This article presents the main opportunities, causes and countermeasures to vibrate the knife, which is enough to help you face the vibration of the problem of the knife in daily treatment.
Generally, when using towers for mechanical treatment, the so-called “vibrating knife” will occur in the following situations:
Form and turn with molding blades
Red to slim round rod
Outdoor circle of the Round Turning Meat Rod
Box -shaped parts (such as structural parts of sheet metal welding)
Super hard material cutting
The bearing has been damaged and continues to be cut, etc.
When a vibrating knife occurs, the vibrations of the tool, the part and the turn often cause hard noise inside the factory, and its amplitude is more than dozens of microns on one side, And sometimes it is as high as more than 100 microns. This type of vibration knife causes not only the relaxation of the tightening of the tool or the room, but also causes bad physical and mental effects on the operator because of its noisy noise. Not only will he consider the elimination of the problem of the knife as a great challenge with the tremor.
01
Basic methods
1. Forced vibration
It is a forced vibration caused by a cut or intermittent vibrations caused by defective rotary pieces.
Among these problems, the intermittent turning point is a technical problem of treatment, and most parts are derived from the assembly technology of the machine tool and the quality control of the key components, and are also linked to the concept of structural design of The machine tool. Vibration characteristics are directly linked to the scale of the revolution.
2. Auto-excited uibration
Indeed is caused by the excitement or self-frequency of the part of the part of the part is too low.
Since the natural frequency of the structure only changes with the tightening or fixing method, the modification of the cutting conditions (such as modification of the rotation speed) can often improve the cutting vibration when the vibrator is product. Modified (such as attack) the cut of the teeth or certain materials can not often be resolved by modifying the tightening method or even by modifying the method of fixing the tool or the tool.
02
Countermeasures to remove vibration knives
Depending on the principle of the vibration knife, there are currently more specific and practical methods used in treatment sites:
1. Try to choose all the conditions with a small cutting impedance, that is to say the supply speed of the most appropriate tools and the cutting speed (or the speed of the pin).
2. Adjust the cutting speed to avoid resonance.
3. Reduce the working weight of the part which causes vibrations, and the more small inertia, the better.
4. Attach or tighten the places with the largest vibration, such as the central frame, the winning carrier, etc.
5. Improve the rigidity of the treatment system, such as using a tool holder with a higher elastic coefficient or the use of special shock resistance with a dynamic shock absorber to absorb impact energy.
6. Work hard from the blade and the direction of the rotation of work (the work pushes the tool down while increasing the stability of the tool).
7. Modify the appearance and input angle of the tool, for example: the smaller the nose department, the better, to reduce cutting resistance. The roller angle must be positive to bring the steering of perpendicular cut closer. The angle of tilt of the back is preferably positive, but the capacity to remove the fleas is relatively mediocre.
8. The smaller the guidance angle, the better, it is better to be zero.
Daguang focuses on providing solutions such as precision CNC machining services (3-axis, 4-axis, 5-axis machining), CNC milling, 3D printing and rapid prototyping services.
