Superhard tools are widely used in the automotive industry

Tool materials have changed a lot, and CBN (cubic boron nitride), PCD (polycrystalline diamond), ceramic tools and other superhard tools have been widely used. Due to its extremely high hardness, PCD cutters have a very high service life when processing aluminum workpieces and other non-ferrous metals and their alloys. In recent years, with the large-scale application of lightweight materials (such as aluminum alloys, composite materials, plastics, etc.) in the automotive industry, The application of PCD tools has also increased significantly. Nowadays, many parts of the cylinder block, cylinder head, gearbox housing, valve body, groove body and side cover of the automobile engine are made of aluminum. The machining of these parts has adopted a large number of PCD tools, which has achieved good results. Generally, the life of each knife is about several thousand pieces of workpieces, and the length can reach 1.5 to 20,000 pieces. The CBN insert is characterized by extremely high hardness, second only to diamond, especially its red hardness. It can maintain its hardness and good cutting performance at over 1000 degrees high temperature, adapt to the needs of high-speed cutting, and also meet some The processing needs of high-hardness and difficult-to-machine parts have been obtained, and good application results have been obtained in the processing of powder metallurgy parts such as cast iron parts such as engine blocks and valve seats. For example, CBN inserts are used in the machining of cylinder bores in semi-finished and fine-finished processes. The cutting speed can reach 800m/min, and the tool life is more than double that of cemented carbide tools. In the processing of the surface, the cutting speed of CBN milling cutter can reach more than 1200m/min, the high can even reach 2000m/min, and the feed speed can reach 1000-; mm/min. At present, auto parts manufacturers have reduced the amount of equipment in the production line and reduced the number of equipment in the production line. At the same time, they hope to ensure the production cycle, and use a machining center with high-speed machining capability to significantly increase the amount of cutting. High-speed cutting CBN tools, such as in the machining of in-line four-cylinder engine blocks, almost all face milling uses CBN tools, although CBN tools are more expensive, but considering their improvement in processing efficiency and investment The cost savings are generally economical. In the processing of the gearbox housing, Shanghai General Motors changed the original carbide boring tool to PCD tool, and the tool life increased from 3,000 to 70,000. The economic benefits are very obvious. CBN tools can be used to machine hardened workpieces, so that it can be used for grinding. For example, Daewoo Motor Co., Ltd. uses CBN tools for machining the shaft on the input and output shaft of the gearbox instead of the original grinding wheel. Grinding process performed.
As another tool in high-hard material tools, ceramic tools are also a tool worthy of attention and expanding in the field of application. The brittleness of ceramic tools in the past is being improved. Now there are toughened ceramic tools. For rough machining of cast iron workpieces, such as in the rough machining of cylinder bores of engine cylinders, whether it is V-type 6-cylinder engine or in-line 4-cylinder engine, ceramic cutters are used for rough machining of cylinder bores, which significantly improves machining efficiency. Its pupil cutting line speed can reach 700m/min to 800m/min.  

Clay Target

Wuxi Holly`s shooting clay target is an exciting enhancement to clay pigeon shooting.On impact from a high velocity projectile, such as a pellet from a shotgun, the target ignites in order to reflect a direct hit producing a pyrotechnic reaction.The reaction is effective and exciting, resulting in an explosion of white smoke, bright flash and a fairly loud bang.

Our shooting target is produced by new green clay materials, it is green environmental protection, no pollution and could be easily degraded. It could be used in professional shooting competitions.This type is smoking clay target.They're made from a mixture of pitch and pulverized limestone to achieve that calculus of durability and brittleness to break when hit by a few shotshell pellets.There are biodegradable targets that over time dissolve into the soil.

Clay Shooting Target,Colorful Shooting Targets,Safety Clay Pigeon Target,Safety Clay Target

Wuxi Holly International Trading Co., Ltd , https://www.hollynbr.com