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The abstract picture is published by Professor Liu Guangchang on behalf of Professor Wang Guangzu, a superhard material expert. The report titled "To tell the development of superhard material abrasive belts" is the foundation for the development of superhard abrasives with superhard abrasives. It is the key; China is the world's super The superpower of hard material production, 2013 artificial gold...
The picture shows Liu Jinchang on behalf of Professor Wang Guangzu, a superhard material expert, who published a report entitled "Telling Development for Superhard Material Belts"
The development of superhard material abrasive belt superhard abrasive is the foundation, which is the key; China is the superpower of superhard material production in the world today. The output of synthetic diamond in 2013 is 15.4 billion carats, accounting for 90% of the world's total output. The output of cubic boron nitride is about 5.4 billion carats, accounting for 60% of the world's total output, abrasive grain size from micron to nanometer scale, complete product variety, rich resources, cheap and good quality, all-weather supply, to meet the high-speed development of super-hard abrasive belt, do big There is no suspense. Such solid and rich basic material conditions are not China! What a good condition! Why not develop? What is the reason? It seems that some people don't understand! ! This is one of them.
Application is power, it is the market. Here, Suzhou Far East Grinding Wheel Co., Ltd. quotes two major passages in the article "Summary of Digestion and Absorption Technology of Introduced Abrasives": They say that abrasives are known as "industrial teeth", while coated abrasives are known. For "industrial beautician". The application of grinding tools for coated abrasives is important in the national economy. It is widely used in aerospace, aviation, automotive, marine, machine tools, chemical, construction, metallurgy, energy equipment and other manufacturing industries and wood, glass, etc. light industry. Excellent coarse grinding, fine grinding and polishing for metal, non-ferrous metals, wood, furniture, stone, glass, ceramics, plastics, leather, lacquer, etc.
In the industrially developed countries of the United States, Germany and other countries, the sales of coated abrasives ranks first among the three major abrasives. According to statistics, the proportion of coated abrasives, bonded abrasives and superhard abrasives in the three major abrasives series of the famous abrasives and abrasives companies in the United States is 48:40:12. This proves the importance of coated abrasives, which are undoubtedly the largest and most promising products in coated abrasives. Its rapid development has also pushed the entire coated abrasive production technology to a high level. The high-tech direction has advanced, so that the coated abrasive tools have entered the production stage of mechanization, automation and linkage. The variety of products has increased greatly, the quality has become more and more perfect, and the scope and field of application have expanded rapidly.
From the above, we can at least realize two points: First, the application range of the coated abrasive grinding is really exciting! The prospect is very attractive; secondly, in view of the shortcomings of the curing of traditional coated abrasive products, the developed countries have carried out research on online rapid curing, and have achieved success, not only high efficiency, but also high comprehensive cost performance. And we all use the curing oven to cure the production, so the gap is very large, has fallen behind the world's low carbon energy-saving development trend.
The predecessor of Suzhou Far East Grinding Wheel Co., Ltd., Suzhou Grinding Wheel Factory, is an old-fashioned enterprise with high influence and high reputation in the abrasives industry in China. So I was thinking, if the old-fashioned enterprises like Suzhou Grinding Wheel Factory can play a leading and demonstrating role in accelerating the development of high quality, high speed and high efficiency of super hard belts in China, how good it is!
“Coated Abrasives†is the general name for sandpaper, abrasive cloth and abrasive belt. The term “coated abrasives†was translated in English in the 1960s by the English “Coated Abrasivesâ€.
According to the terminology standard for abrasives developed in China, the coated abrasives are “abrasives made by adhering abrasive particles to a flexible substrate with an adhesiveâ€. This article only elaborates on how the superhard material abrasive belt develops rapidly and its related technical problems.
1. Why should we develop abrasive belt grinding?
The reason why the abrasive belt grinding technology has received increasing attention and rapid development is determined by its following important characteristics:
(1) Abrasive belt grinding is an elastic (flexible) grinding. It is a composite processing technology with various functions of grinding, grinding and polishing.
(2) Because of the particularity of the sand-grown sanding method, more than 95% of the abrasive grains are on the working surface, and the exposure is high, the self-sharpness is good, the abrasive grain utilization rate is high, and the grinding ability is stronger, so Abrasive belt grinding is very efficient and is a good energy-saving green processing tool.
(3) Abrasive belt grinding surface quality is high. Abrasive belt grinding has good chip and chip removal, low grinding temperature, and is called “cold†grinding. The surface of the workpiece is not prone to burns.
(4) Abrasive belt grinding and polishing system has small vibration and good stability.
(5) The main performance is that the surface roughness is very small, and it has reached Ra 0.001 μm at present, and it is easy to reach Ra 0.1 μm by using an ordinary belt portion.
(6) The surface roughness is indistinguishable from the naked eye, and it is a microscopic, geometrical error. The greater the surface roughness, the rougher the surface of the workpiece, and vice versa.
(7) The residual stress on the grinding surface of the abrasive belt is mostly in the state of compressive stress, while the grinding of the grinding wheel is mostly tensile stress. With abrasive belt grinding, there are few phenomena such as surface burns, microscopic changes and cracks in the workpiece, especially when grinding heat-resistant and difficult-to-machine materials.
