Milling guide -What is a carbide end mill used for?
End mills are the cornerstone of manufacturing and are the core cutting tools for basic and precise machining of various materials. Choosing the right end mill not only improves the quality of the machined product but also extends the service life of the tool itself. Therefore, selecting the appropriate end mill helps you better control the overall success of your manufacturing tasks.
This article will guide you step by step through the basic information about end mills to help you determine which type is most suitable for processing your products.
What is an end mill?
An end mill is a type of milling cutter used as a cutting tool in industrial milling applications. Their end structures come in various shapes, such as round (ball-nose), tapered, or square. They are most commonly used with milling machines or CNC machining centers, where the equipment moves the material or tool to bring them into contact for cutting, thereby achieving the desired dimensions or shapes.
Milling cutters can perform axial and radial cutting and are used in milling applications such as contour milling, profile milling, face milling, and slot milling.
Structure of a carbide milling cutter
A standard carbide end mills must have the following structure
Shank: Used for stable clamping by the machine
Sharp cutting edges: The end edge is used to remove bottom material and perform downward milling, while the side edges are used for efficient lateral cutting.
Flutes: Used for continuous and effective chip removal.
These structures form a standard carbide milling tools, capable of creating various shapes on materials such as metal, plastic, and wood.
However, to make it “user-friendly,” it must be customized according to the characteristics of the material being processed.
What should be considered when machining different materials with end mills?
This section will begin with the concept of “customized end mills” to reveal the challenges and solutions faced by end mills when machining different materials.
Aluminum alloy machining
Aluminum is a relatively soft and easy-to-cut metal, but it melts and fuses to the tool very easily, reducing its sharpness. Therefore, the following details must be taken into consideration when machining aluminum alloys.
2-3 flutes: Maximizes chip evacuation.
Polished flute surfaces: Enhances chip evacuation speed and effectively prevents chip adhesion.
Sharp cutting edges: Reduce heat generation during cutting.
Larger rake angles: Enable faster material removal.
Tool surface treatments: Such as anodizing or DLC coating (diamond-like carbon coating) ensure smoothness and sharpness while isolating temperature.
Cooling lubrication: Coolant effectively lowers temperature and improves chip removal.
Stainless steel machining
Stainless steel is a high-strength, high-hardness metal with characteristics such as easy work hardening and long chips. This can lead to tool wear, chip wrapping, and surface quality issues.
4 or 4+ flutes: Stable cutting and chip removal.
Large core diameter: Ensures tool rigidity, reduces deflection, and supports higher feed rates.
Blade Dulling: Effectively prevents contact-induced chipping.
Coating: Utilizes hard, high-temperature-resistant coatings to extend tool life, such as AlTiN, TiAlN, TiCN, and TiN.
Chip-breaking Grooves: Cuts chips into smaller segments to prevent tool breakage from chip wrapping or surface finish issues caused by chip wrapping on the workpiece.
Titanium Alloy Machining
Titanium alloys have low thermal conductivity, making it difficult for heat to dissipate during the cutting process. Instead, heat concentrates in the cutting zone, causing the tool tip temperature to rise to 1000°C, accelerating tool wear and reducing part accuracy.
High-hardness materials: Use cemented carbide or metal ceramic materials.
Coatings: Apply hard, high-temperature-resistant coatings to extend tool life, such as AlTiN, TiAlN, TiCN, or TiN.
Helix angle: A 30° helix angle provides better surface finish and tool life, while a 45° helix angle performs better in chip evacuation and cutting force.
Large front angle: Increases cutting speed but slightly reduces tool life; requires balancing data.
Coolant: Coolant effectively lowers temperature and improves chip evacuation.
Chipbreaker: Cuts chips into smaller segments to prevent them from wrapping around the tool and causing breakage, or wrapping around the workpiece and affecting surface finish.
Summary
Selecting the right milling cutter is crucial for machining. Contact us to receive exclusive advice from our engineering team.
We also offer an online customization channel. Click here to create a milling cutter for your project online.
If you would like to learn more about customizing other tools, visit our quick customization interface for more information.
FAQ
How to select the right end mill
The appropriate end mill depends on the material being machined, workpiece size requirements, rough/finish machining, obstacle interference, program writing, and machine tool maximum depth. Generally, the harder the material, the more flutes the tool should have.
What is the difference between a face mill and an end mill?
A face mill is primarily used for large-area material removal on the workpiece surface. With industry development, more companies now opt for milling discs for face milling. End mills have a smaller diameter than face mills, enabling more precise cutting and access to narrower spaces.
Can the side of an end mill be used for cutting?
Both the end face and sides of an end mill are equipped with cutting edges for material removal, contour milling, and can be used to machine cavities, slots, shoulders, and hollows by moving along the X, Y, and Z axes.
