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11

2022-11

Meidengqi MG55 Heavy Duty Floor Grinder

Heavy ground grinding machine is mainly used for a wide range of ground grinding treatment, with fast speed, high efficiency, long time continuous work characteristics, mainly used for ordinary concrete floor processing, can effectively grind the surface laitance, can also be used to remove the old epoxy coating on the ground, is the best choice for the renovation of the coating ground. Heavy ground grinding machine is mainly used for a wide range of ground grinding treatment, with fast speed, high efficiency, long time continuous work characteristics, mainly used for ordinary concrete floor processing, can effectively grind the surface laitance, can also be used to remove the old epoxy coating on the ground, is the best choice for the renovation of the coating ground. Product Features: 1. Imported switch with overload protection has the function of phase loss and leakage protection. 2. Equipped with vacuum cleaner connection device to provide dust-free working environment. 3, fast speed, can work for a long time, high polishing efficiency. 4, can add 12kg of weight iron, can effectively polish the old epoxy floor. 5, can adjust the ground grinding depth. 6. There are four kinds of diamond grinding discs for selection: extra coarse, coarse, medium and fine. The extra coarse disc is especially suitable for removing the old epoxy ground. 7, you can choose the combination of cheap grinding block. 8. The shock absorption device designed by aviation rubber material is flexible and durable. 9. It has the function of fine grinding and derusting: it can chisel the topcoat, primer and oxide skin on the surface of the steel plate. As there are various derusting heads to choose from, it can be chiseled even if there are rust pits on the surface.

