Dental CAD CAM Milling Machine Zirconia Dental 5 axis cnc milling machine

 

Dental CAD CAM Milling Machine Zirconia Dental 5 axis cnc milling machine is a high-precision dental equipment that combines 5-axis milling technology with CAD/CAM design systems. Dental CAD CAM Milling Machine Zirconia Dental 5 axis cnc milling machine supports precision machining of various materials such as zirconia, pmma, wax, peek, etc., providing efficient and accurate restoration solutions. Complex shapes can be machined, and the system automatically generates optimized machining paths, so that each restoration has extremely high precision.

 

 

Model	C5
Axis	5
Milling mode	Dry
Product type	Crown/coping,Bridge,
Max spindle speed	60000 RPM/min
Spindle power	650w
Spindle cooling	Air cooling
Rotation range	Aaxis: 360°Baxis：+25°-115°
Number of tool housed	14
Compatible compressed air	＞6pa(No oil and no water)
Loadable workpiece shape	Disk diameter: 98mm
Input Voltage	max.850W,50-60Hz,220ACV
External dimensions	468*600*660mm
Weight	90kg
Control command set	NC code
Accuracy	0.01mm

 

 

1.Enhanced Detail and Complexity: The 5-axis capability allows for intricate designs and complex dental restorations
2.Versatility: Able to work with different materials, providing flexibility in the types of restorations that can be produced.
3.Efficiency: Reduces the time required for milling and increases overall productivity in a dental lab setting.

4.in addition to,there are：

Detailed explanation of working principle
(1) Conversion from digital design to physical processing
Data input: Obtain 3D data of the patient's teeth (such as STL format) through an intraoral scanner or model scanner, and transfer it to the CAD software for restoration design.

Path planning: The CAM software converts the restoration 3D model into a processing path (G code), defining the tool's motion trajectory, cutting depth, feed speed and other parameters.

Five-axis linkage control: The CNC system synchronously controls the X/Y/Z linear axis and A/C rotary axis of the machine tool, allowing the tool to tilt or rotate to any angle to process complex curved surfaces (such as crown occlusal surface and adjacent surface).

(2) Geometric principle of five-axis machining
Tool tilt and avoidance: Adjust the tool angle through the rotary axis (A/C axis) to avoid interference between the tool and the workpiece or fixture, such as processing deep cavities or concave structures.

Continuous processing: Five-axis linkage can realize normal cutting of the tool along the curved surface, reduce the step effect of layered milling, and improve surface finish.

(3) Real-time feedback and compensation
Closed-loop control system: Real-time monitoring of tool and workpiece positions through grating rulers or encoders, comparison of theoretical paths with actual positions, and dynamic compensation of errors.

Thermal deformation control: Some equipment has built-in temperature sensors to automatically adjust the cooling system or processing parameters to reduce the impact of thermal deformation on machine tool accuracy.

 

 

 

 

 

 

 

Precautions for milling materials
(1) Zirconia material properties and processing requirements
Pre-sintered and fully sintered states:

Pre-sintered zirconia (soft state): low hardness, easy to cut, but a shrinkage margin (about 20-25%) must be reserved, and high-temperature sintering is required to reach final strength after processing.

Fully sintered zirconia (hard state): directly processed into finished products, but extremely wear-prone to the tool, only suitable for minimal finishing.

Dust control: Zirconia powder is biologically inert, but long-term inhalation may be harmful to health, and an efficient dust collection device must be equipped.

(2) Tool selection and management
Tool types: diamond-coated tools (suitable for pre-sintered zirconia), polycrystalline diamond (PCD) tools (suitable for high-hardness materials).

Wear monitoring: Regularly check tool edge wear to avoid rough machining surfaces or material edge collapse due to blunt tools.

Cutting parameter optimization: Adjust the rotation speed (e.g. pre-sintered zirconia: 6000-60,000 RPM) and feed speed according to the material state to prevent material overheating or tool breakage.

(3) Cooling and lubrication
Dry cutting: Zirconia processing usually adopts dry cutting to avoid coolant contamination of materials or affecting subsequent sintering.

Air cooling system: Some equipment uses compressed air to cool the tool and remove chips to prevent dust accumulation.

(4) Material fixing and clamping
Special fixture design: Zirconia blocks need to be fixed by vacuum suction cups or customized fixtures to avoid displacement caused by vibration during processing.

Pretreatment of blanks: Ensure that the surface of zirconia blocks is flat to avoid processing errors caused by uneven clamping.

3. Equipment calibration and accuracy verification
Dynamic accuracy test: Use standard test pieces (such as ballbars) to detect the accuracy of five-axis linkage to ensure the positioning accuracy under ISO 10791 standard (usually ≤5μm).

Tool length compensation: Regularly calibrate tool length and radius to prevent processing size deviation due to installation errors.

Rotation axis center point calibration: Use probes or lasers to calibrate the A/C axis rotation center to ensure the accuracy of multi-axis coordinated motion.

4. Environment and operation requirements
Temperature and humidity control: The recommended working environment temperature is 20-25°C and the humidity is 40-60% to prevent the thermal expansion and contraction of the metal parts of the machine tool or the moisture absorption of the zirconia blank.

Power supply stability: A stabilized power supply is required to prevent voltage fluctuations from affecting the performance of the CNC system or spindle motor.

Vibration-proof foundation: The machine tool should be installed on a vibration-proof foundation or vibration isolation platform to reduce the impact of external vibration on processing accuracy.

5. Software and hardware compatibility
Open and closed systems:

Open system: supports third-party CAD/CAM software (such as 3Shape, exocad) with high flexibility.

Closed system: only compatible with the manufacturer's own software, with high optimization but limited scalability.

Post-processor customization: CAM software needs to match the five-axis motion logic of a specific machine tool to avoid code conflicts and processing errors.

6. Industry standards and regulations
Medical device certification: The equipment must comply with ISO 13485 (Quality Management System for Medical Devices) and FDA (USA) or CE (EU) certification.

Material compatibility certification: Ensure that the processed zirconia restoration meets the biocompatibility requirements of ISO 13356 (zirconia for surgical implants).

Waste disposal: Zirconia dust after cutting must be handled in accordance with medical waste or industrial dust specifications.

7. Typical cases and failure modes
Common causes of processing failure:

Insecure material clamping leads to displacement;

Tool wear is not replaced in time;

CAM path planning errors (such as failure to consider tool radius compensation);

Uncalibrated machine tools lead to asynchrony between axes.

Emergency treatment: Equipped with a quick tool change system, spare fixtures, and CAM software path simulation function (anti-collision detection).

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