The development status of press brakes at home and abroad. Details.

The ** of CNC bending machines is about tens of thousands of yuan per unit, the cheap ones are one or two thousand yuan, and the expensive ones are one or two hundred thousand yuan. The first CNC bending machine is affected by many aspects, such as brand, category, specification, market, etc. The key is to learn how to choose.

Workpiece, the first important thing to consider is the part you want to produce, the point is to buy a machine that can do the machining task with a short table and a small tonnage. Careful consideration is given to the material grade as well as the large processing thickness and length. If most of the work is low-carbon steel with a thickness of 16 gauge and a maximum length of 10 feet, then the free bending force does not have to be greater than 50 tons.

However, if you are engaged in a large number of bottomed die molding, you may want to consider a 150-tonnage machine tool. Well, let's say the thicker material is 1 4 inches, 10 feet of free bending takes 165 tons, and there is a bottom....

It is divided into ordinary torsion shaft digital display bending machine, and CNC bending machine.

CNC bending machines are divided into ordinary numerical control and electro-hydraulic servo synchronous CNC bending machines.

Donghai Machine Tool in Anhui is a large-scale manufacturer specializing in the production of press brakes.

The domestic development has basically reached the bottleneck, foreign machine tools in a single bending machine research and development has not updated the breakthrough, but in the whole sheet flexible processing of the move, many foreign companies began to from the CNC punching, or laser cutting for the front process, behind the mold bending based on a production line to spend effort.

The bottleneck has been reached, mainly in Nantong, Anhui. Disgusting competition.

(1) Free bending.

The free bending method is a commonly used method in Zui. Free bending is to use the two edges at the opening of the die and the edge of the top of the punch to bend, and the bending angle is determined by the depth of the punch into the die. The bending force required for free bending is small, and the force of the die is gentle, which can prolong the service life of the die, and its disadvantage is that the thickness of the sheet and the inconsistency of the mechanical properties and the rolling direction of the steel plate will cause the change of the bending angle.

2) Correction of bending.

Corrective bending is the fine pressing of the fillet and straight edge of the workpiece by the punch. In the process of downward movement of the punch, the angle of the blank will be less than the angle of the die and produce negative springback; At the end of the stroke, the convex and concave die corrects the blank so that its rounded corners, straight edges, and bending radius are all close to the punch. It can be seen that corrective bending can effectively overcome the rebound effect, so that high bending accuracy can be obtained.

3) Three-point bending.

This part is processed with a CNC press, and it only needs to program and clamp and position it once to complete all the processing. Its programming time is more.

2. Three hours, the processing time is only a few minutes, and the processing accuracy is high. The pressure of the hydraulic pad is evenly distributed over the entire bending length, so that the bending force of the punch is also evenly distributed over the entire length of the bending. Each punch is elastically supported, so it can automatically adapt to the bending straightness of the die and ensure a constant pressure distribution, which improves the accuracy of the bending angle and the straightness of the bending corner.

The bending angle error of the three-point bending method is 15 degrees, which is equivalent to the accuracy of correcting the bending. Bending thicknesses up to 20 mm. When the thickness of the plate is more than 3mm, the three-point bending method is the best way to get the bending.

This is because, in addition to this, the only way to achieve the same bending accuracy is to use a corrective bending, but the bending force will exceed the pressure limit that the die can withstand.

The press brake is the same as the shearing machine, and there are three kinds of manuals.

Among them, the manual bending machine is divided into moving. On the hydraulic press brake, there are two types: upward and downward moving. The coordinate axis of the bending machine has been developed from a single axis to 12 axes, which can be automatically controlled by the numerical control system to control the running depth of the slider, the left and right tilt adjustment of the slider, the front and rear adjustment of the rear material stopper, the left and right adjustment, the pressure tonnage adjustment and the adjustment of the working speed of the slider approaching and so on.

CNC bending machines are generally made of all-steel welded layout, which has sufficient strength and rigidity. Hydraulic upper transmission, the cylinders at both ends of the bending machine are placed on the slider to directly drive the sliding operation. The slider synchronization organization selects the torsion shaft to force the synchronization.

