A sheet metal bending machine is a machine that can bend 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 is composed 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.

Proper selection of sheet metal 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.

Working principle of sheet metal 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.

Maintenance and upkeep of sheet metal bending machine:

Before performing machine maintenance or cleaning, the upper mold should be aligned with the lower mold and the machine should be lowered and turned off until the work is completed. If startup or other operations are required, the mode should be selected as manual and ensured. The maintenance content is as follows:

1. Hydraulic oil circuit

1) Check the oil level in the fuel tank every week, and also check it after hydraulic system maintenance. If the oil level is below the oil window, add hydraulic oil;

2) The hydraulic oil used in this machine is ISO HM46 or MOBIL DTE25;

3) The new machine should have its oil changed after 2000 hours of operation, and every 4000-6000 hours of operation thereafter. After each oil change, the oil tank should be cleaned;

4) The system oil temperature should be between 35 ℃ and 60 ℃, and should not exceed 70 ℃. If it is too high, it may cause deterioration and damage to the oil quality and accessories.

2. Filter

1) The filter should be replaced or thoroughly cleaned every time the oil is changed;

2) If the machine tool has related alarms or other filter abnormalities such as poor oil quality, it should be replaced;

3) The air filter on the fuel tank should be inspected and cleaned every 3 months and replaced every 1 year.

3. Hydraulic components

1) Clean hydraulic components (substrates, valves, motors, pumps, oil pipes, etc.) monthly to prevent dirt from entering the system and avoid using cleaning agents;

2) After using the new machine for one month, check if there is any deformation at the bends of each oil pipe. If there is any abnormality, it should be replaced. After using it for two months, tighten all the connections of the accessories. When doing this work, the machine should be turned off and the system should be free of pressure.