Sheet metal punching is a common fabrication process used in sheet metal manufacturing. Punching is a cutting process that involves applying sufficient cutting force to a sheet of metal to remove a section of material. In the past, metal punching was performed solely with manually operated machines. However, today’s punching methods are performed using  advanced machines, which are programmed to punch standard or specially designed shapes in metal. Computer Numerically Controlled (CNC) punching can be used to produce a variety of designs and can be hydraulically, pneumatically, or electrically powered to deliver around 600 punches per minute.

SHEET METAL PUNCHING AND AUTOMATION

Today’s innovations in sheet metal punching technology allow manufacturers to execute automated punching techniques. Processes are accomplished with speed and precision to form intricate metal parts for multiple industrial sectors. Small punch presses may still be necessary at times for small specific jobs, custom production, or small runs (to meet product demand requirements). However, industrial sheet metal punching is achieved by using automated punching machines with CNC programming.

CNC punching machines work through automated mechanical processes when commands are programmed into computer software. The program secures the material in place and then shapes or forms custom and often quite complex designs with great accuracy. Machines can be fitted with multiple punch and die sets to be used simultaneously to form a metal part with just one stroke of the press. CNC programmed punching offers versatility, flexibility, efficiency, and complexity for manufacturers to meet the most demanding production requirements. It can produce many sheet metal forming processes and produce intricate yet economical holes of varying shapes with precise and consistent duplication.

COMMON INDUSTRIES THAT UTILISE SHEET METAL PUNCHING

Sheet metal punching is used to create parts and components for various goods used in many industries. Automotive, agriculture, electronics, aerospace, energy, construction, architecture, and many other sectors rely on fabricated metal parts to build their products. 

Sheet metal materials used in punching also differ. These include copper, aluminium, titanium, stainless steel, and brass just to name a few. The type of metal can then consequently impact the quality of the punch. Material exposed to repeated punching, especially those in a tight puncture, can cause varying stress and heat build-up degrees. This may lead to deformation, such as stretching and warping. Ways to reduce the effects of distortion vary but the most effective is to use sharp and precise tooling. 

Dull tooling require more force to be carried out, which creates stress that can result in increased distortion of the material being utilised. Sharp tools will improve punch performance and prolong tool life. Another way to reduce distortion is to treat or coat punches to reduce heat build-up during production runs of a higher volume. 

COMMON SHEET METAL PUNCHING PROBLEMS

A number of common issues can occur when using metal punching techniques, including the following:

  • Uneven surface appearance. Sub-par stamping die is mainly to blame for the uneven surface.
  • Blocked screw holes. Screw holes are blocked due to welding displacement.
  • Deformation. Improper handling or the elasticity of the sheet metal forming material.
  • Surface scratches. During the raw material inventory, manufacturing, and shipping processes, the sheet metal forming pieces can hit surrounding objects.
  • Dislocation. The welding positions are misaligned, which is the cause of dislocation.
  • Cracking. The main cause of cracking is stress concentration or excessive stretch.

WHAT ABOUT SHAPING SHEET METAL?

There is a separate process for indenting sheet metal that is sometimes carried out using the same equipment, this is called sheet metal stamping. While the punching process aims to punch a hole through sheet metal, stamping aims to form the metal to create specific shapes—such as an indent or vent opening.

The ability of a CNC punch to achieve this kind of shaping is a large part of the reason why sheet metal punching may be used in place of laser cutting for some custom metal forms.

If you’re contemplating if sheet metal punching or laser cutting is the right choice for your next project, our team of experts can help you make the right choice based on your specific project requirements.

To discuss your next metal project, please get in touch with us any time.

Melbourne's Best Sheetmetal Manufacturer

Expert Technicians

Our experienced and highly trained metal technicians strive to produce the highest precision, accuracy, and workmanship possible.

Premium Materials

We use the highest grade metal products ranging from 0.5 to 20mm thick aluminium, stainless steel and mild steel for long term durability.

Outstanding Service

We pride ourselves on being a family owned business and obsess about making our clients happy, from design, to fabrication, and afterward.

Get a Free Quote

Get in touch with us today for a free no obligation quote for your sheetmetal manufacturing and fabrication needs. Our friendly staff will work with you to understand exactly what you are looking for and to provide accurate costs and timings for your project.

Recent Jobs

machine cutting metal

What are the different types of metal fabrication?

There are various fabrication processes in the sheet metal industry, which are oftentimes used in combination with one another. The methods can be either one or more of the following: metal stamping, cutting, casting, welding, and extrusion. These fabrication techniques are executed to highlight the metal’s properties and showcase its flexibility in application.

Read More
Man looking at sheet metal work

What is sheet metal punching?

Sheet metal punching is a common fabrication process used sheet metal manufacturing. Punching is a cutting process that involves applying sufficient cutting force to a sheet of metal to remove a section of material.

In the past, metal punching was performed solely with manually operated machines. However, today’s punching methods are performed using advanced machines, which are programmed to punch standard or specially designed shapes in metal.

Read More
Finger with prototype idea on it

The benefits of sheet metal prototyping

A prototype is an early sample, model, or release of a product to test a concept or process. It is generally used to evaluate a new design and to enhance its precision through real world testing and usage.

Sheet metal prototyping is a rough draft or mock-up model of the final product that is built before manufacturing begins and allows designers and manufacturers to test quality and finish.

Read More
Scroll to Top