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CNC Milling

CNC Milling

Company Profile

 

 

Shenzhen Perfect Precision Products Co., Ltd was established in 2012 with a registered capital of 1 million. It established a foreign trade team in 2014, passed the IS09001 quality system certification. It was awarded the title of Guangdong Contract and Trustworthy Enterprise in 2018, and passed the certification of high-tech enterprise and intellectual property management system in 2019. In 2020, the office area has been expanded to 5000 square meters, the total number of employees has reached 70, and the digital chemical plant has been realized in 2021.

 

Why Choose Us

 

 

Our Factory
Shenzhen Perfect Precision Products Co., Ltd is a precision engineering manufacturer based in South China Shenzhen, specializing in the supply of high quality machined components in a variety of materials, utilizing the latest CNC turning, CNC milling, Multi-Spindle machining, sheet metal fabrication, injection molding, laser cutting, and stamping technology.
Our Certificate
ISO9001:2015,AS9100D,ISO13485:2016,ISO45001:2018,IATF16949:2016,ISO14001:2015,ROSH,CE etc.
Production Equipment
There are about 50-60 machines, most of which are imported from the United States and Japan, such as HAAS VF-2SS (5 axis) in the United States and TSUGAMI B0206 (6 axis) in Japan.

Our Service
Pre sales service: Customer sends drawings or expresses samples, informs salesman the required materials, surface treatment and order quantity. We can provide quote within 3 hours, 7 days for prototypes, support for OEM/ODM.

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What is CNC Milling

CNC milling is a manufacturing process that uses a cutting tool mounted on a rotating spindle to selectively remove material from a block of raw substrate. The workpiece is rigidly mounted to a table, and this table moves or rotates on different planes so the tool can work at many angles.
It is a computer-controlled process involving using a cutting tool to remove part of a workpiece. The basic setup involves placing the workpiece on the machine’s table while the cutting tool/s attached to the spindle rotates and moves to shape the workpiece into a finished product.
The rotation and movement of the cutting tool depend on the CNC milling machine type and level of sophistication. The process is highly versatile and compatible with various materials such as aluminum, plastics, wood, and glass.

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Benefits of CNC Milling

 

 

Precision
One of the biggest advantages of using CNC milling machines is that they can create parts exactly to specification. Because CNC mills rely on computer instructions to fabricate parts, they eliminate the possibility of human error common in manually operated machines. This means you can accurately create complex parts while achieving tolerances as tight as 0.004mm.

Fast and Efficient
Conventional milling machines often require an operator to manually change cutting tools depending on the cutting operation to be performed. Not only is this time-consuming, but it is also inefficient as end results are based on the operator’s judgment.
Wide Range of Material Options
CNC mills boast compatibility with a wide range of materials, including plastics, metals, and composites. So long as you’ve got blocks of the material, CNC mills will have no problem machining it.

Affordability
We can talk about precision, speed, and a ton of other advantages all day, but nothing beats affordability, especially for businesses looking to rely on third-party manufacturers. CNC milling is among the most affordable modern-day manufacturing processes. In fact, a CNC milled component would cost you less than a comparable 3D printed part.

 

 
Material Options for CNC Milling
 
01/

Metals
Metal components offer the highest level of precision and durability among all CNC-machined materials. Although they can be costly and susceptible to corrosion in humid environments, metal alloys can eliminate these flaws.

02/

Stainless Steel
Stainless steel is a popular choice for CNC milling due to its strength, corrosion resistance, and relative ease of machining. It is also available in various grades, including SS 303, SS 304, and SS 316. Some common applications of stainless steel include the fabrication of medical instruments, food processing equipment, automotive parts, and architectural components.

03/

Aluminum
Aluminum and its alloys are known for their high strength-to-weight ratios, which translates to lightweight components that can withstand stress. They are also easily machined and have relatively low material costs, resulting in cheaper bulk production runs. Furthermore, several alloys 2024, 5086, 6013, 6061, 6063, and 7075 are utilized for both consumer and industrial electronics, medical devices, aviation, and automotive components, to mention just a few.

