Bevel thread is an important key to pipeline connection, especially the key issue of fluid safety in related industries such as semiconductor, biotechnology, pharmaceutical industry, food industry, etc. Therefore, the more precise the bevel thread is, the better its sealing performance is, the less filler is used, and the purity of the fluid pipeline is relatively clean. The old bevel thread processing method is generally to use an inclined milling cutter to process the bottom diameter of the bevel tube after drilling, and finally use the bevel thread tap to complete the bevel thread. This method uses 3 tools and uses relatively large power for processing. It belongs to heavy cutting processing. Especially because the current pipeline materials require high strength and acid and alkali resistance, materials above stainless steel grade are used, and the material processing heat hardening effect is more obvious. The Nine9 new bevel thread milling method uses 2 tools, first drilling, and then using an inclined milling cutter. The first cut is for rough processing and the second cut is for fine processing. Because NC program milling is used, it is accurate and labor-saving. It is a major innovation in pipelines.
