Dongguan Yexin Intelligent Technology Co., Ltd.
Precision in Every Part, Excellence in Every Detail
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Operating as a subtractive manufacturing process, CNC machining involves the creation of parts
by removing material from a workpiece or workpiece stock. The machine's movement is governed
by preprogrammed software and codes, ensuring precise control over material removal.
This expansive process includes a diverse range of machinery, such as turning mills, lathes,
grinders, and plasma-cutting machines.
Product Details
| Common Metal Materials for CNC Machining | |
| Metal Material | Properties |
| Aluminum | 2024: Good fatigue resistance and strength; excellent toughness at moderate to high strength levels; improved fracture toughness |
| 6061: Excellent machinability, low cost, and versatility | |
| 7075: High strength, hardness, low weight, and heat tolerance | |
| Stainless steel | Excellent machinability and outstanding uniformity; good workability and weldability, high ductility and formability |
| Steel Alloy | Mix of chromium, molybdenum, and manganese yields toughness, good torsional and fatigue strength |
| Brass | Versatile and highly attractive copper/zinc alloy with warm yellow color accommodates severe forming/drawing |
| Copper | High ductility and high electrical and thermal conductivity; develops attractive blue-green surface patina over time |
| Titanium | Excellent strength to weight ratio, used in aerospace, automotive, and medical industries |
| Steel Mild Low Carbon | High machinability and weldability, high stiffness; good mechanical properties, machinability, and weldability at low cost |
| Surface Finishes | ||
| Name | Applicable to | Machining marks |
| As machined | Metals, Plastics | Visible, light surface scratches |
| Smooth machining | ||
| Fine machining | Metals | Slightly visible |
| Polishing | Metals | Removed on primary surfaces |
| Bead blasting | Metals | Removed for non-cosmetic, removed on primary surfaces for cosmetic |
| Brushing | Metals | |
| Anodizing Type II | Aluminum | |
| Anodizing Type III | Aluminum | Visible under anodizing |
| Black oxide | Copper, Stainless steel, Alloy steel, Tool steel, Mild steel | Visible |
| Powder coating | Metals | Removed |
| Brushed + electropolishing | Stainless steel | Removed on Primary surfaces |
CNC Machining Applications
Parts produced by this type of machining are commonly found in the automotive, aerospace,
medical, marine, and hydraulic industries. Such as headers, housings, shafts, shells, knobs, rotors,
terminals, fittings, pistons, valve stems, and similar products.
Company Profile
FAQ's
1. What's the general surface texture of CNC milled and turned parts?
The surface texture of machined milled parts is commonly around 3.2μm (or 1.6μm for more
recent machines). In the case of turned parts, a finer surface finish is achieved, reaching a
roughness of 0.8μm. Notably, this enhanced surface texture in turning is accomplished without
the necessity of adjusting machining speeds.
2. What cosmetic standards do you guarantee?
Our commitment to quality includes standard deburring and edge-breaking procedures for all CNC
machined parts. Any critical edges requiring a sharp finish must be explicitly indicated in technical
drawings.
Surfaces are guaranteed to be free of defects such as scratches, dents, stains, blemishes, hanging
marks, and minor imperfections. Critical surfaces (primary (a) side, as specified in technical drawings)
will be void of mill steps and other marks.
For the secondary (b) side, minor hanging marks and up to 2 minor defects are deemed acceptable.
To enhance surface roughness, visual properties, and wear resistance, various post-processing and
finishing methods can be applied to CNC machined parts.
3. Machining Parameters Determined by Operators:
Most machining parameters are established by the machine operator during the generation of
G-code.
Build Size of CNC Machines:
CNC machines offer a notably large build area, especially when compared to 3D printers.
CNC milling systems can handle parts with dimensions up to 2,000 x 800 x 100 mm (78” x 32” x 40”).
CNC turning systems can machine parts with a diameter of up to Ø 500 mm (Ø 20’’).
Accuracy and Tolerances:
CNC machining enables the production of parts with high accuracy and tight tolerances.
Tolerances achievable with CNC machines can be less than half the diameter of an average human
hair, reaching ± 0.025 mm or .001’’.
If tolerance is not specified in the technical drawing, the operator typically machines the part with an
accuracy of 0.125 mm (.005’’).
Key Takeaways:
CNC machines excel in both build size and precision, making them suitable for a wide range of
applications.
Operators have the flexibility to set machining parameters based on the specific requirements of
the project.
Understanding the build size and achievable tolerances is crucial for designing parts that meet
precision and accuracy standards.