Punching Machine

How to Design Good Stamping Dies?

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Good Stamping Dies

Mould is known as the “mother of the industry” and plays a leading role in the development of the entire national economy, so it is very important to pay attention to the development of the mold industry today. For an enterprise, the competition between enterprises is the battle of “technology”, especially now that punching machines occupy a considerable proportion of industrial production, so stamping dies technology is also critical in the entire enterprise.

Punching dies directly affect the quality of products and the efficiency of production. It is recommended that all manufacturers pay attention to the new technology of stamping dies. The dies are the weapons for you to gain the trust of customers and make good products. Good Stamping Dies

Good Stamping Dies
Stamping Die 1

For stamping dies, making a good die mainly depends on the following points:

  1. The material of the mold
  2. Mold technology
  3. Computer-aided system
  4. New processing equipment Good Stamping Dies
  5. The idea of mold design and design. This is the most important point. The following are some ideas for stamping die design:

Best Stamping Dies Design

Each product has several design schemes, even if a certain design scheme is suitable for this product, the designer needs rich practical experience. A good design plan involves all aspects, and all factors are considered, such as the characteristics of materials (various materials, the mold design plan will change), the structural complexity of the product, the pressure of the press Process parameters, mold steel screening, mold firmness, etc. Good Stamping Dies

Space Simulation And Imagination

Mold designers have stronger spatial imagination ability (spatial logic ability) than ordinary people, that is to say, when a product is held in their hand, they can come up with various design schemes, the relationship of splicing, and various processes. Writing, etc., he wants to find an optimal design. Good Stamping Dies

First of all, he should design a variety of designs for comparison and screening. Then, he determines a more reasonable design scheme, and then uses the simulation method to simulate the optimal design scheme in his own brain; simulate the possible deficiencies in the molding process (in the computer can also be simulated),

list possible problems, and correct them in the redesign. This can reduce unnecessary material waste, shorten the time of stamping die manufacturing, and improve production efficiency. Vice versa, if the designer does not take many factors into consideration in the design, the products produced by the trial mold will have many defects. Maybe after dozens of rectifications, the mold will eventually be scrapped. This is an unsuccessful design that ends up wasting a lot of time and resources. Good Stamping Dies

Innovative Consciousness

As a designer, he has a constant sense of innovation and boldly proposes various designs of his own. Don’t be bound by the past ideas, some design ideas of the ancestors can be left, and some design ideas that are not suitable can be changed. Technology is constantly developing and evolving, new technologies are constantly evolving through practice, and need to be constantly explored in production practice. The die theory of stamping dies experts is not imaginary but also gets experience from practice, brainstorming, discussions, and research together in design innovation. Good Stamping Dies

Stamping Die 2
Stamping Die 2

In general, the design of the stamping die is the most critical. Here are a few things that will help you:

According to The Structure of Stamping Die:

It can be divided into three categories: single engineering model, compound mode, and continuous mode. The first two types require more manpower and create limited economic benefits. Continuous die can be mass-produced with high efficiency. Similarly, when designing a set of high-speed precision continuous punching die, it is necessary to pay attention to the spacing between the modules, the machining accuracy of parts, the assembly accuracy, the matching accuracy, and the interference problems, so as to achieve the purpose of automatic mass production of the continuous die. Good Stamping Dies

Unitized Design Concept:

The overall structure of the stamping die can be divided into two parts: the common part and the part that varies according to the product. Common parts can be standardized or standardized, and parts that vary by product are difficult to standardize. Good Stamping Dies

Template Composition And Specifications:

According to the type and structure of the stamping die, there are two types of structure: the straight configuration type and the reverse configuration type. The former is the most commonly used configuration, and the latter is mainly used for stretch-forming dies or to match special dies. Good Stamping Dies

Template Design of Punch Dies:

The main templates of continuous molds include punch fixing plate, pressing plate, master template, etc. The structure design is based on the accuracy of stamping products, production quantity, processing equipment and processing methods of the mold, and maintenance methods of the mold. There are three forms: Monolithic, yoke, insert. Good Stamping Dies

Stamping Die 3
Stamping Die 3

Unitized Design of Punch Dies:

Die Alignment Unit

The mold alignment unit is also called the mold blade abutting guide device. In order to maintain the alignment of the upper mold and the lower mold and shorten the preparation time, according to the requirements of product accuracy and production quantity, the mold alignment units mainly include the following five types: Good Stamping Dies

No guide type; External guide type; External guide and internal guide combined type; External guide and internal guide combined type; Internal guide type.

