Introduction of Diamond Grinding Wheel for Hobbing Cutter
Hob is an indispensable and important tool in gear processing, and its precision and life have a direct impact on the quality of gear processing. With the development of industrial technology, the demand for high efficiency and precision machining is increasing. Superabrasive grinding wheels (such as CBN grinding wheels and diamond grinding wheels) are widely used in the grinding of hobbing tools because of their excellent grinding performance. In this paper, we will discuss in depth the application of super-hard grinding wheels in hob grinding and analyze its process in detail.
First, the characteristics of super-hard grinding wheel:
Material composition
Super-hard grinding wheel is mainly made of cubic boron nitride (CBN) or diamond material. the hardness of CBN grinding wheel is second only to diamond, with very high wear resistance, especially suitable for grinding high hardness materials, such as high-speed steel, cemented carbide and so on. Diamond grinding wheels are more suitable for ultra-precision grinding of non-metallic materials and cemented carbide.
Wear resistance and thermal stability
Compared with traditional grinding wheels, the wear resistance of superabrasive grinding wheels is greatly improved, which not only has a long service life, but also maintains its stability under high-temperature conditions, and reduces burns and deformation of the workpiece during the grinding process.
High machining precision
Superabrasive grinding wheel has excellent self-sharpness, can maintain a sharp cutting edge, making the surface quality of the hob after grinding higher, less error.
Second, the process of grinding hob with superabrasive grinding wheel:
Preparation Before grinding hob, need to choose the appropriate type of superabrasive grinding wheel and grinding parameters. CBN grinding wheel is usually used for high-speed steel hob grinding, while the diamond grinding wheel is more suitable for carbide hob. According to the workpiece material and process requirements, determine the grit size of the grinding wheel, the type of bond and the grinding speed.
Selection of grinding parameters
The key parameters affecting the grinding quality of hob include depth of cut, feed speed and grinding wheel linear speed. Reasonable selection of parameters can effectively reduce the thermal stress, grinding force and residual stress on the workpiece surface. Generally, higher wheel speed and smaller depth of cut can bring better grinding results.
Cooling and Lubrication
During the grinding process, cooling and lubrication are essential due to the heat generated by friction. The use of high-efficiency coolant can not only take away the heat and prevent the surface of the hob from being burned, but also lubricate the grinding wheel and the surface of the workpiece, reduce the grinding force and improve the machining accuracy.
Inspection and dressing after grinding
The hob after grinding needs to undergo strict precision testing to ensure that its size and surface roughness meet the design requirements. In the process of continuous use, the surface of the superabrasive grinding wheel will fail due to abrasion, so it is necessary to regularly dress the grinding wheel to maintain its good machining performance.
Third, the advantages of grinding hob with superabrasive grinding wheel
High efficiency processing
Superabrasive grinding wheel has a high cutting speed, can realize high-speed grinding, significantly improve the processing efficiency.
Stable machining quality
Due to the good self-sharpening of the grinding wheel, less heat is generated in the process of grinding hob, which can effectively avoid the deformation or burn of the hob and ensure the shape accuracy and surface finish of the hob after grinding.
Long tool life
Superabrasive grinding wheels have extremely high wear resistance and long service life, which reduces the cost of frequent replacement of grinding wheels and prolongs the service life of the hob at the same time.
Fourth, super-hard grinding wheel grinding hob application examples
In aerospace, automobile manufacturing and other high-precision industries, super-hard grinding wheel grinding hob technology has been widely used. For example, in the manufacturing process of automotive gearbox gears, the high precision grinding needs of the hob prompted the widespread use of CBN grinding wheels, which not only improves the processing quality of gears, but also significantly extends the service life of the hob and reduces the processing cost.
Conclusion
Diamond grinding wheel grinding hob technology has become an important means in modern gear manufacturing by virtue of its high efficiency, precision and economy. In the future, with the continuous development of superhard materials and processing technology, the application prospect of superhard grinding wheel in hob grinding will be more broad.
Since its establishment, Henan Moresuperhard, as a system supplier, has been exclusively providing users with complete solutions. Developing correct and professional solutions for each user's needs helps users to be able to react quickly to changing customer demands and consolidate their market position.
The single bevel resin CBN grinding wheels produced by Moresuperhard can be used for hobbing cutter grinding, broach flute, back angle, contour grinding and so on.
Features of Moresuperhard hobbing cutter grinding wheels:
Good abrasion resistance and low wear.
Dry and wet grinding possible
High precision and reduced grinding forces
The materials used in current gear cutting tools can be grouped into four categories: carbide, ceramics, powder metallurgy HSS and high performance HSS, as well as various coatings. For broach and hob cutters made of these four different materials, Moresuperhard offers grinding wheels with different abrasives, different binders and different formulations to meet the needs of customers' different machining conditions and processes.
Broach grinding wheels are used for grinding internal broaches, external broaches, broaches with fir or dovetail grooves or inclined grooves. Compared with traditional grinding wheels, superabrasive grinding wheels have better shape retention and can grind better tooth contours and angles, which greatly reduces the scrap rate and improves the machining efficiency at the same time.
