What is EDM?

Electrical Discharge Machining (EDM) is a non-contact machining method that uses electrical energy to shape metal without the tool directly touching the workpiece. Unlike cutting, grinding, or polishing, EDM removes material through thermal energy generated by electrical discharges.

Let’s explore the basic principles and advantages of EDM.

What is Electrical Discharge?

An electrical discharge occurs when a high voltage is applied to an insulating material, causing dielectric breakdown and allowing current to flow. Common examples include lightning and static electricity.

Even the flow of electricity from a battery to power a device is a form of discharge—current flows from the positive to the negative terminal, completing the circuit.

How EDM Works

EDM creates a series of electrical sparks between an electrode and a workpiece submerged in dielectric fluid. These sparks generate intense heat that melts the material locally. The molten metal is then rapidly cooled and expelled by vaporization, removing unwanted material and forming the desired shape.

Electrodes made of copper or graphite are typically used, and the process takes place inside specialized insulating oil or fluid (dielectric).

Types of EDM

1. Die-Sinking EDM

Uses a pre-shaped electrode with the inverse of the desired geometry. The electrode is controlled via NC (Numerical Control) machinery to move across the X and Y axes and form complex shapes.

Micro-hole EDM, using thin rod electrodes, allows the machining of deep, narrow holes that are difficult to achieve by traditional drilling.

2. Wire EDM

A thin wire acts as the electrode and cuts through the workpiece like a wire saw. It’s also automated using NC controls and is ideal for precise profile cutting.

Advantages of EDM

1. High-Precision Machining
   Achieves micrometer-level accuracy, suitable for intricate and delicate features.
2. Can Process Hard Materials
   Materials like tungsten carbide and hardened steels can be machined without needing expensive cutting tools.
3. Non-Contact Machining
   No mechanical stress is applied, reducing the risk of residual stress, deformation, or burrs.
4. Continuous Cooling During Machining
   The dielectric fluid keeps the workpiece cool, preventing thermal distortion.

Disadvantages of EDM

1. Slow Machining Speed
   Material is removed gradually, making the process unsuitable for high-volume production.
2. Cannot Machine Non-Conductive Materials
   The workpiece must be electrically conductive; otherwise, no discharge occurs.
3. Electrode Wear
   Electrodes erode during use, especially at the edges, requiring replacement to maintain precision.

Process-Specific Drawbacks

• Die-Sinking EDM: Requires custom electrode fabrication for each shape, increasing time and cost.
• Wire EDM: Since the wire is vertically aligned, it’s limited in applications where through-cuts are not possible.

About EDM Oil

In wire EDM machines, water is mainly used as the working fluid, whereas in shape EDM machines, hydrocarbon-based EDM oils are used. Initially, kerosene (paraffin), spindle oil, and hydraulic oil were used as EDM fluids, but with the development of low-viscosity petroleum-based oils, they became widely used. Later, due to concerns regarding fire hazards, odors, and skin irritation, synthetic hydrocarbon-based oils began to be more widely adopted. However, synthetic oils generally result in slower processing speeds compared to petroleum-based oils, which can reduce productivity. This has led to increased interest in the development of synthetic EDM fluids with better performance.

Reasons for Using EDM Oil in the EDM Process

1. Quick Recovery of Insulation and Stable Processing
   The use of EDM fluids helps quickly restore insulation, ensuring stable processing throughout the operation.
2. Cooling and Removal of Debris
   EDM generates debris during the process, which is rapidly cooled and removed by the fluid, maintaining the insulation state of the discharge gap. This allows for a continuous EDM cycle without loss of processing efficiency.
3. Maintaining Discharge Uniformity
   If conductive debris remains between the workpiece and the wire, the discharge can become irregular, leading to instability in the discharge gap and affecting processing accuracy. EDM fluid helps maintain uniform discharge.
4. Higher Flashpoint for Fire Prevention
   Compared to previously used kerosene or petroleum, EDM fluids with a higher flashpoint (average 100°C) reduce the risk of fire and prevent property loss. Kerosene and petroleum had lower flashpoints, exposing many companies to fire risks.
5. Reduced Consumption and Cost Savings
   The low volatility and reduced natural consumption of high-flashpoint fluids help reduce costs and improve overall cost efficiency.

For all of these reasons, EDM fluids play a critical role in ensuring “stable processing” in EDM operations.

Oxidation and Maintenance of EDM Oil

Although EDM fluids do not oxidize easily, using oxidized fluid can lead to several issues:

• Insulation recovery is impaired, causing increased processing time.
• The discharge gap widens, reducing precision.
• Abnormal discharges occur.

To prevent these issues, regular maintenance, including fluid replacement, is essential.

