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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As of March 1st, the dry desulfurization unit (gas desulphurization system) at the 8-3 central station of the second gathering and transportation section of the Tahe No. 2 Production Plant of Tahe River has been safely and steadily operating for 1,100 days, accumulatively processing nearly 100 million cubic meters of high-sulfur natural gas.
The 8-3 dry desulfurization plant at the central station was officially completed and put into production in April 2005. There are 6 sub-towers, and each of the three sub-towers is a group, forming alternating groups of T1 and T2 groups. The device is designed and manufactured by China itself and is currently the largest dry desulfurization device in China.
With the high concentration of natural gas hydrogen sulfide produced by crude oil, the maximum concentration of hydrogen sulfide in a single well reaches 150,000 ppm. Responsible for processing this high-hydrogen sulfide natural gas 8-3 central station dry desulphurization unit, implemented “dynamic monitoring technology†during the replacement and use of the T1 and T2 desulfurizers to achieve a sulfur capacity of the desulfurizer. The largest, average daily natural gas is over 60,000 cubic meters, and the qualified dry gas hydrogen sulfide concentration after treatment is between 0 and 20 ppm, which achieves the rational development and recycling of oil and gas resources, and at the same time ensures ecological balance and safety in production engineering. Environmental protection.
Handling 100 million cubic meters of high-sulfur natural gas