Tradition; Trimming knives gradually replace these traditional methods, without technical treatment, saving costs and protecting the environment.
2, chemical deburring
Based on the principle of electrochemical reaction, the parts made of metal materials are automatically and selectively deburred. It can be widely used for deburring parts such as pump body, valve body, connecting rod, plunger needle valve coupling made of different metal materials in pneumatic, hydraulic, engineering machinery, choke pump, automobile, engine and other industries. It is suitable for parts with burrs inside, which are difficult to remove by heat treatment and finishing.
3, electrolytic deburring
The electrochemical machining method of removing burrs from metal parts by electrolysis is called ECD for short. Fix the tool cathode (usually brass) near the burr part of the workpiece with a certain gap (usually 0.3 ~ 1mm). The conductive part of the tool cathode is aligned with the burr edge, and the other surface is covered with insulating layer, so that electrolysis is concentrated in the burr part. During machining, the cathode of the tool is connected to the negative pole of DC power supply, and the workpiece is connected to the positive pole of DC power supply. Low-pressure electrolyte (usually sodium nitrate or sodium chlorate aqueous solution) with a pressure of 0. 1 ~ 0.3 MPa flows between the workpiece and the cathode. When the DC power supply is turned on, the burr will be dissolved and removed by the anode and taken away by the electrolyte. Electrolyte is corrosive, and the workpiece should be cleaned and rustproof after deburring. Electrolytic deburring is suitable for deburring hidden parts or parts with complex shapes, with high production efficiency, and the deburring time usually takes only a few seconds to dozens of seconds. This method is often used to deburr gears, splines, connecting rods, valve bodies and crankshaft oil passages, as well as fillets. The disadvantage is that the parts are also electrolyzed near the burr, and the surface will lose its original luster and even affect the dimensional accuracy.
4, ultrasonic deburring
When the ultrasonic energy generated by ultrasonic waves acts on the liquid with sparse vibration, it will tear into a small cavity (that is, the inside is vacuum). When these cavities rupture, instantaneous pressure as high as several hundred atmospheres will be generated, which is called cavitation. Ultrasonic deburring is to use the instantaneous impact force of hundreds of atmospheres generated by "cavitation phenomenon" to clean the burrs attached to the parts. Ultrasonic deburring is not suitable for all burrs, mainly for some microscopic burrs. Generally, if you need to observe burrs with a microscope, you can try ultrasonic deburring. For the burr visible to the naked eye, it mainly depends on the bonding strength. Burrs with weak bonding strength can be treated by ultrasonic wave. Generally, burrs that can only be treated with tools will not be treated with ultrasonic waves. Advantages and disadvantages of ultrasonic deburring
5, high pressure water jet deburring
As the name implies, water is used as the medium to remove burrs and flash after processing by its instantaneous impact force, and at the same time achieve the purpose of cleaning. After many tests, the suitable pressure is finally determined to be 30 MPa-50 MPa. If the pressure is insufficient, the deburring effect cannot be achieved. Although excessive pressure can remove burrs, it is in danger of damaging the workpiece. Usually, the liquid pressure of hydraulic parts is within 20Mpa, and there are few burr residues that can't be knocked out with 50Mpa pressure. The probability of falling off under several MPa working pressure can also be considered as a part of the workpiece. At present, there are more and more manufacturers of high-pressure water deburring equipment, which can be simply divided into two categories: workpiece moving and nozzle moving. The movable workpiece has low cost and is suitable for deburring and cleaning simple valve bodies. Its disadvantages are that the matching degree between the nozzle and the valve body is not ideal, and the deburring effect of the horizontal hole and inclined hole on the valve body is not good. Through CNC control, the movable nozzle can effectively adjust the distance between the nozzle and the burr generating part of the valve body, and effectively correspond to the burr of the horizontal hole, the inclined hole and the blind hole in the valve body. However, due to the high cost of this equipment, so far only the heart of the car and the hydraulic control system of construction machinery can enjoy this favor.
6, thermal explosion deburring
Also known as electric heating deburring, thermal deburring is recognized by the world machinery manufacturing industry as the most advanced technology suitable for deburring small workpieces in large quantities. At present, only two domestic enterprises can produce this kind of equipment. It uses hydrogen and oxygen to mix in a closed working chamber for treating workpieces, instantly ignites and burns, and has a violent thermochemical reaction with burrs on the surface of workpieces in a very short time, thus achieving the purpose of removing burrs. Thermal deburring is a special machining technology, which has the characteristics of high efficiency, strong universality, good accessibility, uniform and thorough deburring, flat and smooth workpiece surface, and is not limited by workpiece material, shape and burr position. It is especially suitable for deburring workpieces that are difficult to deburr, such as complex cavities, cross holes, deep holes, blind holes and threaded holes. It can be used to remove burrs from non-metallic materials such as ferrous metals, non-ferrous metals and thermoplastics, and can also be used to remove burrs from metal die castings and plastic compression parts. Because of its high processing efficiency and low direct cost, it is especially suitable for large-scale continuous production environment and is an ideal and efficient processing equipment for large-scale industrial production. .
7. Freeze trimming and deburring
The flash (or burr) thickness of rubber, plastic products, zinc magnesium aluminum alloy and other products is much thinner than that of products, so the flash (or burr) embrittles faster than products. During the period when the flash (or burr) is embrittled but the product is not embrittled, the freezing deburring (trimming) machine strikes the product by throwing projectiles, thus removing the embrittled flash (or burr). Freezing deburring (trimming) machine is a special deburring (or flash) equipment that uses liquid nitrogen to quickly embrittle rubber, plastic products and zinc-magnesium-aluminum alloy flash at ultra-low temperature. In this state, the flash (or flash) of the product is hit by frozen particles sprayed at high speed, so as to remove the flash (or flash) of the product with high quality and efficiency, and keep all the physical properties of the product unchanged. It can greatly improve the precision of product trimming (deburring) and has a high degree of intensification. At present, the equipment has become an indispensable post-trimming and deburring equipment for precision rubber products and die-casting enterprises.
8. Magnetic deburring machine
Magnetic deburring machine uses its unique magnetic field distribution to produce strong and stable magnetic induction effect, which makes magnetic steel needles (imported raw materials. Semi-permanent) and the workpiece can be fully polished in all directions and angles to achieve the effects of fast rust removal, dead angle removal, burr removal, oxide film removal and sintering trace removal. Especially for workpieces with complex shapes, porous cracks, internal and external threads, etc. , can show its magical effect, and does not hurt the surface of the workpiece, does not affect the accuracy of the workpiece. Make the workpiece smooth, neat and brand-new instantly. It is suitable for grinding, polishing and deburring metal workpieces such as gold, silver, copper, aluminum, zinc, magnesium, iron and stainless steel, and nonmetal workpieces such as hard plastics.