Electrochemical deburring the use of electricity, chemical dissolving anode to remove burrs.
Parts and the positive phase of the dc power supply side as anode, forming tool is connected to the negative electrode of dc power supply for cathodic, keep some space between the poles, let the electrolyte circulation flow.
As anode and Yin after immersed in solution and ventilation with direct current (dc), the surface of the anode electrochemical reaction, the parts surface is dissolved metal and form a viscous liquid electrolyte concentration on the surface of the parts, dips, has high corrosion resistance and smaller;
But burrs on surface of parts, under the influence of temperature, liquid membrane is difficult to form, after electrify power highly focused on burr part from the cathode recently burr dissolve with the fastest speed, dissolve until the burr, the rounded edge gradually formed, which achieve the goal of deburring.
You can use the electrochemical deburring machine tools.
When the production batch is not big, the alternating current into direct current (dc) and make a simple rectifier equipment available.
According to the component structure, production and special fixture parts shape similar (
Tool cathode)
, made of brass or copper, conductive material and machining parts with epoxy resin to isolation protection.
Commonly used with NaCl electrolyte, NaNO2> and NaNO> 3 solution, etc.
This method is suitable for nonferrous, ferrous metal parts, especially suitable for the complex shape parts and used machines, manual method is difficult to remove the burr on the surface of the inner hole, cross hole and inner, can remove the hard parts such as molybdenum, nickel, titanium, quenching parts of burr.
Chemical deburring put clean metal parts in chemical solutions (
50℃）
Metal parts surface will be in the form of ions in the solution.
These ions gathered at the surface, the chemical reaction to form a layer of resistance is big, small conductivity of mucous membrane, protect the surface from corrosion, and burr at the surface, burr chemistry will be removed.
Processing, as long as a trough.
According to different deburring workpiece materials, the use of different chemical solutions.
Main ingredients can be hydrochloric acid, phosphoric acid, sulfuric acid, hydrochloric acid two aniline and water, etc. , according to the proportion.
Chemical deburring is suitable for the small metal parts, can remove the thickness less than 0.
07 mm small burrs.
High temperature deburring will need to first deburring parts on the fastening sealing indoor, and then into a certain pressure of hydrogen and oxygen mixed gas, after the spark plug, mixed gas instantaneous explosion, release a large amount of heat, the instantaneous temperature above 3300 ℃.
Due to blast a very short time, parts of burr is burnt, and the rest of the parts can not afford time to change.
Exploded, high pressure gas pervasive, all parts of the inner hole, cross hole, slot, deep hole burrs can be burned.
Need to have special high temperature deburring machine tools.
This method deburring is applicable to any structure in the shape of a metal, plastic, rubber parts, especially complex shape parts and also difficult to remove by hand burr.
Operation process, according to the different parts of materials to choose the appropriate oxyhydrogen mixture ratio (
Refers to the sealed chamber in molar mass ratio of hydrogen and oxygen)
, steel, alloy steel, copper is not sensitive to mixture, hydrogen and oxygen mixture ratio in 2:1 ~ 2:2, aluminum alloy slightly more than 2:1.
Secondly to choose inflation pressure (
The seal indoor mixture pressure)
, in general, steel, alloy steel high inflation pressure, brass, aluminum alloy is lower.
Parts before deburring, must be cleaned and dried;
After deburring, and processing in the phosphoric acid mixture, remove the oxide film.
Roll grinding deburring put a percentage of artifacts and abrasive in the closed roller, in the process of roller rotation, the generation between parts and abrasive, components and parts grinding, deburring.
Roll grinding deburring equipment have special deburring machine and centrifugal cast rolling machine.
Abrasive available, dolomite, quartz sand, sawdust, alumina, ceramics, silicon carbide, metal ring, etc.
According to the parts of material, shape and size and burr and size.
With this method, parts deformation is small, simple equipment, easy operation, wide abrasive sources, the economy is good, but the big burr is difficult to remove.
