What Is Precision CNC Machining?
High-precision CNC machining is a specialized form of manufacturing that uses CNC technology and highly accurate CAD models to manufacture parts with very tight tolerances. Often, beginners do not understand the concept of tolerance. Let us explain in simple words. It is tough to meet dimensional accuracy in traditional CNC machining CAD design.
On the other hand, in high-precision CNC machining, working with dimensional accuracy becomes a paramount choice. For instance, in traditional CNC machining, if the tolerance is a few hundredths of a millimeter, but in high precision CNC machining, they can be as small as a single micron. It is equal to the width of human hair.
Let’s think of another way by giving a typical example.
Regular machining is like baking a cake following a recipe. You will find some gaps in design and width. Precision CNC machining is like using a 3D printer to make a cake, which precisely prepares the product following the given design.
Examples of Precision CNC Machined Parts
Surgical instrument
rocket engine parts
joint replacements
What Is The Difference Between CNC Machining And Precision Machining?
precision machining vs cnc machining
Compared to traditional CNC machining, high-precision CNC machining involves tighter tolerances. Moreover, this method meets the high level of dimensions. The deviations are minimal. Manufacturing CNC precision machining parts demands high accuracy, precise tooling, and impeccable programming techniques.
Similarly, precision machining provides smoother surfaces compared to traditional machining methods. However, precision CNC machining typically incurs higher costs due to maintaining the quality standards.
Precision CNC machining is different from traditional machining in multiple ways, such as:
Feature CNC Machining Precision CNC Machining
Focus General-purpose machining Manufacturing custom with extremely tight tolerances
Tolerance Level Broader range, typically in the 0.005 – 0.1 mm (0.0002 – 0.004 in) range Tolerances range in the micron (thousandth of a millimeter) range
Repeatability Good repeatability Exceptional repeatability with minimal variations
Machine Types Mills, lathes, routers, etc. High-precision CNC machines
Applications Suitable for a wider range of parts, from prototypes to production components Medical devices, aerospace components, and other complicated molds
Cost Generally less expensive More expensive
Also Read:
CNC Machining vs Manual Machining
Advantages Of Precision CNC Machining
Precision CNC machining delivers significant advantages. Currently, the most modern manufacturing method allows you to make custom metal parts with the most complex designs. Interestingly, with precision CNC machining, we can achieve high accuracy. That is what makes it dominant over other manufacturing methods.
Precision CNC machining’s most crucial advantage is the high precision of manufactured elements, which is practically impossible to achieve in the case of manual processing.
These capabilities translate into several advantages for different industries. Let’s take a deeper look:
Higher Accuracy and Repeatability
Precision CNC machining particularly excels in measuring tolerances in microns. These tolerances ensure that all final products meet the desired results. For instance, their performance should be optimum in industries like medical devices and aerospace components.
Since CNC precision machining is an automated technology, it eliminates even minor human errors during the machining process. Each part is manufactured in a replica of the design, ensuring flawless repeatability.
Freedom Of Design
Precision CNC machining can efficiently handle complex designs and geometries. On the other hand, traditional machining struggles with making parts with complex designs. By incorporating, advanced toolpaths and multi-axis machining capabilities, high-precision CNC machining centers can manufacture high-precision parts with any complexity.
Ultimately, these features give exceptional freedom to the CNC parts designer to play with any design that greatly fits the machines for better performance. Hence, they can make more precise parts required for the medical and automotive industries.
Wider Choices of Materials
One of the best features of precision CNC machining is its ability to execute a variety of materials. Its capability is not specific to the metals only but it can work on plastic and other exotic materials like titanium and Inconel. Hence, this feature allows the manufacturers and designers to choose the best material to fulfill their project requirements.
Since mass production is costly, a better choice of material is far more important so a specialized high-precision CNC machining service can effectively guide you about this.
Excellent Productivity and Efficiency
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Размерные допуски
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Геометрические допуски
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Tool Wear
Material Properties
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Удержание заготовки
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Фрезы с ЧПУ
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Aerospace Industry
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Автомобильная промышленность
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Электроника
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Defense
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Сталь
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Weight limitations
Heat and corrosion resistance
High costs Harder materials
Plastics * ABS
* Polycarbonate (PC)
* Engineering thermoplastics (PEEK, PEI) * Lightweight (ABS)
* Transparency (PC)
* Heat resistance (engineering thermoplastics) * Strength requirements
* Weight limitations
* Impact resistance (PC)
* Chemical resistance * Generally softer and easier to machine than metals
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How precise is a CNC machine?
Precision CNC machining is quite effective compared to the traditional methods. It is not only consistent but also provides high dimensional accuracy. The precision of CNC machines is measured in tolerance. For instance, a tolerance of ±0.01mm tells that a high-precision machine can manufacture parts with a dimension that’s within 0.01mm above or below the exact programmed value.
What is a precision machining process?
The process of precision machining involves 5 key steps such as:
Design & Plan:Parts design which is generally known as CAD.
Material Selection:Suitable material to make the part.
Machining:High-precision CNC machines (computer-controlled) remove material using milling, turning, drilling, etc. methods based on the design.
Inspection:Engineers check the part for dimensional accuracy or any issues.
Finishing:To give a better look to the final part, surface finishing such as polishing and grinding is used.
