The burr is found in the process of metal casting, milling or electroplating. It is a metal particle on the surface of metal parts
. Artificial Removal of the Burrs The operator uses tools such as files, sandpaper, grinding head and so on to polish the workpiece and remove the burrs. This method need not have technical requirements for workers. It is suitable for products with small burrs and simple product structure, so it is also widly used in general enterprises to remove burrs. The file is divided into two kinds: artificial file and pneumatic file. The cost of artificial file is expensive, and the burr efficiency is not very high, and it is difficult to remove complex cross holes.
The burrs are removed by making punch. It is necessary to make rough die and fine blanking for stamping burrs, and it may be necessary to make the sizing die. This method is suitable for products with simple joint face, and the efficiency and effectiveness of removing burrs are better than the manual methods.
Grinding and deburring
Grinding and deburring is a method of removing burrs by vibration, sand blasting, roller, etc., and it is currently widely used by enterprises. The problem of grinding deburring is that sometimes it is not very clean, and may require subsequent manual processing or other way to burr. This method is suitable for small pieces with large quantities.
Removing the burrs by freezing
This is the way to embrittle the burr and jet plunge projectile to remove burrs by a sudden drop in temperature. Removing the burrs by freezing is suitable for products with small burr wall and small workpiece. The whole set of equipment is expensive, it is about RMB 2.3 million yuan.
Removing the burrs by hot detonation
Removing the burrs by hot detonation is also known as thermal burr removal and bursting. Some flammable gases are put into a furnace, then use some medium and conditions to make the gas explode instantaneously, and use the energy produced by the explosion to remove the burr. The equipment required by this method is expensive, and it usually reaches more than one million yuan, and the requirements for operation technology are also very strict. Thel efficiency of removing the burrs is low, and it also causes side effects such as rust and deformation. Removing the burrs by hot detonation is mainly used in some high-precision parts and components, such as precision parts for automobile and aerospace.
Removing the burrs by using engraving machine
The price of the equipment required to remove the burrs on the workpiece by the engraving machine is not very expensive, and usually it only costs tens of thousands of yuan. It is suitable for removing simple burrs with regular space and simple structure.
Chemical deburring is the process of automatically and selectively removing burrs from parts which made of metal materials by means of electrochemical reaction. It is suitable for internal burrs which are difficult to remove. It is especially suitable for removing small burrs on pump body and valve body.
This method is to remove burrs from metal parts by electrolysis. This method has some side effects, because the electrolyte is corrosive, and the surface near the burr is also affected by electrolysis. The surface will tarnish and even affect its dimensional accuracy. Therefore, after deburring, the workpiece should be cleaned and rust treated. This method is suitable for removing complicated burrs in the cross holes of concealed parts. Its production efficiency is high, and a single operation usually takes only a few seconds to tens of seconds. It is suitable for gear, connecting rod, valve body and crankshaft oilway orifice and Sharp corners to removing the burrs.
Removing the burrs by using high pressure water jet
This makes use of the instantaneous impact force of water to remove burrs, and at the same time, it can achieve the purpose of keeping clean. This set of equipment is expensive, and it mainly used in the car's heart part and the hydraulic control system of construction machinery.
The propagation of ultrasonic can also produce instantaneous high pressure and remove burrs on parts. The precision of this method is high and it is mainly used to remove some microscopic burrs which can only be observed by microscope.