Metal Stamping: A Quick and Cheap Way to Produce Simple Shapes

Metal stamping is the process of transforming metal sheets into different shapes by stretching and cutting them in two or three dimensions. This manufacturing method involves using tools attached to a metal press machine, such as dies and punches, to bend, stretch, and blank a metal sheet into the desired shape or form. Metal stamping is a process by which metal sheets are cut into desired shapes and dimensions through drawing and blanking processes. A die and punch work together to bend, stretch, and blank a metal sheet to the ideal shape.

Compared to CNC machining, sheet metal stamping is relatively easy to set up and is a cheaper way to produce metal parts. Additionally, when speed is a crucial consideration, stamping can be faster than CNC machining. However, it’s important to note that metal stamping isn’t ideal for producing complex shapes or when high precision is necessary.

CNC Machining: The Ideal Choice for Elaborate Parts

CNC machining is a process that uses computers to control tools, such as lathes, mills, and routers, to shape materials, including metal, wood, and plastic. The process involves involves carving a shape from a solid bar or tubing. The workpiece is held in a fixed position while a tool excavates the desired design, making it perfect for more intricate shapes. This manufacturing method is highly accurate and incredibly detailed, making it the preferred method when producing metal parts with complex shapes or tight tolerances.

CNC machines are versatile and come with different high-tech tools to deliver accurate results. The machines run on one or two axes, while advanced ones operate on the x, y, and z-axis. These machines can flip parts to allow for the removal of materials that were underneath, eliminating the need for workers to convert the prototype. Each tool performs a specific task, ranging from incisions to cuts. The range of CNC tools includes roughing end mills, end mills, fly cutters, thread mills, reamers, drill bits, hollow mills, slab mills, gear cutters, side and face cutters, and face mills.

One of the advantages of CNC controlled machining is the adaptability of the process. The initial analysis involves evaluating the fixture and determining the fixture’s design. A machining fixture is created that fits the material, position, clamping theme, and other structural characteristics.

However, CNC machining can come with a higher price tag compared to metal stamping because of the need for programming and setup time. Although CNC machines take a shorter setup time, once a program is designed in a CAD file, the production begins. 

CNC machines are typically chosen for low quantity production because of it’s higher cost. Though it is often chosen for high volumes because it offers significant benefits over other machining strategies, including high accuracy tolerances, exceptional surface finishes, and custom finishes. Repeatability, even at high volumes, and the ability to produce complex shapes and internal components quickly, makes CNC machining a reliable method for producing high-quality parts. Fortunately, there are companies like Optmel who are able to make CNC machine manufacturing more affordable through off-shoring without any compromise on quality or production time.

But How Do You Choose Between Metal Stamping and CNC Machining? 

Here are three critical factors to consider:

Material Tolerance: Understand What Materials You Need

CNC machines work best for materials that offer low tolerance, such as plastic, aluminum, or other soft metals, which can be easily shaved or bent to desired shapes. Meanwhile, metal stamping works better with thicker and harder materials, ideal for mass production.

Quantity: Determine How Many Parts You Need

If you require many pieces or high-volume mass production, metal stamping may be the better option as it’s more efficient at high speeds. However, when low-volume production is needed, CNC machining is a better choice.

Price: Calculate the Cost of Each Method

Price is a crucial factor in any production process, so consider the costs of each method before making the final decision. Although CNC machining is slower, it’s also highly accurate, but expensive. Meanwhile, metal stamping is relatively cheap and fast, but not ideal for complex shapes.

With this information in mind, you’ll be much better equipped to make the right choice between metal stamping and machining. Consider the material tolerance, quantity, and price before deciding which method suits your needs. Finally, remember that choosing the right manufacturing method can save you time, money, and efforts while ensuring the quality of your products.

In conclusion, whether you choose metal stamping or CNC machining, an efficient and reliable production process is critical. The use of innovative technology and high-tech tools helps to deliver accurate results, which is essential in today’s competitive manufacturing environment. By understanding the benefits of each method, you can make an informed decision that meets your production needs.

Still deciding which method is right for you? Contact Optmel today. We do both CNC machining and metal stamping and will be able to advise you on which method is best for your custom manufacturing needs.