Manufacturing Technology of PDC Cutter

Ⅰ. Manufacturing process of PDC cutter

The manufacturing process of PDC cutter mainly includes two stages:

1. Manufacture of PDC cutter: We are one of the most professional pdc cutter manufacturers. The PDC cutter is sintered at high temperature (1000～2000℃) and high pressure (5～100,000 atmospheres) by natural or synthetic diamond powder and binder in a certain proportion. made.

2. The processing of PDC cutter: it mainly includes the steps of cutting the composite sheet, welding the blade, and sharpening the blade.

Ⅱ. Cutting process of PDC cutter

Due to the high hardness and wear resistance of pdc tool composite sheets, special processing techniques must be adopted.

At present, the processing of PDC cutters mainly adopts several process methods such as wire electric discharge cutting, laser processing, ultrasonic processing, and high pressure water jet. Among them, EDM has better effect.

Ⅲ. Welding process of PDC cutter

In addition to mechanical clamping and bonding, the combination of PDC cutter and cutter body is mostly by brazing to press the PDC cutter on the cemented carbide substrate.

The welding methods mainly include laser welding, vacuum diffusion welding, vacuum brazing, high frequency induction brazing, etc. At present, high-frequency induction heating brazing with low investment and low cost is widely used in PDC cutter welding.

During the blade welding process, the selection of welding temperature, flux and welding alloy will directly affect the performance of the tool after welding. In the welding process, the control of welding temperature is very important. If the welding temperature is too low, the welding strength is not enough;

If the welding temperature is too high, the pdc is easily graphitized, and may lead to "overburning", which affects the combination of the PDC cutter and the cemented carbide matrix.

In the actual processing process, the welding temperature can be controlled according to the holding time and the degree of reddening of pdc (generally should be lower than 700 ℃).

Ⅳ. The sharpening process of PDC cutter

The high hardness of pdc makes its material removal rate extremely low (even only one ten thousandth of the removal rate of cemented carbide). At present, the PDC cutter sharpening process mainly uses resin-bonded diamond grinding wheels for grinding. You may also be interested in PDC cutter manufacturer and get more information.

Because the grinding between the grinding wheel abrasive and the PDC cutter is the interaction between two materials with similar hardness, the grinding law is more complicated.

For high-grain, low-speed grinding wheels, the use of water-soluble coolant can improve the grinding efficiency and grinding accuracy of pdc tools. The choice of wheel bond should depend on the type of grinder and processing conditions.

Since the electrical discharge grinding (EDG) technology is almost unaffected by the hardness of the workpiece being ground, the use of EDG technology to grind pdc tools has great advantages.

The grinding of certain complex-shaped PDC cutters for sale, such as woodworking knives, also places great demand on this flexible grinding process.

With the continuous development of EDM grinding technology, EDG technology will become a main development direction of pdc compact grinding.