Perfect bends, no matter the material
Sheet metal is never entirely predictable. Its characteristics can vary for several reasons:
- variations in the casting process
- dimensional tolerances
- residual stresses caused by cutting
- the presence of holes or machining marks
- temperature and storage conditions
These variables influence the material’s behavior during bending. To achieve a consistent angle along the entire bend, the press brake must be able to automatically compensate for deformations in its own structure.
A matter of hundredths
During bending, the upper beam of the press brake always tends to flex upward in the central area. At that point, the distance between the punch and the die increases.
The crowning system is designed to compensate for this deformation by raising the die in the lower beam to maintain a constant distance between the tools.
If the compensation is incorrect:
- the angle will be more open at the center of the bend
- the angle will be more closed at the ends
Relying solely on theoretical material values often means wasting time on trials and corrections. The most effective solution is to measure what actually happens during bending and compensate for the deflection in real time.
Patented system
The Gasparini adaptive hybrid crowning system, patented on January 14, 2026, is based on two precision sensors that continuously monitor the deformation of the crossbar during bending. Operation is simple and straightforward:
- the first sensor detects the deformation of the upper crossbar
- the CNC compares the data with the second sensor
- the crowning cylinders automatically adjust the position of the lower crossbar
In this way, the two crossbars remain perfectly parallel. The result is:
- total control of the bend angle
- high precision
- absolute repeatability
- consistent performance with any material
There is no need to set values manually: the press brake detects everything directly from its sensors and automatically adapts even when the material changes from one part to another.
Hybrid technology: greater efficiency, lower energy consumption
Gasparini’s new adaptive hybrid crowning system represents a major advancement in hydraulic technology. The system eliminates proportional valves for energy distribution and regulation, replacing them with a more efficient solution based on:
- a variable-speed brushless motor
- a reversible pump
- direct power supply to the crowning cylinders
The motor dynamically modulates its speed to generate the oil flow necessary to quickly compensate for the deflection of the crossbeam. The flow between the pump and the cylinders is bidirectional, and pressure regulation occurs in real time, with no downtime.
The main advantages
Adaptive hybrid buckling offers numerous operational benefits:
Greater energy efficiency – By eliminating losses caused by proportional valves.
Lower power consumption – The system uses energy only when necessary.
Superior reliability – Fewer hydraulic components reduce potential points of failure.
Less maintenance and fewer unexpected issues – A simpler circuit means greater long-term stability.
Reduced installed power – The system operates only during deflection compensation.
Slower hydraulic oil degradation – Thanks to the reduction of unnecessary overpressures. Adaptive hybrid camber control offers numerous operational benefits:
Greater energy efficiency – By eliminating leaks generated by proportional valves.
Lower power consumption – The system uses energy only when necessary.
Superior reliability – Fewer hydraulic components reduce potential failure points.
Less maintenance and fewer unexpected issues – A simpler circuit means greater long-term stability.
Reduced installed power – The system operates only during deflection compensation.
Slower hydraulic oil degradation – Thanks to the reduction of unnecessary overpressures.
