Application and trend of brush deburring in powertrain parts_FAQ

Industrial brush deburring is a process of removing burrs on the surface of the workpiece by instantaneous friction between the brush disk and the workpiece to generate cutting force. For workpieces with uneven surfaces within 100mm, the existing orifices, inner holes, step edges, surroundings, and surfaces on the workpiece can be removed by using a brush deburring machine. According to the different material of the workpiece, choose different brush discs to deburr. Whether the parts need to be deburred is basically for the following purposes: to achieve the aesthetic requirements of the parts, to achieve the post-processing and assembly performance of the parts, to avoid the damage caused by the operation of the parts, and the cleanliness requirements. The formation of burrs is closely related to the following factors. Part material characteristics (such as part structure: end face, slot, cross hole,) tool performance (tool head wear) machine tool performance and processing parameters. The inspection methods for coolant burr can be divided into: tool method And visual tool method can use some sharp or thin-walled parts: fingers, fingernails, toothpicks rolled up paper pencil lead visual method can be used: directly visually observe whether the burr of the endoscope can be removed by a brush, Ecoclean recommends using a pencil to test Method for predicting, the method of pencil predicting is: use a mechanical pencil, use a 0.5mm diameter pen core, extend the pen core 10mm, facing the burr, squeeze the burr with an angle range of 30° to 60° Press, this action is just like you are writing. If the burr is squeezed and broken by the pen core but the pencil core is not broken, it can be considered that the burr is a peelable burr, that is, the burr can be removed by deburring by a brush. If the pen core is broken but the burr is not broken, then we can determine that this kind of burr is a non-peelable burr (flanging) and needs to be processed by mechanical processing. According to ECCOLEAN's experience, the brush can remove peelable burrs below 0.4mm, but if you need to consider the final cleanliness, you need to pay attention to the following points at the same time: using a wet brush to remove the burrs may bend the flanging of the dry brush Deburring will cause the following risks to cleanliness. Under the action of dry brushes, some pollutants such as brush residues, graphite residues, grease residues and coolant residues will accumulate on the inner and outer surfaces of the parts. This part of the pollutants remain on the inner and outer surfaces of the parts. It is extremely difficult to eliminate in the subsequent cleaning process, or even impossible to eliminate. If a brush (silicon carbide brush) is used in the dry brushing process, the brush residue will severely affect the wear of the high-pressure tool and even the high-pressure system in the high-pressure system of the final cleaning machine. Therefore, the author recommends an independent brush deburring station, and the following points should be noted: The wet flushing medium should use the same coolant as the processing center. The cleaning machine supplier should discuss the filtration accuracy of the flushing medium with about 100um. The temperature of the flushing medium should be adopted: 21°C (**** no more than <40°C) brush life The life of the brush will be affected by the following points: parts material, part structure and geometry, burr thickness, filament material, filament density, and the working position of the brush on the workpiece The following is the brush life of different positions according to the author's statistics: Immortal steel brush, 0.2mm diameter cast iron cylinder combustion chamber surface: about 15000-18000 pieces of cast iron cylinder body surface: about 9000-12000 pieces of cast iron cylinder block crankshaft bearing seat: about 2000 -3000 cylinder heads: Due to the improvement of the processing technology and the refinement of the process layout of the connecting rod camshaft gearbox parts, the independent brush deburring in the powertrain industry has been gradually replaced by the machining center brush. Brush deburring is often ignored by engineers in planning departments. Some engineers even think that a store can drive a brush and then use a robot to directly perform fine brush deburring. As the requirements for cleanliness of powertrain components continue to increase, and the situation of dry brushing will seriously lead to hidden dangers of cleanliness, therefore, the application of brush deburring is no longer the focus of research by washing machine companies. High-pressure water deburring The application will gradually replace the brush deburring, but because the investment budget of the high-pressure water deburring cleaning and deburring machine is generally concentrated on one or a few equipment, the high-pressure water deburring is seriously encountered when dealing with a large area of u200bu200bburr. The problem of cycle time, therefore, brush deburring will not disappear due to the popularity of high-pressure water deburring. In the process of dealing with burrs on some flange faces and end faces, brush deburring is still a low-cost method.