Counterattack hammer

The impact plate materials produced by our company include wear-resistant blow bars made of high chromium blow bars, composite blow bars, alloy blow bars, and high manganese steel plate hammers. When crushing materials with medium hardness, high manganese steel can be used as the material of the blow bar. When crushing materials with higher hardness, chrome molybdenum alloy lining plate, ultra-high chrome white cast iron and other materials can be used.

Large-scale impact crushers have the advantages of simple structure, large crushing ratio and high efficiency, and are widely used in mining, cement, metallurgy, electric power, refractory materials, glass and chemical industries. The plate hammer is one of the key and easily worn parts of the large-scale impact crusher. When the crusher is working, the high-speed rotating rotor drives the plate to hit the crushed ore at a linear speed of 30~40 m/s.

1500mm, the wear is very serious and the impact force is large, so the blow bar is required to have high wear resistance and impact resistance. Although the traditional high manganese steel has high toughness, the wear resistance is not high, and the wear consumption is too large. Although ordinary high-chromium cast iron has high hardness, its toughness is not high and it is easy to break. In view of the working conditions and structural points of the large impact crusher's blow hammer, we optimize the composition design and heat treatment process on the basis of the existing ordinary high-chromium cast iron.

, developed an ultra-high chromium cast iron plate hammer (Cr22Mo2NiCuWV) with high comprehensive wear resistance, and its service life is more than 3 times that of ordinary high manganese steel

There are several ways to fasten the plate hammer on the rotor: 1. Bolt fastening method. The blow bar is fastened to the blow bar seat of the rotor by means of bolts 1. The plate hammer seat has a tenon shape, which can use the tenon to withstand the impact force of the plate hammer during operation, avoid bolt shearing, and improve the reliability of bolt connection. 2. Embedded fastening method. The blow bar is inserted into the groove of the rotor from the side. In order to prevent the axial window from moving, both ends are positioned with pressure plates. Since the fastening bolts are removed, the reliability of the board is improved. profit

The centrifugal force generated by the rotation of the plate hammer and the reaction force when the impact is broken are fastened and self-locked, and the rotor is easily worn and made into a replaceable structure, so it is easy to assemble and disassemble, and it is easy to make. 3. Wedge fastening method. Insert the wedge into the corresponding slot between the blow bar and the rotor to tighten it.