Introduction to CNC Machining and the Art of Metal Bending(types of springs Burke)

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CNC machining, shorthand for Computer Numerical Control, has revolutionized the manufacturing industry by enabling precise control and automation in various processes. When it comes to the production of metal components, one notable aspect is the bending of metal. In this article, we will explore the world of CNC machining and delve into the art of metal bending.

Understanding CNC Machining:

CNC machining involves utilizing pre-programmed computer software to control the movement of machining tools. This technique ensures a high level of precision and repeatability in fabricating components. The advent of CNC machines has significantly enhanced productivity, minimized errors, and expanded the design possibilities across multiple industries.

Exploring the Basics of Metal Bending:

Metal bending, as a critical stage in the fabrication process, holds immense importance in the creation of various products. Whether forming structural beams or crafting intricate designs, the ability to bend metal accurately contributes to the functionality, aesthetics, and overall quality of the end product.

Types of Metal Bending Techniques:

1. Press Brake Bending:
Press brake bending refers to the process of using a press brake machine to apply force on the metal workpiece. Typically, a punch and die set are used to form desired bends and angles. With CNC-controlled press brakes, precision and consistency are achieved effortlessly – ensuring uniformity throughout the entire batch of manufactured parts.

2. Roll Bending:
Roll bending primarily revolves around cylindrical workpieces such as tubes and pipes. The material passes through a series of rollers that gradually shape it into the desired contour or curve. CNC-controlled roll bending machines enable efficient replication of complex designs repeatedly.

3. Stretch Forming:
Stretch forming combines controlled stretching and localized compression to achieve intricate shapes while retaining material integrity. By securing the edges of a sheet metal workpiece, hydraulic pressure is applied, leading to elongation and subsequent bending. CNC programming allows for consistent and accurate stretching, resulting in precise bends.

4. Incremental Sheet Forming:
Incremental sheet forming utilizes a CNC machine with a robotic arm or gantry system to shape the metal through localized deformation. This process involves incremental movements of the tool along the sheet metal surface, gradually building up the desired shape. The flexibility offered by this technique is particularly beneficial when prototyping complex geometries.

Bending Metal with CNC Machining:

CNC machining has paved the way for advanced automation in metal bending processes. By integrating CAD (Computer-Aided Design) software with CNC controls, manufacturers can develop intricate 3D models that minimize human error and increase efficiency during bending operations. These machines execute commands precisely, ensuring optimal material utilization and reducing wastage.

Benefits of CNC Metal Bending:

1. Precision: CNC machines consistently perform accurate bends, leaving minimal room for errors or inconsistencies.

2. Efficiency: With automated programming and continuous operation, CNC metal bending significantly reduces production time.

3. Versatility: CNC machines can accommodate various metals, including but not limited to steel, aluminum, brass, and copper, enabling versatility in product design.

4. Cost-Effectiveness: Utilizing CNC technology for metal bending results in higher production rates and fewer material wastes, ultimately leading to cost savings.


CNC machining has undoubtedly revolutionized the metal fabrication industry, especially concerning the art of metal bending. With its capacity for precision, efficiency, and versatility, CNC metal bending has allowed manufacturers to create high-quality components used in diverse applications ranging from aerospace to architecture. As technology continues to advance, CNC machining will continue to shape the future of metal bending, driving innovation and expanding possibilities. CNC Milling