A backgauge is used with a press brake to position workpieces for bending. It can be moved and positioned to create complex folds and is often used with a CNC system. The backgauge has multiple axes of motion and each is controlled by a different motor. The CNC system controls both the backgauge and press brake, allowing for accurate bends. The backgauge is positioned relative to the die to achieve the desired angle and can be repositioned for multiple bends.
A backgauge is a component that is often used with a press brake to properly position work pieces for bending. It can be moved and positioned to allow a press brake to create a variety of complex folds. This can be achieved as the relative positions of each component can result in a predictable bend position and angle. Backgauge are often used in conjunction with a computer numerical control (CNC) system that can automate the entire process. In some cases the backgauge is capable of moving along seven individual axes and each is controlled by a different motor.
Press brakes are devices that are used to place precise bends in workpieces such as sheet metal. The plate or sheet of material is placed on a mold and then pressed into it by mechanical, pneumatic or hydraulic force. Manual units require manual positioning of each piece. This can be accomplished with an expert eye or by relying on tooling, but CNC units can automate the whole process.
CNC systems use a variety of optical sensors, robotic components, and computer programming to position parts and operate press brakes and other machining devices. The CNC system typically controls both the backgauge and the press brake, and the operator only needs to slide the part into place. In other configurations a robotic arm can perform this function, which allows the operator to turn on the machine and then observe it if something goes wrong.
Each backgauge offers a different range of motion, which can impact ease of use and accuracy of turns. Some backgauge have seven or more axes of motion that the CNC system can control individually. Each axle typically has its own motor that allows the backgauge to slide back and forth in that particular direction. When all of these potential directions are combined, a CNC machine can position a backgauge with good accuracy.
The way a backgauge works is that it is positioned relative to the die so that the part contacts it. A CNC system can use this relative distance to calculate the location of a bend and combine it with die design and press life to achieve the desired angle. The backgauge can then be repositioned so that the same piece touches it differently and receives another bend. This process can facilitate the manufacture of multiple components that all have the same accurate set of bends.
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