1. Electrolytic deburring This is the use of electricity, chemical dissolved anode to remove burrs. The anode of the part and the positive pole of the DC power supply are connected to the negative pole of the forming tool and the DC power source, and a certain gap is maintained between the two poles to allow the electrolyte to circulate and flow. When the anode and cathode immersed in the solution and through the DC, the electrochemical reaction of the anode surface, the surface of the part is dissolved metal and electrolyte to form a viscous liquid concentrated in the concave surface of the parts, with higher resistance and smaller The burr protrudes from the surface of the part. Under the influence of the temperature difference, the liquid film is hard to form. After the power is turned on, the power line is highly concentrated. The burr near the cathode of the burr part will be dissolved at the fastest speed until the burr is completely dissolved and the edge gradually forms a circle Angle, that is to achieve the purpose of deburring. Electrolytic deburring machine can be used. When the production volume is not large, the available rectifier AC into DC and made of simple equipment. According to the structure of the parts, a special fixture (tool cathode) similar to the shape of the part is made, made of conductive material such as brass or copper, and the unprocessed parts are coated with epoxy resin for isolation and protection. Commonly used electrolyte NaCl, NaNO2> and NaNO> 3 and other solutions. This method is suitable for non-ferrous and ferrous metal parts. It is especially suitable for burrs with complex shapes and inner holes, cross holes and inner surfaces that are difficult to remove by mechanical and manual methods. It can remove special hard parts such as molybdenum, nickel, titanium, Parts of the burr. 2. Chemical Deburring Place cleaned metal parts of the gear pump in a chemical solution (50 ° C) and the metal on the part surface will be transferred to the solution as ions. These ions accumulate on the surface of the workpiece, the chemical reaction to form a layer of large resistance, low conductivity mucous membrane to protect the workpiece surface is not corroded, and burrs protrude from the surface, the chemical will remove the burr. Processing, as long as a tank can be. Depending on the material of the deburring workpiece, use a different chemical solution. The main components of the base can be hydrochloric acid, phosphoric acid, sulfuric acid, hydrochloric acid diyl aniline and water, formulated in proportion. Chemical deburring is suitable for small metal parts and can remove small burrs of less than 0.07 mm in thickness. 3. Deburring at high temperature The parts of the gear pump that need deburring are placed in the tight sealed room first, and then a certain pressure of hydrogen and oxygen mixed gas is ignited. After the ignition of the spark plug, the mixed gas instantaneously explodes, releasing a large amount of heat and the instantaneous temperature is up to 3 300 ℃ above. Due to the very short explosion time, the burr of the part is burned out and the rest of the part is too late for change. Explosion, high pressure gas all-pervasive, all parts of the hole, cross hole, slot, deep hole burr can be burned. Need to have a dedicated high-temperature deburring machine. This method deburring applicable to any structural shape of metal, plastic, rubber parts, in particular, the shape of complex and difficult to use manual deburring parts. During operation, according to different gear pump parts choose the appropriate mixture of hydrogen and oxygen (referring to the molar mass ratio of hydrogen and oxygen in the sealed chamber), steel, alloy steel, copper is not sensitive to the mixture, the hydrogen and oxygen mixing ratio of 2 : 1 ~ 2: 2 range can be slightly higher than 2: 1 aluminum alloy. Followed by the choice of inflation pressure (referring to the sealed chamber mixture pressure), in general, steel, alloy steel inflatable pressure, followed by brass, aluminum alloy lower. Before deburring, the parts must be cleaned and dried; after deburring, they are neutralized in phosphoric acid mixed solution to remove the oxide film. 4. Barrel deburring a certain percentage of the workpiece and abrasive into a closed drum, the drum rotation process, parts and abrasives, gear pump parts and parts between the grinding, removal of burrs. Barrel deburring equipment has a special deburring machine and centrifugal roller polishing machine. Abrasive available quartz sand, sawdust, alumina, ceramics, dolomite, silicon carbide, metal rings and so on. According to the parts of the material, shape and size, as well as the location and size of the burr and so on. With this method, parts deformation small, simple equipment, easy operation, wide source of abrasive, economical, but difficult to remove large glitches.
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