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In the automotive industry's parts processing, Super Hard Material Knives (CBN, PCD) companies focus on the machining of cylinder heads, cylinder blocks, connecting rods, camshafts and crankshafts. For the machining of engine cylinder head parts, for the cast iron and aluminum alloy materials, superhard tool companies have developed and introduced a series of CBN and PCD tools to improve the machining efficiency and tool life of the parts.
For example, a composite reaming knives for processing aluminum alloy cylinder head spark plugs has been used by auto parts manufacturers in the past for a supplier's hard alloy knives. The parts are inefficient during production and cost. high. After using the PCD tool solution, the machining efficiency has been improved by nearly 40 times and the life has increased by 3000%. The detailed parameters are shown in Table 1. With such results, customers are beginning to develop the concept of using high-performance tools to increase processing efficiency and reduce costs. 
Figure 1 The most economical double-sided face milling cutter (shown in Figure 1) in the field of general milling, with its double-sided 16 cutting edges on the blade, is the "big killer" in the field of face milling. In the face milling process of cast iron engine block, it can be applied to rough milling and finishing milling (decoration light blade) with a maximum depth of cut of 6mm. 
Figure 2 The crankshaft of a crankshaft car (see Figure 2) has always been a part of the tool consumption, and because of this, the tooling cost of crankshaft machining is strictly controlled by every manufacturer. The crankshaft milling cutters used by most customers are monolithic. If there is chip removal during processing, the cutterhead is easily damaged and scrapped. There are some state-of-the-art superhard tool manufacturers (such as Seco Tools) that offer a variety of modular (see Figure 3) or toolholder-type crankshaft milling cutters in addition to crankshaft-machined inserts. This also avoids and protects the entire cutterhead. If damage occurs, only the corresponding module or toolholder needs to be replaced. 
Figure 3 modular tool holder
Application of superhard tools in the processing of auto parts
In 2013, China's automobile production achieved rapid growth. China's auto demand continues to grow, and more foreign automakers have or are shifting production to China. At the same time, the problem of excess vehicle production capacity has always existed. With the increase of investment, the cost competition of domestic automakers has been further aggravated. At present, there is a separation between vehicle assembly and component companies, and auto companies have already implemented global sourcing. The traditional production mode of a series of parts and components is not enough to meet the needs of the current automotive industry. This also promotes the systematic and modular supply of automakers, while the production of high-volume parts also forces parts suppliers to reduce processing costs.