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What are the classification of impact drill

by:WORKSITE     2020-06-08
1. The drill bit for metal drilling is high-speed steel, which is a black drill bit. It can be drilled on metal materials such as alloy steel, non-alloy steel, cast iron, etc. Please note that the speed should not be too high during operation, so it is easy to burn the edge of the drill. 2. The masonry drill bit is used for drilling holes in concrete materials and stone materials. The cutter head is made of cemented carbide. 3. Woodworking drills need to use woodworking drills. Woodworking drills do not require high tool hardness, and the tool material is high-speed steel. Its practical metal drilling bit can also drill wood. However, because wood is easy to generate heat and brittle chips are not easy to come out, it needs to rotate slowly when drilling, and often withdraw to remove brittle chips. 4. If you need to drill holes in high-hardness ceramic tiles or glass, you should use a ceramic tile drill bit, the tool material is tungsten-carbon alloy, and the hardness is high. When using it, pay attention to controlling the drilling speed. Precautions for use of impact drill 1. Drills of different materials are used to drill different materials. The harder the cutter, the worse the toughness, and the finer the drill, the worse the rigidity. Therefore, it is necessary to control the speed when drilling, and it is best to add appropriate cooling oil or water when drilling. Now some of the drills are coated with hard metal film, which is used to drill steel, iron, and other materials that are not heat-treated, which is easy to stick to the drill bit, so it is best to clean and lubricate the drill bit with soapy water before drilling. 2. Before using the drill, it is best to make a good eye on the material to be drilled, to prevent the drill from drifting at the beginning, causing inconvenience. 3. The black drill iron is suitable for all drills. It is occasionally used in daily life. It is recommended to reserve one at home. Maintenance and maintenance of impact electric drill bits 1. After the drill bit is used, it should be checked immediately for damage, passivation and other unfavorable patterns, if any, it should be ground and repaired immediately; 2. The drill bit should be seated when storing, so it is convenient and time-saving when it is used later, and saves the time of searching for the drill bit; 3. When drilling a through hole, when the drill bit is about to drill through, the torque is the largest, so it is necessary to enter the knife slowly with light pressure to avoid the drill bit being twisted due to excessive force; 4. The center point must be drilled before drilling, the purpose of which is to prevent the drill bit from slipping off the center and to guide the drill bit in the correct position; 5. When drilling, you should make full use of cutting and pay attention to chip removal; 6. When drilling cross holes, you should drill large-diameter holes first and then small-diameter holes; 7. When the drill bit is drilling, the phenomenon of breakage or sudden stop may be that the feed is too fast or cold and hot; 8. Drilling cracks the center of the drill bit. It may be that the clearance angle of the drill lip is too small, the feed is too fast, the drill bit is passivated, the pressure is too large, the cooling is insufficient, and the drill or workpiece is poorly sandwiched; 9. The drill bit breaks during drilling, which may be caused by the clearance angle of the drill lip being too small or the drilling speed being too high, the infeed is large or the drill bit is passivated and continues to press the cutting; 10. The cutting edge is broken when drilling, it may be that there are hard spots in the workpiece material or the feed is too fast, the drilling speed is not selected properly, and there is no simultaneous cutting during drilling; 11. The drilling hole diameter is too large, which may be due to the unequal half angle of the drill bit or the deviation of the static point and the deviation of the main shaft; 12. Only one chip is discharged during drilling, which may be the cause of the unequal length of the two cutting edges or the unequal half angle of the drill head; 13. A squeaking sound is made during drilling, which may be due to the drilling hole being not straight or the bit dull; 14. The chip properties change abnormally during drilling, which may be caused by passivation or crushing of the cutting edge.
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