(8) Abrasive belt grinding precision is high. Abrasive belt grinding has long entered the ranks of precision and ultra-precision machining with a maximum precision of 0.1 μm.
(9) Low cost of abrasive belt grinding (10) The weight of the abrasive belt is light, and the convenient loading and unloading is a remarkable feature of abrasive belt grinding;
(11) The power used in the abrasive belt grinding machine is only 2/3--1/3 of the power used by the grinding wheel machine tool, and the energy saving effect is obvious;
(12) Even if the belt is broken during the grinding process, it will not cause harm to the human body, and it has obvious features of safety.
(13) Grinding and polishing of large-area material planes such as steel plates, wood boards and fiberboards;
(14) The abrasive belt grinding process has great flexibility and adaptability. In developed countries, such as Germany and the United States, belt grinding machines account for about one-third to one-half of the total grinding machine. That is to say, there is a belt grinding machine corresponding to a grinding wheel grinding machine.
Superhard abrasive belts can be divided into diamond abrasive belts and cubic boron nitride abrasive belts according to different abrasive materials. Diamond sand belt is used for processing non-ferrous metal materials, glass, ceramics, gemstone and other hard and brittle materials; cubic boron nitride belt is mainly used for processing steel parts and manufacturing cubic boron nitride belts for various belt grinding machines.
2. Why do you want to develop high-speed abrasive belts?
(1) Superhard abrasive belt has the dual characteristics of “hard†of super-hard material and “soft†of coated abrasive. It is the best combination of “just†and “softâ€, which conforms to modern high speed, high efficiency, precision and festival. The strategic requirements for the development of materials, energy conservation and environmentally friendly processing technologies have important technical and economic value.
(2) Superhard material abrasive belt is not only a high-tech coated abrasive product, but also a high value-added and high-efficiency product. Its quality and level often indicate the level of production and processing of a national coated abrasive, and it can also bring High economic efficiency. Efforts to develop superhard abrasive belts are feasible and inevitable.
(3) The high life of diamond abrasive belt is more than 5,000 times that of silicon carbide abrasive belt. It is especially suitable for processing hard and brittle hard-to-machine materials or high-precision, ultra-high-precision products for special purposes, such as the casting of hard alloy parts. Grinding, gemstone, ceramic soft grinding wheel shaped polishing and dental diamond belts.
(4) Cubic boron nitride sand belt is more suitable for the processing of steel parts by abrasive belt grinding machine, from general belt surface grinder, internal and external cylindrical grinder to CNC multi-station automatic belt grinder in machinery industry and automobile manufacturing. Applications are growing. The fierce competition in the domestic auto market, the sharp decline in the profit of the products, will certainly create vitality for the application and market sales of domestic superhard materials coated abrasives. It should be firmly believed that diamond belts and cubic boron nitride belts with superior performance and high life expectancy will become important tools for belt grinding machines in the future.
(5) Super-hard abrasive belts are highly doubtful due to their high efficiency, long life and high surface quality and environmental protection characteristics, especially as the price of super-hard materials decreases.
(6) In the western developed countries, from the purpose of human health and the environment, the use of abrasive materials such as superhard materials such as sandpaper and abrasive cloth has been gradually used to replace ordinary abrasive coated abrasives such as corundum and silicon carbide. This is an inevitable and unstoppable trend and direction for the development of modern processing technology.
(7) Because of its high hardness and good wear resistance, superhard materials use it as an abrasive to process hard and brittle workpieces, such as hard and brittle, which consumes very little, and can maintain its sharpness and tool shape for a long time. Not only can the processing accuracy of the workpiece be guaranteed, but also the processing time is improved, and the pollution problem to the environment is also solved, which is consistent with the topic of the low-carbon era that everyone is hotly discussing!
(8) China has a huge gem processing industry, ceramic processing industry, wood processing industry, automobile industry, machinery processing industry, etc., and is the world's largest wood and furniture processing base. So many processing fields are super hard material coating grinding. It has great potential. There is a place to use it, and hesitate! It is said that the price of superhard materials is expensive.
Here is a question about how to treat the price of super-hard materials "expensive". Compared with ordinary abrasives, the price of super-hard abrasives is indeed more expensive than corundum and silicon carbide, but it should not become difficult to develop and apply super-hard materials. Reasons or obstacles! We must know that China is not only a superpower in the world in the production of superhard materials, but also a big exporting country. Its price is the cheapest, so where to find such superior material conditions!
In addition, high-performance, high-life, cost-effective, and the use of super-hard materials coated abrasives is a high-efficiency, high-efficiency tool consideration, in China does not accelerate the development, production and application of superhard material coated abrasives The pace is a bit incredible! I believe that there will be people of insight who join the ranks of developing, producing and applying superhard abrasive belts. Because it shows the development trend and direction of modern processing technology.
