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For the wearable parts of the double-shaft shredder, frequent inspections are required. If excessive wear is found, the parts should be replaced in time, especially the shredder blade. Keep the double-shaft shredder in good lubrication condition. Generally, it is normal that the bearing temperature does not exceed 70 degrees. What are the processing steps of the blade of the double shaft shredder?
1. The choice of shredder blade
The shredder blades generally use Cr12mov, w6mo5cr4v2, w18cr4vSKH, M2 and other types of steel, and the better quality is generally selected SKD11 steel. The shredder blades produced by this kind of steel processing are not only wear-resistant, but also not easy to break, and shredding effect Not bad. If it is used to shred waste materials such as rubber, fiber, paper, etc., 9CrSi alloy tool steel is generally used. The shredder blade produced by this material is not only very hard, but also brittle and has abrasion resistance. Not bad. In short, the choice of raw materials depends on the type of shredder.
2. Cutting and forging of shredder blade
According to the drawing of the shredder blade, the steel is blanked. Generally, a laser cutting machine is used for blanking. Not only the precision of the shredder blade is accurate, but the edge is smoother, and it is easy to handle later. Subsequently, the rough material is forged. During the forging process, the rough material must be inspected for flaw detection. If cracks or unqualified materials are found to be removed, the unqualified materials shall be recycled, and processing should not be continued.
3. Tempering of shredder blade
Tempering the already forged blanks for preliminary heat treatment. Generally, the tempering temperature is not high. The main purpose of tempering is to transform the blanks into sorbite.
4. Primary processing of shredder blades
Perform preliminary processing of the tempered shredder blade blanks, forge the blanks to remove surface impurities, and try to keep the blanks as flat as possible to avoid increasing the workload in the later stage. The initially processed blanks are for heat treatment. ready.
5. Heat treatment of shredder blade
Heat treatment of the pre-processed shredder blade blank. The main purpose of the shredder blade is to improve the mechanical properties of the shredder blade, heat it at high temperature and then quickly cool it, so that the steel material becomes martensite, and heat treatment In the process, the deformation of the steel must be taken into consideration and the deformation of the material must be controlled to ensure the quality of the blade.
6. Surface grinding of shredder blade
Surface grinding is performed on the shredder blades that have been processed. Surface grinding is mainly to remove surface impurities. Try to put a 0.3mm margin during the surface grinding process to reduce the workload of Jingmo. Surface grinding is processed on a grinder, and the surface should be polished before wire cutting can be performed.
7. Shredder blade line cutting
During the wire cutting process, the wire should not be moved too fast, and it should be perpendicular to the plane. When the inner hole is wire cut, it should be processed according to the dimensions provided in the drawing, so as to avoid later use and affect the installation of the equipment.