The abbreviation of diamond composite (PDC) drill bit. It is a drilling tool commonly used in the oil drilling industry.
PDC product performance continues to improve, and the quality and type of PDC cutting teeth have changed dramatically over the past few years. If you compare the teeth of the 1980s to today's teeth, the difference is quite significant. Due to changes in mixing and manufacturing processes, today's cutting teeth have much better quality performance, making drill bits much more resistant to erosion and impact.
Engineers also optimized the interface between the tungsten carbide substrate and artificial diamond to improve the toughness of the cutting teeth. Innovations in layered diamond processes are also used to improve the product's abrasion resistance and thermal stability.
In addition to the development of materials and manufacturing processes, PDC products have also achieved major breakthroughs in tooth design technology and tooth layout. PDC products can be used in areas where they were previously unavailable, such as harder, more abrasive and variable formations. This expansion into new areas has had a significant impact on the balance between diamond (fixed cutter) drill bits and roller cone drill bits.
Initially, PDC drill bits could only be used in soft shale formations because hard interlayers would damage the drill bit. However, due to the emergence of new technologies and structural changes, PDC drill bits can be used to drill hard interlayers and long sections of hard rock formations. PDC drill bits are increasingly being used by people, especially as the quality of PDC teeth continues to improve, this situation has become more and more prominent.
Due to improvements in bit design and teeth, the orientability of PDC bits has also increased, further weakening the past advantages of roller cone bits in motor drilling. PDC bits are replacing roller cone bits in drilling applications in many formations every day.
Commonly used mechanical drill bits include straight handle twist drills (ordinary type), which can drill: 45# steel, stainless steel, and use materials with a weaker drill hardness. Alloy drills can drill Cr12 steel, and use drills with a harder hardness. Strong material. Using the professional knowledge of drill bits, you can reduce your profits.
Types of PDC drill bits
Types of drill bits for PDC drill bit control drilling machines: There are straight drill bits for printing board drilling. Twist drill bits, fixed shank twist drill bits and fixed shank spade (undercut) drill bits. Straight-shank twist drill bits are mostly used on single-head drilling machines to drill relatively simple printed boards or single panels. They are rarely seen in large circuit board manufacturers. The drilling depth can be up to 10 times the diameter of the drill bit. When the substrate stack is not high, drill bushings can be used to avoid drilling deviations.
Most manufacturers use CNC drilling machines. CNC drilling machines use carbide fixed-shank drill bits, which are characterized by automatic replacement of drill bits. The positioning accuracy is high and no drill bushing is required. Large helix angle, fast chip removal speed, suitable for high-speed cutting. Within the entire length of the chip flute, the diameter of the drill bit is an inverted cone. The friction with the hole wall during drilling is small and the drilling quality is high. Common drill shank diameters are 3.00mm and 3.175mm.
Commonly used types of drill bits
Drill bits are a must-use tool on drilling machines. There are many types of drill bits. The ones we commonly use generally include the following:
1. Twist drill is the most widely used tool among hole processing tools.
Twist drills are divided into two types: tapered shank drill bits and straight shank drill bits. Generally, drill bits with a diameter greater than 13MM are made into tapered shanks, and drill bits with a diameter less than 13MM are made into straight shanks.
2. There are two types of center drills: ordinary and with guard cone.
3. Flat drills are usually homemade according to needs and used to process hard forgings.
4. For gun drills, the working part is a semicircular rod with a flat surface in front, and the cutting edge perpendicular to the axis of the drill bit is at the end of the rod.