Quality Control in Sheet Metal Processing: Best Practices and Techniques

Sheet metal processing demands precision and reliability. When you are choosing sheet metal for any further process, you want to ensure that it is the best quality sheet metal parts. As a manufacturer, the responsibility increases manifold as you must ensure that the sheet metal components you produce meet stringent functionality, durability, and aesthetics standards.

Quality end products can be manufactured only when you adopt the best practices and techniques for sheet metal processing in the industry.

This blog has covered the best practices to help you achieve your goal.

Pre-Production Quality Planning

The quality of metal is the first and most important consideration. You must choose the right material for the application after considering its flexibility, thickness, corrosion resistance, thermal conductivity, etc. Each metal varies, serving distinct purposes and performing optimally in specific environments and conditions.

The sheet metal processing starts before the metal is inserted through the bending machine. It starts with designing the components and ensuring that they meet the quality standards specified by the customer. This step is crucial to identify any potential issues which might be discussed before the machine is started.

Once the design is ready and the material has been chosen, it’s time for testing. Employing hardness testing, tensile strength tests, and chemical analysis verifies material integrity.

Best Techniques for Sheet Metal Processing

Different sheet metal components require multiple sheet metal processing techniques that help achieve the desired shape. A skilled workforce knows when to use a sheet metal bending machine or cutting sheet metal, which would be effective.

Here are some techniques that are widely used in sheet metal processing.

Sheet Curling or Hemming

In case the metal sheets have rough or uneven edges, they require hemming or curling, as it is known. The rugged edges are folded on themselves. They can be open, closed, or teardrop-shaped.

Sheet Metal Bending

In metal bending, the sheet metal is deformed by applying force to the sheet to bend it at the desired angle, making it suitable for further processing. A die and punch bend metal in a V-shape, U-shape, or other. shapes


Ironing is the process that achieves uniformity in thickness throughout the sheet metal. For example, if sheet metal is too thick for the application, ironing shall be employed to attain suitable consistency, making it ideal for further processing.

Metal Punching

Metal punching is the process of punching holes into a sheet metal for fixing screws, bolts, or interlocking different components. However, certain specifications exist, such as the punching spot should be at a safe distance from the edge and uniform throughout all the details. Maintaining consistency is paramount in sheet metal processing.

Laser Cutting

Laser cutting is a popular method of cutting sheet metal due to its precision and accuracy. With the aid of a CNC machine, laser cutting offers fast and precise cuts.

Dimension and Tolerance Control

Two parametric and geometrical tolerances are used during sheet metal processing. Parametric tolerancing refers to assigning parameters and defining limits while identifying the parametric and statistical tolerances. Geometrical tolerances refer to acceptable deviation from the specified geometry.

As sheet metal processing is a science, only a manufacturer who understands the tiniest nuances of the process can achieve unmatchable quality.

Visual Inspection and Defect Detection

Whether mass or small-scale, visual inspection at different stages of sheet metal processing is vital to detect defects and imperfections.

Besides visual inspection, the end products must be randomly checked to assess their suitability for the desired application. It helps detect anomalies at earlier stages to reduce waste production and sales returns.

Documentation and Record Keeping

Keeping detailed documentation of the inspection and testing processes helps identify the stages where the issues were identified and what measures were taken to fix them. It could also aid in the future and help against any unexpected litigations.

Employee Training and Skill Development

With technological advancements, manual sheet metal processing has been reduced to a great extent, but it is still popular. To achieve machine-like consistency and precision, your workforce must be trained, and great emphasis should be put on skill development to control quality.

Sheet Metal Processing at New Mexico Metals LLC

Quality control in sheet metal processing is a multifaceted process that demands meticulous planning, rigorous inspection, and continuous improvement. Following the best practices and techniques discussed above ensures high-quality sheet metal components.

At New Mexico Metals LLC, we implement all these robust techniques to deliver superior products that meet your specified quality standards. We have established ourselves as leading metal processing experts in Albuquerque by offering only quality metal parts and unmatchable services. We have a trained workforce ready to fulfill all your requirements.

Visit us or book an appointment for quality metal products and services.



Frequently Asked Questions

Que: Why quality control is crucial in sheet metal processing?

Ans: Quality control is crucial in sheet metal processing to ensure the products meet the specified standards and customer requirements. It includes detecting defects, correcting them, and manufacturing only quality products.

Que: What role does machine calibration play in sheet metal processing?

Ans: Machine calibration ensures that all machines are working accurately to deliver consistency in manufacturing. It keeps the machines and tools in good condition.

Que: What is the significance of root cause analysis in quality control for sheet metal fabrication?

Ans: Root cause analysis involves investigating the causes of defects or inconsistency in production and taking the required steps to fix the problem.