A. After the saw blade is used for a certain period of time, the processed product effect will be unsatisfactory (such as bursts, burrs); when the energy consumption of the machine tool is significantly increased, it should be repaired in time.
B. Grinding alloy saw blades, especially imported high-end saw blades; precision, stable and vibration-free automatic CNC gear grinding machine tools should be used; and suitable diamond grinding wheels, the alloy heads must be ground according to the prescribed operating procedures, which will extend the saw Please do not use manual grinding equipment for the service life of the film.
C Before grinding, special cleaning agent (anti-rust, decontamination) must be used to wash off the resin debris and other debris stuck on the saw blade.
D When sharpening, pay attention to grinding strictly in accordance with the original geometric design angle; it is recommended to sharpen the front and back angles to ensure the longest service life.
In the grinding process of the gear grinder, the grinding wheel is worn and dull, and the grinding wheel needs to be trimmed to produce a new sharp profile while ensuring consistent accuracy. Grinding wheel dressing tools and dressing conditions have a significant influence on the quality of grinding wheel dressing, which directly determine the shape and profile accuracy of the grinding wheel. The sharpness of the dressing determines the grinding force and grinding temperature. It is necessary to select reasonable grinding wheel dressing parameters.
Choose a reasonable dressing speed ratio qd dressing wheel gear grinding machine. When the dressing speed is smaller than qd, the relative speed of the diamond roller and the grinding wheel is higher, the impact force is large, the grinding wheel abrasive grains are broken more, and the cutting edge formed is sharper, but the overall profile accuracy of the grinding wheel is slightly worse, which is suitable for rough grinding removal. Large grinding allowance; when the dressing speed ratio qd is larger, the relative speed between the diamond roller and the grinding wheel is smaller; the interaction force is mainly the extrusion force. After the grinding wheel is squeezed, the sharp corners are broken, forming more The micro-edge, the overall profile of the grinding wheel has high accuracy and is suitable for fine grinding. Through a lot of experimental research and production practice, it can be known that when dressing the grinding wheel, the linear speed ratio of the diamond roller to the grinding wheel is 0.3-0.8, the rough grinding is the small value, and the fine grinding is the large value.
The dressing depth affects the force characteristics of the abrasive grains of the grinding wheel. When the dressing depth is small, the abrasive grains of the grinding wheel will suffer less damage, resulting in microscopic crushing, forming micro-edges, high profile accuracy, suitable for fine grinding; The grains are broken and shattered under force, and part of the bonding agent falls off, forming a sharp cutting edge and chip holding space, suitable for rough grinding. The choice of dressing depth should consider the size of the abrasive grains of the grinding wheel, so as to avoid the excessive amount of dressing that will cause the abrasive to fall off as a whole, which wastes abrasives and is difficult to form an accurate profile.
The diamond roller is made by electroplating or sintering, and the abrasive is natural diamond or various synthetic diamonds, such as CVD, PCD, etc. During the dressing process, heat is generated and the stability of the diamond abrasive is destroyed. The cutting heat causes the grinding wheel to be cladding and causes blockage. Coolant is needed to take away the friction heat during the dressing of the grinding wheel in time, clean the grinding wheel, wash away the chips, improve the dressing accuracy and extend the life of the roller .