Here’s how you can avoid the most common deep drawn problems

Here’s how you can avoid the most common deep drawn problems

When people see a deep drawn finished product, they tend to think that it looks so simple and that it did not take too much time to make it look that way, but they could not have been any more wrong. The deep drawing process is much more complex than it seems and numerous problems may occur while deep drawn cases and other such products are manufactured. Here are some examples of the most common deep drawn problems and how they can be avoided.

 

Wrinkles (mostly on the top edge)

One very common problem that may occur during the deep drawing manufacturing process is related to wrinkles and it mostly has to do with the blank holder. It may happen for the holder to be unbalanced or too tight which causes the metal to not flow accordingly, thus making wrinkles appear on the top edge. This also happens when the blank presents a burr along the holding edge. It is recommended to check these aspects from the very beginning in order to avoid such problems.

Metal fracture

Another very popular problem in deep drawing is related to metal fracture and there are several causes that can lead to this to happen and one very good example is the clearance between the die and the punch. In case this clearance is too large, too small or is uneven, chances for the metal product to be fractured or cracked during the deep drawing process are quite high, which is why you should check the clearance before the process starts.

Fractures or cracks at the bottom of the cup

The condition of the blank holder and the blank are extremely important in this process because it may happen for fractures to occur at the bottom of the cup. You need to ensure the surface is neither galled, nor nicked, because otherwise, the flow of metal into the die is significantly reduced and the finished product will not meet the specific requirements.

Upper rim is uneven

It is essential that the top rim is concentric and even in order for deep drawn parts to have the desired shape and size. If it happens for this rim to be uneven, it usually results in punch die alignment of poor quality, not to mention that the die draws higher amount of material, which implicitly prevents an even upper rim to be formed.

Excess material

Last but not least, excess material is another very popular problem experts may deal with during the deep drawn manufacturing process. There are two main situations in which this may occur: either the die clearance is smaller than usual, or the material is thicker than it is supposed to be. Regardless the condition, the result is the same: excess material at the top.

All things considered, these are some of the most common deep drawn issues that can occur during the manufacturing process. In case you need the services of a deep drawn company, it is advisable you do some quick online research and select the best one in the industry to benefit from desired results.

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