Roll crusher for primary crushing of materials is that it in some stone production line is also very widely used for cement, metallurgy, chemicals, electricity, coal, building materials, refractories and other industrial sectors broken, the higher hardness materials.
Normally, under the roll crusher roller wear, the roller surface is not cylindrical, forming two big middle small concave profile. At this time a large lump of clay or mud pie is likely to wear through the notch, would not achieve the effect of broken, so the need for repair roller.
Roller repair used in two ways: griding and surfacing.
Griding method of operation is: in the crusher frame, install a special knife, move the track should be parallel with the axis of the roller. Repair broken machines start with the manual feed sector (also can be conditionally automatic feed body) of the cutting roller. Application of this method should note the following:
① turret trajectory parallel with the axis of the roller, so after taper cutting, impact crushing effect.
② control the velocity of the roller. Roll surface speed should not exceed the allowable cutting speed cutting tools, or measures should be taken to slow down to avoid damage to the tool.
③ For the high hardness of the roller, the cutting can not be processed, then the method can be used for cutting grinding by grinding
surfacing method of operation is to wear a notch in the Department to conduct welding filler. This method is simple and practical, does not affect the production and welding parts of the hardness and wear resistance are relatively good, only drawback is that for good weldability roller (such as steel roller). Surfacing should note the following:
① Select the appropriate welding bar to the use of reactor 256 and reactor 266 is appropriate.
② should select the small diameter of the welding section, a small current welding specifications, welding stratified. This would reduce the thermal stress, to avoid serious distortion and cracks.
③ welding process, the model should always use a ruler to check for welding parts to ensure
④ Ground welding machine to directly take on the roller, do not ride on the shaft, so as to avoid current flow through the bearing, resulting in sparks, so that the rolling bearing raceway surface of the body and burning.
In addition, it can be used after the demolition of repair method, that is, with all of roller shafts removed, restored by turning on the machine installation to use.