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Classification of stamping process
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By 袁春凤 (Tiffany)
According to foreign media reports, sales of light vehicles in the United States last year (2018) were not only higher than those in 2017, but also exceeded analysts' expectations, with a total of 17.3 million vehicles sold. However, analysts and industry observers again said that due to a variety of economic factors, the U.S. light vehicle market will show a downward trend in 2019, but the decline is relatively small.
Many analysts expect U.S. light vehicle sales to range from 16.5 million to 17 million in 2019. J.D. Power expects between 16.9 million and 17 million vehicles, with retail sales of light vehicles between 13.6 million and 13.7 million.
As in 2018, the relative strength of the U.S. economy masked concerns about new car prices and rising interest rates. But in addition to these, there will be other problems in 2019, such as the impact of tariff and tax reform.
As a auto parts supplier, Chongqing Feilong Jiangli will keep up-to-date information on new information and new energy industries.
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By 袁春凤 (Tiffany)
Among the top three Japanese car companies, only Toyota did not intentionally rush towards the end of the year. This will leave more foreshadows for the upstream in 2019.
According to Daily Automobile, Toyota's retail sales in China in December 2018 were 123,300, up 14.7% from 107,500 in December 2017.
Toyota's retail sales in China totaled 1,474,500 units in 2018, compared with 1,290,000 units in 2017, an increase of 14.3% last year, which is the sixth consecutive year that Toyota's sales in China have increased year-on-year.
Compared with Nissan and Honda, the other two giants in Japanese auto companies, Toyota showed a double connotation last month: not only were it less than 176,191 Nissan cars in absolute terms of sales, but it was far from 191,907 Honda cars. In terms of year-on-year growth, Nissan fell 4.4%, Honda surged 33.8%, and Toyota's 14.7% was in the middle.
As a auto parts supplier, Chongqing Feilong Jiangli will keep up-to-date information on new information and new energy industries.
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By Erica Zhu Feilong Jiangli
Chongqing Feilong Jiang Li has an independent rubber and plastic workshop, which mainly produces body rubber products, such as bushings, sealing rings and so on. In order to better realize the process and satisfy the design concept, and to ensure the bushing in normal working state more effectively in the process of vehicle assembly, Chongqing Feilong Jiang Li will choose a suitable reference point as the initial zero angle of rubber bushing, which is regarded as the best working state of bushing. In order to keep the best working condition as long as possible, Feilong Jiangli will choose the most common working condition of the whole vehicle as the initial zero angle of the village set. Generally speaking, it is considered that the normal working condition of a car is no-load or half-load, that is to say, the landing state. The corresponding bushing assembly process at this time is called landing tightening technology, that is, tightening the rubber bushing after the vehicle landing. Feilongjiangli's rubber bushing is processed by ingredient, stamping and injection moulding. Each process has strict quality control procedures. The finished bushing is mainly used on Chang'an CS35 and CS75 models.
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By 袁春凤 (Tiffany)
Hydrogen induced wear: hydrogen is released during the friction due to mechanical and chemical action. Hydrogen diffuses into the deformed layer of metal surface, causing a large number of crack sources in the deformed layer. The generation and development of cracks make the surface material fall off, which is called hydrogen-induced wear. Oxygen may come from material itself or environmental medium, such as lubricating oil and water.
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By 袁春凤 (Tiffany)
The mechanism of cavitation is surface fatigue damage caused by impact force, but the chemical and electrochemical action of liquid and abrasive inclusion in liquid may accelerate cavitation damage. For example, the cylinder liner cavitation is caused by the action of piston lateral thrust because the combustion pressure in cylinder varies with crankshaft angle. The elastic deformation and high-frequency vibration of bubbles produce great impact force (tens or even tens of thousands of high pressure) and high temperature (hundreds of degrees) at the instant of collapse, and the collapse speed can reach 250m/s.
Feilong jiangli will update analysis of more auto parts failure models.
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Similar Topics
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By Mengjuan Zhu
According to the different driving mode, the pump is generally divided into mechanical pumps and electric pumps. Most of the engines now use mechanical pumps, and electric pumps have been used in some newly developed, technologically high engines, such as the BMW 6-series (E63) engine.
（1）Mechanical pumps
The mechanical water pump is driven by the engine crankshaft through the driving tape, and its rotational speed is proportional to the engine speed. The working methods of mechanical pumps have both advantages and disadvantages. When the engine is working under high speed and heavy load conditions, the heat produced by the engine, the high speed of the pump makes the circulating flow of the coolant increase, so that the cooling capacity of the engine can be improved. When the engine is working under low speed and heavy load, such as traction other vehicles or open air conditioner, the engine speed is low and the speed of pump is low. , which lowers the engine's cooling capacity.
