For the car, the engine is its "heart", oil can be vividly called "blood", only high-quality, sufficient lubricants can carry us to any place of thought, or travel, or work. So, how to choose automotive lubricants? Follow Xiaobian to see it. Method/step 1, check the appearance The rider should be clear that a good lubricant can enhance the car's power while also making the car more durable. Therefore, when selecting the oil, it can be identified by observing its appearance. The high quality looks relatively clear, transparent, free of debris, and suspended particles. Shake it by hand, it should be better fluidity. However, the poor quality seems to be more turbid. It may also be able to see the impurities inside. Some colors may be darker. At the same time, it may give off a pungent or strong smell. This type of engine oil damages the engine is also relatively large, so be careful. Oh. 2, packaging Lubricating oil packaging will in fact reveal to you the quality of it. The good quality oil cap is a one-time cover, and it will be sealed with tin foil at its notch, and the manufacturer's name will also be printed on the tin foil. The quality is more assured that it can better protect the engine and reduce wear and tear. The poor quality generally does not have such a seal. 3, viscosity distribution engine Secondly, the viscosity of lubricants used in automobiles will vary, and the appropriate oil should be selected according to the conditions of the vehicle. For the new engine, you can choose a smaller viscosity, because just in the run-in period, do not need too much power. So, what kind of use should be made when the car is used for a long time and what is more serious? It is recommended to purchase a high viscosity to maintain the oil pressure used, but also to ensure its normal lubrication.
Sheet Metal Fabrication
Definition of sheet metal fabrication
Sheet Metal fabrication is the creation of useful metallic parts and structures by the application of multiple fabrication processes. Sheet metal fabrication is basically a broad term that involves various complex processes like cutting, forming, bending, welding, machining, and assembling. The instructions include below: materials, processes, and tools required for sheet metal fabrication.
Types of Sheet Metal Fabrication Materials
The choice of metal depends on the final use of the fabricated parts.
Common fabrication processes:
· Carbon Steel
· Stainless Steel
· Aluminum
· Bronze
· Copper
· Brass
· Aluminized steel
· Galvanized steel
Types of Metal Fabrication Processes
The journey to the final product from raw sheet metals proceeds through various sheet metal fabrication processes. All the sheet metal fabrication processes can be grouped into the following three categories:
· Cutting
· Deformation
· Assembly
Sheet metal fabrication: Cutting
ii. Water jet cutting
iii. Plasma cutting
Sheet metal fabrication: Forming or Deformation
Bending: Sheet metal bending is one of the most popular deformation processes. A machine known as a Press brake is used to bend sheet metals into V, U, or other complex shapes. With an increase in gauge thicknesses of sheet metals the force required to bend increases.
Stamping: In the stamping process, a hydraulic or mechanical stamping press equipped with a tool and die is used to perform specific tasks like curling, drawing, embossing, flanging, etc
Hemming: Hemming is a process by which the edges of sheet metal are folded over itself or another piece of sheet metal to create a rounded edge. In the sheet metal fabrication process, two types of hemming processes are widely involved. They are roll hemming and conventional die hemming. Conventional hemming is used for mass production. A hemming roller is used for roll hemming.
Spinning: Spinning is a metal fabrication process where a lathe machine is used to rotate the sheet metal against a tool to produce conical or cylindrical shapes.
Sheet metal fabrication: Assembly
Assembly is basically joining Sheet Metal Components produced using above mentioned cutting or bending processes. The common sheet metal assembly process consists of joining by Welding and joining using fasteners.
Welding: In the welding process, sheet metal components are joined together by melting sections with the application of heat to form a solid connection. There are various processes available that are used to weld sheet metals.
Joining using Fasteners: Similar or dissimilar sheet metal parts can easily be joined using fasteners like bolts, screws, rivets, etc.
Brazing: Brazing is a process similar to welding that operates by melting a filler without melting the sheet metals.
Adhesives: Adhesives can be used to hold metal sheets together in conjunction with other joining methods
Advantages and Disadvantages of Sheet Metal Fabrication
As sheet metal fabrication covers a wide area of techniques and methods, the advantages and limitations will vary depending on the process used during fabrication.
Benefits:
i. Sheet metal fabrication is fast and can produce high-quality components.
i. A large number of processes are available with wide range of materials
ii. High strength to weight ratio for sheet metal fabricated parts.
Disadvantage:
i. Each fabrication process has their own limitations.
ii. High initial cost for set up of equipment and tools.
iii. Requirement of skilled labors for each process.
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How to choose automotive lubricants