Our EDM Fluid Products

Our company has long recognized these issues and has developed high-quality EDM fluids using polymerized hydrocarbon-based formulas. Our EDM fluid excels in cooling and cleaning properties, offers low viscosity and high flashpoint, providing excellent insulation and reducing extreme wear, making it ideal for ultra-precision machining. Additionally, we use additives to prevent smoke and odor, maintaining a clean working environment and ensuring stability for the user.

We offer various resources and solutions to assist in your processing needs. Please feel free to contact us with any inquiries.

Dyna Co., Ltd.
Industrial Lubricant Solution
E-Mail : dyna@dynachem.co.kr
Web : dyna.co.kr/en/

In this first blog post of the year, we’ll explore one of the most essential components of electric vehicles — the drive motor, and its crucial relationship with lubricants used during manufacturing.

What is a Drive Motor?

A drive motor converts electric energy into mechanical power, enabling an EV to move. It works by delivering torque from the motor shaft (via a reduction gear) directly to the wheels.

There are two main types of electric motors: DC (Direct Current) and AC (Alternating Current) motors. Modern EVs primarily use synchronous AC motors for their superior efficiency, low noise, and high torque density.

Key Advantages of EV Drive Motors

• High Efficiency & Low Maintenance
  With fewer moving parts than internal combustion engines, EV motors offer better energy efficiency and lower long-term costs.
• Instant Torque & Responsiveness
  EVs can generate powerful torque instantly, providing strong acceleration and smooth handling.
• Regenerative Braking
  Drive motors can recover energy during braking, improving overall driving range.
• Reduced Noise & Vibration
  A smoother and quieter ride offers enhanced comfort and a better driving experience.

Market Outlook for Drive Motors

Driven by global climate goals and the transition toward carbon neutrality, the automotive industry is shifting rapidly from internal combustion to electric propulsion.
With heavy investments in EV technologies and supportive government policies, the global market for automotive drive motors is set for significant growth.

Lubricants: A Key to Precision and Performance

Both the stator and rotor — key components of a drive motor — require high-precision stamping during manufacturing.
At this stage, our metal-forming lubricants play a vital role in ensuring optimal performance and surface quality.

At Dyna, we supply specialized lubricants tailored for motor core production across various industries, including the fast-evolving EV sector.
Through continuous R&D and product refinement, we deliver premium solutions that meet our customers’ demanding standards for efficiency, durability, and quality.

Dyna Co., Ltd.
Industrial Lubricant Solution
E-Mail : dyna@dynachem.co.kr
Web : dyna.co.kr/en/

What is Electrical Discharge Machining (EDM)?

Electrical Discharge Machining, commonly known as EDM, is a manufacturing process that removes material from a workpiece using electrical sparks generated between two electrodes — an anode and a cathode.

These electrical sparks generate extremely high temperatures, which melt or vaporize the material, allowing for precise shaping of the workpiece.

Because the sparks occur in rapid succession and affect only very small areas, EDM is particularly suitable for high-precision machining.

As a result, EDM is widely used in applications requiring fine detail and accuracy, such as micro-drilling (super drill) and wire cutting processes.

Mold manufacturing, where consistent replication of parts is critical, heavily relies on EDM due to its precision capabilities.

Key Features of EDM

1. Can machine even hard and tough materials thanks to the high heat generated during discharge.
2. Compatible with CNC systems, enabling automated and programmable operations.
3. Excellent for precision and complex shapes, making it ideal for intricate molds or components.
4. Minimal deformation of the base material, unlike some other machining methods.

Disadvantages of EDM

Despite its advantages, EDM also has some limitations:

1. Requires a specially prepared electrode for each machining job.
2. Limited choice of electrode materials, which can impact process flexibility.
3. Potential risk of fire, which is a critical safety concern.

Among these drawbacks, fire risk is the most serious and should never be overlooked.

In fact, it’s quite rare to find an EDM-specialized facility that hasn’t experienced a fire incident at least once.

Why Does Fire Risk Occur in EDM?

The fire risk associated with EDM arises from two primary causes:

1. The flammability of EDM fluids, especially when traditional oils like diesel or kerosene are used.
2. Starting the machining process before EDM fluid is properly filled, leaving sparks exposed to open air.

EDM fluids serve several essential purposes:

• Cooling the machining area
• Insulating the electrodes
• Flushing away machining debris (chips)
• Enhancing overall precision and stability of the process

In the past, diesel or kerosene was commonly used due to its low cost and resistance to high heat. However, considering that the spark temperatures during EDM can reach 8,000 to 12,000°C, these traditional fluids can pose significant fire hazards.

