As the grinding process progresses, the grinding wheel will become dull, so continuous repairs must be made during use to make the grinding wheel sharp again. The following describes how to dress the grinding wheel to maintain higher grinding efficiency and quality. Grinding is the process of grinding the abrasive grains of super-hard grinding wheels. In this process, the bond between the abrasive particles and the blunt grinding wheel abrasive particles must be removed, so that the grinding wheel abrasive particles with strong grinding performance protrude beyond the bonding point to form a sharp cutting edge. Grinding must also remove tiny materials from the holes on the surface of the grinding wheel to prevent the grinding force acting on the grinding wheel from increasing. The increase in the grinding force on the grinding wheel will cause vibration and cause surface burns. Without proper grinding, even the grinding wheel cannot obtain the high quality and dimensional consistency of the machined parts. In fact, when you buy high-quality grinding wheels, in order to obtain higher grinding performance, it is very important to dress them correctly. It can be said that shaping is part of the preparation of the grinding wheel, and the preparation of the grinding wheel is carried out while grinding the ordinary grinding wheel. For super abrasive wheels, these two processes are carried out separately. First, reshape the grinding wheel. When using superabrasive grinding wheels for grinding, use forming tools or rollers for forming. Molding usually uses a dressing rod with a ceramic bond. After forming, the grinding wheel is sharpened. Before the dressing of the grinding wheel includes shaping and grinding, it is important to ensure that the spindle bearing is under temperature (such as the usual grinding wheel grinding state). In this way, damage to the geometry of the parts and abnormal wear of the grinding wheel and dressing tools can be avoided. Tools used for dressing must be handled with care because they are usually made of a hard, wear-resistant but very brittle diamond material and are very sensitive to small cracks and breaks caused by slight bumps and slight bumps. Since the diamond shaper itself is a tool, it must be very sharp. Using dull dressing tools to dress the surface of the grinding wheel will make the grinding wheel dull. In order to maintain high-quality and sharp diamond dressing tools, the single-point or cone dressing tools must be rotated 1/8 of a turn on a regular basis. The number of revolutions can be determined according to the trimming situation and experience, at least one revolution per day. For chisel heads and dressing tools, it is usually necessary to rotate it 180° before the blunt head.

Most cylindrical grinders place the parts and the grinding wheel on a horizontal line. The high point of the outer circle of the part and the high point of the outer circle of the grinding wheel is called the part/grinding wheel contact point. The diamond dressing tool should be as close as possible to the part/grinding wheel contact point to dress the grinding wheel. For the grinding wheel for internal grinders, it is more important to dress the diamond dressing tool close to the high point of the outer circle of the grinding wheel (that is, the part/grinding wheel contact point when grinding the hole).

　　 take a small amount of trimming

　　 In order to reduce the trimming time, it seems that there is always a temptation to choose a larger trimming depth. This is an extremely wrong idea. The depth of dressing must be selected to dress the grinding wheel. Choosing a too large dressing depth will produce high cutting temperature, reduce the service life of the dresser, and also remove the useful grinding wheel layer. The end result is damage to both the dresser and the grinding wheel, which is counterproductive. The amount of dressing is based on the criterion that it can restore the geometric shape of the grinding wheel and just produce a good grinding edge after several repairs.

Use a single-point dressing tool to contact the diameter direction of the grinding wheel with an inclination angle of the axis line of 10-15o. This will cause the single-point dressing tool to have a sharpening effect when it rotates regularly. The dressing tool that touches at multiple points does not need to be tilted at this angle. Instead, use the entire end face of the dressing tool to contact the surface of the grinding wheel.

　　 Lateral movement speed is the speed at which the dressing tool passes through the surface of the grinding wheel during dressing. It plays a key role in the surface roughness and metal removal rate required for machined parts. If the lateral movement speed is too slow, it will block the grinding wheel and damage the surface roughness and metal removal rate of the parts. Too slow lateral movement speed can also cause the grinding wheel to vibrate and burn the surface of the part. The uniform and fast lateral movement speed can dress a good grinding wheel surface, improve the grinding performance of the grinding wheel, increase the grinding efficiency, and reduce the surface roughness of the parts.

　　 keep it cool

　　 Appropriate use of coolant can speed up dressing and improve dressing efficiency. According to experience, choosing a 3/8 inch diameter coolant can remove a lot of heat from the dresser and prolong the service life of the dresser. When the diamond dressing tool passes through the grinding wheel, install a coolant nozzle to fill the entire surface of the grinding wheel or continuously add coolant to the diamond dressing tool. When the dressing tool is in contact with the grinding wheel to start dressing, never allow the dressing tool to withdraw from the coolant. Otherwise, the diamond dressing tool will crack or break under the extreme temperature changes of cold and heat.

　　Using a filter to filter the coolant with high precision, which can avoid multiple cycles of dirt or chips in the coolant. Contaminated coolant can quickly wear the grinding wheel and increase the number of dressings of the grinding wheel. Only in dry grinding (only in this case, the cooling of the diamond dressing tool can be interrupted), the dry dressing of the grinding wheel is adopted. Before leaving get off work every day, after turning off the coolant, let the grinding wheel run idle for a few minutes. This prevents the grinding wheel from cracking.

　　Vibration is the enemy of dressing

　　Jin Hengtai grinding wheel dressing, it is very important to effectively reduce vibration, avoid leaving dressing marks, collision and damage to dressing tools on the surface of the grinding wheel. This means that the balance of the grinding wheel must also be maintained, which is determined by the structural characteristics of the grinding wheel itself. The uneven density and the geometry of the entire grinding wheel will affect the inherent balance of a grinding wheel. Therefore, choosing a high-quality grinding wheel is also very important. If it is a high-quality grinding wheel, only proper installation can keep the grinding wheel in good balance. According to the factory instructions of the grinding wheel manufacturer, the grinding wheel is marked with an upward arrow, which indicates the position of the light end of the grinding wheel after rough balance. Then the user can follow the arrow indication and pay attention to dressing the grinding wheel to achieve dynamic balance. The even filling of coolant can sometimes help the grinding wheel to maintain balance.

　　In order to prevent vibration as much as possible, the operator must firmly clamp the dressing tool on the clamp seat and leave a small amount of overhang. Only in this way can the dressing tool have sufficient rigidity. If the diamond tool is not firmly clamped during the dressing process, it will inevitably cause vibration and severe noise, causing tiny ripples on the surface of the part, causing surface strain on the part and damage to the dressing tool.