The basic control principle of grinding wheel dynamic balancer is to detect and compensate the vibration imbalance of grinding wheel. Due to the non-uniform distribution of abrasive particles, the existence of air holes, the surface non-uniformity caused by wear during grinding process and the addition of cutting fluid, a dynamic unbalance will occur during the high-speed rotation of grinding wheel, which will seriously affect the accuracy of grinding machine and the workpiece being processed.
At present, the design of dynamic balancing instrument for grinding wheel is mainly based on the principle of mass compensation. By adding eccentric mass blocks of different mass to the flange of grinding wheel, the unbalance generated during rotation can be counteracted with the vibration unbalance of grinding wheel, and the on-line automatic balancing compensation of grinding wheel can be realized. We usually divide mass compensation into two types: fluid compensation and rigid body compensation. The balance principle of fluid quality compensation and rigid body mass compensation is fundamentally the same. Rigid body mass compensation is to take rigid body to eliminate the vibration of grinding wheel, so the vibration state information of grinding wheel will not be lost when the grinder stops. This method is used extensively at present. Fluid quality compensation uses fluid to eliminate the vibration of the grinding wheel, so the vibration state of the grinding wheel will be lost after the grinder stops, so this method is rarely used.
Function/Performance Description of Shenman Field Dynamic Balancer:
1. Embedded data storage can be used for program upgrade/data storage/printing reports/language conversion.
2. It has functions of off-line balancing of various rotors before assembly and on-line balancing correction after assembly.
3. Suitable for on-line dynamic balance correction/monitoring/analysis of various rotors of machinery/motor.
4. Rotor vibration analysis based on frequency spectrum presents real vibration state.
5. Various rotors can be adjusted/monitored/analyzed for one-sided or two-sided dynamic balance.
6. Vibration unit conversion and vibration allowable setting/power status presentation can be done.
7. Dynamic balance correction can be performed by weighting or de-weighting.
8. Calculation of rotor balance grade of built-in ISO1940
9. New touch liquid crystal.
10. Allocation of hole position/calculation of drilling depth can be done.
11. Add rechargeable lithium battery/extra-strong standby time.
12. Add sensor detection function.
13. New action disk USB Flash Disk/compact mini-portable.
14. Add indicator function.
15. Add adjustable lifting handle.
16. Three new dynamic balancing functions are added.
At present, domestic and international scientific research institutes have achieved a lot of research results. The dynamic balancing instrument developed abroad has been mass-produced and serialized, such as the P7WB grinding wheel dynamic balancing electronic system manufactured by Marposs, Italy. As a representative of advanced technology abroad, the control system can continuously detect grinding wheel vibration and correct the unbalance of grinding wheel in production. Grinding wheel dynamic balance control device is widely used in developed countries, but its price is more expensive for domestic manufacturers, and after-sales maintenance is extremely inconvenient. The research on dynamic balance control device of grinding wheel in our country started late, but in recent years, through cooperative production and technical introduction with developed countries such as Italy, Germany and Japan, many important theoretical technologies have been formed, and related semi-automatic and fully automatic dynamic balance devices have been successfully developed and put into the market.
The method of rigid body mass compensation correction is used in most dynamic balance control systems. There are two eccentric mass blocks (eccentric ring gear) inside the dynamic balance head. The eccentric ring gear is moved by the rotation of the DC permanent magnet motor inside the head and then the position of the two eccentric mass blocks is adjusted. In this way, different balancing forces can be obtained. The centrifugal force caused by the unbalanced grinding wheel is equal to the synthetic force vector of the eccentric ring gear. Proper adjustment will allow the grinding wheel to be in the dynamic balance state we require.
Different kinds of dynamic balancing heads have different balancing capabilities and different motion modes of eccentric blocks within them. But in summary, they can be divided into polar coordinate mode and component coordinate mode. In polar coordinate mode, two eccentric mass blocks are at the same distance from the center of rotation and can rotate around the center of rotation. Generally, we believe that when the two eccentric rings rotate in the same direction, the phase of the wheel imbalance can be weakened. When and only when the vibration amplitude of the wheel is at the minimum, the phase balance process ends. At this time, the two eccentric mass blocks can be adjusted to rotate in the opposite direction. By adjusting their combined forces, the amplitude balance process ends when the vibration amplitude of the grinding wheel is again at the minimum value. By means of component coordinates, the eccentric mass blocks move separately in two vertical straight directions, so that the synthetic forces of different sizes and directions can be obtained and the grinding wheel is in dynamic equilibrium state. Generally, the design in polar coordinates makes it easier to design the dynamic balance head and study the balance control algorithm.