Importance of High-Quality EDM Fluids

Due to the extreme heat and potential ignition from electrical sparks, modern EDM fluids must have high flash points and low volatility to prevent fires.

In addition, they must:

• Provide excellent cooling and insulation
• Effectively flush out chips
• Contribute to improved machining precision

Dyna’s EDM Fluid – Product Overview

At Dynasolution, we have over 30 years of experience in manufacturing and supplying high-quality EDM fluids.

Key Features of Our EDM Fluids:

1. Highly refined, colorless, and odorless, ensuring a cleaner working environment.
2. Low-viscosity with outstanding thermal stability, suitable for extended operations.
3. High dielectric strength, enabling ultra-precise machining with minimal electrode gap.
4. No residue formation during heat treatment, resulting in excellent cleanability.
5. Special additive formulation prevents soot and odors, keeping the workspace clean and pleasant.
6. Non-irritating to skin, reducing the risk of dermatitis or other skin damage for operators.
7. Low viscosity and high flash point provide excellent operational safety.
8. Higher flash point than conventional petroleum-based oils, reducing fire risk and cutting consumption by over 70%.

For any inquiries about EDM fluids, feel free to contact Dyna Co., Ltd.
We are committed to delivering the best quality and value to our customers.

Dyna Co., Ltd.
Industrial Lubricant Solution
E-Mail : dyna@dynachem.co.kr
Web : dyna.co.kr/en/

In the world of metalworking, precision is everything. When it comes to producing highly accurate, clean-edged components with tight tolerances, fine blanking stamping emerges as a cutting-edge solution. But precision doesn’t come from machinery alone — it requires the perfect synergy of process, materials, and support systems. What is the One often-overlooked factor that plays a critical role in the success of fine blanking?

What is Fine Blanking Stamping?

Fine blanking is a specialized stamping process used to produce precise and flat metal parts with smooth, burr-free edges — typically in a single stroke. Unlike traditional stamping or shearing, fine blanking utilizes:

• A triple-action press (punch, counter punch, and die)
• High-pressure clamping
• Very small clearances between tool and workpiece

This results in superior dimensional accuracy and an almost entirely sheared surface — making it ideal for parts like:

• Gears
• Automotive components
• Clutch parts
• Precision washers
• Electronic connectors

Why Metal Forming Fluids Matter in Fine Blanking

Fine blanking might seem like a dry mechanical process, but in reality, lubrication is essential to its efficiency, tool life, and finished part quality.

Here’s why metal forming fluids are indispensable:

1. Minimizing Friction and Wear

The immense pressure involved in fine blanking creates high friction between the punch, die, and workpiece. Without proper lubrication:

• Tools wear out faster
• Surface defects may occur
• Edge quality decreases

Metal forming fluids reduce this friction, allowing cleaner cuts and extended tool life.

2. Controlling Heat Generation

High-speed, high-force operations generate significant heat, which can:

• Distort workpieces
• Reduce material flow control
• Cause premature tool failure

Cooling agents within metal forming fluids dissipate heat, maintaining thermal stability during the process.

3. Improving Surface Finish

A high-quality metal forming fluid ensures:

• Minimal burr formation
• Smoother part surfaces
• Reduced need for secondary finishing operations

This is critical in industries like automotive or electronics, where surface quality and tolerances are non-negotiable.

4. Preventing Galling and Adhesion

Under high pressure, metal can stick to tooling — a phenomenon known as galling. Metal forming fluids act as a barrier to prevent adhesion, preserving both tooling and part integrity.

What to Look For in a Fine Blanking Lubricant?

Not all fluids are created equal. For fine blanking, ideal metal forming fluids should offer:

• High-pressure resistance (EP performance)
• Excellent cooling and lubricating ability
• Compatibility with a wide range of metals (steel, aluminum, etc.)
• Minimal residue and easy cleanability
• Environmental and operator safety compliance

Synthetic and semi-synthetic fluids are increasingly popular due to their consistent performance and eco-friendly formulations.

Boost Your Fine Blanking Efficiency with the Right Fluid Partner

Fine blanking is about pushing the limits of precision — and every detail matters. By choosing the right metal forming fluid, manufacturers can:

• Improve part quality
• Extend tool life
• Reduce downtime
• Lower overall production costs

At [Your Company Name], we provide high-performance fine blanking lubricants tailored to your specific materials and production conditions. Whether you’re producing clutch plates or intricate electrical connectors, we help you stay sharp — cut after cut.

Please contact us to learn how the right metal forming fluid can transform your fine blanking operation.

Dyna Co., Ltd.
Industrial Lubricant Solution
E-Mail : dyna@dynachem.co.kr
Web : dyna.co.kr/en/

What is Fine Blanking?

