Best aesthetic and plastic surgery facility in Dubai, UAE. Al Shunnar Plastic Surgery holds its name high among major cosmetic surgery providers in UAE. We have a team of Johns Hopkins Hospital... moreBest aesthetic and plastic surgery facility in Dubai, UAE. Al Shunnar Plastic Surgery holds its name high among major cosmetic surgery providers in UAE. We have a team of Johns Hopkins Hospital trained, American Double Board Certified Reconstructive and Cosmetic surgeons. https://alshunnarplasticsurgery.ae/
Aluminum Honeycomb Panel Manufacturers introduced that the correction of welding distortion can be divided into cold working and hot working methods.
1. Cold working cold working method is also... moreAluminum Honeycomb Panel Manufacturers introduced that the correction of welding distortion can be divided into cold working and hot working methods.
1. Cold working cold working method is also called mechanical correction method. It uses mechanical force to correct welding deformation. It is generally suitable for small size weldments or weldments with small deformation. Commonly used devices include jacks, presses, and straightening plates. Machine waiting. When correcting, first fix the weldment between the supports, and then apply the force opposite to the welding deformation direction to make the opposite plastic deformation and compensate the original deformation. The cold working method is not suitable for steel materials that tend to be brittle.
2. Hot working The hot working method is also called flame correction method, which uses the temperature of the flame to locally heat the steel. When it cools, it produces new local deformation, thereby offsetting the old deformation and achieving the purpose of correction. The correct selection of heating position, temperature and cooling time can get a good correction effect. The higher the heating temperature, the stronger the correction ability, and the lower the heating temperature. Generally, it should be controlled between 600-800°C and not more than 900°C. Gas welding torches are often used for heating. The hot working method is suitable for low-carbon steel structures and some ordinary low-alloy steel structures. Thermal processing is subdivided into three types: point heating, linear heating, and triangular heating. Point heating is mainly used to correct the uneven deformation of the sheet. In general, the greater the thickness of the steel plate, the greater the deformation, the more heating points, the larger the diameter, and the smaller the spacing. There are three basic forms of linear heating: straight, curved, and circular heating, which should be selected as appropriate for specific applications. Triangular heating is mainly used for bending deformation of steel beams and frame structures.
In summer, some quality problems are easy to occur in aluminum composite panels, or are affected by the use environment. Aluminum composite panel manufacturer can take some measures to avoid such... moreIn summer, some quality problems are easy to occur in aluminum composite panels, or are affected by the use environment. Aluminum composite panel manufacturer can take some measures to avoid such phenomena, so what problems are easy to occur in Aluminum Composite Panel Manufacturers in wet weather in summer?
1. The temperature is too high when packaging aluminum composite panel. Steam is formed in the package, and the aluminum composite panel is corroded by moisture.
2. The aluminum composite panel is drenched with rain, which makes the rain pour into the package. Corrosion of aluminum composite panel.
3. Corrosion of aluminum composite panel will occur in high humidity environment.
How to avoid this kind of phenomenon:
1. The aluminum composite panel is naturally cooled and then packaged.
2. A fan can be used to cool the aluminum composite panel.
3. When the aluminum composite panel is packed, it shall be externally packed with plastic cloth and then packed with cardboard.
4. In the process of goods transportation, tell the driver to cover the tarpaulin.
5. In the environment with high humidity, put more desiccant in the package. And put the aluminum composite panel in a relatively dry environment.
Aluminum Corrugated Panel is also one of our product, welcome to click our website: https://www.alubang.net/less
In recent years, under the influence of digital technology, artificial intelligence and environmental protection policies, China's print industry has gradually formed three mainstream development... moreIn recent years, under the influence of digital technology, artificial intelligence and environmental protection policies, China's print industry has gradually formed three mainstream development trends: digital print, intelligent packaging and green print, and label print has become an important foothold for the convergence of the three development trends.
Inspired by the times of science and technology and demand, print labels supplier choose environmental protection materials and use digital print technology to realize personalized creative packaging, which successfully brings the print and packaging industry into the track of sustainable growth and becomes a rising star in the field of print and packaging in Ran Ran. According to statistics, the global label market demand is growing at an average annual rate of 3.9%, which is higher than the global GDP growth rate.