04/

Brass
Despite its relatively high price, brass is a popular metal for CNC milling due to its excellent machinability, corrosion resistance, and aesthetic appeal. It also offers a smooth surface finish that can be easily polished for a superior look. Brasses can be grouped into three main categories, non-leaded 200 Series, leaded 300 Series, and Tin brass 400 Series.

05/

Titanium
Titanium is an extremely durable metal with a high level of hardness. It is resistant to corrosion and can endure very high heat levels while being relatively lightweight compared to other steels. It is common in the aerospace industry, sporting equipment, and other applications requiring high strength and durability. However, its very high cost limits its use to only those applications that require its very special properties.

06/

Plastics
Plastics can be used for CNC milling, but several types have different properties and may not be suitable for the intended application. For example, some plastics are easily machined and can yield high-quality finished parts. However, others may be more challenging to machine and produce lower-quality components.

 

Type of CNC Milling

 

Flange

 

01

Face Milling

In face milling, the cutting tool’s (face milling cutter) rotating axis is perpendicular to the workpiece surface.
The face milling cutter has a unique design notable in its interchangeable cutter inserts. It delivers cutting action using its multiple cutting teeth. As a result, face-milled parts have higher quality surface finishing.

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02

Plain Milling

Plain milling is a column and knee operation used for milling plain horizontal surfaces. The cutting tool lies parallel to the workpiece. Therefore, cutting occurs from one end of the workpiece to the other. Operators can feed the table longitudinally, cross, or vertically.

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03

Angular Milling

Angular milling involves milling flat surfaces using a cutting tool at an angle. The process is like plain milling, the only difference being the angular setup.
There are two angular milling cutters: single angle and double angle. The single-angle cutters have teeth on the cutter’s angular face and large flat sides and are suitable for working at angles of 450 or 600.

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04

Form Milling

Form milling is the better method for making irregular contours on a workpiece. The contour can be curved or curved with straight lines. The contours can be concave or convex and are made with teeth opposite such shapes. Consequently, to make a product with a concave edge, the form milling cutter should have a convex edge.

 

Applications of CNC Milling

 

Milling is highly accurate, precise, and with high tolerance. Hence it has a wide range of applications. Below are some of its industrial applications.

Aerospace
Computer numerical control milling is applicable in making many aeronautic components using materials such as Titanium and Aluminum. These materials are lightweight and durable. Due to the high need for accuracy and precision, the process is considered suitable.

Automotive
The automotive industry uses milling machining due to the requirement for efficiency without losing accuracy. Therefore, it is suitable for products made using the process include interior panels, cylinder heads, drive axles, suspension components, exhaust parts, and gearboxes.

Agriculture
CNC milling machining is suitable for making general purpose parts and components such as gears and shafts, nuts and bolts, and flanges. Furthermore, it is suitable for both large-scale and short-term production capabilities.

Medical
Medical parts such as prostheses require precise and unique design. Therefore, CNC milling is the better method for such parts. The design is retained, and there is productivity and efficiency.

What is the Difference Between CNC Milling and CNC Turning

The short answer is that milling rotates the cutting tool against a fixed workpiece fastened to a movable worktable. Milling typically uses square or rectangular bar stock to produce finished parts. On the other hand, the lathe rotates the workpiece against a single-point lathe tool, and round bars are its typical raw material.
Both processes are subtractive and produce metal chips, but they use different materials, methods, and tools to make parts and components. Milling and turning are appropriate for steel, cast iron, aluminum, steel, brass, and copper. And because these manufacturing techniques can generate heat, they often require cutting fluid or coolant.
How Does CNC Milling Work

Designing the CAD Files
The first phase involves creating a virtual representation of your intended product using CAD software. You can use different CAD-CAM programs to develop the needed G-code for machining. It is essential to translate the CAD design into a CNC programming language because that is what the machine will understand.
Setting Up the Milling Machine
Although the CNC milling machines automatically cut the workpieces, some aspects of the process require a machine operator.
Modern milling machines have live tooling capabilities. Therefore, they have the ability to change tools during the milling process. This reduces the number of stops that will occur during the operation. However, there’s still a need for initial setup and program checks before starting the process.