(9) Abrasive belt grinding technology has entered a new stage of modern development. Developed countries in Europe and the United States attach great importance to the development and application of abrasive belt grinding technology. Especially noteworthy is the successful application of superhard material abrasive belts, which make it difficult to grind difficult materials such as cemented carbide, gemstones, ceramics and titanium alloys. Other aspects show unique advantages. From the grinding of workpieces with general precision requirements to the grinding of high-precision, ultra-high-precision parts, to the successful application of grinding and polishing of precision parts such as magnetic disks, magnetic heads, video cameras, copiers and optical fiber guides.
(10) Due to the application of super-hard material abrasive belt, the working life of the abrasive belt is greatly improved, and the grinding field is also expanding, which can be used for wet grinding, dry grinding, fine grinding, and re-grinding of large knife depth. Sharpening and high precision precision parts grinding and polishing. In short, the abrasive belt grinding technology of advanced countries in foreign countries has developed rapidly and is widely used.
(11) The need for the development of new difficult materials for the aerospace industry;
3. The development of China's coated abrasive industry is roughly divided into three stages.
The first stage was characterized by sheet-like abrasive cloth sandpaper from the 1950s to the end of the 1960s.
In the second stage, from the early 1980s to the mid-1990s, Ersha and Shangsha successively introduced a complete set of coated abrasives production lines from the Federal Republic of Germany, which made the coated abrasive industry in China achieve a qualitative leap.
The third stage starts from the end of the 20th century, until the current (2010) has the following characteristics in the abrasive section, the author noticed the emergence of a variety of new abrasives such as P abrasive, silicon carbide, semi-brittle corundum, zirconium corundum, etc. The artificial diamond and cubic boron nitride super hard abrasives are not mentioned at all, which is a bit of awesome.
4. Some superficial views on the rapid development of superhard abrasive belts
(1) There must be a clear goal, that is, the coated abrasive industry should take the high-speed development of super-hard abrasive belts as the top priority in the 13th Five-Year Plan.
Benny, a famous British company, once said: "A staff with a goal in mind will become a person who creates history. An employee who has no goal in his heart can only be an ordinary employee."
A clear goal can motivate one's initiative, creativity, competitiveness, determination and a positive attitude, and ultimately help them stand at the top of their success.
Anyone who succeeds in starting a business must have a clear goal, and they know what they are living for. With a clear goal, there is a driving force for progress. With the goal, there is enthusiasm, enthusiasm, and a sense of mission.
(2) There must be a team-awareness saying that “all people collect firewood and high flamesâ€. It is difficult for a person to achieve self and to make a career. It is difficult to achieve it by relying on the individual's strength. When Microsoft founder Bill Gates talked about teamwork, he said this: "This spirit creates an atmosphere in which pioneering thinking is constantly emerging and employees' potential is fully realized. Play."
In fact, this team awareness is not unique to Microsoft. This kind of team consciousness that attributes individuals to the collective is also pursued and cultivated by many companies. Team awareness makes employees' work enthusiasm and work experience deeper, making their lives more valuable and meaningful.
In the current era of rapid development of the knowledge economy, the collective wisdom is always greater than the individual's wisdom, and the collective power is always greater than the individual's strength. Perfect people will inevitably have weaknesses and defects. In a team, each member can make up their own advantages and make up for the shortcomings, thus forming a powerful force.
(3) To have innovative thinking "Innovative thinking" has been increasingly entering our lives and work in recent years. The so-called innovative thinking refers to the ability of people's existing knowledge and experience to develop new fields, that is, the original thinking of pursuing the best and latest knowledge in the field of thinking. Einstein once said: "Innovative thinking is a novel and valuable thinking ability that is highly mobile and persistent, and can clearly sketch and solve problems." It can be seen that innovative thinking is not born, but people. Continuously cultivated and developed in learning and practice. There is no end to the road to innovation, it is based on practice. It’s not a waste of time to break through the iron shoes, and innovators often have such epiphanies.
(4) There must be "ambition". Research by psychologists shows that "ambition" is a key factor for success. In today's society, we should also change our own ideas in a timely manner. In fact, "ambition" is the starting point for success.
For us, ideals, ambitions, and ambitions are all ambitions. Ambition plays an important role in our lives. Ambition is the driving force behind the struggle of life and the catalyst for all success.
Ambition is the success of all successful drugs, is the birth point of all miracles, is a guiding light on a person's life journey. It shines through people's long nights, ushers in a dawn, and accompany you through a long life.
Without the ambition of this particle, there will be no success in this fruit. Ambition is a must on the road to success. Ambition is strong, ambition is power, ambition is a dream, ambition is hope, ambition is the power to tolerate and break away from everything, and ambition is the imagination of perseverance and immortality. When a person has ambitions, just like having the wings of a condor, he is wearing the colorful glow of light to the unpredictable sea of ​​success and the ocean of dreams.
In order to promote the development of China's super hard coated abrasives as soon as possible. Finally, there is a suggestion, that is, I hope that China Machine Tool & Tool Industry Association will attach a grinding tool branch to hold a small-scale symposium with super-hard materials, coated abrasives and application experts in research and development and production. I hope that I will be invited to the meeting. Experts are prepared to discuss how to accelerate the formation of China's superhard abrasive belt industry and healthy development.
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