Roll Forming Line Automation, Part 2: Blade Cut Dies

In the last blog post, we covered the various types and purposes of pre-notch dies. In addition to pre-notch dies, cut-off dies are integral components of your production line. Although there are many variations, there are really only two basic types of cut-off dies used. The blade cut die and the slugless crop-off die are the two main options. This post will delve into the workings of the blade cut die.

Tube Mill Cutoff Die

Blade Cut Dies

The blade cut die is the most common and basic die design. The blade cut design is effective for everything from closed shapes (tubing) to heavy gauge structural shapes.

The making of replaceable inserts and blades to fit in a common die set is relatively inexpensive.

Another advantage of the blade cut design is the ease with which punching or forming can be combined with it in the same die set, and the ease with which it can be coordinated with pre-punching operations.

With the present-day requirements for higher line speeds and less maintenance downtime, we have to take a good second look at the capabilities of the blade cut design.

Maintenance with a blade cut die is relatively high because of the blade itself. The problems caused by blade gaulling can hurt the appearance of the cut. A simple blade replacement can often shut down an expensive production line.

The blade cut die is very versatile and should be used, but not all the time and certainly not until all requirements have been carefully weighed.

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