Sheet Metal Forming

Sheet metal forming processes are those in which force is applied to a piece of sheet metal to modify its geometry rather than remove any material. The applied force stresses the metal beyond its yield strength.causing the material to plastically deform, but not to fail. By doing so, the sheet can be bent or stretched into a variety of complex shapes. Sheet metal forming processes include the following:

Bending,Roll forming,Spinning,Deep Drawing,Stretch Forming

sheet metal fabrication

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Hemming and seaming

Hemming and seaming are two similar metalworking processes in which a sheet metal edge is rolled over onto itself. Hemming is the process in which the edge is rolled flush to itself, while a seam joins the edges of two materials.

Hems are commonly used to reinforce an edge, hide burrs and rough edges, and improve appearance.

Seams are commonly used in the food industry on canned goods, on amusement park cars, and in the automotive industry.

Process

The process for both hemming and seaming are the same, except that the tonnage requirement is greater for seaming. The process starts by bending the edge to an acute angle. A flattening die is then used to flatten the hem.

Types

There are two types of hemmed edges: closed hems and open hems. Closed hems are completely flush while open hems have an air pocket in the bend. The major difference is that the tonnage required for a closed hem is much greater than that for an open hem.

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Sheet Metal Fabrication

Sheet metal fabrication is a classification of manufacturing processes that shape a piece of sheet metal into the desired part through material removal and/or material deformation. Sheet metal, which acts as the work pieces in these processes, is one of the most common forms of raw material stock. The material thickness that classifies a workpiece as sheet metal is not clearly defined. However, sheet metal is generally considered to be a piece of stock between 0.006 and 0.25 inches thick. A piece of metal much thinner is considered to be "foil" and any thicker is referred to as a "plate". The thickness of a piece of sheet metal is often referred to as its gauge, a number typically ranging from 3 to 38. A higher gauge indicates a thinner piece of sheet metal, with exact dimensions that depend on the material. Sheet metal stock is available in a wide variety of materials, which include the following:

Aluminum Brass Bronze Copper Magnesium Nickel

Stainless steel Steel Tin Titanium Zinc

Sheet metal can be cut, bent, and stretched into a nearly any shape. Material removal processes can create holes and cutouts in any 2D geometric shape. Deformation processes can bend the sheet numerous times to different angles or stretch the sheet to create complex contours. The size of sheet metal parts can range from a small washer or bracket, to midsize enclosures for home appliances, to large airplane wings. These parts are found in a variety of industries, such as aircraft, automotive, construction, consumer products, HVAC, and furniture.

Sheet metal fabrication processes can mostly be placed into two categories - forming and cutting. Forming processes are those in which the applied force causes the material to plastically deform, but not to fail. Such processes are able to bend or stretch the sheet into the desired shape. Cutting processes are those in which the applied force causes the material to fail and separate, allowing the material to be cut or removed. Most cutting processes are performed by applying a great enough shearing force to separate the material, and are therefore sometimes referred to as shearing processes. Other cutting processes remove material by using heat or abrasion, instead of shearing forces.

• Forming
• Bending
• Roll forming
• Spinning
• Deep Drawing
• Stretch forming
• Cutting with shear
• Shearing
• Blanking
• Punching
• Cutting without shear
• Laser beam cutting
• Plasma cutting
• Water jet cutting

As a professional stamping parts manufacturer and metal parts fabricator,we have advanced equipments and machines, serious quality control, fast leading time and competitive price.Email us for more information:
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Reducing/Necking

• Reducing/Necking - used to gradually reduce the diameter of the open end of a vessel or tube.
  
  As a professional stamping parts manufacturer and metal parts fabricator,we have advanced equipments and machines, serious quality control, fast leading time and competitive price.Email us for more information:
  rainbowrt@ymail.com
  Mobile:0086-13260091203
  Skype:abramdong
   

Ironing (metalworking)

Ironing is a sheet metal forming process that uniformly thins the workpiece in a specific area.
This is a very useful process when employed in combination with deep drawing to produce a uniform wall thickness part with greater height-to-diameter ratio. One example of ironing can be found in the manufacture of aluminum beverage cans, which are actually pressed from flat sheets of thicker material.

As a professional stamping parts manufacturer and metal parts fabricator,we have advanced equipments and machines, serious quality control, fast leading time and competitive price.Email us for more information:
rainbowrt@ymail.com
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Sheet Metal Fabrication

Sheet metal fabrication is a classification of manufacturing processes that shape a piece of sheet metal into the desired part through material removal and/or material deformation. Sheet metal, which acts as the workpiece in these processes, is one of the most common forms of raw material stock. The material thickness that classifies a workpiece as sheet metal is not clearly defined. However, sheet metal is generally considered to be a piece of stock between 0.006 and 0.25 inches thick. A piece of metal much thinner is considered to be "foil" and any thicker is referred to as a "plate". The thickness of a piece of sheet metal is often referred to as its gauge, a number typically ranging from 3 to 38. A higher gauge indicates a thinner piece of sheet metal, with exact dimensions that depend on the material. Sheet metal stock is available in a wide variety of materials, which include the following:
 

Aluminum Brass Bronze Copper Magnesium Nickel

Stainless steel Steel Tin Titanium Zinc

 
Sheet metal can be cut, bent, and stretched into a nearly any shape. Material removal processes can create holes and cutouts in any 2D geometric shape. Deformation processes can bend the sheet numerous times to different angles or stretch the sheet to create complex contours. The size of sheet metal parts can range from a small washer or bracket, to midsize enclosures for home appliances, to large airplane wings. These parts are found in a variety of industries, such as aircraft, automotive, construction, consumer products, HVAC, and furniture.

Sheet metal fabrication processes can mostly be placed into two categories - forming and cutting. Forming processes are those in which the applied force causes the material to plastically deform, but not to fail. Such processes are able to bend or stretch the sheet into the desired shape. Cutting processes are those in which the applied force causes the material to fail and separate, allowing the material to be cut or removed. Most cutting processes are performed by applying a great enough shearing force to separate the material, and are therefore sometimes referred to as shearing processes. Other cutting processes remove material by using heat or abrasion, instead of shearing forces.
 

• Forming
• Bending
• Roll forming
• Spinning
• Deep Drawing
• Stretch forming
• Cutting with shear
• Shearing
• Blanking
• Punching
• Cutting without shear
• Laser beam cutting
• Plasma cutting
• Water jet cutting

As a professional stamping parts manufacturer and metal parts fabricator,we have advanced equipments and machines, serious quality control, fast leading time and competitive price.Email us for more information:
rainbowrt@ymail.com
Mobile:0086-13260091203
Skype:abramdong
 

Capabilities

Typical Feasible Shapes: Flat Thin-walled: Cylindrical Thin-walled: Cubic Thin-walled: Complex Part size: Area: Up to 80 ft² Weight: 0.5 oz - 100 lb Materials: Metals Alloy Steel Carbon Steel Stainless Steel Aluminum Copper Lead Magnesium Nickel Tin Titanium Zinc Surface finish - Ra: 32 - 125 μin 16 - 250 μin Tolerance: ± 0.01 in. ± 0.002 in. Max wall thickness: 0.08 - 0.5 in. 0.001 - 1.0 in. Quantity: 1000 - 100000 1 - 1000000 Lead time: Weeks Hours Advantages: Can form complex shapes Many material options High production rate Low labor cost Short lead time possible Disadvantages: Limited to constant part thickness Part may require several operations and machines Large amount of scrap Applications: Brackets, panels, cans, utensils