Metallic ceramics for cutting tools began with the experimental research on TiC compounds in the 1920s. TiC-Mo-Ni metallic ceramics were used as tool materials for high-speed precision cutting of steel in the 1950s. Some excellent properties of TiC-based metallic ceramics (such as high hardness, low specific gravity and chemical stability at high temperature) made it possible to be an alternative material to WC-based hard alloys. However, at that time, TiC-based metallic ceramics were not widely used as industrial cutting tool materials, because although they had high strength and hardness comparable to hard alloys, their toughness was relatively poor.

At present, the mechanical processing can be divided into two categories according to the production batch: one is single piece, multi-variety, small batch (hereinafter referred to as small batch production); the other is less variety, large batch (hereinafter referred to as large batch production). The former accounts for about 70~80% of the total output value of mechanical processing, which is the main body of mechanical processing.　　

Drilling process of cross holes in steel parts, because of the impact at the break hole, the drill bit is prone to chipping, breaking and rapid wear.ToolAs a result, the cost is high, the efficiency is low, and the quality is also difficult to stabilize. Domestic well-known axle manufacturers have been troubled by this problem for a long time, and their products are shown in Figure 1

Ruiqing Automobile Engine Technology Co., Ltd. (hereinafter referred to as "Ruiqing Company"), located in Jiaozuo City, Henan Province, is another major project implemented by Chery Automobile in Henan after the Kaifeng base. It specializes in the research and development, as well as the production and operation of small-displacement automobile engines.

Causes of occurrence: the design value of the cutter diameter is too large or the cutter edge has burrs; the cutting speed is too high; the feed is improper or the machining allowance is too large; the main cutting edge of the cutter is too large; the cutter is bent; the cutter edge adheres to the built-up chip; the cutter edge is out of tolerance during grinding; the cutting fluid is not suitable; the surface of the cutter shaft is not wiped clean of oil or the cone surface is knocked during installation of the cutter

Turning is generally considered to be an ideal machining method for precision hole machining on workpieces of various different sizes and shapes. In order to meet the needs of increasing productivity, the design of boring tools is also continuously innovating and improving. In recent years, the technical improvements in boring tools have mainly been reflected in the following four aspects.

Tapping is a relatively difficult machining process because the tap is almost buried in the workpiece for cutting, and its cutting load per tooth is larger than that of other tools, and the tap has a large contact area with the workpiece along the thread, and it must accommodate and discharge chips when cutting the thread, so it can be said that the tap works under very harsh conditions. In order to tap smoothly, various problems that may arise should be considered in advance. Such as the performance of the workpiece material, what kind of tool and machine tool to choose, what kind of cutting speed to choose, feed rate, etc.

Thread is a continuous protrusion and groove formed on the surface of a cylindrical workpiece along a spiral line with the same cross section. In various machine and mechanical manufacturing industries, parts with threaded structures are widely used, especially trapezoidal threads. The commonly used method of thread processing is turning, and four standard threads, namely

In thread milling, three-axis linkage CNC machine and thread milling cutter are the two indispensable elements. The following introduces several common types of thread milling cutters:

Tungsten carbide end mill has many advantages, but since tungsten carbide itself is less ductile than high-speed steel, it is prone to chipping when the cutting process is not properly selected or the machine tool accuracy is poor. How to play to its strengths and avoid its weaknesses to fully play its advantages? There is a question of how to use it correctly.