The three leaf plum blossom hole support plate heat exchanger is a commonly used new type of heat exchanger equipment in nuclear power plants. There are tens of thousands of complex geometric structures and high surface roughness requirements for the three bladed holes on the support plate, and as an efficient and high-precision machining method, hobbing is very suitable for the machining of the three bladed holes on the support plate.
In the past, this type of puller could only rely on imports. For more than 30 years, we have specialized in the research and development of precision metal cutting tools, and have achieved the localization of the three bladed hole puller for the support plate of nuclear power heat exchanger tube bundles.
Technical Features
Developing a scientific heat treatment process, adjusting the machining process flow, optimizing the rough and fine machining allowance and grinding feed rate, and solving the machining difficulties of cutting tools with a length to diameter ratio of over 100;
Multiple tests have been conducted on special stainless steel materials to optimize the geometric angle of the cutting tool. The surface roughness after cutting is less than or equal to 3.2 µ m, and there are no tearing defects on the surface during visual inspection;
Made of high-quality imported high-performance high-speed steel and using advanced surface coating technology, the single service life can reach 1000 holes (with a single hole length of 30mm).