High-precision stamping part is the shaping of a material under the action of an external force in order to obtain the desired part. It takes a lot of effort to machine the work piece in this way. Moreover, for this, there is equipment that comes with an effort of 16 to 500 tons.
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The tooling installed in the press is a stamp. In it, there is a direct contact of the working tool with the precision. Similarly, for 1 stroke of the machine, a part of a high degree of accuracy is obtained.
The history of the process
Stamping of precision products started in the 16th century. This was due to the development of weapons production, where it was required to obtain a large number of identical parts. In the 19th century, the rapid development of stamping production began.
In addition, household items are produced. There is a need to manufacture high-quality serial products.
With the advent of the automotive and shipbuilding industries, precision forming has taken a key position in the development of these industries. With the help of high-precision stamping part, dimensional parts began to be produced.
Industrial production is not complete without cold and hot stamping. Using these methods, you can create both small and large parts in a short period of time. Furthermore, hot stamping is common where three-dimensional parts need to be obtained.
Cold stamping is the most popular technology for manufacturing Keyword: high-precision stamping part and polymers. The versatility of the method lies in the fact that it allows the production of structures of any size: from kitchen utensils to elements of large ships.
Cold sheet plastic deformation is appreciated for the following benefits:
High quality and manufacturability have a downside: it requires qualified specialists to set up equipment. In addition, designing a high-precision stamping part is a time consuming operation.
The technology of manufacturing parts by stamping both hot and cold presupposes the presence of tooling. Similarly, for both types, stamps have certain differences. Hence, they are good for metal that has a different degree of thickness.
Any working operation of high-precision stamping part can attribute to the group of separating or shaping actions. Let's consider the main procedures:
Cutting: The operation involves cutting the material along a straight or complex line. Moreover, various types of scissors or guillotines are common as working equipment. Cutting is easy to perform both at the start and at the finish stage of high-precision stamping part.
Basically, the stamping press is a machine with a crank or hydraulic drive. Moreover, there is a wide variety of equipment on the market. The characteristics of stamping lines differ in strength and dimensions of the processed materials. Similarly, high power machines are not required for soft precisions.
Stamping production and equipment for it are regulated by the requirements of interstate standards. In addition, GOST establishes the maximum permissible consumption of materials and approves the rules for the development of projects.
Consider the equipment that is common in High-Precision Stamping Part.
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The principle of operation of the equipment comes on the conversion of the crank mechanism of the torque into the reciprocating movement of the slide.
Such equipment classifies as a simple type of mechanism. Moreover, they can be double or triple acting.
The most powerful equipment capable of developing an effort of up to 2 thousand tons. The principle of operation is based on the movement of two hydraulic cylinders of different diameters. The magnitude of the difference in size determines the degree of impact on the surface. Similarly, the fluid moves in special electrically driven pumps.
They are a molding press for the production of parts of a cylindrical configuration. The complete set of the machine includes an induction furnace for preheating blanks.
The High-Precision Stamping Part is common to produce square, round or rectangular forgings.
This is a product of modern technology. Furthermore, the driving force is the energy of the electromagnetic field, which presses on the wire-wound core. In the process of moving, it acts on the executive part of the machine.
Modern machine tool enterprises offer a wide range of automatic High-Precision Stamping Part lines and complexes for solving various problems. Similarly, the machines are high-tech equipment manufactured under the guidance of qualified process engineers.
Modern complexes come with CNC systems with a central touchscreen display, which reduces the operator's functions to a minimum.
A stamping press is a metalworking machine tool used to shape or cut metal by deforming it with a die. A stamping press uses precision-made male and female dies to shape the final product. It is a modern-day counterpart to the hammer and anvil.
A press has a bolster plate, and a ram.[1] Presses come in various types of frame configurations, C-Frame where the front & left and right sides are open, straight-side, or H-Frame for stronger higher tonnage applications. It is very important to size the press and tonnage based on the type of applications, blanking, forming, progressive, or transfer. Strong consideration should be given to avoiding off-center load conditions to prevent premature wear to the press.
The bolster plate is mounted on top of the press bed and is a large block of metal upon which the bottom portion of a die is clamped; the bolster plate is stationary. Large presses (like the ones used in the automotive industry) may be equipped with die cushions integrated in the bolster plate to apply blank holder or counter draw forces. This is necessary when a single acting press is used for deep drawing. The ram / slide is the moving or reciprocating member that the upper die is mounted to. Ram or Slide guidance is a critical element to assure long die life between die maintenance. Different types of slide guides are available, 4 point V-Gibs or 6 point square gibs on smaller presses and 8 point full length slide guides on larger straight side frame presses. The dies and material are fed into the press between the bolster and slide. Good press designs must account for plastic deformation, otherwise known as deflection when frame design and loads are considered.[2]
The vertical motion of the slide acts like a hammer to an anvil. The most common Mechanical Presses use an eccentric drive to move the press's ram slide, length of stroke or slide travel depends on the crankshaft or eccentric, whereas hydraulic cylinders are used in hydraulic presses. The nature of drive system determines the force progression during the ram's stroke. Mechanical presses have a full tonnage rating point above BDC / Bottom Dead Center, normal full tonnage rating points are .187", .25" & .5". Hence a mechanical press has a tonnage curve and should be operated within the press capacity limits. Link Motion mechanical is yet another option, this provides a slide slow down near BDC / bottom dead center for soft touch tooling. This link feature can improve die life and reduce reverse-snap thru tonnage for blanking operations.[3]
On the contrary, Hydraulic Presses do not have a tonnage curve and can produce full tonnage at any point in the stroke. The trade-off is speed, a mechanical press is much faster when compared to hydraulic. On the other hand, Hydraulic Presses are much more practical for deep forming or drawing or parts or when dwell time at the bottom is desired.
Another classification is single-acting presses versus double- (seldom triple) acting presses. Single-acting presses have one single ram. Double-acting presses have a subdivided ram, to manage, for example, blank holding (to avoid wrinkles) with one ram segment and the forming operation with the second ram segment.[4]
Typically, presses are electronically linked (with a programmable logic controller) to an automatic feeder which feeds metal raw material through the die. The raw material is fed into the automatic feeder after it has been unrolled from a coil and put through a straightener. A tonnage monitor may be provided to observe the amount of force used for each stroke. [5]
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