Roller Crusher Roller Crack Repair Method

For the roller crusher, the crushing principle is to complete the crushing operation by using a roller to crush the material. Therefore, the roller is an important component of the roller crusher. Then, in the course of the work, how to repair the cracked roller?

For the roller crusher, the crushing principle is to complete thecrushing operation by using a roller to crush the material. Therefore, theroller is an important component of the roller crusher. Then, in the course ofthe work, how to repair the cracked roller? ZK CORP expert to answer.

After the roller of the roller crusher wears under normalconditions, the roller is not cylindrical in appearance and constitutes aconcave shape with two large ends and a small center. At this time, the largermud or mud mass has recesses that can wear. It does not produce a crushingeffect and therefore requires the roll to be repaired. Roller repair iscommonly used in two ways: On-site cutting (grinding) processing repair methodand on-site surfacing repair method.

First, on-site surfacing

In-situ welding is done by welding in a worn recess. This methodis simple and useful, does not affect the production, and the hardness and wearresistance of the surfacing site are relatively good, the defect is onlysuitable for a good weldability roller (such as cast steel roller). There aresome considerations during surfacing that require maintenance personnel to payattention.

1. The selection of surfacing electrodes should be appropriate,and stack 256 and stack 266 are preferred.

2. Small-diameter surfacing rods and low-current welding standardsshould be selected for layered surfacing. This reduces thermal stress and preventssevere cracking and cracking.

3. During the surfacing process, it is necessary to check thesurfacing site with a ruler model to ensure that the dimensions of the pipe areacceptable.

4. The grounding of the electric welding machine should bedirectly on the roller, and should not be placed on the shaft to prevent thecurrent from flowing through the tumbling bearing and sparks will occur,causing the bearing's roll body and raceway surface to burn.

Second, on-site cutting (grinding) processing method

On-site cutting (grinding) processing methods are: In the crusherframe, a special tool holder is installed, and the moving track should beparallel to the axis of the roller. When the crusher is opened during therepair, the roller is cut with a manual feed (optionally with active feed).

1. The running track of the tool carrier is parallel to the axisof the roller to prevent taper after cutting and affect the crushing effect.

2. Control the speed of the roller. The linear speed of the outersurface of the roller should not exceed the allowable cutting speed of thecutting tool. Otherwise, the speed reduction method should be adopted toprevent damage to the tool.

3. On the high hardness of the roller, cutting can not beprocessed, then choose the grinding head according to the cutting method forgrinding.

Third, open the repair method

After the dismantling and repairing method, the shafts of therollers are all dismantled together, and they are applied to the machine afterbeing repaired by turning. This method requires a lot of work and requires longdowntime, but it is easy to repair.

Roll crusher is a kind of crushing equipment, its feed particlesize is relatively small, fine particle size, mainly used for secondarycrushing in stone production line, applicable to cement, metallurgy, chemicalindustry, power, coal, building materials, fire-resistant materials and otherindustrial sectors crush high and medium hardness materials. ZK CORP focuses oncrushing equipment for 60 years. Welcome new and old customers to consult andpurchase.