Four-roll sheet bending machine

Four-roll sheet bending machines with electromechanical drive model IB24 (metal bending from 5 mm to 30 mm) allow to manufacture cylindrical blanks from sheet material, which in the cold state has a yield strength of Qt = 250 MPa (25 kgf / mm sq.).

Four-roll Electromechanical rollers of the IB2415.01, IB2416, IB2420, IB2422, IB2423, IB2424 models are universal and easy-to-use equipment. After manufacturing, the products can have the shape of a closed circle or its radii. The design of this type of machines has four main rollers, while the side ones rotate both in the forward and reverse directions, move up and down, the upper one rotates in the forward and reverse directions.

The principle of operation of the machine is the free bending of the sheet, placed between the upper, side rollers and the lower roller. The end of the sheet is inserted between the upper and side rollers and the lower roller, orienting the edges of the sheet parallel to the generatrix of the roller. Then, moving the side rollers upward, they bend the sheet, as a result of which the section of the sheet under the upper roller receives plastic deformation of the bend.

When the rolls rotate, due to the friction forces between the rolls and the bent sheet, the latter moves in the direction of the rolls rotation. When passing through the deformation zone, the sections of the sheet receive a consistent, uniform along the length, residual curvature. Different installation of the side rolls in relation to the upper roll provides a change in the bending radius. Bending of the sheet to small radii is limited by the adhesion force of the driven rolls to the bent sheet, and is performed in several successive passes (passes). Bending rolls can be equipped with a numerical control system (CNC), which speeds up the control of all operations, makes it convenient and visual. To simplify work with parts of different geometries, the control panel is made remote.

Standard sheet bending machine equipment:

• Electrowelded rigid structure with base;
• Linear guides for roller movement;
• Tilting roller supports;
• High-frequency hardened rollers;
• Grounded roller surface;
• 4 independent bearings for each roller;
• Extended shafts for rings for bending of profiles;
• Two independently motorized rolls;
• Millimeter rulers for roll positioning;
• Front control panel, rotating, portable, allowing installation on the left or right side of the machine;
• Emergency stop buttons;

Additional equipment:

• Receiving table
• Front table
• Product removal mechanism
• Shell support mechanism
• CNC control kit
• Bending tool for rolled products