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Tips for improving your CAD designs for CNC Machining

CNC machining can be utilized to make plastic and metal components that require drilling or cutting. It’s an affordable and efficient method to create these parts. This manufacturing technology has seen significant improvements throughout the years. Now, you can make it according to your specifications using the CAD software.

To ensure quick delivery to the market, you must to get your CAD design correct. This will help avoid revisions and work rework. Revisions aren’t easy if your model is not optimised for the particular manufacturing process.

Tips to Improve Your CAD Design to be CNC Machining

These suggestions can help you improve your autocad design, while making it more cost-effective and compatible with CNC machine.

Features for CNC Design

The CNC machine’s machining process can be complicated if you add unnecessary features. It is best to thoroughly research the capabilities of the CNC machine before adding features which will have no impact on the performance of the piece.

Curved holes are one instance of a design feature that CNC machines, lathes and drills can’t produce. If you are not adding these features to improve the aesthetics of your product, then you should take it off the list.

Make sure you’re exact with the ratios of width-to-depth

Your CAD design will be greatly improved when you look at the cavity depth to width ratio. Tool hanging issues, chip evacuation problems, tool deflection and tool hanging can all be result of deeper cavities.

Cavities which are six times greater than the diameter of the tool are thought to be deep. They should not be more than 60mm deep.

Do not use tolerances too often

It is crucial to maintain tight tolerances. Tolerating too much could lead to increased costs and time for the machine. The machine will adjust to its normal tolerance if the dimensions do not fall within the tolerance range of.

Do not use tight tolerances to cut down on time and costs. You must have homogeneous tolerances to minimize time spent setting up the machine.

Radii when designing internal edges

The majority of cutting instruments are cylindrical and are unable to making sharp edges. You should radius the edges of the CAD files.

You should make internal edges that don’t overload the tool. This will allow you to avoid damaging to the CNC milling tool. You can accomplish this by extending the radius of your milling tool by 130 percent.

Avoid redundant aesthetics

Think about the material that will be removed, as well as the process involved if you’re adding aesthetic features or creating parts with visually appealing. Take into consideration whether 5-axis, 3-axis, or 5-axis processing is required.

Concentrating on the basics will increase the accuracy of your computer-aided design (CAD) model. Certain post-machining processes can improve aesthetics.

Avoid designing thin walls

Research has proven that the stiffness of a wall thickness is correlated with the thickness of its walls. This means that thin walls may have a negative impact on the stiffness of the material. A reduced stiffness of the material would lead to a lower accuracy due to vibrations during processing. For plastics the wall thickness for the minimum is 1.5mm and for metals, it’s 0.794mm.

Don’t design small features

The minimum tool diameter required for CNC machines is 2.5mm. It means that any features smaller than 2.5mm are very difficult to machine. For small-sized features require specific tools. This increases the machining time and costs. If they’re not needed, it’s recommended to stay clear of smaller features.