1. The influence of the inner hole and outer diameter of the finger jointing knife on the finger jointing
If the inner hole tolerance of the finger joint knife exceeds the tolerance, the outer diameter of the finger joint knife will be affected. We install a set of finger-jointed knives on the shaft. Because the holes of individual knives are large, the knives may be installed misaligned. In this case, the outer diameter of the knives will be different. In addition, the outer diameter tolerance of finger-jointed knives is out of tolerance. The outer diameter of finger-jointed knives is different. The depth of finger-jointed materials processed by finger-jointed knives with different outer diameters is different. The tips and sides of the finger-jointed materials after splicing are different. There are gaps (commonly known as pinholes).
2. The influence of the angle of the finger jointing knife on the finger jointing
The angle of the finger joint knife here mainly refers to the bevel angle of the finger joint knife. When other conditions are the same, the smaller the bevel angle of the finger joint knife, the larger the contact surface of the finger joint, and the greater the strength of the finger joint. On the contrary, the greater the bevel angle of the finger joint knife, the smaller the contact surface of the finger joint, and the lower the strength of the finger joint.
3. The influence of the processing depth of finger jointing knife on finger jointing
The deeper the finger joint, the larger the contact surface of the finger joint and the stronger the finger joint. On the contrary, the shallower the finger joint, the smaller the contact surface of the finger joint, and the lower the finger joint strength. But the deeper the finger joint, the more material it consumes.
4. The influence of the accuracy of finger jointing knife on finger jointing
As mentioned earlier, the precision of finger-jointed knives includes flatness, parallelism, verticality, and end jump. Testing the accuracy of finger-jointed knives is a means of controlling the inherent quality of finger-jointed knives. The excessive flatness and parallelism of the base end surface of the finger-jointed knife will affect the end jump of the blade of the finger-jointed knife and the bevel angle of the finger-jointed knife.
5. Regular grinding of finger joint knives
After a finger-joint knife is used for a certain period of time, the cutting edge will become less sharp and the workpiece will be mushy. Therefore, the knife must be sharpened regularly. After grinding the tools, they should be placed in groups, because some tool groups have been ground once, and some tool groups have been ground several times, so the degree of wear of the tool groups is different. When grinding the tool, only grind the front side of the tool, and check the outer diameter of the tool after grinding. The rake angle and tooth top of the tool after grinding have changed, so the finger joint depth must be adjusted when processing the workpiece.
