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Get 5 tips for CNC machining services in China
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Get 5 tips for CNC machining services in China

Views: 203     Author: Wendy     Publish Time: 2023-06-09      Origin: Site Inquire

Get 5 tips for CNC machining services in China

1.Determine the tolerance and select the appropriate material

The aim of machining is to produce an item that is as near to flawless as is practical. This calls for the machine's ability to operate with subpar materials and tolerances.

It can be impacted by the material you employ in two different ways:

To begin with, the kind of material you pick for your component might affect how much force is required to cut through it. For sections that are experiencing higher strain or stress, think about using a tougher material, such as steel or aluminum (they are often stronger than softer metals). For instance, aluminum will be more durable than steel and less prone to have issues from high heat brought on by friction if you're creating a bearing or an axle. Because they are only as strong as the weakest component of their construction, bearings, like other metal parts, require extreme precision.

Again, you'll need to specify the quality and performance standards you're searching for when it comes to the material needs. Occasionally, CNC machining can result in items with subpar surface finishes (often referred to as "hollowness") that are less than desirable. Additionally, there can be other issues like glazing or cracking that would have a detrimental effect on functionality or aesthetics. These flaws don't necessarily indicate that your CNC machining product won't operate well, but if they aren't addressed properly now, they might become problematic later.

Second, tolerance establishes the level of precision required for your part. For instance, the accuracy of an injection-molded plastic item may only need to be a few thousandths of a millimeter. Since a millimeter is such a tiny measurement, it must be accurate to within a few hundredths of a millimeter. The component could leak, break, or deform in some other manner if the tolerance criteria aren't met, rendering it useless.

Tolerances for items can also be specified in microns (abbreviated "") during CNC machining and injection molding. This is suitable for situations where the part's size is smaller than the material itself and measures 1/1000th of a millimeter (1 micron). Although it is possible to acquire components created from materials with various tolerances, such as one material having tighter tolerances than another, doing so is unusual and takes more work than using only one material with tight tolerances.

Once you've chosen your suppliers, be sure to provide them a clear understanding of what you need them to deliver. If you don't define the tolerances required by your process and materials, you're setting yourself up for disappointment and maybe costly returns if your specs call for more than you can realistically expect from a manufacturer in another country.

2.Verify the design complies with machining specifications

It is crucial to confirm that the design complies with the machining process' criteria before beginning the project. If you are not careful now, you could have to make expensive modifications later on in the project.

Here are some warning signs to watch out for:

Make sure there aren't any jagged edges or radii that are 0.8 mm or smaller. These will be challenging to machine and may cause the component to develop burrs or even breaks.

Avoid pockets with narrow radii and very deep depths because they might be challenging to machine and reach for deburring.

Avoid having features or holes with a diameter of less than 1 mm or less than 2 mm. These are very challenging, if not impossible, to machine without damaging the tools and creating burrs that must be manually removed at a significant expense.

3.Make a decision about the usage of surface treatment and heat treatment

Only after the component has been machined do you apply the surface treatment. It serves to shield the component's surface from corrosion and wear. In rare circumstances, it can also be utilized to enhance the finish's look. The most popular surface treatments include phosphating, anodizing, and transparent coatings. For surfaces that need protection and transparency, such stainless steel or aluminum, clear coatings are placed following heat treatment. For non-plated metals like titanium or chrome-molybdenum steel (CMS), anodizing is used following heat treatment. Phosphating is used to unplated metals like copper, brass, and bronze following heat treatment.

Additionally, heat treating your part is crucial. Heat treatment (annealing) alters the properties of the metal, making it considerably easier to machine, particularly in confined spaces and around pointed features.

4. Examine the supplier cost breakdown

The price of using CNC machining services to produce components in China frequently varies based on the suppliers. Therefore, it's crucial to compare prices from various vendors in order to estimate how much you may save by having your items made in China.

To compare pricing, get estimates from different providers and check into their cost breakdowns. In addition to production costs, you should take into account other expenses like shipping and logistics charges to determine if they are or are not included in the price provided.

5. Assess the current state of suppliers

We'll provide you some advice on how to find the best Chinese CNC machining service provider in the following paragraphs:

Analyze the suppliers' current status.

You need to further assess a supplier's actual position and ability to provide the needed parts on schedule in addition to considering their size and strength. Take a look at the supplier's production workshop and equipment conditions, as well as their inventory level and product selection, to see whether they use a professional and standardized production management approach. Verify that they have the staff and resources necessary to accomplish your orders; CNC machining is a labor-intensive process that needs a lot of both. You might ask them to further display their processing skills if necessary.

Check references for the provider.

An essential factor in determining whether or not a provider is reliable is the supplier's references. You may ask a Chinese CNC machining service provider for information about their clients, then speak with these clients about the caliber of their work and other facets of their experiences working together. If at all feasible, you should also pay these clients a visit to gain their first-hand opinions on your supplier's performance.