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The 7 axis CNC machine offers one extra rotational axis compared to traditional CNC machines. This allows it to mill parts from different angles without needing further adjustments. Here's a breakdown of some 7-axis CNC machines available for business buyers.
CNC Routers with A, B, C, and 7th Axes
Usually, CNC routers have three axes: X, Y, and Z. However, the addition of A, B, C, and a 7th axis creates more room for creativity. These machines make artwork, furniture, and signboards with superb detail. Clients get to choose from products with either a fixed C axis or a C continuous axis. The models also have a standard CNC router with a 7th axis that consists of a movable track on the base or a stationary table.
7-Axis CNC Mill
These machines are great for working on complex parts like molds or making holes in various materials. They are better than other CNC milling machines with only six axes. This is basically due to the addition of the 7th axis that reduces the need for fixtures and increases accuracy. As a result, production levels and efficiency are better.
CNC Lathes with a 7th Axis
Lathes with X, Y, Z, and 7th 7th axes make it easy to turn workpieces and do operations like facing, grooving, thread cutting, drilling, and knurling. They boost productivity and precision, offering a great alternative to standard CNC lathes. Custom models may come with 7th rotary axes that have a 360-degree rotation continuous capability.
Two main specification aspects when purchasing a 7 axis CNC are the axis capabilities and the machine's structural capacity.
Axis capabilities
7-axis CNC machines have seven movable parts or ''axes'' that can be operated, each of which can make different configurations or pathways. Unlike CNC machines with fewer axes, the 7-axis CNC can create more complicated forms or cutouts with enhanced precision. The specific 7-axis capabilities will also depend on the model and whether it is a router, mill, or lathe. Generally, though, products will have seven axes to work with.
Machine structural capacity
This specification usually looks at the beams and other structural components where the 7-axis CNC machines are assembled. One way to think about this is the maximal dimensions and weight of the object that can be processed. For example, the machine must have enough space and strength to handle heavier, larger, and even more complex material like this. There are different ways of testing a machine's structural capacity, such as the stiffness, strength, carrying capacity, etc. It usually divides into a small desktop and huge industrial versions for commercial purposes.
Maintenance is crucial, as it will ensure the 7-axis CNC machine performs with better accuracy. This means it will always work as it should and have a longer lifespan.
Regular Inspection
Users should regularly inspect the entire 7-axis CNC. This includes looking at the moving parts, rail system, transmission components, spindle, and cutting tools. Also, promptly discovering any potential issues is essential, such as abnormal wear or unusual noises. Also, any issues found should be fixed right away.
Lubrication
Lubricating the moving parts of the 7-axis CNC is crucial. Select a suitable lubricant for the rail and lead screws. The moving parts shall work smoothly, reducing any friction and, thus, the wear.
Cleaning
A cleaning routine is essential to keep the 7-axis CNC machine in top condition. This means removing any debris left after cutting or milling. Dust from the material will also be harmful if not removed promptly. A vacuum or compressed air method will work to remove the waste.
Software Updates
The hardware and software that run the 7-axis CNC machines are essential elements to consider when doing maintenance. Users must ensure that the machine's firmware is updated. This helps to improve performance and enhance cutting accuracy. In addition, any bugs discovered will be fixed through timely software updates.
Due to their unique capabilities, 7-axis CNC machines are used in various industries, including aerospace, robotics, manufacturing, furniture, and medical.
Aerospace components
The CNC machine with 7 axes is a preferred choice for machining complex and intricate parts and components in the aerospace industry, such as blisks, ducts, frames, and structures, as well as lightweight components. These are usually made of titanium, carbon fiber, and other exotic materials. Its high accuracy also ensures that the critical tolerances and quality requirements are met.
Robotics
7-axis CNC routers are widely used for robot machining and manufacturing robot arms with 7 degrees of freedom. Assembling these KUKA robots, for instance, requires 7 rotating joints that offer more flexibility and mobility than a typical 6-axis robot.
Automotive and Heavy Equipment
7-axis CNC milling machines are preferred for accurately machining different types of automotive engine blocks, cylinder heads, crankshafts, transmission cases, and mast pipelines for ships. In addition, they are also used to manufacture parts for electric and hybrid vehicles, such as battery housings and cooling components.
Medical Applications
In the medical field, 7-axis CNC machines have the potential to be utilized for the production of patient-specific implants as well as prosthetics, along with surgical instruments and devices that are customized. To enhance precision, speed, and efficiency in medical interventions, these machines can be integrated with advanced software and artificial intelligence.
Architectural and Interior Design
These machines can be employed in creating unique architectural elements such as facades, canopies, skylights, and other expressive buildings. They also help in designing customized interior elements like furniture, lighting fixtures, and decorative pieces that require complex geometries.
Agriculture and Food
In the agriculture and food industry, they can help automate the process of planting, harvesting, and monitoring crops. Also, these machines can be utilized to produce personalized food products, packaging, and labeling.
When it comes to purchasing 7 axis CNC machines for sale, there are a few things that need to be considered to ensure an option that is ideal for a particular application. Beyond the obvious parameters of build volume and materials compatible with the machine, customers will need to consider the software compatibility, as well as the bidding crucial features that impact workflow and final product quality.
Q1. What is the difference between 7-axis CNC machines and 5-axis CNC machines?
A1. The primary difference between 7-axis CNC machines and 5-axis CNC machines lies in the freedom of movement and the complexity of the shapes they can cut. While 5-axis machines have five directional movements — the X, Y, Z, and two rotational axes (often referred to as A and B) — a 7-axis CNC machine adds two more rotational axes. These additional axes enable the 7-axis machines to offer greater flexibility in machining intricate details and complex geometries involving undercuts and continuous curved paths. Furthermore, 7-axis CNC machines may accommodate larger workpieces than 5-axis machines.
Q2. What are the benefits of 7-axis CNC machines?
A2. 7-axis CNC machines provide several advantages for various industries. The most prominent are increased production efficiency and saving time and labor costs. These machines perform multiple tasks, such as routing, drilling, tapping, machining, engraving, milled, and managing workpieces. Furthermore, they can automate processes like nested-based machining, which enhances efficiency and streamlining workflows. Additionally, 7-axis CNC machines help reduce the need for manual intervention. This capacity lowers labor costs and enhances workplace safety by minimizing the risks associated with manual machining and machining errors.
Q3. Can a beginner operate a 7-axis CNC machine?
A3. Even though 7-axis CNC machines are user-friendly, operating them still needs some prior knowledge and training. Those who have a little CNC experience may easily start with a 3D CNC router and later move on to more advanced machines with additional axes. It is strongly recommended that first-time users learn about the machine's structure and functions and seek guidance from experienced operators before attempting to operate the machine independently. This way, they can ensure their safety and protect the equipment.
Q4. What CAD is used for 7-axis CNC machines?
A4. Generally speaking, any CAD software that can create a 3D model of the object to be machine parts is applicable for use with 7-axis CNC machines. Popular choices include Autodesk Fusion, Inventor, SolidWorks, and Rhino. These programs allow users to create complex models and then export them to the machine's control software. Some CNC routers come with their specific control software, like the Vectric software in the case of Vectric CNC routers. This kind of software usually has a user-friendly interface, and its functions are easy and intuitive to learn. But they are mostly suitable for beginners. To take full advantage of a 7-axis CNC machine's capabilities, access its control system, and understand how to work with any additional necessary software, users need to be familiar with other CAD programs.
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