How to Handle Jumping Scrap Crushing for Stamping Die

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In the realm of manufacturing, the efficiency of processes is paramount. One such process that demands meticulous attention is stamping die. A prevalent challenge faced in this domain is the issue of jumping scrap crushing. Addressing this concern is not just about ensuring the quality of the final product but also about optimizing the entire manufacturing process for maximum efficiency and reliability.

Jumping scrap crushing in stamping die, a seemingly intricate issue, can be systematically addressed. The root causes span from gap discrepancies, feeding anomalies, to the overuse of stamping oil. By gaining a profound understanding of these causes and proactively implementing countermeasures—such as honing fabrication precision, making feeding adjustments, and ensuring proper demagnetization—we can pave the way for a seamless stamping die process.

To truly grasp the essence of this challenge and its solutions, it’s imperative to delve deeper. Each cause of jumping scrap crushing has its own nuances, and the countermeasures are tailored to address them specifically. Join us as we navigate through each cause and its respective remedy, ensuring a comprehensive understanding of this pivotal aspect of stamping die.

Understanding the Causes of Crushing

In the intricate process of stamping die, several factors can lead to the issue of jumping scrap crushing. By identifying and understanding these causes, manufacturers can take proactive steps to mitigate them, ensuring a smoother and more efficient process. Let’s explore these causes in detail:

Gap Issues

One of the primary culprits behind scrap crushing is an excessively large gap. When the gap between the stamping tools is not maintained within the specified limits, it can lead to uneven pressure distribution, causing the metal to crush or deform.

Feeding Problems

Feeding the material correctly into the stamping machine is crucial. Unsuitable or misaligned feeding can result in uneven stamping, leading to scrap issues. Proper alignment and calibration of the feeding mechanism are essential to prevent this.

Excessive Stamping Oil

While stamping oil is vital for lubrication and cooling, using it excessively can be counterproductive. Too much oil can cause the scraps to stick together or to the parts, leading to crushing and deformation.

Lack of Demagnetization

Metal tools that aren’t demagnetized can attract metal scraps, leading to accumulation and eventual crushing. Regular demagnetization of tools ensures that they remain free from unwanted metal particles, preventing crushing.

Wear and Tear of Punch

A worn-out punch can lose its precision, leading to uneven stamping. Regular maintenance and timely replacement of the punch are essential to ensure consistent stamping quality.

Short Punch

If the punch is too short, it might not exert the required pressure evenly across the material. This can lead to partial stamping and, in some cases, scrap crushing.

Hard Raw Material

Using overly hard materials can pose challenges in stamping. Such materials require more force for stamping, and if not handled correctly, can lead to crushing.

Emergency Measurements

Despite all precautions, unforeseen factors can sometimes lead to crushing. These can range from equipment malfunctions to sudden power surges. It’s essential to have emergency measures in place to address such unexpected issues promptly.

Implementing Countermeasures

While understanding the causes of jumping scrap crushing is crucial, it’s equally vital to know how to address these issues. Implementing effective countermeasures can significantly enhance the efficiency and quality of the stamping die process. Let’s delve into these solutions:

Precision Control

To combat issues arising from gaps, it’s essential to adjust the fabrication precision. By redesigning the gap and ensuring it’s maintained within specified limits, one can achieve uniform pressure distribution, preventing crushing.

Material Feeding Adjustments

Ensuring the material feeds correctly into the stamping machine is paramount. This can be achieved by cutting material strips accurately and ensuring the tooling is clean and free from obstructions. Proper alignment and calibration can prevent feeding-related scrap issues.

Stamping Oil Management

Managing the amount of stamping oil used is crucial. By adjusting the oil addition speed and, if necessary, changing the oil type to one with a different viscosity, one can prevent excessive oil-related issues.


After grinding, it’s essential to demagnetize parts to prevent the accumulation of metal scraps. Regular demagnetization ensures tools remain efficient and free from unwanted metal particles.

Core Plate Die Grinding

Grinding the core plate die ensures its surface remains smooth and even. This process helps in achieving consistent stamping quality and prevents issues arising from a worn-out die.

Punch Length Adjustment

If the punch is too short, modifying its blade insertion length can help. Ensuring the punch exerts even pressure across the material can prevent partial stamping and scrap crushing.

Material and Design Modifications

Sometimes, it’s necessary to change the raw materials used or revise the design to prevent crushing. For instance, using materials that are easier to stamp or redesigning the punch blade can make a significant difference.

Emergency Countermeasures

Despite all precautions, unexpected issues can arise. In such cases, measures like reducing the sharpness of tools, adjusting the grinding size, or even slowing down the stamping speed can help. It’s essential to have a set of emergency countermeasures ready to address unforeseen challenges promptly.


In the intricate world of manufacturing, the stamping die process stands out as a cornerstone. However, like any intricate process, it comes with its set of challenges, with jumping scrap crushing being a prime concern. Addressing this issue isn’t just about rectifying a problem; it’s about optimizing an entire process for efficiency, quality, and reliability. By understanding the root causes of this challenge and implementing the right countermeasures, manufacturers can ensure a smoother, more efficient stamping die process. In essence, the journey from recognizing the problem to implementing solutions underscores the continuous pursuit of excellence in manufacturing.


What is stamping die?

Stamping die is a specialized tool used in manufacturing to cut or shape material, primarily metal, using a press. It’s designed to create metal parts by pressing a die, or a set of dies, into the material to cut or shape it.

Why is demagnetization important?

Demagnetization is crucial because magnetized tools can attract metal scraps, leading to accumulation and potential crushing or deformation. By ensuring tools are demagnetized, manufacturers can prevent unwanted metal particle accumulation, ensuring a smoother stamping process.

How often should the punch be checked?

The punch should be checked regularly for signs of wear and tear. The frequency of checks depends on the usage and the materials being stamped. However, as a general guideline, a thorough inspection after every 10,000 cycles or whenever there’s a noticeable change in stamping quality is recommended.


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