Fine blanking is a high-precision metal stamping process developed in Switzerland in the 1920s. The term itself means “precise blanking,” referring to the process of punching out parts with extremely smooth and accurate edges using plastic deformation under high compressive stress, a phenomenon known as the hydrostatic pressure effect. This effect enhances the ductility of the material, allowing for clean shearing.

Unlike traditional machining methods like turning, which create chips, fine blanking forms parts directly through pressing, making it ideal for mass production of complex components—particularly in the automotive industry. Though its working principle is similar to punching, blanking differs in that the cut-out portion is used as the product, whereas punching typically uses the remaining sheet.

Fine blanking stands out from general blanking when higher surface quality, precision, and dimensional consistency are required.

3 Key Advantages of Fine Blanking

1. Exceptionally Smooth Cut Surfaces
Fine blanking delivers clean, straight sheared edges across nearly 100% of the cut surface. In contrast, conventional blanking typically results in about one-third sheared surface and two-thirds fracture surface. The difference is similar to slicing a watermelon with a knife versus breaking it apart by hand—visibly and functionally significant.

The surface roughness from fine blanking ranges from Ra 0.4 to 1.6 μm, much smoother than conventional blanking or machining. Because of this, parts often require no secondary finishing, improving cost-efficiency.

2. Combined Forming Reduces Manufacturing Costs
Fine blanking isn’t limited to flat parts. It also enables simultaneous operations like bending, coining, and extrusion—features that add detail or functional shapes in one stroke. This capability shortens production steps, leading to significant cost savings.

3. Superior Quality Through Triple-Force Mechanism
While standard blanking relies solely on downward punch force, fine blanking uses three coordinated forces: clamping force (with a V-ring to fix the sheet), punch force, and counterforce from an ejector below. This triple-force setup yields higher accuracy, flatness, and perpendicularity.

The V-ring creates grooves that securely fix the sheet, minimizing movement and improving the sheared edge’s perpendicularity. The balanced top-down pressure also prevents material warping and deformation.

Equipment & Maintenance Considerations

Fine blanking setups require specialized, high-cost equipment including:

• Uncoilers to feed steel coils
• Levelers to flatten the material
• Roller feeders to control sheet advancement

Maintenance costs are approximately 10% higher than those for standard blanking systems due to the need for precise die assembly and disassembly.

Die life typically ranges from 500,000 to 1,000,000 strokes. Longevity depends on factors such as blanking depth accuracy, press rigidity, counterforce balance, material feed consistency, die setup precision, and heat treatment quality.

Material Selection

Fine blanking imposes stricter material requirements than conventional blanking. The shearing speed is slower—typically 5 to 15 mm/sec compared to 50 to 100 mm/sec for general blanking—allowing around 30–35 strokes per minute. Thicker or higher-tensile materials reduce the processing speed even further.

Materials must exhibit adequate ductility or malleability to prevent cracking and ensure clean shearing. Additionally, to achieve high-quality edges, cold-rolled sheets with spheroidized microstructures are preferred, adding about 5–10% to material costs.

Growing Applications and Hybrid Techniques

Fine blanking is increasingly used in combination with forging, sintering, casting, and machining to streamline manufacturing, reduce costs, and improve strength or weight performance.

Advancements in press capacity, die material, and surface treatments now enable fine blanking for larger parts and more challenging materials—broadening its application to industrial machinery and structural components.

Lubricant Selection for Fine Blanking

Since fine blanking includes elements of drawing, high-viscosity lubricants are essential. Without proper lubrication, cold welding and tool wear become severe, compromising surface quality and dimensional accuracy. The wrong lubricant can reduce tool life and degrade product quality.

Always select lubricants based on material type and thickness. For further guidance, consult lubricant specialists Dyna Co., Ltd.

Dyna Co., Ltd.
Industrial Lubricant Solution
E-Mail : dyna@dynachem.co.kr
Web : dyna.co.kr/en/

From phone charging cables and telephone communication lines to data cables connecting PCs to the internet, and various memory card modules in automotive navigation systems — connectors have long been the invisible enablers of our daily digital lives.

Although wireless technology is advancing rapidly, we still face numerous technical challenges before everything can be fully wireless. For now, and the foreseeable future, wired connectors and plug-in components remain essential across virtually every sector — from consumer electronics to automotive and industrial applications.

Evolving Connector Types and Increasing Complexity

Even something as simple as a PC-to-monitor cable has evolved dramatically — from VGA (RGB) to DVI, and now to HDMI and DisplayPort. Similarly, charging cables for Android smartphones have gone through multiple format changes, driven by the push for faster data transfer, smaller form factors, and higher power efficiency.

