(1) CBN grinding wheel can be made into a highly accurate tooth shape. Due to its high durability and infrequent trimming, it is not necessary to adjust the machine frequently, and stable tooth guide, lead and pitch accuracy can be obtained.
(2) It can realize high-speed grinding and high feed rate grinding tooth surface, low roughness and no burn, and can obtain high gear precision (6-7 grade) under the condition of improving grinding efficiency.
(3) CBN grinding wheel has long service life and good grinding performance, which saves many auxiliary time such as grinding wheel replacement and trimming, machine adjustment and workpiece inspection.
4. Application of CBN abrasive tools to process difficult-to-machine materials and difficult-to-machined surfaces
For the honing of hardened steel parts or chilled iron parts, CBN honing oil stone can be used. For high strength, high hardness and high heat sensitivity alloy steel, stainless steel, heat resistant steel and alloy, high hardness and high strength CBN should be adopted. The grinding wheel is cooled by an extreme pressure emulsion or a high speed grinding fluid. CBN grinding wheels are suitable for longer rail faces or complex profiles, camshafts for cam grinders, etc.
Promote the application of CBN materials in key machining processes. CBN materials can be used in high-speed cutting or grinding to improve product quality, improve machining efficiency, shorten machining cycle and reduce processing costs, whether it is used to make tools or make abrasive tools. Significant effect. Therefore, in the processing, the promotion of CBN knives (grinding) is a powerful measure to improve manufacturing technology. However, if it is widely used, there are still many problems.
In order to better promote the use of CBN knives (grinding) in production, the following aspects should be done:
1. Play the leading role of CBN knife (grinding) research institute
At present, there are many domestic CBN material manufacturers, and the output is also quite a lot, but the quality is not much, and the CBN knife (grinding) has fewer stable users. The main reason is that the mechanical processing department lacks the knowledge of the selection and use of expensive CBN knives. The purchased CBN tools are not effective, and under the conditions of economic contraction, they are not easy to invest in process testing. In order to solve this problem, only the CBN Knife Institute has taken the initiative to go deep into the manufacturing unit of mechanical manufacturing, select the weak link of production efficiency and quality, and has the point of having or easy to create CBN processing conditions, and negotiate with the user. Signed a joint development CBN application contract. The tool development unit is responsible for providing the CBN knife (grinding) for testing free of charge. The user is responsible for providing the tissue production test under the conditions required for the test. This has exerted a lot of enthusiasm. From CBN quality selection to tool manufacturing, it will be carried out at the optimal and fastest speed. From the preparation of test conditions to the use of the user, the user can see the achievement of the target value of the contract and solve it without spending the test fee. Production problems are easy to promote. The tool institutes can also gradually recover profits in future supply. As long as the two sides maintain mutual benefit and mutual benefit, the cooperative relationship will be further consolidated. Our factory has developed many new technologies with many research institutes (schools) in this way.
2. Realize the joint development of three points and one line, that is, CBN--tool manufacturing--user or CBN and tool manufacturing--machine tool--users jointly develop CBN application
The reasons are manifold, such as CBN quality, content, brand specifications and bonding agents are suitable for the processing of boron cast iron. As for the grinding effect of the CBN abrasives, there are more factors. In addition to the quality, proportion and abrasive manufacturing technology of the raw materials, there are conditions and techniques for use. Such as grinding speed (application of high-speed grinding speed), good rigidity of the grinding machine, no vibration, automatic fine feed and dressing compensation mechanism, appropriate grinding parameters and coolant, etc. These are all important factors that complement each other. Working together to improve the quality of their own products and promote each other, CBN tools and special equipment can be successfully used in production.
3. Actively carry out research on manufacturing and using technology of CBN knife (grinding)
Users want to use effective CBN tools. To this end, tool manufacturing units are required. In addition to improving the manufacturing technology of CBN tools as soon as possible, they should also establish clear identification standards and methods for product quality, and distribute certain performance parameters, such as tool CBN. The content and the brand, the hardness of the abrasive tool and the CBN precision and concentration, etc., on the basis of the production and use test, in order to give full play to the user's production experience, compare the different cutting parameters and the processing results obtained by the coolant, so that CBN tools have been improved in quality. The scope of CBN tools, the conditions of use and the technical support of the application (such as equipment and coolant), users can correctly select and use CBN tools.
4. Users need to improve product quality awareness and courage to improve manufacturing technology
The 21st century is a high-tech era. Products must have high performance and high quality to have a market, and enterprises can have vitality. To this end, the level of manufacturing technology should be improved as soon as possible, and the promotion of the use of CBN tools to improve manufacturing technology is a powerful measure, which not only requires strong funding and support from relevant authorities, but also systematically and systematically promotes the technical support of CBN tools. Use, but also requires users to accept new materials, new technologies, change the old obsolete production concepts and management methods, that is, the knife (grinding) has a low cost index, which only accounts for about 1/100 of the cost of the product, instead of In order to improve production efficiency and ensure product quality, this will limit the use of high-quality and efficient knife (grinding) tools and advanced equipment production capacity. Practice has proved that the effectiveness of CBN knives can not only improve the processing quality of products, but also improve economic efficiency.
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