Original Title: Drilling Technology Encyclopedia, This Must Be Collected! Drill, as the most common tool in hole processing, is widely used in mechanical manufacturing, especially in the processing of holes in cooling devices, tubesheets of power generation equipment and steam generators. I. Characteristics of drilling Drills usually have two main cutting edges, and when machining, the drill cuts while rotating. The rake angle of the drill is getting larger and larger from the central axis to the outer edge, the cutting speed of the drill is getting higher and higher when it is g resistance can be reduced and the cutting performance can be significantly ps and powdery chips. Key Chip Control in Drilling When the chip shape is not appropriate, the following problems will arise: ① Fine chips block the cutting edge groove, affecting the drilling accuracy, reducing the life of the drill bit, and even breaking the drill bit (such as powdery chips, fan-shaped chips,mining dth bit, etc.); ② Long chips entangle the drill bit, which hinders the operation, causing the drill bit to break or preventing the cutting fluid from ee chip breaking and chip removal effects can be improved by increasing the feed rate, intermittent feed, grinding the chisel edge, installing the chip breaker and other methods respectively or in combination, so as to eliminate the problems caused by chips. ② Professional chip-breaking drill ip-breaking drill obtains a much smoother cutting effect than the traditional drill. At the same time, the short scrap iron makes the coolant flow to the drill tip more easily,down the hole bit, which further improves the heat dissipation effect and cutting performance in the processing process. Moreover, because the new chip-breaking edge penetrates the efore a single grinding. III. Drilling accuracy l holder has a great influence on the hole diameter and the positioning accuracy of the hole, so when the tool holder is worn seriously, it should be replaced with a new one in time. When drilling a small hole, dhd drill bit ,dth hammer bit, it is difficult to measure and adjust the swing, so it is better to use a drill with a thick shank and a small edge diameter with a good coaxiality between the blade and the shank. When the regrinding drill is used for he drilled hole shape is easy to be polygonal, and the lines like rifling appear on the hole wall. Common polygonal holes are mostly triangular or pentagonal. The reason for the triangular hole is that the drill the technical requirements of the machined workpiece, whether the drill bit is used properly or not should be measured comprehensively according to the service life and machiniif the original drill is defective,overburden drilling systems, the rear shape can be properly improved and the chisel edge can be grinded according to the use purpose. Attention shall be p to damage the cutting edge during sharpening. , and remove the burrs after sharpening; 5. For cemented carbide drill bits ? ThChat public account [UG NC Programming]. You can get the tutorial after paying attention to it. Return to Sohu to see more Responsible Editor:. wt-dthtools.com
Drilling technology Daquan
