how to hold cut out small parts on cnc

How to Hold Cut Out Small Parts on CNC

CNC machines have revolutionized the world of manufacturing. They have made it easier for businesses to produce complicated parts in large quantities. However, one of the biggest challenges that come with using CNC machines is holding small parts securely. In this article, we will explore some of the tips and tricks that can help you hold cut-out small parts on CNC machines.

1. Clamping Techniques

Clamping is the most common method used to hold small parts on a CNC machine. It involves using clamps to hold the small part onto the machine table. There are different types of clamps that can be used for this task, such as screw-down clamps, toggle clamps, and pneumatic clamps. The type of clamp you choose will depend on the size and shape of the small parts you are working with.

When using clamping techniques, it is essential to ensure that the clamp does not interfere with the CNC machine's tool path. The clamp should be positioned in a way that allows the cutting tool to reach all the areas of the part that need to be machined.

2. Vacuum Fixturing

Vacuum fixturing is another common method of holding small parts on CNC machines. It involves using a vacuum pump to create a vacuum between the part and the machine table. This creates a strong holding force that keeps the small part in place while it is being machined.

The vacuum fixturing technique is best suited for small, flat parts that have a large surface area. However, it can also be used for parts with irregular shapes. To use this technique effectively, it is important to ensure that the part is clean and free of any debris that could compromise the vacuum seal.

3. Magnetic Chucking

Magnetic chucking is another effective method for holding small parts on CNC machines. It involves using a magnetic chuck to hold the part in place while it is being machined. The magnetic chuck creates a strong holding force that keeps the small part in place.

Magnetic chucking is best suited for parts that are made of magnetic materials such as steel and iron. However, it can also be used for non-magnetic materials with the use of a magnetic insert. It is essential to ensure that the magnetic chuck is properly positioned and that the part is securely held before starting the machining process.

4. Glue Fixturing

Glue fixturing is a technique that involves using glue to hold small parts on the CNC machine's table. The glue creates a strong bond that keeps the small part in place while it is being machined. This technique is best suited for parts with irregular shapes or those that cannot be held securely using other methods.

To use this technique effectively, it is important to use the right type of glue and apply it correctly. The glue should be applied evenly to the part and the machine table to ensure a strong bond. It is also important to wait for the glue to dry completely before starting the machining process.

5. Spring-loaded Clamps

Spring-loaded clamps are another effective method for holding small parts on CNC machines. They are designed to automatically adjust to the thickness of the part, providing a secure grip without damaging the part.

Spring-loaded clamps are best suited for small, thin parts that are difficult to hold using other methods. They are easy to use and can be quickly adjusted to hold different sizes of small parts.

Conclusion

Holding cut-out small parts securely on CNC machines is essential for ensuring high-quality production. There are different methods that can be used for this task, such as clamping, vacuum fixturing, magnetic chucking, glue fixturing, and spring-loaded clamps. The method you choose will depend on the size, shape, and material of the small parts you are working with. By following the tips and techniques outlined in this article, you can hold small parts securely on CNC machines and enhance your manufacturing processes.