Galvanized steel sheet and color coated steel sheet shall be subject to shearing, blanking, piercing and trimming. The factors affecting the shearing are as follows:
(1) Mechanical properties of materials
(2) Tool shape and clearance
(3) Support conditions of materials
(4) Friction and lubrication of tool surface
(5) Processing speed and temperature
In general, the appropriae conditions
in this regard are the same as the cutting processing conditions of cold-rolled and hot-rolled steel plates. However, in the process of cutting, the following three points should be paid special attention to:
1. Try to make the burr of the cut section
If the burr of the cutting section is large, overlapping the processed steel plate or sliding on other plates will scratch other plates or make the film fall off, which will cause problems such as poor appearance or durability.
if the electric circular saw or cutting grinder is used for processing, the burr is easy to increase, so it is necessary to remove the burr after cutting.
2. Eliminate chips and metal powder during cutting
When using the cutting machine, electric
circular saw, cutting grinder and other tools, the chips and metal powder will attach to the steel plate surface. If these things are not eliminated and the steel plate is piled up, the surface of the steel plate will have scars, or it is the cause of
bad appearance or rust. Therefore, chip and metal powder need to be eliminated quickly.
3. Selection of lubricating oil
With the increase of cutting times, the cutting edge will be worn when using general cutting tools for cutting. If the
steel plate is cut by the worn tool, the cutting surface will become rough, and the burr will be increased, and even crack will be caused in serious cases. In order to reduce the tool wear and prolong the service life, lubricating oil is needed.
When cutting galvanized steel plate, the lubricant used for cutting cold-rolled steel plate and hot-rolled steel plate can also be used. However, on the color coated plate and the plastic sol coating color coated and coated steel plate, it is not allowed
to use the lubricant that will cause the film and the coating to expand, dissolve and change color. The best way to choose it is to specify the processing conditions and use, and discuss with the manufacturer.
4. Strip processing
steel coil, in addition to the original (wide) processing use, there are many occasions to be used according to the needs of the products to be processed. For example, rain gutter, ceiling beam, shutter board, c.z-shaped steel, etc. In addition, the shell
of the sound equipment can also be processed by continuous stamping with steel coils. In the process of slitting, special attention must be paid to the bending problem.