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CNC Machining

CNC Machining

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

 

 

Precision Machining
Customized high precision parts, Tolerance: +/-0.01 mm, Special area: +/-0.005 mm.
Our Certificate
ISO9001:2015,AS9100D,ISO13485:2016,ISO45001:2018,IATF16949:2016,ISO14001:2015,ROSH,CE etc.
Production Equipment
Our production equipment includes: 3-axis, 4-axis, 5-axis, 6-axis. Our processing range includes turning, milling, drilling, grinding, EDM and other processing methods.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
 OEM/ODM

1-Piece minimum order

3-H quotation

Samples: 1-3 Days

Lead time: 7-14 Days

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What is CNC Machining

CNC machining has become an integral part of various industries, as it offers precision, efficiency, and versatility when it comes to manufacturing custom parts and components. This manufacturing process has evolved from the numerical control (NC) machining process, which used punched tape cards to control machinery. CNC stands for Computer Numerical Control and refers to the automated control of machining tools, such as drills, lathes, mills, grinders, routers, and 3D printers, using a computer.

High-precision Machining

 

Benefits of CNC Machining
 
Zero defects and greater accuracy

Since precision turning machines operate autonomously and without any manual intervention, they bypass the possibility of human errors seeping into the manufacturing process, leading to defects. With codes and software programs governing the end-to-end process, the machines can deliver greater accuracy without any flaws.

Faster and efficient production

When working with milling machines, one can operate these on their fastest settings to match increased demands. Plus, as stated earlier, these machines can run 24 hours a day and seven days a week without tiring, without breaks, and without any trade-offs.

Reduction in energy consumption

Industries such as oil and natural gas, petrochemicals, aerospace, automotive, etc., are already known to be energy-intensive due to the losses involved. However, the introduction of CNC machines can allow them to remain scalable and precise without usurping limited resources such as energy and labor any further than what is necessary.

CNC machining leads to lower production costs

With the above advantages in mind, it is only intuitive to glean that the use of CNC machines for the precision turning of components can massively bring down the cost of production. For a start, it improves the efficiency and scalability of production and assembly without contributing to material waste.similarly, it reduces energy consumption and saves these recurring operational costs. At the same time, it also offloads any financial liability triggered by accidents and incidents.

 

Type of CNC Machining

 

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01

Lathes

CNC lathes are machines that rotate a workpiece around a stationary cutting tool, enabling precise and efficient shaping of the material. They are primarily used for turning operations and can accommodate a range of materials, including metal, plastic, and wood. The CNC Lathe Machine manages and transfers material programmatically to the computer, allowing for a high degree of precision and customization.

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02

Grinders

CNC grinders use a rotating abrasive wheel to shape and finish workpieces through accurate, high-precision grinding. These machines are particularly well-suited for creating precision components with tight tolerances, such as cutting tools, automotive parts, and aerospace components. With various types of grinders available, manufacturers can select the ideal machine for specific grinding applications.

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03

Plasma Cutters

CNC plasma cutters use a high-velocity jet of ionized gas to cut through electrically conductive materials. These machines provide accurate, efficient cutting, especially for thick materials like steel or aluminum. Plasma cutters are often used in industrial settings, like shipbuilding and manufacturing, due to their ability to produce large, intricate shapes with minimal waste.

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04

Laser Cutters

Laser cutters use a focused laser beam to slice through materials with precision and accuracy. They are ideal for cutting thin materials such as sheet metal, plastic, or wood, and can produce intricate shapes with minimal kerf (the width of the cut). CNC laser cutters are used in various industries, from electronics to automotive manufacturing, thanks to their ability to produce highly detailed designs.

 

What are the Materials Used in CNC Machining

 

 

Metal
Meal is easily the most commonly used material in CNC machining. CNC machines can cut almost any type of metal from free-machining brass to nickel superalloys like Inconel. Metal machining covers a range of applications from injection molds to shafts and gears.

Plastic
While the vast majority of plastic parts are manufactured using injection molding, CNC machining may be used to produce certain plastic components. Typical materials can include ABS (acrylonitrile butadiene styrene), nylon, and polycarbonate. Plastic machining applications can include valve bodies, bushings, and injection molding prototypes to check the overall function of the part before investing in expensive molding tools.

Wood
CNC routers are most often used to cut wood and are generally cheaper than standard metal cutting CNC machines. CNC machining of wood is most commonly done for decorative purposes. Common applications include furniture, window frames, and ornamental panels.

Foam
Polyurethane foam (either closed or open-cell) is commonly used in CNC machining applications. Foam blocks can be cut into snug packaging for high-value products using a CNC router. One example is the foam used in toolboxes to keep the tools secure during transport.

