Common deburring methods in metal processing

Burrs occur during metal casting, milling, or electroplating, and debris or very fine microscopic metal particles on the surface of metal parts. The existence of burrs not only affects the appearance of the product, but also affects the assembly, performance and life of the product. With the development of high technology and the improvement of product performance, the requirements for product quality have become more and more strict, and the removal of burrs on mechanical parts has become more important.

The development of metal materials in the direction of high strength, high hardness, and high toughness, the increasing number of complex integral components in mechanical products, and the difficulty of deburring have also increased. Various new technologies and processes for mechanization and automatic deburring came into being. In order to improve the quality of the workpiece and extend the service life, burrs on all metal precision parts need to be removed.

How to remove burrs in metal processing? Here we will introduce several common methods in detail.

1. Manual deburring

Operators use tools such as files, sandpaper, and grinding heads to grind the workpiece and remove burrs. This method does not have high technical requirements for workers, and is suitable for products with small burrs and simple product structures. Therefore, it is also a deburring method commonly used by enterprises. There are two types of files: manual files and pneumatic files. The manual file is more expensive, the deburring efficiency is not very high, and it is difficult to remove complex intersecting holes.


2. Electrolytic deburring

Electrolytic deburring is an electrolytic processing method that uses electrolysis to remove burrs on metal parts. This deburring method is achieved by dissolving the anode with electrical and chemical energy. The turbine flowmeter part is connected to the positive electrode of the DC film as the anode, and the forming tool is connected to the negative electrode of the DC power source as the cathode. A gap is maintained between the two electrodes to allow the electrolyte to circulate. The disadvantage is that the vicinity of the burr of the part is also subject to electrolysis, and the surface will lose its original gloss, and even affect the dimensional accuracy.


3. Chemical deburring

Chemical deburring is the use of chemical energy for processing. Chemical methods are used to make the burrs crisp and brittle, and then use other methods to remove the burrs. Put the finished part into the metal solution, and the metal on the surface of the part will be transferred into the solution in the form of ions. These ions will adhere to the surface of the part, forming a film layer with high electrical resistance and low electrical conductivity to protect the workpiece from corrosion. The burr can be removed by chemical action because it is higher than the surface. This deburring method is widely used in pneumatic, hydraulic, engineering machinery and other fields. It performs well for difficult-to-remove internal burrs and finished parts after heat treatment.


4. High temperature deburring

Put the parts that need to be deburred into the tightly sealed chamber first, and then send the whole into a hydrogen and oxygen mixed gas with a certain pressure, ignite the mixed gas to explode, release heat, and burn the burrs of the parts without hurting parts.


5. Barrel deburring

Put the part and the abrasive into the closed drum together. During the rotation of the drum, the dynamic torque sensor, the part and the abrasive are ground together to remove burrs. Abrasives can be quartz sand, wood chips, alumina, ceramics, metal rings, and so on.


6. Ultrasonic deburring

The propagation of ultrasonic waves can also generate transient high pressure, which can be used to remove burrs on parts. This method has high accuracy and is mainly used to remove some micro-burrs that can only be observed through a m
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