Editor's Note: The thin knife is an indispensable tool in the production of the carton. The quality and longevity of the thin knife directly affect the cost of the carton, so manufacturers generally pay more attention to the thin knife. However, the grinding wheel matched with the thin knife also has a great influence on the production quality of the carton. How to choose the appropriate grinding wheel with the thin knife is also an important issue that manufacturers need to solve.
The service life of thin knife directly affects the production cost and quality, and it is easy for carton manufacturers to pay attention to it. The supporting grinding wheel that affects the service life of thin knife is often neglected. Therefore, the compatibility of grinding wheel and thin knife is a problem that confuses the carton manufacturers. Let's unveil the wheel veil together below:
Now the material of the thin knife is basically divided into two kinds of high-speed steel and tungsten steel (hard alloy YG8), grinding wheel grinding materials capable of grinding these two materials are only superhard abrasives to choose from. Superhard abrasives are classified into diamond and cubic boron nitride. The corresponding grinding targets are tungsten steel (hard alloy YG8) and high-speed steel. For the grinding of tungsten steel, synthetic diamond is superior to natural diamond (NC). There are seven kinds of synthetic diamond abrasives, synthetic diamond code SCD is more suitable. There are two types of cubic boron nitride abrasives, and cubic boron nitride coded CBN is more suitable.
After the abrasive is selected, the choice of binder is particularly important. The main effect of the bonding agent is to bind a large number of small abrasive particles together to form a grinding wheel with a certain shape and necessary strength and hardness. Under the support of the bonding agent, the abrasive particles can grind the blades. When the abrasive particles are blunt, they can break and fall off in time, so that the grinding wheel can maintain a good grinding performance. There are six kinds of binders, and for the working condition of the thin knife, a resin binder is more suitable. It is based on thermoplastic phenolic resin as the main raw material, and also uses epoxy resin or polyimide resin as the main raw material, adding a certain amount of filler, such as chromium oxide, iron oxide, zinc oxide, copper powder, graphite, corundum abrasive, carbonization Silicon abrasives, etc., and superabrasives are thoroughly mixed at a certain concentration and heated and pressed in a mold.
There is a range of optimal abrasive grain sizes for the wheel that defines the bonding agent. In this range, the grinding wheel has the best grinding efficiency and wear. In general, the superabrasive grinding wheel of the resin binder is selected to have the best grain size within 100#, but the abrasive grain size of the grinding wheel in different grinding processes should be considered in consideration of the grinding requirements, the grinding conditions, and the optimal grain size range. Coarse grinding uses 80#-120#, semi-fine grinding uses 120#-180#, fine grinding uses 180#-W40, and grinding and polishing uses W40W1. Tungsten steel thin mirror high degree of mirror, cutting edge grinding precision requirements, should be selected in the 180 # -240 # particle size range, high-speed steel thin knife is selected in the 100 # -150 # particle size range.
Concentration is a unique concept of a superhard abrasive wheel. It represents the content of superhard abrasive per unit volume of the grinding wheel working layer. It is generally specified as superhard abrasive with 4.4 carats per cubic centimeter (1 carat = 0.2 g, 0.88 g/cm3). The concentration is 100%; the concentration increases or decreases by 25% for every 1.1 carats of abrasive that is added or subtracted. A total of 25%, 50%, 75%,
100%, 150% five categories. Concentration has a great influence on grinding efficiency and processing costs. If the concentration is too low, the grinding efficiency is not high; if the concentration is too high, many abrasive particles fall off prematurely and cause waste. The choice of concentration also depends on the type of binder, the particle size of the abrasive, the shape requirements, and the specific conditions of the processing steps and processing requirements. The optimum concentration range of the resin binder is 50-70%. The concentration of diamond grinding wheel used for grinding tungsten steel thin knife is 75%. Because high-speed steel thin knife has better toughness and hardness than tungsten steel thin knife, and cubic boron nitride abrasive grain is multi-edged, self-sharpening is good, so its concentration can be omitted. Higher than diamond wheel, usually 100% concentration.
