Manufacturing parts with complex geometrical shapes can increase setup time, production complexity and costs without the right type of CNC machines. You must choose a machine that can handle turning, milling and drilling on multiple surfaces, without repeatedly doing several setups.
In this guide, we will explore critical aspects of the 9-axis CNC machine which combines advanced turning and multi-axis machining capabilities
What is a 9-axis CNC Machine?
The term “9-axis CNC” refers to a class of multi-axis machine configurations does not refer to a specific machine but, a universal axis arrangement. Under normal circumstances, the CNC machine configuration will combine turning 5-axis milling capabilities with a second spindle and additional turret. In most cases, the exact axis configuration varies by the manufacturer and CNC machine types.
9-Axis vs. 5-axis vs. 3-axis CNC at a Glance
For many machinists, the dilemma is when to choose 9-axis, 5-axis or 3-axis CNC machines. We will make that decision easier by comparing these muti-axis CNC machines side by side.
| Feature | 3-axis CNC | 5-axis CNC | 9-axis CNC |
| Basic motion | · X, Y, Z | · Linear and rotary axes | · Multiple coordinated linear and rotary axes |
| Typical operations | · Basic milling | · Complex multi-angle milling | · Turning, milling, and multi-sided machining |
| Setup requirements | · Multiple for complex parts | · Fewer | · Often minimized |
| Machining part complexity | · Low to moderate | · High | · Very high |
How 9-axis CNC Machine Works
A 9-axis CNC machining center operates by cordinating its motion across three distinct axis groups that work together to deliver complete, single-setup machining on highly complex components.
9-Axis CNC Machine Configuration
Primary Linear Axes
Recently, the three primary linear axes perform all essential movements of the cutting tool during machining.
· X-axis
This provides for horizontal movement of the cutting tool or table from left to right; it determines the lateral position of all cutting operations performed throughout the width of the workpiece.
· Y-axis
The Y-Axis is responsible for forward and back motion of the cutting tool or table, determining the depth position to reach all features of the workpiece front to back.
· Z-axis
This is the vertical motion up and down, determining the depth of cut as well as the position along the axis for each operation on the component.
Rotary Axes
The three axes tilt and rotate the tool or item, thus allowing for complicated angular positioning that is not possible with only the 3 linear axes.
· A-axis
The A-axis rotates about the X-axis, enabling the tool or cutter head to tilt so that you can reach its angled surfaces for machining.
· B-axis
This axis revolves about the Y-axis. It enables you to fabricate the inclined surfaces of a component through tilting of the spindle head or the raw material.
· C-axis
The C-axis, on the other hand, is responsible for rotating the part about the Z-axis to particular angles.
This facilitates multi-faced milling, off-center drilling, and live tooling along the entire circumference of the component.
Additional Axes
The following are types of axes that increase machine functionality from 5-axis milling to turning and multi-tasking machining operations in a single setup.
· Secondary Spindle Axes
To begin with, the sub-spindle grabs the component directly from the main spindle without any manual component manipulation.
Along those lines, it holds the transferred component to perform tooling of the rest of the rear surface at once or serially.
· Additional Tool or Turret Movements
Here, the turret is equipped with several live tool holders that rotate independently to position the mill, drill, and tap tools at the right angle and depth.
Machining Operation in 9-Axis CNC Machine
Turning
If you have operated this machine, I’m sure you have seen that during turning, the main spindle spins the component at very high speed.
Whereas single-point tools remove material along a programmed path from the workpiece.
Milling
Next, the live tool spindles cut the material on the stationary part or even spinning workpieces for slots, pockets, contoured surfaces, and angle cuts without any need for fixture changes.
Drilling and Tapping
Even more important, the operation of live tools such as drilling, reaming, and tapping in the turret at predetermined locations on any surface of the portion, staying in its first clamping.
Simultaneous or Coordinated Machining
You can perform simultaneous machining operations on both the main and sub-spindles due to the two-spindle design.
Advantages of 9-axis CNC Machines
· Fewer Workpiece Setups
What makes this truly useful is its integration of multi-axis tooling.
They minimize part setups by up to 70% compared to conventional 5-axis machining, reducing errors and the overall time to produce complex shapes that require numerous setups on different machines.
· Shorter Production Cycles
One major benefit of working in tandem, two spindles along with various turret stations is that what used to be done serially over several days is cut into a single continuous manufacturing cycle.
