Wiper Die – What it is and When it’s Used
When you bend a tube, you run the risk of misshaping it. The radius flattens, ripples form before the bend, buckling occurs, etc. These imperfections don’t just ruin the appearance; they hamper performance and structural integrity.
Proper bending practices and quality material can ensure a solid bend, but sometimes, additional tools are needed to retain maximum strength and shape.
To prevent excess flattening, a mandrel is often used. A mandrel is an object placed inside the tube that holds inside radius while the tube is built.
Sometimes, though, a mandrel isn’t enough. That’s when you need a wiper die.
What is a Wiper Die?
A wiper die is a metal wedge-shaped tool used for precision tube bending. At first glance, a wiper die may look more like a doorstop or crude chisel, and while it might work for the former, it’s best utilized during the fabrication process.
The top side is contoured to match the curve of a tube. The narrow end of the die is inserted between the bend die and the tube itself, adding additional support along it.
What Does a Wiper Die Do?
Whereas a mandrel provides support inside of the tube, the die adds external support. A mandrel prevents a tube from flattening, but it might not be enough to stop buckling, ripples, and humps that can form at the end of a bend’s radius.
A wiper die covers the area where these occur, forcing the tube to hold its shape, properly distributing pressure from the bend and maintaining the tube’s smooth exterior.
When to Use a Wiper Die
The need for a wiper die depends on the job. The material being used, the pressure being applied, and even the speed/cost of manufacturing can factor into the need for a wiper die. It’s best to work with an experience fabricator to determine what is needed to meet your standards and your budget.
Sometimes a wipe die is needed. Sometimes it’s not.
At Ever-Roll, we have experience in tube bending for a vast range of industries. Whether you need a little consultation, or you’re ready to place an order, we’ve got you covered. Contact us today.
bent on perfection.
bent on perfection.
3988 Lawrenceville Dr.
Springfield, OH 45504
Phone: (937) 964-1302 (Office)