CNC milling parts are parts manufactured through CNC milling machine processing. CNC milling machine utilizes CNC technology to automatically control the tool movement according to the preset program. The workpiece is cut and processed, and finally formed into a part that meets the design requirements.
Machining Steps Of CNC Milling Parts
Every aspect of CNC milling a part requires precise operation to ensure the quality of the final part.
Create Drawings Of CNC Milled Parts
Begin by drawing a 3D model of the part and a 2D engineering drawing using CAD software. The drawings should contain all necessary information such as dimensions, tolerances, surface finish requirements, etc.
Define the machining datums on the drawings for positioning and tool setting during subsequent machining.
Writing CNC Program
Import the CAD model into the CAM software to generate the CNC machining program. the CAM software will automatically generate the tool path and machining code (usually G-code) according to the geometry, material properties and machining requirements of the part.
Cutting speed, feed rate, depth of cut and other machining parameters are set in the CAM software. Ensure that the machining process is efficient and tool life is reasonable.
Perform virtual machining simulation in CAM software to check whether the tool path is correct and avoid collision and overcutting problems.
Set Up The Machine For CNC Milling Parts
Use fixture or vise to fix the blank workpiece to ensure that the workpiece will not move during the machining process.
Select a suitable tool and mount it on the spindle. Make sure the tool is firmly installed to avoid vibration or offset during machining.
Determine the initial position of the tool and the origin of the workpiece coordinate system using a tool setting instrument or manual tool setting method. This step is critical and directly affects machining accuracy.
Transfer the generated CNC program to the control system of the CNC milling machine.
CNC Milling Parts Machining Service
Machining
After confirming that all settings are correct, start the CNC milling machine and begin automatic machining. The machine tool will automatically control the movement of the tool according to the preset program to carry out cutting and machining.
During the machining process, the operator needs to closely monitor the running status of the machine tool. If any abnormality is detected, the machine should be stopped in time for inspection.
At the same time, coolant or lubricant is used to cool and lubricate the tool and workpiece. It can reduce tool wear and improve machining quality.
Inspection
Use measuring tools to check whether the dimensions of the machined parts meet the requirements of the drawing.
Confirm that the surface quality of the part meets the requirements by using a surface roughness meter or visual inspection.
Check whether the form and position tolerances of the parts meet the design requirements by using CMM or other precision measuring equipment.
Post-processing The CNC Milling Parts
Clean the burrs and sharp edges of the parts.
Remove cutting fluid and debris from the surface of the part.
According to the design requirements, apply surface treatment to the parts to improve their corrosion resistance, abrasion resistance or aesthetics.
Final Inspection And Packaging
Ensure that the parts fully meet the design requirements and customer standards.
Pack the qualified parts appropriately to prevent damage during transportation and storage.
CNC Milling Parts Main Features
High Precision:
CNC milling machine can realize micron-level precision, suitable for precision parts processing.
High Efficiency:
Automated operation reduces manual intervention and improves production efficiency.
Complex Shapes:
Capable of processing complex geometric shapes that are difficult to realize by traditional methods.
Good Consistency:
CNC program ensures the consistency of each part, suitable for mass production.
Variety Of Materials:
Can process metal, plastic, composite materials and other materials.
Application
Aerospace:
Manufacturing engine parts, structural components, etc.
Automobile Manufacturing:
Producing engine, transmission, chassis and other components.
Mold Manufacturing:
For injection molding, die casting, stamping and other mold processing.
Electronics Industry:
Processing circuit boards, housings and other precision parts.
Medical Devices:
Manufacture of surgical instruments, implants and other high-precision medical equipment.
FAQs
Why does CNC milling cost so much?
This is because they cannot be manufactured without high-precision equipment, complex machining processes and the specialized skills of the staff.
What is roughing and finishing?
**Roughing** is the process of removing a large portion of the material to approximate the final shape, usually using a larger amount of cutting.
**Finishing**, on the other hand, is the subsequent step for obtaining the final dimensions and surface finish, using a smaller amount of cutting.
How to deal with vibration in machining?
Vibration can lead to poor surface quality and tool wear. Vibration can be reduced by lowering cutting parameters, improving clamping methods, using more stable tooling systems or adjusting machine rigidity.
How to set the correct cutting parameters?
This depends on the material, tool material and geometry. Cutting speed (SFM), feed rate (IPM), and depth of cut (DOC) generally need to be considered. Often reference is made to the tool manufacturer’s recommendations or empirical data.
How to customize CNC machining to satisfy particular needs?
Custom CNC machining requires detailed design drawings, material specifications and tolerance requirements. Communicate with us to ensure specific needs are met.
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