Proses pembuatan alat pemotong PCD
Proses pembuatan alat PCD sebagian besar terdiri dari dua tata cara:
PCD composite piece manufacturing: PCD composite piece is made of natural or synthetic diamond powder and combined agent (which contains cobalt, nickel, and other metals) according to certain combinations in high temperature (1000 ~ 2000℃), high pressure (50,000 ~ 100,000 atmospheric pressure) sintering. In the sintering process, due to the participation of the combined agent, the diamond crystals form a joint bridge with TiC, SiC, Fe, Co, and Ni as the main factors, and the diamond crystals are embedded in the framework of the joint bridge in the form of a covalent bond. The composite plate is usually made into a solid disk of diameter and thickness, and the composite plate needs to be polished by grinding and other corresponding physical and chemical treatment.
Pengolahan PCD Blade: PCD Blade mengolah bukaan meliputi langkah-langkah seperti memotong komposit, mengelas, menggiling pisau, dan lain-lain. Alat terbaik untuk mempertajam pisau PCD adalah.
Teknik pemotongan untuk komposit PCD
Proses pengolahan khusus harus dilakukan karena komposit PCD memiliki tingkat kekerasan dan daya tahan yang lebih tinggi. Saat ini, pengolahan chip komposit PCD sebagian besar menggunakan beberapa poin teknis seperti pemotongan kabel percikan listrik, pengolahan laser, pengolahan ultrasonik, aliran air bertekanan tinggi, dan lain-lain.
Perbandingan dalam proses pemotongan serbuk PCD Komposit
Pokok-Poin Proses - Ciri-ciri Proses
Pengolahan percikan listrik - tinggi kombinasi energi impuls listrik, kuatnya semburan listrik, membuat massa PCD berspekulasi logam cair, membagi grafiti dan oksidasi, membagi batu-batu Kong Kong lepas, mengolahnya dengan baik, dan efisien.
Proses ultrasonik-pengolahan yang tidak efisien, konsumsi bubuk batu king Kong, polusi debu
Pengolahan laser – tanpa las, efisien, mengolah metamorfosis, dan mengolahnya dengan kualitas yang buruk.
Dalam poin-poin pengolahan tersebut, pengolahan percikan listrik lebih baik. Keberadaan jembatan kombinasi dalam PCD membuat papan komposit percikan listrik menjadi mungkin. Dengan adanya cairan, menggunakan tegangan pulsa untuk membuat cairan yang dekat dengan logam elektroda membentuk saluran pembuangan listrik dan menimbulkan percikan api secara lokal. Suhu panas yang instan akan membuat batu polichip meleleh, sehingga membentuk segitiga, segiempat, atau persegi yang dibutuhkan untuk memotong bulu-bulu kepala. Pilihan yang tepat untuk memotong kecepatan sangat krusial, prakteknya menunjukkan peningkatan kecepatan pemotongan yang rendah kualitas pengolahan dan kualitas tampilan dipengaruhi oleh faktor-faktor seperti kecepatan pemotongan, butiran kristal PCD, ketebalan elektroda, dan kualitas elektroda, di mana pemilihan yang tepat untuk memotong sangat krusial, prakteknya menunjukkan bahwa peningkatan kecepatan pemotongan adalah kualitas pengolahan yang rendah secara tampilan, dan kecepatan pemotongan yang terlalu rendah akan menghasilkan jejak "cabe" sehingga dapat mengurangi tingkat efisiensi pemotongan. Penambahan ketebalan pisau PCD juga akan mengurangi kecepatan pemotongan.
Proses pengelasan untuk kepingan daun PCD
In addition to accepting mechanical clamping and bonding essentials, the joint essentials of the PCD composite plate and cutter body are mainly determined by brazing essentials to restrain PCD composite plate on the hard alloy matrix. The main points of welding are laser welding, vacuum diffusion welding, vacuum brazing, high-frequency sensing brazing, etc. At present, high-frequency heating brazing with low investment and low cost are widely used in PCD blade welding. In the process of blade welding, the choice of welding temperature, flux, and welding alloy will directly affect the performance of the tool after welding. In the welding process, the control of the welding temperature is very tight, if the welding temperature is too low, the welding strength is not enough. If the welding temperature is too high, PCD is prone to graphitization and may lead to "overburn", affecting the combination of PCD composite plate and carbide matrix. During the actual processing process, the welding temperature (normally less than 700℃) can be controlled according to the holding time and the depth of PCD reddening. Foreign high-frequency welding more accepts automatic welding technology, welding efficiency is high, good quality can achieve continuous production. Domestic acceptance of manual welding, lower production efficiency, quality is not ideal. Demina produces various that can use for grinding and welding technology with high production efficiency.
Proses penggiling pisau PCD
The high hardness of PCD makes its material removal rate very low (even only 10, 000 percent of the removal rate of cemented carbide). At present, PCD cutting tool grinding technology mainly adopts resin combined with a diamond grinding wheel for grinding. Because the grinding between grinding wheel abrasive and PCD is the interaction between two materials with similar hardness, the grinding discipline-specific force is huge. For high particle size and low speed grinding wheels, the adoption of water-soluble coolant can improve the grinding efficiency and accuracy of PCD. The choice of grinding wheel combination agent depends on the grinding machine example and processing conditions. Since the EDG skill is almost unaffected by the hardness of the workpiece being ground, the adoption of EDG skills in PCD has a great advantage. The grinding of some bulky PCD tools, such as woodworking tools, also has a great demand for this dynamic grinding process. With the continuous growth of EDG grinding skills, EDG skills will become a major growth bias in PCD grinding.
