A high-precision bending machine is a machine capable of bending thin plates. Its structure mainly includes a bracket, a worktable, and a clamping plate. The worktable is placed on the bracket, and the worktable consists of a base and a pressure plate. The base is connected to the clamping plate through a hinge. The base consists of a seat shell, a coil, and a cover plate. The coil is placed in a recess of the seat shell, and the top of the recess is covered with a cover plate. When in use, the coil is energized by a wire, which generates an attractive force on the pressure plate, thereby achieving the clamping of the thin plate between the pressure plate and the base.

Structural characteristics of high-precision bending machine:

1. Adopting a fully welded steel structure with sufficient strength and rigidity;

2. Hydraulic transmission, the oil cylinders at both ends of the machine tool are placed on the slider, directly driving the sliding work;

3. The slider synchronization mechanism adopts torsion axis forced synchronization;

4. Adopting a mechanical block structure, stable and reliable;

5. Quick adjustment of slider travel, manual fine-tuning, counter display;

6. A wedge type deflection compensation mechanism is used to ensure high bending accuracy.

Working principle of high-precision bending machine:

The hydraulic bending machine includes a bracket, a worktable, and a clamping plate. The worktable is placed on the bracket, and the worktable consists of a base and a pressure plate. The base is connected to the clamping plate through a hinge. The base consists of a seat shell, a coil, and a cover plate. The coil is placed in a recess of the seat shell, and the top of the recess is covered with a cover plate.

When in use, the coil is energized by a wire, which generates an attractive force on the pressure plate, thereby achieving 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 various workpiece requirements and can also process workpieces with side walls. The bending machine can meet the needs of various workpieces by replacing the bending machine mold.

Correct selection of high-precision bending machine:

If the wrong choice is made when selecting a bending machine, production costs will rise and the bending machine cannot be expected to recover costs. Therefore, there are several factors that need to be considered when making decisions.

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 (3.048 meters), then the free bending force does not need to exceed 50 tons. However, if engaged in large-scale bottom concave die forming, perhaps a 160 ton machine tool should be considered.

Assuming the thick material is 1/4 inch, a 10 foot free bending requires 200 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

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 16 gauge low carbon steel with an opening distance of 1/2 inch (0.0127 meters), the bending radius of the part is approximately 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.

Bending degree

The requirement for bending accuracy is a factor that needs to be carefully considered, and it is precisely this factor that determines whether a CNC bending machine or a manual bending machine needs to be considered. If the bending accuracy requirement is ± 1 ° and cannot be changed, attention must be paid to CNC machines.