As devices shrink and demand faster speeds, connector modules have become increasingly intricate in structure, all while adhering to international standards for compatibility. These modules — found at the ends of cables or within electronic assemblies — require precision-manufactured components that ensure secure, stable connections.

Where Punching Oil Comes In

To manufacture these connectors, raw materials like aluminum and copper undergo various forming and stamping processes using press machines. One key material used in these high-speed, high-precision operations is punching oil.

As materials get thinner and more diverse due to technological advances, the requirements for lubricants used in stamping processes become more demanding. Punching oil not only facilitates smooth metal deformation but also helps preserve die life and ensure clean, burr-free edges.

Unlike larger automotive parts such as motor cores or radiators (where punching oil is also used), connectors are smaller and more complex — requiring even more specialized formulations of lubricants that can withstand tight tolerances and high repetition rates.

Rising Demands from the EV Boom and Miniaturization Trend

The shift toward electric vehicles has led to an exponential increase in the number of electronic and communication components in modern cars. This growth is pushing suppliers to improve their manufacturing processes, materials, and lubricants to meet ever-more stringent standards set by global OEMs.

Many manufacturers, including those in connector production, are now handling a wide variety of parts. Depending on material type, shape, and size, a mix of lubricants — such as drawing oils, fine blanking oils, and punching oils — may be required. In the past, many companies relied heavily on imported lubricants. However, domestic Korean alternatives have since caught up in both performance and reliability.

Despite this progress, some manufacturers still cling to costly imports, doubting the quality of local products. We believe this mindset needs to shift — and fast.

Our Commitment

Our company proudly supplies punching oil to leading Korean conglomerates under approved vendor agreements. We also export our products to major global corporations, where performance and consistency are critical.

We don’t just sell — we collaborate. When approached with a new item or requirement, we thoroughly analyze the customer’s manufacturing process, materials, and equipment to develop the optimal solution. At the same time, we strive to offer cost-effective products without compromising on performance.

As the industry continues to evolve, so too does our dedication to innovation — in formulation, application, and customer support.

From the charging cables we use with our smartphones to the communication cables connecting telephones, PCs, and monitors — and even the memory cards and navigation systems in our vehicles — connectors and connection components have been a vital part of our everyday lives for decades.

Despite the surge in wireless technologies in recent years, truly wireless environments remain a distant goal. Numerous technical challenges still stand in the way, and in the meantime, physical connection components like cables and plug-in modules continue to play a critical role across virtually every industry.

Miniaturization and Complexity: The Evolving Cable Interface

Cable connectors — especially those at the ends of communication lines — are now more complex and compact than ever before. To ensure compatibility across various devices, these modules are standardized globally. As data transmission speeds increase, so too does the complexity of connector structures.

For example, the cable used to connect a PC to a monitor has evolved significantly over time, moving from RGB to DVI, and eventually to HDMI, as shown in the image below. Similarly, charging ports for Android smartphones have gone through multiple iterations in a short span.

Precision Components Require Precision Engineering

Each device requires a compatible connector module to establish a secure and functional connection. To manufacture these connector components, precision stamping processes are used — and stamping oil plays an essential role in ensuring the quality and reliability of these operations.

Connectors are typically made from materials like aluminum or copper, which undergo various machining and stamping processes to be formed into intricate shapes. As manufacturing technology continues to advance, the materials used are becoming more diverse, and the thickness of components is decreasing. This evolution increases the technical demands placed on suppliers, making development more challenging than ever.

EV Growth Drives Demand and Innovation

The rapid growth of electric vehicle (EV) production has led to a dramatic increase in the number of in-car electronic systems and communication devices. Naturally, this has also triggered a surge in the demand for associated components — and a parallel need for technical innovation.

In a previous blog post, we introduced how stamping oil is used in the production of motor cores and radiators. Compared to these larger components, connectors are far smaller and more intricate, requiring highly precise stamping molds. Stamping oil must also evolve alongside these tools to meet the increasing demands of miniaturization and complexity.

Supporting Diverse Manufacturing Needs

Many companies that manufacture connectors also produce a variety of other precision components. Depending on the shape, size, and material of each product, a wide range of specialized oils may be required — such as drawing oils and fine blanking oils. While imported lubricants were common in the past, most companies today have transitioned to reliable Korean-made alternatives.

That said, there are still companies that hesitate to trust domestic products, choosing instead to continue using expensive imported oils out of habit or caution. We believe it is time for this mindset to change.

Our Commitment to Innovation and Global Quality

Our company is proud to be an approved supplier to major Korean conglomerates and also exports its products to globally renowned manufacturers. We actively collaborate with clients to understand their processes and equipment, developing optimized products that not only meet technical demands but also help reduce production costs.