It can be seen from the regional share distribution map of the global label market that, globally, the Asian label market has the largest share of 43%, while Europe and America account for 25% and 19% respectively. With the influence of population structure and economic environment, Asia has become the leader in the recovery and growth of the global print industry, and has driven the rapid development of the global print industry.
As the second largest economy in the world, China ranks first in Asia in terms of print output value and consumption demand, and the label print market occupies 55% of the Asian market. Therefore, China has become a truly famous print country in the world, and label print has become an irresistible star in the field of print and packaging.
In recent years, with the rapid development of e-commerce, product packaging has been regarded as an eye-catching killer in e-commerce sales, and creative labels have become a crucial eye-catching highlight and marketing focus in product packaging. In some emerging markets, such as food, beverage, daily chemicals, toys, clothing and other label applications, labels not only enhance the credibility of products and brand awareness, but also realize personalized customization combined with the interests and emotional cognition of consumers, so labels have great commercial potential and value.
The plastic labels is also one of our product, welcome to buy and purchase! less
Metal Composite Panel refers to a panel coated with another metal on a layer of metal, which has achieved the effect of saving resources and reducing costs without reducing the use effect (corrosion... moreMetal Composite Panel refers to a panel coated with another metal on a layer of metal, which has achieved the effect of saving resources and reducing costs without reducing the use effect (corrosion resistance, mechanical strength, etc.). The compounding methods usually include explosive compounding, explosive rolling compounding, rolling compounding, etc. Composite materials can be divided into composite panel, composite pipes and composite rods according to their appearance. It is mainly used in anticorrosion, pressure vessel manufacturing, electric construction, petrochemical, medicine, light industry, automobile and other industries.
At present, the quality requirements of metal products in industry and manufacturing are getting higher and higher, although there are still many single structural shortage types of metal products in China.
In the development of domestic metal composite panel, the demand is very large, including metal and carbon steel composite steel panel developed in recent years, and many new varieties have been developed. Multi-purpose composite metal materials, product definition is very important. Metal composite panel are widely used in food, metallurgy, shipbuilding, aerospace, machinery manufacturing and other industries can be widely used in composite materials.
Compared with common steel panel, metal composite panel have a wide application range and high-tech content of composite materials.
The metal composite panel is made of carbon steel as the base metal, and the production cost must be much higher than that of metal, and the price is only one third of that of metal.
The metal composite panel contains less precious metals, but improves the product quality and saves resources.
The material of the metal composite panel relates to steel grade; Users can customize according to their own needs;
Metal composite panel and metal, non-ferrous metal and carbon steel have multiple advantages and good performance. They are suitable for special industries and cannot be replaced.
The bonding strength of this material is high, and the combination of sawtooth atoms of two metals ensures the bonding strength.
Galvanized Steel Composite Panel is also our hot product, you can click to view. less
Aluminum Composite Panel Manufacturers share the following ten characteristics of aluminum composite panel:
1. Low quality: Aluminum composite panel is made of aluminum and plastic core material... moreAluminum Composite Panel Manufacturers share the following ten characteristics of aluminum composite panel:
1. Low quality: Aluminum composite panel is made of aluminum and plastic core material with relatively low density, so its quality is much lower than that of aluminum or other metals with the same rigidity or thickness, and much lower than that of glass and stone.
2. Good rigidity: The aluminum composite panel skillfully utilizes the mechanical principle of I-steel structure, ingeniously endows it with unique mechanical properties, and realizes the compounding under high temperature conditions. Compared with a single-layer aluminum panel, the aluminum panel has larger elastic limit, is not easy to deform, and can maintain good leveling performance for a long time in a natural state without too much external force.
3. Rich colors and strong decoration: The aluminum composite panel can be made into various colors on the drawing surface to carry out pattern design matching all purposes. In addition, it also provides a pattern design with precise texture and high quality, which cannot be obtained by single color, for simulating patterns such as granite, wood grain and metal by photocopying technology.
4. High surface flatness: Aluminum composite panel is produced by continuous thermal composite production process, so compared with metal panels made of single material, their surface flatness is high, especially for large-sized panels.
5. Good durability: The aluminum composite panel adopts the thermal composite technology of metal and core materials, and is firmly bonded. Its surface coating is made of different materials according to different application environments.
6. Good processability: The aluminum composite panel is made of aluminum and plastic. It is easy to cut, punch, cut, bend, etc. It can be processed by special processing equipment for aluminum or wood. Therefore, it can not only be processed in the production plant, but also the suggested composite board can be processed on site.
