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How to choose the processing method 3D printing or CNC machi

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In recent years, the topic of 3D printing has become more and more popular, and it is getting more and more hot. What is the difference between the two and the traditional processing giant: CNC machining? The Antarctic Bear then compares the specific differences between the two different processing methods.

    3D printing principle

    The principle of 3D printing is made by using special materials, layer by layer of "stacking", commonly known as additive manufacturing.

    Simply speaking, the CNC machining principle is to cut and process the entire piece of material into a specified shape of the product, also known as reduced material manufacturing.

1

    Different materials

    Generally, the hand material CNC can be processed.

    1. Plastic hand board materials are: ABS, acrylic, PP, PC, POM, nylon, bakelite, etc.;

    2, hardware hand board materials are: aluminum, aluminum-magnesium alloy, aluminum-zinc alloy, copper, steel, iron, etc.;

    Currently, 3D printing (SLA) processing materials, photosensitive resin is the most common.

    Different material utilization rates

    3D printing, due to its unique additive manufacturing, material utilization is extremely high.

    CNC machining, due to the need to cut the entire piece of material, and then get the final product, so the utilization rate of CNC processing materials is not high.

    Processing comparison

    program:

    3D printing: The built-in driver software automatically calculates the printing time and consumables.

    CNC machining: Professional programmers and operators are required.

    Number of processing:

    3D printing: As long as the tray is sufficient, multiple parts can be printed at one time without manual guard.

    CNC: Only one part can be machined at a time.

    3D printed painted phone case

    Processing time:

    3D printing: Since 3D printing is formed at one time, the printing time is fast.

    CNC machining: programming, processing takes longer than 3D printing.

    Process complexity (surface and heterosexual structure)

    3D printing: parts that can process complex surfaces and structures of opposite nature, once formed

    CNC machining: parts with complex surfaces and structures of opposite nature need to be programmed in multiple steps and disassembled.

    Different precision and success rate

    3D printing: WYSIWYG, high printing accuracy and high success rate.

    CNC machining: There are cases where human error or poor fixture causes machining failure.

    3D printed surface complex products are different in practicality

    3D printing: The molded product has the disadvantages of low strength and less wear resistance.

    CNC machining: molded products have the advantages of high strength and wear resistance.

    Why is CNC still the first choice for business?

    In the above comparison, 3D printing seems to have more advantages than CNC machining, but in actual situations, why is CNC machining still the preferred process for enterprises? The reasons are as follows:

    1. Economic advantage. When processing large and heavy parts, CNC processing prices are much more favorable than 3D printing.

    2. Processing standards. CNC machining has evolved over a long period of time and a complete set of standards has been developed in the industry, including spindles, tools and control systems. But 3D printing does not currently have such a molding standard.

    3. Awareness. Many enterprises are completely in a strange stage for 3D printing. Due to unfamiliarity and distrust of this process, they often choose CNC machining that they are familiar with and understand when facing the choice.

    Customer: "This is a drawing, how much does it cost to process it?".

    3D printing: "100 yuan!".

    CNC machining: "I am also 100 yuan!".

    Customer: "So I have to add a small handle to this part of the part?"

    3D printing: "100+20, 120 yuan!".

    CNC machining: "100+200,300 yuan!".
    Customer: "Play me!

all rights reserved :Wanbang Technology (Guangdong Dongguan City) Co., Ltd.

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