"Easy to understand" diamond coating tool related matters needing attention
Diamond coated tool
Before choosing and using diamond-coated tools, users must understand the following common sense about diamond-coated tools:
The difference between CVD diamond coating and amorphous diamond coating The amorphous diamond (also known as diamond-like carbon-DLC) coating is a carbon film deposited by PVD or CVD. It has a part of diamond SP3 bond and a part of carbon SP2 bond; its film hardness is very high, but lower than the hardness of diamond film; its thickness is also thinner than the diamond film we usually deposit. When processing graphite, the lifetime of amorphous diamond coated tools is 2-3 times that of uncoated cemented carbide tools. In contrast, CVD diamond is a pure diamond coating deposited by CVD. The tool life when processing graphite is 12-20 times that of cemented carbide tools, which can reduce the number of tool changes and improve the reliability and precision of machining. consistency.
Cannot process hardened steel with diamond tools
Diamond is composed of carbon atoms. When some materials are heated, they absorb carbon atoms from the diamond and form carbides in the workpiece. Iron is one of these materials. When machining iron-based materials with diamond tools, the heat generated by the friction causes the carbon atoms in the diamond to diffuse into the iron, causing the diamond coating to fail prematurely due to chemical wear.
Diamond tool limit
The quality of diamond-coated tools that are reground and/or heavily coated is difficult to guarantee. Because the coating produced on the tool surface is pure diamond, it takes a long time to regrind the tool with a diamond grinding wheel. In addition, the tool used to grow the diamond. The preparation process changes the chemical properties of the tool surface. Since the coating requires very precise control of this chemical property, the effect of tool recoating is difficult to guarantee.
Diamond coated tools have different life spans
As with any other tool, the life of a diamond-coated tool varies, depending on the material being machined, the feed rate and cutting speed selected, and the geometry of the workpiece. In general, diamond-coated tools that process graphite are 10-20 times longer than uncoated cemented carbide tools and may even be longer in some cases. In this way, almost any machining task can be performed with a single tool without the need to change the tool due to tool wear, avoiding machining interruptions and recalibration, making it possible to achieve unattended machining. It is also possible to achieve longer tool life in the processing of composite materials. Titanium Machinery is the main product of the company, such as rotary top, screw, machine tool spindle, shaft processing, etc., professional quality assurance!
It has been reported that diamond coated tools can last up to 70 times longer than uncoated cemented carbide tools when processing difficult-to-machine composites such as high-density glass fibers, carbon fibers, and G10-FR4.
Problems with diamond tools
Peeling of diamond coatings can prevent coating flaking from being a serious problem for diamond coated tools and a common problem (especially when machining materials such as carbon fiber), which can lead to unpredictable tool life. In the late 1990s, interfacial chemistry was identified as an important factor affecting the adhesion of diamond coatings. By selecting compatible carbide chemistry, proper pretreatment techniques, and reasonable deposition conditions, it is possible to reduce or eliminate spalling of the diamond coating and achieve a stable wear pattern. Observing a normally worn diamond coated tool under a microscope, it was found that the diamond was stably worn up to the cemented carbide substrate without chipping or peeling.
What are the purchase considerations for diamond coated tools:
The most important part of a diamond tool is diamond, because the tool works mainly by cutting or grinding the diamond in contact with the object. Therefore, for the selection of diamond tools, that is, the selection of diamonds, let us introduce the reference points when selecting:
1. Selection of particle size When the diamond particles are very thick and only a single particle, the saw blade is very sharp, and the efficiency of sawing and cutting is extremely high, but the bending strength of the diamond agglomerate is reduced; the diamond particles are fine or thick. When the fineness is mixed, the saw blade can be used for a long time, but the relative efficiency is low. The number of particles of diamond selected between 50 and 60 is suitable.
2. Selection of distribution density If the density of diamond distribution changes from small to large, the sharpness and sawing effect of the saw blade will gradually decrease, and the application period will gradually become longer; however, the density will be too large, and the saw blade will Becomes not sharp. If the distribution density is low and the particle size is coarse, the efficiency will increase. When using each part of the cutter head, the effect is different when sawing and cutting. When using different concentration, the middle depression occurs in the operation of the cutter head during the sawing process, which is very beneficial for avoiding the yaw deflection of the saw blade.
3, the strength of the selection of too high intensity of the diamond will cause the crystal is not easy to be cut, the abrasive particles are polished at the time of application, the degree of sharpness is reduced, causing the performance of the tool to deteriorate; when the diamond strength is low, the crystal is encountered It is easy to break after the impact, and it is difficult to shoulder the responsibility of cutting. Therefore, it is best to choose a diamond strength between 13 and 140N.
When selecting a diamond tool, it is also necessary to pay attention to the selection of the binder phase and the selection of the diamond sintering process. Every aspect has a place to pay attention to, and must pay attention to it when selecting it.
Paper base Aluminum Oxide Hook and Loop Disc
Paper base aluminum oxide hook and loop discs are one kind of many velcro discs. This kind of velcro discs use D,E grade abrasive base paper as matrix, NBR, phenolic resin as binder, First class aluminum oxide as grain, also called as aluminum oxide velcro discs. Velcro discs are manufactured by complex procedures: pre-coating-make cost - coating -size coat - curing - flexing-molding compound - inspection-and packing procedures, etc. Velcro discs are commonly matched with electrical, pneumatic tools, widely used in wood processing,decoration and etc. This kind of sanding discs have the features of sharp, high efficiency and low cost.
Size: 4" 4.5" 5" 6" 7" 9", Round, Rectangle, Triangle, Iron, Mouse, other special size.
Grit: P24-P1200
BRIEF INTRODUCTION
Henan Yuteng Grinding Material Co., Ltd. is located in Kaifeng City, Henan Province. Is a set of production, research and development, service as one of the grinding agent, grinding, polishing products professional company, specializing in the production and sales of coated grinding tools derived ancillary products: flocking sand disc, blade, all kinds of special-shaped grinding disc, sponge grinding block, steel paper disk, ring sand belt, sand ring and automotive polishing products.
Our main products are Velcro Disc,Abrasive Paper,Fiber Disc, Flap Disc ,Abrasive Cloth,Abrasive Belt.
Relying on the advantages of the industrial base, the company has advanced production equipment and strong technical force, complete testing equipment to ensure that the products are sharp, wear-resistant and high strength, and the product quality reaches the advanced level of similar international products.
Our products can be used for all kinds of metal watches and stainless steel, alloy steel, non-alloy steel, non-ferrous metals, titanium alloy and other grinding and wire drawing, polishing and so on; Wood, high-medium fiberboard, flower board, composite board, glass, rubber and other table grinding and polishing. Widely used in automobile, steel, building materials, shipping, aviation, wood, plastic, leather and other industries.
We provide customers with the best surface treatment program, according to the actual needs of customers "tailored" a variety of specifications of sand pan, sand belt, sand carbon and emery cloth ring polishing products.
The company's flexible operating mechanism and all customer-centric concept, we in addition to provide you standardized, serialized products, but also according to your special requirements, for you to manufacture high-quality, personalized non-standard coated with abrasive products.
Paper Aluminum Oxide Velcro Disc,Paper Aluminum Oxide,Paper Aluminum Velcro Sanding Discs,Paper Aluminum Oxide Velcro Paper Disc
Henan Yuteng Abrasives Co.,Ltd. , https://www.henanyutengabrasives.com