Some of the major introduction of diamond core drills

First, what is the drill
Is used to drill a workpiece to drilling tools.
Drill generally just (W18Cr4V or W9Cr4V2) made of high-speed, divided twist, flat drill, center drill, countersink hole drilling, deep hole drilling, which is our twist fitter, machining the most common drill.
This is a paper I have to talk about is the main method of twist drill sharpening its restructuring. I began to talk about from the GUSHI sds hammer drill bits  twist, first introduces the basic knowledge under twist.
Twist the type and structure:
Straight shank twist drill into, Morse taper shank. Generally straight shank twist drill diameter 13mm or less in diameter Morse taper shank twist drills are in 13mm or more. Typically the twist handle, neck, working part, wherein the working portion and the guide portion, the cutting part. Specifically as shown in Figure
(A) the handle - is generally used to transfer the clamping force and a smaller diameter than Φ13 mm straight shank drill made it, no clear straight shank drill neck, the diameter of the drill, trademark etc. engraved on the handle directly. Φ13 mm and a diameter greater than generally made taper shank drills, taper shank drills taper is produced according to national standards, according to the size of the drill diameter and made Mohs 1 #, 2 #, 3 #, 4 #, 5 #, etc. taper, the larger the size of the handle numeral greater. Flat tail taper the ends for easy removal and transfer torque from the drill bit role.
(2) Neck - The neck is connected to the  GUSHI cutting disc for drill handle portion and a portion of the work, but also for the grinding wheel retraction drill is used, the diameter of the drill itself, materials and trademarks are engraved on the neck.
(3) working part - it is divided into two parts ① cutting guide and the guide portion twist to the right direction to keep working, and when re-sharpening drill bits, cutting guide portion and gradually become part and to work. The guide portion has two parallel helical grooves, is to be formed to accommodate the cutting edge and the removal of the chips and facilitate the input of the cutting fluid. There are two edges with a guide portion, its diameter is slightly inverted cone, every 100mm length, shank diameter is reduced to 0.05-0.10mm, both to guide the direction of the drill bit cutting, but also can reduce the drill hole wall friction. ② a key part of GUSHI abrasive flap wheels  the cutting portion of the drill bit, the flank twist of six, five blade consists of: a rake face comprising two, two rear flank, two sub behind the two main cutting edges, two auxiliary cutting edge , a horizontal edge, namely "a sharp three blade." As shown in Figure
Through these two points, I believe we have fully understood the basics of the drill point, so I can deeper introduce myself sharpening methods and steps up.
Twist mainly by cutting part of the cutting, but we have to start from the drill bit is also part of the transformation. Start sharpening my own way to start talking.