Notes

Selection of machining materials for cnc parts

1. Determine the requirements required for the function of the part
2. Identify common materials used to machine parts
3. Consider the related secondary processing

Prioritize your parts requirements

1. Environment: For many people, this is definitely the most important requirement. Environmental factors may include heat and cold resistance, flame resistance, or ultraviolet and chemical resistance.

Depending on the application, your material may have to be food grade or medical grade. Consider the full range of part applications. For example, parts of medical equipment may have to withstand the extreme heat of an autoclave or harsh chemical sterilization between uses.

2. Electrical: This can cover a range of application-related factors. Some parts may need to be conductive or insulated. It may need to dissipate static electricity. In either case, choosing the right metal or plastic resin is crucial.

3. Mechanical: There are many forms of strength. Parts may need to fall anywhere on the continuum from rigid to flexible. It may require tensile strength or compressive strength, or be able to resist impact. It may have to resist wear or provide lubricity to function as a bearing. There are materials that meet these requirements, and some materials are more effective than others.

4. Size: Although machining can produce parts of various sizes, the size of the parts may be limited by the maximum available size of the specific stock material.

5. Cost: Cost can be an important factor, and usually falls behind essentials and good things.


Identify commonly used processing materials

Over the years, our engineers have identified selected materials suitable for the processing process, and these materials have always been a popular choice for our customers.

For metals, these include aluminum, brass, copper, stainless steel, and steel. Among plastics, designers often choose polyether ether ketone (PEEK), ABS, acetal, nylon, polycarbonate, polyvinyl chloride (PVC), high and low density polyethylene, etc. Protolabs offers more than 40 different grades of plastic and metal materials. Some important characteristics of the most popular processing materials include:

ABS and acetal

1. ABS has high impact strength, low thermal conductivity and low friction coefficient.

2. Acetal has high mechanical strength, good dimensional stability and low moisture absorption.

PEEK and Ultem

1. PEEK has high wear resistance, low moisture absorption and low friction coefficient.

2. Ultem (PEI) has extremely high strength, rigidity, chemical resistance and high dielectric strength.


Aluminum 6061 and 7075

1.6061 has excellent processability, low cost and versatility.

2.7075 has high strength, hardness, low weight and heat resistance.


Finishing options and process selection

In addition to material selection, related secondary processing also needs to be considered. For example, if the selected material is one of the available aluminum alloys (6061 and 7075), there are several available related surface treatments that need to be considered. Anodizing is more suitable for durability. VMT is mainly engaged in the production and manufacture of non-standard precision hardware parts. It has been deeply involved in the industry for many years and has rich experience. If you have CNC machining, CNC lathe machining, five-axis machining service needs including aluminum, copper, stainless steel, iron, titanium alloy, plastics and other products, please contact vmt, we will provide you with a low-cost, high-quality integration solution.

https://www.machining-custom.com/



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