Electromagnetic bending machine is a tool that uses the equipped mold (universal or specialized mold) to bend metal sheets in a cold state into various geometric cross-sectional shapes of workpieces. It is a sheet metal forming machine designed for cold-rolled sheet metal processing, widely used in sheet metal bending processing in industries such as automobiles, aircraft manufacturing, light industry, shipbuilding, containers, elevators, railway vehicles, etc.

Precautions for using electromagnetic bending machine:

1. Strictly follow the operating procedures and wear labor protection equipment according to regulations.

2. Before starting, it is necessary to carefully check whether the motor, switch, circuit, and grounding are normal and secure, and check that all operating parts and buttons of the equipment are stuck in the correct position.

3. Check the overlap and firmness of the upper and lower molds; Check whether each positioning device meets the requirements for processing.

4. When the skateboard and all positioning axes are not at the origin, run the return to origin program.

5. After the equipment is started, it should be idle for 1-2 minutes, and the skateboard should be fully moved 2-3 times. If any abnormal sound or malfunction is found, the vehicle should be stopped immediately, the fault should be eliminated, and it can only work after it is normal.

6. During work, one person should be responsible for unified command, ensuring close cooperation between the operator and the feeding and pressing personnel, and ensuring that all cooperating personnel are in position before issuing the bending signal.

7. When bending the sheet metal, it must be compacted to prevent the sheet metal from lifting and injuring people during bending.

8. When adjusting the sheet metal pressing mold, the power must be cut off and the operation must be stopped before proceeding.

9. When changing the opening of the variable lower mold, no material is allowed to come into contact with the lower mold.

10. During work, no one is allowed to stand at the rear of the machine tool.

11. It is strictly prohibited to press the folded plate material separately at one end.

12. If the workpiece or mold is found to be misaligned during operation, the machine should be stopped for calibration. It is strictly prohibited to manually calibrate during operation to prevent hand injury.

13. It is prohibited to fold excessively thick iron plates or quenched steel plates, alloy steels, square steels, and plates that exceed the performance of the plate bending machine, in order to avoid damaging the machine tool.

14. Regularly check the overlap of the upper and lower molds; Whether the indication of the pressure gauge complies with the regulations.

15. Immediately stop the machine in case of any abnormality, investigate the cause and promptly eliminate it.

16. Before shutting down, place wooden blocks on the lower mold below the oil cylinders on both sides to lower the upper sliding plate onto the wooden blocks.

17. Exit the control system program first, and then cut off the power.

Composition of electromagnetic bending machine:

Sliding block

Sliding block part: It adopts hydraulic transmission, and the sliding block part is composed of a sliding block, an oil cylinder, and a mechanical stopper fine adjustment structure. The left and right oil cylinders are fixed on the frame, and the piston (rod) drives the slider to move up and down through hydraulic pressure. The mechanical stopper is controlled and adjusted by the numerical control system.

Workbench

Workbench section: Operated by a button box, the motor drives the material rack to move forward and backward, and the distance of movement is controlled by the CNC system, with a small reading of 0.01 millimeters (both front and rear positions have travel switch limits).

Synchronization system

Synchronization system: Unlike ordinary bending machines, this machine uses servo valves and hydraulic devices such as grating rulers to form a closed-loop circuit, thereby controlling various actions of the bending machine.

Material blocking mechanism

Material blocking mechanism: The material blocking is driven by a motor, and the two screw rods are synchronously moved through chain operation. The CNC system controls the size of the material blocking.

Electromagnetic bending machine selection knowledge:

Workpiece

An important consideration is the parts you want to produce, the key is to purchase a machine that can complete the machining task with a short worktable and small tonnage.

Carefully consider the material grade, as well as the thickness and length of the large processing. If most of the work is made of low carbon steel with a thickness of 16 gauge and a length of 10 feet, then the free bending force does not need to be greater than 50 tons. However, if engaged in large-scale bottom forming, perhaps a 150 ton machine tool should be considered. Assuming the thick material is 1/4 inch, a 10 foot free bending requires 165 tons, while a bottom die bending (corrected bending) requires at least 600 tons. If most of the workpieces are 5 feet or shorter, the tonnage is almost halved, greatly reducing the purchase cost. The length of the parts is crucial in determining the specifications of a new machine.

Scratching transformation

Under the same load, the deflection of the worktable and slider of a 10 foot machine is four times that of a 5-foot machine. This means that shorter machines require less gasket adjustment to produce qualified parts. Reducing gasket adjustments also shortens preparation time. The material grade is also a key factor. Compared to low-carbon steel, stainless steel typically requires an increase of about 50% in load, while most grades of soft aluminum require a decrease of about 50%. You can always obtain the tonnage table of the bending machine from the manufacturer, which shows the estimated tonnage required per foot length for different thicknesses and materials.

Bending radius of parts

When using free bending, the bending radius is 0.156 times the opening distance of the concave mold. During the free bending process, the opening distance of the concave mold should be 8 times the thickness of the metal material. For example, when forming low carbon steel with an opening distance of 1/2 inch, the bending radius of the part is about 0.078 inches. If the bending radius is almost as small as the material thickness, it is necessary to perform bottom concave die forming. However, the pressure required for forming with a bottom concave mold is about four times greater than that for free bending.