Home Forums Quality Inspection Proper quality inspection of CNC parts

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    Jake Able

    Have you just developed plans and drawings for a new prototype of a product, or do you need to produce a new part that needs to be machined? If so, you might opt to outsource your manufacturing to a different company that offers CNC machining services.

    However, how can you guarantee high-quality machined parts when your third-party machine shop is on the other side of the world and you are unable to be present to oversee component fabrication?

    Graham Steven

    Machine Tool Accuracy Test: In this mode, examine the machine tool’s precision in movement and centering. Verify a number of additional factors, such as the spindle, bracket, axis, etc. The primary shaft ought to be parallel to the work surface. The shaft’s bend and angle must be precise. Investigate the linear axis.
    Test for Parts or Products: In this mode, examine the part’s dimensions and placement. This also entails inspecting variables including location, surface quality, and shape. Additionally, verify the geometric and dimensional tolerances in accordance with the needs or applications.
    Process monitoring and control involves reviewing the procedures in the process at each level to prevent errors that could result in faulty goods or unneeded manufacturing delays. The product life cycle has several stages, beginning with ideation or conceptualization. Design, a feasibility study, analysis, the trial production phase, testing, mass manufacturing, etc. follow. Here, all levels are involved in the quality check.

    Checkpoints During the CNC Machining Quality Inspection
    When inspecting the quality of CNC machine tools, you should look at the following factors, among others:
    Rapid prototyping must be accomplished when a part is produced on a CNC machine tool. Make sure your machine can produce the necessary goods and prototypes.

    Eddie Warren

    1 – Certifications are Important
    You must look for the qualifications that any potential machining vendor has first when obtaining information about them. The ISO 9001 certification is one that is essential to look for.
    A standard that outlines the specifications for quality management systems is ISO 9001. By guaranteeing top-notch machining services, a machine shop with ISO 9001 certification follows completely to statutory and regulatory regulations.
    The type of CNC machining equipment that the machine shops’ facilities are equipped with must be determined after you have made sure that their certificates fit your criteria.

    2- The Quality of Machined Parts Is Affected by the Type of Machining Equipment
    a 5-axis CNC device
    The quality of the parts you’ll receive is significantly influenced by the kind of CNC machines that are utilized to make prototype (or production) parts. There are many different types of CNC machines, and they are often categorized according to how many axes they can control, such as 2-, 3-, 4-, and 5-axis CNC machines.
    5-axis CNC machines are more advanced than 2-, 3-, and 4-axis CNC machines, as one might expect. They provide greater surface polish and relational accuracy, but more significantly, they can machine complicated shapes. Although 5-axis machining (like the one shown above) is not necessary for all parts, if a part is sufficiently complex, it can be the best option.
    Advanced CNC machining technology is used by third-party machining vendors in their facilities to produce high-quality machined parts. However, there are other things to watch out for when choosing a third-party machining vendor!
    The level of skill of the CNC operators who will be creating your parts will also have a significant impact on the quality of the machined components.

    3 – The Technician Operating the Machine Determines the Quality of CNC Machining
    Even though the factory talked about certificates and cutting-edge machining technology, there have been several horror stories of clients receiving subpar and useless CNC made parts. These problems are typically linked to the CNC machine operators.
    In actuality, there is a shortage of skilled CNC machine operators. Operators who have gone through the “school of hard knocks” and are prone to repeating the same machining errors are oversaturated in the machining market.
    And to make matters even more difficult, a lot of machine shops don’t have a consistent quality management system to check the components that their operators or technicians are fabricating. These sellers are the ones you should avoid.

    4 – Three Types of Inspection Are Performed by Top-Notch CNC Machine Shops
    CMM machine used by Gensun QC Team for CNC quality control
    Three types of inspections are routinely performed by top machining shops at various stages of the manufacturing project:
    The machine operator does numerous article inspections while (or right away following) milling in order to spot any difficulties with tolerance. Simple measurement devices like micrometers and go/no-go gauges must be used.
    Inspection using in-process probing is a term used to describe an automated method of employing programmed probes to check a part’s important characteristics and tolerances during CNC machining. These probes automatically keep an eye on the process and change the cutting tools and work coordinates as necessary.
    The inspection stage is carried out on CNC machined parts by a team of quality control experts and is referred to as inspection in the quality control (QC) department. To make sure that products meet client requirements, these QC specialists use height gages, microscopes, 2D projectors, micrometers, and coordinate measuring machines (CMM). One of our Gensun QC team members is shown using a CMM machine in the image above.

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