2022-11-11

11

2022-11

Method of polishing and grinding

Method of polishing grinding: Grinding is the grinding tool (hereinafter referred to as the grinding tool) surface embedded abrasive or coated abrasive and add lubricant, under certain pressure, the tool and the grinding tool contact and do relative movement, through the abrasive action, from the workpiece surface cut a layer of very thin chip, so that the workpiece has a precise size, accurate geometry and high surface roughness. Its essence is to use free abrasive particles to carry out micro-cutting including physical and chemical comprehensive effects on the surface of the workpiece through the grinding tool. Features:(1) In mechanical grinding, the machine tool-tool-workpiece system is in an elastic floating state. (2) The workpiece to be ground is not subject to any force and is therefore in a free state. (3) The speed of the grinding movement is usually below 30 m/min, which is about 1% of the grinding speed. (4) When grinding, only a very thin layer of material can be cut off, so the heat generated is less, the processing deformation is small, and the surface deterioration layer is also thin. (5) There is residual compressive stress on the grinding surface, which is beneficial to improve the fatigue strength of the workpiece surface. (6) The operation is simple and generally does not require complicated and expensive equipment. (7) Adaptability is good. (8) grinding can obtain very low surface roughness. 1. Fluid polishing Fluid polishing is to rely on high-speed flow of liquid and abrasive particles to wash the surface of the workpiece to achieve the purpose of polishing. Commonly used methods are: abrasive jet processing, liquid jet processing, fluid power grinding. Fluid power grinding is driven by hydraulic pressure, The liquid medium carrying the abrasive particles is caused to flow back and forth at high speed over the surface of the workpiece. The medium mainly uses special compounds with good flowability at lower pressure. (polymer-like substance) and mixed with abrasive, abrasive can be used silicon carbide powder. 2. Mechanical polishing Mechanical polishing is a method of polishing a smooth surface by cutting and plastic deformation of the surface of the material to remove the convex part after polishing, Generally use oilstone, wool wheel, sandpaper, etc., mainly manual operation, special parts such as the surface of the rotary body, Auxiliary tools such as turntables can be used, and the method of super-lapping can be used for high surface quality requirements. Super lapping is a special abrasive tool, In the polishing liquid containing abrasives, it is tightly pressed on the surface of the workpiece to be processed for high-speed rotating motion. Using this technology, the surface roughness of Ra0.008 μm can be achieved, which is the highest among various polishing methods. Optical lens molds often use this method. 3. Ultrasonic polishing The workpiece is placed in the abrasive suspension and placed together in the ultrasonic field, relying on the oscillation of the ultrasonic, The abrasive is ground and polished on the surface of the workpiece. Ultrasonic machining macro force is small, will not cause deformation of the workpiece, but tooling production and installation is difficult. Ultrasonic machining can be combined with chemical or electrochemical methods. On the basis of solution corrosion and electrolysis, ultrasonic vibration is applied to stir the solution, The dissolution products on the surface of the workpiece are separated, and the corrosion or electrolyte near the surface is uniform; Ultrasonic cavitation in the liquid can also inhibit the corrosion process, conducive to surface brightening. 4. Electrolytic polishing The basic principle of electrolytic polishing is the same as chemical polishing, that is, by selectively dissolving the small protruding parts of the surface of the material, Make the surface smooth. Compared with chemical polishing, the effect of cathode reaction can be eliminated, and the effect is better. The electrochemical polishing process is divided into two steps: (1) Macroscopic leveling dissolution products diffuse into the electrolyte, and the geometric roughness of the material surface decreases, Ra> 1μm. (2) micro light level anode polarization, surface brightness, Ra <1μm. 5. Fluid polishing Fluid polishing is to rely on high-speed flow of liquid and abrasive particles to wash the surface of the workpiece to achieve the purpose of polishing. Commonly used methods are: abrasive jet processing, liquid jet processing, fluid power grinding. Fluid power grinding is driven by hydraulic pressure, The liquid medium carrying the abrasive particles is caused to flow back and forth at high speed over the surface of the workpiece. The medium is mainly made of special compounds (polymer-like substances) with good flowability at lower pressure and mixed with abrasives, The abrasive may use silicon carbide powder. 6. Chemical polishing Chemical polishing is to make the surface of the material in the chemical medium micro convex part of the concave part of the preferential dissolution, A smooth surface is thus obtained. The main advantage of this method is that it does not require complex equipment and can polish workpieces with complex shapes, Many workpieces can be polished at the same time with high efficiency. The core problem of chemical polishing is the preparation of polishing solution. Surface roughness obtained by chemical polishing Generally, it is several 10 μm. 7. Magnetic grinding and polishing Magnetic grinding and polishing is the use of magnetic abrasive under the action of a magnetic field to form an abrasive brush to grind the workpiece. This method has high processing efficiency, Good quality, easy control of processing conditions, good working conditions. With suitable abrasives, the surface roughness can reach Ra0.1 μm. The polishing in plastic mold processing is very different from the surface polishing required in other industries, Strictly speaking, the polishing of the mold should be called mirror processing. It not only has the very high request to the polishing itself but also to the surface flatness, There are also high standards for smoothness and geometric accuracy. Surface polishing is generally only required to obtain a bright surface. The standard of mirror processing is divided into four levels: AO = Ra0.008μm, A1 = Ra0.016μm, A3 = Ra0.032μm, A4 = Ra0.063 μm, due to electrolytic polishing, fluid polishing and other methods are difficult to accurately control the geometric accuracy of the part, The surface quality of chemical polishing, ultrasonic polishing, magnetic grinding polishing and other methods can not meet the requirements, so the mirror processing of precision molds Or mainly mechanical polishing.

2022-11-11

11

2022-11

Maintenance points of pavement machinery and equipment

Daily maintenance, also known as routine maintenance. Its main contents are: clean, lubricate, fasten loose parts, check the integrity of parts and components. There are fewer items and parts of this type of maintenance, most of which are external to the equipment. Level 1 maintenance, the main content is: generally tighten, clean, lubricate, tighten, but also partially adjust. Routine maintenance and primary maintenance are generally undertaken by operators. Secondary maintenance. The main contents include internal cleaning, lubrication, partial disintegration inspection and adjustment. Level 3 maintenance. It is mainly to disassemble, inspect and adjust the main part of the equipment, and replace the parts that reach the specified wear limit when necessary. In addition, the wear of major components is measured, identified and recorded. Secondary maintenance and tertiary maintenance are generally undertaken by full-time maintenance workers with the participation of operators.

