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Everything You Need to Know About: Press Brakes

As one of the more traditional methods for processing metal materials, the press brake, also commonly known as a brake press, has been around for over a hundred years. In fact, did you know the first brake was patented in 1882?

Known as the cornice brake, this nineteenth-century machine was made out of custom cast iron parts attached to finished pieces of oak and used a manually operated leaf that forced a clamped piece of sheet metal to be bent in a straight line - talk about some pressing labor! You can learn more about the origins of the press brake here.

Fast forward to today, and press brakes have evolved into highly-advanced machines powered with hydraulic systems and computer technology. These modern brakes efficiently bend sheet and plate metal with ease, supplying a variety of industries with simple and complex parts.

Press Brake Forming

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Press brakes work by using a punch and die that are set at predetermined angles to bend or cut metal into a variety of shapes and forms.

Check out the video above to see our 230-ton Cincinnati Proform brake in action!

The basic principle of brake forming relies on force, otherwise known as tonnage. This determines the total amount of pressure that can be applied by the punch during a bend. The higher tonnage, the thicker the materials that can be bent and vice versa. 

Along with the tonnage comes bending length, which is the maximum length of sheet metal that can be bent. For example, if you have a machine with a 14' bending length, any sheet metal larger than 14' will be too long for that machine to process. 

Depending on the application and material size/thickness, different machines with different tonnages and bending lengths are required for proper fabrication. In fact, these factors are important because they help determine the press brake's load limit - a limit calculated in tons per inch.

Knowing the load limit and press power of each machine is important because if the wrong tonnage or length is used it can damage or ruin the equipment. Check out this helpful article to learn more about press brake tonnage limits

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Types of Press Brakes

Modern press brakes are much safer and don’t require nearly as much effort as earlier models. In fact, modern brakes have increased the speed, quality, and efficiency of bending metals. When it comes these modern brakes, there are three common types: manual, hydraulic, and CNC.Manual Press Brake

1. Manual Press Brakes: also known as sheet metal brakes, these are the most common type of brakes. Manual brake presses require you to manually adjust the bending dimensions and angle at each cut, and are best used for the mass production of set bending sizes and angles.

Hydraulic Press Brake

2. Hydraulic Press Brakes these brake presses utilize two hydraulic cylinders, allowing more control and consistent strokes. They are often classified by their movement, up acting or down acting, with each style having its own distinct advantages. Learn more about their differences here!

CNC Press Brake

3. CNC Press Brakes: these types of brakes have the highest precision and customization abilities, utilizing computer technology to control accuracy and increase efficiency. When using CNC brake presses, data such as bending angle, plate thickness, width, and grade are entered into a controller by a trained operator and the brake easily handles the rest. Learn more about Boyd Metals' press brakes!

Why Use Press Brakes?

Boyd Metals Press Brake

When it comes to bending sheet and plate metals to precise lengths and angles, there is no other machine quite like the press brake. 

As one of the many important pieces of equipment in the metal industry, the press brake helps deliver custom parts to a wide range of industries including auto, aviation, agricultural, energy, military, transportation, and more! 

Though production needs and materials will determine the type of brake required for proper forming, a good metal service center will always help determine what machine is best suited for the job and offer a solution for bending needs. Having a good press brake on-hand is crucial to any metal fabricator's operations and success!

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Tags: Metal Industry and Product Knowledge