Talking about the Application of Self-lubricating Bearings in Casting

Self-lubricating bearings have a wide temperature range, sufficient solid lubricant content, uniform release, good self-lubricating properties and occlusion, which can effectively protect the journal and achieve long-lasting use. It is suitable for operation in high temperature, low speed, heavy load, large dust, water shower and impact vibration. It can be widely used in the rolling of mining machinery, metallurgy, petroleum, chemical, food, textile, paper, printing and dyeing machinery and equipment. And sliding bearing parts.
      The aluminum liquid produced by the aluminum electrolysis cell is sucked out by vacuum lifting and then poured into the mixing furnace. After the proportioning and slag removal, it flows into the aluminum ingot casting machine for casting, and the formed solid is called aluminum ingot, and the produced aluminum is produced. The ingots are stacked by a stacker. In order to improve production efficiency, the aluminum ingot must be cooled with a large amount of cooling water before molding, and the huge heat of the aluminum liquid is released into the cooling water during the cooling process to generate hot water vapor.
v Casting machine bearings are in high temperature and water vapor environment. Many bearings are greased. The added grease will be melted and overflowed due to high temperature in a short time. It is difficult to maintain and maintain, and the surface of the equipment is difficult to wipe. Further, the steel structure bearing is easy to corrode and rust in a hot and humid environment, the failure rate is very high, the equipment maintenance cost is high, and the equipment operation is often troubled by the following two problems.
      It is difficult to realize high-temperature continuous operation of the oil supply operation. The ingot, ingot, ingot, and ingot are installed in the unit casing. Each rotating bearing is designed with a grease fitting that periodically injects grease. Remove the housing and use a grease gun to pressurize the grease. And the whole machine has more than 30 oil injection points. The long-term operation and maintenance can not achieve this cumbersome oil filling operation. It is only necessary to hold the thin oil pot and pour it on the outside of the running bearing sleeve. It is difficult for the lubricating oil to enter the friction pair of the bearing. Some of the bearings are in a frictional state.
      High ambient temperature, grease lubrication is not suitable for the current casting machine rolling bearing used in the molybdenum disulfide grease is considered to be resistant to high temperature grease, we know that its base oil is a petroleum product, add a small amount of high temperature resistant molybdenum disulfide additive, its temperature limit That is 120 ° C. According to the test, the working temperature of the casting machine bearing can reach 200 °C, which has far exceeded the temperature limit of grease.
      Under such high temperature conditions, the base oil in the grease will become thinner and gradually evaporate, and the remaining carbon residue, molybdenum disulfide and dust will be mixed into a solid block to solidify on the cage of the rolling bearing, which not only loses its lubricating effect, It also hinders the normal operation of the rolling bearing and wears out quickly. It takes up to 2 weeks to stop, and removes the bearing to clean the grease.

For more information and purchase please visit: https://www.supplyforever.com

Domestic and foreign bearing test methods

At present, there are four main bearing test methods at home and abroad: 1. friction and wear test, second, test bench test, third, test room (test field) simulation test, and fourth, actual working condition operation test.

Foreign countries have used the above several test methods, but the application purpose is different. For example, to develop a brand new product, firstly, a friction and wear test must be performed. However, if there is not much change in the form of friction and wear, only the product size and load conditions change, only the bench, simulation or actual running test is needed. Foreign countries have very strict assessments of new products (such as car wheel bearings, etc.) in key parts, and must be tested in actual operation before they can be approved for use. Swedish SKF bearings, Japan NTN bearings, newly researched bearing simulation test technology, can only replace benches, simulations or experiments, to shorten the time of product design, speed up the progress of product development, but there is still a gap from the actual operation. At present, China's bearing industry has carried out friction and wear tests, only one of Luoyang Bearing Research Institute; has carried out bearing bench test, including Luoyang Bearing Research Institute, Shanghai Axis Research Institute, Hangzhou Bearing Test Center and Wafangdian, Harbin, etc. Yujiaguo has bearing enterprises; Luoyang Bearing Research Institute, Hangzhou Bearing Test Center, Luozhou, Xenxi and other enterprises can be launched for simulation test. In order to carry out the actual test, the bearing manufacturer will only carry out the requirements when the supporting mainframe enterprise puts forward this aspect, such as the wheel bearing of the railway passenger wheel to the bearing and the car. In short, the domestic implementation of simulation and actual operation test is not extensive, and should further expand the scope of the host or the actual working conditions, and prepare sufficient software and hardware for the simulation test to mention the schedule as soon as possible.

For more information and purchase please visit: https://www.supplyforever.com

Domestic and foreign bearing test methods

At present, there are four main bearing test methods at home and abroad: 1. friction and wear test, second, test bench test, third, test room (test field) simulation test, and fourth, actual working condition operation test.

