CNC Turning PEEK

CNC turning characteristics of PEEK

The following are some of the characteristics of PEEK in CNC turning:

High Temperature Stability: PEEK has excellent high temperature stability and maintains good mechanical properties and dimensional stability in high temperature environments. This makes PEEK suitable for machining parts that need to operate under high temperature conditions.

Low coefficient of friction: The low coefficient of friction on the surface of PEEK gives it good self-lubricating properties, making it suitable for parts with high friction requirements.

Good corrosion resistance: PEEK has good corrosion resistance to many chemicals, which allows it to be used in environments where chemical resistance is required.

High Mechanical Properties: PEEK has high strength and stiffness, making it an ideal material for many high performance parts.

Low Density: Despite its high mechanical properties, PEEK has a relatively low density, making it the material of choice for machining parts that require lightweighting.

Benefits of PEEK CNC turning

Here are some of the main benefits of PEEK CNC turning:

High-temperature performance: PEEK has excellent high-temperature stability, and can maintain good mechanical properties and dimensional stability in high-temperature environments. Therefore, it is suitable for machining parts that need to work under high temperature conditions.

Low coefficient of friction: The low coefficient of friction on the surface of PEEK gives it good self-lubricating properties, which is conducive to reducing friction and wear between parts.

Good corrosion resistance: PEEK has good corrosion resistance to many chemicals, allowing it to be used in environments that require chemical resistance.

High Mechanical Properties: PEEK has high strength and stiffness, making it an ideal material for many high performance parts. Its mechanical properties are close to those of metal, but with a lower density, which contributes to lighter weight designs.

Low Density: PEEK’s relatively low density helps reduce the weight of parts for applications requiring lightweighting.

Good insulating properties: PEEK is an excellent insulating material for electronic and electrical applications requiring insulating properties.

Fatigue resistance: PEEK materials have good fatigue resistance, making them suitable for applications that require long periods of stable operation.

Ease of machining: Although PEEK is a high-performance engineering plastic, it is relatively easy to CNC turn and can be efficiently machined on CNC lathes.

Malleability: PEEK is relatively malleable, making it easy to machine complex shapes and structures.

Industries where CNC turning of PEEK parts is applied

The following are some of the major industries where CNC turned PEEK parts are used:

Aerospace industry: In the aerospace field, PEEK is widely used in the manufacture of parts with high temperature and corrosion resistance requirements, such as engine parts, seals, sensors, connectors and so on.

Medical Device Manufacturing: In the field of medical device manufacturing, PEEK is used in the manufacture of implantable devices, surgical instruments, orthopedic stents, artificial joints, and so on. Its biocompatibility and corrosion resistance make it an ideal material for medical devices.

Automotive Manufacturing: PEEK is used in the automotive industry to manufacture engine parts, hydraulic system parts, brake parts, and other high-performance and high-temperature requirements.

Electronics and Semiconductor Manufacturing: PEEK is used in the electronics and semiconductor fields to manufacture connectors, sockets, packaging materials, etc.

Oil and gas industry: PEEK is used in the manufacture of corrosion-resistant, high-temperature and high-pressure oil and gas equipment parts, such as valve seats, seals and so on.

General Machinery Manufacturing: PEEK is widely used in the field of general machinery, such as the manufacture of bearings, gears, seals and so on.

Power industry: In the power industry, PEEK is used in the manufacture of high-temperature electrical insulation parts, cable insulation materials.

Textile machinery manufacturing industry: PEEK is used in textile machinery to manufacture wear-resistant, high-temperature-resistant parts, such as spindle, thread guide tube.

PEEK CNC turning common problems and solutions

Here are some common problems and their solutions:

Tool wear or broken tool: Since PEEK is a high-performance engineering plastic, it may cause greater wear on the tool or even lead to tool breakage. Solutions include using tools with better wear resistance and adjusting cutting parameters to avoid excessive cutting forces.

Poor surface quality: The machining surface of PEEK is prone to burrs, scratches and other problems, affecting the processing quality. The solution includes choosing the right tool, optimizing the cutting speed and feed rate, and carrying out appropriate surface treatment.

Cutting temperature is too high: PEEK’s thermal conductivity is low, easy to produce high temperatures during processing, affecting the cutting performance and machining quality. Solutions include using coolant to cool the tool and workpiece, controlling the cutting speed and feed rate, and avoiding excessive heating.

Machining vibration and resonance: due to the high rigidity of PEEK, the machining process is prone to vibration and resonance problems. Solutions include increasing the rigidity of the machine tool support, adjusting cutting parameters, selecting the appropriate tool, etc..

Excessive cutting force: The high strength of PEEK makes it generate large cutting force on cutting tools. The solution includes optimizing the cutting path, selecting suitable tools and cutting parameters, and reducing the cutting force.

Machining accuracy problems: Due to the high coefficient of thermal expansion of PEEK, dimensional deviations may occur during machining. The solution includes controlling the machining temperature, making appropriate compensation, and calibrating the machine tool.

Chip handling problems: PEEK chips are easily adhered to the tool and workpiece, and improper handling may cause problems such as tool jamming. The solution includes choosing appropriate chip handling equipment and methods.

Programming errors: Since the machining characteristics of PEEK are different from those of metal, errors may occur during programming. The solution includes a deep understanding of the characteristics of PEEK and reasonable programming and adjustment.

CNC turning commonly used plastics are as follows:

CNC turning ABS
CNC turning Bakelite
CNC turning FR4
CNC turning nylon
CNC turning PE
CNC turning POM
CNC turning PP
CNC turning PPS
CNC turning PTFE
CNC turning PVC
CNC turning carbon fiber