Press Brake

Our commitment to excellence extends beyond product offerings. We are dedicated to providing our clients with innovative solutions that enhance productivity, promote efficiency, and deliver customized answers to meet their specific needs. Discover how our CNC Press Brake technology can transform your manufacturing operations, streamline your workflows, and drive your success to new heights.

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Exquisite Craftsmanship in Every Press Brake

As a leading press brake manufacturer, KRRASS® is proud to supply a diverse range of high-quality press brake machines to customers worldwide. Harness the strength and precision of our advanced bending machines, a testament to KRRASS®’s relentless pursuit of perfection. Our extensive cooperation with renowned global brands and the innovative ideas from our headquarters' R&D center ensure that our bending machines represent the pinnacle of sheet metal processing technology.

Our commitment extends beyond manufacturing. We have invested in a state-of-the-art intelligent CNC machine factory in Nanjing to ensure that each piece of equipment upholds our brand’s reputation for excellence.

Join Our Global Family

Be part of the KRRASS® legacy. With branches in more than ten countries, our global footprint is a testament to our trustworthiness and reliability. Contact us today to discover how our expertise can revolutionize your operations.

Press Brake List

MB8 Series Advanced Sheet Metal Press Brake (DA-53T Controller)

3-4 Axis Back Gauge Press Brake

MB8 Series Advanced Sheet Metal Press Brake (DA-53T Controller)

MB8 Series Advanced CNC Press Brake Machine (DA-58Tx Controller)

3-4 Axis Back Gauge Press Brake

MB8 Series Advanced CNC Press Brake Machine (DA-58Tx Controller)

MB8 Series High Standard CNC Press Brake (DA-66T, DA-69T )

6-8 Axis Back Gauge Press Brake

MB8 Series High Standard CNC Press Brake (DA-66T, DA-69T )

PBS Series Main Motor Servo CNC Press Brake

High Performances At All Level

PBS Series Main Motor Servo CNC Press Brake

PBE Series Hybrid CNC Press Brake

Green Hybrid Technology

PBE Series Hybrid CNC Press Brake

Press Brake - hybrid cnc press brake

Green Hybrid Technology

EPP Series Electric Servo Press Brake

WC67K Series NC Press Brake (E21 Control)

Simple NC Press Brake Machine For Sheet Bending

WC67K Series NC Press Brake (E21 Control)

WC67K Series NC Press Brake (E310P Control)

2-Axis Servo Bending Machine

WC67K Series NC Press Brake (E310P Control)

WC67K Series NC Press Brake (DA41T Control)

2-Axis Servo Bending Machine

WC67K Series NC Press Brake (DA41T Control)

Customer Case

Press Brake - русская гибочная машина
Customer Photo
Press Brake - customer photo 008
Press Brake - customer photo 006
Press Brake - cnc press brake
Customer Photo

High Quality Press Brake Display

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FAQ

What is Press Brake?

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 brak can quickly realize the actions of sliding down, jogging, continuous, pressure holding, return stroke and halfway stop, and bend multiple elbows of the same angle or different angles in one feeding.

The press brake generally adopts a special CNC system for the bending machine. The coordinate axis of the bending machine has been changed from a single axis is developed to 12 axes, and the numerical control system can automatically realize the sliding depth control, the left and proper 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 so and on.

What is NC Press Brake?

NC press brakes are two-axis programmable tools that use torsion bars for synchronization. NC, or Numerical Control, refers to the use of a numerical control system to manage the machine's movements. NC press brakes typically employ pre-written numerical programs to control bending operations. These programs contain a series of coordinates and motion instructions to determine the shape and bending angles of the workpiece. Operators must manually input these numerical programs, often using the machine's control panel or an external computer. NC press brakes are generally less expensive than CNC press brakes but require more operator skill. NC press brake controllers can be programmed for complex bending sequences, such as those offered by Delem 41, E21, and Cyblec. They remain an accurate and cost-effective option.

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.

What is hydraulic Press Brake?

The Hydraulic Press Brake includes a bracket, a workbench and a clamping plate. The workbench is placed on the bracket. The workbench is composed of a base and a pressure plate. The base is connected to the clamping plate through a hinge. The base is composed of a seat shell, a coil and a cover plate. The coil It is placed in the depression of the seat shell, and the top of the depression is covered with a cover plate.

When in use, the wire is energized to the coil, and after energization, an attractive force is generated on the pressure plate, so as to realize the clamping of the thin plate between the pressure plate and the base. Due to the use of electromagnetic force clamping, the pressure plate can be made into a variety of workpiece requirements, and it can also process workpieces with side walls. Hydraulic press brakes are the safest and more controllable than a mechanical brake. They generally allow for multiple speed settings. Hydraulic also allows for more precision bends, providing greater control when inching down and getting set for a job.

Hydraulic Press Brake Instructions

Step on the foot switch to start bending. Unlike the shearing machine, the bending machine can be released at any time, and the bending machine will stop when the foot is released, and continue to go down after stepping on it.

First, turn on the power, turn on the key switch on the control panel, and then press the oil pump to start, so that you can hear the sound of the oil pump turning. (The machine does not work at this time)

Stroke adjustment, the use of the bending machine must pay attention to the adjustment of the stroke, and it must be tested before bending. When the upper die of the bending machine goes down to the bottom, there must be a gap of plate thickness. Otherwise it will cause damage to the mold and machine. The stroke adjustment also has electric quick adjustment and manual fine adjustment.

