An operator who has high-quality dressing tools and masters the skill of dressing the grinding wheel can always maintain the high grinding performance of the grinding wheel. Instead of just relying on buying so-called good grinding wheels. This is very important, because the workshop cannot be equipped with special grinding wheels according to the situation of everyone's operation.

　　Grinding wheel manufacturers share that sharpening is a process of sharpening the abrasive grains of superabrasive grinding wheels. In this process, it is necessary to remove the bond between the abrasive grains and the blunt abrasive grains of the grinding wheel, so that the abrasive grains of the grinding wheel with strong grinding performance protrude from the bond and form a sharp cutting edge. The sharpening must also remove tiny materials from the pores on the surface of the grinding wheel to prevent the increase of the grinding force acting on the grinding wheel, which will cause vibration and burn the surface of the parts.

　　Without proper dressing, it is impossible to achieve the high quality and dimensional consistency of machined parts with even a good grinding wheel. In fact, when you invest in high-quality grinding wheels, it is very important to dress them well in order to obtain high grinding performance.

　　Shaping can be said to be part of the preparation of the grinding wheel, which is carried out at the same time as the sharpening of ordinary grinding wheels. For superabrasive grinding wheels, the two processes are carried out separately, and the grinding wheel is first shaped. In grinding with superabrasive grinding wheels, shaping is performed using a shaping tool or roller, and dressing is often performed using a vitrified dressing rod. After shaping, the grinding wheel is sharpened.

　　Grinding wheel manufacturers believe that it is very important that the spindle bearing is at a certain temperature (such as the usual grinding state of the grinding wheel) before the dressing of the grinding wheel including shaping and sharpening. This avoids damage to part geometry and abnormal wear of grinding wheels and dressing tools. The tool for dressing must be handled with care, because it is generally made of hard, wear-resistant but brittle diamond material, and is very sensitive to small cracks and breakage caused by slight impact and force.

　　Because the diamond shaper is itself a knife, it needs to be kept very sharp. Dressing the wheel surface with a blunted dressing tool will dull the wheel. In order to maintain a high quality and sharp diamond dressing tool, it is necessary to rotate the single point or tapered dressing tool at regular intervals by 1/8 turn. The number of rotations can be determined according to the dressing situation. According to experience, at least one rotation per day. For chisel heads and shaped dressing tools, it is generally necessary to rotate them through 180° once before they become blunt.

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

　　Grinding wheel manufacturers feel that taking a small amount of dressing

　　To reduce trimming time, there always seems to be a temptation to choose a greater depth of trimming. This is an extremely wrong idea. The grinding wheel must be dressed with an appropriate depth of removal. Choosing too much trimming depth will generate high cutting temperature, reduce the service life of the dresser, and cut off the useful grinding wheel layer. The end result is to damage both the dresser and the grinding wheel, which is counterproductive. The best trimming amount is that after several times of trimming, the geometric shape of the grinding wheel can be restored, and a good grinding edge can just be produced as a criterion.

　　When using a single point dressing tool, it should contact the diameter of the grinding wheel at an inclination angle of 10-15° to the axis line. This will give the single point dressing tool a sharpening action when it is turned periodically. Dressing tools with multi-point contact do not need to be tilted at this angle. Instead, use the entire end face of the dressing tool in contact with the wheel surface.

　　The traverse speed is the speed at which the dressing tool passes over the surface of the grinding wheel during dressing. It plays a key role in the surface roughness and metal removal rate required by the machined parts. Traversing too slowly will clog the wheel, compromising the surface finish and metal removal rate of the part. Too slow a traverse speed can also cause the wheel to vibrate and burn the surface of the part. The uniform and fast lateral movement speed can trim the surface of the grinding wheel, improve the grinding performance of the grinding wheel, increase the grinding efficiency, and reduce the surface roughness of the parts.

　　Grinding wheel manufacturers remind to keep cool

　　Appropriate use of coolant can speed up the dressing speed and improve the dressing efficiency. As a rule of thumb, a 3/8 inch diameter coolant will remove a lot of heat from the dresser and extend the life of the dresser. When the diamond dressing tool passes the grinding wheel, install a coolant nozzle to fill the entire grinding wheel surface 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 be cracked or broken under extreme temperature changes of cold and hot.

　　High-precision filtration of the coolant with a filter can avoid multiple cycles of dirt or chips in the coolant. Contaminated coolant can wear the grinding wheel very quickly, increasing the number of grinding wheel dressings. Dry dressing of the grinding wheel is only used during dry grinding (only in this case the cooling of the diamond dressing tool can be interrupted). Before leaving get off work every day, after turning off the coolant, let the grinding wheel idle for a few minutes. This prevents the wheel from breaking.

　　Vibration is the enemy of trimming

　　In grinding wheel dressing, it is very important to effectively reduce vibration, avoid leaving dressing marks on the surface of the grinding wheel, collision and damage dressing tools, etc. This means that the grinding wheel must also be kept balanced, which is determined by the structural characteristics of the grinding wheel itself. Inhomogeneity in density and good or bad overall wheel geometry can affect the inherent balance of a wheel. Therefore, it is also very important to choose a high-quality grinding wheel.

　　If it is a high-quality grinding wheel, it only needs to be installed properly to keep the grinding wheel well balanced. According to the grinding wheel manufacturer's factory instructions, the grinding wheel is marked with an upward arrow, which indicates the orientation of the light end of the grinding wheel after rough balancing. Then the user can pay attention to dressing the grinding wheel according to the arrow to make it reach dynamic balance. The coolant fills up evenly, which also sometimes helps the grinding wheel stay balanced.

　　In order to further avoid vibration, the dressing tool should be firmly clamped on the holder and the overhang should be kept small so that the dressing tool has sufficient rigidity. If the diamond tool is not clamped securely, it can cause vibration, create noise, ripple on the part surface, strain the part surface and damage the dressing tool.

　　The above is all the content shared by the grinding wheel manufacturer. If you want to know more, please contact us!