1. Electrolytic deburring This is the use of electrical energy, chemical energy to dissolve the anode to remove burrs. The positive electrode of the part and the DC power source is an anode, and the forming tool is connected to the cathode of the DC power source as a cathode, and a certain gap is maintained between the two poles to allow the electrolyte to circulate. When the anode and the cathode are immersed in the solution and the direct current is applied, the surface of the anode undergoes an electrochemical reaction, and the surface of the part is dissolved by the metal and the electrolyte forms a viscous liquid concentrated on the surface of the part, which has a high resistance and a small resistance. The burr protrudes from the surface of the part. Under the influence of the temperature difference, the liquid film is difficult to form. After the power is applied, the power line is highly concentrated on the burr. The burr closest to the cathode will dissolve at the fastest speed until the burr is completely dissolved, and the edge gradually forms a circle. The angle, that is, the purpose of deburring. Vane Air Winch,Air Operated Winch,Vane Pneumatic Winch,Pneumatic Tugger Winch RUDONG HONGXIN MACHINERY CO.,LTD , https://www.rdhxmfr.com
An electrolytic deburring machine can be used. When the production batch is not large, the rectifier alternating current can be converted into direct current to make a simple device. According to the structure of the part, a special fixture (tool cathode) similar in shape to the part is fabricated, and is made of a conductive material such as brass or copper, and the non-processed portion is coated with an epoxy resin for isolation protection. Commonly used electrolytes are NaCl, NaNO2> and NaNO>3.
This method is applicable to colored and ferrous metal parts. It is especially suitable for parts with complicated shapes and internal holes, cross holes and inner surface burrs which are difficult to remove by mechanical and manual methods. It can remove special hard parts such as molybdenum, nickel, titanium and quenching. The burr of the part.
2. Chemical deburring Place the cleaned metal parts in a chemical solution (50 ° C) and the metal on the surface of the part will be transferred to the solution in ionic form. These ions accumulate on the surface of the workpiece and form a layer of mucous membrane with large electrical resistance and small electrical conductivity to prevent the surface of the workpiece from being corroded, and the burr protrudes from the surface, and the chemical action will remove the burr. When processing, just one slot. Different chemical solutions are used depending on the material of the deburring workpiece. The main components of the base may be hydrochloric acid, phosphoric acid, sulfuric acid, diphenylaniline hydrochloride and water, etc., and are prepared in proportion. Chemical deburring is suitable for small metal parts and can remove fine burrs less than 0.07 mm thick.
3. High-temperature deburring first puts the parts that need to be deburred in the tight sealed chamber, and then feeds a certain pressure of hydrogen-oxygen mixed gas. After the spark plug is ignited, the mixed gas instantaneously explodes, releasing a large amount of heat, and the instantaneous temperature is up to 3 300 °C. the above. Due to the extremely short explosion time, the burrs of the parts are burned off, and the rest of the parts are too late to change. When the explosion occurs, the high-pressure gas is not perforated, and all the internal holes, intersecting holes, grooves, deep holes and the like of the parts can be burned off. A special high temperature deburring machine is required.
This method deburring is applicable to metal, plastic, rubber parts of any structural shape, especially parts with complicated shapes and difficult to remove burrs by hand. During the operation, according to the material of different parts, choose the appropriate hydrogen-oxygen mixture ratio (refer to the molar mass ratio of hydrogen and oxygen in the sealed chamber). Steel, alloy steel and copper are not sensitive to the mixture. The mixing ratio of hydrogen to oxygen is 2:1. ~2:2 range, aluminum alloy is slightly higher than 2:1. Secondly, the inflation pressure should be selected (refer to the pressure of the mixed gas in the sealed chamber). Generally speaking, the steel and alloy steel have high inflation pressure, followed by brass and aluminum alloy. Parts must be cleaned and dried before deburring; after deburring, put in a phosphoric acid mixed solution for neutralization to remove the oxide film.
4. Rolling deburring Puts a certain proportion of the workpiece and abrasive into a closed drum. During the rotation of the drum, grinding and burrs are removed between the parts and the abrasive, parts and parts. The barrel deburring device has a dedicated deburring machine and a centrifugal roller throwing machine. The abrasive can be made of quartz sand, wood chips, alumina, ceramics, dolomite, silicon carbide, metal rings, and the like. Choose according to the material, shape and size of the part, as well as the location and size of the burr.
With this method, the parts are small in deformation, simple in equipment, easy to operate, wide in abrasive source, and economical, but large burrs are difficult to remove.