pipe bending

Things to keep in mind Before the Pipe Bending process

Not Art and Science serve alone; Patience must in work be shown. 

Well said. As an Australian machinery manufacturing owner, the first thing that comes into my mind after reading this is the Pipe Bending process. In my experience, bending pipes and tubes contain both science and arts. And with a bit of patience, you can get good quality results. 

At the start, we went through a lot of trial and error, but ultimately, we succeeded. And it was necessary also because now my team and I know the preeminent things you should keep in your mind before the pipe bending process.

I am mentioning some knowledgeable points that will help you and your team command pipe and tube bending skills.


Pipe Bending

Consider these essential points before bending tubes and pipes. 

Choose the angle for pipe bending wisely.

Generally, when you bend a tube or pipe to a certain degree, it will try to come back to its original shape and will get success with 3 to 4 degrees. Let’s say if you bend a pipe at 60 degrees, it will rebound a few degrees less than 60 degrees in some time. So, to get a perfect bend of 60 degrees, bend the pipe at 63 degrees. In this way, you will get a robust and elite desired angle of 60 degrees. 

Use mandrel to avert flat toned bend.

Do you know about Flat toned Bend? A Flat toned bend contains a thinner tube wall, and the radius of the curve becomes tighter. The reason behind this bend is the outside wall of the pipe which is not thick enough to support itself in the bending process and ends up with collapses. 

Ball and Plug mandrel can help you with a flat toned bend. You can put this inside the pipe and allow the tube during the bending process. Simple plug mandrels or segmented ball type mandrels can be used. 

Use wiper dies to avert buckling and wrinkling. 

Generally, as a manufacturer, we all face thin walls and minor bend radii issues while bending pipes and tubes. I have a solution for this problem. Try wiper die to prevent buckling and wrinkling in turning. You just need to place the wiper die in the back of the bend die using its tip at the tangent point. When the wiper dies encountering the friction force during the bending process, it gets operationally compatible with tubing material. This is how the use of wiper die material can lead to pleasing after unnumbered bending cycles. 

Apply sufficient clamping pressure

Immense pressure in the pipe bending process plays an important role. Specifically, the tube can slip in the clamp die in an old set of tools if you put little pressure. As a result, you can get unpleasant deformations like kinks and wrinkles inside of the bend and will get a useless workpiece. Therefore, it is essential to put much pressure on pipe bending tools to prevent wrinkles.  

pipe bending

Delahenty Machinery: Bend your tubes and pipes with our best tools

We understand the need for robust and seamless machinery. That is why we offer you.

  • Solid Wiper Dies
  • Tip Style Wiper Dies
  • Mandrel Links and Balls
  • MACKMA and YLM pipe bending machines

Check our website and contact us for more details. 

powerful bending machine

Four mistakes to avoid when buying Tube Bending Machine

Buying a tube bending machine was an arduous task for a manufacturing industry owner earlier. Nowadays, you can quickly get these bending equipment at various designs and prices. But because of ignorance to cost saving for other unidentified reasons, entrepreneurs generally make the wrong decision while buying tube bending machines. 

Ideally, if you are an entrepreneur, you should know that the right tube bending machines are essential for good quality bends. A small mistake may lead to lousy quality bends, which endanger the application that uses them. And most importantly, these mistakes can end up in a bad reputation for your company. Here we introduce you to some other common mistakes that you should avoid while using a tube bending machine

Tube Bending Machine

Four things to keep in mind before buying Tube Bending Machine

A powerful bending machine is a priority.

Monetary investment is one of the essential considerations when buying a tube bending machine. Yet, it would help if you focused more on the quality and seamlessness of machinery than the price you need to pay. Specifications of the tube, Precision required, Rigidity or softness of tubes and Usage interval of the machine are essential things you should care about more than the cost of machinery

Check machinery features

There are so many machines available of various brands. But they may have different features. Here you need to understand their characteristics and seamlessness before selecting tube bending machinery. Firstly, analyze multiple risks and challenges you can face while using these machineries. Then it would be best if you opted for it. 

Use a bending machine till suggested capacity.

There are so many grades of steel that have different tolerance capacities. So, It is advised not to use the tube bending machine to its maximum. Otherwise, It can lend you with so many problems with machinery. Delahanty machinery advises you to buy a tube bending machine that offers 10 to 20 per cent leeway.

Choose machinery as per bending.

You can get manual pipe bending machines at affordable prices. But if you are buying it to save money, then it will bring bad results. You need to check the bending volume and then decide whether you should take manual tube bending machines or automatic tube bending machines. 

YLM All electric L&R smart turn tube bender CNC20MS-RLP-AE-7A

Buy robust tube bending machines on Delahanty Machinery

It has been more than 55 years since Delahanty Machinery is offering good quality tube bending machines. You can buy any tube bender machine at affordable prices, from full-electric tube benders to semi-auto tube benders. Contact us for more details. 

tube bending

Everything you need to know about Tube Bending

What is Tube Bending?

