Features of CNC Milling Machine
- Digital control and automated operation enhance machining precision and repeatability.
- Delivers outstanding efficiency for high-volume production.
- Enables the machining of components with complex geometries.
- TSINFA holds European CE certification and ISO 9001:2015 quality management system accreditation.
- TSINFA provides comprehensive technical support to customers in over 100 countries worldwide.
Types of CNC Milling Machines
A vertical CNC milling machine has a spindle perpendicular to the table. It has a simpler structure, resulting in a lower initial cost and easier maintenance. Vertical CNC milling machines are smaller and more flexible, and are often used for machining small parts. This structure makes it easier to operate and reduces programming steps. If you’re looking for the right milling machine for small businesses and new projects, it’s a good fit.
Horizontal CNC milling machines are the opposite of vertical CNC milling machines in that it has a spindle that is parallel to the table. This makes it a smoother cutting tool with a deeper depth of cut. So you can machine bigger and heavier parts with it. You can move its spindle vertically and move the bed parallel. In addition, a horizontal CNC milling machine is better able to evacuate chips during machining, achieving a superior surface finish and improving machining efficiency.
In addition to horizontal and vertical milling machines, CNC milling machines add different axes to meet more machining needs. The most common of these are three-axis CNC mills that include an X-axis for side-to-side movement, a Y-axis for forward and backward movement, and a Z-axis for up and down movement. In order to efficiently process more complex shapes, 4- and 5-axis CNC mills add two additional rotary axes (usually the A and B axes).
What is the CNC Milling Machine？
A CNC milling machine is a fully automated machine tool for processing material by computer-controlled subtractive moulding. It can be used to process a wide range of materials such as metal, wood, and plastics. Thanks to its full automation and excellent machining quality, it allows for consistent and efficient production. You can use it in a variety of industries such as aerospace, automotive, electronics, and more.
Advantages of CNC Milling Machines
Reduced Manual Dependence
A CNC milling machine uses a computer to control the entire machining process without the need for manual labour. Therefore, it requires less labour costs and you only need to hire professional programmers. This reduces errors caused by manual machining and improves production quality. Automation also reduces the cycle time for machining individual components, thus increasing productivity.
Superior Machining Accuracy
Firstly, CNC milling machines use highly advanced computers to control the production process in order to accurately execute instructions. It is also highly intelligent and capable of fine interpolation, real-time error correction, and temperature control during machining. Secondly, the CNC milling machine is made from robust materials such as cast iron, making it better able to resist vibration and thermal expansion during manufacturing and preventing tool path deflection for superior machining accuracy. In addition, it minimises the interference of manual factors.
High Efficiency
On the one hand, the automated operation and continuous running of the CNC milling machine shorten the production time of individual parts and increase the production efficiency. Secondly, the excellent machining quality of CNC milling machines can further reduce scrap and defective products. If you are producing large quantities, it can greatly reduce the time and cost of rework, thus increasing productivity.
Repeatability
CNC milling machines are ideal for high-volume production. You can ensure consistent product specifications (including quality, size, etc.) within the same batch by simply executing the same instructions in production, resulting in consistency and repeatability.
Wide Range of Applicability
The CNC system can meet the requirements of various complex designs and supports a wide range of processes such as face milling, flat milling, and angle milling. It can also process a wide range of materials. You can use it to machine different metals (e.g., aluminium, steel, copper), different plastics (e.g., polycarbonate, polyethylene, acrylic, etc.), and various woods (e.g., oak, walnut, etc.).
How Does a CNC Milling Machine Work?
Design and Modelling
Before you start production, you need to finalise the design of the part (including information such as size and shape) with your customer. Since CNC milling cannot be modified during production, returning the part will cost additional time and money. Therefore, you need to iterate with the customer to determine the final requirements. Ask the designer to create a CAD model with all the information about the part to facilitate the next step in production.
Converting to G-code
It is recommended that you hire an experienced programming professional. After obtaining the final CAD model, the programmer needs to translate the geometric and process parameters of the part model into recognisable instructions for the CNC milling machine. These codes can be generated with the help of CAM software, which simulates cutting tool paths and parameters for you. The programmer can continuously optimise the simulation to minimise errors.
Perform Machining
The workpiece is fixed to the machine’s chuck to ensure stability and prevent vibration and deformation during machining. The operator also needs to select the right tool for the material and the machining process and fix it to the tool holder. You can also equip your CNC milling machine with an automatic tool changer to quickly switch between the tools needed to machine the same part. Once you have ensured that there are no errors, you can run the command to start machining. The workpiece rotates at high speed and is shaped by the cutting tool.
Post-Processing
CNC milling machines produce parts with an excellent surface finish, which saves a lot of finishing time. You can more easily apply various surface treatments (e.g. polishing, electroplating, sandblasting, etc.) to the workpiece to meet your individual requirements. After machining, you should carry out strict quality checks to ensure the reliability of your products.
Applications of CNC Milling Machines
Aerospace
Aerospace components such as turbine blades, guidance systems, and engine parts for aircraft require extremely high dimensional accuracy to ensure safe and stable flight. CNC milling machines can meet their extremely high tolerance requirements, resulting in high aerospace durability. In addition, you can machine lightweight materials such as plastics, aluminium, and titanium on CNC milling machines to create lighter-weight components for improved fuel efficiency.
Medical Industry
The medical industry uses CNC milling machines to manufacture products with complex shapes, such as surgical instruments, implants and prosthetics. You can customise the machining according to the patient’s needs. It not only meets high precision requirements, but also ensures a good surface finish and thus patient safety.
Automotive Industry
CNC milling machines can mass-produce most of the parts in automobiles, such as fuel system components, transmission components, etc. It can increase your productivity while ensuring consistent quality and car performance.
Electronics
A CNC milling machine is an excellent solution for machining tiny parts. It can be used for a variety of electronic devices such as mobile phones, computers and other electronic devices to machine multiple parts such as electronic device housings, sensor housings, heat sinks, camera modules and more.
Consumer Goods
You can also use a CNC milling machine to machine parts for a variety of consumer products such as appliances and furniture. It’s ideal for high-volume production with excellent productivity and consistency while maintaining production quality.
CNC milling removes material from a stationary workpiece by rotating the tool, whereas CNC turning has a stationary tool that rotates through the workpiece during machining. Therefore CNC turning is commonly used to machine cylindrical materials, and CNC milling allows for more complex shapes to be machined.
The automatic tool changer is used to automatically switch the tool required for the current machining task during the machining process. It reduces manual operation and downtime and greatly improves productivity.
You need to consider the material of the workpiece, its size, the required production accuracy, and the production volume to make your choice. In addition to this, budget and maintenance costs should also be taken into consideration.
Need. A CNC milling machine generates heat during operation, and a cooling system can cool it down quickly to ensure the best performance of the CNC milling machine. And temperature control also prevents components from thermal deformation, thermal expansion and other defects.
