It is reflected in the hole processing, which can make the processing diameter range wider. The introduction of several multi-functional tools is in line with the needs of composite processing. Such as modular quick-change cutting units for turning-milling machining centers; and multi-tool holders for turning, drilling, milling and threading, single tools; and DR-MF multi-function drills, available at CNC The lathe is equipped with a single tool for a variety of machining applications such as outer turning, inner hole turning, drilling, and face turning.

Hitachi high feed arc angle milling cutter ASR multi-blade type (ultra-lubricated film JX coated blade)

Hitachi's newly developed high-feed arc angle ASR multi-blade milling cutter can perform small depth-depth and high-feed machining, which can greatly improve the production efficiency of the rough machining of the mold. The advantage of small depth of cut and high feed machining is that it can reduce the depth of cut and, if possible, increase the feed rate of the machine tool, so that after roughing, a near-required finished shape is formed, which improves the overall production efficiency. On the contrary, the use of a circular blade to increase the depth of cut to improve the cutting efficiency will leave a large amount of machining residual after processing, reducing the efficiency of finishing.

The key to improving the efficiency of small depth of cut and high feed machining is multi-blade and blade coating for high speed machining. The combination of ASR multi-blade milling cutters and JX coatings enables high-speed and efficient roughing even when milling is performed on state-of-the-art machining machines. For example, in the case of trial processing with light machining, the shank Φ32-5 blade (ASRM2032R-5 cutter head replaceable type), the blade material JX1045, and the cut material 40CrMnMo7 (corresponding to SKT3) can obtain the following excellent parameters: cutting The speed is Vc=300 mm/min (rotation speed n=3000 min-1); the feed speed is Vf=50 m/min (1 blade feed amount fz=3.3 mm/blade); depth of cut apxae=0.3×25 mm.

First of all, the ASR multi-blade milling cutter can reduce the size of the cutting edge as much as possible without affecting the cutting edge strength, and the number of cutting edges of the milling cutter can be multi-bladed. Taking the outer diameter Φ32 as an example (as shown in Fig. 5), the ASR multi-blade type is not only expanded to five blades, but also the feed rate during processing is increased by 2.5 times compared with the conventional two-blade.

As for the advantages of the high feed milling cutter, the circular insert itself has the advantage of a large depth of cut, but the higher the cutting resistance due to the increased contact point of the cutting edge with the workpiece, making the machining in the case of high feed difficult. In addition, since the tool protrudes long, the circular blade is more likely to be shaken when it is subjected to a cutting force in the lateral direction. The ASR multi-blade milling cutter adopts a unique design with axial force. Even if the tool protrudes longer, the cutter body is less likely to shake, ensuring stable machining. At the same time, the shorter cutting edge of the miniaturized insert means a reduction in the cutting resistance, which also effectively suppresses the increase in resistance caused by the multi-blade.

Secondly, Hitachi has developed a blade coating JX coating that significantly inhibits crater wear, peripheral edge wear and edge sticking. The coating is a film in which a self-lubricating material is added to the titanium-aluminum compound, and the heat of cutting causes a very thin layer on the surface of the coating film to effectively suppress the acidification of the cutting edge. In addition, the material selected for the high-hardness film is equivalent to the TiSiN-based coating in the high-hardness film field, and has excellent wear resistance for high-speed and high-efficiency processing environments. After JX coating, the processing life is extended to use. 1.5 to 2 times that of the old coating.

Efficient forming broaching and squeezing processing technology for efficient cutting tools

In the process of providing efficient cutting tools for the automotive industry for many years, Jiaxing Hengfeng/Yi Aisi Sidu Tools Co., Ltd. has realized the localization of precision broaching tools and boring tools manufacturing and grinding. By actively applying the high-efficiency technology of high-efficiency forming broaching and squeezing processing technology, the production efficiency and product quality of the car parts are optimized.

First of all, the broaching technology is no longer limited to simple inner hole splines and plane machining, and various special outer contour precision forming broaching tools (such as unequal precision external spline cylindrical broaching tools and precision spiral grooves) The opening broach) came into being. For example, with the complex surface combination broach and the car/pull combination forming broaching tool with special CNC machine tools, the batch production efficiency of some auto parts can be improved by several tens of times or even hundreds of times. Moreover, the product quality is more reliable, the accuracy is more stable, and the surface finish is better. The CNC precision grinding technology enables the rear corners to be slashed on very small and complex broaching teeth, and the complex arcs are smoothly connected, and the arc teeth can also have a relief angle. Not only that, the machining accuracy of up to μ level produces a sharp and precise cutting edge, which makes the broaching smoother and lighter. Combined with the widespread use of powder metallurgy high-speed steel and ultra-fine micro-hard alloy, the cutting speed and service life of the broach are greatly improved.

Secondly, the application of precision squeezing technology can make the processing of a large number of small modulus involute spline shafts in car parts easier. For example, a spline shaft with a modulus of 1.058, a number of teeth of 40, a pressure angle of 30° and a length of 40 mm can take up to 4 minutes to process each piece with conventional hobbing technology, while precision squeezing technology can reduce the processing time to only 10 seconds. The productivity increase is up to 24 times. In addition, due to the good distribution of tissue flow lines, not only the strength is higher, but also the surface finish and dimensional accuracy are more stable and improved. At the same time, the processing process without iron filings and oil mist has significantly improved the production environment.

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