Discover how KRRASS’s Stamping Press technology can help you optimize your production

More productive sheet metal machines, new customized solutions, and easy-to-use option suites are designed to meet the customer’s real needs.

KRRASS TAILORED-MADE Stamping Press

The industry-standard workhorse for industrial stampers, These stamping presses are designed to incorporate a variety of stamping automation solutions, provide flexibility for enhanced performance and integrate with KRRASS Press System’s suite of machine monitoring software. Our customers spoke, and we listened.

MB8 Series press brakes, designed with high technology to increase efficiency on precise part bending. With Easy to use control unit, stabile body structure, perfect design, low operating cost, different tool usage options, maximum safety standards, KRRASS press brake is the best in the world in its segment.

Bending performance is increased by using high quality European clamping system and easiness to use. KRRASS is your solution partner with various tool options.

MB8 Series press brakes, designed with high technology to increase efficiency on precise part bending. With Easy to use control unit, stabile body structure, perfect design, low operating cost, different tool usage options, maximum safety standards, KRRASS press brake is the best in the world in its segment.

Bending performance is increased by using high quality European clamping system and easiness to use. KRRASS is your solution partner with various tool options.

Thanks to our hybrid or inverter-driven bending machines you get various benefits: lower consumption, less oil and pump stressreduced noise and greater speed and flexibility.

KRRASS sheet metal bending machines allow you to bend better, faster and consume less.

KRRASS Hybird Single Crank Press

The industry-standard workhorse for industrial stampers, the JH21 series of single crank stamping press machines were reengineered for the digital shop floor. These stamping presses are designed to incorporate a variety of stamping automation solutions, provide flexibility for enhanced performance and integrate with KRRASS Press System’s suite of machine monitoring software. Our customers spoke, and we listened.

NC Press Brake Series press brakes, perfectly equipped for sensitive bending, energy efficient solutions.

With its easy to use control units, rigid body frame, perfect design, high efficiency, multiple tool usage solutions, top level CE safety standards and with its suitable price range, NC Press Brake is the World leader in its category. Perfectly equipped for sensitive bending, energy efficient solutions.

NC Press Brake Series press brakes, perfectly equipped for sensitive bending, energy efficient solutions.

With its easy to use control units, rigid body frame, perfect design, high efficiency, multiple tool usage solutions, top level CE safety standards and with its suitable price range, NC Press Brake is the World leader in its category. Perfectly equipped for sensitive bending, energy efficient solutions.

NC Press Brake Series press brakes, perfectly equipped for sensitive bending, energy efficient solutions.

With its easy to use control units, rigid body frame, perfect design, high efficiency, multiple tool usage solutions, top level CE safety standards and with its suitable price range, NC Press Brake is the World leader in its category. Perfectly equipped for sensitive bending, energy efficient solutions.

What is Press Brake?

The press brake is to use the equipped mold (general or special mold) to bend the cold metal sheet into various geometric cross-sectional shapes. The press brake generally adopts the special CNC system for the press brake. The coordinate axis of the press brake has been changed from the single The axis is developed to 12 axes, and the numerical control system can automatically realize the sliding depth control, the left and right tilt adjustment of the sliding block, the front and back adjustment of the back stopper, the left and right adjustment, the pressure tonnage adjustment and the slider approaching speed adjustment and so on. The press brake can easily realize the actions of slide down, jog, continuous, pressure holding, return stroke and halfway stop, and can bend multiple elbows of the same angle or different angles in one feeding.

What is nc press brake?

The technical field of nc press brake specifically relates to a press brake torsion shaft synchronization device. The torsion shaft synchronization device includes a synchronous torsion shaft, a swing arm connected to both ends of the synchronous torsion shaft, and a connecting rod connected to the swing arm.One end of the swing arm is movably connected with the synchronous torsion shaft, the other end of the swing arm is movably connected with the connecting rod, the bottom end of the connecting rod is provided with a swing arm pier, and a slider reinforcement is provided below the swing arm pier.

