• June 21, 2024
  • Shatou, Changan, Dongguan, CN
CNC Machining of Aluminium

CNC Machining of Aluminium

Aluminum is an important metal material, which has high strength, good electrical conductivity, and excellent corrosion resistance, so it is widely used in various fields. In the CNC machining process of aluminum materials, high-efficiency and high-precision production can be realized, which improves product quality and production efficiency.

Aluminum CNC machining process

Aluminum CNC processing is the process of using CNC machine tools to automatically process aluminum. The process mainly includes the following steps:

1, Design drawings

First of all, you need to design the aluminum parts to be processed according to their shape, size, accuracy requirements, etc., and produce the corresponding CAD drawings.

2, Preparation of machining procedures

According to the design drawings, write the CNC machining program, covering the calibration of the machine coordinate system, the processing speed and the optimal configuration of the planning of the tool path and other parameters.

3, Machine tool clamping

Fix the aluminum parts stably and precisely on the CNC machine tool to ensure machining accuracy and stability.

4, Process processing

CNC aluminum processing according to the prepared processing program, including milling, drilling, turning, tapping and other operations.

5, Quality inspection

For machined aluminum components, we will conduct quality inspections to ensure that they meet the requirements. This inspection will include testing for compliance with design drawings, surface finish and dimensional accuracy of surface finish.

Aluminum for CNC processing

CNC machining aluminum

Aluminum AlloyDescriptionMachiningStrengthCorrosion ResistanceWorkabilityMain application

A medium-strength alloy with manganese and silicon as the main alloying elements. It has good mechanical properties and is quite machinable.FairMediumGoodGoodSuitable for architectural applications such as window frames, roofing, doors, railings, sign frames and store finishes.
3003A medium-strength alloy with a primary alloying element of manganese.GoodMediumGoodGoodSheet metal parts, piping systems, cookware, pressure vessels, chemical equipment and food containers.
2024This is a high-strength hard aluminum alloy belonging to the Al-Cu-Mg system, which can be heat-treated and strengthened.FairHighPoorPoorIt mainly makes skeleton parts, skins, spacer frames, wing ribs, wing beams, rivets and other working parts below 150°C on aircraft.
2011This is a high-strength alloy with excellent machinability, and high-speed machining produces fine chips that can be easily removed.ExcellentHighPoorPoorIt is mainly used to make precision gears, screw machines, pipe rods, pipe joints and precision mechanical parts such as cameras, speedometer clocks and parts.
1100Commercially pure aluminum, not heat treatable and strengthened, has low strength but good formability, ductility, corrosion resistance and weldability.GoodLowGoodGoodGraduated discs, heat exchanger fins, nameplates, and in the food processing and chemical industries. It is also suitable for applications requiring stamping, roll forming and bending.
60616061 has excellent machinability combined with mechanical properties and corrosion resistance.GoodMediumExcellentGoodElectronic parts, aircraft, chemical equipment, truck frames, military and marine components, and commercial bridges.
70757075 aluminum alloy is a cold treated wrought alloy with high strength, it is quite machinable and has high fatigue resistance.FairHighAveragePoorDefense components and aerospace, such as aircraft wings, missile components, gears, shafts and airframe structures.
5052This 5052 has high strength, especially fatigue strength, excellent weldability, high plasticity and corrosion resistance.PoorHighGoodGoodSheet metal parts for ships, transportation vehicles, aircraft fuel tanks and hardware.
2A12This is a high-strength duralumin that can be strengthened by heat treatment, has good weldability, and has low corrosion resistance.FairHighPoorGoodIt is mainly used for aircraft skeleton parts, skins, bulkheads, wing ribs, wing beams, rivets and other working parts below 150°C.

Tool selection and work parameter adjustment

When selecting aluminum CNC machining tools, factors such as processing form, cutting force, and materials need to be considered to select the most suitable tool. Generally, different types of cutters such as ball nose end mills, end mills, T-mills, and corner mills can be used.

In terms of material selection, cobalt-tungsten alloy inserts or CVD and PVD-coated tools can be considered. This can ensure that the selected cutting tools can meet the processing requirements and improve production efficiency and processing accuracy.

