Question 1

What is Press Brake?

Accepted Answer

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.

Question 2

What is NC Press Brake?

Accepted Answer

The technical field of nc press brake specifically relates to a bending machine 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 bending machine has the characteristics of reasonable design, simple assembly adjustment, easy parts processing, and improved product quality.

Question 3

What is CNC Press Brake?

Accepted Answer

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.

Question 4

What is hydraulic Press Brake?

Accepted Answer

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.

Read More: Hydraulic Press Brake: In-Depth Look

Hydraulic Press Brake Instructions

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.
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.

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.

Question 5

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

Accepted Answer

Read More: CNC Press Brake vs NC Press Brake: What’s the Difference

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 bending machine is a mechanical forced synchronization method, and the parallelism of the slider cannot be automatically checked and automatically adjusted. The CNC bending machine 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.
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 bending machine 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 bending machine 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.
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 bending machine 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 bending machine are much higher than that of nc press brake.
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.
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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FAQ

Hydraulic Press Brake Instructions

How Does a Hydraulic Press Brake Work?

The Bending Device of a Hydraulic Press Brake

The Die of a Hydraulic Press Brakes

Why Use a Hydraulic Press?

Different structural principles

Accuracy

Speed

Operation

Strength

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