Views: 231 Author: Site Editor Publish Time: 2020-11-22 Origin: Site
step 1. Punch and die is the important part for bending process. we need to choose the right punch and die for our products before running the machine.
step2. Because the die v opening is corresponding to the bending sheet thickness, we need to choose the right opening for the bending job.
step3. Because this is hydraulic press brake machine. we need to prepare the hydraulic oil firstly. The oil type is #46 anti-wear hydraulic oil and we need to fill the tank until it is full.
step4. We need to prepare the necessary cable according to the machine power in advance, when we get the cable, one end will be connected to the power, another end will be connected to the machine electric cabinet.
step5. After the connection of the cable, we will start the machine power and pump and check the motor rotating direction. if the direction is anticlockwise, we need to exchange the cable each line and try again until the rotating direction is clockwise.
step6. When the machine is running, we need to program on the controller according to the product that we will bend step by step. we can also operate in manual mode or auto mode according to our bending purpose.
step7. After the programming, we will put the metal sheet on the bottom die and start the bending work step by step and finish the product finally.
The modern hydraulic press brake uses a hydraulic pump and hydraulic cylinders to move the ram. This design is far more efficient, allowing increased speed and accuracy. It can be divided into two basic subgroups, up-acting, and down-acting (all other types of press brakes are down-acting only).
The up-acting press brake
The French-designed and were the first to use, the up-acting style of the press brake. In the author's opinion, up-acting is the best type of press brake, not only because of the ram's guidance and arrangement of rollers but also because of its natural anti-deflection characteristics. On this machine you have gravity on your side, working with you instead of against you.
For any mechanical device to have movement, it must have some clearance built-in to allow the mechanism to function freely. On the press brake, an important clearance lies between the power source and the ram body. The clearance is just right when the machine is new or rebuilt. However, with age and use this clearance will increase (sometimes dramatically), causing an ever-increasing amount of play in the mechanism. When the press is down-acting, this excess clearance, or"play," is located on the bottom when no load is present. When a load is applied, such as when a piece of material is formed, this error moves to the top of the connection. This hurts the ram's repeatability often leading to vast swings in bend angle from one work pieces to the next.
The up-acting press brake, on the other hand, always keeps this play on the bottom. whether under pressure or not.
The down-acting press brake
Down-acting hydraulic press brakes represent 95% of all press brakes in use today. Of all the clown-acting press brakes. the hydraulic is, by far, the most accurate. These machines are controlled by a CNC or NC controller (computer numerical control or numerical control). The computers, in turn, control a proportional valve system, This system allows for ram control in the downward direction, which, in turn, gives accurate bend angle control.
Press brake machine is an important equipment in sheet metal processing, and its working accuracy directly affects the bending accuracy of workpieces. In the bending process of the workpiece, because the two ends of the ram are stressed mostly, the reaction force when the plate is bent leads to concave deformation of the lower surface of the ram, and the deformation of the middle part of the ram is the most, the final bent workpieces have different angles in the whole length direction. In order to eliminate the adverse effects of ram deformation, it is necessary to compensate the deflection deformation of ram. The usual Crowning Systems are hydraulic Crowning and mechanical Crowning, which make the middle part of the workbench produce upward elastic deformation to offset the deformation of the ram of Press Brake, ensure the precision of machining joint surface and improve the precision of workpiece. At present, major foreign press brake manufacturers have adopted mechanical crowning devices. Domestic manufacturers will choose the appropriate Crowning method according to the actual situation.
Common classifications of press brakes are as follows:
Manual press brake
This type of press brake has a relatively simple structure and is labor-intensive through manual operation, and is suitable for small-scale processing.
CNC press brake
The essence of the CNC press brake is a CNC press brake mold for bending thin plates. The mold is composed of a bracket, a workable and a clamping plate. Clamping of thin plates. Because the electromagnetic force clamping method is adopted, the pressing plate is made according to the specific workpiece requirements, the operation is simple, and the workpiece with the sidewall can be processed.
Hydraulic CNC press brake
Hydraulic press brake can be divided into torsion shaft synchronization, machine-hydraulic synchronization, and electro-hydraulic synchronization according to the different synchronization methods. Hydraulic bending machine is divided into the upper-moving type and lower-moving type according to the different movement modes.
The hydraulic press brake is mainly used in the sheet metal industry, such as bending and forming automobiles, doors and windows, steel structures, etc.: V-grooving of metal sheets and other fields. Its structure and working characteristics are all-steel welded structure, vibration relief stress, high machine strength and good rigidity. Hydraulic upper transmission, is stable and reliable. Mechanical stop, torsion axis synchronization, high precision. The back gauge distance and the stroke of the upper slider are electrically adjusted, manually fine-tuned, and digial display.
A With the development of the economy, the development of industrial processing technology is very rapid. Under these circumstances, people's demand for the industry will be assisted by a large number of mechanical equipment. Bending machine plays an important role in the manufacturing process of modern mechanical equipment. In the current market, manufacturers of high-quality bending machines have emerged one after another. So how to make the right choice among many bending machine brands?
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