Today, we are specifically talking about CNC aluminum alloy processing technology and practical operations. Because the total number of CNC aluminum alloy processing parts is relatively large, the practice, cycle time and general commodity processing operations of CNC aluminum alloy processing are relatively large. Specifications and processing technology are not the same.
Processing technology of CNC aluminum alloy processing
1. The processing technology The road surface has great variability. A component or commodity can have a variety of processing technologies, and the production process requires a wide variety of mechanical equipment and fixtures;
2. Because hardware manufacturing enterprises are mainly scattered processing, the quality and productivity of goods depend to a large extent on the technical strength of employees, and the level of automation technology is key at the module level, such as CNC lathes, flexible manufacturing, etc.;
3. Commodity parts generally adopt the method of close combination of self-made and entrusted processing. For example, unique processing techniques such as electroplating, sandblasting, air oxidation, and silk-screen ink laser marking will be authorized to entrust external manufacturers to process;
4. There are many parts required, and the production workshop usually requires filling out a lot of material requisitions on the spot and will see production orders in the shape of a “line”. If there is process management, it is necessary to fill in a lot of processing technology transfer orders.
Process and details of CNC aluminum alloy processing
1. Aluminum profile cutting
Aluminum profile cutting is the most basic and common processing method in the CNC machining process of aluminum profiles. Since the standard size of industrial aluminum profiles is 6020mm, only aluminum profiles of different lengths or angles can be assembled into a frame.
2: Punch holes
Industrial aluminum profiles have a variety of connection methods, which need to be punched according to different connection methods. Common punching methods include through holes and stepped holes.
(1) Through hole:
Mainly used for the fastened connection of common bolts (semi-round head).
(2) Step hole:
It is mainly used for the fastened connection of special special connectors (built-in connectors, internal connectors), and is a commonly used and high-tech process in the CNC machining process of aluminum profiles.
3. Aluminum profile tapping
Aluminum profile tapping is what we often call tapping. The processing of aluminum profiles is to tap the end tapping holes of the aluminum profiles according to the technical requirements of the design drawings, which are used for the fastening connection of the later frame.
4: CNC milling machine
The traditional frame assembly of aluminum profiles does not require CNC milling, but in special cases, non-standard parts are used in conjunction with the profiles, and the aluminum profiles need to be CNC machined according to technical needs.
The process steps that require the use of cutting tools are:
Rough milling inner cavity: Rough milling the contour shape of the inner cavity of the mobile phone shell, and process the inner cavity and the positioning column combined with the fixture, which is very important for the subsequent processing links.
Milling the antenna slot: Metal aluminum can shield (attenuate) the radio frequency signal of the mobile phone, so it must be slotted so that the signal can have a path in and out. Therefore, milling the antenna slot is the most important and most difficult step. The antenna slot must be milled evenly, and the necessary connection points must be maintained to ensure the strength and integrity of the metal shell.
Fine milling camber: 3D shaping of the metal aluminum alloy body, usually milling the camber profile with a CNC machining center, which is also the most time-consuming process.
Fine milling side: The 3D arc surface of the metal body is milled out by CNC, but there is still a circle of redundancy on the edge, so the fine milling of the side is required, and then the prototype of the metal casing can be seen.
Polishing: High-speed and precise CNC machine tools are used, but only A1-A2 level finish can be achieved. In order to meet the needs of subsequent processing, it needs to be polished to A0 level finish, which can give a mirror effect.
Highlights: Corners are cut using a high-grade, ultra-high-speed CNC machine, a process also known as drilling or highlighting.
Fine-milling inner cavity: After the aluminum alloy is processed in multiple steps, the metal shell has been formed, and then the redundant materials such as the positioning column used for fixture locking are removed, so that the inside of the metal shell is completely clean.
Milling electric potential: The conductive effect of the aluminum alloy shell after anodization will become worse, so it is necessary to remove the local anodized film to expose the metal to obtain a good grounding effect, and it is necessary to go through the CNC treatment of milling the electric potential again.
Polishing: Polishing refers to the use of mechanical, chemical or electrochemical action to reduce the surface roughness of the workpiece to obtain a bright and smooth surface. The conventional polishing process is mechanical polishing and chemical polishing. High-speed precision CNC machine tools are used for mechanical polishing to eliminate knife lines and prepare for subsequent sandblasting.
Advantages and disadvantages of CNC machining
Reduce the number of tooling:
Reduce the number of tools, machining parts with complex shapes does not require complex tools. In order to change the shape and size of the part, it is only necessary to modify the processing program of the part, which is suitable for the development and transformation of new products.
Stable processing quality:
High machining accuracy and repeatability, meeting the requirements of aircraft machining.
Multi-variety, small batch:
Under the condition of small batch production, the production efficiency is high, and the production preparation can be reduced. Machine adjustment and process check time, cutting time is reduced by optimal stock removal.
Traditional machining methods are difficult to machine complex surfaces, and even some unobservable machined parts can be machined.
Aluminum alloy cnc processing can produce complex aluminum parts, and even produce machined parts. It can also produce a variety of varieties, with high production efficiency, saving labor costs, and can achieve a variety of mass production at the same time.
The disadvantage is that the processing equipment is relatively expensive, and the quality requirements for operators are relatively high.
Need more information?
Today’s cnc machining can automate almost any process. Raw materials can go into the machine, and finished parts can be packaged and ready to go. Manufacturers rely on a variety of CNC machines to manufacture a wide variety of products quickly, accurately, and cost-effectively. Elimold works with hundreds of customers in the medical, oil and gas, test and measurement, hydraulics, and aerospace industries, as well as many customers producing products for a variety of markets around the world.
If you still have questions about which products can be machined with our CNC machining services, please do not hesitate to contact us. Our team will be happy to review your part PDF file.