Foreign countries have used the above several test methods, but the application purpose is different. For example, to develop a brand new product, firstly, a friction and wear test must be performed. However, if there is not much change in the form of friction and wear, only the product size and load conditions change, only the bench, simulation or actual running test is needed. Foreign countries have very strict assessments of new products (such as car wheel bearings, etc.) in key parts, and must be tested in actual operation before they can be approved for use. Swedish SKF bearings, Japan NTN bearings, newly researched bearing simulation test technology, can only replace benches, simulations or experiments, to shorten the time of product design, speed up the progress of product development, but there is still a gap from the actual operation. At present, China's bearing industry has carried out friction and wear tests, only one of Luoyang Bearing Research Institute; has carried out bearing bench test, including Luoyang Bearing Research Institute, Shanghai Axis Research Institute, Hangzhou Bearing Test Center and Wafangdian, Harbin, etc. Yujiaguo has bearing enterprises; Luoyang Bearing Research Institute, Hangzhou Bearing Test Center, Luozhou, Xenxi and other enterprises can be launched for simulation test. In order to carry out the actual test, the bearing manufacturer will only carry out the requirements when the supporting mainframe enterprise puts forward this aspect, such as the wheel bearing of the railway passenger wheel to the bearing and the car. In short, the domestic implementation of simulation and actual operation test is not extensive, and should further expand the scope of the host or the actual working conditions, and prepare sufficient software and hardware for the simulation test to mention the schedule as soon as possible.

For more information and purchase please visit: https://www.supplyforever.com

Introduction to common causes of damage to imported bearings

Most of the imported bearings are damaged for many reasons, such as excessively small bearing clearances caused by previously estimated loads, ineffective seals, and tight fits. Any of these factors have their particular type of damage and leave a special mark of damage. Therefore, inspecting the bearing of the damaged shaft, in most cases, its possible cause can be found.

In general, one-third of bearing damage is caused by fatigue damage, the other third is due to poor lubrication, and the other third is due to contaminants entering the bearing or improperly installed. However, these types of damage are also related to industry. For example, most of the pulp and paper industry is due to poor lubrication or contamination resulting in bearing damage rather than material fatigue.

For more information and purchase please visit: https://www.supplyforever.com

Application design considerations for variable speed bearings

Application design considerations for variable speed bearings
    1. Reference to the shape and connection dimensions of variable speed drive bearings
    2. The variable speed drive bearing can be placed horizontally or vertically or tilted. Can be rotated forward and backward. Positive and negative input and output power (ie deceleration or speed increase).
    3, variable speed drive bearing regardless of the installation method, and its couplings have size matching requirements.
    Recommended:
    The inner ring hole d and the shaft are matched by H7/h6;
    The pin hole do of the middle ring and the transmission are matched by H7/r6;
    The outer ring D and the housing are matched by H8/h7;
    The gear is matched with the hole on the output shaft by a clearance fit, and the gap is 0.2~0.5mm.
    4. Axial positioning of variable speed transmission bearings: After any three turns of the ring are axially positioned, the other two axes do not need to be axially positioned.
    5. Positioning in the direction of rotation; both the outer ring and the inner ring are flat key positions. The middle circle is using the drive positioning
    6. The variable speed drive bearing can bear a small external force in the radial direction, as shown in Figure 5, but it is not suitable for a large working load.
    7. Transmission ratio is the transmission ratio according to the first installation method. If other installation methods are used, the gear ratio should be calculated according to Table 1.
    8. At rated speed (1500 rpm), select the variable speed drive bearing model according to the transmission ratio and required power (Kw) according to Table 2.
    9. When based on the working torque, select the model according to Table 3.
    10. The selection of the reducer model is consistent with the model of the variable speed drive bearing.

For more information and purchase please visit: https://www.supplyforever.com

What should I pay attention to when choosing a stone engraving machine?

1. To understand the performance and function of the stone engraving machine motor, the engraving machine manufacturer recommends that the engraving head motor of the engraving machine is also very important, because the engraving head motor is generally not covered by the warranty, and the engraving head motor is continuously working for a long time. Therefore, if the engraving head motor is not good, it will affect the use of the engraving machine.

2, should pay attention to the function of the stone engraving machine, the engraving machine of the engraving machine has high power and low power. Some engraving machines are only suitable for the processing of two-color boards, architectural models, small signage, three-dimensional handicrafts, etc. This process has been popular for some time, but the engraving power is too small and greatly affects its application range. The other is an engraving machine for high-power engraving heads. The engraving machine is divided into two categories, one is a large-format cutting machine: the width is generally more than one meter, but the precision of this engraving machine is generally poor; The class is a medium-sized engraving machine: this engraving machine is generally used for fine processing and organic sign making.

