CNC press brake means that this machine is controlled by computer.you can programme some orders to its action.this has a big use in the bending sheet metal,because you usually need to bend several pattern with different size.it is not possible for press brake operator to decide back gauge size each time,here,you need a CNC press brake machine.it has a record of your bending. then,it can bend the metal with repeating process.of course, we can say that CNC is one part of automation and it should have different level.yes, you are tight. CNC press brake has 2 axis,4 axis and 6 axis. the degree of automation will increase according to axis quantity.in most situation, 2 axis CNC is enough for most people.