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
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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)
4. Burr
毛刺
5. Straightness
实用精品培训课件直PP线T 性
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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
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（退剪槽〕
Clearance Too Small 间隙太小
Optimum Clearance
最佳间隙 Quality Problems:- 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
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
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
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
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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
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
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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
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.
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
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Assembly and setup of COD & COK
6 Main Process Parameters 主要参数
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
Half Cutter COK / Complete COD Complete COK / Complete COD
半剪
全剪
实用精品培训课件PPT
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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：
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
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
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Assembly and setup of COD & COK 2 Basic Mechanism of Shearing