Saint-Gobain: The secret to successfully dressing the wheel
We supply full range of abrasive tools, such as Flap Disc adhesive, Flap Disc Backing Pad, Abrasive Flap Disc, Flap Wheels , flap wheel with shaft, Abrasive Sanding Disc, Abrasive Machine , etc...
both one component epoxy adhesive and two component epoxy adhesive.
Specifications for single component epoxy adhesive for flap disc:
Appearance: Colloidal
Color: Blue / White
Odour: Slight odour
Proportion(water=1):1.42
Viscosity (25℃, mpa.s): 15000~20000
Storage time: 5℃ 6 months
Recommended curing condition: 110~130℃×4~3 hours or 150~160℃×1 hour
Hardness(Shore D): ≥90
Recommended temperture on the machine: 40-52 degree
Shearing strength(23℃, steel/steel, MPa): ≥22
Flap Wheel Glue Instructions
According to the ambient temperature, preheat adhesive among 41 ~ 46℃ before pumping into the pumping system.
Note:
1.When climate is colder, adjust preheating temperature 3 ~ 5℃ higher than normal.
2.Before use large quantities,a small quantity should be used for test.
3.This flap disc glue is a chemical product, can cause weak corrosive to skin, please note that the use of the appropriate protection, such as inadvertent contact with the skin with plenty of water rinse or alcohol wash.
4.Baking temperature is particularly important for product quality. The data provided by us is tested under accurate oven temperature control. We are strongly advised customer should adjust oven temperature according to the customer's on site condition.
Storage and transportation
Flap Disc Adhesive resin glue should keep in cool, ventilated warehouse, temperature does not exceed 40℃, relative humidity of not more than 85% ,this product is not special goods, according to the general cargo transport.
Flap Disc Adhesive Glue,Flap Wheel Glue,2 Component Epoxy Glue,Flap Wheel Adhesive,Epoxy Resin Flap Wheel Glue Zhengzhou Jiading Abrasive Manufacturing Co.,Ltd , https://www.abrasive-jd.com
In fact, an operator with high-quality dressing tools and skill in dressing the wheel can always maintain the grinding wheel with high grinding performance. Instead of relying solely on the purchase of so-called good Grinding Wheels . This is very important because the shop cannot be equipped with a special grinding wheel for each person's operation. Sharpening is a process of sharpening the abrasive grains of a super-hard abrasive wheel. In this process, it is necessary to remove the binder between the abrasive grains and the blunt abrasive wheel abrasive grains, so that the abrasive grains having strong grinding performance protrude from the bonding agent to 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 grinding force acting on the grinding wheel from increasing, and the grinding force on the grinding wheel is increased, which will cause vibration and cause burns on the surface of the part. Without proper sharpening, even the best grinding wheels are not likely to achieve high quality and dimensional consistency of the machined parts. In fact, when you invest in high-quality grinding wheels, it is very important to trim them well in order to achieve high grinding performance.
Shaping can be said to be part of the preparation of the grinding wheel, which is carried out simultaneously with the sharpening of the ordinary grinding wheel. For super-abrasive grinding wheels, the two processes are carried out separately, first shaping the grinding wheel. In the grinding with superabrasive grinding wheels, the shaping is carried out using a shaping tool or a roller. The sharpening is often a trimming rod using a ceramic bond. After the shaping is completed, the grinding wheel is sharpened. Before the grinding wheel includes shaping and sharpening, it is important to ensure that the spindle bearing is at a certain temperature (such as the normal grinding state of the grinding wheel). This avoids damage to the part geometry and abnormal wear of the grinding wheel and dressing tool. Tools for dressing must be handled with care because they are generally made of hard, wear-resistant but brittle diamond material and are very sensitive to minor impacts, microcracks and breakage caused by forces. Because the diamond shaper itself is a tool, it needs to be very sharp. Using a blunt trimming tool to trim the surface of the wheel will blunt the wheel. In order to maintain a high quality and sharp diamond dressing tool, it is necessary to rotate a single point or a tapered tip dressing tool at 1/8 turn at regular intervals. The number of rotations can be determined according to the trimming situation, and according to experience, it is rotated at least once a day. For chisel heads and shaped dressing tools, it is generally necessary to rotate 180° before they are blunt. Most cylindrical grinders place parts and 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 are called the part/grinding wheel contact point, and the diamond dressing tool should trim the grinding wheel as close as possible to the contact point of the part/grinding wheel. For grinding wheels for internal grinding machines, it is even more important to trim the diamond dressing tool near the highest point of the outer circle of the grinding wheel (ie, the part/wheel contact point at the time of grinding).
