Vistmac is one of the leading Press Brake Machines manufacturer in China, we offer different types press brake machine , like NC Torsion Bar Hydraulic Press Brake, CNC Hydraulic Press Brake , Servo CNC Press Brake, Full Electrical Press Brake, Amada Types Up Action Press Brake, Tandem Press Brake Machine, the Controller we have DELEM,Cyblec, Italy Esa utomotion and China ESTUN, the Pressure tones from 20Ton-6000Ton. Vistmac engineer also can design customized press brakes accord to customer special request.

NC Torsion Bar Press Brake

CNC Electric-Hydraulic Proportion Press Brake

Servo Hybrid CNC Press Brake

Faq

Q1.How to choose a press brake?

Before choosing your press brake, you must first know the type of metal you want to bend (stainless steel, 16 gauge mild steel, etc.)

Then you will need to determine the particular characteristics to be taken into account when calculating the part bend. This includes, for example:

*The tensile strength

*The thickness and length of the metal

*The press brake’s folding or bending length

*The width of the V

*The inner radius of the parts

Once these characteristics have been determined, you must then calculate the tonnage required for the bending operation.

The tonnage is the press force of the press brake. It determines the amount of pressure that can be applied by the punch during the bending operation.

*High tonnage allows thick and hard metals to be bent.

*Low tonnage is suitable for thin metals.

Other your budget also is important factor.

Warning: incorrect tonnage (too high or low) can damage your press brake or the part you are bending. To calculate the tonnage of your press brake, refer to the operating manual or a tonnage table.

Q2.What are the other selection criteria for a press brake?

What other criteria are important to consider when choosing a press brake?

*The back gauge

This is an adjustable gauge that stops the part by centering the bending line on the V-shaped opening of the die.

It allows the part to be bent to be in the right position.

*The angle control

It is used to compensate for any inaccuracies in the press brake.

Warning: the angle control is limited on some parts (if they are too small, parts with negative angles, etc.).

*Tools

Using hydraulic clamping allows for shorter tool change times, for example.

The clamping length also has an effect on the tool accuracy.

Be sure to respect the maximum press force to avoid damaging to the tools.

*Operator safety

When changing tools, make sure to stop the press brake motor or turn it to minimum.

Operators should never put their hands in the tool work surface.

They must also not wear loose or flowing clothing.

Lastly, operators must not work at the back of the machine.

Q3.Which technology should you choose for your press brake?

There are three types of technology for press brakes:

The hydraulic press brake

The punch moves by means of a system of hydraulic cylinders.

It allows high bending capacities (bending length up to 8 m, force up to 1,200 tonnes).

It operates continuously even if it is not bending, which generates electricity costs.

It requires significant maintenance regularly.

It’s stronger than an electric press brake.

It is also cheaper.

It is suitable for simple bending operations.

The electric press brake

It is equipped with servomotors instead of hydraulic cylinders.

It achieves greater productivity gains.

The servomotors only use energy when the machine is performing bending operations.

There is less maintenance.

The machine offers more flexibility.

It is more expensive than the hydraulic press brake, but operating costs are lower.

The hybrid press brake

It is a hydraulic press brake equipped with electric motors.

Having electric motors reduces the use of the hydraulic system.

It combines the advantages of electric and hydraulic press brakes.

Q4 How to choose the press brake machine toolings?

What Are You Making

This will come down to the type of metal you are using. Different thicknesses will need different tools as the die opening, angle and punch radius will change. You also need to factor in the length of the sheet metal you are working with to determine how much tooling you need.

Also the Tensile Strength and Yield Strength of the metals come into play greatly as ¼” Aluminum is much easier to bend then ¼” carbon steel. Carbon steel, Stainless Steels, Aluminum, and mild steel sheet metals all have a different bending force and may require tooling adjustments to bend them correctly.

Angle

The angle you are forming also has a lot to do with choosing the right tooling. If you need to use a press brake with the lower than recommended tonnage, you will need to match it with a toolset with an increased die opening that will lower the tonnage required to form your material. Although there are 3 types of bending on a press brake, Air bending will also give you a longer life to the press brake without compromising quality as long as you again, use the right tool set.

Top and Bottom

Top tools are called punches and work together to make each product they also work differently with different bottom tolls, or dies. Top tooling comes in a wide variety of shapes and sizes. The correct punch you need will depend on the job at hand. There is a large range available, but they can be generally classified into these unique types, Standard Punch, Goose Neck Punch, Swan Neck Punch, and Acute Angle Punch.

Bottom Tools

Dies are the bottom tools and they are also available in different sizes and shapes to match the punch tooling and material thickness you are forming. From single Vee designs, Offset Tools, Flattening Dies and U bend and Z bend variants. Which you choose will depend on your fabrication needs and the parameters of your Press Brake.

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