What are the four techniques for surface polishing of weathering steel plates?

Nowadays, people's material living standards are getting higher and higher, and higher requirements are put forward on the quality of weathering steel plates. The following BBN will introduce you the key points of weathering steel plate grinding technology:

1. At the root, check the weathering steel plate, such as whether the weld is missing welds, weld perforations, welds are uneven in depth, welds deviate too far, partially sunken, uneven joints, deep scratches, collisions, serious Deformation, etc., if there are any above-mentioned defects in this process, they should be reworked for repair. If there are no above shortcomings, then enter the polishing process.

2. The second is rough grinding. The weathering steel plate is reciprocated on three sides with an abrasive belt to remove the solder joints left during the welding of the workpiece and the unevenness of the previous process. When the weld fillet starts to form, the horizontal and vertical surfaces There are basically no large scratches and no bumps. The roughness of weathering steel can reach R0.8mm after this process.

3. Semi-finish grinding, grinding the three sides of weathering steel according to the method of forward reciprocating grinding workpiece, mainly to correct the joints presented in the forward process, and to further finely grind the marks after rough grinding. Repeatedly grind the marks left by the process to achieve no scratches on the surface of the workpiece, and it will become bright. The surface roughness of this process can reach R0.4mm.

4. Fine grinding. The abrasive belt is mainly used to correct and grind the fine lines presented in the previous step. The grinding method is the same as the previous step. The policy adopted by this process is to completely disappear the joint between the ground part and the unground weathering steel, and the surface of the workpiece becomes brighter. The surface of the weathering steel ground by this process is completely close to the mirror surface, and the surface roughness of the workpiece can reach R0.1mm .