Accuracy, Precision, & Tolerance of CNC Machining
There are certain technical terms that we use, however, do not know their exact meaning, or why are they used. Consider CNC machining. There are so many technical terms associated with the specifications and capabilities of the CNC machining. Do you know the meaning of each and every term? Probably yes, probably not, right? While buying CNC machining service from a service provider, you must have heard or read some terms like accuracy, tolerance, precision, and so on. What do these terms denote? Are you interested in knowing the significance of these technical terms used in CNC machining? If yes, then please read the following post, as it will give you a clear idea of the three terms &#; accuracy, precision, and tolerance.
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1. What is Accuracy in Machining?
To explain this concept in easy terms, accuracy refers to the difference between the actual measurement and measurement from your system. If the difference between the two is extremely less, then the accuracy of that measurement is said to be high. It is also referred to as the degree of conformity. Let&#;s consider an example to make it a bit easier to understand. You go to a CNC machining service provider and they say that the CNC machine tools they have are highly accurate. This means that if their tools are programmed for cutting a metal piece, which is 50 mm in length, then the tool will cut the piece exactly. If the tool is really accurate as the service provider says, then it will get closer to 50 mm, without any errors.
2. What Do You Mean by Precision?
This is another most important term that is used in CNC machining. Also, this term defines the reliability of a machine tool. Basically, precision is a measure, which defines the capability of a measurement system to return the same measure again and again. You can call it repeatability of the measurement system. Therefore, if you are looking forward to getting a reliable information, which you can use for your further calculations, then you have to ensure good repeatability of the system. Besides this, it is very important for a measurement system to be both accurate, as well as precise.
3. What Does Tolerance Mean in Machining?
Last, but also the important &#; tolerance. The term tolerance can be defined as the allowable or predictable deviation of the measurement system from the known or standard value. The tolerance of any system is usually expressed as &#;+/-&#;. Let us consider an example, to explain this concept clearly. Consider a CNC machining tool has a tolerance of +/- 0.01 mm. This means that the machining tool can introduce a deviation of 0.01 mm in every cut. This deviation can be either 0.01 mm extra than the standard value, or less than 0.01 mm by the standard value.
We hope you got an understanding of the terms &#; accuracy, precision, and tolerance used in CNC machining. This understanding of terms will make you more confident while having a word with any machining service providers in the US. It will also help you to understand all the important specifications and capabilities, and compare them with your requirements, thus allowing you to take the decision of buying the services or not.
What is Precision CNC Milling?
At Ardel Engineering, we specialize in precision CNC machining services. As suggested by the name, precision computer numerical control (CNC) machining relies on the use of specialized computer software (e.g., CAD/CAM) and computer-controlled equipment to produce highly accurate and precise parts and products from various materials. It is an umbrella term encompassing a variety of subtractive manufacturing processes. One of our core service offerings is CNC milling.
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A Guide to CNC Milling
While most CNC milling applies to metalwork, the tools are extremely versatile and produce custom, precision parts for a wide variety of industries.
From aluminum, brass, and steel, to exotic and precious metals such as gold, iridium, and platinum, precision CNC machining can craft even the most sophisticated designs in the most particular metals.
What is Computer Numerical Control, or CNC?
Computer Numerical Control (CNC) allows a machine to be moved and monitored by computer control. The family of CNC machines is vast &#; milling machines, welders, grinders, lathes, routers, cutters, stamping machines, and many types of large industrial systems rely on CNC technology for precise, custom production of components.
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Particular software codes, such as NC code and G-code or ISO code, work from CAM (Computer Aided Machining) and CAD (Computer Aided Design) software packages to drive CNC machines to create three dimensional parts directly from engineers&#; digital designs.
CNC Milling Machines
The most widely used variety of CNC machine, CNC milling tools perform a machining process much like both drilling and cutting. At its most basic, milling uses rotary cutters to remove the necessary excess material from a workpiece as it is fed into the milling tool. It&#;s a popular industrial solution due to the detailed sizes and shapes that milling can accommodate.
The rotating cylindrical cutter in a CNC milling machine can move along multiple axes to create unique shapes, slots, holes, and details in a part. Most machines operate on three to five axes, allowing the most advanced tools to perform sophisticated machining with extremely complex geometries. In fact, today&#;s most intricate CNC projects would be practically impossible to produce with manual tooling.
Modern CNC milling machines are assembled as both horizontal and vertical machining centers, and can create precision components from plastics, ceramics, and composite materials, in addition to metals. They come equipped with technical features such as automatic tool changers, tool carousels and magazines, coolant systems, and enclosures.
Industries and Products
CNC milling has the ability to hold very tight geometric tolerances for many aspects of a part&#;s key features, such as diameter, true position, profile, and flatness.
With increasingly affordable tooling costs and the ability to create a wide range of complex parts, CNC milling is a popular solution for projects ranging from prototypes to full-scale fabrication of unique precision components.
CNC milling centers serve industries such as:
- Aircrafts and aerospace
- Prototypes and custom designs
- Commercial
- Maintenance
- Electronics
- Medical, both disposable and non-implantable
- Recreation
- Technology and security
- Telecommunications
- Transportation and automotive
- Industrial and O.E.M.
Mounting brackets, fixtures, precision components, housings and assemblies, struts, and structural components are all common products crafted with custom CNC machining.
For more information on CNC milling and the benefits of using this technology for your next project, visit one of our pages below:
Contact us to discuss your requirements of medical device prototyping. Our experienced sales team can help you identify the options that best suit your needs.
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