Drawing (manufacturing)

Drawing is a metal working process which uses tensile forces to stretch metal.As the metal is drawn (pulled), it stretches thinner, into a desired shape and thickness. Drawing is classified in two types: sheet metal drawing and wire,bar and tube drawing.The specific definition for sheet metal drawing is that it involves plastic deformation over a curved axis. For wire, bar, and tube drawing the starting stock is drawn through a die to reduce its diameter and increase its length. Drawing is usually done at room temperature, thus classified a cold working process, however it may be performed at elevated temperatures to hot work large wires, rods or hollow sections in order to reduce forces.Drawing is one type of extrusion.

Drawing differs from rolling in that the pressure of drawing is not transmitted through the turning action of the mill but instead depends on force applied locally near the area of compression.This means the amount of possible drawing force is limited by the tensile strength of the material, a fact that is particularly evident when drawing thin wires.

Processes

Sheet metal

The success of forming is in relation to two things, the flow and stretch of material. As a die forms a shape from a flat sheet of metal, there is a need for the material to move into the shape of the die. The flow of material is controlled through pressure applied to the blank and lubrication applied to the die or the blank. If the form moves too easily, wrinkles will occur in the part. To correct this, more pressure or less lubrication is applied to the blank to limit the flow of material and cause the material to stretch or set thin. If too much pressure is applied, the part will become too thin and break. Drawing metal is the science of finding the correct balance between wrinkles and breaking to achieve a successful part.

Deep drawing

Sheet metal drawing becomes deep drawing when the workpiece is drawing longer than its diameter. It is common that the workpiece is also processed using other forming processes, such as piercing,ironing,necking,rolling,and beading.

Stretching

• Stretching - the surface area of a blank is increased by tension, with no inward movement of the blank edge. Often used to make smooth auto body parts.

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

Drawing (manufacturing)

Drawing is a metal working process which uses tensile forces to stretch metal.As the metal is drawn (pulled), it stretches thinner, into a desired shape and thickness. Drawing is classified in two types: sheet metal drawing and wire,bar and tube drawing.The specific definition for sheet metal drawing is that it involves plastic deformation over a curved axis. For wire, bar, and tube drawing the starting stock is drawn through a die to reduce its diameter and increase its length. Drawing is usually done at room temperature, thus classified a cold working process, however it may be performed at elevated temperatures to hot work large wires, rods or hollow sections in order to reduce forces.Drawing is one type of extrusion.

Drawing differs from rolling in that the pressure of drawing is not transmitted through the turning action of the mill but instead depends on force applied locally near the area of compression.This means the amount of possible drawing force is limited by the tensile strength of the material, a fact that is particularly evident when drawing thin wires.

Processes

Sheet metal

The success of forming is in relation to two things, the flow and stretch of material. As a die forms a shape from a flat sheet of metal, there is a need for the material to move into the shape of the die. The flow of material is controlled through pressure applied to the blank and lubrication applied to the die or the blank. If the form moves too easily, wrinkles will occur in the part. To correct this, more pressure or less lubrication is applied to the blank to limit the flow of material and cause the material to stretch or set thin. If too much pressure is applied, the part will become too thin and break. Drawing metal is the science of finding the correct balance between wrinkles and breaking to achieve a successful part.

Deep drawing

Sheet metal drawing becomes deep drawing when the workpiece is drawing longer than its diameter. It is common that the workpiece is also processed using other forming processes, such as piercing,ironing,necking,rolling,and beading.

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

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.

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

Blanking and piercing

Blanking and piercing are shearing processes in which a punch and die are used to modify webs.The tooling and processes are the same between the two, only the terminology is different: in blanking the punched out piece is used and called a blank; in piercing the punched out piece is scrap.The process for parts manufactured simultaneously with both techniques is often termed "pierce and blank." An alternative name of piercing is punching.

Characterization of part quality and potential defects

Burrs and die rolls are typical defects of trimmed surfaces. The surface finish will be lower in the so-called fracture zone, i.e. where the material is irregularly stripped away from the matching surface, at the end of the shearing operation. Die roll is a plastic deformation of the sheet edge, which causes permanent edge rounding.

Burr height is typically used as an index to measure tool wear, because it is easy to measure during production.

Process variants

There are various types of blanking and piercing: lancing, perforating, notching, nibbling, shaving, cutoff, and dinking.

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

Flanging

the material is bent along a curved line.

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

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
  Mobile:0086-13260091203
  Skype:abramdong
• 
  

Bending

he material is deformed or bent along a straight line.

Bending is a manufacturing process that produces a V-shape, U-shape, or channel shape along a straight axis in ductile materials, most commonly sheet metal.Commonly used equipment include box and pan brakes and brake presses,and other specialized machine press.Typical products that are made like this are boxes such as electrical enclosures and rectangular duct work.

Process

THE press brake forming, a work piece is positioned over the die block and the die block presses the sheet to form a shape.Usually bending has to overcome both tensile stresses and compressive stresses.When bending is done, the residual stresses cause the material to spring back towards its original position, so the sheet must be over-bent to achieve the proper bend angle. The amount of spring back is dependent on the material, and the type of forming. When sheet metal is bent, it stretches in length. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. The bend radius refers to the inside radius. The formed bend radius is dependent upon the dies used, the material properties, and the material thickness.

The U-punch forms a U-shape with a single punch.

Types

There are three basic types of bending on a press brake, each is defined by the relationship of the end tool position to the thickness of the material. These three are Air Bending, Bottoming and Coining. The configuration of the tools for these three types of bending are nearly identical. A die with a long rail form tool with a radiused tip that locates the inside profile of the bend is called a punch. Punches are usually attached to the ram of the machine by clamps and move to produce the bending force. A die with a long rail form tool that has concave or V shaped lengthwise channel that locate the outside profile of the form is called a die. Dies are usually stationary and located under the material on the bed of the machine. Note that some locations do not differentiate between the two different kinds of dies (punches and dies.) The other types of bending listed use specially designed tools or machines to perform the work.

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:Abram Dong

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.

As a professional stamping parts manufacturer and metal parts fabricator,the best services could be supplied.email us for more information:

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

aluminum parts

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.

machining service