The effect of excessive bending of the drill pipe
If the drill pipe is bent too much, the drill bit may be broken or the guide block may be picked up when the drill bit is fed into the drill sleeve before drilling, or the center line of the drill bit may be offset from the center line of the workpiece during the drilling process. The tip of the tool is subjected to the upward thrust of the contact workpiece. Since there is no cutting edge under the cutting edge and the blade is lifted, in the case of feeding, the tip portion is subjected to a larger force, and the blade is broken.
The bending of the rod should be controlled within 1 mm. When the drill bit is installed on the drill pipe, the long-term wear will make the positioning part between the two parts out of tolerance, and the drill pipe will not position the drill bit, causing the yaw when the drill bit is drilled, resulting in severe vibration, resulting in the knife . In order to make the drill bit stably enter the workpiece, the mounting position of the guide sleeve in the oil feeder cannot be in a floating state. The gap between the guide sleeve and the end face of the workpiece is controlled below 1~2mm, and the contact with the rubber gasket is optimal, which can ensure the guiding effect of the guiding sleeve. Due to long-term wear and tear, the diameter of the guide sleeve increases, and the gap between the guide sleeve and the drill bit increases, so that the drill bit does not guide. For this purpose, the gap between the outer diameter of the drill bit and the guide sleeve should be controlled within a range of 0.005 mm. It is stipulated that the outer surface of the roughing car should be less than 1mm, and the outer surface of the finished car should be less than 0.5mm. The end face should be less than 0.05mm and the residual core diameter should be reduced from 5mm to 2mm. A subsequent process creates favorable positioning conditions and attractive conditions. (Finish)
Specialty Magnets Assemblies,United States Magnets,Wholesale Magnetic Signs,Magnetic Specialities Inc
Dongguan Zhenglong Magnet Co., Ltd , https://www.zlmagent.com