The key factors that can maximize the grinding performance of grinding wheels are good dressing and sharpening tools and skilled dressing skills. An operator with high quality dressing tools and skilled dressing skills can always maintain a high grinding performance of grinding wheels. This is very important, because the workshop can not be equipped with special depressed grinding discs in stock according to everyone's operation.
Trimming is a sharp process for grinding abrasive grains of super hard abrasive wheels. In this process, it is necessary to remove the bond between the grinding grains and the blunt grinding grains, so that the grinding grains with strong grinding performance can stand out from the bond and form a sharp cutting edge. Trimming must also remove tiny materials from the pores on the surface of the 4.5 inches grinding disc to prevent the increase of grinding force acting on the grinding wheel and the increase of grinding force on the grinding wheel, which will cause vibration and cause burns on the surface of the parts.
Without proper sharpening, even the best grinding wheels are unlikely to achieve high quality and dimensional consistency of machined parts. In fact, when you invest in high quality grinding wheels, it is important to dress them well in order to achieve high grinding performance.
Plastic can be said to be part of the depressed grinding disc in stock reparation work, and it is also carried out at the same time with the ordinary grinding wheel. For super hard abrasive wheels, the two process is carried out separately, first of all, the 4.5 inches grinding wheel is reshaped. In grinding with super-hard abrasive wheels, shaping is carried out by using shaping tools or rollers. Shaping is often done by using a dressing rod with a ceramic bond. After shaping, the 4.5 inches grinding disc is sharpened.
Before grinding wheels include shaping and sharpening, it is important to ensure that the spindle bearings are in a certain temperature, such as the normal grinding condition of the grinding wheel. This avoids damage to the geometry of parts and the abnormal wear of grinding wheels and dressing tools. Tools used for dressing must be handled with care, as they are generally made of hard, wear-resistant but brittle diamond materials and are very sensitive to small cracks and breakages caused by minor collisions and stresses.
Because diamond shaper itself is a tool, it needs to be very sharp. Using a blunt finishing tool to repair the surface of the depressed grinding disc in stock will make the wheel blunt. In order to maintain a high quality and sharp diamond dressing tool, it is necessary to rotate a single point or tapered dressing tool in 1/8 circles at regular intervals. The number of rotations can be determined according to the dressing condition. According to experience, rotation is made at least once a day. For chisel heads and moulded dressing tools, they must be rotated 180 times before they are blunt.
Most cylindrical grinders place parts and grinding wheels on a horizontal line. The highest point of the outer circle of the part and the highest point of the outer circle of the grinding wheel is called the contact point of the part/grinding wheel. The diamond dressing tool should dress the grinding wheel as close as possible to the contact point of the part/grinding wheel. For 4.5 inches grinding wheels used in internal grinding machines, it is more important to dress the diamond dressing tool near the highest point of the outer circle of the grinding wheel.
