Processing location: above the cylinder head
Workpiece material: Alloy cast iron
Hardness: HB200-300
Processing procedure: semi precision milling
Blade: cubic boron nitride integral blade
As the heart of a car, the machining of cast iron engine components is a key technology for automobiles. One important function of the cylinder head is the engine air distribution. From the requirements of dimensional accuracy, positional accuracy, shape accuracy, and smoothness of various parts of the cylinder head, most of the surfaces and holes have low requirements and can be achieved through conventional milling, drilling, boring, twisting, and tapping methods. However, there are four difficulties. The camshaft hole and valve seat guide hole system require high precision, and it is difficult to meet the requirements using conventional machining methods. The cylinder body joint surface also has certain difficulties due to high flatness requirements and large area. In order to meet the requirements of modern processing and efficient production, corresponding solutions are also needed. Under the conditions of improving production efficiency and reducing manufacturing costs, choosing hard alloy face milling cutters can no longer meet the demand for faster machining cycles. Based on the characteristics of milling engine cylinder blocks, Zhengzhou Bote independently developed PCBN integral sintered milling cutters for semi precision machining and precision machining of cylinder block assembly surfaces, which can achieve unparalleled workpiece surface quality. The milling cutter head carrying the blade is also carefully manufactured to meet the technical requirements of high-speed dry cutting, and the processing efficiency is 5 times higher than that of coated tools. The SCGN series PCBN blade is a cast iron engine cylinder head blade independently developed by our company. It has a 7 ° rake angle to reduce friction between the rake face and the machining surface, and adjusts the sharpness and firmness of the cutting part of the tool with the rake angle, enhancing the strength of the cutting edge and improving the cutting performance of the blade.
