Precision copper processing in our daily life, we often encounter a variety of copper, mechanical parts processing, some products for copper processing technology requirements are very high, the process is not the same, for the processing of product scale is also to have a certain understanding, and then according to the sketch to make mold, so the sketch is very important, in the lamp material copper processing This material is not easy to rust, but also has a long service life. This material is not easy to be cut, and can be made into various shapes. The most important point is that it is conducive to the melting treatment of objects.
And copper alloy is easy to oxidize and change color after pickling. After pickling, copper parts can be immersed in anti tarnishing agent for several minutes, which can effectively prevent copper parts from changing color. The commonly used anti tarnishing agent is ab-712. Take 1 liter working solution as an example, take 70 ml ab-712 anti tarnishing agent, add 930 ml distilled water, stir evenly, and then use it.
BH anti discoloration agent can also be used. BH anti discoloration agent for precision copper parts processing is suitable for anti discoloration treatment of copper and copper alloy chemical polishing parts, copper plating and copper alloy (imitation gold, etc.) parts before coating, anti discoloration treatment of barrel nickel plating parts, composite anti discoloration treatment of silver plating, gold plating and electroplating imitation gold parts after electrolytic passivation, so as to improve its anti discoloration effect. It can also be used for fixation of copper and copper alloy parts after dyeing. It is a new process of chromium free, low pollution and environmental protection.
- The polishing solution does not contain chromic acid, which meets the requirements of today’s environmental protection and saves the investment of environmental protection equipment and waste water treatment costs.
- The current density of polishing is smaller than that of traditional process, so it not only has low power consumption and long service life of polishing solution, but also is more suitable for surface polishing of large aluminum and aluminum alloy parts.
- Precision copper processing has a wide range of applications. CNC machine tools are suitable for processing pure aluminum and various types of aluminum alloys with silicon content more than 2%.
Composition and operating conditions of polishing solution
Concentrated phosphoric acid (specific gravity 1.74) 70% (weight)
Yb-66 additive 30% (weight)
Precision copper processing temperature 55 – 65 ℃, the best 60 ℃
Anode current density, Da 2 – 8 A / DM2 (without stirring)
12 – 20 A / DM2 (stirring)
Voltage 10 – 15 V
Polishing time 3 – 5 minutes
Cathode material lead or stainless steel
Cathode area: anode area 2 – 3:1
