As the name suggests, multi-blade saw blades are saw blades that are installed and used together. Generally, alloy saw blades are the main ones.
Multi-blade saw blades are generally used for wood processing, such as: fir, poplar, pine, eucalyptus, imported wood and miscellaneous wood, etc. They are widely used in log processing, square wood processing, edge cleaning machines, furniture making and other industries. Simple Multi-blade saws can generally use 4-6 saw blades, and upper and lower axis multi-blade saws can use 8 saw blades, and can even be equipped with more than 40 saw blades, which greatly improves the work efficiency of workers. Multi-blade saw blades are equipped with a certain number of heat dissipation holes and expansion grooves, or multiple scrapers are designed to achieve better heat dissipation and smoother chip removal.
1. The outer diameter of the multi-blade saw blades
It mainly depends on the installation limit of the machine and the thickness of the cutting material. The small diameter is 110MM, and the large diameter can reach 450 or larger. Some saw blades need to be installed up and down at the same time, or left and right according to the requirements of the machine, so as not to increase the size. The diameter of the saw blade can achieve greater cutting thickness while reducing the cost of the saw blade.
2. Number of teeth of multi-blade saw blades
In order to reduce the resistance of the machine, increase the durability of the saw blade, and reduce noise, multi-blade saw blades are generally designed with fewer teeth. The outer diameter of 110-180 is about 12-30 teeth, and those above 200 are generally only There are about 30-40 teeth. There are indeed machines with higher power, or manufacturers that emphasize the cutting effect, and a small number of designs are around 50 teeth.
3. Thickness of multi-blade saw blades
The thickness of the saw blade: In theory, we hope that the saw blade should be as thin as possible. The saw kerf is actually a kind of consumption. The material of the alloy saw blade base and the process of manufacturing the saw blade determine the thickness of the saw blade. If the thickness is too thin, the saw blade will easily shake during operation, affecting the cutting effect. The thickness of the outer diameter of 110-150MM can reach 1.2-1.4MM, and the thickness of the saw blade with outer diameter of 205-230MM is about 1.6-1.8MM, which is only suitable for cutting softwood with low density. When choosing the thickness of the saw blade, you should consider the stability of the saw blade and the material being cut. At present, in order to reduce consumption, some companies have begun to produce multi-blade saw blades with single-sided convex plates or double-sided convex plates, that is, the sides of the middle hole are thicker and the inner alloy is thinner, and then the teeth are welded to ensure the cutting thickness. At the same time, the effect of material saving is achieved.
4. Aperture diameter of multi-blade saw blades
Of course, the aperture of a multi-blade saw blade depends on the requirements of the machine. Because multiple blades are installed together, in order to ensure stability, the aperture is generally designed to be larger than the aperture of conventional saw blades. Most of them increase the aperture and install special methods at the same time. The blue plate is designed with a keyway to facilitate the addition of coolant for cooling and increase stability. Generally, the aperture of 110-200MM outer diameter saw blades is between 3540, the aperture of 230300MM outer diameter saw blades is between 40-70, and the aperture of saw blades above 300MM is generally lower than 50MM.
5. Tooth shape of multi-blade saw blades
The tooth shape of multi-blade saw blades is generally dominated by left and right alternating teeth, and a few small-diameter saw blades are also designed with flat teeth.
6. Coating of multi-blade saw blades
After the welding and grinding of multi-blade saw blades is completed, they are generally coated, which is said to extend the service life. In fact, it is mainly for the beautiful appearance of the saw blade, especially the multi-blade saw blade with a scraper. The current welding level, scraper There are very obvious welding marks everywhere, so it is coated to preserve the appearance.
7. Multi-blade saw blade with scraper
Multi-blade saw blades are welded with carbide on the saw blade base, collectively called scrapers. Scrapers are generally divided into inner scrapers, outer scrapers and tooth scrapers. The inner scraper is generally used for cutting hardwood, the outer scraper is generally used for cutting wet wood, and the tooth scraper is mostly used for trimming or edge banding saw blades, but they cannot be generalized. Generally, the number of scrapers designed for 10 inches or less is 24. In order to maximize the effect of the scrapers, most are designed with outer scrapers. The number of scrapers designed for 12 inches and above is 4-8, with half inner scrapers and half outer scrapers, symmetrical design. Multi-blade saw blades with scrapers are a trend. Foreign companies have invented multi-blade saw blades with scrapers earlier. When cutting wet wood and hardwood, in order to achieve better cutting results, the saw blade will be reduced to burn flakes, increase the chip removal capacity of the machine, reduce the number of grinding times, and increase durability. However, it is difficult to sharpen the scraper of a multi-blade saw with a scraper. General equipment cannot be sharpened, and the price is relatively high.