2022-11-11

Metengqi Floor Grinding Application Plan

11

2022-11

Metengqi Floor Grinding Application Plan

After grinding and curing treatment, the factory floor has transformed—no longer dusty or sandy, with cracks and a dull, lackluster appearance—but now clean, dust-free, highly resistant to compression and abrasion, brilliantly reflective like a mirror, and incredibly easy to maintain. The dramatic difference between the treated and untreated areas is truly remarkable.

2022-11-11

10

2022-11

European Airbus cast a vote of confidence in China!

Xinhua Media + Event "+1": European Airbus Votes Confidence in China! Xinhua News Agency, Tianjin, November 9th (Reporter Sister Liang) On November 9, the Airbus A321 aircraft was officially put into production on the Asian assembly line of the A320 series aircraft in Tianjin. It is expected to deliver the first A321 aircraft in the first quarter of next year. From "320" to "321", the mass production of one of the world's most popular Airbus models in China is not only a "1" added to the model title, but also a vote of confidence cast by foreign investors represented by European Airbus. The A321 is one of the Airbus A320 series models. This model can not only meet the domestic urban hub trunk shipping market, but also better serve the popular routes of countries along the "Belt and Road. At the Airbus Tianjin final assembly line, its first Airbus A321 aircraft went online to begin final assembly. Since the outbreak, the global civil aviation industry has been widely affected. IATA predicts that the global aviation industry will continue to lose money in 2022. In this context, China's "14th Five-Year" Civil Aviation Development Plan proposes that the passenger traffic volume is expected to reach 0.93 billion by 2025, and the per capita annual number of flights for Chinese residents will increase from 0.47 in 2019 to 0.67. In July this year, a number of Chinese airlines ordered a total of 292 A320NEO series aircraft from Airbus to replace retired aircraft and expand their fleet. Airbus said that from the perspective of a single country, China will still be the largest market for Airbus's new aircraft in the world in the next 20 years. Not only the aviation industry, but also the 2022 China Business Environment Survey report of the American Chamber of Commerce in China shows that 60% of its member enterprises regard China as one of the top three investment destinations in their recent global investment plans, and 2/3 of them plan to increase their investment in China this year. Foreign-funded enterprises "vote with their feet" and "vote with investment" rely on stable expectations of China's stable economic growth and the vitality of the consumer market. A set of data is enough to illustrate the problem: from 2013 to 2021, China's average contribution rate to world economic growth reached 38.6 per cent, exceeding the total contribution rate of the Group of Seven countries; the proportion of China's high-tech manufacturing and equipment manufacturing in the added value of industries above scale increased from 9.4 per cent and 28 per cent in 2012 to 15.1 per cent and 32.4 per cent in 2021, respectively. Foreign confidence in China also comes from China's firm concept of green development. The 27th Conference of the Parties to the United Nations Framework Convention on Climate Change (COP27) is being held in Sharm el-Sheikh, Egypt. China continues to firmly implement its national strategy of actively responding to climate change and has established a carbon-to-peak and carbon-neutral "1 N" The policy system has made a series of new deployments and new arrangements. Under the guidance of the "double carbon" goal, China has put forward a long-term goal for the carbon neutral growth of transport aviation in 2035 and the gradual entry of airport carbon emissions into the peak platform period, and has also made clear the binding reduction targets for airlines' unit fuel consumption and carbon dioxide emissions during the 14th Five-Year Plan period. Through the deep docking with Chinese enterprises, the green science and technology innovation ability of foreign enterprises has been implemented in the production practice. Airbus uses sustainable aviation fuel for the first time in China in September this year and will use it for Airbus Tianjin delivery flights...... Xu Gang, executive vice president of Airbus Global and CEO of Airbus China, said that although it is still in the midst of the epidemic, Airbus's pace of development in China has not stopped. The launch of the Airbus A321 in Tianjin shows the confidence of Airbus and European companies in the Chinese economy and the Chinese market. With the blessing of resource endowments such as a complete industrial chain and supply chain, sound infrastructure, and the gathering of high-tech talents, China, which pursues a mutually beneficial and win-win opening strategy, will surely usher in more "more than one" world confidence.