7. Excellent fireproof performance: In the series of aluminum composite panel, newly developed core materials are used for fireproof aluminum composite panel. This core material is filled with other inorganic fillers, so the improvement of fireproof performance has made a leap, reaching B1 standard and meeting the requirements of building regulations.
8. Good cost characteristics: Aluminum composite panel production adopts precoating continuous coating and metal/core material continuous thermal composite process. Compared with common metal veneer, it has high production efficiency and low raw material cost, and is a material with good cost characteristics.
9. Good environmental coordination: the aluminum and plastic core materials in the abandoned aluminum composite panel can be 100% recycled, with low environmental load. In addition, the wood-aluminum composite panel and the outdoor decorative aluminum composite panel adopt fluorocarbon coating, and the products have high durability, low daily maintenance cost and reduced the cost of the whole life cycle.
10. Wide range of uses: aluminum composite panel has good cost performance and wide range of uses. It can be used not only for decoration of curtain walls, inner and outer walls, lobby, restaurants, shops, conference rooms, etc., but also for reconstruction of old buildings, as the surface layer of counters, furniture, inner and outer walls of vehicles, etc.
The Aluminum Corrugated Panel is also one of our product, welcome to buy and purchase! less
At present, the growth in demand for copper enameled wire https://www.xinyu-enameledwire.com/product/enameled-copper-wire/ market is driven by the combination of four major factors: traditional... moreAt present, the growth in demand for copper enameled wire https://www.xinyu-enameledwire.com/product/enameled-copper-wire/ market is driven by the combination of four major factors: traditional mechanical and electrical industry, emerging industry dominated by household appliances, high-tech industry dominated by electronic information, and economic globalization. This has driven the demand for copper enameled wire market to rise one after another and pushed the copper enameled wire industry to continue to develop at a high speed.
With the transfer of the world manufacturing center and the formation of China as the world manufacturing center, the global copper enameled wire market has also begun to gradually transfer to China. At the same time, thanks to the combined impetus of technological progress industries such as machinery and electronics, household appliances, high-tech industries with electronic information as the main body and economic globalization, China's copper enameled wire industry has maintained a high-speed development. The output of copper enameled wire has surpassed that of countries such as the United States and Japan, becoming the world's largest producer and consumer.
China's copper enameled wire industry has formed scale advantages in the Yangtze River Delta, Pearl River Delta and Bohai Rim region through technology introduction, digestion and absorption and independent research and development. The formation of copper product processing bases has produced a regional agglomeration effect of industrialization. The prosperous "plate economy" provides a good market environment for independent innovation and industrial upgrading of enameled wire industry in Jiangsu and Zhejiang regions.
With the upgrading of technology and the diversification trend of user demand, the special enameled wire market has developed rapidly on the basis of maintaining the steady growth of ordinary enameled wires. In recent years, the promotion of efficient motors has driven the rapid development of corona-resistant enameled wires and other special enameled wires. Technological progress in the electronics industry has promoted the development of polyurethane enameled wires. The rise of refrigerator and air conditioner compressor industry has driven the development of 200-grade refrigerant resistant composite enameled wire. The enameled wire industry is gradually optimizing and upgrading its product structure to meet the market demand for high-quality special products.
Energy conservation and environmental protection are the development direction of the entire manufacturing industry. Energy conservation and environmental protection technologies are continuously applied to the application fields of copper enameled wires such as motors and household appliances. As the key materials of motors and household appliances, copper enameled wires not only need to meet the requirements of general characteristics and processing technology, but also need to meet the requirements of new environmental protection and energy conservation technologies on the chemical stability and insulation characteristics of copper enameled wires to realize efficient and stable operation of the system.
In recent years, the development of nanotechnology has created conditions for the improvement and enhancement of copper enameled wires for frequency conversion motors. The development of homogeneous, transparent and better coatable paints is not only beneficial to the production of wires, but also can make the performance of copper enameled wires better and may produce new characteristics, thus expanding the application range of copper enameled wires.
Facing the advanced technology from abroad, many Chinese enterprises have started up one after another, relying on foreign experience and applying imported paint, they have developed enameled wires for high-frequency motors. Enameled wires for variable frequency motors have made great progress through several years of efforts. However, due to factors such as price and application scope, it is still in the research and development stage. The development of copper enameled wire has yet to be promoted by the expansion of its application field.
