Advanced and efficient tools are one of the important factors in manufacturing to improve processing productivity and product surface quality. In the high-end CNC machining center, a high-efficiency composite tool can be used to replace multiple single-function tools, and the machining of complex-shaped workpieces can be automatically completed according to the machining program, which has an excellent effect on improving production efficiency, surface quality and reducing production cost. Statistics show that the use of advanced and efficient tools can significantly improve the cutting efficiency, which may reduce the production cost of parts by 10%-15%, even if the cost of purchasing advanced and efficient tools is increased by 50%, which is reflected in the production cost of parts. About 1%, that is, the increase in tool costs is far lower than the decline in production costs. At the same time, advanced and efficient tools also have the benefits of reducing tool change time and improving product quality. Therefore, comprehensive considerations, the use of advanced and efficient tools to improve processing efficiency, reduce production costs is very significant, research and development and application of new advanced and efficient tools is one of the future development trend of machining.
When grinding high-efficiency tools, when the material, structure and shape of the tool and the selection of the grinding machine are determined, the grinding wheel becomes an important factor in determining the success or failure of the machining. The technical content of the grinding wheel and the quality of the grinding wheel determine whether it can produce high-quality tools that meet the design requirements.
Special metal bond strong slotted diamond grinding wheel (METROX)
As we all know, before 2007, Europe and Japan used ultra-high temperature resin bond diamond grinding wheels in the grooving of cemented carbide tools, and adopted the traditional large depth of cut and small feed grinding process. Due to the limitation of the resin bond diamond grinding wheel, the greater the depth of cut, the greater the grinding resistance, and the more grinding heat generated during the grinding process, which affects the machining efficiency of the tool slotting and the surface quality of the tool. In order to solve the above problems, in 2007, Europe began to optimize the tool grinding machine and diamond grinding wheel. In terms of grinding machines, the rigidity and power of the machine tool itself are increased (maximum power has reached 37 kW); in the aspect of diamond grinding wheels, a powerful grooved grinding wheel suitable for large depth of cut and large feed has been developed for use with high-power tool grinding machines. In order to double the production efficiency, it has achieved good results and is widely used in the market.
Prior to 2007, due to the characteristics of the Japanese market and the limitations of process equipment, ultra-high temperature resin bond diamond grinding wheels were still used in large quantities. Although the grinding wheel has high precision and good surface finish, since the grinding machine has low power (generally below 10 kW), the depth of cut per feed is also small, resulting in low efficiency of grooving and difficulty in meeting the ever-increasing market. demand.
After 2007, Japan Oriental and Shanghai Zhongyu Company developed and developed a special metal bond for large depth-cutting and large-feed grinding cemented carbide tools according to the international high-speed grinding development trend and the demand of the Chinese tool market. Grooved diamond grinding wheel (METROX). The grinding wheel adopts a special metal bonding agent, which solves the problem that the general metal bond grinding wheel produces "metal confrontation" when grinding the cemented carbide, and greatly improves the slotting processing efficiency of the cemented carbide overall tool. The grinding depth of the grinding wheel can reach a depth of 4 mm. Under this cutting depth, the feeding speed of the grinding wheel can reach 90-120 mm/min. At the same grinding depth, the feed rate of the ultra-high temperature resin bond diamond grinding wheel can only reach 50mm/min at most. If the feed speed is greater than this value, the resulting high temperature will cause oil mist, which will result in failure. Continuous processing.
When the groove is machined with METROX grinding wheel, the grinding temperature is low (the surface temperature of the grinding wheel is 30°C-70°C when tested), so the workpiece does not crack, burn and thermally deform. At the same time, due to the small loss of the grinding wheel, the dressing cycle and service life of the grinding wheel are prolonged. Due to the characteristics of the special metal bond, the grinding wheel has excellent wear resistance and can keep the grinding wheel sharp for a long time.
METROX grinding wheels can be used with high feed speeds. For example, when grinding a three-slot carbide tool with a diameter of 12 mm, a 30° helix angle and a groove length of 26.5 mm, the grinding depth is 4.0 mm and the wire speed is 16 mm/s. When the feed speed is up to 90-120mm/min, when grinding a four-slot carbide tool with a diameter of 16mm, a 30° helix angle and a groove length of 50mm, the grinding depth is 3.2mm and the grinding wheel linear speed is 16mm/s. The feed rate can reach 130mm/min.
Performance improvement of ultra-high temperature resin bond diamond grinding wheel
Although the processing efficiency of the ultra-high temperature resin bond diamond grinding wheel is lower than that of the METROX grinding wheel, the grinding wheel has high bonding strength, short production cycle and low processing cost, and is not easy to cause chipping when grinding the cutting edge of the tool, and can be used according to the use. It is required to be ground into a variety of shaped grinding wheels, so it is still widely used in production. How to further improve the grinding performance of such grinding wheels has also become an important task at present.
With the rapid development of tool design, manufacturing and use technology, and the increasing tool output, the ultra-high temperature resin bond diamond grinding wheel still cannot fully meet the requirements of mass production of tools, and its quantity and quality still have room for further development. . To this end, Shanghai Zhongyu Company is further researching how to improve the grinding performance of this grinding wheel, especially for the wear resistance of the bonding agent, the bonding strength of the bonding agent and the diamond abrasive and the self-sharpness, etc. Great progress has been made. The test results show that the improved grinding wheel grinding efficiency can be increased by about 20% on the original basis, and the grinding wheel life can be increased by about 50%.
Fiberglass Series
Since the foundation of our factory in 1996`s, we have been producing and dealing with various fiberglass products for more than 22 years. All the machine were designed and made by ourselves. In this case, we can offer you high quality products at competitive prices. We mainly provide you with the following items.
Fiberglass yarn, glass roving, woven roving, fiberglass mesh, fiberglass self-adhesive joint tape, Fiberglass Insect Screen, Chopped Strand Mat, tissue, fiberglass geogrid, fiberglass fabric and all kinds of coated cloth and glass textile wallcovering.
Fiberglass
Fiberglass Yarn,Fiberglass Mesh Tape,Chopped Strand Mat,Fiberglass Round Tube
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