3, the other is the adjustable speed range of the engraving head motor, the general speed adjustable range is several thousand to 30,000 revolutions per minute, if the speed is not adjustable or the speed adjustable range is small, then the application range of the engraving machine is It is very limited because different materials must be rotated with different engraving head speeds.

4, the engraving machine body manufacturing process: high-power engraving machine work requires the body must be precise and stable, so long-term high-power engraving should use the casting body to ensure its processing accuracy and stability.

5, the controller is generally divided into two categories: one type of controller is only to do the drive, and all its calculation work is done by the computer. When the engraving machine is working, the computer is in a waiting state, and the typesetting work cannot be performed. Another type of controller is controlled by a single board or a single-chip microcomputer. This controller is actually a computer, so as long as the engraving machine starts working, the computer can immediately perform other typesetting work.

Engraving machine dust cover maintenance

The engraving machine dust cover is widely used in our daily life. Then, how do we protect and maintain the service life in the usual way? Let's look at it:

Engraving machine

1. The content of regular inspection is mainly the inspection of the dust cover of the engraving machine to avoid the adhesion of dust and abrasive particles to the outer surface of the screw. If these things exist, it will affect the service life of the screw and the accuracy of the work, forming the product. If it is unqualified, if the damage of the screw guard cover is found during the inspection process, it should be repaired in time, and it should be replaced in time when the damage is severe.

The above is about the use of the engraving machine dust cover to do good work, the development and implementation of these operations can fully exert the effect of the engraving machine protective cover, reduce the occurrence of problems, and can extend the life.

2, daily viewing

Excavation of all kinds of chips and other stolen goods in the excavation table, to avoid the accumulation of debris, to see if the running track reaches the smooth requirements, to avoid the damage caused by the huge conflict caused by the lack of smooth oil, to see if the appearance is very smooth, The presence or absence of scratches, as a basis for detection of early detection, these problems are best repeated before the afternoon of work, these tasks are the main points of the day, expectations to cause our attention.

Woodworking engraving machine size selection

Customers should choose the type of woodworking engraving machine and its power according to the needs of the business and the funding situation.
Woodworking engraving machine generally has a small-format engraving machine of 600mm×600mm and 600mm×900mm, and the feeding width is 700mm. The engraving two-color board is the most basic application of the small-format engraving machine, and the acceptance is very good. The price of the smaller engraving machine is similar to that of the engraving machine, but it is more troublesome and unnecessary waste when engraving the two-color board.
The large-format woodworking engraving machine has 1200mm×1200mm, 1200mm×1500mm, 1200mm×2400mm, 1300mm×2500mm, 1500mm×2400mm, 2400mm×3000mm. The engraving machine of the above models has a feeding width of more than 1350mm, and the plexiglass on the market and The size of the PVC board is 1220mm × 2440mm, so these models are suitable for customers who require large-format engraving machines.

The lack of maintenance of the cabinet door woodworking machine will bring us big trouble.

The small problem of the cabinet door engraving machine will bring us big trouble. When using machinery, we all need to maintain the equipment. Of course, woodworking engraving machines also require regular maintenance and repair by users. If we do not do a good job in the maintenance of the cabinet door engraving machine, or even neglect. Then some small problems of the cabinet door engraving machine may bring us big trouble. Many woodworking engraving machines have water-cooled spindles. If the temperature is too low, it is easy to freeze the main shaft and circulating water pipes, which can easily damage the spindle.
At present, inverter-driven asynchronous AC motors are often used to realize small-power non-inductive vector inverters, which are small in size and cost-effective, and are mostly used in engraving machine systems with spindle power lower than 3.7KW. The copper loss and iron loss of the motor of the engraving machine will be expressed in the form of heat, which will affect the efficiency of the motor. Stepper motors generally pursue positioning accuracy and torque output. We know that three skilled workers are debugging a two-to-eight woodworking engraving machine. In less than ten minutes, eight roses are carved on eight flower boards. It is conceivable that in such an efficient operation of our cabinet door engraving machine, not only our main shaft but also the motor will have great wear and offset. Once the knives of the cabinet door engraving machine are offset, do not say that the high-precision operation of roses is a large, very serious deviation of ordinary engraving. Therefore, in our actual production process, you can touch the hand for more than 1-2 seconds, not more than 60 degrees; you can only touch it by hand, about 70-80 degrees; a few drops of water quickly vaporize, then more than 90 degrees, It is to reduce copper loss and iron loss. In this case, we can choose antifreeze instead of water. If the condition is ok, the spindle should be air cooled instead of water cooled when purchasing the engraving machine.
 Of course, the guide rails (square rails or compasses) and racks of the cabinet door engraving machine should be cleaned and oiled frequently, and the wires should be checked for aging or breakage to avoid leakage. In the processing of some heavy-duty stone, the heavy-duty stone engraving machine is different from the general light-weight cabinet door engraving machine, not only because its bearing capacity is stronger than that of the light-weight machine, but also because it uses the rack-driven method to engrave high efficiency. In the case, the efficiency of our cabinet door engraving machine is relatively low, the current is generally large, and the harmonic components are high. The frequency of the alternating current also changes with the rotation speed. Therefore, the stepping motor generally has a fever condition, and the situation is higher than that of a general AC motor. serious.