The mechanical block layout is selected, which is stable and reliable. The slider stroke is motorized and quickly adjusted, manual, and the counter is displayed. The wedge-type deflection compensation organization is used to ensure high bending accuracy.

There are three layout types commonly used in CNC bending machines:

1. Upward moving CNC bending machine, that is, the downward movement of the slider strand punch. In order to ensure that when the slider is operated and returned, the slider will not be skewed relative to the working table due to the difference between the eccentric load and the resistance of the left and right cylinder pipelines, and then affect the forming quality of the workpiece, and the slider motion synchronous control system is generally equipped.

2. Downward moving CNC bending machine, that is, the slider is installed in the lower part of the machine tool, and the strand dies move upward. The operating oil cylinder is placed in the center of the slider, and the tonnal force is a single cylinder when the tonnal force is small, and the tonnal force is three cylinders when the nominal force is large. Because the working cylinder is concentrated in the middle of the slider, the deformation of the slider and the beam is common, and the gap between the convex and concave molds is uniform in the full length of the slider, so the bending accuracy of the workpiece is higher.

3. The three-point bending CNC bending machine is operated according to the operating principle of the three-point bending method mentioned above, and the strength of the three-point bending machine lies in the high bending accuracy, wide process use, and has the function of four-sided forming machine. However, the layout of the bending machine is messy, the cost is high, and the current ** is equivalent to twice that of the upward CNC bending machine.

Hello, first of all, turn on the power of the press brake, and then start the oil pump, after this series of operations is completed, the oil pump will start to work. At this point, the machine does not need to move. Secondly, make stroke adjustments.

When the press brake goes to the bottom, it is necessary to ensure that there is a certain distance, if there is no distance, it will cause damage to the machine. It can be adjusted electrically or manually. However, the use of the press brake must pay attention to the stroke adjustment.

Finally, select the notch of the press brake. Generally, the length of the notch plate thickness to be selected has a multiple relationship with the width, such as bending 4 mm of sheet, you need about 32 mm of the V notch of the die under the press brake. The backgauge adjustment can be electrically adjusted or fine-tuned manually.

Note that when the press brake is used, it can only be bent after turning on the foot switch, it can be released at any time, it can also be stopped at any time, and it can continue to go down after stepping on it. That is to say, the downward movement of the press brake can be controlled at any time, so the press brake is still relatively convenient to operate. Hope mine can help you.

Hello, first of all, turn on the power of the press brake, and then start the oil pump, after this series of operations is completed, the oil pump will start to work. At this point, the machine does not need to move. Secondly, make stroke adjustments.

When the press brake goes to the bottom, it is necessary to ensure that there is a certain distance, if there is no distance, it will cause damage to the machine. It can be adjusted electrically or manually. However, the use of the press brake must pay attention to the stroke adjustment.

Finally, select the notch of the press brake. Generally, the length of the notch plate thickness to be selected has a multiple relationship with the width, such as bending 4 mm of sheet, you need about 32 mm of the V notch of the die under the press brake. The backgauge adjustment can be electrically adjusted or fine-tuned manually.

Note that when the press brake is used, it can only be bent after turning on the foot switch, it can be released at any time, it can also be stopped at any time, and it can continue to go down after stepping on it. That is to say, the downward movement of the press brake can be controlled at any time, so the press brake is still relatively convenient to operate. Hope mine can help you.

Hello dear, the world's largest metal bending machine made in China, 12 meters long, pressure up to 3000 tons, bending machine is a machine that can bend thin plates, its structure mainly 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 pressing plate, the base is connected with the clamping plate by a hinge, the base is composed of a seat shell, a line of rotten circles and a cover plate, the coil is placed in the recess of the seat shell, and the top of the depression is covered with a cover plate. When the base is cleared, the coil is energized by the wire, and the gravitational force is generated on the pressing plate after the power is turned on, so as to realize the clamping of the thin plate between the pressing 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 the workpiece with side walls can be processed, and the operation is also very simple.

