It is understood that the coated tool has the characteristics of high surface hardness, good wear resistance, stable chemical properties, heat resistance and oxidation resistance, low friction coefficient and low thermal conductivity. The reason is that the coating material acts as a chemical barrier and a thermal barrier, which reduces the diffusion and chemical reaction between the tool and the workpiece, thereby reducing the wear, which increases the tool life by more than 3 to 10 times and the cutting speed by 20% to 100%. It can be said that the cutting speed is increased by 20% to 100%. A thin layer of coating carries the core technology of the tool.
The new Ti-Al-XN coating technology utilizes a vapor deposition method to coat a high-strength tool substrate with a few micron high-hardness, high-wear refractory Ti-Al-XN coatings to reduce tool wear and extend life. Improve the cutting speed. It is an important achievement of the national major special projects of high-end CNC machine tools and basic manufacturing equipment.
This technology breaks the monopoly of foreign companies in the field of high-end tool coating technology, improves the localization rate of high-grade coating tools, and lays a solid foundation for key users such as automobiles and aviation to improve production efficiency and reduce production costs.
It is an indisputable fact that China is a big manufacturing country. However, there is still a gap in the technology of CNC cutting tools in China compared with foreign countries, which is highlighted in the basic research of advanced coating manufacturing and coating technology.
The successful application of Ti-Al-XN new coating technology has broken the monopoly of foreign strong enterprises in the high-end tool field, laying a solid foundation for improving the localization rate of tools, and creating conditions for better meeting the needs of key industries. Has significant economic and social benefits.
Bearing tool core technology: Machine tools are called machines that make machines. If the high-end CNC machine tool is a modern industrial civilization, then the high-end carbide precision tool is the diamond on the art, and the diamond shines from the precision coating of a few microns thick on the surface of the tool.
The coated tool has the characteristics of high surface hardness, good wear resistance, stable chemical properties, heat and oxidation resistance, low friction coefficient and low thermal conductivity. The reason is that the coating material acts as a chemical barrier and a thermal barrier, which reduces the diffusion and chemical reaction between the tool and the workpiece, thereby reducing the wear, which increases the tool life by more than 3 to 10 times and the cutting speed by 20% to 100%. It can be said that the cutting speed is increased by 20% to 100%. A thin layer of coating carries the core technology of the tool.
At present, the proportion of coated tools in cutting tools has reached 80%. Due to the monopoly position of foreign companies in the field of high-end tools, in the field of CNC machine tools in China, the position of cutting tools and their core coating technology has been paid more and more attention. Technological breakthroughs have been included in a number of research topics.
The full ceramic ball bearings listed below are supplied with rings and balls made from zirconium dioxide (ZrO2). These zirconia bearings are available as full complement (no cage) or with cages made from PTFE, PEEK or 316 stainless steel.
These are non magnetic, non-conductive and highly corrosion resistant to most chemicals although ZrO2 bearings are not recommended for prolonged contact with steam. Full complement bearings or those with a 316 stainless cage can be used up to 400°C while bearings with a PEEK or PTFE cage can cope with temperatures of up to 250°C. For temperatures below -70°C, PTFE or 316 stainless steel cages are preferred. Standard radial clearance for full ceramic bearings is C0 but other clearances can be supplied to order.
ZrO2 ceramic bearings are generally used for their extreme temperature capabilities, excellent corrosion resistance or non-magnetic properties. Other sizes can be supplied on request.
The Description of Ceramic Bearings:
Compared to steel, Ceramic ball Bearings have many specific advantages. They offer superior corrosion and heat resistance, higher dimensional stability, and lower density, which facilitate high speed. Ceramics are superior to steel in heat and corrosion resistance, and are lightweight and extremely hard as well. Consequently, ceramic rolling bearings can be used in environments where conventional steel bearings cannot. That is to say, the superiority of these bearings makes it possible that they can be applied in some special environments.
Firstly, they can be used in corrosive environments. Compared to stainless steel bearings, hybrid and all Ceramic Bearing lasted three and twenty times longer respectively. It is presumed that water readily adheres to silicon nitride and forms a better lubrication film, leading to extended bearing life.
Secondly, they can be performed in corrosive agents. Generally, silicon nitride has excellent corrosion resistance. However, corrosion resistance varies depending on the type and quantity of sintering additives, and certain corrosive agents decrease in hardness and flexural strength. In such situation, it is can be proved that the carbide-based ceramic bearings are the most effective.
Thirdly, they can be used in high-temperature vacuum. An all-silicon nitride Ball Bearing with a self-lubricating laminated cage (mainly composed of MoS2) and with MoS2-coated rings and balls proved superior in durability in a high-temperature vacuum environment. Compared with the hybrid bearings, the all-ceramic bearing was superior in both dynamic frictional torque and life.
Fourthly, they can be performed with poor lubrication. As ceramics are extremely hard and have outstanding wear resistance, they outperform other materials in bearing life without lubrication. According to a test, the steel bearing seized within a short period while the hybrid and all 627 Ceramic Bearings, though sustaining wear, did not. And the all-ceramic bearing sustained considerably less wear than the hybrid bearing, indicating that its endurance life is much longer.
Cermic Ball Bearing,Full Ceramic Bearing,Hybrid Ceramic Bearing,Self-Aligning Full Ceramic Ball Bearing
Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearings.com