Coining (metalworking)

Coining is a form of precision stamping n which a workpiece is subjected to a sufficiently high stress to induce plastic flow on the surface of the material. A beneficial feature is that in some metals, the plastic flow reduces surface grain size , and work hardens the surface, while the material deeper in the part retains its toughness and ductility.The term comes from the initial use of the process:manufacturing of coins.

Coining is a cold working process (similar to forging which takes place at elevated temperature) that uses a great deal of force to plastically deform a workpiece, so it conforms to a die.Coining can be done using a gear driven press, a mechanical press, or more commonly, a hydraulically actuated press. Coining typically requires higher tonnage presses than stamping, because the workpiece is plastically deformed and not actually cut, as in some other forms of stamping.The coining process is preferred when there is a high tonnage.

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Embossing (manufacturing)

Sheet metal embossing is a stamping process for producing raised or sunken designs or relief in sheet metal.This process can be made by means of matched male and female roller dies,or by passing sheet or a strip of metal between rolls of the desired pattern. It is often combined with Foil Stamping to create a shiny, 3D effect.

Process

The metal sheet embossing operation is commonly accomplished with a combination of heat and pressure on the sheet metal, depending on what type of embossing is required. Theoretically, with any of these procedures, the metal thickness is changed in its composition.

Metal sheet is drawn through the male and female roller dies, producing a pattern or design on the metal sheet. Depending on the roller dies used, different patterns can be produced on the metal sheet. The pressure and a combination of heat actually "irons" while raising the level of the image higher than the substrate to make it smooth. The term "impressing" refers to an image loweredinto the surface of a material, in distinction to an image raised out of the surface of a material.

In most of the pressure embossing operation machines, the upper roll blocks are stationary, while the bottom roll blocks are movable. The pressure with which the bottom roll is raised is referred to as the tonnage capacity.

Embossing machines are generally sized to give 2" of strip clearance on each side of an engraved embossing roll. Many embossing machines are custom-manufactured, so there are no industry-standard widths. It is not uncommon to find embossing machines in operation producing patterns less than 6" wide all the way up to machines producing patterns 70"+ wide.

Characteristics

The metal embossing manufacturing process has these characteristics:

• The ability to form ductile metals.
• Use in medium to high production runs.
• The ability to maintain the same metal thickness before and after embossing.
• The ability to produce unlimited patterns, depending on the roll dies.
• The ability to reproduce product with no variation.
  

  Commonly used materials

• Aluminium (all alloys)
• Aluminium (T1/T2)
• Brass
• Cold rolled steel
• Copper
• Galvanized steel
• High strength, low alloy, steel
• Hot rolled steel
• Steel (all alloys)
  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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Stamping (metalworking)

Stamping (also known as pressing) is the process of placing flat sheet metal in either blank or coil form into a stamping press where a tool and die surface forms the metal into a net shape. Stamping includes a variety of sheet-metal forming manufacturing processes, such as punching using a machine press or stamping press,blanking, embossing, bending, flanging, and coining.This could be a single stage operation where every stroke of the press produces the desired form on the sheet metal part, or could occur through a series of stages. The process is usually carried out on sheet metal , but can also be used on other materials, such as polystyrene.

Stamping is usually done on cold metal sheet.

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email:rainbowrt@ymail.com         Mobile:0086-13260091203

Stamping (metalworking)

Stamping (also known as pressing) is the process of placing flat sheet metal in either blank or coil form into a stamping press where a tool and die surface forms the metal into a net shape. Stamping includes a variety of sheet-metal forming manufacturing processes, such as punching using a machine press or stamping press,blanking, embossing, bending, flanging, and coining.This could be a single stage operation where every stroke of the press produces the desired form on the sheet metal part, or could occur through a series of stages. The process is usually carried out on sheet metal , but can also be used on other materials, such as polystyrene.

Stamping is usually done on cold metal sheet.