Sheet Metal Bending Brakes
Metal Brake is a metalworking machine that allows the bending of sheet metal. A cornice bending brake only allows for simple bends and creases, while a box-and-pan brake also allows one to form box and pan shapes. It is also known as a bending machine or bending brake or a sheet metal folder or just a folder. It included mechanical folder, electrical folder and hydraulic folder.
The metal brake consists of a flat surface onto which the material is placed, and a clamping bar which will come down and hold the material firmly during the sheet bending procession . This clamping action may be manual, automatic or operated using a foot pedal. The front, gate-like, plate of the machine is hinged and may be lifted, forcing the material extended over a straight edge to bend to follow the plate.
The bends can be to any angle up to a practical limit of about 120 degrees, somewhat more in the case of a bar folder. If the area to be bent is narrow enough, a sharper bending can be made by inserting the bend under the clamping bar and lowering it.
Box-and-pan brake
In a box-and-pan brake, the clamping bar includes several removable blocks, which may be removed and rearranged to permit bending of restricted areas of a piece of sheet metal or of already partially formed pieces.
After bending, a box or pan form is then completed by screw, solder, weld, rivet, or other metal fixing process.
Bar folder
This is a simplified brake, usually much smaller than cornice or box-and-pan brakes. Typically, a single handle both clamps the workpiece and makes the bend, in a single motion, but the depth is usually much less than what a cornice or box-and-pan brake can handle.
Sheet Metal Press brake
This is a more complex tool that forms predetermined bends by clamping the workpiece between a matching top punch and lower die, also called metal bending machines, from traditional NC torsion bar sheet bending machines with mechanical synchro device for Y1&Y2 to full electro servo synchro pressbrakes with Y1&Y2 auto controlled by different brands CNC pressbrake controller, some metal pressbrakes manufactures still offering mechanical type pressbrakes for simple sheet metal bending requirements.