Cabinet door engraving machine maintenance method Cabinet door wood engraving machine maintenance skills

Although the working tendency of woodworking engraving machines is now used to engrave wood, the targets for engraving in different manufacturers are different, such as the overall details and precision of the engraving machine for wood engraving machines for cabinet door engraving. The requirements are relatively high, so that we should pay special attention to the maintenance of the woodworking machine to ensure the stability and precision of the engraving machine. Next, follow the CNC network Xiaobian to learn about the maintenance method of the cabinet door engraving machine. The related content of the cabinet door woodworking engraving machine maintenance skills!
Before starting the machine, first check whether the various parts of the machine are normal, whether the accessories are intact, and the addition of the rail screw lubricant. After starting the machine, the spindle should be operated vulgarly for ten minutes to observe whether there is any abnormality. After the machine is running normally, it can work.
2. Wardrobe door engraving machine spindle, workbench, guide rail and other components are prohibited from vigorously knocking and impacting, and the workbench and the guide rails are not allowed to be placed indiscriminately.
3. It is best not to wear gloves for processing in the overweight of processing. A large amount of wood chips and dust will be generated during the processing. It is necessary to protect the eyes and nose and mouth. It is strictly prohibited to touch the hand or other items during the processing. In the tool, when cleaning the wood chips, make sure that the tool is completely stopped before cleaning.
4. After the wardrobe door engraving machine is finished, turn off the power supply, clean the wood chips and sundries in various parts, and other tools should be placed in the original position.
5. The transmission components such as guide rails and lead screws should be cleaned and oiled every day.
6. The cooling method is water-cooled closet door engraving machine. To ensure the cleaning of the cooling water and the normal operation of the water pump, it is forbidden to appear water-cooled spindle motor water shortage. In summer, the cooling water is regularly replaced to prevent the water temperature from being too high. In the winter, antifreeze measures should be taken to avoid the cracking of water pipes.
7. If the wardrobe door engraving machine is not used for a long time, it should be refueled regularly to ensure the flexibility of the transmission system.
8. Regularly clean the cabinet. There are a large number of electronic components in the cabinet. If it is not cleaned for a long time, it will cause serious damage to the internal electronic components. When cleaning the electronic components in the cabinet, be sure to cut off the power.
9. Regularly check the screws of the various parts of the machine for looseness to ensure the normal operation of the equipment.
10. It is strictly forbidden to forcibly move the X/Y/Z triaxial position when the power is off.

Which is faster for advertising engraving machines and wood engraving machines?

Let's talk about the speed of the advertising engraving machine and the woodworking engraving machine. Today, the ad engraving machine is for you to understand, let's learn together.
Due to the variety of models and types of engraving machines, many users and enthusiasts of engraving machines cannot accurately judge and judge them separately. For example, in the case of advertising engraving machines and woodworking engraving machines, many people think that they are almost the same, and it is easy to confuse them. The main reason is that everyone has insufficient understanding and understanding of the engraving machine. It is because when you buy the engraving machine, you feel the difference in shape, size and function, but the price difference is very big.
Advertising engraving machine
We also often receive consultations from some users and ask which of the speeds of the advertising engraving machine and the woodworking engraving machine is faster. This problem makes us unable to answer the results for a while, because it is faster to ask the two engraving machines. There is no standard answer to such questions. The speed of the speed is related to many parameters and configuration of the engraving machine. Therefore, today Nanjing Nanjing Speed ​​Carving Machine is here to give you an analysis of how to judge the speed of the advertising engraving machine and the woodworking engraving machine.
First of all, most of the domestic advertising engraving machines and woodworking engraving machines use the rack and pinion transmission method, except for some small advertising engraving machines, which are selected ball screw transmission structures. Then, what is the difference between the rack drive and the ball screw drive? According to common sense, we can understand that in the rack and pinion drive mode, the distance traveled by the motor every time the motor rotates is equivalent to the circumferential length of the gear. In the ball screw drive, the distance that the motor rotates one revolution is the lead of the ball screw. Commonly used ball screw leads are 5 mm and 10 mm. Therefore, under the premise that the woodworking engraving machine and the advertising engraving machine are all the same, the rack drive is much faster than the ball screw drive. .