CNC Machining Copper Alloy
What is copper alloy?
Copper alloy is an alloy made by mixing copper with other metals (such as zinc, aluminum, tin, nickel, lead, etc.) and non-metals (such as phosphorus, boron, silicon, etc.). Copper alloys have excellent electrical conductivity, thermal conductivity, strength, corrosion resistance, malleability and solderability, so they are widely used in the manufacture of electrical equipment, ships, aerospace vehicles, automobiles, construction and other fields. Copper alloys are also used in the manufacture of coins, decorative items, musical instruments and other items.
Commonly used copper alloys for CNC machining
| Copper Alloy Materials | Chemical composition | Characteristics | Applications |
| Brass-H59 | Copper 59%, Zinc 40%, Nickel 1% | Corrosion resistant, moldable, easy to process | Manufacture of purple copper alloys, corrosion-resistant pipes and fittings, connectors, electrical parts, etc. |
| Brass-H62 | Copper 62%, zinc 37%, nickel 1% | Harder, corrosion resistant, easy to process | Manufacture of copper alloys, copper tubes, electronic components, watch parts, etc. |
| Purple Copper-T2 | Copper 99.9% | Good electrical and thermal conductivity | Manufacture of cables, wires, transformers, generators and other electrical equipment |
| Oxygen-free copper TU2 | Copper 99.95%, phosphorus 0.001% | High strength, good plasticity, good electrical conductivity | Manufacture of electrical equipment, electrolytic tanks, automotive brake pipes and fittings, etc. |
| Tin bronze – QSn-6-6-3 | Copper 87%, tin 6%, nickel 6%, other 1% | Good wear resistance, corrosion resistance | Manufacture of bearings, gears, rails, turbines, ship parts, etc. |
| Beryllium copper-C17200 | Copper 98%, beryllium 2%-2.5% | High strength, wear resistance, good corrosion resistance | Manufacture of springs, electronic contactors, aerospace parts, fasteners, etc. |
CNC machining characteristics of copper alloys?
The CNC machining characteristics of copper alloys are as follows.
Good machinability: Copper alloys have high plasticity and machinability, so they are easy to machine during CNC machining and can obtain parts with high precision and high surface quality.
Low cutting force: The cutting force of copper alloy is lower than other metals, so it can reduce tool wear and machine load, and extend tool life.
Easy heat treatment: Copper alloys have good heat treatment properties and can be heat treated to obtain the required hardness, strength and wear resistance.
Easy chip formation: Copper alloys are easy to form chips when cutting, so proper cutting parameters and machining methods are needed to avoid chip accumulation and stuck tools.
Prone to deformation and thermal cracking: Copper alloys have a low melting point and thermal conductivity, so they are prone to deformation and thermal cracking during machining. To avoid this, machining temperatures need to be controlled and proper cooling measures taken.
What are the benefits of CNC machining of copper alloys?
Copper alloy CNC machining has the following benefits.
High precision: Copper alloys have good machinability and heat treatment properties, so high precision parts can be obtained through CNC machining, reducing human error and improving machining accuracy.
High efficiency: CNC machining can automatically complete the processing of parts without manual intervention, which can save time and labor costs and improve processing efficiency.
Flexibility: CNC machining can be quickly adjusted and modified according to different part requirements and customer needs, improving the flexibility and adaptability of processing.
Cost saving: CNC machining can reduce machining scrap and tool wear, reduce unnecessary energy consumption and production costs, and improve machining efficiency.
Repeatability: CNC machining ensures that each part is machined with the same quality and accuracy, avoiding machining variations due to differences in operator skills and experience.
CNC machining of copper alloy parts applied to the industry?
CNC machined copper alloy parts are widely used in a number of industries, including but not limited to the following areas.
Electronics industry: copper alloy parts are commonly used in electronic products, such as cell phones, tablet PCs, TVs, stereos and other internal components in electronic devices.
Machinery manufacturing industry: copper alloy parts can be used in the manufacture of various mechanical equipment, such as ships, automobiles, aircraft, trains, etc.
Aerospace industry: copper alloy materials are suitable for the manufacture of parts for aerospace equipment such as aircraft, spacecraft and satellites because of their high strength, rigidity and corrosion resistance.
Medical industry: Copper alloy parts can be used in the manufacture of medical equipment and medical devices, such as surgical instruments, hospital beds, electronic blood pressure monitors, etc.
Construction industry: Copper alloy materials can be used in the manufacture of metal doors, windows, railings and other parts in construction projects, as well as in the manufacture of household products such as floor heaters.
Copper alloy CNC machining of common problems and solutions?
Common problems in the CNC machining of copper alloys include the following.
Burrs or burrs on the surface of the part: This may be due to tool wear or cutting speed is too fast. The solution is to replace the tool or slow down the cutting speed.
Part surface blemishes or dents: This can be caused by excessive tool wear or uneven cutting forces during machining. The solution is to replace the tool or increase the flow of cutting fluid.
Tool breaks easily: This may be caused by excessive tool wear, inappropriate machining parameters or too hard material. The solution is to replace the tool, adjust the machining parameters or change to a more suitable material.
Excessive machine vibration: This can be caused by unbalanced machine tools, unstable tools or unsuitable machining parameters. The solution is to recalibrate the machine, replace the tool with a more stable one or adjust the machining parameters.
Insufficient machining accuracy: This may be caused by tool wear, unstable machine tools, or inappropriate machining parameters. The solution is to replace the tool, recalibrate the machine, or adjust the machining parameters.
Solutions to these problems usually include replacing tools, recalibrating the machine, adjusting machining parameters or changing to a more suitable material. In addition, regular machine maintenance and servicing are important measures to prevent problems from occurring.