As a leading enameled wire and enameled aluminum wire supplier - xinyu-enameledwire.com, xinyu enameled wire are mainly used as tight coils of insulated wire in motors, speakers, hard disk head actuators, electromagnets, etc. For more product details, please click on our official website: https://www.xinyu-enameledwire.com/less
Each commodity has its own unique value, and each product has its own advantages and disadvantages. If you want to buy high-quality products, the more professional knowledge you know, the more... moreEach commodity has its own unique value, and each product has its own advantages and disadvantages. If you want to buy high-quality products, the more professional knowledge you know, the more confident you will be. So if you don't know, can you not buy quality products? Of course not, you only need to learn a few simple tips, you can also choose the best and most suitable among many similar products. The following is one of the accessories of the water purifier and the selection method of the water pipe of the Water Purifier Spare Parts https://www.kokoelectric.com/ .
Although the water pipe of the water purifier is only a very small pipe, it is impossible for the water purifier to filter sewage, let alone water transportation, without its assistance. Buying a high-quality water pipe is of great help to the safe use of the water purifier, so how to judge the water pipe quality of the water purifier?
Water purification pipes are widely applicable. Water purification products in the water purification market can basically be used. The selection can be tailored to different types of products such as water purifier, water purifier, pipeline machine, water softener, direct drinking machine, etc. The selection of water pipes can be measured according to the following aspects:
1. High-quality raw materials
It is very important to do a good job in the foundation of a high-rise building. Raw materials are equivalent to the foundation of a product. The choice of high-quality raw materials is very important.
2. Strong practicability
Vacuum shaping can ensure high precision, good roundness, high sealing performance, no water leakage, exquisite workmanship, emphasis on detection, etc. of direct drinking water pipes, which are related to the beauty of the products and also affect the service effect and service life of water purifier pipes.
3. High safety
The PE water pipe of the water purifier is odorless, nontoxic, stable in chemical properties, acid and alkali resistant, free of residual dirt, free of bacteria, clean and healthy. PE water pipe is a kind of odorless and nontoxic food grade data.
The Addiction Treatment Center 101 helps the individual see the light they want. It is difficult to stop addiction to any illegal substance because your body is already used to it, but in the Center... moreThe Addiction Treatment Center 101 helps the individual see the light they want. It is difficult to stop addiction to any illegal substance because your body is already used to it, but in the Center for the Treatment of Addictions 101, we say that it is possible and we will help you in this recovery process.
1. Aluminum Winding Wire(XINYU-ENAMELEDWIRE) http://www.xinyu-enameledwire.com/ has good electrical and thermal conductivity, ranking fourth after silver, copper and gold. Aluminum winding wire has... more1. Aluminum Winding Wire(XINYU-ENAMELEDWIRE) http://www.xinyu-enameledwire.com/ has good electrical and thermal conductivity, ranking fourth after silver, copper and gold. Aluminum winding wire has been used in many fields.
2. It has good plasticity and can be processed by cold or hot pressure to make various profiles, such as wires, wires, rods, tubes, etc. This characteristic is related to the face-centred cubic lattice structure of aluminum.
3. Good atmospheric corrosion resistance. Because an extremely dense aluminum oxide film is formed on the surface of the aluminum winding wire, it can effectively isolate the contact between aluminum and oxygen and prevent one-step oxidation of the aluminum surface.
4. Aluminum is very light (its density is 2.698g/cm3), which is about one-third of copper. Aluminum is often used as the basic component of various light structural materials. At present, aluminum alloy materials are widely used in our daily life.
5. Strength variability. The strength of aluminum is very low, but the strength can be greatly improved after cold deformation and work hardening.
Aluminum Magnet Wire(XINYU-ENAMELEDWIRE) refers to the magnet wire with aluminum as the core, and the magnet wire is used to manufacture insulated wires of coils or windings in electrical products.... moreAluminum Magnet Wire(XINYU-ENAMELEDWIRE) refers to the magnet wire with aluminum as the core, and the magnet wire is used to manufacture insulated wires of coils or windings in electrical products. Also called winding wire. Magnet wires must meet the requirements of various applications and manufacturing processes. The former includes its shape, specification, ability to work at high temperature for a short time and a long time, as well as withstanding strong vibration in some occasions and centrifugal force at high speed, corona and breakdown resistance under high voltage, chemical corrosion resistance under special atmosphere, etc. The latter includes the requirements of stretching, bending and abrasion during winding and embedding, as well as swelling and erosion during impregnation and drying.
