In the next five years, the specialty alloy tool profession will usher in its high-speed development period, and China's tool industry faces a period of transition from low-end products to high-end products. The high, precise and sharp messy tools of the automobile, mold, aerospace and other occupations will be the primary direction of production of modern high-efficiency tools in China. The production of modern high-end tools will be a major highlight of professional production, and it is one of the important codes for China's tool companies to enter the global shopping malls in the future.

The cutting of special alloy tools is not only scattered on the tool itself, but also closely related to the use of machine tools, the connection of tools and machine tools, the tool holder system, the dynamic balance of the tool, the tool safety monitoring system, etc., and the skills associated with the tool are also related to the tool. Together with the advancement of science and technology, the skills have achieved new developments.

1. Tool holder system for high speed cutting

CNC machine tools such as machining intermediates have always used the traditional 7:24 solid taper shank system. Because of the cone-like contact, the shank and the spindle have low coupling rigidity, and the spindle speed exceeds 10000r/min. The lack is more significant. For the selection of the ATC tool holder, the radial dimension of the tool may change after each tool change, and there is a problem of low repeatability. In order to deal with these problems, the specification of the 7:24 tool holder is improved. Inspired by the HSK tool holders, these years have presented a new connection skill of 7:24 shank. For example, today's research company and the company show that there are three touches (3LOCKSYSTEM) and two sides (BIGPLUS). 24 joint holders. Compared with the standard 7:24 holders, they have higher joint rigidity and precision, can be used for high-speed, high-efficiency cutting, and are compatible with existing 7:24 holders or machine tools, which are 7:24 holders in the future. In the direction of development, in addition to the modification of the specification 7:24 shank layout, the new HSK shank and KM shank were selected first.

The HSK shank is a new type of high-speed tapered special alloy shank. The interface is selected by the combination of the tapered surface and the end surface. The shank is medium-sized and the length of the cone is short, which is beneficial to the lightening of the tool change. And high-speed, because the choice of end face positioning, completely eliminate the axial positioning error, so that high-speed, high-precision machining is possible is also the direction of our domestic production plant tool production. The joint skills of high-speed tools and spindles will continue to develop in the future, and some new concept holders - HSK, KM, 3LOCK, BIGPLUS and other tool holders will be further improved and improved. At that time, the direction of the joint between the spindle and the tool was:

(1) Select double-sided positioning system;

(2) High clamping precision, good clamping rigidity and compact layout;

(3) the handle with balance and vibration damping equipment;

(4) Develop multifunctional and intelligent tool holders.

Second, the tool dynamic balance skills

There are balance and safety problems for high-speed rotating tools. In the high-speed spindle system, the centrifugal force is generated by the imbalance of any rotating body. The centrifugal force generated by the unbalanced tool or the tool holder during high-speed cutting causes the machine to oscillate, and the rotating tool is small. The unbalanced amount will form a large centrifugal force during high-speed cutting, and the irregular cutting force generated by the tool imbalance will cause irregular wear, and the result will affect the machining accuracy and surface quality of the workpiece on the other hand. Affect the service life of spindle bearings and tools, and more importantly, affect the safety of high-speed cutting. Therefore, high-speed cutting requires careful balancing of the tool.

At that time, foreign companies developed a special tool dynamic balance meter according to the demand of tool dynamic balance. HAIMER of Germany and CEMB of Italy introduced a vertical tool dynamic balance meter, which can complete the automatic tool balance measurement. The new dynamic balance measuring instrument is developed in the direction of accurate, efficient, convenient operation and powerful functions.

Third, the development of cutting edge passivation

At that time, most of the cutters imported from abroad or the edge of the indexable insert were mostly passivated. The passivated tool or blade edge micro-defects are completely removed, effectively increasing the edge strength, and the tool durability can usually be improved by 20% to double. At that time, only a small number of companies such as Xiamen Golden Heron Special Alloy Co., Ltd. The cutting edge of the tool was passivated, while most other tools were not passivated. The durability was low and the tool cost was high. Therefore, the passivation of the cutting edge of the tool was a direction for the tool making in China.