Tube bending machine helps you in bending tubes permanently. It is one of the fabrication methods to bend pipes. After bending a tube, you can use this in many instruments like trombones, railings, stairs, handles, furniture frames, automotive parts, air conditioning equipment, etc. 

The start of a bending operation is permanently fixed at two points, and then a rotating die, roller, or press enforces the bend. The outcome of tube bending is dependent upon many factors like tubing material, tooling, lubrication, the amount of pressure applied, and the bending geometry.

Tube Bending

How it works

To control mechanical parts and hydraulic systems, a tube bending machine works with a computer. A tube bending machine can assist you with constant bending and precise dimensions. Indeed, it eliminates confusion surrounding bending techniques. 

Five main elements play a vital role in clean and precise bending

  • A bend die is a round part that controls the radius of the bend. 
  • Clamp die helps the bend diet in gripping the tube.
  • The wiper die prevents wrinkles on the inside of the bend. 
  • Interlock mandrel works with wiper die to avert wrinkles on the inside of the bend. 
  • The pressure die applies the appropriate pressure needed to the tube to bend it correctly.

To get the perfect bend, all these parts work together with the computer’s specs. 


Types of Tube Bending Machine 

There can be two types of tube bending techniques, form-bound and free form bending. Form-bound bending is dependent on the geometry of the die, like press bending and rotary draw bending. And Freeform bending is contingent on the movement of the tube through the tooling like roll bending. 

Cold tube bending and Hot tube bending are the main tube bending techniques. Here are the standard cold tube bending techniques:

Press Bending

How Press Bending works

  • It is the oldest industrial tube bending technique. 
  • In this procedure, the tube is fixed at two points. 
  • After that, the bend die is forced against the tube to match the shape of the bend. 
  • The external dimensions of the cylindrical ram give the attribute of the bend to be imported to the tube. 

Pros of Press Bending

  • Press bending is a quick bending method. 
  • It does not need lubrication and cleaning. 

Cons of Press Bending

  • With the use of press bending, it is hard to make a minor degree of bend. 
  •  It is prone to confrontation in the internal and external curvatures.
  • You will face difficulty in controlling this method
  • It often builds an oval cross-section. But it depends upon the tube‘s wall thickness. 
  • When a consistent cross-section is not required, you can use this method for tube bending. 

Rotary Draw Bending

How Rotary Draw Bending works

  • Firstly, the bend die decides the radius of the bend. By rotating its outline, it imparts the bend to the tube. 
  • Clamp die grips the tube from the outside diameter and clamps it to the bend die.
  • The wiper die helps to prevent wrinkles of the radius from inside. 
  • A pressure diet provides an appropriate amount of force to bend the tube and maintains constant pressure at tangency. 
  • Mandrel helps in tube bending to prevent collapse, wrinkle and ovalisation. 

Pros of Rotary Draw Bending

  • Create exact bends, constant diameter with minimal ovalisation
  • Best for cross-sectional shapes like square, oval etc.

Cons of Rotary Draw Bending

  • This method is only for tube bending. That is why less flexible
  • It needs tooling for each different tube. 

You can use this method in pipe fittings, instrument tubing, handrails, automotive and aerospace parts.

Tube Bending

Compression Bending

How Compression Bending works

  • Firstly, a pressure bar pressed a tube against the fixed form block. 
  • Now, the wipe show is pressed and drawn against the radius of the block. 
  • At the end, it gives an oval cross-section in the bent area. 

Pros of Compression Bending

  • It is more cost-savvy than rotary draw bending. Because it has a simple set-up. 
  • This process is perfect for circular hollow sections. 

Cons of Compression Bending

  • You can not use a mandrel to support the inner diameter. 
  • You can not use this process in bending tubes to a small CLR. 

This method is mainly used in bending symmetrical workpieces and electrical conduits for structural application.

Roll Bending

How Roll Bending Works

  • It contains two stationary rotating rollers and a moving roller. 
  • The static rollers rotate in the counter direction of the moving roller. 
  • The bend radius is gradually formed as the tube moves back and forth on the rotating rollers.

Pros of Roll Bending

  • You can use this machinery in creating bends with large CLR.
  • It can integrate secondary operations like punching and notching in-line.
  • Roll bending can form complicated shapes. 

Cons of Roll Bending

  • It does not fit well to small quantity production runs. 

With this method, you can work on structural applications, powder transfer systems, and much more. 

Benefits of Tube Bending Machine

Tube bending machines can help you with perfect tube bending in so many ways. It is a fully automated machinery that requires less human effort. When it comes to bending the tube perfectly, it is more precise and reliable. Every time whenever it needs, it is capable of enlisting the proper tooling techniques. At affordable prices, it can benefit your manufacturing business in an exemplary manner.

Tube Bending

Delahenty Machinery- Robust Machinery Solution

Delahenty Machinery has been serving powerful machinery in the manufacturing industry in Australia since 1964. We specialise in tube manipulation and cutting machinery for a wide range of sectors, including defence, shipbuilding, furniture, caravan, construction, playground, automotive, HVAC, truck, tram and bus. 

Select your machinery and contact us for more details.