The sticking problem of 5052 alloy aluminum plate occurs at the junction of the plate and the mold, which can improve the surface of both sides. On the printing plate, the surface texture treatment can be carried out to improve the surface morphology and achieve the purpose of oil storage on the plate surface. For example, by means of shot peening, electric spark and laser, the surface of finishing roller is slightly roughened (roughened) by aluminum plate manufacturer. Before the plate enters the coiler, its surface looks like a fingerprint, leaving numerous micro pits.
For stamping process, these micro pits are numerous lubricating oil tanks. The secret here is that when the board with "micro hemp shape" on the surface slides on the mold, more lubricating oil can follow into the deformation area; the greater the contact pressure in the deformation area, the more lubricating oil extruded from the micro reservoir. If the surface of the finishing roller is not slightly roughened, or if the use time is too long to make the surface of the roughening roller smooth, the oil carrying capacity will decrease. After entering the deformation zone, when lubricating oil is needed to reduce friction, no oil is available and viscosity type problems will occur.
After phosphating the surface of the galvanized aluminum alloy plate, the zinc phosphate conversion film on the outer layer is observed under the microscope, which is like a porous slotted sponge, providing a large number of hiding places for lubricating oil. When lubricating oil is needed, it can be extruded by high contact pressure in deformation area.
It is also a good way to precoat the surface of 5052 alloy aluminum plate with dry lubricant. The so-called dry lubricating oil is a kind of high viscosity lubricating oil, which is composed of rollers in front of the plate and wax at room temperature. The dry lubricant is really a good thing, which can effectively isolate the contact between the sheet metal and the surface of the mold, greatly reducing the friction. The people who draw the tube like it.
The dry lubricant also has the disadvantage of poor fluidity. The lubricant is not easy to run to one side of the punching and trimming die. The die has no oil film protection, and the shear debris is easy to accumulate on it, which leads to the problem (wear) of the cutting die. There is no problem with the lubricating oil used to pull out the shallow layer of the original alloy aluminum plate. Every time the material is dropped, a little splashed lubricating oil is enough to wet one side of the punch. In order to solve the wear problem of punching die, it is necessary to polish and PVD coat the side of punching die.
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