The preparation technology of Si3N4 ceramics has developed rapidly in the past few years. The preparation process mainly concentrates on reaction sintering method, hot pressing sintering method, atmospheric pressure sintering method, gas pressure sintering method, etc. Due to different preparation processes, various types of Silicon Nitride Ceramics have Different microstructures (such as porosity and pore morphology, grain morphology, intergranular morphology, and intercrystalline second phase content). Therefore, the performance varies greatly. In order to obtain Si3N4 ceramic materials with excellent performance, high-quality Si3N4 powder should be prepared first. The quality of Si3N4 powder prepared by different methods is not exactly the same, which leads to the difference in its application. The failure of many ceramic materials is often attributed to Developers do not understand the differences between various ceramic powders and have insufficient knowledge of their properties. Silicon Nitride Ceramic Shaft,Black Silicon Nitride Ceramic Shaft,Machinable Glass Ceramic Shaft,Customized Machining Silicon Nitride Ceramic Dongguan Haikun New Material Co., Ltd. , https://www.nitrideceramic.com
Drilling process for intersecting holes of machine tool box
When drilling the intersecting holes, in order to avoid the large diameter of the machined part and the axis of the intersecting hole to be drilled, the same hole as the part material is usually inserted into the machined hole before drilling the intersecting hole (see Figure 1). . In the mass production of such parts, the design of the fixture must meet the requirements of accurate positioning and fast loading and unloading of the parts, as well as saving the auxiliary materials (ie, the embedded materials in the machined holes), and the accuracy of the intersecting holes after machining. Measurements should be accurate and fast. The bench drilling machine produced by the internship factory in our hospital is a typical example.