Dia-forming by Deep Drawing Technique:
Unit Blanking Force to Prevent Wrinkles in Cylindrical Parts
North America has been utilizing deep drawing techniques for over sixty years for the performance of a variety of stamping operations. The deep drawing process is commonly used in the creation of cylindrical parts made from flat sheets of metal. The process involves the use of a punch, which pushes the material into a die cavity to produce a final shape. While it is relatively simple to understand how the process works, determining the unit blanking force required to achieve a good part is more of a challenge. In this article, well take a look at how the unit blanking force is determined when deep drawing cylindrical parts.
When performing deep drawing operations, the most important factor that must be taken into consideration is the blanking force. This is the amount of force required to punch the material into the die cavity. In most cases, the blanking force will depend on the material being used, but the size and shape of the part can also play a role. Its important to note that the amount of blanking force will vary depending on the complexity of the part being formed. However, there are some basic methods that can be used to determine the force needed for a good quality part.
One of the most common methods for calculating the blanking force is to determine the unit blanking force per unit area. This takes into account the size and shape of the part as well as the material being used. To calculate the unit blanking force, the part dimensions are divided by the unit area of the die cavity. This will give a value, which can then be multiplied by the blanking force required for the material being used. This value can then be divided by the total area of the part to get the unit blanking force.
When deep drawing cylindrical parts, the unit blanking force must also take into account the additional forming forces associated with the reddening process. The reddening process is the additional step of forming the part by stretching it and reducing its thickness. This will result in more force being required to form the material and thus, the unit blanking force must be increased. The amount of additional forming force will vary from material to material, but should be taken into consideration when calculating the blanking force.
Finally, its important to understand that the amount of force required for deep drawing cylindrical parts will be different from other types of parts. The shape of the part is inherently more complex and the die cavity is typically very precise. This means that more force will be required to punch the material into the die and to create a precise shape. Additionally, the material used may also require additional force for deep drawing cylindrical parts. As such, its important to consider all of these factors when determining the unit blanking force for deep drawing cylindrical parts.
In conclusion, determining the unit blanking force for deep drawing cylindrical parts is not a simple task. There are a number of factors that must be taken into consideration, such as the material being used, the size and shape of the part, and the additional forming force associated with the reddening process. Additionally, the amount of blanking force required for the material used will vary depending on the complexity of the part. However, by taking all of these considerations into account, it is possible to calculate the correct blanking force to ensure a good quality part.
