What problems should be paid attention to when using roller bearings

As the first of the key parts of the machine tool, the roller bearing has a particularly important function. If it cannot be used properly or maintained on a quarterly basis, serious damage to the roller will easily cause the machine to malfunction and cause safety risks. Below, people seem to have seen what problems should be paid attention to in the application and maintenance of roller bearings to prevent damage during the application period.

　　 One, know the specifications

　　The roller bearing is composed of four parts of the main roller side roller head baffle plate. Although the parts are small, the load is quite large. Each machine command often has rollers with different specifications. In the application process, it is necessary to know the matching roller specifications of the machine itself, and remember that there should be no deviation of the slightest, otherwise the edge banding of the roller and its raceway surface is wrong, it is easy to appear in the operation process Failure and its potential safety hazards.

　　 2. Understand the instructions for use

　　Roller bearings are more commonly used in CNC lathes or non-ferrous metal surfaces. The rollers must be cleaned with gasoline and then installed on the seated bearings, and the industry's grease should be wiped evenly. When inspecting the grease introduction hole, be sure to point to the part without carelessness. In the long-term use of rollers, pay attention to the damage level of the roller bearings on a regular basis. If the rollers are found to be damaged or severely damaged, they should be repaired and replaced immediately.

　　 Three, quarterly maintenance

If the roller bearing is not wiped with grease on time or introduced into the lubricating hole every quarter, it is prone to serious damage, and you should pay attention to wipe the grease evenly to prevent serious heat during the application process. There is a state of deposition and condensation. The business organization of the roller bearing will show the lubricated products together when purchasing in the store, and the maintenance time of the rollers should be about -3 months per quarter.

　　The surface of the roller bearing is too thick, but it is also prone to serious damage. The installation process and its quarterly maintenance can reasonably increase the life of the roller. At the same time, we should pay attention to the roller specifications mentioned in this article. It is worth mentioning that if you change the brand of grease, you should carefully check whether it has the same effect as the original brand of lubricant.

If there are bruises, rust layers, wear debris, sand, dust and soil on the assembly surface of the roller bearing and the matching parts, first, the bearing equipment is difficult and the assembly part is wrong; second, this kind of attachment constitutes Abrasive and wearable roller bearing work appearance affects the assembly quality. Therefore, the equipment should pre-process the appearance of the shaft journal, the bearing housing shield hole, the inner hole of the shoulder, and the matching appearance of the butt parts such as shaft sleeves, washers, end caps, etc., and stop careful inspection. If there is a rusty layer, it can be filed off with a fine file and lighted with a fine sand cloth. In addition, the surface of the bearing assembly and the attachments on the mating parts should be removed.

Precautions for the use of bearings: Bearings are delicate parts, and their use must be relatively carefully stopped. No matter how high-performance bearings are used, if they are used improperly, the estimated high performance will not be obtained. Precautions concerning the use of bearings are as follows:

　　 1. Hold the bearing and its surrounding clean. Even the small dust invisible to the eyes will affect the roller bearing. Therefore, it is necessary to persevere to clean around, so that dust will not invade the bearing.

　　 2. Use it with caution. A strong impact on the bearing during use can cause scars and imprints, which can become the cause of accidents. In severe cases, there will be cracks and cracks, so you need to pay attention.

　　 3. Appropriate special tools for actual operation. To prevent the substitution of special tools at the current stage, it is necessary to use appropriate special tools. Such as special-purpose sleeve specifications, punching machines, etc.

　　 4. It means the corrosion of the bearing. When the bearing is actually operated, the sweat on the hands will become the cause of rust. Pay attention to the actual operation with clean hands, and you should carry rubber gloves with you.

　　 5. It is not necessary to disassemble the packing of the bearing before the pre-preparation work is carried out to prevent air pollution.

The life of the roller bearing is more sensitive to the load than to the speed. Therefore, for multi-stage transmission shafts, if possible, it is advisable to put a large speed reduction into a later stage; for the main shaft bearing, if possible, appropriately distribute the external load. The distance between the point and the bearing fulcrum is trying to reduce the load of the spindle bearing, and the load transmitted to the spindle bearing is stable to prevent shock and vibration. This requires the shape and location of the bearing equipment to be accurate and high, and the backlash of the bearing Choose proper matching and precision of bearing equipment.

　　The shaft parts of the machine tool are very spindles. They are usually assembled with bearings or drag bearings. They rotate at a high speed, which sometimes causes high heat. If this kind of situation is not cleaned up in time, it will cause the bearing to overheat and increase the temperature of the relative position of the machine tool to cause thermal deformation. In severe cases, the main shaft and the tailstock will not be high. This will not only affect the accuracy of the machine tool itself and the manufacturing accuracy, but also Will burn the bearing.

　　The cause of bearing heating and its cleaning method

　　1. Reason: low bearing accuracy. Method: adopt bearings with standard accuracy level.

　　2. Reason: the spindle is bent or the housing hole is not centered. The method: repair the spindle or the housing.

　　 3. Reason: The belt is too tight. Method: Adjust the belt to make it tight.

　　4. Reason: poor finish. Method: use standard grades of glossy materials and remove them appropriately.

　　 5. Reason: Low assembly quality. Method: Develop assembly quality.

　　6. Reason: The inner and outer shell of the bearing runs circle method: dismantle and replace the bearing and related damaged parts.

　　7. The method of large radial force: Clear and adjust the gap of the seal ring to request the middle of 0.2～0.2mm, change the diameter of the impeller balance hole and check the static balance value.