Challenges and handling in CNC machining of aluminum

CNC machining of aluminum is mainly faced with the following challenges:

1, The low hardness of aluminum, which is easy to deform and scratch and requires fine machining skills and machining parameter adjustment.

2, Aluminum has good heat dissipation, but is prone to deformation due to processing heat. In order to reduce this situation, it is necessary to adjust the processing parameters and select the appropriate processing fluid and tool to reduce the heat in the processing process.

3, The unstable performance of the aluminum process and the large difference in the performance of different brands and materials of aluminum requires a processing plan through specimen testing and data analysis.

4, Aluminum thickness and dimensions change drastically, and switching between different parts requires adjustments in processing parameters, tool selection, and clamping methods to ensure processing quality and efficiency.

The above challenges can be addressed by:

1, In order to ensure processing quality and improve efficiency, cutting parameters, fixtures and tools should be carefully selected.

2, By adjusting the proportion and usage of the machining fluid, the temperature and deformation of the workpiece during machining can be effectively reduced.

3, Conducting trial sample testing and data analysis on different brands and materials of aluminum to develop targeted machining solutions.

4, When changing tools for parts, it is necessary to adjust the processing parameters and tool selection in time to ensure the quality and efficiency of continuous production. According to different parts, corresponding processing parameters and tool selection are carried out to adapt to the production after tool change, so as to make the production process smoother and more efficient.

Characteristics and Advantages of Aluminum in the CNC machining industry

Aluminum is a strong, lightweight and easy-to-machine material that offers the following advantages and properties in the CNC machining industry:

1, Good corrosion resistance

Aluminum will form a dense oxide layer in the air, which can effectively prevent the corrosion of aluminum, so aluminum can also show good corrosion resistance in harsh environments.

2, Excellent thermal conductivity

Aluminum has good thermal conductivity, which can quickly transfer heat to other parts, making it remain stable under high-temperature conditions.

3, Lightweight

Aluminum is known for its lightweight properties, making it a better choice than other metals like copper and steel. Aluminum is much lighter for the same size, reducing the overall weight of the machine or component. This reduction not only enhances the stability of the machine, but also improves its operational performance.

4, Easy to process

Aluminum has excellent machinability and is able to smoothly carry out operations such as milling, drilling, cutting edges, etc. In the process of processing, problems such as thermal deformation and knife breakage rarely occur, so it can maintain a high working concentration.

5, High strength

Although the strength of aluminum is slightly lower than that of general steel, it can be achieved by different heat treatment methods and alloying treatments. The effect of this processing can meet the strong needs of different fields.

Application of CNC machined aluminum parts in various industries

Aluminum parts are widely used in various industries, the following are some common applications in the industry:

1, Aerospace industry

Due to the good mechanical properties and corrosion resistance of aluminum parts, CNC-machined aluminum parts can be used to make key components such as engines, aircraft parts, propellers and wings.

2, Automotive industry

CNC-machined aluminum parts are commonly used in automobile manufacturing and can be used to make components such as engines, bodywork, and transmission systems. Compared with traditional materials, aluminum parts are lighter, which can improve the performance and fuel efficiency of automobiles.

3, Electronic industry

CNC-machined aluminum parts are ideal for manufacturing a variety of electronic devices, including parts such as heat sinks, housings, and side frames. Aluminum parts have excellent thermal conductivity, which can effectively reduce the temperature of the device, thereby preventing overheating.

4, Medical equipment industry

Aluminum parts can be used in the manufacture of medical equipment through CNC machining, such as manual mechanical support frames, operating handles, connectors, etc. These parts are made of medical-grade aluminum to ensure the health and safety of the equipment

5, Machinery manufacturing industry

Aluminum parts can be widely used in various mechanical parts such as gears, bearings and couplings through CNC machining. This part has high strength and lightweight properties, able to show high mechanical manufacturing performance and efficiency.

Jmproto is the world’s leading CNC processing service provider for aluminum parts, and has a team of highly qualified machinists, designers, structural engineers and quality control experts.


We offer a complete aluminum CNC machining service, producing 15 different types of aluminum alloy materials with a variety of post-processing and surface finishing options. With our extensive experience, we are able to produce a wide range of aluminum machined parts, regardless of size and complexity.

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