Tight Tolerance Military Parts CNC Machining

Tight Tolerance Military Parts CNC Machining

We always do the job to be a tangible team to ensure that we can present you with the very best good quality as well as the best cost for Special Design for High Precise Tight Tolerance Military Parts CNC Machining, As an experienced group we also accept custom-made orders. The main target of our corporation is always to develop a satisfying memory for all prospects, and set up a long-term win-win business enterprise partnership. Special Design for China CNC Machining Parts, CNC Turning Parts, Relying on superior quality and excellent post-sales, our items sell well in America, Europe, the Middle East and South Africa. We're also the appointed OEM factory for several worlds' famous merchandise brands. Welcome to contact us for further negotiation and cooperation.

1.Tight Tolerance Military Parts CNC Machining Services

With more than 10 years in the rapid manufacturing business, Shbury has built up rich experience in CNC machining parts for both prototyping and mass production.

we can achieve tight tolerances on CNC machined parts.

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4.Product Details forTight Tolerance Military Parts CNC Machining

How to get a tight tolerance military cnc parts ?

1. Find the right workplace

When looking for a workshop, you can’t focus only on the neighborhood; you also need to consider what floor you’ll be on. In our experience, the first floor (ground floor) is the only option. I have visited lots of CNC shops located on the second floor, third floor or even higher — usually because it is cheaper to rent. But the extra vibration on these levels can cause lots of problems. When the CNC machines are running, you can feel that vibration, and it is virtually impossible to make precision CNC parts in a trembling workshop.

2. Use quality CNC machines

Machine tolerance is one of the most important factors for ensuring part quality. If the machine tolerance is +/-0.02 mm, how can you guarantee +/-0.01 mm of tolerance? Although human knowhow plays a big role in making precision machined parts, it’s true that a workman is only as good as his tools, so we are always happy to invest in our machining centers. That being said, the most elaborate and versatile machining centers are not always the most accurate.

3. Balance tool holders

There are lots of tool holders available in the market, with prices ranging from 30 to 500 USD, and the dynamic balance of the tool holder is very important for accurate machining. Unbalance can be caused by misalignment, asymmetrical rotor design, concentricity errors and other factors, and it can lead to less accurate parts. In general, highly unbalanced tool holders should be balanced by using a professional balancing service, but some holders are designed for easy adjustment via the addition of weighted rings that can offset the unbalance. From our previous testing, a low-quality tool holder might cause 0.02 mm or more of jitter, while the maximum value of a good one is under 0.005 mm. We recommend using heat shrink tool holders from MST or Haimer.

4. Use (the correct) sharp cutting tools

The quality and sharpness of cutting tools plays a big role in achieving tight tolerances. Dull tools not only drain your machine of energy, they also prevent you from achieving accuracy and precision, since the dulled tip of the cutting tool has a larger radius than a sharp tip. Shallow cuts are also hard to achieve, since the blunt tool may not catch the surface of the workpiece during a pass, instead simply bouncing off. When machining materials with a low melting point, dull tools can also cause surface deformations due to heat buildup. We take care to maintain proper tool condition, and we also have expertise in tool selection: after all, you can’t achieve tight tolerances on fine features with a roughing end mill. 

5. Use good material suppliers

It’s easier to achieve a tight tolerance on a machinable material like an aluminum alloy, but different material suppliers can provide vastly different versions of the same grade of metal. Many suppliers provide certifications with their materials, showing that samples of the metal have passed a test proving their composition, but certifications only tell half the story. For instance, a bar of aluminum 6082 with a perfect ratio of silicon, magnesium and manganese may still produce horrible results if it has been subject to improper heat treatment. We’ve built up relationships with a reliable group of suppliers over time, but finding such suppliers naturally involves some trial and error.

6. Deploy an on-machine inspection system

Inspection of finished parts is an important part of quality control, but a better way to guarantee tight tolerances is to use an on-machine inspection system, consisting of a small probe that checks machining accuracy during a job. We use high-end Renishaw inspection systems on several of our CNC machines, and these inspection systems can accurately measure part dimensions during machining in addition to providing automatic offset correction.

7. Other considerations

Workshop operating system: Using a centralized machine shop management system means you won’t be rushing jobs, allowing you to machine with care and precision.

Experienced engineers: Experienced engineers know how to modify designs for simple and accurate machining that will produce better results. Experienced engineers know which is the best way to make a part as soon as they have CAD file and tolerance required. First of all, we decide how to hold the workpiece. (Read more about different ways of holding workpieces.) Then, we create the tool paths. An experienced engineer will consider both efficiency and tolerance. For example, some engineers may spend hours making a part, while someone could make the same part in an hour by optimizing the tool paths.

Well-trained operators: Skilled machine operators know how to select cutting tools, program machinery and carry out manual machining and lathing operations. They also know how to identify the quality of cutting tools and change the parameters if necessary. Just as importantly, a good operator knows how to protect the parts during and after machining.

A strong quality control department: Good quality control won’t automatically improve tolerances, but it will make sure that parts outside the acceptable tolerance are not sent to a customer by mistake.

Communication: Good communication with the customer and between staff leads to better results in the shop. It is important that the production department understands exactly what the customer needs — and communicates the actual possibilities back to the customer.

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