CNC Press Brake

There are different types of press brake ,for example manual press brake ,hydraulic press brake and cnc press brake.

Now the popular press brake is CNC Press Brakes,which also called Electric -Hydraulic Servo Press Brake.

The Servo System and linear scale cn promise the accuracy of the machine working.

The CNC Control System can set bending parameters to make sure the accuracy of the bending program.

The machine body is consist of C-shape frames,Workbench ,Ram.The plungersection is a crossbeam with a upper punch

and worktable with an bottom die.The back gauge aims to provide precise positioning functionality.

Press Brake Frame

The main structure that supports the entire machine.

It is usually a a high strength fully welded C-shaped structure,and composed of vertical plates on both left and right,bed and connecting structures.

The depth of  frame is equivalent to throat depth,which offers much bending space.

There are also monitoring tools on the frame,which can detect springback and keep it to a minimum.

Press Brake Ram

The ram during the process of opening die is a die component which can slide vertically or form a certain angle responding to the 

opening die direction.

It drives top punch to do reciprocating linear movement relative to the bottom die to achieve bending sheet metal,thus a specific bending angle

or arc be formed.

The slide is a driving mechanism component which can apply pressure to the press brake.

The ram is made of steel plate.It can be connected with oil cylinder through piston rod,driven by synchronized hydraulic cylinders on both sides.

The linear scale on both sides of ram make sure the precise positioning for synchronous movement.

With the help of oil cylinder and mechanical stopper ,the ram can avoid crowing.

It works with oil cylinder ,mechanical stopper and fine adjustment structrue to compose ram parts.Via hydraulic pressure,it drives the piston to move up and down.

The mechanical stopper is controlled and adjusted by the numerical control system.

Workbench of Press Brake

The workbench is the foundation of the press brake.The tool holder for the bottom dies is installed on the workbench.

Workbench is one the three components in press brake.

On the working table ,the most important is punch and die.

Punches and Dies

It has these types: V-dies, Rotary bending dies, 90 degree dies, Acute angle (air-bending) dies, Gooseneck (return-flanging) dies, Offset dies, Hemming dies, Seaming dies, Radius dies, Beading dies, Curling dies, U-bend dies, Corrugating dies.

The tooling of the press brake is divided into top tooling(Punch) and low tooling(Die).

Punch and die is applied for stamping formation and separation of sheet metal,which makes the workpiece into specific shaped and sizes.

The die is depended on bending method,bending angle ,raw materail and materical thickness.

During bending ,the raw drives the top punch to press into the bottom die.

Backgauge

 Backgauge locates on the rear of the press brake ,and locate precisely position of the workpiece before bending.

It is driven by differnt motors and moves on different axes.

The ball screw and timing belt ensure the synchronous movement of the back gauge.

The back gauge is controlled by CNC controller and can move on 6 differnet axes.

The R-axis indicates upward and downward movement.

The X-axis represents forward and backward movement.

The Z-axis indicates left and right movement.

Tool clamps

Press brake clampe is used for fixing mould.It has upper clamps and low clamps on the workbench.

During the clamping process ,the upper clamps can auto align the center.

Clampes are also divided into mechanical clamps and fast clamps.

Fast clamp is an quick changing device for top punch on the press brake.

It contains a fixture base and a front pressure plate device ,which can adjust the die,prevent ram damage and ensure the machining accuracy

of the workpiece stably.

Hydraulic System

Hydraulic system is used to control the hydraulic cylinder's pressure and flow rate.

It mainly consists of motor ,oil pump ,oil filling valve and oil cylinder,whcih are mounted on the press brake's frame,and

there is an oil cylinder on each of the left and right vertical plates.

The hydraulic pump converts mechanical energy into hydraulic pressure energy to drive the hydraulic system.

The hydraulic cylinder converts the liquid pressure into kinetic energy to drive the ram.

Control System

The controller is the brain of press brake machine.It receives input command in the form of text,numbers,symbols and graphics .

The controller can control the bending process through programming.

Currently the most common controller brands are Delem ,ESA,Cyblec,etc.

There are two versions of controller.One is button controller ,one is touch screen.Touch screen can provide 2D and 3D graphics programming

to simulate the bending process.

Safety Devices

The press brake has a lot of safety method.Such as protective covers,emergency stop buttons.

And the safety doors on both sides of press brake.When the safety doors are closed ,the dangerous area on both sides is inaccessible.

When they are opened during operation ,all axes will top moving,

More advanced protection devices include light curtain safety devices and laser protection devices.

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