Online CNC Machining Service
Overview: How CNC machining works?
What Is CNC Machining
How CNC Machining Works
After activating the CNC system, the product file will be programmed into the software and assigned to the corresponding tools and machinery. These tools and machinery will perform the specified cutting tasks. The CNC machining process includes the following stages:
– Design CAD Model
– Convert CAD file to CNC program
– Prepare CNC machine and tools
– CNC Machining operations
Main Processes Of CNC Machining
– CNC Milling: Use a multi-point rotating tool to remove material from the workpiece. Basic mills consist of a 3-axis system (X, Y and Z), which is still one of the most popular and widely used machining processes. In 3-axis machining, the workpiece remains fixed, and the rotating tool cuts along the x, y, and z axes. Meanwhile, most newer mills can accommodate two additional axis, 4-axis CNC machining and 5-axis CNC machining have higher versatility, and they are often used in the production of high-precision parts.
– CNC Turning: Use a single-point cutting tools to remove material from the rotating workpiece. In CNC turning, the CNC machine, typically a lathe or turning machine, feeds the cutting tool in a linear motion along the surface of the rotating workpiece, removing material around the circumference until the desired diameter is achieved. Most CNC lathes consist of two axis, X and Z.
Features of CNC Machining
Advantages
Fast and Repeatable
Quick removal of large amounts of metal material, parts ready as fast as 1 day
Scalable Volume
CNC Machining has scalable volumes for production of 1-100,000 parts.
Accuracy
High-precision tolerances ranging from +/-0.005″ – 0.01″, depending on customer specs.
Custom Surface Finishes
Suitable for many different kinds of substrates, make your parts just the same as real products.
Wide Range of Materials
Choose from over 50 metal and plastic materials.
Cost Saving
Low investment in tooling and preparation costs, economical for parts with simple structure.
Drawbacks
Structure Limits
Interlocking and hollowed structure is difficult to be machined with CNC.
Scale Effect
The unit cost and lead time will not be reduced as much as injection molded parts.
CNC Machining Processes
3-axis CNC milling
CNC milling is a subtractive manufacturing process that uses 3-axis milling and 5-axis indexed
5-axis CNC machining
5-axis CNC machines can produce parts with complex geometries and increase productivity by minimizing the number of machine setups.
CNC Turning
CNC turning with live tooling combines both lathe and mill capabilities to machine parts with cylindrical features from metal rod stock.
CNC Common materials
Metal
- Aluminum
- Stainless steel
- Brass
- Copper
- Titanium
- Mild steel
- Alloy steel
- Tool steel
- Spring steel
Plastic
- ABS
- Polycarbonate (PC)
- Nylon
- Polypropylene (PP)
- POM
- PTFE (Teflon)
- PMMA (Acrylic)
- Polyethylene (PE)
- PEEK
- Bakelite
- FR4
- Rubber
- Carbon Fiber
Our standard surface finishes
- Standard (As-Milled) (Ra 125μin)
- Anodized
- Black oxide
- Bead Blast
- Spray painting - High gloss paint
- Powder Coat - High gloss
- Zinc plating
- Silver plating
- Tin plating
- Vacuum plating - Matt paint
- Silkscreen
- Smooth machining (Ra1.6µm, 63 µin)
- Electrophoresis
- Etching
- PVD (Physical Vapor Deposition)
- Bead blast + Anodized color
- Electrically conductive oxidation
- Brushed
- Spray painting - Matt paint
- Powder Coat - Matt paint
- Chrome plating
- Nickel plating
- Gold plating
- Vacuum plating - High gloss paint
- #1000 sanding
- Laser engraving
- Chemical conversion coat (Chem film)
- Passivation
- Electropolished (Ra0.8µm, 32µin)
- Pickling
- Dyeing
CNC orientation and form general tolerances
Unless we have agreed to other tolerances in your Quote, we will work to achieve and hold the tolerances noted below, which will vary per the primary manufacturing method you select. (eg.:Round hole 10mm, tolerance +0.01—0.03mm)
- 0 to 12"(300 mm)
- 12" to 24"(600 mm)
- 24" - 36"(900 mm)
- 36" - 60"(1500 mm)
- Over 60"
- +/- 0.005" (0.125 mm)
- +/- 0.010" (0.250 mm)
- +/- 1/64" (0.016")(0.400 mm)
- +/- 1/32" (0.031")
- +/- 1/16" (0.063")
- Angularity +/- ½ degree
- Angularity +/- ½ degree
- Angularity +/- 1 degree
- Angularity +/- 1 degree
- Angularity +/- 1 degree
Size limitations for CNC machining
- Maximal part size
- Minimal part size
- Minimal diameter
- 1000 mm (40in)
- 2 mm (0.08 in)
- 0.3 mm (0.01 in)
Bring Your Design to Life with Expert 3D Printing!
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Leading the Way in 3D Printing
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- Expertise and Experience
- State-of-the-Art Technology
- Custom Solutions
- Fast Turnaround Times
- High-Quality Standards
- Affordable Pricing
- Sustainable Practices
- Dedicated Customer Support
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Product Designer
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Project Manager
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Mechanical Engineer