With the birth of new materials, tool life has also multiplied, but the cost of new materials and the cost of manufacturing tools have not increased slowly, and will not necessarily bring double profits to manufacturers and consumers who use a large number of tools. . Professor Dika of the University of Kaiser in Germany and Dr. Lees of the University of Aachen, Germany, after years of research and practice, recommended a new simple tool processing process: dull. It doubles the life of the tool.
Guaranteed for processing quality Newly produced tools are generally required by manufacturers to ensure the sharpness of the tool front, but due to the different materials and processing techniques of the tool, the absolute sharpness is not achieved, generally less than 4mm. The same front face of the same tool will also produce an error greater than 1mm. Such a tool produces a frontal crevice during the first machining process, which reduces the quality of the work. In particular, coated tool openings are common and can sometimes result in damage to tools and workpieces. In addition, the machining error of the new tool and the old tool increases with the wear of the tool front, which reduces the consistency of the quality of the processed product.
The blunt-treated tool can basically avoid the above problems. When it is blunt, it will also shave the burrs and droplets generated during the tool production, and smooth and polish the workpiece to make the tool more beautiful and increase. The surface hardness and smoothness of the tool greatly improve the smoothness of the cutting. Especially for the passivated tool before coating, the coating will be more uniform, greatly reducing the risk of coating rips at the blade. Professor Dika has carried out a large number of research and experiments on rotary machining tools, such as drills, taps and milling cutters. From theory to practice, it sums up the feasibility of blunt and the enormous economic benefits that can be brought about.
The tool whose wear degree is processed by the blunt process can basically avoid the above problems, and the bluntness will also shave the burrs and droplets generated during the production of the tool, which makes the tool more beautiful and increases the surface hardness and precision of the tool. Greatly improved the smoothness of cutting. Especially before the coating, the passivated tool will make the coating more uniform, which greatly reduces the risk of coating the mouth at the blade. Professor Dika has carried out a large number of research and experiments on rotary machining tools (such as drills, taps and milling cutters), summarizing the feasibility of blunt and the enormous economic benefits that can be brought from theory to practice.
Increased length of workable workpieces The blunt process is divided into physical processing, heat treatment and chemical treatment. The most economical is the physical processing method, such as using the DF polishing machine produced by Otec, Germany.
The DF polishing machine makes the tool rotate in the abrasive to achieve the blunt requirement. It has the advantage of removing burrs and polishing the workpiece while being blunt, and can be adjusted according to the set processing time and steering procedure. With different abrasives, the tool of any material is blunt, and the operation is simple and flexible.
The blunt technology has been widely used in Germany. Germany Mercedes-Benz has a machining center that uses more than 80 kinds of drilling and milling tools. Originally, the tools that have not been blunt-treated are used. After 100 hours of processing, all the tools need to be updated. After using the blunt-treated tool, the processing time is extended to 240 hours, which improves the processing efficiency and reduces the processing cost.
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