Through continuous innovation and close customer collaboration, we aim to provide stamping oils that meet the highest global standards while contributin

Dyna Co., Ltd.
Industrial Lubricant Solution
E-Mail : dyna@dynachem.co.kr
Web : dyna.co.kr/en/

Thanks to its unique properties, aluminum plays a critical role in various industries. Due to its lightweight and corrosion-resistant characteristics, aluminum is an essential material in industries such as automotive, electronics, and construction materials. However, in the process of aluminum fabrication, the punching process is key to improving the quality of the final product. And one component that is crucial in this process is Punching Oil.

Today, let’s explore why aluminum punching oil is so important and what factors need to be considered when selecting it.

Why is Punching Oil Important?

In the aluminum punching process, punching oil plays a vital role beyond just lubrication. This is because aluminum is more heat-sensitive and prone to deformation compared to other metals. In this context, punching oil performs several critical functions:

• Lubrication: It reduces friction between the punch and die, increasing the machine’s lifespan and preventing unnecessary wear and tear.
• Heat Dissipation: It helps to quickly disperse the heat generated during high-speed punching, preventing deformation.
• Residue Removal: It effectively removes burrs, chips, and other residues after processing, resulting in a clean surface.
• Surface Protection: It protects the aluminum surface and prevents scratches and stains.

As such, punching oil is an indispensable factor in ensuring the high-quality processing of aluminum products.

What Makes Aluminum-Specific Punching Oil Different from Regular Oil?

Aluminum, due to its nature, has higher friction during processing and is more sensitive to heat than other metals. Therefore, aluminum-specific punching oils differ from regular oils used for other metals in several key ways:

• Viscosity: Aluminum-specific punching oils generally have low to medium viscosity, which allows the oil to penetrate quickly, dissipate heat efficiently, and minimize wear on machine components.
• Chlorine Additives: Many aluminum-specific oils are chlorine-free because chlorine-based compounds can corrode the aluminum surface.
• Cleanability: After aluminum processing, cleaning is essential. Aluminum-specific oils are often designed with fast-drying properties, making them more efficient in post-processing steps.
• Low Odor & Low Smoke: The latest aluminum punching oils have low odor and low smoke performance, improving the working environment.

How to Choose the Right Punching Oil: Don’t Make These Mistakes!

When selecting punching oil, it’s essential to consider processing conditions and aluminum alloy type. To determine which oil is most suitable, check the following criteria:

1. Processing Conditions:

• If you perform high-speed punching often, it’s crucial to choose an oil with excellent cooling properties.
• For continuous processing, select an oil that is easy to clean and focuses on equipment protection.

2. Aluminum Alloy Type:

• The oil’s reaction can vary depending on the type of aluminum alloy. Therefore, it’s vital to select oil that matches the alloy being processed.

3. Environmental Regulations:

• Nowadays, environmentally friendly products are preferred. Oils that produce lower VOC (volatile organic compounds) emissions and are biodegradable are gaining popularity.

4. Cleanability:

• After aluminum processing, residue removal is essential. Choose oils that are either easy to clean or have fast-drying properties to ensure they don’t interfere with subsequent processing steps.

Enhance Quality with Aluminum Punching Oil!

Aluminum punching oil is not just a lubricant. It is a critical component for producing high-quality aluminum products. Selecting the right punching oil can improve processing precision, machine efficiency, and workplace safety—all of which are keys to successful production.

To ensure your aluminum products are processed to the highest quality, choosing the right punching oil is absolutely crucial. By now, you should realize that punching oil is no longer just a supplementary material but an essential element for successful product manufacturing.

Dyna Co., Ltd.
Industrial Lubricant Solution
E-Mail : dyna@dynachem.co.kr
Web : dyna.co.kr/en/

Punching oil is an industrial lubricant used for punching holes or forming shapes in metal. It is generally classified as a metal forming lubricant and is also known as punching oil.

Applications

Punching oil is widely used in the manufacturing processes of motor cores, heat exchangers for air conditioners and refrigerators, radiators for automobiles and heaters, and disposable aluminum lunch boxes. While it is increasingly used for processing aluminum alloys due to the recent increase in their application, punching oil suitable for the material can be applied to almost all metal types.

Key Features

Similar to press oils and other metal forming lubricants in terms of shaping, punching oil has distinct characteristics different from other processing oils:

1. Fast-Drying with No Residue

As mentioned earlier, punching oil is often referred to as “fast-drying oil” as well as “punching oil.” Its most significant feature is its rapid drying property. Most other metal forming lubricants require subsequent processes like cleaning or rust prevention after machining, but punching oil naturally dries within minutes without a separate drying system in some manufacturing plants aiming for faster production. This eliminates the need for additional cleaning processes and leaves no residue, which does not interfere with subsequent processes such as welding.