2022-11-10

10

2022-11

Twenty representatives at the grass-roots level, based on their posts, continue to struggle with heart and emotion to start a business.

Twenty representatives at the grass-roots level, based on their posts, continue to struggle with heart and emotion to start a business. The representatives of the 20th National Congress of the Communist Party of China who have returned to their respective jobs and the party members, cadres and the masses around them will learn and understand the spirit of the 20th National Congress of the Communist Party of China, strengthen their confidence, and stimulate new vitality in entrepreneurship. Wenzhu, the representative of the 20th CPC Congress, is the party committee secretary of Beiji Town, Mohe City, Heilongjiang Province. Recently, there have been several heavy snowfalls in the area, and the landscape construction plan for the ice and snow town this winter is being stepped up. Wen Zhu and the town's cadres and masses while learning the spirit of the twenty, while discussing the town's ice and snow industry development. The 20th National Congress of the Communist Party of China represents Wen Zhu, Secretary of the Party Committee of Beiji Town, Mohe City, Heilongjiang Province: The report of the 20th National Congress of the Communist Party of China pointed out that to comprehensively promote rural revitalization, how to use our ecological resources, combined with green water, green mountains, ice and snow, to create our ecological economy. The Arctic Town, which focuses on ice and snow tourism, receives more than 200 million tourists annually. Thanks to tourism, over the years, the town has basically realized that every household has an income. Through the study of the 20 major spirits, everyone is more confident in the future development. Now, the town is busy improving tourism facilities, updating tourism products, and creating an ice and snow tourism industry chain that "can eat, see, and produce. Shi Ruijuan, a villager in Beiji Village, Beiji Town, Mohe City, Heilongjiang Province: The Party Central Committee attaches great importance to rural revitalization, and we have more confidence in the future development of our village. We should do a good job in family hotels, do a good job in our characteristic ice and snow B & B, attract more tourists and increase our income. Strive for a new journey and build a new era. In Dalian, Liaoning, the representative of the 20th National Congress of the Communist Party of China and the maintenance electrician of the super-large branch of Wafangdian Bearing Group, Nafu, and his colleagues learned the spirit of the 20th National Congress of the Communist Party of China, and discussed the "technology is the first productive force" and other content proposed in the 20th National Congress of the Communist Party of China. Share your own experience. On behalf of Wafangdian Bearing Group's super-large branch maintenance electrician Nafu: The report of the 20th National Congress proposed that the implementation of the innovation-driven development strategy requires more key core technologies to be firmly in its own hands. For our team, it is necessary to achieve independent control in the application of new technologies and the mastery of key core technologies, which is the difficulty for us to overcome at present and in the future. The Wazhou Group, where Nafu is located, has increased independent innovation in recent years, and many processes have reached the international advanced level in terms of high-end bearing service life reliability and carrying capacity. After listening to Nafu's sharing of the twenty spirits, everyone is full of confidence in achieving high-level technological self-reliance and self-reliance, and standing up the backbone of "Made in China. Zhou Jiaqi, maintenance electrician of Wafangdian Bearing Group's extra-large branch: After listening to the teacher's lecture, I have a deeper understanding of the Party's 20 major spirits. As a front-line young worker, I will base myself on my job, dare to innovate, embrace dreams and be down-to-earth, and contribute to the manufacturing of a powerful country with the spirit of craftsmanship.

2022-11-10

10

2022-11

Examples of the use of the American Tengqi cutting machine

The concrete pavement cutting machine is driven by gasoline engine and uses diamond saw blade to cut brittle and hard materials such as concrete pavement, marble slab and terrazzo construction. Especially suitable for no power supply, field occasions, used in highway construction, construction, stone processing, cement and other industries. Cutting expansion joints on concrete or asphalt surfaces; road repair work, such as cutting small pieces of concrete or asphalt that have been damaged, is widely used. The machine has the advantages of simple structure, stable cutting, fast speed, straight cutting, smooth, flexible operation and high efficiency. It is an efficient cutting machine in the construction industry.

2022-11-10

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