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What is metal stamping?

Views: 1     Author: Site Editor     Publish Time: 2022-11-25      Origin: Site

The metal stamping process was first used during the industrial revolution as a cold-forming method to produce bicycle frames and handlebars. The metal stamping process has become an important part of modern industry, producing parts for various industries. Because of the lower cost of the stamping process, the production of parts in the automotive industry has shifted from the earlier use of forging to the metal stamping process.


Metal stamping is a relatively simple process in which a rolled or sheet metal (called a blank) is placed in a press with a die having the desired part shape. Through force and compression, the die is pressed into the metal. After a predetermined amount of time, the partially finished part is removed. While this may seem easy to understand, several different steps are required, including trimming, finishing, and other procedures designed to produce finished parts.

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Through the years, the modern metal stamping process has incorporated many modern technologies, which can be seen by introducing computer numerical control (CNC) into the stamping process, the CNC metal stamping process, where designs can be created and tested on a computer before being fed into a CNC metal stamping machine.


Metal stamping has several benefits. It is a cold-forming process that does not require heat to form the metal and is, therefore, less costly. Complex and intricate designs that cannot be produced using any other process can be easily manufactured. The precision and accuracy of metal stamping make it the number one method of part manufacturing.


Metal Stamping Basics

Metal stamping takes a flat piece of metal and transforms it into a specific and desired shape. It is a complex process that involves several intricate and complex procedures. From the automotive and aerospace to the medical and electronics industries, metal stamping is integral to producing affordable and well-made parts and assemblies. Metal stamping involves various processes and techniques, such as punching, drop stamping, embossing, bending, and flanging.


Metal stamping is a manufacturing process in which scrap pieces are removed from a workpiece as the punch enters the stamping die. The stamped material is usually sheet material, but rolled metal can also be used. The process leaves a die hole that matches the design dimensions. This process allows holes of different shapes and sizes to be accurately produced.


Sheet metal undercutting is a shearing and cutting process in which metal parts are removed from a larger metal sheet. The removed part is called a "blank" and has the desired shape of the final part. It is primarily a part of the two-dimensional forming process.


Embossing creates a raised or recessed design by pressing the blank in the shape of the desired pattern into the die. As the metal is pushed into the embosser, a tool or stylus creates a raised effect on the other side of the blank. By placing the blank on a piece of rubber or foam, the embossed image has a smooth surface finish.


Embossing is required when the edges of the stamped part need to be flattened. The process creates smoother edges, produces finer detail, and increases the part's strength. Imprinting helps to avoid any form of secondary finishing, such as deburring or grinding. Embossing requires a lot of pressure to create the necessary plastic deformation.


Bending is the method of deforming metal into L, U, or V-shaped contours. Bending machines use punches and die to bend metal. The different bending machines are mechanical, pneumatic, hydraulic, and CNC. The bending process results in deformation with stresses above the yield point but below the tensile strength and occurs around a single axis.


Flanging is forming metal parts to produce flares or flanges using dies, presses, or special flanging machines. The process produces a 90-degree bend in the metal. When the fracture line of the bend is greater than the trim line, it is called a stretch flange, and when the fracture line is less than the trim line, it is called a shrink flange.


Metal stamping machines can cast, punch, deform and bend metal using computer-programmed or computer-numerically controlled (CNC) machines to obtain precise and accurate parts. Modern stamping processes can quickly create precise metal shapes with meticulous precision and measurements. These high-tech tools offer customized solutions for 300 different raw materials. The low cost of stamping has made it a major factor in producing the items we depend on for our lives.


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