After the above items are completed, how to organize is crucial. The wheel organization refers to the volumetric relationship among abrasives, binders, and pores. The pores refer to the voids that exist in the grinding wheel and have the function of containing wear debris, cooling, and heat dissipation during grinding. The pores are generally controlled by a formula, and some volatile substances such as naphthalene, coke, etc., which are calcined at a high temperature, are added to the abrasive of the abrasive wheel, and pores are formed after firing. Grinding wheel organization has a great influence on the grinding performance. Even if the grinding wheel hardness is the same and the organization is different, the grinding performance of the grinding wheel is also very different. When the grinding wheel is loose, the grinding efficiency is high, but the grinding wheel wears fast and the service life is short; when the grinding wheel is too tight, the efficiency is low, and it is difficult to accommodate the chips and burn the thin knife easily. The high-density wheel organization has a porosity of 0, the medium-density porosity is about 20-40%, and the low-density wheel organization has a porosity of about 40-60%. For the working conditions of tungsten steel thin knife, we choose high-density grinding wheel organization to facilitate the precision of the thin blade edge. For high-speed steel thin knife, we choose medium and high density wheel organization to facilitate heat dissipation.
To sum up, the user should tailor the grinding wheel to meet the requirements of the equipment according to the thin-knife material, line speed, and precision of the equipment.
In practice, the most important factors affecting the service life of thin knives and grinding wheels are the operating experience of the equipment operator, whether the wheel seat slides smoothly, whether the pressure, hydraulic pressure is appropriate, whether the tool holder angle is correct, the grinding frequency, time, Whether the method is proper or not is a factor that affects the service life of thin knives and grinding wheels.
The service life of thin knife directly affects the production cost and quality, and it is easy for carton manufacturers to pay attention to it. The supporting grinding wheel that affects the service life of thin knife is often neglected. Therefore, the compatibility of grinding wheel and thin knife is a problem that confuses the carton manufacturers. Let's unveil the wheel veil together below:
Now the material of the thin knife is basically divided into two kinds of high-speed steel and tungsten steel (hard alloy YG8), grinding wheel grinding materials capable of grinding these two materials are only superhard abrasives to choose from. Superhard abrasives are classified into diamond and cubic boron nitride. The corresponding grinding targets are tungsten steel (hard alloy YG8) and high-speed steel. For the grinding of tungsten steel, synthetic diamond is superior to natural diamond (NC). There are seven kinds of synthetic diamond abrasives, synthetic diamond code SCD is more suitable. There are two types of cubic boron nitride abrasives, and cubic boron nitride coded CBN is more suitable.
After the abrasive is selected, the choice of binder is particularly important. The main effect of the bonding agent is to bind a large number of small abrasive particles together to form a grinding wheel with a certain shape and necessary strength and hardness. Under the support of the bonding agent, the abrasive particles can grind the blades. When the abrasive particles are blunt, they can break and fall off in time, so that the grinding wheel can maintain a good grinding performance. There are six kinds of binders, and for the working condition of the thin knife, a resin binder is more suitable. It is based on thermoplastic phenolic resin as the main raw material, and also uses epoxy resin or polyimide resin as the main raw material, adding a certain amount of filler, such as chromium oxide, iron oxide, zinc oxide, copper powder, graphite, corundum abrasive, carbonization Silicon abrasives, etc., and superabrasives are thoroughly mixed at a certain concentration and heated and pressed in a mold.
There is a range of optimal abrasive grain sizes for the wheel that defines the bonding agent. In this range, the grinding wheel has the best grinding efficiency and wear. In general, the superabrasive grinding wheel of the resin binder is selected to have the best grain size within 100#, but the abrasive grain size of the grinding wheel in different grinding processes should be considered in consideration of the grinding requirements, the grinding conditions, and the optimal grain size range. Coarse grinding uses 80#-120#, semi-fine grinding uses 120#-180#, fine grinding uses 180#-W40, and grinding and polishing uses W40W1. Tungsten steel thin mirror high degree of mirror, cutting edge grinding precision requirements, should be selected in the 180 # -240 # particle size range, high-speed steel thin knife is selected in the 100 # -150 # particle size range.