笔记
At present, the design of dynamic balancing instrument for grinding wheel is mainly based on the principle of mass compensation. By adding eccentric mass blocks of different mass to the flange of grinding wheel, the unbalance generated during rotation can be counteracted with the vibration unbalance of grinding wheel, and the on-line automatic balancing compensation of grinding wheel can be realized. We usually divide mass compensation into two types: fluid compensation and rigid body compensation. The balance principle of fluid quality compensation and rigid body mass compensation is fundamentally the same. Rigid body mass compensation is to take rigid body to eliminate the vibration of grinding wheel, so the vibration state information of grinding wheel will not be lost when the grinder stops. This method is used extensively at present. Fluid quality compensation uses fluid to eliminate the vibration of the grinding wheel, so the vibration state of the grinding wheel will be lost after the grinder stops, so this method is rarely used.
Function/Performance Description of Shenman Field Dynamic Balancer:
1. Embedded data storage can be used for program upgrade/data storage/printing reports/language conversion.
2. It has functions of off-line balancing of various rotors before assembly and on-line balancing correction after assembly.
3. Suitable for on-line dynamic balance correction/monitoring/analysis of various rotors of machinery/motor.
4. Rotor vibration analysis based on frequency spectrum presents real vibration state.
5. Various rotors can be adjusted/monitored/analyzed for one-sided or two-sided dynamic balance.
6. Vibration unit conversion and vibration allowable setting/power status presentation can be done.
7. Dynamic balance correction can be performed by weighting or de-weighting.
8. Calculation of rotor balance grade of built-in ISO1940
9. New touch liquid crystal.
10. Allocation of hole position/calculation of drilling depth can be done.
11. Add rechargeable lithium battery/extra-strong standby time.
12. Add sensor detection function.
13. New action disk USB Flash Disk/compact mini-portable.
14. Add indicator function.
15. Add adjustable lifting handle.
16. Three new dynamic balancing functions are added.
At present, domestic and international scientific research institutes have achieved a lot of research results. The dynamic balancing instrument developed abroad has been mass-produced and serialized, such as the P7WB grinding wheel dynamic balancing electronic system manufactured by Marposs, Italy. As a representative of advanced technology abroad, the control system can continuously detect grinding wheel vibration and correct the unbalance of grinding wheel in production. Grinding wheel dynamic balance control device is widely used in developed countries, but its price is more expensive for domestic manufacturers, and after-sales maintenance is extremely inconvenient. The research on dynamic balance control device of grinding wheel in our country started late, but in recent years, through cooperative production and technical introduction with developed countries such as Italy, Germany and Japan, many important theoretical technologies have been formed, and related semi-automatic and fully automatic dynamic balance devices have been successfully developed and put into the market.
The method of rigid body mass compensation correction is used in most dynamic balance control systems. There are two eccentric mass blocks (eccentric ring gear) inside the dynamic balance head. The eccentric ring gear is moved by the rotation of the DC permanent magnet motor inside the head and then the position of the two eccentric mass blocks is adjusted. In this way, different balancing forces can be obtained. The centrifugal force caused by the unbalanced grinding wheel is equal to the synthetic force vector of the eccentric ring gear. Proper adjustment will allow the grinding wheel to be in the dynamic balance state we require.
Different kinds of dynamic balancing heads have different balancing capabilities and different motion modes of eccentric blocks within them. But in summary, they can be divided into polar coordinate mode and component coordinate mode. In polar coordinate mode, two eccentric mass blocks are at the same distance from the center of rotation and can rotate around the center of rotation. Generally, we believe that when the two eccentric rings rotate in the same direction, the phase of the wheel imbalance can be weakened. When and only when the vibration amplitude of the wheel is at the minimum, the phase balance process ends. At this time, the two eccentric mass blocks can be adjusted to rotate in the opposite direction. By adjusting their combined forces, the amplitude balance process ends when the vibration amplitude of the grinding wheel is again at the minimum value. By means of component coordinates, the eccentric mass blocks move separately in two vertical straight directions, so that the synthetic forces of different sizes and directions can be obtained and the grinding wheel is in dynamic equilibrium state. Generally, the design in polar coordinates makes it easier to design the dynamic balance head and study the balance control algorithm.
笔记
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