For hardware electroplated parts, grinding and polishing is a very important step. Polishing technology and polishing effect are directly related to the smoothness, roundness, porosity and brightness of electroplated coatings. Especially for the products with high surface finish, it has strict requirements for the proficiency of polishing machine, grinding wheel, polishing wax, polishing workers and inspectors.
There are polishing lines for plastic electroplated parts, copper parts and aluminum alloy parts. The polishing methods and process details of different electroplating products are very different. It needs to adopt different polishing methods for different product data, different polishing wheels, different polishing wax and wheel rotation speed, so as to obtain high plating product rate and plating layer quality.
Even if it is the same kind of material Hardware electroplating parts polishing, is not the same situation, not the same treatment. There are red copper parts, brass parts, bronze parts, stamping parts, copper casting parts and turning parts. Although they are all copper parts, their polishing methods are different.
For example, the material of the copper stamping parts is generally better, so it is better to polish the surface of the copper stamping parts, The earliest use of 320 mm or 400 mm abrasive belt grinding once, if it is a high demand mirror, then use 600 mm abrasive belt to play once, then use 25 mm hemp wheel to hit diamond white wax, and finally polish with polishing powder. Maybe use soft cloth wheel to hit Japanese white wax or green wax or OK, if it is the demand for high mirror surface, use wool wheel to hit Japanese white wax. Here, pay attention to the soft and hard hemp wheel will directly affect the oil skid of the product.
For the surface polishing of hardware electroplated parts, it is often divided into rough polishing, medium polishing, fine polishing, ultra precision polishing and super mirror polishing. In order to achieve the corresponding surface effect, what type of polishing wheel is selected? What are the characteristics of polishing wax? What kind of process parameters and process flow can be used to obtain the most useful electroplating effect with the lowest polishing cost, which is the main content of electroplated parts polishing technology.
There are many types of manual polishing machine and active polishing machine on the market. Active polishing machines such as disc polishing machine, reciprocating plane linear polishing machine, aluminum plate stainless steel plate double axis polishing machine, pipe polishing machine, etc. At present, there are more advanced active polishing equipment operated by manipulator and robot. In active polishing machine, liquid wax and special polishing wax are usually used for polishing.
The main data of the manual polishing machine are polishing wax and polishing wheel.
According to the abrasives contained in polishing wax, they can be divided into four categories
1, diatomite 2, quartz powder 3, alumina 4, chromium oxide
According to the function of polishing wax, it can be divided into five types: coarse polishing wax, medium polishing wax, fine polishing wax, super polishing wax and super mirror polishing wax.
We also used to use color to distinguish polishing wax, also known as yellow wax, purple wax, green wax, small white wax, etc.
Because of the different sizes and colors, there are no uniform sizes and colors on the market.
For example, stainless steel polishing wax is used to: palmitic acid, stearic acid, rosin adhesive, plus abrasive feldspar powder, corundum, chromium oxide, iron red, etc., and then according to different matrix composition and requirements, different fineness and varieties are made.
Therefore, how to select the appropriate polishing wax is an important step in the polishing and polishing of metal electroplating parts.
In addition to the specifications and dimensions, such as internal and external diameter, thickness, number of layers, maximum speed and rotation direction, the polishing wheels can be divided into the following categories according to their data and shapes:
- Cloth wheel
It is made of cotton cloth, white cloth, denim, colored miscellaneous cloth, etc.
The structure shape of cloth wheel includes wave type, fold type, finger type, etc. In addition, there are wind cloth wheel, plane denim cloth wheel, plane color cloth wheel, button cloth wheel, bag cloth wheel and so on.
- Hemp wheel
The hemp wheel is made of linen.
Its structural shapes are: plain pure hemp wheel, twill hemp wheel, U-wave hemp wheel, wavy hemp wheel, folded hemp wheel, wind hemp wheel, finger hemp wheel, plane cloth folder hemp wheel, fiber hemp wheel, group nail hemp wheel, etc
- Hemp rope wheel
It’s made of hemp rope. There are hemp rope wheel, hemp rope wind wheel, steel core hemp rope wheel, etc.
- Nonwoven wheel
Not only cloth wheel is made of different abrasives, man-made fibers and adhesives, but also called nylon wheel. It has nylon wheel, nylon wind wheel, various special-shaped nylon wheel.
At present, there are more businesses using alumina, silicon carbide and other abrasives and a variety of special fibers made of non-woven cloth polishing wheel, this kind of polishing wheel is suitable for the polishing and polishing of various surfaces of objects.
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