Blanking force is the pressure exerted by the punch on the sheet during blanking, which varies with the depth of the punch into the material. Generally speaking, blanking force refers to the maximum value of blanking force, which is one of the important basis for selecting press and designing die.
When punching with a common flat-edged die, the punching force f is generally calculated as follows:
F=KLtτb (3-2)
= 1.3×296× 1.5×260
= 150KN
Where f- blanking force.
L- punching perimeter
T- material thickness
τ b-shear strength of material (τb=260MPa)
K coefficient (generally K= 1.3)
Eyes? record
1, summary 4
2. Introduction 5
2. 1 Analysis on the Development Prospect of Mould Industry 5
2.2 Brief Analysis of Development Trend of Mould Industry 5
2.3 the concept, characteristics and application of stamping 6
2.4 Basic stamping process and die 7
3. Design Scheme 8
3. 1 Part 9 Technical Requirements
3.2 Determination of blank size 9
3.2. 1 Determine the blank height of deep drawing of box-shaped part 9
3.2.2 Select blank type 3.
2.3 Determine the blank ruler 9
3.2.4 Determine the blank drawing 10
3.3 Determination of stamping process scheme 10
3.4 Cutting and Layout Design. 1 1
3.4. 1 Determination of blanking and layout scheme
3.5 Selection of grinding edge 12
3.6 Calculation of feeding step, belt width and plate spacing 13
3.6. 1 feed step
3.6.2 Calculation of Slab Width and Plate Spacing 13
3.7 Part Layout 14
3.7. 1 Parts Layout 14
3.7.2 Material utilization rate 15
3.8 Determination of each working procedure 15
3.9 Calculation of punching force and pressure center 16
3.9. 1 Calculation of blanking force 16
3.9.2 Calculation of Drawing Force 16
3.9.3 Calculation of thrust 17
3.9.4 Calculation of BHF 17
3.9.5 Calculation of impact force 18
3.9.6 Calculation of punching and discharging force 18
3.9.7 Calculation of Stamping Thrust 18
3.9.8 Calculation of Pressure Center 18
3. Calculation of cutting edge size10/9
3. 10. 1 Calculation of punching edge size 2 1
3. 10.2 Calculation of blanking edge size 2 1
3. 1 1 Structure and design of main parts of blanking die 22
3. 1 1. 1 mold type selection 22
3. 1 1.2 Selection of Positioning Mode 23
3. 1 1.3 Selection of discharging device and pushing device 24
Design of working parts 26
3. 12. 1 Design of female die 26
3. 12.2 Design of punch and die 27
3. 12.3 design of punch 28
3. 12.4 Design of formwork and components 30
3. 13 Selection and inspection of press 3 1
3. 13. 1 Select and press 3 1
3. 13.2 Verification of mold loading height 32
3.4. General Assembly Drawing 32
3.5 Selection of Mould Materials 32
3.6 Assembly and Inspection of Mould 32
3.6. 1 assembly of mold 32
3.6.2 Inspection of Mould 32
Summary? 33
Thanks 35
Reference 36
Chinese-English comparison of foreign language materials 38 pages
English 38
Chinese 43