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Successful Punching

Successful punching depends on the quality and the feature of your punching tools. Maximising productivity and efficiency of a fabrication operation is taking one step at a time. By doing small things right, productivity and profitability is present in fabrications.

Fabricating always revolves in evaluating your operations, analyzing the tools that does the punching and examining the slugs being used can really benefit you.

Tool Design

There are four essential parts of tool design; punch, die, stripper and tool holder system. Successful punching depends on these parts and relies with the features of each component.
Punch

During the process of punching, the punch encounters both tensile and compressive force. As the punch connects with the surface of the material being punch it applies pressure until it overcomes the material’s tensile strength. The material fractures releasing the comprehensive forces on the punch and producing the hole within the material.
Successful punching depends on the features and design of the tool that mitigates the forces in process. Using quality steel made tools with metallurgic properties will endure throughout the extreme process.

Stripper

Performs two important functions; it holds the work material against the die as the punch penetrates and retracts and the second function is to hold the punch tip as it punches the hole in the material.
Dies

It requires and efficient fit between the punch and die. A good punch and die alignment, concentric and angular ensures that the punch can enter the die without making contact. Another thing to consider when it comes to dies is the clearance; difference between dimensions of the punch and die. Die clearance around the punch’s peripherals is important along with sharp corners. As the clearance increases with material thickness, so does the radius. With proper radius the quality of improves the strength and the quality of work when it comes to punching.

Tool Holder System

It guides the punch tip to the center of the die whole holding the material to be punched against the die’s surface. The tool holding system provide alignment, orientation and angular alignment of the punch tip relative to the X, Y and Z axes of the punch press.

Proper Maintenance

Proper tool maintenance also contributes to successful punching. With proper lubrication, sharpening using grinding equipment and regular maintenance of the punch press to ensure the turret alignment will really make things different when it comes to punching.

Tooling manufacturers designs tooling for maximum longevity. Maximising the interval between the regrinds with the use of high-quality tools, near polished punch flanks and back taper helps the machines up-time and improving the part quality.

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