Micro-trimming To reduce the dressing time, there seems to be a temptation to choose a larger depth of repair. This is a very wrong idea. The grinding wheel must be trimmed with the most appropriate dressing depth. Choosing too large a repair depth will result in high cutting temperatures, reduced dresser life, and a useful wheel layer. The end result is damage to both the dresser and the grinding wheel, which is counterproductive. The optimum dressing amount is that after several repairs, it can restore the geometry of the grinding wheel and just produce a good grinding edge. With a single-point dressing tool, the diameter of the grinding wheel should be contacted with a 10-15° axial inclination angle. This will cause the single-point dressing tool to produce a sharpening effect when it is rotated periodically. A dressing tool with multiple points of contact does not need to tilt this angle. Instead, use the entire end face of the dressing tool to make contact with the surface of the grinding wheel. The lateral movement speed is the speed at which the dressing tool passes over the surface of the grinding wheel during trimming. It plays a key role in the surface roughness and metal removal rate required for machined parts. The lateral movement speed is too slow, which will block the grinding wheel and damage the surface roughness and metal cutting rate of the part. Too slow lateral movement speed can also cause the wheel to vibrate and burn the surface of the part. The even and fast lateral moving 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 part.
Keep Cooling Proper use of coolant can speed up dressing and improve dressing efficiency. As a rule of thumb, a 3/8-inch diameter coolant is used to remove a large amount of heat from the dresser and extend the life of the dresser. When the diamond dressing tool passes through the grinding wheel, install a coolant nozzle that fills the entire wheel surface or continuously fills the coolant to the diamond dressing tool. When the dressing tool is in contact with the grinding wheel and the dressing is started, the dressing tool must never be allowed to exit from the coolant. Otherwise, the diamond dressing tool will crack or crack under extreme cold and hot temperature changes. The filter is used for high-precision filtration of the coolant to avoid multiple cycles of dirt or chips in the coolant. The contaminated coolant can cause the grinding wheel to wear quickly and increase the number of dressings of the grinding wheel. The dry grinding of the grinding wheel is only carried out during dry grinding (only in this case the cooling of the diamond dressing tool can be broken). Before turning off the coolant every day before work, let the wheel idle for a few minutes. This will prevent the grinding wheel from rupturing.
Vibration is the enemy of dressing. It is essential to trim the wheel, effectively reduce the vibration, avoid leaving traces on the surface of the wheel, colliding and damaging the dressing tool. 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, it is also important to choose a high quality grinding wheel. If it is a high-quality grinding wheel, it can maintain a good balance of the grinding wheel with proper installation. According to the manufacturer's instructions from the grinding wheel manufacturer, the grinding wheel is marked with an upward arrow indicating the light end orientation of the grinding wheel after rough balancing. The user can then follow the arrows to pay attention to the dressing wheel to achieve dynamic balance. The coolant is evenly filled and sometimes helps the wheel to maintain balance.
In order to further avoid vibration, it is necessary to ensure that the dressing tool is firmly clamped on the holder and maintain a minimum amount of overhang to ensure sufficient rigidity of the dressing tool. If the diamond tool is not firmly clamped, it can cause vibration, generate noise, create ripples on the surface of the part, strain the surface of the part and damage the dressing tool.
Conclusion A super-hard abrasive wheel must be shaped and sharpened before it begins to grind. Following the experience presented in this article will help your grinding wheel produce the best grinding results.
