The basic control principle of the grinding wheel dynamic balancing instrument is to detect and compensate for the unbalance of the grinding wheel vibration. Due to the uneven distribution of abrasive particles during the manufacturing process, the presence of pores, and the wear caused by surface unevenness and the addition of cutting fluid during the grinding process, a dynamic unbalance will be generated during the high-speed rotation of the grinding wheel, which will seriously affect the accuracy of the grinding machine and the accuracy of the workpiece being processed.
At present, the design of the grinding wheel dynamic balancing instrument is mainly based on the principle of mass compensation. By adding eccentric mass blocks of different masses on the grinding wheel flange, the unbalance generated during rotation is balanced with the vibration unbalance of the grinding wheel, achieving online automatic balancing compensation of the grinding wheel. We usually divide the methods of quality compensation into two types: fluid compensation and rigid body compensation. The balance principle between fluid mass compensation and rigid body mass compensation is fundamentally the same. Rigid body mass compensation uses rigid bodies to eliminate the vibration of the grinding wheel, so the vibration state information of the grinding wheel will not be lost when the grinder is stopped. This method is currently widely used; And 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 is stopped, so this method is less commonly used.
Function/Performance Description of On site Dynamic Balance Instrument Product:
1. The internal data storage can be used for program upgrade/data storage/printing reports/language conversion.
2. It has the functions of external balancing of various rotor lines before assembly and online balancing correction after assembly.
3. Suitable for online dynamic balance correction/monitoring/analysis of various rotors in machinery/motors.
4. Using frequency spectrum to analyze rotor vibration and present the actual vibration state.
5. Can be used for single-sided or double-sided dynamic balancing correction/monitoring/analysis of various rotors.
6. Can be used for converting vibration units, setting allowable vibration values, and presenting power status.
7. Dynamic balance correction can be performed using either weighted or de weighted methods.
8. Built in ISO1940 rotor balance level calculation
9. Add touch sensitive LCD.
10. Can be used for hole allocation/drilling depth calculation.
11. New rechargeable lithium battery/super standby time.
12. Added sensor detection function.
13. New USB Flash Disk/Compact Mini for easy portability.
14. Added indicator light function.
15. Added adjustable handle.
16. Add three dynamic balancing functions.
On site dynamic balancing instrument
At present, domestic and foreign surgical research institutions have achieved a lot of research results. The dynamic balancing instruments developed abroad have been mass-produced and serialized, such as the P7WB grinding wheel dynamic balancing electronic system produced by Marposs in Italy. As a representative of advanced foreign technology, this control system can continuously detect grinding wheel vibration and correct the imbalance of grinding wheels in production. The dynamic balance control device for grinding wheels is widely used in industrialized countries, but its price is relatively expensive for domestic manufacturers, and after-sales maintenance is extremely inconvenient. The research on the dynamic balance control device for grinding wheels in our country started relatively late, but in recent years, through cooperative production and technology introduction with developed countries such as Italy, Germany, and Japan, many important theoretical technologies have been formed. Relevant semi-automatic and fully automatic dynamic balance devices have been successfully developed and pushed to the market.
The rigid body mass compensation correction method is adopted in the vast majority of dynamic balance control systems. There are two eccentric mass blocks (eccentric ring gears) inside the dynamic balance head, which are driven by the rotation of the DC permanent magnet motor inside to adjust the position of the two eccentric mass blocks. This can obtain different balance forces. The centrifugal force caused by the unbalance of the grinding wheel will be equal to the combined force vector of the eccentric ring gears. If adjusted properly, the grinding wheel can be in the required dynamic balance state.
Different types of dynamic balancing heads have different balancing abilities and the motion patterns of their internal eccentric blocks are also different. However, they can be classified 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 in a circular motion around the center of rotation. Generally, we believe that when the two eccentric gear rings rotate in the same direction, the phase of the wheel unbalance can be weakened. Only when the vibration amplitude of the wheel is at its minimum, the phase balance process ends. At this time, adjust the two eccentric mass blocks to rotate in opposite directions and adjust the magnitude of their combined force. When the vibration amplitude of the grinding wheel is at its minimum again, the amplitude balance process ends. In the component coordinate method, the eccentric mass block moves along two mutually perpendicular straight lines, and we can obtain composite forces of different sizes and orientations to keep the grinding wheel in dynamic equilibrium. Usually, designing using polar coordinates makes it easier to design dynamic balancing heads and study balancing control algorithms.
