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Using CNC machining is a great way to create precision components, whether you''re manufacturing a robot or making a medical instrument. However, it''s important to understand the design process before you start machining a part. This will help you to make sure you''re getting the most out of the process.
First, you''ll need to decide how big your part is. The size will depend on how complex the features are in the part. The larger the dimensions, the more time it takes to manufacture the part. CNC machining can work with a variety of materials, so you''ll want to consider what kind of material will work best.
Once you''ve determined the size of your part, you''ll need to decide on a suitable tool. The tool can be a boring tool or an end mill. You''ll also want to decide if you want to have a specialized tool for certain types of holes.
Generally, the minimum wall thickness of a CNC machined component should be about 1.5 mm for plastics and 0.8 mm for metals. This is a minimum thickness that will allow the part to be accurately machined. If the wall is thinner, the part can be susceptible to vibrations and breakage. Thin walls can also reduce the precision of the part, increasing costs and processing time.
Another thing to consider when deciding on a CNC machined part is the tolerance. This refers to the acceptable range of dimensions. Most CNC machine shops will use general tolerances, such as +/-.005 inches, but you''ll want to be sure to check with your machinist about the specifics.
One other thing to consider is the shape of the part. For example, you might want to consider adding filets to the corners of a part to speed up the machining process. However, you''ll want to avoid a lot of sharp corners and thin walls, as these can be very difficult to machine.
You''ll also want to make sure that the features in your part are well-constructed. A minor mistake can lead to a malfunctioned product or medical misdiagnosis. This is especially true if you''re manufacturing a part for the medical industry.
The size of the holes will also need to be determined. Holes should be at least 2.5 mm in diameter to give the part a high level of accuracy. If the hole is larger than this, it may require a specialized tool for machining.
If you''re not sure about the complexity of your design, you can use technical drawings to help you cross-check your tolerances. This will save you a lot of time and effort, as well as help you to communicate better with your machinist.
The best way to find a machining company is to look for ISO certifications. This will ensure that you''re working with a company that has expert engineers on hand to deal with any machining issues. You can also ask around and look for recommendations. A qualified company will also have advanced tools on hand.
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