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CNC machining and 3D printing: the advantages of CNC machining over 3D printing

Speaking of CNC machining, this is a different manufacturing method from 3D printing, mainly in terms of working principle, cost, surface finish, etc. What is the difference between 3D printing and CNC machining? Introducing the advantages of CNC, you can have a deeper understanding of the two technologies.

What is 3D printing?

3D printing, also known as additive manufacturing, is the process of creating three-dimensional objects from digital files. 3D printed products are created by depositing successive layers of material. 3D printing is popular for making jewelry molds and custom gifts in a variety of materials.

Advantages of CNC machining

1. Better surface finish

CNC machines can provide a better surface finish than 3D printers because the material does not deform during processing, and the rigid material and cutting motion hold the part together with little to no error or deformation. The surface finish of 3D printing is relatively poor due to the lamination of heated plastic materials.

2. Improve prototype integrity

CNC machines do not heat the material, creating components that maintain better structural integrity, whereas 3D printers must heat the material to build the intended product, sometimes adding and mixing other materials to make a prototype.

3. Prototyping is easier

CNC machining is more suitable for prototypes that can withstand structural testing, and it can build prototypes using the exact materials used to create the final product. Structural tests and changes will be more accurate because they use the same material, which can speed up the production process, and changes are in design rather than material. 3D printers do not build prototypes with structural strength, so they cannot be physically tested.

4. Cost-effective

The cost of cost-effective 3D printing is determined by the quantity of materials required, but the quantity of the final product does not determine the price of the CNC machine. For large-volume orders, CNC machining is more cost-effective.

5. High precision

CNC machining is more precise, so CNC machined parts have better tolerances than 3D printed products. Prototypes with shafts or connections to other parts will be of higher quality and more likely to fit other parts.

6. Reduce costs

When it comes to choosing a manufacturing method for a product, CNC machining is generally less expensive than 3D printing, and it is efficient, accurate and economical.

The difference between 3D printing and CNC machining

3D printing is an additive manufacturing method. What is the difference between additive manufacturing and CNC machining?

1. Scope of production. The machinable range of 3D printing technology is larger than that of CNC manufacturing. 3D printing has a high degree of freedom and can make difficult or impossible geometries that cannot be done by CNC.

2. Development level. The CNC machining industry has a mature set of standards, including spindles, tool interfaces and control systems, but there is no such established standard in the 3D printing field.

3. Product volume. 3D printing is difficult to make very large pieces, but CNC can handle it.

4. Process type. 3D printing is an additive manufacturing method that builds up models, while CNC is a subtractive manufacturing process that continuously cuts and removes the entire raw material.

Shenzhen Xiehe Company is mainly engaged in the production and manufacture of non-standard precision hardware parts. It has been deeply involved in the industry for many years and has rich experience. If you have requirements for CNC lathe machining and five-axis machining services including aluminum, copper, stainless steel, iron, titanium alloys, plastics and other products, you can contact Xiehe, and we will provide you with an integrated solution.