At present, the design of the grinding wheel dynamic balancing instrument is mainly based on the principle of mass compensation. By adding eccentric mass blocks of different masses on the grinding wheel flange, the unbalance generated during rotation is balanced with the vibration unbalance of the grinding wheel, achieving online automatic balancing compensation of the grinding wheel. We usually divide the methods of quality compensation into two types: fluid compensation and rigid body compensation. The balance principle between fluid mass compensation and rigid body mass compensation is fundamentally the same. Rigid body mass compensation uses rigid bodies to eliminate the vibration of the grinding wheel, so the vibration state information of the grinding wheel will not be lost when the grinder is stopped. This method is currently widely used; And 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 is stopped, so this method is less commonly used.
Function/Performance Description of On site Dynamic Balance Instrument Product:
1. The internal data storage can be used for program upgrade/data storage/printing reports/language conversion.
2. It has the functions of external balancing of various rotor lines before assembly and online balancing correction after assembly.
3. Suitable for online dynamic balance correction/monitoring/analysis of various rotors in machinery/motors.
4. Using frequency spectrum to analyze rotor vibration and present the actual vibration state.
5. Can be used for single-sided or double-sided dynamic balancing correction/monitoring/analysis of various rotors.
6. Can be used for converting vibration units, setting allowable vibration values, and presenting power status.
7. Dynamic balance correction can be performed using either weighted or de weighted methods.
8. Built in ISO1940 rotor balance level calculation
9. Add touch sensitive LCD.
10. Can be used for hole allocation/drilling depth calculation.
11. New rechargeable lithium battery/super standby time.
12. Added sensor detection function.
13. New USB Flash Disk/Compact Mini for easy portability.
14. Added indicator light function.
15. Added adjustable handle.
16. Add three dynamic balancing functions.
On site dynamic balancing instrument
At present, domestic and foreign surgical research institutions have achieved a lot of research results. The dynamic balancing instruments developed abroad have been mass-produced and serialized, such as the P7WB grinding wheel dynamic balancing electronic system produced by Marposs in Italy. As a representative of advanced foreign technology, this control system can continuously detect grinding wheel vibration and correct the imbalance of grinding wheels in production. The dynamic balance control device for grinding wheels is widely used in industrialized countries, but its price is relatively expensive for domestic manufacturers, and after-sales maintenance is extremely inconvenient. The research on the dynamic balance control device for grinding wheels in our country started relatively late, but in recent years, through cooperative production and technology introduction with developed countries such as Italy, Germany, and Japan, many important theoretical technologies have been formed. Relevant semi-automatic and fully automatic dynamic balance devices have been successfully developed and pushed to the market.
The rigid body mass compensation correction method is adopted in the vast majority of dynamic balance control systems. There are two eccentric mass blocks (eccentric ring gears) inside the dynamic balance head, which are driven by the rotation of the DC permanent magnet motor inside to adjust the position of the two eccentric mass blocks. This can obtain different balance forces. The centrifugal force caused by the unbalance of the grinding wheel will be equal to the combined force vector of the eccentric ring gears. If adjusted properly, the grinding wheel can be in the required dynamic balance state.
Different types of dynamic balancing heads have different balancing abilities and the motion patterns of their internal eccentric blocks are also different. However, they can be classified 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 in a circular motion around the center of rotation. Generally, we believe that when the two eccentric gear rings rotate in the same direction, the phase of the wheel unbalance can be weakened. Only when the vibration amplitude of the wheel is at its minimum, the phase balance process ends. At this time, adjust the two eccentric mass blocks to rotate in opposite directions and adjust the magnitude of their combined force. When the vibration amplitude of the grinding wheel is at its minimum again, the amplitude balance process ends. In the component coordinate method, the eccentric mass block moves along two mutually perpendicular straight lines, and we can obtain composite forces of different sizes and orientations to keep the grinding wheel in dynamic equilibrium. Usually, designing using polar coordinates makes it easier to design dynamic balancing heads and study balancing control algorithms.
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