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Press brakes

Name of a product Inventory number Producer YOM Parameters  
LE 50/2500

LE 50/2500

201325 Gefi Györ 1981 Bending power: 50 t
Bending length: 2500 mm
Type of press drive: Hydraulický
CTO 80/2500

CTO 80/2500

241179 Espe 1997 Bending power: 80 t
Bending length: 2500 mm
Type of press drive: Hydraulický
Machine dimensions l x w x h: 2500 x 2385 x 1250 mm
Machine weight: 5 700 kg
CTO 160/3150

CTO 160/3150

231156 Stroje a zariadenia Piesok s.r.o. 1991 Bending power: 160 t
Bending length: 3150 mm
Type of press drive: Hydraulický
Main motor power: 11 kW
Machine dimensions l x w x h: 4000x1540x2960 mm
Machine weight: 11500 kg
VIMERCATI 100 x3050

VIMERCATI 100 x3050

231772 Vimercati 2007 Control system Cybelec:
Bending power: 100 t
Bending length: 3050 mm
Number of driven axes: 2
Lower compensation movement: NO
Type of press drive: Hydraulický
B M 100-3100

B M 100-3100

232004 Hämmerle 1997 Bending power: 100 t
Bending length: 3100 mm
Type of press drive: Hydraulický
Machine weight: 11500 kg
Main motor power: 15 kW
Equipment weight: 9 500 kg
CTO 80/2500

CTO 80/2500

221579 Stroje a zariadenia Piesok s.r.o. 1992 Bending power: 80 t
Bending length: 2500 mm
Type of press drive: Hydraulický
Table dimensions: 2500 x 160 mm
Machine dimensions l x w x h: 2500 x 2385 x 1250 mm
Machine weight: 6100 kg
CTO 80/3200

CTO 80/3200

201925 Espe 1986 Bending power: 80 t
Bending length: 3200 mm
Type of press drive: Hydraulický
Throat: 250 mm
Max. ram stroke: 150 mm
Clearance between columns: 2050 mm
CNC AP 3100/120

CNC AP 3100/120

231826 ERMAKSAN 2005 Control system Delem: DA - 65 R
Bending power: 120 t
Bending length: 3100 mm
Number of driven axes: 3
Lower compensation movement: YES
Type of press drive: Hydraulický
DEC 320/4000

DEC 320/4000

092690 Digep Bending power: 320 t
Bending length: 4000 mm
OPTIFLEX 320/3,1

OPTIFLEX 320/3,1

221767 Ursviken 2015 Control system Cybelec: DNC 15T-2D
Bending power: 320 t
Bending length: 3100 mm
Number of driven axes: 6
Lower compensation movement: YES
Type of press drive: Hydraulický
LE 100/3000

LE 100/3000

211319 Gefi Györ 1976 Bending power: 100 t
Bending length: 3000 mm
Type of press drive: Hydraulický
Main motor power: 17 kW
Machine dimensions l x w x h: 3000 x 1170 x 2410 mm
Machine weight: 7500 kg
SPEED-BEND 3150x175

SPEED-BEND 3150x175

231295 ERMAKSAN 2022 Control system Delem: DA - 66 T
Bending power: 175 t
Bending length: 3100 mm
Number of driven axes: 6
Lower compensation movement: YES
Type of press drive: Hydraulický
HFE M2 EVO 8025S

HFE M2 EVO 8025S

231582 AMADA 2017 Control system Amada:
Bending power: 80 t
Bending length: 2500 mm
Number of driven axes: 8
Lower compensation movement: YES
Type of press drive: hydraulic
Trumabend V 130

Trumabend V 130

231536 Trumpf 1999 Control system Delem: DA - 69 T
Bending power: 130 t
Bending length: 3060 mm
Number of driven axes: 5
Lower compensation movement: YES
Type of press drive: Hydraulický
AD-S-2060

AD-S-2060

231813 Durma Turkey 2022 Bending power: 60 t
Bending length: 2050 mm
Number of driven axes: 2
Lower compensation movement: YES
Type of press drive: Hydraulický
12

Forming machines used for processing (bending) of sheet metal. These machines are currently replaced by bending machines, because they are hydraulically driven and can work with greater pressures and lengths of bent parts.

During this kind of material processing , there is no waste and semi-finished products are used. It is also possible to bend very small workpieces of very small radius

Different types of punches and dies are used here as tools. These tools can be of different shapes and lengths. To clamp these tools mechanical or hydraulic clamping is used. Laser inspection can be used for maximum tool accuracy. Mechanical systems are used to drive the press, with an electric motor driving a system of pulleys and belts. Or a hydraulic one, which drives the hydraulic unit via an electric motor and the latter moves the ram through the pressure of the cylinders. 

The rear stop is very important for a press brake. It ensures the correct positioning of the workpiece in the machine. Semi finished product is pressed against the thumb, which is on the stop and ensures the correct position with respect to the tool. The rear stop is controlled by a CNC system and it moves to precise positions according to the program. Machine can operate in up to 6 axes. 

There are following axes:

X - along which the stop moves forward and backward

Z - along which the stop moves to the left or to right

R - along which the stop moves up and down

Another important function of press brakes is cambering. It is a process when the the long parts are bended the resistance of the material to the upper tool, elastic deformation of the part of the ram with the punch occurs. This can be prevented by underlying the matrix in the central part, grooves on the edges of the working table or automatic system.

Press brake control

Today, press brakes are controlled by a computer systems. Based on the entered values (material, tools, length, etc…)  calculates the production process, the movement of the stops or the bending force. Afterwards the machine can work in three following modes . 

  • Manual mode
  • Semi-automatic mode
  • Automatic mode

Types of press brakes

Press brakes are designed with different types of drivers such as machines with manual control, mechanical or hydraulic driver.  Each has its advantages and disadvantages. Furthermore, it is possible to divide press brakes according to their construction into segmental, tandem and combined.

Manufacturers of press brakes

Most popular manufacturers are TRUMPF, DURMA, SAFAN DARLEY, BYSTRONIC, GASPARINI, Haco, Beyeler, Promecam, Hämmerle. 

Currently, the most widely used and manufactured are hydraulic press brakes, which are CNC controlled.Top machines are from following manufacturers: Trumpf, Amada, Bystronic. These manufacturers use either their own CNC system for control or universal ones such as Delem, Cybelec, ESA..  These machines achieve a high level of automation of the operating cycles and therefore the maximum use of their capabilities. Of course press brakes from these top manufacturers are very expensive to purchase.