The Challenge of Bending Stainless Steel Tubing

Stainless steel tubing is a popular material in various industries, including aerospace.  However, bending stainless steel tubing without kinking can be a daunting task, even for experienced fabricators.

Why Does Stainless Steel Tubing Kink?

Kinking occurs when the tubing is bent beyond its elastic limit, causing the material to deform and form a sharp crease.

• Insufficient support during the bending process
• Using the wrong bending technique or tooling
• Inadequate material preparation
• Exceeding the tubing’s maximum bend radius

The Importance of Tube Bending Machines

To achieve precise and consistent bends without kinking, a tube bending machine is an essential tool.  A good tube bending machine can help you:

• Achieve precise bend angles and radii
• Reduce material waste and scrap
• Increase production efficiency and reduce labor costs
• Improve the overall quality of your bends

Preparation is Key

Before bending stainless steel tubing, it’s crucial to prepare the material properly. Here are some tips to ensure a successful bend:

• Clean and deburr the tubing: Remove any dirt, oil, or debris that may interfere with the bending process. Deburr the ends to prevent scratching or galling.
• Select the right tubing size and material: Choose the correct tubing size and material for your application.
• Use the correct bending parameters: Consult the tube bending machine’s manual or manufacturer’s guidelines to determine the optimal bending parameters, including bend speed, pressure, and angle.

Tube Bending Techniques

There are several tube bending techniques to choose from, depending on the type of bend required:

• Compression bending: This method uses a die to compress the tubing, creating a smooth, consistent bend.
• Rotary draw bending: This technique uses a rotating die to bend the tubing, ideal for tight radius bends.
• Mandrel bending: This method uses a mandrel to support the tubing during bending, preventing kinking and ensuring a smooth bend.

Tips for Bending Stainless Steel Tubing without Kinking

Here are some additional tips to help you achieve a successful bend:

• Use a high-quality tube bending machine: reliable machine that can handle the demands of bending stainless steel tubing.
• Monitor the bending process: Keep a close eye on the bending process to detect any signs of kinking or material deformation.
• Use the correct lubrication: Apply a lubricant to the tubing and bending die to reduce friction and prevent galling.
• Test and inspect the bend: Verify the bend angle and radius, and inspect the tubing for any signs of kinking or damage.

Conclusion

Bending stainless steel tubing without kinking requires a combination of proper material preparation, correct bending techniques, and the right tube bending machine.