Summary. Hello dear, <>

The overall materials of the press brake are; Cast iron: The body and frame of the press brake are usually made of cast iron, because cast iron has the advantages of high strength, high rigidity, wear resistance, corrosion resistance, heat resistance, etc. Steel:

Parts such as workbenches and tool holders of press brakes are usually made of steel, because steel has the characteristics of high strength, high hardness, wear resistance, tensile resistance, etc. Electronic components: The control system of the press brake usually uses electronic components, such as PLC, servo motor, encoder, sensor, etc., to control the operation of the press brake and the accuracy and stability in the bending process.

Hydraulic components: The hydraulic system of the press brake usually uses hydraulic components such as oil pumps, hydraulic cylinders, oil pipes, and oil tanks to realize the loading and unloading, bending, and adjustment of the press brake.

The press brake is generally made of those materials.

Hello dear, <>

The overall materials of the press brake are; Cast iron: The body and frame of the press brake are usually made of cast iron, because cast iron has the advantages of high strength, high rigidity, wear resistance, corrosion resistance, heat resistance, etc. Steel:

Empty parts such as workbenches and tool holders of press brakes are usually made of steel, because steel has the characteristics of high strength, high hardness, resistance to wear, and resistance to tensile work. Electronic components: The control system of the press brake usually uses electronic components, such as PLC, servo motor, encoder, sensor, etc., to control the operation of the press brake and the accuracy and stability in the bending process.

Hydraulic components: The hydraulic system of the bending machine usually uses hydraulic components such as oil pumps, hydraulic cylinders, oil pipes, and oil tanks, which are used to realize the loading and unloading, bending, and adjustment actions of the folding waiter bending machine.

The materials that are more suitable for bending parts are as follows; 1. Carbon tool steel T8A, T10A and other carbon tool steels have been widely used in bending machine molds, and their processing performance is excellent and low. 2. Low-alloy steel tool steel is based on carbon tool steel and adds an appropriate amount of alloy element to carbon tool steel. Compared to carbon tool steel, hardenability and wear resistance are improved.

3. High-carbon and high-chromium tool steel code D2 (code D2) is a commonly used high-carbon and high-chromium tool steel, which is hardened, wear-resistant, wear-resistant, and wear-resistant, and is a die steel for high-wear-resistant and micro-deformation bending machines. Bichijian 4, medium chromium high carbon tool steel, medium chromium high carbon tool steel medium chromium high carbon tool steel has low chromium content, uniform carbide distribution, good hardenability, and good dimensional stability. The results show that the performance of high-carbon and high-chromium steels with a high degree of carbide segregation is improved.

5. High-speed steel has high hardness in bending machine die steel, which is wear-resistant and has high compressive strength. Carbon reduction and vanadium reduction high-speed steel 6W6Mo5Cr4V (code 6W6 or M2) developed to improve toughness. To improve carbide distribution, HSS also needs to be forged.

I wish you a happy life! Hope mine is helpful to you ha.

The main materials of the press brake include:1Rack:

The frame of the press brake is usually made of materials such as steel plate, welded steel frame, or aluminum alloy, because the frame needs to be strong and rigid enough to withstand the forces during machining. 2.Pressed parts:

The pressed parts in the press brakes are usually made of high-strength steel, alloys or other special materials to ensure that they can withstand the high pressures of the mountain sail bridge. 3.Control system:

The materials used in the control systems of modern press brakes are increasingly using high-quality electronic components, such as high-speed electronic controllers, PLCs, microprocessors, etc., to greatly improve machining accuracy and production efficiency. 4.Hydraulics:

The hydraulic system of the press brake is usually made of materials such as high-strength steel, copper tubes, cemented carbide, etc., to ensure the stability and reliability of the hydraulic system. Summary: The press brake is a relatively complex mechanical equipment, the main materials include the frame, pressed parts, control system and hydraulic system.

Factors such as durability, strength, rigidity, and stability should be considered in the selection of materials to ensure the reliability, accuracy, and production efficiency of the equipment.