Roller forming of color coated steel plate

Roller forming is a plastic processing method in which the material to be processed is successively processed into the required section shape from the plate through several groups of serial forming rollers. In the processing form, it can be said to belong to bending processing.

This processing method is suitable for mass production of long section materials such as plates for building materials, and is mostly used for the processing of plated steel plates.

The mechanical properties of materials of particular interest to roller forming are: -reduced stress-reduced point strain ® work hardening index ¯ Lankford value ° Young's coefficient, etc. Small ridges, creases and edge strain marks have become quality problems in wide-width steel used as exterior panels of buildings. In general, soft materials (yielding point and yielding strain is small) are prone to poor shape, and materials with yielding elongation properties are prone to small bulges because the yielding strain is concentrated in the bending part, so the material of the raw material must be carefully selected.

In the section shape, the distance between the rib and the rib is large, or the width of the flat part is large, it is easy to occur small bumps, so the raw materials for long size forming, the shape of the forming section, the arrangement of the roller, the roller drive mode and the setting of the shearing machine, etc., must consider the various conditions of the condition of the product to be produced and the material properties of the steel must be studied. When ordering raw materials, carefully study with raw material manufacturers in advance. At this time, if the sample steel plate can be provided to investigate the mechanical properties and raw material properties of the current steel, it will be of great help to the quality design of raw materials.

In the rolling forming process with galvanized steel plate and color coated steel plate as raw materials, special attention should be paid to the following points:

Regarding the scars, contamination and rust of the forming roll, the fine cracks in the bending processing part, the processing at low temperature, etc., and the bending processing are the same. Please refer to the cutting processing item for lubricating oil.

Roller material and surface: The roller surface, especially the part in strong contact with the steel plate, will gradually wear out after long-term use. If the material of the roller is soft, it will wear into small abrase-like marks. Such a surface state for galvanized steel plates, especially the surface of color coated steel plates, easy to bring scratches, is a very unsatisfactory state. In order to prevent such a situation, it is hoped that hard materials are used to manufacture roller wheels (for example, the use of ocean fire roller wheels, die steel, etc.). In addition, hard chromium plating on the surface of the roller wheel is also an effective method.