Shielding Case Stamping Process And Die Design
Summary:Punching die has been widely used in industrial production.The punching dies that utilized the feature of the normal punch shaped the workpiece in the room temperature,and its efficiency and economic situation is excellent. The dies here discussed can be easily made,conveniently used, and safely operated.And it could be used as the reference in the large scale production of similar workpieces. Punching die has been widely used in industrial production.In the traditional industrial production,the worker work very hard,and there are too much work,so the efficiency is low.With the development of the science and technology nowadays,the use of punching die in the industial production gain more attention, and be used in the industrial production more and more.Self-acting feed technology of punching die is also used in production, punching die could increase the efficience of production and could alleviate the work burden，so it has significant meaning in technologic progress and economic value.
Keywords: stamping, die manufacturing
The main content of this research
1.shielding case blanking process scheme;
2.shielding case mold overall design;
3. The size of the mold parts calculation;
4. The mold assembly drawing and parts drawing.
Comprehensive analysis shielding case processing
1.1 shielding case processing requirements
The shielding case parts are shown in Figure 1-1. The material is 304 stainless steel. The material thickness is 0.8mm. The annual output is 100,000 pieces. It is mass-produced. Requires no surface scratches, holes should be no significant deformation, notching burr, Flanging without crack. Its design stamping die, to determine a stamping process program. (304 material yield strength is 200MPa, tensile strength is about 540-700MPa, shear strength is about 430-550MPa, with good plasticity, its punching, forming processability is better.)
Figure 2-1 Shielding case Parts drawing
2.2 Analysis of Parts Drawings
The dimensional accuracy of the piece is not high, and it can be formed by punching and flanging.
The difficulty in stamping is how to calculate the size of the mold, the structural design of the mold, and to ensure that the product cannot be deformed.
2.3 Stamping process review
Based on the analysis of the stamping process, review its contents shown in the following table:
Table 2-1 stamping process examination table
Keywords: stamping, die manufacturing
The main content of this research
1.shielding case blanking process scheme;
2.shielding case mold overall design;
3. The size of the mold parts calculation;
4. The mold assembly drawing and parts drawing.
Comprehensive analysis shielding case processing
1.1 shielding case processing requirements
The shielding case parts are shown in Figure 1-1. The material is 304 stainless steel. The material thickness is 0.8mm. The annual output is 100,000 pieces. It is mass-produced. Requires no surface scratches, holes should be no significant deformation, notching burr, Flanging without crack. Its design stamping die, to determine a stamping process program. (304 material yield strength is 200MPa, tensile strength is about 540-700MPa, shear strength is about 430-550MPa, with good plasticity, its punching, forming processability is better.)
Figure 2-1 Shielding case Parts drawing
2.2 Analysis of Parts Drawings
The dimensional accuracy of the piece is not high, and it can be formed by punching and flanging.
The difficulty in stamping is how to calculate the size of the mold, the structural design of the mold, and to ensure that the product cannot be deformed.
2.3 Stamping process review
Based on the analysis of the stamping process, review its contents shown in the following table:
Table 2-1 stamping process examination table
| Craft projects | Stamping process characteristics | Technological allowable value | Process evaluation |
| Blanking process | |||
| 1. Shape | Blanking | ||
| Accuracy grade IT14 | |||
| Flanging processability | |||
| 1. Shape | Four sides flanging, symmetry | ||
| 2. Flange radius | R1 | ||
| 3. Straight edge height | Flanging highly consistent | ||
| 4. Accuracy | IT14 |
It can be seen from the above analysis that the part has good workability and can be processed by pressing.
2.4 Analysis of the economics and advancement of stamping parts
Stamping is the best way to machine this part.
Due to the large batch size, in order to increase productivity, a simple combination process is preferred.
2.5 Determination of process plan
Option 1: First, the whole material is blanked and then turned over;
Option 2: Punching the side blade, cutting waste, flanging, empty step, and finally cutting off the product.
The comprehensive comparison of the above three options is shown in the following table:
2.4 Analysis of the economics and advancement of stamping parts
Stamping is the best way to machine this part.
Due to the large batch size, in order to increase productivity, a simple combination process is preferred.
2.5 Determination of process plan
Option 1: First, the whole material is blanked and then turned over;
Option 2: Punching the side blade, cutting waste, flanging, empty step, and finally cutting off the product.
The comprehensive comparison of the above three options is shown in the following table:
Table 2-2 Comparison table of stamping process plan
| Project | Option One | Option II |
| Number of molds | Two sets | 1 set |
| Manufacturing quality | Rebound, not easy to control | Good shape and dimensional accuracy, rebound, controllable |
| productivity | Higher | Higher |
| Die life | The structure is complex, the production efficiency is high, the mold cost is high, the maintenance is difficult, and the rebound cannot be controlled. |