2. Low Viscosity for High-Speed Operation

Viscosity is a crucial factor in lubricant application, and punching oil is no exception. While high-viscosity lubricants are suitable for slow or high-temperature operations, punching oil is often used in high-speed operations exceeding hundreds of strokes per minute. High viscosity can strain equipment due to resistance and cause defects by adhering the product to the mold during operation. Furthermore, it can affect the drying speed, making low viscosity essential.

3. Excellent Extreme Pressure (EP) and Lubricity Properties

While extreme pressure and lubricity are important for all metalworking fluids, they are even more critical for punching oil due to the demanding nature of the applications it serves. Punching oil is specifically designed for high-speed punching of high-strength materials, and new, even stronger materials are continuously being developed. The high impact during high-speed punching can shorten the lifespan of molds, making punching oil with excellent EP and lubricity properties essential for preventing mold damage and extending their service life. It also minimizes defects in the punched and formed areas of the product and enables the production of high-surface-finish products, contributing to better overall product quality.

Other Features

In addition to the three main features mentioned above, other basic characteristics of punching oil include being colorless for ensuring visibility during operation, odorless to consider the comfort of workers, and non-toxic to prevent harm upon direct contact.

Future Outlook

With the advent of the AI era, the pace of technological development is accelerating at an unprecedented rate, and the development of metal materials is no different. The fields where punching oil is used often involve aluminum alloy materials for electric vehicles, which are at the forefront of recent technological advancements, making this trend even more pronounced. Leveraging the lightweight properties of aluminum, new, stronger, and lighter aluminum alloy materials are being developed rapidly, inevitably increasing the performance expectations for punching oil.

However, developing punching oil that meets these rising expectations is challenging. Achieving superior extreme pressure properties for high-speed processing of strong materials is crucial, while also addressing the difficulty of being harmless to humans and complying with increasingly stringent environmental regulations.

At DYNA, we continuously strive to develop high-performance punching oil technologies and have been recognized for our technical expertise, supplying our products to various domestic and international companies. If you are seeking better performance and quality than your current punching oil or require technical consultation, please do not hesitate to contact us.

Dyna Co., Ltd.
Industrial Lubricant Solution
E-Mail : dyna@dynachem.co.kr
Web : dyna.co.kr/en/

Industrial lubricant market is already saturated with numerous manufacturers. However, punching oil, unlike general-purpose industrial lubricants, is mainly used by large-scale manufacturers and requires strict testing and qualification before being adopted into mass production processes. In particular, major corporations often demand formal approval processes and documentation, making entry into this market quite difficult.

Due to these challenges, it is difficult for small and medium-sized lubricant producers to supply punching oil to mid-sized or larger companies. Product development can be costly and time-consuming, and the risks involved often lead companies to abandon projects midway.

Our company has developed a punching oil specifically designed for use in the aluminum fin press process, a key component in air conditioner manufacturing. This product has been successfully adopted by a major corporation’s production line.

This article is about quality requirements of punching oil for aluminum fin press.

Quality Requirements

1. Lubricity

The aluminum fin press oil must use high-performance synthetic ester as the base oil and include dispersing agents to ensure a uniform lubrication film, providing stable and consistent lubrication performance.

2. Friction & Wear Resistance

The product must meet optimal conditions for friction and wear resistance by carefully selecting and balancing additives based on their properties to ensure excellent workability.

3. Hydrophilicity

Low-volatility base oils and additives should be used to minimize oil residue after processing, facilitating easier post-processing cleaning.

4. Human Safety

Base oils must be certified by the FDA for indirect food contact, and all additives must be non-toxic and safe for human use, including those used in cosmetics and food-related applications. The formula must exclude toxic, carcinogenic, or otherwise harmful substances to prevent skin or respiratory health issues commonly associated with general-purpose oils.

5. Environmental Safety

The oil must be free of sulfur and chlorine compounds (below 1 ppm) and must not emit harmful substances when burned, ensuring a minimal environmental impact.

6. Cost Efficiency

To reduce manufacturing and logistics costs, additives should be localized as much as possible to reduce dependency on imports. The formula should also be flexible enough to support future new product development.

Each of these quality criteria must be validated through detailed testing to ensure compliance.

Comprehensive performance data—such as hydrophilicity, compatibility, processability, and volatility—should be recorded and maintained to allow prompt troubleshooting and technical collaboration for future performance upgrades and product development.