Ribs, the slider reinforcement ribs are arranged inside the slider and support the slider. The two ends of the synchronous torsion shaft can move synchronously, so that the two ends of the slider can move up and down synchronously to meet the requirements of its balance. The torsion axis servo press brake has the characteristics of reasonable design, simple assembly adjustment, easy parts processing, and improved product quality.

What is cnc press brake?

The cnc press brake does not need to take special measures during the return (up) trip. In the fast-forward phase of the descending stroke, on the basis of parallel synchronization, two one-way throttle valves are used to eliminate the deviation caused by factors such as manufacturing quality, leakage, etc., and to ensure the downward movement with a certain synchronization accuracy. When it enters the work advancement stage but has not touched the workpiece, two correction plunger cylinders installed on the workbench are used for further synchronization correction. Imagine that one side first comes into contact with the correction plunger, and the larger correction force slows down or stops the movement of that side until the other side catches up and contacts the correction post hydraulic and pneumatic plugs at the same time. The correction force can be set by the overflow valve and read by the pressure gauge. Practice has shown that the synchronization effect is very obvious, this is because various asynchrony factors can be ignored compared with the correction force. In order to make full use of the capacity of the machine, the overflow valve 3 should be unloaded after a period of time.

The biggest difference between nc press brake and cnc press brake:

1. Different structural principles

The design principles of the two models are different, resulting in different structures for ensuring synchronization on both sides of the bending slider. The nc press brake uses a torsion shaft to link the left and right swing rods to form a torsion shaft forcing a synchronization mechanism to move up and down the cylinders on both sides. Therefore, the torsion shaft synchronization press brake is a mechanical forced synchronization method, and the parallelism of the slider cannot be automatically checked and automatically adjusted.
The CNC press brake is to install a magnetic (optical) scale on the slider and the wall plate. The CNC system can analyze the synchronization of the two sides of the slider through the feedback information from the magnetic (optical) scale at any time. If there is an error, the CNC system will pass The proportional electro-hydraulic servo valve is adjusted to synchronize the strokes on both sides of the slider. Numerical control system, hydraulic control valve group and magnetic scale constitute the feedback closed-loop control of cnc press brake.

2. Accuracy

The parallelism of the slider determines the angle of the workpiece. NC press brake is the mechanism to keep the slider synchronized. There is no real-time error feedback, and the machine itself cannot make automatic adjustments. In addition, its partial load capacity is poor (NC press brake uses the torsion shaft to force the synchronization mechanism to move up and down the cylinders on both sides, if the long-term partial load will cause the torsion shaft to deform)
Cnc press brake is the system through the proportional electro-hydraulic valve group to control the slider synchronization, the magnetic (optical) scale real-time error feedback, if there is an error, the system will adjust through the proportional valve after the magnetic (optical) scale feedback to maintain the synchronization of the slider.

3. Speed

There are two points in the work of the machine that determine its operating speed: (1) Slider speed, (2) Backgauge speed, (3) Bending step
The cylinder of nc press brake is 6:1 or 8:1, which is slow, while the cylinder of cnc press brake is 13:1 or 15:1, which is fast. Therefore, the fast down speed and return speed of cnc press brake are much higher than that of nc press brake.

4. Operation

Because nc press brake is not equipped with a control system and no V-axis compensation, it can only rely on the experience of old workers to do trial bending when processing according to the drawings. If you do not meet the standard, you must continue to try. This process not only produces waste, but also has a small selection range and high wages when recruiting operators.
The cnc press brake is controlled by a professional numerical control system, with V-axis compensation, simple operation, and low requirements for worker experience. There is a simulation bending function, no stakeout is required, only the size of the drawing input step needs to be corrected, and the bending is carried out directly.

5. Strength

Because of its own design, the NC press brake cannot bend under unbalanced load. If it is bent under unbalanced load for a long time, it will cause deformation of the torsion shaft.
The cnc press brake does not have such a problem. The Y1 and Y2 axes on the left and right sides run independently, so they can be eccentrically folded.

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