Concentration is a unique concept of a superhard abrasive wheel. It represents the content of superhard abrasive per unit volume of the grinding wheel working layer. It is generally specified as superhard abrasive with 4.4 carats per cubic centimeter (1 carat = 0.2 g, 0.88 g/cm3). The concentration is 100%; the concentration increases or decreases by 25% for every 1.1 carats of abrasive that is added or subtracted. A total of 25%, 50%, 75%,
100%, 150% five categories. Concentration has a great influence on grinding efficiency and processing costs. If the concentration is too low, the grinding efficiency is not high; if the concentration is too high, many abrasive particles fall off prematurely and cause waste. The choice of concentration also depends on the type of binder, the particle size of the abrasive, the shape requirements, and the specific conditions of the processing steps and processing requirements. The optimum concentration range of the resin binder is 50-70%. The concentration of diamond grinding wheel used for grinding tungsten steel thin knife is 75%. Because high-speed steel thin knife has better toughness and hardness than tungsten steel thin knife, and cubic boron nitride abrasive grain is multi-edged, self-sharpening is good, so its concentration can be omitted. Higher than diamond wheel, usually 100% concentration.
After the above items are completed, how to organize is crucial. The wheel organization refers to the volumetric relationship among abrasives, binders, and pores. The pores refer to the voids that exist in the grinding wheel and have the function of containing wear debris, cooling, and heat dissipation during grinding. The pores are generally controlled by a formula, and some volatile substances such as naphthalene, coke, etc., which are calcined at a high temperature, are added to the abrasive of the abrasive wheel, and pores are formed after firing. Grinding wheel organization has a great influence on the grinding performance. Even if the grinding wheel hardness is the same and the organization is different, the grinding performance of the grinding wheel is also very different. When the grinding wheel is loose, the grinding efficiency is high, but the grinding wheel wears fast and the service life is short; when the grinding wheel is too tight, the efficiency is low, and it is difficult to accommodate the chips and burn the thin knife easily. The high-density wheel organization has a porosity of 0, the medium-density porosity is about 20-40%, and the low-density wheel organization has a porosity of about 40-60%. For the working conditions of tungsten steel thin knife, we choose high-density grinding wheel organization to facilitate the precision of the thin blade edge. For high-speed steel thin knife, we choose medium and high density wheel organization to facilitate heat dissipation.
To sum up, the user should tailor the grinding wheel to meet the requirements of the equipment according to the thin-knife material, line speed, and precision of the equipment.
In practice, the most important factors affecting the service life of thin knives and grinding wheels are the operating experience of the equipment operator, whether the wheel seat slides smoothly, whether the pressure, hydraulic pressure is appropriate, whether the tool holder angle is correct, the grinding frequency, time, Whether the method is proper or not is a factor that affects the service life of thin knives and grinding wheels.
PS Cutlery is a brand that specializes in high-quality cutlery products. They offer a wide range of knives, forks, spoons, and other utensils for both professional chefs and home cooks. PS Cutlery is known for its durable and sharp blades, ergonomic handles, and stylish designs. Their products are made from premium materials such as stainless steel, ensuring long-lasting performance and easy maintenance. Whether you need a set for everyday use or for special occasions, PS Cutlery has options to suit every need and preference.
PS cutlery, also known as polystyrene cutlery, is not as durable as other materials commonly used for cutlery like stainless steel or ceramic. PS cutlery is made from a type of plastic called polystyrene, which is lightweight and relatively brittle. It can break or snap easily under pressure or if mishandled.
In comparison, stainless steel cutlery is known for its strength and durability. It is resistant to bending, breaking, and corrosion, making it a popular choice for everyday use. Stainless steel cutlery can withstand heavy use and last for a long time with proper care.
Ceramic cutlery, on the other hand, is known for its hardness and sharpness. It is highly resistant to wear and tear, making it durable and long-lasting. Ceramic cutlery is also less prone to staining and does not retain odors or flavors from food.
Overall, PS cutlery is not as durable as stainless steel or ceramic cutlery. It is more suitable for single-use or occasional use situations, such as outdoor picnics or fast-food restaurants.
PS cutlery
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