The origin of the carbide blade
Carbide Tool Industrialization applied to metal cutting began in the 1930s. Since then, the cement has evolved into the most common tool material to date. The relatively small size of the tool is often made of solid carbide; non-solid carbide cutting tool only in the cutting area using carbide. Early non-monolithic carbide cutting tools tend to weld carbide to the blade body. By the 1940s, carbide tool manufacturers had begun to produce tools that clamped the switchable blade and benefited. Compared to earlier welding tools, Carbide Inserts this brain hole in the technological innovation and the use of mechanical clamping structure makes the higher strength of the tool; now has been recognized as a landmark invention, not only in the field of tool manufacturing , But also for the entire metal processing industry to bring advanced and efficient processing.
This ambitious progress for the manufacturing sector to open a broad space for improvement, and immediately improve the carrying capacity of the tool, making the tool has the ability to quickly remove metal. In addition to the blade due to wear failure or failure to replace the blade when the blade becomes more simple and cost-effective to make the cost of protection, but also makes it possible to manufacture cutting modules and knife body. The replacement of the blade often takes into account its shape, the rapid replacement of the failure of the cutting edge in several ways, in addition to the center line along the blade transposition, Carbide Inserts but also reverse the blade on the positive and negative situation. The term "indexable blade", which is now widely recognized by the industry, has also been called a disposable blade, a replaceable blade, a replaceable blade.
Carbide blade production
Carbide Inserts The production technology of indexable inserts is based on powder metallurgy technology, the production process is as follows: Preparation of cemented carbide mixture; suppression; sintering; sintering process; coating. Although the basic processes remain constant for decades, the progress from science and technology has had a significant impact on blade manufacturing.
In the past, Carbide Inserts blade compacts were often pressed manually. Therefore, it is very difficult and even difficult to perform uniform sintering of the mixture compact having different pressing densities. With more and more advanced automation and computer-controlled advanced industrial equipment into the carbide manufacturing enterprises, carbide control of the production process more and more stable, controllable and reliable. Carbide Inserts The result is the production of a blade machinability become more consistent, predictable processing results due to the different blades without batch processing lead to different results; new technology also enables dimensional tolerances of the sintered inserts with a narrower, more accurate , Carbide blade performance has been greatly improved.
Nowadays, a typical blade press is often controlled by a computer-controlled highly assembled engineering device. Some presses can also be designed for multi-axial pressing.
Carbide blade production technology continues to evolve from a number of areas of development. More cutting-edge technology of pressing, sintering, post-coating technology and coating technology, Carbide Inserts more like surface treatment, can be processed more optimized cutting edges of the blades together so that manufacturing can indexable insert metal modernization The processing industry offers a more suitable solution to meet its efficient processing needs.
Carbide blade and steel (arbor) thermal expansion coefficient of a large difference, and the thermal conductivity of the alloy is also worse than the blade material, Carbide Inserts if the welding process is improper, will cause the Weld or stress is too large, in the course of the blade will appear Shedding or cracking phenomenon, a serious occurrence of welding or welding after the blade directly crack, affecting the life of the tool. Therefore, the welding process is critical to the life of the blade. Carbide blade welding the most commonly used mainly high-frequency welding and oxygen welding two processes. High frequency welding is easy to control because of the temperature, heating uniformity, high efficiency, welding quality stability has gradually become the blade of the main welding methods.
Carbide blade inspection
Before welding, please check whether the carbide blade is carburized, cracked, curved or convex uneven inequality. Brazing surface must be flat, if it is spherical or rectangular carbide brazing surface should also meet a certain geometric shape, to ensure that the alloy and the substrate has a good contact between in order to ensure the quality of brazing. Seepage serious (darker color, shiny shiny) of the blade, there will be Weld or welding on the phenomenon.
Carbide blade surfaces should be kept clean, no oxide and oil. Generally, the surface of the blade is sandblasted. Without the sandblasting equipment, the carbide can be held by hand and the oxide and black grades on the brazing surface are ground on the rotating green silicon carbide grinding wheel. If you do not remove the hardened alloy brazing surface oxide layer, solder is not easy to wet carbide. Experiments show that if the brazing surface if the oxide layer or black card letters, should be sandblasted, otherwise the solder is not easy to wet carbide, Carbide Inserts brazing seam will still appear obvious black letters, so that the brazing area decreased Desoldering phenomenon. After blasting carbide can be used gasoline, alcohol cleaning, to remove the oil.