Burs are ubiquitous in the metalworking process. No matter how advanced and sophisticated equipment you use, it will be born with the product. This is mainly due to the plastic deformation of the material and the generation of excessive iron filings at the edges of the processed material, especially for materials with good ductility or toughness, which are particularly prone to burrs.
The types of burrs mainly include flash burrs, sharp corner burrs, spatters, etc., which are protruding excess metal residues that do not meet product design requirements. For this problem, there is currently no effective way to eliminate it in the production process, so in order to ensure the design requirements of the product, engineers have to work hard to eliminate it later. So far, there have been many different deburring methods and equipment for different steel pipe products (eg seamless tubes).
The seamless tube manufacturer has sorted out the 10 most commonly used deburring methods for you:
1) Manual deburring
This is also a commonly used method in general enterprises, using files, sandpaper, grinding heads, etc. as auxiliary tools. There are manual files and pneumatic interleavers.
Comment: The labor cost is relatively expensive, the efficiency is not very high, and the complex cross holes are difficult to remove. The technical requirements for workers are not very high, and it is suitable for products with small burrs and simple product structure.
2) Die deburring
Burrs are deburred using production dies and punches.
Comments: A certain mold (rough mold + fine mold) production fee is required, and a forming mold may also be required. It is suitable for products with simpler parting surfaces, and its efficiency and deburring effect are better than those of manual work.
3) Grinding and deburring
This type of deburring includes vibration, sandblasting, rollers, etc., and is currently used by many companies.
Brief comment: There is a problem that the removal is not very clean, and subsequent manual processing of residual burrs or other deburring methods may be required. Suitable for small products in large quantities.
4) Freeze deburring
The burrs are quickly embrittled using cooling and then blasted with projectiles to remove the burrs.
Brief comment: The price of the equipment is around 200,000 or 300,000; it is suitable for products with small burr wall thickness and small products.
5) Hot air deburring
Also known as thermal deburring, explosion deburring. By introducing some flammable gas into the equipment furnace, and then through the action of some media and conditions, the gas will explode instantly, and the energy generated by the explosion will be used to dissolve and remove the burrs.
Brief comment: The equipment is expensive (millions of dollars), with high technical requirements for operation, low efficiency, and side effects (rusting, deformation); it is mainly used for some high-precision parts, such as automobile and aerospace precision parts.
6) Deburring of engraving machine
Brief comment: The price of the equipment is not very expensive (tens of thousands), it is suitable for simple space structure, and the required deburring position is simple and rules.
7) Chemical deburring
Using the principle of electrochemical reaction, parts made of metal materials can be automatically and selectively deburred.
Brief comment: It is suitable for internal burrs that are difficult to remove, and suitable for small burrs (thickness less than 7 wires) of products such as pump bodies and valve bodies.
8) Electrolytic deburring
An electrolytic machining method that uses electrolysis to remove burrs from metal parts.
Comment: The electrolyte is corrosive to a certain extent, and electrolysis also occurs near the burr of the parts, the surface will lose its original luster, and even affect the dimensional accuracy. The workpiece should be cleaned and rust-proof after deburring. Electrolytic deburring is suitable for deburring hidden parts of intersecting holes or parts with complex shapes. The production efficiency is high, and the deburring time is generally only a few seconds to tens of seconds. It is suitable for deburring gears, connecting rods, valve bodies and crankshaft oil passages, etc., as well as rounding of sharp corners.
9) High pressure water jet deburring
Using water as the medium, the instantaneous impact force is used to remove the burrs and flashes generated after processing, and at the same time achieve the purpose of cleaning.
Brief comment: The equipment is expensive and is mainly used in the heart of automobiles and hydraulic control systems of construction machinery.
10) Ultrasonic deburring
Ultrasonic produces instant high pressure to remove burrs.
Comment: mainly for some microscopic burrs. Generally, if you need to observe the burr with a microscope, you can try to remove it with ultrasonic waves.