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The 3CD method
Deburring and polishing
Burrs occur on sharp edges, surfaces and in holes in connection with practically all types of mechanical treatment of metals. Depending on what the machined parts are to be used for, burrs lead to quality and functional problems. Thus to achieve high quality the burrs must be removed.
With the 3CD technique it is possible to remove metal with a high degree of accuracy without mechanical, chemical or thermal effects. In combination with several other valuable features, this makes the 3CD technique an interesting alternative from a technical and economic point of view.
Technology
The 3CD technique is based on Faraday’s electrolytic law of anodic dissolution of metals. The part to be deburred is connected as the anode (positive pole) in a direct current circuit together with a cathode (negative pole) in an electrolyte (electrically conductive fluid). The deburring is directly proportional to the current strength and time. It is also influenced by other parameters, like composition, concentration , flow, temperature, the conductivity of the electrolyte and the tendency of the metal to become passive (surface transformation), as well as by alignment and pulsation of the current.
Deburring and polishing non-complex parts can be performed without special tools. Parts that have more complex shapes or that have “hidden” surfaces and burrs, are processed using locally positioned auxiliary electrodes.
Electrolyte
The process works with two different electrolytes, ECF: A and ECF: C, which cover a large number of metals and alloys.
• All types of steel
• All types of stainless steel
• Aluminium
• Copper
• Bronze
Brass The electrolyte is environmentally friendly and does not smell noticeably. It contains large amounts of ammonium salt, which makes the process corrosive. Therefore the parts must be washed carefully and treated with an anticorrosion agent after deburring or polishing.
The 3CD-technique is very flexible and easy to work with. The deburring process is non-polluting. The technique can be used for manual or automatic machining.
 PDF - 3CD Method
PDF - 3CD Method - Technical Description
PDF - 3CD Process - Deeper Description
PDF - 3CD Process - Deeper Description, A3
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