The Difference Between Bending And Folding

Bending And Folding

Bending And Folding In recent years, 30% of the sheet metal factories in Europe and the United States and other developed countries have begun to use the folding machine to replace the traditional bending machine for part of the sheet metal bending. Compared with the bending machine, the folding machine is a bending equipment with many advantages, which is more convenient to operate. In this paper, making a simple introduction bending machine and folding machine, the figure below is the difference between the working principle of bending machine and folding machine. Bending And Folding

Bending machine

Bending machine is divided into hydraulic bending machine and CNC bending machine, according to the mode of motion can be divided into up and down. According to the synchronous mode, hydraulic bending machine can be divided into torsion shaft synchronous and electric hydraulic synchronous. Bending And Folding

Numerical control bending machine realizes the bending function by controlling the slider stroke and back stop of the bending machine. When using CNC bending machine, as long as the part drawing of the work piece and the bending angle of each step are input, the bending machine will be realized one by one according to the input steps. The advanced CNC bending machine mainly adopts electric hydraulic servo system and grating ruler to form full closed-loop control, with high synchronous control precision, bending precision and repositioning precision.

In use, the CNC bending machine can be operated flexibly, which can realize the super long plate processing by double machine linkage, and can process parts by single machine operation. This not only improves the use efficiency of the bending machine, but also reduces the energy consumption. The bending machine comprises a bracket, a worktable and a clamping plate. The worktable is composed of a base and a pressing plate and is arranged on the bracket; The base is composed of a base shell, a coil and a cover plate, which is connected with the clamping plate through a hinge.

The coil is placed in the depression of the base shell, and the top of the depression is covered with a cover plate. When in use, the coil is electrified by the wire, and after being electrified, the pressing plate is attracted, so as to realize the clamping of the thin plate between the pressing plate and the base. The bending machine can meet the needs of various work pieces by replacing the bending machine mold. Bending And Folding

• Working characteristics of bending machine Bending And Folding

1. The requirements for operators are relatively high and the operator is required to position the bending flange. Bending And Folding
2. The operator must hold the material. Bending And Folding
3. The side with large material area is placed outside the bending machine. Bending And Folding
4. For the bending of large work pieces, it is difficult for one operator to complete, which requires two or more people to work at the same time. Bending And Folding

• Determinants of bending angle of bending machine Bending And Folding

1. Stroke of slider. Bending And Folding
2. Mold size. Bending And Folding
3. Change of material thickness. Bending And Folding
4. The quality of supporting materials for operators. Bending And Folding

Folding machine

Folding machine is a simple bending machine, divided into manual folding machine and pneumatic folding machine. Bending And Folding

Folding machine is a kind of machine to process the edge of products. It is used to produce stainless steel sheet products with simple shape in a large scale. However, with the continuous updating and maturity of technology, these products are produced by cold bending punch. The folding machine uses the model with bending radius to fix the steel plate on the worktable of the machine tool, and the protruding part of the material is placed on the movable worktable, which can rotate along the center of the bending radius. Bending And Folding

When the movable table rises, the stainless steel can be bent to the required angle. When bending, because the stainless steel will slide on the worktable, in order to prevent material scratch, on the one hand, the worktable surface should be smooth, on the other hand, a layer of plastic film should be pasted on the stainless steel surface to prevent work piece scratch. The upper beam of the folding machine is usually made into a wedge to form a gap, so that the blank with proper shape can be folded into a quadrilateral box or groove. Typical legend of folding machine is shown in the figure below. Bending And Folding

• Working characteristics of folding machine Bending And Folding

1. The technical requirements for operators are not high.
2. In the process of folding, the sheet is placed on the back stop table to ensure the folding distance and hold the sheet. In the manual mode, the safety of the folding machine operator is greatly improved.
3. Small plate thickness error will not affect the bending accuracy. Bending And Folding
4. The folding machine can also fold into a very small space, and the folding of different plate thickness does not need to change the mold, so it has certain advantages in large arc bending.
5. Small edge width, low cost. Bending And Folding

• Working characteristics of folding machine Bending And Folding

1. Before operation, wear tight protective clothing, fasten the cuffs, keep the lower hem of the jacket open, and do not wear, take off or change clothes beside the machine tool, or put cloth around the body, so as to prevent the machine from wringing. Must wear a helmet, braids should be put into the hat, not to wear skirts, slippers. Bending And Folding
2. The folding workers should have a certain professional study, understand the structure and performance of the machine tool they operate, and correctly install the mold, so that they can operate independently.
3. Add lubricating oil before use, and check the empty car for two minutes. Bending And Folding
4. After starting, it should wait until the running speed is normal; At the same time, observe the dynamics of the surrounding personnel to prevent injury.
5. Do not use the machine beyond the specification. Bending And Folding
6. Welding scar and big burr are not allowed on the material to prevent mold damage. Bending And Folding
7. When the work piece is turned over or moved forward or backward, the operators on both sides shall keep close contact and act the same.
8. After work, cut off the power supply, do a good job in machine maintenance and environmental cleaning.

• Operation principle of folding machine

The upper beam piece is usually wedge-shaped to form a gap, so that it can be folded into a quadrilateral box or groove with a blank of proper shape.

Folding machine is often used to produce a wide range of simple shape stainless steel or galvanized sheet products, but these products are mostly produced by cold bending punch.

• Application of folding machine in HVAC air duct industry

Folding machine is divided into flat folding machine and plate folding machine in the ventilation pipe industry. Flat edge folding machine is used for folding plate forming, and common plate folding machine adopts serrated die, which is mainly used for bending forming of common plate flange square air duct.

The optimization of the overall production process is the wish of every enterprise, because the optimization of the production process can ultimately achieve the reduction of human costs, the improvement of work efficiency and the accuracy of production quality. Therefore, with the deepening of people’s understanding of bending machine and folding machine, the correct guidance and use of folding machine in sheet metal industry is a direction of bending process improvement. And how to choose the appropriate bending equipment depends on the application of the machine and the thickness of the material and so on.