Flat washers are usually thin pieces of various shapes, used to reduce friction, prevent leakage, isolate, prevent loosening or disperse pressure. Such components are found in many materials and structures to perform various similar functions. Due to the limitation of the material and technology of threaded fasteners, the bearing surface of bolts and other fasteners is not large. Therefore, in order to reduce the compressive stress of the bearing surface and protect the surface of the connected parts, washers are used. Flat Washers,Stainless Steel Flat Washers,Large Flat Washers,Flat Rubber Washers Jiangsu Jiajie Special Screw Co., Ltd , https://www.tzbolts.com
The utility model relates to a diamond-based composite picking head in which a picking head is embedded in a head of a cemented carbide substrate, and a surface of the cemented carbide body portion is exposed on the surface of the picking head to be coated with a diamond composite material. Therefore, the preparation operation is simple, the application range is wide, and the wear resistance is improved by 3000 times and the impact resistance is correspondingly improved as compared with the ordinary hard alloy. When applied to the roadheader, the tunneling speed can be increased by more than 30%, the service life is greatly extended, and the tunneling cost is reduced by about 35%.
Hongyuan superhard material applied for special compound picking patent for tunneling machine
Recently, it was learned that Hongyuan Superhard Materials (Henan) Co., Ltd. applied for a patent for special composite picks for utility model tunneling machines. The patent number is: ZL 2009 2 0092414.6.