Methods for removing metal burrs in CNC machining of CNC parts
Burrs are produced when metal is cast, milled or electroplated, and there are residues or extremely fine microscopic metal particles on the surface of metal parts. The appearance of burrs will greatly reduce the quality standards of metal workpieces, so try to avoid or remove some burrs. The simplest method of deburring is as follows. The following CNC precision machining parts manufacturers will introduce to you.
1. Manual deburring
Operators use files, sandpaper, grinding heads and other tools to polish 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. Hand filing is more expensive, the deburring efficiency is not very high, and complex cross holes are difficult to remove.
2. Mold deburring
Burrs are removed by making molds and punches. Mold deburring requires a certain manufacturing cost for both rough and fine molds, and may also require the production of forming molds. It is suitable for products with relatively simple parting surfaces, and the efficiency and effect of deburring are better than manual methods.
3. Polish and remove burrs
Grinding and deburring is a method of removing burrs through vibration, sandblasting, rollers, etc., and is currently widely used by companies. The problem with polishing and deburring is that sometimes the removal is not very clean, and subsequent manual processing or other methods of deburring may be required. This method is suitable for large quantities of small products.
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4. Frozen deburring
This is a method that uses a sudden drop in temperature to quickly embrittle the burrs, and then sprays projectiles to remove the burrs. Frozen deburring is suitable for products with smaller burr wall thickness and smaller workpieces. The price of the whole set of equipment is not low, about RMB 2.3 million.
5. Thermal deburring
Thermal explosion deburring is also called thermal deburring and explosion deburring. This is to introduce some easy-to-generate gases into the equipment furnace, and then cause the gas to explode instantly through the action of certain media and conditions, and use the energy generated by the explosion to dissolve and remove burrs. The equipment required for this method is expensive, usually costing more than 10,000 yuan, and the requirements for operating technology are also very high. Deburring is inefficient and can lead to side effects such as rust and deformation. Thermal explosion deburring is mainly used for some high-precision parts, such as automobiles, aerospace and other precision parts.
6. Engraving machine deburring
Burrs on the workpiece are removed by an engraving machine. The equipment is not very expensive, usually only tens of thousands of yuan. It is suitable for removing burrs with simple spatial structure and simple and regular positions.
7. Chemical deburring
Chemical deburring is a process that uses the principle of electrochemical reaction to automatically and selectively remove burrs from metal parts. It is suitable for internal burrs that are difficult to remove, especially for removing small burrs on pump bodies, valve bodies and other products.
8. Electrolytic deburring
A method of electrolytically removing burrs from CNC machined parts. This method will bring certain side effects, because the electrolyte is corrosive, the burrs will be electrolyzed near the surface, the surface will lose luster, and even affect the dimensional accuracy. Therefore, the workpiece should be cleaned and rust-proofed after electrolytic deburring. This method is suitable for removing burrs in hidden holes of parts or burrs with complex shapes. The production efficiency is high, and one operation usually only takes a few seconds to dozens of seconds. Suitable for deburring gears, connecting rods, valve bodies and crankshaft oil passage openings, as well as rounding sharp corners.