Unlike 5-axis CNC machinery, 9-axis CNC cuts layout time by 97%, hence faster delivery and higher on-time performance for quick turnaround.
When a project involves complex surfaces or multiple machining angles, professional 5-axis CNC machining services can reduce repositioning and improve dimensional consistency.
· Higher Machining Accuracy
Another strong point is that there are no inherent repositioning errors; thanks to a 9-axis CNC machine, the component remains in place from start to finish.
Each time a component changes hands between machines, errors increase with subsequent machining operations, thus minimizing overall machining precision on complex components.
· Greater Production Efficiency
The distinct advantage of this machine is its ability to perform milling operations with two heads that run across the X, Y, Z, A, B, and C axes.
It allows for twice as much production and decreased manufacturing time for items that were previously made using two different machines, one for turning and one for milling.
According to factory owners, 9-axis machining centers have indicated higher machine efficiency and cost-effectiveness than normal multi-machine operations.
· Complex Part Machining
Today, in the most challenging industries, 9-axis machining is making a difference.
They are important from aerospace and defense to the fabrication of blisks for jet engines, highly complex structures, and guidance systems housing that need turning and complex 5-axis machining.
In addition, the medical industry is benefiting from the features of a 9-axis CNC machine in making orthopedic implants with complex organic contours.
· Reduced Need for Secondary Operations
When you are dealing with secondary operations such as deburring, polishing, and inspection, you require considerable labor and floor time.
This is because the parts received are from multiple machining operations that produce variable surface finishes on different machined surfaces.
9-axis CNC machining allows for consistent surface finish and quality in all surfaces without secondary operations.
Parts Suitable for 9-axis CNC Machining
Did you know that medical components like knee and hip joint replacements made from materials with natural surface contours are examples of 9-axis machine parts?
They also make complicated surgical devices machined from hard metals such as titanium and stainless steel.
Other items that benefit from 9-axis CNC machining technology include: structural aerospace blades and impellers for jet engines, turbine shafts, intricate hydraulic valves, gearbox parts, and defense missile guidance tools.
FAQs
What type of controller is required for 9-axis CNC machining?
A nine-axis CNC machine requires a highly sophisticated multi-axis CNC controller to coordinate the movement of all active axes and spindles together.
The controller synchronizes the axes movements and matches the spindle speeds while transferring the work from the main spindle to the sub-spindle.
What CAD/CAM software supports 9-axis CNC machining?
Sophisticated CAD/CAM systems support 9-axis CNC tooling with multi-task machining modules which coordinate tool paths for milling, turning, and drilling processes simultaneously.
How difficult is it to program a 9-axis CNC machine?
If you are planning to purchase a 9-axis CNC machining center, you must invest in trained programmers to synchronize axes, avoid tool collisions, and perform spindle transfers.
What is the difference between a 9-axis CNC machine and a CNC mill-turn center?
A 9-axis CNC machine combines full five-axis milling operations with a second spindle and turret axes for complete one-stop operation.
A typical CNC mill-turn center, on the other hand, has fewer coordinated axes and thus lacks the full 5-axis milling capacity.
How does a 9-axis CNC machine reduce setup errors on complex components?
A 9-axis CNC machine works by holding the workpiece at the same point throughout the manufacturing process, avoiding repositioning errors each time a part moves between machines.
This single positioning is what makes it able to tolerate intricate aerospace parts within a range of 0.0003 inches.
Does higher axis count improve CNC machining performance?
Not really. An increase in the number of axes improves efficiency only when the part geometry requires multi-axis motion.
Always maintain proportional efficiency when fabricating simple parts to avoid incurring more expenses.
What are the programming challenges when coordinating multiple axes and spindles?
First, the main problem is to synchronize the main spindle and the sub-spindle when transferring parts.
Other issues are tool interference with simultaneous operations from different turrets, collision-free tool paths in common workspaces, and complete machine simulation before actual cutting of expensive raw material.
Final Thoughts
Ultimately, choose the right machine that can produce parts in one go without setup issues, fast lead times, or complicated parts manufacturing.
If you are a machine shop owner or a procurement officer looking to invest in your next CNC, the answer couldn’t be simpler: it’s worth it.
For all your precision manufacturing, TSINFA offers a range of CNC machines customized to your unique needs – Talk to our experts now.
