Briefly introduce the basic procedure of mechanical polishing
Oct 25, 2022
Briefly introduce the basic procedure of mechanical polishing
In the article "Explaining the Polishing Methods of Stainless Steel Polishing", we learned that stainless steel polishing includes mechanical polishing, chemical polishing, electrolytic polishing, ultrasonic polishing, fluid polishing, magnetic abrasive polishing and other polishing methods. Zhongwei precisely found that in order to obtain high-quality polishing effects, the most important thing is to have high-quality polishing tools and accessories such as oilstone, sandpaper and diamond grinding paste. The selection of polishing program depends on the surface condition after the preliminary processing, such as mechanical processing, electrical discharge
machining, grinding, etc. The following is a brief introduction to the basic procedures of mechanical polishing by Zhongwei Precision Editor:
1. Rough polishing: The surface after milling, electric spark, grinding and other processes can be polished with a rotary surface polishing machine or an ultrasonic grinder with a speed of 35 000 - 40 000 rpm. The common methods used by metal powder injection molding manufacturers are: Φ Remove the white electric spark layer on wheels with 3mm and WA # 400. Then it is manual grinding of oilstone, and the strip oilstone is added with kerosene as lubricant or coolant. The general order of use is # 180~# 240~# 320~# 400~# 600~# 800~# 1000. To save time, ABCDPrecision chooses to start from # 400.
2. Semi fine polishing: Semi fine polishing mainly uses sandpaper and kerosene. The number of sandpaper is: # 400~# 600~# 800~# 1000~# 1200~# 1500. In fact, # 1500 abrasive paper is only used for hardening die steel (above 52HRC), not for pre hardening steel, because it may cause surface burns of pre hardening steel parts.
3. Fine polishing: diamond grinding paste is mainly used for fine polishing. Zhongwei Precision If the polishing cloth wheel is mixed with diamond grinding powder or grinding paste for grinding, the usual grinding sequence is 9 μ m （ #1800 ） ~ 6 μ m （ #3000 ） ~3 μ m （ #8000 ）。 nine μ M diamond abrasive paste and polishing cloth wheel can be used to remove hair like abrasion marks left by # 1200 and # 1500 sandpaper. Then polish with felt and diamond grinding paste, the order is 1 μ m （ #14000 ） ~ 1/2 μ m （ #60000 ） ~1/4 μ m （ #100000 ）。
ABCDprecision suggested that the precision should be within 1 μ Above m (including 1 μ m) The polishing process can be carried out in a clean polishing room in the mold processing workshop. An absolutely clean space is necessary for more precise polishing. Dust, smoke, dandruff and saliva may scrap the high-precision polished surface obtained after several hours of work.
The above is a brief summary of the basic procedures of mechanical polishing by zhongwei Precision Group, and more about other contents of metal powder injection molding technology. Welcome to consult the professional team of zhongwei Precision Metal Powder Injection Molding MIM technology to answer for you!