Dyna Co., Ltd.
Industrial Lubricant Solution
E-Mail : dyna@dynachem.co.kr
Web : dyna.co.kr/en/

When we think of metalworking industries, we often picture massive machines roaring as they cut, bend, and stamp red-hot metal. In all these intense processes, there’s a hidden but crucial player—punching oil (also known as stamping or press oil).

At Dyna, we pride ourselves on our unmatched expertise in the field of punching oil. Our products are trusted by major domestic corporations and are exported to many countries worldwide, gaining global recognition. Today, let’s take a closer look at how Dyna Solution’s punching oils contribute to the creation of a wide range of metal products—from pin press dies to motor cores, the heart of electric vehicles, and heat exchangers.

Punching Oil: The ‘Universal Lubricant’ of Metalworking

Punching oil plays a pivotal role in resolving various issues that arise during high-impact metal forming and in enhancing product quality. Much like using oil in a frying pan to prevent sticking, it reduces friction between the die and the metal sheet.

• Reducing Friction & Heat Generation: It mitigates the intense friction and heat generated when the die and metal materials come into contact under high pressure. Since excessive heat can deform the die and degrade product quality, punching oil serves as a crucial protector.
• Extending Die Life: Less friction means less wear and tear on the die. This significantly extends the lifespan of these expensive and precisely crafted tools, contributing greatly to cost reduction in manufacturing.
• Improving Formability & Ensuring Product Quality: It helps metal materials transform smoothly into the desired shape without tearing or wrinkling. This leads to fewer defects and ensures products meet design specifications with clean and precise edges.

Thanks to these benefits, punching oil enhances productivity, reduces defect rates, cuts manufacturing costs, and improves energy efficiency across metalworking processes.

However, punching oil isn’t without its challenges. Costs are incurred, waste oil disposal raises environmental concerns, and oil mist can affect the working environment. Moreover, any residual oil on the product can interfere with subsequent processes or final product performance. Thus, post-application drying and treatment are essential.

1. Pin Press Dies: Stamping the Heart of Precision Parts

Pin press dies are used to produce very small and complex metal components (such as parts within electronic devices, automotive components, and heat exchanger fins). Here, punching oil acts as a key enabler of high precision and intricate shapes. It controls even the finest friction, ensuring that each tiny part is manufactured with perfect accuracy. In this type of precision processing, clean application and post-treatment of the punching oil are crucial.

2. Motor Core: The Hidden Tech in the Heart of Electric Vehicles

As the world shifts toward electric vehicles, motors are becoming increasingly vital. A core component of these motors, the motor core, is made by precisely punching and stacking thin silicon steel sheets. Punching oil is used in this process as well.

However, motor cores operate in environments where electricity flows and heat is generated. Residual punching oil can compromise electrical insulation, reducing motor performance and shortening its lifespan. To address this, manufacturers emphasize complete removal of the oil—this is where the drying process becomes critically important.

After punching, the motor cores pass through oven-like dryers via conveyor belts, where they are exposed to high heat. This step ensures that all punching oil either evaporates or dries completely, allowing the motor core to deliver optimal electrical performance in a clean state.

3. Food Containers: Also Used in Forming Thin Aluminum Foil Sheets

Various food container products, such as aluminum foil lunch boxes and silver foil packaging containers, are also made through the press process.
The material commonly used for this is thin, wide aluminum foil sheets, and to prevent friction and cracking of the metal, lubricant (taba oil) is essential.

Products intended for food containers must meet strict hygiene and safety standards, so careful consideration is needed when selecting lubricants.
In light of these special requirements, taba oils should not only ensure good forming performance but also facilitate easy cleaning after the process and minimize residue.

Invisible Lubrication Driving Industry Forward

Punching oil is more than a simple metalworking aid. It’s a core technology that affects the performance of precision components and the overall lifespan of products. As new challenges emerge—like workplace safety, environmental regulations, and efficiency in cleaning processes—punching oils are evolving too.

Lubrication technologies will continue to advance. Innovations that reduce environmental impact and improve operational efficiency are being actively developed. In this push toward sustainable manufacturing, the unseen yet vital role of punching oil is gaining even more importance.

At Dyna, we are at the forefront of this transformation, developing and supplying a wide range of punching oils to clients around the world.

Our product lineup reflects the diverse needs of industries such as motor core and heat exchanger manufacturing, contributing to improved productivity and product quality.

We will continue to adapt to changing manufacturing environments and customer demands, delivering safe and efficient metalworking solutions into the future.

Dyna Co., Ltd.
Industrial Lubricant Solution
E-Mail : dyna@dynachem.co.kr
Web : dyna.co.kr/en/