Sometimes, a person will be confused NC press brake and CNC press brake when trying to buy press brake. There are numerous differences between the two presses brake machines. We will present the main points of how to distinguish CNC press brake and NC press brake. We hope it can provide you with some guidance when you begin your business. We'll call the torsion bar type of press brake "NC Press brake" as in addition to the Electro-hydraulic kind of press brake "CNC Press brake".

Different

Structure

The design principle for both machines is different, it results in the different synchronous structures on both sides of the ram. To connect both the rams, NC press brake utilizes the torsion shaft. This forces the ram to move up or down in synchrony. NC press brake also utilizes the compulsive, synchronous method. The ram's parallelism can't therefore be inspected and modified by the machine. For the CNC Press brake, two linear encoders are installed on the machine both sides and the CNC controller will be able to assess the synchronous state on both sides of the ram by the feedback generated by both linear encoders. If there is some error, the controller can adjust the proportional valve, which will maintain the synchronization of the ram. CNC controller as well as the hydraulic system and linear encoders form part of the closed loop control system.

Accuracy

The ram parallelism will affect the precision of the workpiece. The NC Press brake synchronization is maintained mechanically, and has no time feedback to account for the error. What is more, it can not change itself and could result in low bending precision. The torsion bar forces both cylinders in synchronization both up and down in the NC press brake. The torsion bar will expand in the event that the partial load is in place for a long period. For CNC hydraulic press brake the controller will control the synchronization of the ram by the proportional valve as well as the linear encoder will send feedback on any error back to the controller, if there is some error the linear encoder will send the feedback and the controller will send the signal to the proportional valve in order to make the adjustment and ensure that the ram remains synchronized and increase the accuracy of bending.

Speed of work

We are talking about three speeds for the brake press including: down speed, working speed and return speed. For NC Press brake, it will us the cylinder 6:1 or 8:1; for CNC Press brake, it will use 13:1 or 15:1 cylinders, so CNC press brake is quicker than NC press brake. The NC press brake's ram's down speed is approximately 80 m/s. The backgauge moves at around 100 m/s. But for CNC Press brake, its down speed of the ram could be up to 200mm/s, and it will move very fluently at the point of change in speed. The backgauge speed can go up to 400 millimeters per second, which will boost efficiency.

Mechanic rigidity

Because of its design, NC press brake can not bend by partial load. The torsion bar is able to be able to deform when it is employed for a prolonged period of time. It will not happen when you use the CNC hydraulic press brake the Y1 and Y2 Axes will work independently and it can perform the work with only a small amount of load.

Crowning system

For most of NC press brake products, it is not equipped with crowning system as standard. Before bending the product, the operator must alter the angle by hand. It will take long time and waste material; it can also be challenging to create the product in a the most precise way.

Sometimes , the customer can decide to include a manual crowning system as an optional part of the press brake. But, due to the manual operating system, it isn't possible to compare it with the press brake that is CNC. Since on CNC Press brakes the crowning system is going to be controlled by the Controller , and it will adjust the crowning system based on the bending parameters. This will improve the operation effectiveness and accuracy.