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Six common methods for removing burrs in metal processing

Burrs are inevitable products of metal processing and are difficult to avoid completely. The presence of burrs not only affects the appearance of the product, but also affects the assembly, serviceability and longevity of the product. With the development of high technology and the improvement of product performance, the requirements for product quality are becoming more and more strict, and the burr of removing mechanical parts is becoming more and more important.

 

Deburring refers to the removal of very fine microscopic metal particles on the surface of the workpiece. These particles are called burrs. They are formed during cutting, grinding, milling and other similar chip processing.

 

The development of metal materials in the direction of high strength, high hardness, high toughness, the increasing number of complex integral components in mechanical products, the difficulty of deburring, and the traditional manual deburring operation is difficult to meet the requirements of the development of deburring. Various mechanized and automated deburring new technologies and new processes have emerged. To improve the quality of the workpiece and extend its service life, it is necessary to remove the burrs on all metal precision parts. The surface, sharp corners and edges of the workpiece must be extremely clean and, if necessary, must be suitable for electroless plating and electroplating.

 

How to remove burrs from part processing? Below we will introduce several common methods.

 

Traditional processes for deburring are mechanical processes such as grinding, polishing, and other processes with varying degrees of automation. The quality of the workpiece being processed is often not guaranteed; production costs and personnel costs are very high.

 

1, electrolytic deburring

 

Electrolytic deburring is an electrolytic processing method that uses electrolysis to remove burrs of metal parts. This method of deburring is achieved by means of electrical energy and chemical energy to dissolve the anode. The turbine flowmeter component is connected to the anode of the DC film as an anode, and the forming tool is connected to the cathode of the DC power source as a cathode, and a gap is maintained between the two poles to allow the electrolyte to circulate. The disadvantage is that the vicinity of the burr of the part is also subjected to electrolysis, and the surface will lose its original luster and even affect the dimensional accuracy.

 

2, chemical deburring

 

Chemical deburring is the use of chemical energy for processing, chemical methods to first make the burr crisp, brittle, and then use other methods to remove the burr. Place the finished part into the metal solution and the metal on the surface of the part will be transferred to the solution in ionic form. These ions adhere to the surface of the part, forming a film with large electrical resistance and low electrical conductivity, protecting the workpiece from corrosion, and the burr can remove the burr by chemical action because it is higher than the surface. This method of deburring is widely used in the fields of pneumatics, hydraulics, engineering machinery and the like. Good performance for hard-to-remove internal burrs and heat-treated parts.

 

3, high temperature deburring

 

First, the parts that need to be deburred are placed in a tight sealed chamber, and then the whole is sent into a hydrogen-oxygen mixed gas with a certain pressure. The ignition causes the mixed gas to explode, releasing heat, and burning the burrs of the parts without damaging. And parts.

 

4, barrel deburring

 

The parts are placed in a closed drum together with the abrasive. During the rotation of the drum, the dynamic torque sensor, the parts and the abrasive are ground together to remove the burrs. The abrasive can be made of quartz sand, wood chips, alumina, ceramics, metal rings, and the like.

 

5, manual deburring

 

This method is more time-consuming and laborious than the traditional one. It is mainly polished by manual tools such as steel shovel, sandpaper and grinding head. Nowadays, the most commonly used in the production is the trimming knife, which gradually replaces these traditional methods, which is simpler and more convenient to use, saves cost and is environmentally friendly.

 

6, ultrasonic deburring

 

After the ultrasonic generator is energized, the 50HZ alternating current is converted into the ultrasonic frequency electrical oscillation, and the transducer converts the ultrasonic frequency electrical oscillation into the ultrasonic frequency mechanical vibration. Since the amplitude of the mechanical vibration is small, only about 4 μm, It is directly used for machining, and the amplitude is amplified by the horn, and the vibration is transmitted to the vibration transmission rod, and the super-abrasive material thereon is driven to generate longitudinal vibration, thereby realizing ultrasonic vibration on the super-hard abrasive. Since the amplitude of the node (theoretically a circumferential line) is zero, the entire vibration system can be fixed to its outer casing by the node. The disadvantage is that ultrasonic deburring is not suitable for all types. It is good for onlookers that are not visible to the naked eye, but it is not feasible for macroscopic, cohesive burrs.


Contact Us
Shandong Jining Qingfeng Machinery Hardware Co.,Ltd

Address: NO.47 Jinyu Road, Jining, Shandong

Tel: +86-537-3281595

Fax: +86-537-3281597

E-mail: info@qfmh.com

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