The roller crusher itself is subject to high stress wear while applying a destructive pressure to the material. Stainless Steel Hex Bolts,Hexagon Screw Head,Heavy Hex Bolt,Hex Bolt Shaoxing Grace International Trade Co.,Ltd , https://www.shaoxinggrace.com
The roller crusher itself is subject to high stress wear while applying a destructive pressure to the material. When the hardness of the material is greater than the allowable pressure of the surface of the roll skin, such as the stony stone and the coal gangue, the hard material is embedded in the surface of the roll skin to form pits or pittings. These embedded hard materials scrape the roll surface down or scrape the roll surface into a groove. Manually surfacing and wear-resistant welding rods repair roll sleeves, which consume 50-100 kg of welding rods each time, which is costly and has limited effect.
Industrial production is inseparable from the breaking of materials, but the materials used are different, and the machines used are different. Crushing equipment used in mine beneficiation and gravel production lines: roller crusher, impact crusher, jaw crusher, fine crusher, heavy hammer broken, cone broken. The crucible crusher is widely used in the industrial sectors such as mineral processing, chemistry, cement and building materials. Long-term use of the roller wear, if it is more abrasive, it can not play a good crushing effect. This article source mechanical introduction to the repair method of the roller: in-situ welding method and in-situ cutting method.
In situ surfacing
In-situ overlay welding is the welding fill at the worn notch. This method is simple and practical, does not affect the production, and has good hardness and wear resistance to the welded portion. The disadvantage is that it is only suitable for rollers with good weldability (such as cast steel rolls). Pay attention to the following matters during surfacing:
1 Select small-diameter surfacing rods, small current welding specifications, and stratified surfacing. This reduces thermal stress and avoids severe deformation and cracking.
2 The grounding of the welding machine should be placed directly on the roller, not on the shaft, so as to prevent current from flowing through the rolling bearing, causing sparks, causing the bearing rolling elements and the surface of the raceway to burn.
In addition, it is also possible to use the post-removal repair method, which is to completely disassemble the roller shaft together and repair it and then install it on the machine.
3 During the surfacing process, the surfacing part should be inspected frequently with a straight-line model to ensure the dimensions are qualified. The existing submerged arc welding process can be used to strengthen the existing wear roller sleeve. After the repair of the roller sleeve, the working life is significantly improved compared with the casting of the new roller sleeve and the welding of the welding rod. The user uses the steel bar to repair the roll sleeve, the manganese steel piece needs to be machined, the ordinary steel piece needs to be welded and wear-resistant electrode, and the repair effect is not satisfactory.
Our company has developed a wear-resistant surfacing electrode for the roller crusher. By repeatedly adjusting the composition of the electrode coating, we found an alloy system suitable for the surfacing of the roller crusher. The metallographic microscopic analysis and X-ray phase analysis of the surfacing layer show that the newly developed roller crusher wear-resistant surfacing electrode has martensite + carbide + retained austenite, and the hardness of the surfacing layer is HRC64~ Between 65, the wear test and industrial test proved that the wear resistance of the roll crusher surfacing alloy is excellent, which is 8.6 times that of 35CrMoTi steel, which is 7.8 times higher than that of the unstacked crusher. Stone production line Crusher accessories Charcoal machine free brick machine Ball mill ball mill accessories oil press oil machine parts rotary kiln dryer consultation electric QQ784480418
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