3, variety specifications In order to meet the needs of thread processing of different materials, different types and different precisions, foreign thread cutter manufacturers have continuously improved tool structure and geometric parameters and developed a large number of new products. Taking a tap as an example, there are a blade taper tap which can change the direction of chip discharge, a spiral groove tap, an extrusion tap which does not generate chips, a center hole tap which can be sprayed or an internal cooling function, and a chip-capable content. Chip taps, hexagonal neck taps with anti-break function, high-precision broaching taps, combined taps with guide post taps and front end with drilled reamers, etc., are available in a wide variety of functions and functions. There are more than 20 kinds of taps with only the coolant input hole, and the minimum specification is only φ3mm. When such a tap is used, the cooling lubricant is directly sprayed to the cutting area through the cooling hole, and the knife can be effectively prevented by lowering the temperature of the cutting zone. The formation of the tumor, at the same time facilitates the discharge of the chips from the chip flute with the cooling liquid; as the chips are cooled, the temperature influence on the workpiece can be reduced, and the quality of the surface to be processed can be improved. By using such taps to machine difficult-to-cut materials, the service life of the tap can be more than doubled. According to the 1998 EMUGE product sample statistics, EMUGE's total number of thread cutters is nearly 100,000. There are more than 200 varieties (different materials, different types) and specifications (different pitches and dimensions) of M6 taps, M6. There are more than 50 varieties of die specifications. The number of different structural taps manufactured abroad is about 30% for straight grooves, 40% for spiral grooves, 20% for screw tips, and 10% for extrusion. Developed countries not only pay attention to the development of new products for thread cutters, but also vigorously research and develop new processes for thread processing, such as: 1 rolling two-roller method with tapered, trapezoidal (including multi-head) threads and special threads; 2 using axial rolling heads and The automatic thread rolling machine automatically rolls M5~M60 external thread on the hollow blank with wall thickness of 0.8~3mm; 3 high efficiency, high precision, multi-function MC planetary tap, which can be controlled by three axes of machining center at the same time, the tap of the same pitch can be Threads of different diameters are processed, the chips are small and easy to remove, and the adjustment of the machining size can be automatically performed by the NC program. 4, processing equipment With the rapid development and wide application of microelectronics technology and computer technology, the manufacturing technology and equipment level of foreign thread cutters have undergone tremendous changes and improvement in the past decade. For example, the whole grinding process has been widely used in the manufacture of taps, and the advanced shape of the tap is used to form the shape of the tap once by high-speed grinding, high-pressure cooling, automatic operation and automatic loading and unloading, and the production efficiency is greatly improved. The fast point grinding cylindrical grinding machine produced by JUNKER of Germany adopts cubic boron nitride (CBN) grinding wheel, which can complete the first grinding including the tap tip, the blade, the neck and the handle in just 6 seconds. Need to grind the square head, just add 0.5 seconds to complete). The company also produces high-speed, high-efficiency NC and CNC grinding machines that can grind, sharpen, and grind threads. The 520CNC grinder processes a M10 tap thread in just 20 seconds. The RGB25CNC thread grinder manufactured by REISHAVER in Switzerland can directly program various taps on the machine tool, or can be connected with the computer of the design center. According to the instructions of the design center, various taps can be processed, which greatly improves the "small batch, multi-variety, short cycle. "Flexible production capacity, the delivery cycle is generally only one week, special tools can be delivered within 2-3 days. Japan's OSG has dozens of tap thread grinding machines manufactured by JUNKER, Germany; EMUGE Germany has 14 GBA machines and several RGB2510 machines manufactured by Swiss REISHAVER. On the one hand, foreign thread cutter manufacturers attach great importance to the introduction of high-precision equipment with high processing efficiency, high degree of automation and lack of high-precision equipment in the key processes (generally 3% to 5% of all equipment); Relying on technological advancement, we develop technological equipment with unique characteristics. By developing high-efficiency special equipment, computer technology is applied to special equipment, and the automation degree of special equipment is improved to meet the requirements of simple operation, convenient adjustment, and stable product quality. At the same time, the efficiency of imported equipment is maximized, and many foreign threads are used. Tool manufacturers have world-class craftsmanship and equipment. For example, Japan's OSG's self-made special equipment accounts for about 60% of all equipment, which can well meet the special needs of developing new products. 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