With the booming development of the automobile manufacturing industry, how to improve manufacturing efficiency and effectively reduce manufacturing costs under the premise of guaranteeing the quality of automobiles has become a focus of growing concern. Research shows that the more advanced cutting tools to replace the traditional cutting tools is regarded as an effective way to realize the automobile manufacturing cost reduction and efficiency.

In the process of automotive parts processing, the cost of hole machining and milling processing occupies most of the processing costs of the whole part. Hole machining costs remain high, one because some holes are more difficult to process, and the second is that the traditional hole machining cost control method needs to be improved. Traditional hole machining cost control is achieved by repeatedly grinding tools. However, there are three major problems in grinding: first, it is difficult to locate the tool when grinding, and the shape of the tip of the tool is easy to deviate; second, repeated grinding will lead to a smaller diameter of the drill bit; third, every time you carry out regrinding will make the drill bit shorter than its full length.

In order to solve the hole machining problems and realize cost reduction and efficiency, Zheng Drill has developed a series of special tools for difficult-to-machine holes. Take valve seat ring and catheter hole machining as an example, the precision of valve seat ring and catheter hole machining directly affects the engine power and exhaust emission indexes, Zheng Drill has developed a series of special hole machining tools such as tappet hole machining tool, spark plug hole machining tool, injector hole finishing tool, etc. It can easily realize the precision of the valve seat ring, catheter hole pressure ring and after the pressure ring, and effectively avoid the problems that plague the users such as repeated adjustment of the tool, fast wear and deformation, low machining efficiency, etc. At the same time, it can guarantee the fit clearance between the valve and seat ring to ensure that the valve and seat ring fit together. The tool can effectively avoid the problems of repeated tool adjustments, rapid wear and deformation, low machining efficiency, etc. Meanwhile, it can guarantee the fit gap between the valve and seat ring, and ensure the heat dissipation and sealing performance of the valve. The tappet hole roughing tool realizes the perfect heat shrinkage fit between the carbide drill and PCD reamer; the 3μm runout of the cutting edge ensures that the tool has a longer service life and higher machining accuracy; the integrated drilling and reaming structure design drills holes and provides accurate guidance for reaming holes; and the original piece change technology ensures that the reaming accuracy is the same as that of a new cutter, which reduces the cost of the tool without lowering the cutting quality. The shaft forward angle design of the tappet hole finishing tool reduces the axial force and makes the cutting faster; the unequal tooth pitch structure effectively avoids marks and makes the cutting smoother; and the cooling design of the tool ensures smoother chip removal.

Diamond guide bar tools for crankshaft and camshaft bore machining adopt unique guide bar structure to ensure the accuracy and stability of large L/D ratio boring, 3μm runout of the cutting edge to ensure longer tool life and higher dimensional accuracy, adjustable flange connecting structure, which is mainly applied to crankshaft and camshaft bores with high-precision machining requirements.

Smooth, flat surfaces on cylinder heads and blocks are important for proper engine operation. Automotive engine manufacturers have always been committed to controllable and predictable surface accuracy levels, as well as higher productivity, while maximizing tool life and minimizing tooling costs in the machining of each part. SDDJ drill has developed a series of aluminum-based face milling cutters for cylinder head joint milling in accordance with user needs, adopting innovative tool design thinking, which can significantly improve machining efficiency and reduce tooling costs while meeting users' machining quality requirements. Among them, the aluminum-based face milling inserts MFAC30 and MFAC31 series are suitable for machining non-ferrous metals such as aluminum and aluminum alloys, copper and copper alloys, as well as wood and plastics, and are suitable for roughing and finishing of high-efficiency face milling. The internal cooling design optimizes the chip treatment, which makes the chip discharge smoother and the machining speed higher; the machine-clamped insert clamping, the insert can be resharpened and replaced, and the cutter plate can be reused, which greatly reduces the user's tool procurement cost; the circumferential runout can be up to 0.001mm, which guarantees the precision requirements of the machined parts; the 2mm tool setting range increases the number of times the insert can be resharpened; and the wrenches can be used to adjust the position directly, which is very convenient and quick.

Another high-speed CBN indexable finishing disk milling cutter for cylinder block combined surface milling innovatively adopts the whole CBN insert, compared with the traditional alloy insert, both the life of the insert and the surface machining quality have a greater advantage. Innovative design thinking makes in the cutter itself processing a certain angle, the insert in the case of no need to rear angle can also realize cutting, so that the insert processing is simpler, the quality of the insert is more guaranteed, and the service life of the insert is extended exponentially. The blade adopts indexable design structure to ensure that the 8 corners of the square blade can be used, making the blade service life increase geometrically, and at the same time, the blade can be repetitively repaired and ground to prolong the service life of the blade and reduce the processing cost. Due to the design of CBN inserts, the cutter can maintain a higher feed and speed in the case of guaranteeing the quality of the machined surface, which doubles the surface roughness value and doubles the life of the inserts, and doubles the machining efficiency compared to alloy inserts. The innovative design concept makes the insert of the cutter disk can be adjusted in both axial and radial directions, so as to ensure that the runout of the end teeth and the runout of the outer diameter of the cutter disk can be adjusted to less than 0.005mm when the inserts are installed in the cutter disk, which can effectively ensure that each insert is subject to the same wear and tear during machining, and prolong the service life of the inserts.