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What to Do When the Flat - End Drilling Center Hole Machine Drills at an Angle?
When the flat - end drilling center hole machine drills at an angle, the following methods can be taken to deal with it:
1. Adjust the positioning of the drill bit and the workpiece:
Ensure that the cutting edges of the drill bit are symmetrical, and the end face of the workpiece is perpendicular to the center line of the drill bit. If the drilling position is found to be offset or skewed, it can be solved by grinding the chisel edge, replacing the drill bit, or reducing the feed rate.
2. Use a guiding device:
In deep - hole processing, use a longer guide bushing or guide block to improve the guiding accuracy and reduce the skewing phenomenon caused by poor guidance.
3. Change the form of motion:** During deep - hole processing, adopt a double - rotation method in which the workpiece rotates and the tool rotates in the opposite direction and feeds, or a method in which the workpiece rotates and the tool feeds unidirectionally, which can effectively control the skewing degree of the workpiece.
4. Regular measurement and correction:** During the drilling process, regularly measure the hole deviation. If it exceeds the standard, take timely measures to correct the deviation. For example, correct the deviation by adjusting the rotation of the upper vehicle and the mast cylinder.
5. Use a stabilizer and a spiral drill rod:** Using a stabilizer and a spiral drill rod during the drilling process can increase the length of the large - diameter drilling tool, overcome the bending formed by the gap between the bottom drill rod and the hole wall, and thus reduce the drilling deviation.
6. Appropriately increase the cutting speed:** Use the flinging of the chips to promote chip removal. If the deviation is small, the workpiece or the drill shaft of the drill press can be appropriately moved for correction. If the deviation is large, use a center - punch to make a large indentation or use a chisel to chisel several grooves in the area where more material needs to be drilled away to reduce the cutting resistance in this area, so that the drill bit can be shifted to the correct position and then drill.
Through the above methods, the problem of the flat - end drilling center hole machine drilling at an angle can be effectively solved.
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