{"id":6175,"date":"2026-01-09T08:47:37","date_gmt":"2026-01-09T00:47:37","guid":{"rendered":"https:\/\/miharmle-cnc.com\/?p=6175"},"modified":"2026-01-09T08:47:37","modified_gmt":"2026-01-09T00:47:37","slug":"comment-calculer-le-tonnage-de-travail-dune-presse-plieuse","status":"publish","type":"post","link":"https:\/\/miharmle-cnc.com\/fr\/blog\/how-to-calculate-press-brake-working-tonnage\/","title":{"rendered":"Comment calculer le tonnage de travail d'une presse plieuse ?"},"content":{"rendered":"

When working with press brakes, working tonnage is of keen importance. It is the force required to exert pressure on the metal sheet for bending operations to get the desired shapes and angles.\u00a0<\/span><\/p>\n

With different types of metals, thicknesses, bending lengths, and other factors that affect tonnage, the value can vary. So, after a thorough evaluation and detailed calculation with a formula, you can get the right value for specific requirements.\u00a0<\/span><\/p>\n

Calculating the correct tonnage is vital. It ensures that the press brake operates safely and efficiently, producing accurate bending results. But when you neglect certain factors, you get substantial errors that may even damage the tooling and the machine.<\/span><\/p>\n

So, how do you calculate it? What is the formula, and what factors impact the tonnage calculation? In this article, we will cover all this information in detail. This knowledge will help machine operators and engineers to achieve the right tonnages for various small and large bending tasks.\u00a0<\/span><\/p>\n

Main Factors Affecting Tonnage<\/b><\/h2>\n

Material thickness<\/b><\/h3>\n

Increased thickness implies increased resistance to bending. This means that more bending force will be required for thicker metals.\u00a0<\/span><\/p>\n

For example, there are two metal sheets of the same material with varying thicknesses. One with a 1\/2-inch thickness and the other with a 1\/8-inch thickness. Here, the 1\/2-inch sheet with higher thickness will require a higher bending force than the 1\/8-inch sheet with lower thickness.<\/span><\/p>\n

Bend length<\/b><\/h3>\n

Then we have bend length. When the press brake exerts pressure on the sheet metal, the force is divided across the entire area. So, there is an increase in length, and you will need more tonnage.\u00a0<\/span><\/p>\n

Take an example of two metal sheets with lengths of 1 meter and 2 meters, respectively. The 2-meter sheet will need higher tonnage, while the 1-meter sheet will require low tonnage.\u00a0<\/span><\/p>\n

Lower die V-opening width<\/b><\/h3>\n

A lower die opening accommodates material when punched; it must be specified, considering the material thickness. If it isn\u2019t, the bending accuracy is compromised. The press brake will need more force to exert pressure. With a broader die opening, the material will be accommodated easily. So, it is recommended that the size of the v-opening be selected up to 9-10 times the material thickness.<\/span><\/p>\n

Material type and tensile strength (\u03c3b)<\/b><\/h3>\n

The tensile strength of different material types varies. This means tonnage for different materials will also be different. It typically refers to the pulling or stretching stress a material can withstand before deforming. Make sure you have the correct value for the material you are working with.<\/span><\/p>\n

Bending method<\/b><\/h3>\n

The choice of bending method not only impacts the tonnage requirement but also impacts the final bending results. So, there are three most commonly used methods:<\/span><\/p>\n