（2）Electric pumps
Electric water pump has brushless electric pump and brush electric pump. The electric pump is controlled by the engine control unit through the current, which is not affected by the engine speed, and can be flexibly operated according to the actual cooling of the engine. Because the electric pump consumes very little engine power, the fuel consumption of the engine can be reduced after the electric pump is used.
Thanks for your reading. If you have any questions, please contact me [email protected]
https://s1.ax1x.com/2018/07/21/P8R9aQ.jpg
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By Erica Zhu Feilong Jiangli
Stamping technology is an advanced metal processing method. It is based on the plastic deformation of metal. It uses dies and stamping equipment to exert pressure on the sheet metal under normal temperature conditions, so that the sheet metal produces plastic deformation or separation, so as to obtain parts with certain shape, size and performance. Stamping technology is widely used in automobile industry, and is the key technology in automobile body manufacturing.
Stamping features:
(1) it is easy to operate, easy to realize mechanization and automation, and has high productivity.
(2) The dimension precision of the part is guaranteed by the mould. Generally, it can be used for assembly without cutting, so the quality is stable.
(3) it is possible to obtain parts with complex shapes which cannot be machined or processed by other metal processing methods.
(4) Generally, it does not need to heat the blank, nor does it need to remove a large number of metals like cutting, so it not only saves energy, but also has a high utilization rate of materials.
(5) The raw materials used are rolled sheets or strips, and the surface of the material is generally not damaged during the stamping process, so the surface quality of the stamping parts is better.
The stamping process is carried out on punching presses or presses. Special punching tools are equipped on punching presses or presses.
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By Erica Zhu Feilong Jiangli
The stamping process can be divided into different classes according to different standards.
(1) according to the different deformation properties, it can be divided into separation process and forming process.
Separation process: the material is processed under external force to produce deformation, as used in the deformation part of the equivalent stress reached the shear strength of the material, the material will produce shear cracking and separation, thus forming a certain shape and size of the parts. These stamping processes are generally referred to as separation processes, such as tailoring, punching, blanking, and cutting.
Forming process: under the action of external force, the equivalent stress acting on the deformed part of the material is between the yield limit and the strength limit of the material. The material only produces plastic deformation, so as to obtain a certain shape and size of the parts. These stamping processes are collectively called forming processes, such as bending, drawing, forming and other deformation processes.
(2) according to the basic deformation mode, it can be divided into blanking, bending, drawing and forming.
Punching: Punching, such as punching, blanking, etc., is a process in which materials are cut apart along closed or non-closed contours.
Bending: The stamping process of bending a material into an angle or shape is called bending, such as bending, crimping, twisting, etc.
Drawing: The process of drawing a flat blank into a hollow part, or further changing the shape and size of the hollow part with a drawing die, is called drawing. There are thinner drawing and thinner drawing.
Forming: The stamping process that causes material to deform locally to change the shape of a part or blank is called forming, such as flanging, shrinkage, etc.
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By 袁春凤 (Tiffany)
Forging process foundation
Forging concept
Forging is a kind of forging method that produces partial or total plastic deformation of billet or ingot under the action of pressure equipment and tools to obtain certain geometry, size and quality. Forging methods: free forging, die forging, die forging, rolling, drawing, extrusion and so on. Among them, free forging and die forging are the most commonly used forging methods.
Characteristics and application of forging
Improve the internal structure of metal and improve the mechanical properties of metal. Besides free forging, it has higher labor productivity. Save metal materials. It is difficult to forge workpieces with complex shape and inner cavity. Forging is generally used in the manufacture of high strength, good reliability of automotive parts, such as: engine crankshaft, camshaft, connecting rod, chassis drive shaft, cross shaft, front axle, rear axle, steering system knuckle, steering knuckle arm.
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By Erica Zhu Feilong Jiangli
(1) the concept of casting
Molten metal is poured into the mold cavity, and after solidification and cooling, a certain shape of parts or parts blank is obtained. This method is called casting. The blank or parts obtained by casting are called castings. Castings generally account for about 20% of the vehicle's self weight, ranking only second after steel consumption.
(2) casting method
Sand mold casting: Liquid metal fills the mold cavity completely by gravity, and the raw material for forming the mold is mainly sand.
Special casting: all kinds of casting methods other than sand casting.
(3) characteristics and application of casting
It is easy to shape and adaptable.
The production cost is low and more economical.
The microstructure and properties of casting materials are poor.
Casting is generally used in the manufacture of automobile box, shell, bracket parts, such as: engine cylinder block, cylinder head, intake (exhaust) manifold, crankshaft, camshaft, ram speed box shell, chassis rear axle housing, killing bracket, brake drum, brake disc.
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