Introduction And Guide Sleeve Unit

There are two types of guide and accessories for stamping dies guide type and guide sleeve unit: outer guide type (die seat type or main guide), inner guide type (or auxiliary guide). In addition to the requirements of precision molds, the use of external guides and internal guides is highly demanded. Good Stamping Dies

Pressing Bolt And Spring Unit

It is best to consider the following points when selecting a compression spring unit:

Ensure the free length of the spring and the necessary amount of compression; Good Stamping Dies

Whether it is necessary to adjust the initial spring compression (pre-compression) or load;

Ease of mold assembly or maintenance; Good Stamping Dies

Relationship with the length of punch or press bolt;

Safety (prevents the spring from flying out when it breaks).

Stamping Die 4
Stamping Die 4

Design of Main Stamping Dies Components:

Standard Parts And Specifications

The selection method of standard specifications of stamping dies is as follows: when the specifications used are not limited, it is best to use the highest level; in principle, the standard number is used; when the standard parts of the die do not have this size, the closest one is used for processing.

The Design of The Punch

The punch can be roughly divided into three parts according to its function: the tip of the cutting edge of the processing material (the cutting edge, whose shape is irregular, square, round, etc.); the contact part with the punch fixing plate (fixed part or The shank, its cross-sectional shape is irregular, square, round, etc.); the connecting part (middle part) of the blade and the shank.

Design of Punch Fixing Plate

The thickness of the punch fixing plate is related to the size of the die and the load. Generally, it is 30~40% of the length of the punch, and the length of the punch guide should be higher than 1.5 times the diameter of the punch.

Stamping Die 5
Stamping Die 5

Design of Punch Side Pressure

During stamping, it is the best ideal state that the punch bears equal load on the left and right sides (that is, the lateral pressure is zero). Otherwise, when the punch is subjected to lateral pressure, the upper die and the lower die will be displaced in the lateral direction, causing the die gap to become larger or smaller (uneven gap), resulting in failure to obtain stamping products with good precision.

Press Plate Design

The function of the platen is to peel off the material attached to the punch and guide the small punch. Depending on the function, the design of the platen will be very different. The thickness and selection criteria of the pressing plate are divided into the following two types according to the product design: movable pressing plate and fixed pressing plate.

Back Pressure Plate Design

When stamping, the main action parts (punch, blanking plate, master die) will bear the surface pressure. When the punching pressure is higher than the surface pressure, a back pressure plate should be used.

“Good stamping dies” typically refer to dies used in metal stamping processes to create precise shapes and forms in metal sheets. Here are some characteristics of good stamping dies:

Accuracy: Good stamping dies produce parts with high precision and accuracy, ensuring that the dimensions and tolerances of the stamped parts meet the required specifications.

Durability: Stamping dies should be made from high-quality materials such as tool steel or carbide to withstand the high pressures and forces involved in the stamping process. They should be heat-treated and hardened to resist wear and deformation over time.

Efficiency: Efficient stamping dies are designed to minimize material waste and production time. They should allow for high-speed stamping operations without compromising quality.

Versatility: A good stamping die should be versatile enough to produce a variety of parts with different shapes and sizes. This requires careful design and engineering to ensure that the die can accommodate various forming operations.

Ease of maintenance: Maintenance is crucial to ensure the long-term performance of stamping dies. Good dies are designed for easy maintenance, with features such as accessible components for cleaning, sharpening, or replacement.

Consistency: Consistency in stamped parts is essential for quality control and assembly. Good stamping dies produce parts with consistent dimensions, surface finish, and material properties batch after batch.

Cost-effectiveness: While initial investment in high-quality stamping dies may be higher, they should offer long-term cost savings through reduced downtime, scrap rates, and overall production costs.

Safety: Safety features should be incorporated into the design of stamping dies to protect operators and prevent accidents during the stamping process.

Adaptability: In modern manufacturing environments, stamping dies need to be adaptable to changes in production requirements, such as design modifications or shifts in production volumes.

Compatibility: Stamping dies should be compatible with the stamping press and other equipment used in the manufacturing process. Compatibility ensures smooth operation and optimal performance.

Overall, good stamping dies play a critical role in metal stamping operations, contributing to the efficiency, quality, and reliability of the manufacturing process.

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2 thoughts on “How to Design Good Stamping Dies?

  1. Tom Nathan says:

    This article is very interesting!

    Do you provide punch dies? I own a few punch presses and I run a metal fabrication shop.

    1. Wendy says:

      Thank you for your reply!

      Yes, we can make punching machine molds. Please send me your mold drawings or product picture with sizes, we can quote for you soon!

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