Producing the Components
As mentioned earlier, CNC milling uses a rotating tool(s) that cut off chips when it contacts the workpiece. Continuous rotation of the tool gives the desired shape. The process may comprise different operations depending on the type of raw material and desired shape of the final product.

 

Components of CNC Milling
Brass CNC Machined Superior Mechanical Services
Metal Spinning Part Service Fabrication
Stainless Steel Fabrication Laser Cutting
Spinning Parts OEM Metal Services

The machine contains several components with different functions to deliver the cutting action. Every CNC miller differs in the sophistication and design of these components. Nevertheless, their functions don't change. Below are the general components you will see in one

Frame
The frame is responsible for the stability and rigidity of the machine. It houses other components such as the base, detachable columns, and headstock (an important component that houses the spindle).
Spindle
The spindle is the entire rotating unit of the milling machine comprising the shaft that holds the cutting tools and other parts. It is either horizontal or vertical, depending on the milling machine. A motor rotates the spindle on the axis determined by the CNC controller.

Axes
The general axes are x (vertical), y(horizontal), and z(depth). However, other rotating axes are included based on some machines; A, B, and C.

Different machines can rotate along the axis depending on their sophistication. For example, 4-axis CNC milling machines can rotate on the A-axis while 5-axis can rotate on the A and C axes or B and C axes.

Columns
The columns rest on the base containing a coolant reservoir and a pump. Therefore, it functions as a support in the machine’s cooling during the cutting process. The column can be single. However, this depends on the machine's complexity.

CNC Control Panel
The CNC comprises a CNC monitor and programming buttons for entering data and codes. Therefore, it controls the milling process. As a result, it is the nervous system of the machine. `

Automatic Tool Changer (ATC)
The ATC functions in changing tools during the milling process. Therefore, it increases the speed, tool carrying capacity, and productivity of the machine.

 

How to Maintain CNC Milling

At any time when you encounter an unexpected situation, press the emergency stop button as soon as possible.
Check the level of the machine every 6 months to ensure that the level is controlled within 0.02 / 300.

When not in use for a long time, after turning on the machine, first return the machine to its original point, and then warm up the spindle for about 30 minutes.

The filter of the oil cooler should be cleaned in time, which can reduce the power consumption of the oil cooler and improve the cooling efficiency.

Before each machining stop, move the three axes to the middle position, and then power off to clean the machine.

Check the oil level of the spindle oil cooler every 2 months.

The water in the air of the air source filter should be drained in time.

Adjust the tool coolant valve to cool the cutting area of the tool with an appropriate flow.

Do not use a high-pressure air gun to clean up after processing. Use cutting water as much as possible.

When using water-soluble cutting fluid, adjust the water-oil ratio.

The tool setting instrument is a very precise measuring instrument. If the surface is not clean, it will affect the measurement accuracy. Therefore, it should be protected by a protective cover when it is not in use.

 

Our Factory
 

Shenzhen Perfect Precision Products Co., Ltd is a precision engineering manufacturer based in South China Shenzhen, specializing in the supply of high quality machined components in a variety of materials, utilizing the latest CNC turning, CNC milling, Multi-Spindle machining, sheet metal fabrication, injection molding, laser cutting, and stamping technology.

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productcate-1150-862
productcate-1150-862

 

FAQ
 

Q: What is CNC milling used for?

A: CNC milling machines are used to precisely and accurately cut metal and wood materials. However, the range of products and parts that can be cut with a CNC milling machine is almost limitless, as the machine can cut a vast array of shapes and angles.

Q: What is the difference between CNC cutting and milling?

A: Generally, CNC routers are designed to cut softer materials. However, softer materials can fall under a wide range – wood, plastic, and even softer metal, like aluminum. Meanwhile, milling machines are made to cut metal. Milling machines can cut any metal, from soft aluminum to hard titanium.

Q: Is CNC milling easy?

A: Summary. So as we've discussed, the CNC machining process can be challenging to master but it is certainly not out of your reach. You should expect it to take over 3 years of hard work to master but it can take just a few hours of easy tutorials to create basic parts.

