Burr is an inevitable product of metal processing, which is difficult to avoid completely. The existence of burr not only affects the appearance of the product, but also affects the assembly, service performance and service life of the product. With the development of high technology and the improvement of product performance, the requirement of product quality is more and more strict, so it is more important to remove the burr of mechanical parts.
Deburring refers to the removal of very small micro metal particles on the surface of the workpiece. These particles are called burrs. They are formed in the process of cutting, grinding, milling and other similar chip processing.
Let's introduce some common methods.
Electrolytic deburring is a kind of electrochemical machining method to remove the burr of metal parts. This deburring method is achieved by dissolving the anode with electric and chemical energy.
The turbine flowmeter parts are connected with the positive pole of the DC film as the anode, the forming tool is connected with the negative pole of the DC power supply as the cathode, and the gap between the two poles is maintained to make the electrolyte circulate. The disadvantage is that the burr near the part is also affected by electrolysis, the surface will lose its original luster, and even affect the dimensional accuracy.
Chemical deburring is to use chemical energy for processing. First, use chemical method to make the bur crisp and then deburring by other methods. Put the finished parts into the metal solution, and the metal on the surface of the parts will transfer to the solution in the form of ions.
These ions will adhere to the surface of the parts, forming a film with large resistance and small conductivity, which can protect the workpiece from corrosion. Because the burr is higher than the surface, it can be removed by chemical action. This deburring method is widely used in pneumatic, hydraulic, engineering machinery and other fields. It has a good performance for the internal burr which is difficult to remove and the parts which are finished after heat treatment.
First, put the parts to be deburred into the tight sealing chamber, then send them into the hydrogen oxygen mixture with a certain pressure as a whole, ignite to make the mixture explode, release heat, burn off the burrs of the parts, without damaging the parts.
The parts and abrasives are put into the closed cylinder together. During the rotation of the cylinder, the dynamic torque sensor, parts and abrasives produce grinding together to remove burrs. Abrasive can be quartz sand, sawdust, alumina, ceramics, metal rings and so on.
This method is more traditional and time-consuming. It is mainly polished by hand with steel file, sandpaper, grinding head and other tools. Now the most commonly used trimming knife in production, which gradually replaces these traditional methods, is more simple and convenient to use, effectively saves costs, and environmental protection.
After the ultrasonic generator is powered on, the alternating current of 50Hz will be converted into the electrical vibration of the super audio frequency, and the transducer will convert the electrical vibration of the super audio frequency into the mechanical vibration of the super audio frequency. Because the amplitude of the mechanical vibration is small, only about 4 μ M, it can not be directly used for machining, but it needs to be amplified by the horn, And the vibration is transmitted to the vibration transmission rod, which drives the super hard abrasive on it to produce longitudinal vibration, thus realizing the additional ultrasonic vibration on the super hard abrasive.
Since the amplitude at the joint (theoretically a circular line) is zero, the whole vibration system can be fixed on its shell through the joint. The disadvantage is that ultrasonic deburring is not suitable for all types. It has a good performance for the surrounding burr which cannot be observed by the naked eye, but for the burr which can be seen by the naked eye and has strong adhesion, this method is not feasible.
Saimeng tungsten carbide burr supplier is one of the leading companies in the Chinese market, specializing in the manufacture and sale of rotary tools, including diamond and carbide drills and knives, tooth polishing machines, diamond grinding discs, etc.