Aluminum magnet wires can be classified according to their basic composition, conductive wire core and electrically insulating layer. Generally, it is divided into aluminum enameled wire, aluminum wrapped wire, aluminum enameled wrapped wire and inorganic insulated wire according to the insulating material and manufacturing method used for the electrically insulating layer.
Enameled wire of aluminum magnet wire: coat the conductor with corresponding paint solution, and then volatilize the solvent, solidify the paint film and cool it. Enameled wires can be divided into polyester enameled wires, polyester-imide enameled wires, polyamide-imide enameled wires, polyimide enameled wires, polyester-imide/polyamide-imide enameled wires, corona-resistant enameled wires, as well as oil paints, acetal paints, polyurethane enameled wires, etc. according to the insulation paint used. Sometimes it is also classified according to the particularity of its application, such as self-adhesive enameled wire, cryogen-resistant enameled wire, etc.
The winding of magnet wire: An Important Variety of Winding Wire. Early use of cotton yarn and silk, known as yarn and silk wrap, was used in electrical machines and appliances. Due to the large insulation thickness and low heat resistance, most of them have been replaced by enameled wires. At present, it is only used as a high-frequency winding wire. In large and medium-sized winding wires, when the heat resistance level is high and the mechanical strength is high, glass wire wrapping wire is also adopted, and appropriate adhesive paint is matched during manufacturing.
Paper winding still occupies a considerable position in winding and is mainly used in oil-immersed transformers. The oil-paper insulation formed at this time has excellent dielectric properties, low price and long service life. In recent years, film winding has developed rapidly, mainly polyester film and polyimide film winding. Recently, there are mica tape coated polyester imine film coated copper flat wire for wind power generation.
Aluminum Winding Wire(XINYU-ENAMELEDWIRE) http://www.xinyu-enameledwire.com/ is a kind of winding wire that is used more and more at present, which is inseparable from its own performance... moreAluminum Winding Wire(XINYU-ENAMELEDWIRE) http://www.xinyu-enameledwire.com/ is a kind of winding wire that is used more and more at present, which is inseparable from its own performance characteristics. Aluminum winding wire not only retains some advantages of copper winding wire but also has more advantages in weight and cost. Therefore, it has won the favour of many users, and with the continuous progress of aluminum winding wires in the future, there will be more applications in the future.
Specifically, the aluminum winding wire has high heat-resistant temperature, good thermal shock and softening breakdown performance, is suitable for high-speed automatic winding, and also has the characteristics of high breakdown voltage, no pinholes, direct weldability, high-frequency resistance, small dielectric loss angle and the like, and has good wear resistance, and in addition, the pulsing life of the aluminum winding wire can reach tens of times of that of common composite winding wires.
Compared with copper winding wires, aluminum winding wires have about 20℃ higher heat resistance than copper winding wires. However, when the copper conductor is changed into aluminum conductor, only the conductor diameter needs to be enlarged by 14.7%, and other performance parameters are unchanged. The original 1-ton copper winding wire needs only 0.4 ton to be changed into aluminum winding wire, which is about 40% of the weight of copper, and the cost is only over 20% of that of copper winding wire.
1. Used to make windings that require lightweight, high relative conductivity, and good heat dissipation, especially for transmitting... moreEnameled Copper Clad Aluminum Wire(XINYU) application range:
1. Used to make windings that require lightweight, high relative conductivity, and good heat dissipation, especially for transmitting high-frequency signals.
2. Enameled wire for high-frequency transformers, ordinary transformers, induction coils, motors, household motors, and micromotors.
3. Enameled wire for micro motor rotor coils, etc.
4. Special magnet wire for audio coils and optical drives.
5. Use a magnet wire for the deflection coil of the display.
6. Use a magnet wire for the degaussing coil.
7. Electromagnetic wires for internal coils of mobile phones, watch drive components, etc.
In many applications, as well as transmission equipment, the sprocket is a very important component. The sprocket transmission is an important transmission method today, which is used in many... moreIn many applications, as well as transmission equipment, the sprocket is a very important component. The sprocket transmission is an important transmission method today, which is used in many industries.
