Basic information on metal wire drawing and polishing
Product surface treatment process: hardware products

Brushing: Other terms: sweeping, pulling, excellent, hairline, hairline, sanding


Process: roughening → wire drawing


Effect: Long silk, short silk, snowflake silk, broken silk, (the sorting and drawing effect gradually becomes shorter, and the snowflake silk is similar to the broken silk effect). The wire drawing effect can mask the marks caused by scratches during transportation.


Consumables: sand belt, nylon belt, nylon wheel, flying wing wheel


(Sand belt: Domestic sand belt is determined by the number of mesh 36 # -800 #, while imported sand belt 1000 # -2000 #. The smaller the number, the thicker the sand belt. Conversely, the larger the number, the finer the sand belt. The sand belt number is specified as 36-40-60-80-100-120-150-180-240-320-400-600-800 #. There are various types of imported sand belts, and currently there are more 3M ones used, which are generally divided into two types: Ku cut and pyramid. Ku cut numbers are similar to domestic numbers, but the cutting force of Ku cut is much stronger and more suitable for domestic use.) Grinding; The pyramid number is A6-A16-A30-A45-A65-A80-A100-A160, and the number is not the number. For example, the number of A30 is equivalent to 18000/30=600. Compared to domestic sand belts, the drawing effect of the pyramid is more delicate and durable than the same number of domestic sand belts. But the cost is high. The sand belt interface is divided into flat joint and stacked joint: flat joint has a high cost, with an additional layer of adhesive tape underneath, which can be polished and drawn; Overlapping can only be used for polishing before polishing and cannot be used for wire drawing, as the interface affects the wire drawing effect. Our company uses flat sandbelts


(Nylon wheel: The thickness is determined by the mesh size of 60 # -1000 #. The smaller the number, the thicker the nylon wheel. Conversely, the larger the number, the finer the nylon wheel. The hardness is determined by the P-number, and the lower the p-number, the softer the nylon wheel. The 3p-12p, and the number can be determined.)



Polishing: Other terms: polishing, grinding, polishing


Process: Polishing → Clearing


Effect: matte, bright, mirror light


Consumables: rough grinding - sand belt, grinding wheel, thousand leaf wheel, sponge wheel. (The difference between abrasive belt and thousand leaf grinding wheel: the finished product of abrasive belt is high, with strong cutting force and low noise. The thousand leaf wheel is durable, with weak cutting force and high noise.)


Sponge grinding wheel: sponge+sand. Color: light gray, characteristic: particularly delicate and uniform, but high cost. The production process is complex:


Adding layers of air drying takes a long time to make a grinding wheel. Used for roughening before polishing, very delicate. For example, a 1000 # blade wheel is equivalent to a 320 # sponge grinding wheel. The sponge grinding wheel can be polished by using a 240 # tape. Bull glue bonded sand: Cloth wheel+glue+sand particles, characterized by being very delicate and low in cost, but not wear-resistant. It can consume one layer of sand in an hour and requires manual sanding, resulting in high labor costs and time consumption


Polishing - hemp wheel, thread cloth wheel, cloth wheel, wind wheel, wool wheel (wool wheel is particularly fine and can be used for products with high requirements; products made of different materials also have differences compared to the polishing wheel used)


Process after surface treatment: equivalent to protective layer effect


Electroplating, baking paint, spray painting: iron, copper, aluminum (electroplating: adding chemicals, the product becomes hard, the quality changes, the color is lighter, a very thin layer)


Oil spraying and force application: Stainless steel may not undergo post-treatment, except for products with high requirements (oil spraying: with a heavy color and can cover some defects, but the product itself has no quality change, and the requirements for the pre process of oil spraying products are not as high as those for electroplating)


Anode=oxidation: only for aluminum products, with rich colors (such as lipstick covers)