For the selection of the bending notch, generally a notch with a width 8 times the thickness of the plate should be selected. If you bend a 4mm sheet, you need to choose a notch of about 32.

There are generally electric quick adjustments and manual fine adjustments for the adjustment of the back gauge, and the method is the same as that of the shearing machine.

How Does a Hydraulic Press Brake Work?

A hydraulic press brake uses the power of a hydraulic motor to apply force onto the metal, compressing it into the die forming the shape. It is the shape of the die that determines the shape acquired with the metal bending process.

The Bending Device of a Hydraulic Press Brake

The bending device of a hydraulic press brake is a stamping process where the sheet metal is stamped into the mold or dies for casting the metal to the required shape. Sheet metal is fed into the device, which gets aligned onto the die. Then as force is applied, the metal is cast as per the shape of the die.

The Die of a Hydraulic Press Brakes

The die is a crucial part of a hydraulic brake because the shape and strength of the die shape the metal. It is possible to cast almost any shape using the latest devices that come with standard and upgraded options for easy and customized shaping. For accuracy in the shaping process, hydraulic press brakes are also designed to be vibration-free.

Why Use a Hydraulic Press?

Hydraulic press brakes can carry out an automated bending process, and the choice of many manufacturers looking for cost-effective bending processes. The precision of the bending is also exact. Moreover, as hydraulic press brakes are available in user-friendly formats, the operator’s ease of use allows for fast metal bending operations.

What Are the Biggest Differences Between CNC Bending Machine and NC Bending Machine?

  1. Different Structural Principles
    The design principles of the two models are different, resulting in varied 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, forming a mechanical synchronization method. The parallelism of the slider isn't automatically checked or adjusted. Conversely, the CNC bending machine uses a magnetic (optical) scale on the slider and wall plate. The CNC system analyzes synchronization through feedback from the scale, adjusting via the proportional electro-hydraulic servo valve for precise synchronization. This setup forms a feedback closed-loop control system.
  2. Accuracy
    The parallelism of the slider determines the angle of the workpiece. NC press brakes lack real-time error feedback, so the machine cannot adjust automatically. They also have poor partial load capacity due to the torsion shaft synchronization mechanism. The CNC bending machine, however, uses a proportional electro-hydraulic valve group for slider synchronization and provides real-time error feedback. The system adjusts through the proportional valve after feedback from the magnetic (optical) scale to maintain slider synchronization.
  3. Speed and Operation
    The speed of the machine involves slider speed, backgauge speed, and bending steps. NC machines have slower cylinder ratios (6:1 or 8:1), while CNC models are faster (13:1 or 15:1). NC machines rely on experienced operators for trial bending, lacking a control system and V-axis compensation, which can lead to waste and higher operator costs. CNC models, with a professional numerical control system and V-axis compensation, offer simple operation, low experience requirements, and a simulation bending function, eliminating the need for stakeout.
  4. Strength and Load Capacity
    NC press brakes cannot handle unbalanced loads without risk of torsion shaft deformation. CNC models don't face this issue; their Y1 and Y2 axes run independently, allowing for eccentric folding.
  5. Comparison of Various Models
    When selecting a bending machine, comparing specifications is essential. Consider factors such as tonnage, bed length, stroke, and additional features like tooling options. For example, a 12-ton press with a 20-inch bed length may suit different needs than a 50-ton model with a 6-foot bed length. Understanding the condition and location of machines, influences decision-making. Pricing and request options for quotes or further information can also guide choices, ensuring the machine fits both technical and budgetary requirements.

KRRASS Tailored-made Press Brake

KRRASS® Each sheet metal press brake machine is designed to meet your production needs. Whether you are looking for a NC Press Brake or a CNC Press Brake, we can fulfill your every requirement.

Adds-on, tandem or tridem press brakes, automatic tool changers, and automated robotic bending machine cells are only some solutions we offer to help you achieve your goals.

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5 /5
Based on 179 ratings

Reviewed by 179 users

  • CNC press brake

    • 1 year ago

    Hello, I am Simpson from America. We bought a CNC press brake in 2018. I have to say KRRASS machine is good quality. It works well. We just changed a die recently.

    • 1 year ago

    Hola, Amigo. Soy de México, compré una máquina de curvar el pasado mes de febrero. Esta máquina ha excedido mis expectativas. Lo uso para procesar todo tipo de productos, que es muy fácil de usar y rápido.
    Gracias, Tinky de KRRASS.

  • Perfect machine

    • 1 year ago

    I bought a Press brake MB8-110T3200 from KRRASS on September,now the machine works smoothly and the performance is surprisingly perfect,I feel very lucky that I chose KRRASS,will still buy from you in the future.

    • 1 year ago

    I would like to introduce KRRASS’s Press brake to my friend. Really good machine.
    Even your worker dont know the basic knowledge, KRRASS will help you finished all of installation operation guidence since your received the machine till u can use it well.
    Impressive service and machine

  • الفرامل الصحافة باستخدام الحاسب الآلي

    • 1 year ago

    لقد استلمت الجهاز وأستخدمه منذ فترة والنتيجة جيدة جدًا وأنا راضٍ تمامًا.

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