Whether it is mechanical transmission or chain transmission, the transmission industry has a larger market to promote the rapid and stable development of the sprocket. The sprocket has been in China for a period of time, and the sprocket enterprise has made great progress in the production and consumption of products. Nowadays, the demand for sprocket equipment is increasing from time to time, and the magnitude is also relatively large. China's development of sprocket equipment is also very important, and will not be less than the pursuit of industrial technology.
Today's sprocket equipment mostly uses the sprocket parts of the base, as well as tensioning heavy roller chain(GETECHAIN) https://www.getechain.com/product/driving-chain/heavy-roller-chain/ and weight boxes to adjust the tension of the coupling. Its construction is not very complicated, so during operation and maintenance. It is not very troublesome, but it still ensures that the heavy roller chain has a very stable tension during the application process, and can continue to adhere to the necessary tension, not sometimes loose. Moreover, when used together with the tensioning heavy roller chain, the sprocket will operate in the direction of the rule, and will not swing like the wire rope and the pulley mechanism, and it will be stable and stable.
The installation of the sprocket will be further applied with the development of mechanization in future development and will be better applied and highlight its advantages.
In fact, daily necessities mould manufacturers can mainly start from the following three points:
First of all, targeted training, establish a good sense of daily necessities mould maintenance. Training on mould operation and maintenance, and strictly implement various maintenance work of tooling moulds, establish a good sense of mould maintenance, and thus effectively improve the service life of daily necessities mould and ensure product accuracy.
Secondly, to achieve the daily necessities mould preheating temperature control, control time. The casting and forging center strictly follows the requirements of the quality system and controls the daily necessities mould to be preheated at 250 °C, and the preheating time is not less than 24 hours, ensuring the normal use of the tooling and the strict quality of the products. Due to the cold winter, the mould cools down quickly. When the casting and forging center is used for more than 15 minutes in the equipment, the mould must be unloaded and sent to the electric heating furnace for heat preservation. When the equipment stops for less than 15 minutes, the daily necessities mould The method of flame baking type heat preservation is carried out, and the flame baking machines of each part on the site are lengthened at the same time to ensure that the mould heat preservation is evenly in place.
Third, the various processing departments of the casting and forging center have formulated effective use and maintenance plans for daily necessities mould according to their own production practices. Forging a site and a sub-section strictly regulates the humidity and usage of the sawdust used for the mould, ensuring that the mould is normally released, and preventing mucosal problems caused by improper use of sawdust.
In the application of heavy roller chain, wear and tear, etc. are common tasks, and the chain usually wears more. The wear is usually caused by the long-term use of the chain, the improper operation during the operation, and the use of the steel in the chain.
The slight wear of the heavy roller chain does not cause a big chain hazard. Instead of re-changing the chain, the chain can be reversed so that the worn side faces the sprocket. If both sides of the chain are worn out, it can only be replaced.
Heavy roller chain are often cracked in addition to wear. Cracking usually occurs when the chain is not properly used. For example, the chain carries too heavy material, and beyond the chain load, the chain will crack. In other words, in the process of use, the chain continues to work, so that the chain can not rest, the chain will crack.
For these small problems with heavy roller chain, it doesn't matter if it is not serious. If there is any risk of affecting the operation, it is safe to replace it.
When using the conveyor chain, it may be damaged for various reasons. In this case, in order to ensure continued work, the conveyor chain should be changed and can be changed separately, but the... moreWhen using the conveyor chain, it may be damaged for various reasons. In this case, in order to ensure continued work, the conveyor chain should be changed and can be changed separately, but the corresponding parts of the two chains should be changed at the same time, thus ensuring both sides. The same is handled. Let China chain supplier(GETECHAIN) https://www.getechain.com/
analyze the causes of damage to the conveyor chain.
1. Shock damage
When the impact load is too large, the conveyor chain will generate a lot of stress and deformation, which is very easy to break the chain.
2. Wearyness is destroyed
If the long-term circulation depends on the load, it will cause the conveyor chain to be tired and broken. In addition, if the conveyor chain itself has external defects, it will be deepened from time to time after the crack.
3. Friction
In the process of application, the chain ring and the sprocket will friction from time to time to form wear and deformation, which will lead to lower strength, and finally only need to be impacted to break, especially the material and manufacturing quality have not reached the specification request.