CNC precision machining is a subtractive manufacturing process that involves the use of computer numerical control (CNC) to create precise parts. The CNC process starts with a 3D design of the part that is created by an engineer or designer. This design will be used as a blueprint for the machine to read this blueprint and then it will use various tools like lasers, drills, turning, lathe, or milling machines to cut shapes into the material to create high precision machined parts, it has been used in various industries for decades and it is now being used more frequently due to the rise in technology.
Table of Contents for This Article
1. What is precision machining and CNC machining
CNC machining is a type of automated manufacturing process that uses computers to control milling and turning operations. It employs an industrial robot arm to hold and move the cutting tool, which is typically in the form of an end mill, drill bit, router bit, or rotary table.
What is CNC precision technology?
CNC precision technology is an automated production process that can be used for any number of applications. The technology has been around for decades and has become more advanced with the use of new technologies like 3D printing. It helps in providing more accurate and consistent products, which are required by the various industry standards such as aerospace, medical, automotive.
Precision machining is a process of manufacturing that involves the use of a machine tool to cut metal or other materials into a desired shape withi high precision. The workpiece may be stationary or moving, and it is usually fed into the machine using some type of tooling. Precision machining can be done by hand or with the help of machines, which means “precisionma chining including cnc machining”.
2. Why are CNC machines more accurate?
CNC machines are more accurate than traditional machining because they use a computer-aided manufacturing software to control the machines and generate the cutting paths. The software can also be used for monitoring and analyzing the performance of the machine tools at any given point in time.
CNC machines are also more accurate than traditional machining because they have built-in geometric features that ensure accuracy.
This is achieved by using a coordinate system, which provides a reference point for all of the CNC machine’s movements, and an indexing system, which allows for repeatable positioning of parts on the CNC machine table.
CNC machines are used in industries such as aerospace, automotive, and shipbuilding. CNC machines are becoming more accurate due to the introduction of new technologies.
New technologies such as 3D printing and laser cutting have contributed to the accuracy of CNC machines. With these new technologies, it is possible to create parts with more precise dimensions than ever before.
Precision CNC machining services
Precision CNC machining services are a type of outsourcing service that is becoming more popular in recent years. This is because there are many companies that need precision CNC machining services but don’t have the resources to provide them in-house.
Precision CNC machining are used for a wide range of purposes, including cutting out shapes from metal or plastic, drilling holes, and milling out parts. CNC machines can be programmed to do these types of tasks with extreme precision and accuracy so they are often used in the manufacturing industry.
Precision CNC machining services are a great way to get your parts done precisely and efficiently. In order to ensure that the precision cnc machining service is done correctly, it’s important for companies to find an experienced provider of machining manufacturer.
Machining is a process that can be very time-consuming and expensive, but with precision CNC machining services, you can get the precision you need without all the hassle. Precision CNC machining service providers use machines that are capable of cutting metal quickly, accurately and precisely.
If you want to know more about precision CNC machining services, then contact us today via sending email to: project@3qmachining.com!
1. How accurate can CNC machine be?
The accuracy of CNC machining is dependent on the type of machine, the material being used, and the skill of the operator “cnc machinist”. For example, when machining metal, CNC machines are more accurate than when they are used to cut wood or plastic; 5 axis cnc machines are more accurate than 2 axis cnc machines because they have an extra axis for measuring and controlling the position.
The precision is typically specified in terms of surface roughness or surface finish, which is usually expressed as a number followed by a unit (e.g., .0002”).
The accuracy is typically specified in terms of how close to a given dimension a part can be cut. For example, if a part has an allowed tolerance for +0.001” and -0.002”, then it can be cut to dimensions that are between 0.000-0.002” and 0.001-0.003”
In general, when cutting out small pieces of aluminum with cnc machine, the most accuracy of tolerance range will be around 0.002mm; For larger pieces, the tolerance range is around 0.05mm.
Table 1: Linear Tolerances in CNC Machining
Dimension Range (mm) | Fine (F) +/- | Medium (M) +/- | Coarse (C) +/- | Very Coarse (V) +/- |
.5-3 | .05 | .1 | .2 | — |
3-6 | .05 | .1 | .3 | .5 |
6-30 | .1 | .2 | .5 | 1.0 |
30-120 | .15 | .3 | .8 | 1.5 |
120-400 | .2 | .5 | 1.2 | 2.5 |
400-1000 | .3 | .8 | 2.0 | 4.0 |
1000-2000 | .5 | 1.2 | 3.0 | 6.0 |
2000-4000 | — | 2.0 | 4.0 | 8.0 |
Table 2: Angle Tolerances in CNC Machining
Dimension Range (mm) | Fine (F) +/- | Medium (M) +/- | Coarse (C) +/- | Very Coarse (V) +/- |
0-10 | 1o | 1o | 1o 30’ | 3o |
10-50 | 0 o 30’ | 0 o 30’ | 1o | 2o |
50-120 | 0 o 20’ | 0 o 20’ | 0 o 30’ | 1o |
120-400 | 0 o 10’ | 0 o 10’ | 0 o 15’ | 0 o 30’ |
400 | 0 o 5’ | 0 o 5’ | 0 o 10’ | 0 o 20’ |
Table 3: Radius and Chamfer Tolerances in CNC Machining
Dimension Range (mm) | Fine (F) +/- | Medium (M) +/- | Coarse (C) +/- | Very Coarse (V) +/- |
.5-3 | .2 | .2 | .4 | .4 |
3-6 | .5 | .5 | 1 | 1 |
6 | 1 | 1 | 2 | 2 |
Sources: https://www.thomasnet.com/articles/custom-manufacturing-fabricating/understanding-cnc-machining/
2. How to calculate CNC machining cost and How much cost of it ?
The cost of CNC machining is calculated by multiplying the number of hours needed to machine a part by the hourly rate for the machine.
In order to calculate the cost of a part, you need to know three things: The hourly rate for your specific machine, the material costs, how many hours it takes to produce a custom machined part,
The cost of a CNC machining machine is usually based on the features and functions it offers. The cost of a CNC machining machine per hour is calculated using the total price of the machine, divided by the number of hours it can run.
The hourly rate for a CNC machining machine is calculated by dividing the total price by number of hours it can run. For example, if you have an hourly rate of $100/hour and you want to buy a used 5-axis milling machine that has an average lifespan of 10 years with an average.
More details for cost of different types cnc machine, and cost of different material, you can read the article “what’s custom cnc machining service and how much it cost” or send email to: project@3qmachining.com to get more information or technique support for your custom machining projects.
