Blog #fast working grinding wheel

The fast working grinding wheel type

Parallel long life grinding wheel: mainly used for cylindrical grinding and edge machining of cemented carbide.

Parallel arc grinding wheel: mainly used for forming grinding of hard alloy and forming grinding of circular arc surface.

Double-sided concave grinding wheel: mainly used for grinding measuring tools and coreless grinding machines.

Double beveled fast working grinding wheel: mainly used for forming grinding of hard alloy gear hobs and thread cutters.

Bowl-shaped grinding wheel: mainly used for sharpening of carbide tools, high-speed steel tools, and also for milling and grinding of hard alloy gear hobs and thread cutters.

There are two problems in the fast working grinding wheel grinding:

• The fast working grinding wheel quality: Mainly the grinding wheel must have good self-sufficiency and shape retention, and the two are often contradictory. 
• Grinding wheel dressing technology: that is, efficient and economical to obtain the required wheel profile and sharpness. Therefore, in order to improve the efficiency and precision of grinding, especially for the efficient finishing of difficult-to-machine materials, CBN grinding wheels are used for efficient and powerful grinding, which makes the powerful grinding break the limitation of traditional grinding, and the productivity is doubled. It does not need to be roughed and can be directly ground into finished products, which not only improves the processing efficiency, but also improves the processing quality. Such as SG abrasives.

In the grinding process, the correct choice of the fast working grinding wheel plays a decisive role in the efficiency of the machining.

When it comes to the fast working grinding wheel, it is often used in some workshops. It belongs to the grinding wheel and is made of abrasive and binder resin for ordinary steel, stainless steel and non-metal. The grinding wheel cutting piece is widely used. Ordinary steel, stainless steel metal and non-metal production and cutting materials, excellent materials and exquisite craftsmanship ensure high cutting efficiency and best economical effect on different material workpieces. However, the characteristics of the fast working grinding wheel will also have some performance on the grinding wheel. Impact, so, today Henan abrasives manufacturers come to talk to you.

1. Abrasive material: commonly used abrasives for the fast working grinding wheel are brown jade (A), white corundum (wA), black corundum (BA), black silicon carbide (c), etc. The most commonly used is brown fused alumina, because brown fused alumina has high hardness. It has the characteristics of high toughness, sharp particles, strong applicability and low price compared with other abrasives.

2. Abrasive grain size: common particle size is: 22#-80#, the cutting efficiency is low when the particle size is fine.

3. The fast working grinding wheel hardness: common hardness: P, Q, R; N, S; generally use harder grinding wheel to reduce grinding wheel wear. Its hardness is controlled by factors such as binder, molding density, firing temperature and firing time.

4. Bonding agent: common resin binders are: powdered phenolic resin, liquid phenolic resin. Powdered phenolic resin has good processability, the molding density of abrasive tools is slightly smaller, the tissue number is slightly larger, and the price is higher than liquid phenolic resin; liquid phenolic resin The price is low, but it is easy to agglomerate and the mixed materials are not easy to be uniform, which is easy to cause the abrasive tools to be partially hard.

5. Organization: The organization number of the fast working grinding wheel should be slightly larger to improve the cutting efficiency: too big and affect the strength. The commonly used organization number is 3~7.

From the above-mentioned Henan abrasives manufacturers, we can know that various abrasives are suitable for different materials to be cut. Therefore, different cut materials have a great influence on the cutting performance. Under normal circumstances, when cutting materials with high tensile strength, Corundum abrasive particles; when cutting materials with low tensile strength, use silicon carbide abrasive. Users can choose the appropriate fast working grinding wheel to cut different materials according to their own needs.

When operating the fast working grinding wheel, in order to increase its safety factor, some details must be paid attention to. Before starting to use the grinding wheel, please use it for one minute and then use it. When replacing the new type of fast working grinding wheel, please idle for 3 minutes before using it; Angle grinder with safety cover, cutting machine with safety cover.

Users must wear protective glasses, masks, earplugs, gloves, dust-proof clothes, etc., take protective measures, save the fast working grinding wheel in a place without direct sunlight, no moisture, and place it horizontally; if the inner diameter of the grinding wheel is small When the equipment does not match, please do not change the hole diameter of the fast working grinding wheel. Use the highest speed of the ultra-thin resin cutting piece and use the maximum number of revolutions.

The knowledge about the fast working grinding wheel is introduced here. If you want to know more, you can pay attention to Henan Aurora Abrasive Tool Co., Ltd. We specialize in grinding wheel cutting, grinding wheel ultra-thin development and production management. We will Sincerely for your service, welcome new and old customers to come to buy.

Do you know the density of abrasive wheels?

Abrasive concentration is different when grinding wheel production, different concentration of the finished product characteristics are different, China grinding wheel suppliers today take you to understand the concentration of grinding wheel, I hope it will be helpful to you.

Abrasive concentration is defined in powder compacted sintered or resin bonded grinding wheel sheets as containing 4.4 carats per cubic centimeter of volume. The thickness of the thin fast working grinding wheel is generally between 75-150.

Diamond grinding wheels use 50% - 100% concentration; most of them use 75%, which requires a higher smoothness can be lower than 75%. Forming grinding and longer service life requirements of the grinding wheel, can be used 100% or more;

The concentration of 25% - 150% is used in diamond products, of which the coarse-grained cutting saw blade and the concentration are generally lower, i.e. 25-50%, and the fine-grained one is higher; while the concentration of other metal bond grinding wheels is generally required to be 50% - 100%. Generally speaking, the concentration of coarse grinding is higher, that of semi-fine grinding is medium, and that of fine grinding and polishing is higher.

The China long life grinding wheel density is too low, cutting efficiency is not high, concentration is too high, grinding wheel strength is poor and grinding wheel consumption is large. So in production, we should pay attention to the concentration of the control, to ensure the quality of the grinding wheel.

Deformation of resin cutting abrasive wheels

The deformation of resin grinding wheel is a difficult problem that has puzzled the China grinding wheel suppliers of resin China long life grinding wheel for a long time. The root cause of deformation is the uneven microstructure in the effective area of the wheel, which leads to the uneven stress in the hardening process of the product.

Manufacturers of resin-bonded China long life grinding wheels should concentrate on solving the problems of mixture uniformity, molding uniformity and mesh stability. Only by gradually solving the above three problems can the deformation of resin-bonded grinding wheels (mainly cutting wheels) be solved.

Application field of grinding wheel

In general, peeling grinding is mainly applied in the following two areas:

(1) Replacing the traditional shaping cut-in grinding: CBN grinding wheels do not need to change grinding wheels and dressing tools frequently when processing different workpieces, which reduces grinding settings and adjustment time and improves processing flexibility; at the same time, the contact area between the fast working grinding wheel and the workpiece is smaller when peeling grinding (Fig. 3), so the required grinding force is also greater. Small, avoid grinding vibration and workpiece deformation due to excessive grinding force, and improve machining accuracy.

(2) Substitute for hard turning or as the follow-up process of hard turning: The use of CBN wheels for peeling grinding can improve the dimensional accuracy and surface processing quality of the workpiece.