Q: What are the basics of CNC milling?

A: The CNC Milling process involves multi-point cutting tools controlled by a computerised programme that reads and translates machine paths. These machine paths originate from CAD/CAM software (Computer-Aided Design/Manufacture) programmes used to create a computerised design of the product.

Q: What are the disadvantages of CNC milling?

A: However, CNC milling also has some drawbacks, such as the high initial investment and maintenance costs, the need for skilled operators and programmers, the risk of errors and breakdowns due to software or hardware issues, and the potential waste of material and energy.

Q: What are the risks of CNC milling?

A: Milling and CNC machines cut away material using rotating blades, which can throw or eject dust and chips at high speed. ➢ Flying chips present an eye injury hazard. ➢ Fine dust can be a respiratory hazard. ➢ Mills can also be very loud, which can impact hearing as well as drown out voices and alarms.

Q: Can a CNC mill cut steel?

A: CNC machines can indeed cut metal and are widely used due to their high precision and accuracy. Depending on the material in question and its strength and hardness, CNC machining will yield different results and finishes.

Q: What is the life expectancy of a CNC milling machine?

A: The lifespan of a CNC machine depends in large part on the type of machine. For instance, a complex CNC lathe may have a service life of about 20 years, while a basic CNC milling machine may be of service for about 10 to 15 years.

Q: Which is better CNC lathe or CNC milling?

A: Conclusion. While CNC Milling machines offer a wider range of tools for cutting and shaping, CNC Lathes are ideal for cylindrical objects. Make sure that you assess your production needs and choose one accordingly.

Q: What is the difference between CNC milling and CNC cutting?

A: One of the most prominent differences between CNC routers and mills is the material they can cut. CNC routers can cut softer materials like wood, plastic, foam and non-ferrous metals like aluminum. They are less rigid than CNC mills, so they cannot transfer enough force to cut through harder materials.

Q: Is CNC milling fast?

A: If you are looking to create fast and repeated highly complex and intricate parts (from 1 to 10,000+ parts), CNC milling is an excellent choice. HLH's CNC milling services can deliver custom machined parts, in both metal and plastic, four to five times faster than it takes using more traditional machining methods.

Q: What does CNC milling make?

A: CNC milling machines can cut a large variety of materials such as aluminum, bronze, copper, ceramics, plywood, various types of steel, stone, wood, zinc, and other engineering materials. This makes it ideal for creating prototypes for product development.

Q: How accurate is CNC milling?

A: In general the accuracy of CNC milling machines are between 0.01 mm to 0.03 mm. The tolerance of the machine repeatability is the measure of how close the machine can reproduce a part. The typical range for CNC machine repeatability is 0.003 mm to .

Q: What is the best CNC mill to start with?

A: The SYIL X5 is undoubtedly one of the best small CNC machines for beginners. It offers a perfect balance of compact size and affordable price. Its small footprint makes it ideal for those with limited space, while its budget-friendly cost makes it accessible to hobbyists and small businesses.

Q: Can a CNC mill replace a lathe?

A: Regardless if it's the modern shop or production floor, a CNC Mill and a CNC Lathe are practically interchangeable due to advancements in Artificial Intelligence (AI), computer applications, tool technology, and machine functionality.

Q: How much does CNC milling cost?

A: The costs for CNC milling services can vary based on factors such as the complexity of the part, the type of material used, the time taken for machining, and the level of precision required.

Q: What engineering sector uses CNC milling the most?

A: The automotive industry relies on CNC machining to manufacture various parts, from engine blocks to transmission components, brake discs, and suspension parts. CNC machines enable the automotive industry to produce intricate designs and tolerances that are crucial for the performance and safety of their products.

Q: Which is better CNC lathe or CNC milling?

A: Conclusion. While CNC Milling machines offer a wider range of tools for cutting and shaping, CNC Lathes are ideal for cylindrical objects. Make sure that you assess your production needs and choose one accordingly.

We're professional cnc milling manufacturers and suppliers in China, specialized in providing high quality customized products. We warmly welcome you to buy cnc milling for sale here from our factory. For quotation, contact us now.

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