The Basic Guide to Bending Machine

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Publish Date: August 12, 2022

What Is A Bending Machine?

A bending machine is a machine used for bending and forming workpieces.

There are many types and functions of bending machine, which can be used as a press or a bending machine

Some bending machines can directly process sheet metal without clamping tools.

And some bending machines need clamping tools to assist in bending.

The metal sheet is fixed by the clamping device and will not move during the whole processing process.

The bending machine uses the bending tool to process the metal plate and manufacture the profile.

Special materials shall be used for the machine body and tools of the bending machine.

This can ensure that the machine body and toolings are not damaged by pressure during processing.

Types of Bending Machine

There are many types of bending machines, including Pipe bending machine, Sheet metal bending machine, Sheet folding machine, Hydraulic bending machine, Mechanical bending machine, Electric servo bending machine, Electric pipe bending machine, Cutting and punching machine, etc.

Pipe bending machine

What Is A Pipe Bender

Pipe bender is a machine used for rolling and bending metal pipes and profiles.

The profile is a square or rectangular thick long metal.

Bending is a stretching process, and there will be friction between the toolings and the pipes.

In order to prolong the service life of the toolings and the pipe bender.

Drawing oil can be used to reduce the resistance between the pipe and the bending tools.

Pipe bending and manufacturing equipment are used to perform bending, swaging, flaring, and crimping operations.

Stainless steel, iron, copper, aluminum, titanium, and carbon steel can be bent by the pipe bender.

Metal materials have ductility and small elastic deformation, which can support the structure of the bending section.

The pipe processed by the pipe bender has a smooth curve, no collapse outside, and no fold inside.

The pipe is a hollow container, which is used for the transportation of gas, solid, and fluid in industrial, medical, and other equipment.

The pipe bender is mainly used for laying pipes in buildings, highways, railways, bridges, etc.

Structure of Pipe Bending Machine

The pipe bending machine is composed of the clamp die, bend die, pressure die, wiper die, and mandrel.

The die of the pipe bender is generally made of hardened steel to prevent damage.

However, molds such as scrape molds are made of aluminum or brass to prevent damage to the pipes.

Bend die

Bending die is an important part of the rotary drawing process, also called radius die.

Because the bending die determines the inner radius of the pipe, and it is round.

The bending die holds the pipe and bends it during the drawing process.

Clamp Die

The clamp die is used to assist the bend die to press the pipe onto the bend die.

The clamp die can prevent the pipe from sliding when the bending die rotates.

Wiper die

The function of the wiper die is to prevent the inner radius of the pipe from being folded and the outer surface from being damaged.

After the processing of the bending die, the pipe will be plastically deformed and may be wrinkled.

In terms of that reason, the wiper die is used to smooth the pipe surface.

To prevent damage to the pipe, the wiper die is made of a softer alloy, such as aluminum or brass.

Pressure die

The pressure die is used to apply pressure to the pipe to ensure the curved profile of the pipe.


Mandrels are used to support the bending of small radii, thin tubes, and hard materials.

When these pipes are bent, they are prone to wrinkle inside and collapse outside.

This can be prevented by the mandrel working with the wiper die.

How Does A Pipe Bending Machine Work?

When bending the pipe, it is necessary to push the pipe into the pipe bending machine through pressure.

The driving force of the pipe bending machine can be hydraulic drive, electric servo, pneumatic or manual.

The clamping block and the forming tools clamp the pipe in place and adjust it to the die shape.

After the pipe is clamped, it is fixed in place when its end rotates and rolls around the die.

There are also some processing methods, such as bending pipes to form profiles through rollers.

When the pipe is bent, the mandrel is placed inside the pipe to prevent the inside of the workpiece from folding and collapsing.

The scraping die of the pipe bender can maintain the tension of the pipe and avoid damage when force is applied to the pipe.

The wiper die is generally made of aluminum or brass to prevent scratching the raw material.

Bending methods of pipe bending machines include press bending, rotary draw bending, compression bending, roll bending, mandrel tube bending, wiper die bending, heat induction bending, sand packing and hot slab forming, and ram bending.

Metal Sheet Bending Machine

A sheet metal bending machine is used to process sheet metal into profiles.

The metal sheet is first placed on the lower die of the workbench.

Then the punches are pressed into the lower die to complete a bending stroke.

The power system drives the slider to move, and the slider drives the punch to move downward.

The folding machine can bend metal sheets or pipes at any angle.

The machine specialized in bending pipes is a pipe bending machine.

The folding machine is suitable for processing some large workpieces that are difficult to be processed by other machines.

The power system drives the clamping shaft to fix the workpiece to a specific position.

After the workpiece is fixed, the folding arm of the swing beam will be driven in an arc to bend the flange to the required angle.

Plate Rolling Machine

Pyramid type mechanical plate bending machine is used for metal plate bending and forming.

Its bottom is driven by motor and gear and can roll.

The upper roller has the required bending radius manually adjusted up and down.

The steel plate bending machine has a double-sided pre-clamping device.

Its unique structure allows the two bottom rollers to clamp the workpiece in advance.

The upper roller is a roller fixed and pre-clamped by two lower rollers through hydraulic cylinders.

Press Brake

Press brake is a kind of bending machine used for bending metal plates.

There are many kinds of press brakes with different power systems.

At least three shafts on the rear gauge of the press brake.

Therefore, the accuracy, speed, and stroke of the press brake are controllable.

The press brake is easy to operate and is capable of processing workpieces in batches.


There are many kinds of bending machines, including pipe bending machines, metal plate bending machines and plate rolling machines.

Each kind of bending machine has certain advantages and disadvantages, and you can choose the appropriate machine according to the production needs.

The bending machine can be selected according to the required production process, output, budget and other factors.

Our company provides a full range of metal processing solutions, including shearing machine, laser cutting machines, press brakes, slotting machines, etc.

You can contact us, and our sales will recommend the most appropriate metal processing solutions for you.

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