Introduction of Various Typical Deburring Methods

Shot blasting is a technology for removing burrs and modifying surfaces by impacting various solids (including fine ice powder and carbon dioxide gas powder), ranging from walnut powder to glass beads and iron balls, onto objects. However, due to the nature of this technology, it is not suitable for complex shapes or composite parts, as it can easily leave damage on the surface.

In addition, the shot of organic material can cause a fire and explosion, so caution is required.

In addition, with the exception of a few, the problem of blasting agents as industrial waste arises.

In many cases, a cleaning process is required as an afterthought, and it is not suitable for processing large quantities of small items in succession.

Shot blasting is the most popular deburring method used worldwide.

Barrel polishing is a widely used method for surface modification, polishing and deburring.

However, it is not suitable for metal/plastic composite parts, electronic circuit components, and parts that do not require surface modification and polishing.

Above all, one must be prepared to be highly contaminated by abrasive powders and barrel compounds. Edge corners are machined to a radius. They are not suitable for precision deburring as a result of modern precision machining techniques, such as fine blind holes, crossed holes, and deep corner. Furthermore, most of the process takes a long time to complete in a batch, making it difficult to line up.

Wastewater treatment and strong ultrasonic cleaning are generally required to finish the process.

An improved version is the magnetic barrel.

It is less polluting and does not require wastewater treatment. However, the basic features of barrel finishing are unchanged.
Basically, it is difficult to polish the inner surface of the target workpiece. Of course, it is not suitable for those with magnetic problems.

High pressure sprays above 50 MPa are difficult to secure and involve destruction of the object.

Therefore, 15 MPa to 50 MPa is the pressure of common deburring high-pressure sprayers available on the market. Some high-pressure sprayers do not use straight nozzles, but instead have fan-shaped or conical nozzles in order to secure an area, but these are not deburring, and are considered to be a spray cleaning with medium (?) pressure.

The power of high-pressure spray is high, and the power to wash away is large. However, the irradiation area for deburring with high-pressure spray is as small as 5mmΦ per nozzle, so it cannot cover a large area at the same time.

Also, as with barrel and shot blast, high-pressure spray bends and sticks a burr due to the force in one direction, making it look like the burr has been removed, which tends to make it more difficult to be removed.

Burr at the back of a small blind hole is more likely to be compacted than removed, so care must be taken.

The biggest problems with high-pressure spraying are equipment cost and safety.

This is a method of removing burrs by exploding gunpowder or gas in a sealed pressure vessel with its pressure and high heat.

It leaves an impression as a bold idea. It is mainly used to remove burrs from engine blocks and hydraulic equipment.

The idea is not to remove burrs by force, but by melting and fusing them with high heat, assuming that there is no way to remove the burrs.

The problem is that high heat burns the surface of the product, so acid cleaning, alkali neutralization, and rinse cleaning are necessary to make it a product.

Also, the targets are limited. It cannot be used for electronic parts, composite parts, rubber and plastic.

The biggest drawback is that explosives or gas control is required, which is not easy to introduce.

Price is high. Including post-processing, it can be said that it is very expensive.

The burr is removed by an electric discharge between the burr and the electrode in thick salt water and the heat of the current dissolves the burr.

This method is the last choice when there is no other means of deburring, because there are problems, such as stainless steel produces hexavalent chromium, salt water treatment, heavy metal treatment, electrode control, and above all, short equipment life due to salt.

Cold barrel is an advanced type of barrel finishing, and it removes burrs from rubber and silicon by cooling them with liquid nitrogen, hardening them, and turning them with media. Cold shot blasting is also used to harden rubber and other materials with liquid nitrogen and then hit plastic balls to remove burrs. There is a shot blasting method in which carbon dioxide gas is used to harden the balls used for the shot and then hit them. Equipment and maintenance costs are high.

One of the most widely used methods today. Mainly done manually. The quality is uneven and can be a source of finer burrs, known as secondary burrs. It is mainly performed by hand in countries with low labor costs.

An entirely new and innovative technology that is replacing existing deburring methods and is spreading around the world.
The various types of deburring that are done by hand are being replaced by this new deburring method.
​The following is a summary of the features of ultrasonic deburring.

Please feel free to contact us if you need any further information.

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