表面/摩擦系数 • Understand the effect of preform预成形分析
线材不直
4. Big Roll-over
曲面较大
5. Low Cost
成本低廉
6. Easy to Setup
实用精安品装培训简课件易PPT
6
7. Long Tool Life
模具寿命较长
Assembly and setup of COD & COK
2 Basic Mechanism of Shearing (Complete Cut 全剪)
Assembly and setup of COD & COK 5 COD & COK Materials 材料
Tool Steel 模具钢
Carbide 钨钢
实用精品培训课件PPT
10
Assembly and setup of COD & COK
6 Main Process Parameters 主要参数
Assembly and setup of COD & COK 2 Basic Mechanism of Shearing (Half Cut COK) 半剪
1. No Control of Blank 落料无法控制
2. Different Shear Patterns 剪切方式不同
3. Blank Not Straight
Clearance Too Small 间隙太小
Optimum Clearance
最佳间隙 Quality ProBiblioteka Baidulems:- 质量问题
1. Oval Shape 椭圆形
2. Tilting
歪斜
3. Poor shear 剪切面粗糙
实用精品培训课件PPT
4. Burr
毛刺5
5. Not Straight 不直
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 bend the blank and cause taper ends
剪刀/ 剪体的内孔直径太大时, 会造成线材弯曲, 线材末端缩小.
4. Burr
毛刺
5. Straightness
实用精品培训课件直PP线T 性
8
Assembly and setup of COD & COK
4 COD & COK Setting 安装
Relief 表面退让 （退剪槽〕
Small Radius
小圆角
Relief
实用精品培训课件PPT 表面退让
9
（退剪槽〕
1. Material Hardness 材料硬度
2. COK/COD Clearance 剪刀/ 剪体间隙
3. COK/COD Diameters 剪刀/ 剪体内孔直径
4. COK Speed
剪刀速度
5. Lubricants
润滑
6. Types of COK
剪刀类型
•Harder materials need bigger clearance, more tool relief & higher speed