Composites
CNC machines are regularly used when processing composite parts. Composites can include anything from aramid to fiberglass to carbon fiber. These materials are extremely abrasive to cutting tools. Aerospace and marine composite components are machined to add fastener holes and for general trimming after the molding process.

 

Application of CNC Machining
 
Woodworking Industries

Wooden furniture is often CNC machined to save time and reduce cost. Manually carving wooden parts is extremely time-consuming and costly. CNC machines can be used to create furniture with complex geometries that would have otherwise required a master woodworker to achieve.

Lettering and Engraving Systems

Some applications don’t require the heavy-duty removal of material, but rather make use of an engraving tool to mark patterns or text onto the surface of a part. This application can be done for artistic applications or serialized parts.

Electrical Industry

Demand for CNC-machined parts for the electronics industry covers a wide spectrum of applications. Machining component mounting holes into printed circuit boards and machining aluminum or copper heat sink for heat-generating electrical components are some examples of the use of CNC machining in the electronics industry. Get started on a new Small Batch CNC Machining Quote.

Pharmaceutical Industry

CNC machines are used to manufacture precise equipment for use in the production of pharmaceutical products. Applications can include extremely precise metering pumps, ingredient-dispensing nozzles, and packaging. Get started on a new Production CNC Machining Quote.

Food and Beverage Industry

The fast-moving consumer goods industry makes use of a wide range of custom material-handling machinery that makes use of CNC machined parts. Food packaging is also made from injection molded plastics whose molds are CNC machined.

 

What is the CNC Machining Process
 

Designing the CAD Model
A CAD (Computer Aided Design) 3D model is developed by an engineer or designer. This part is designed according to specific CNC design principles, which are included in the overall DFM (Design for Manufacturing) philosophy. DFM ensures that the part can be efficiently manufactured on a CNC machine. For CNC parts, it is not strictly necessary to create 2D drawings of the part, since the machine instructions are created using CAM software which generates machine instructions. However, 2D drawings are often generated to indicate key dimensions for quality control purposes.

 

Converting the CAD File to a CNC Program
The CAD file is exported to a CAM (Computer Aided Manufacturing) software package that contains a range of tools to convert the 3D model into a set of instructions that can be understood by the CNC machine. CAM software is normally used by CNC machine operators to generate G-code. At the end of the process, a G-code file is saved to the machine. This file contains all the relevant instructions required to manufacture the part.

 

Preparing the CNC Machine
Preparing the machine to fabricate a new part number starts with setting up the required fixturing to hold the raw stock material in place while the cutting tool removes material. Alternatively, the raw stock is fixed in a spindle and stationary cutting tools are presented to the rotating stock piece to remove material. The required tooling must be checked for wear or chips and placed into the machine. More advanced CNC machines have automatic tool changers and tool libraries that allow the machine to automatically select the relevant tool needed to machine a specific feature without having to wait for the operator to swap out tools.

 

Executing the Machining Operation
When the material is securely clamped into the machine, the correct tooling is selected and the G-code is loaded, the actual machining can commence. Once the cycle-start button is pressed the machine will select the appropriate tool, move to the workpiece and begin removing material as per the G-code instructions and will continue until the part is complete. For operations that require machining with more than one type of tool, or with the part in more than one orientation, some CNC machines may require the operator to reposition the in-process work material between operations.

 

Components of CNC CNC Machining

 

Central Processing Unit (CPU)
A CNC system is controlled in the CPU or the heart of the system. It is where the information stored in the memory as part program is received. After the data is accepted, the CPU decodes and changes this data into specific position control and velocity control signals. It also oversees the movement of the spindle or control axis to avoid actions that do not match with the programmed data or correct these actions if already taken.

Input devices
Input devices are the devices used for putting in the part program in the CNC control. There are three input devices that are commonly used, which are the magnetic tape reader, punch tape reader, and computer via RS-232-C communication.

Machine Control Panel
A machine Control Panel is a flat area where controlling, monitoring, or managing instruments are displayed, serving as the direct interface between the operator and the NC system. Before a program is executed, the machine should be prepared in terms of loading the system memory with the required part program, establishing a correct reference point, and other necessary command. After the preparation, the CNC then controls the axis of the motion, spindle function or tool function on the machine, following the part program stored in the memory.

Machine Tool
There are different types of machine tools a CNC controls but what they all have in common is a slide table and a spindle to control the position and speed.

Programmable Logic Controller (PLC)
A PLC is an industrial solid-state computer that matches the NC to the machine, which follows a pre-programmed sets of rules and carry out outputs based on inputs to control system and make logic-based decisions for the CNC machine. It is used to minimize manual operation and can survive harsh conditions such as extreme heat, cold, dust, and moisture.

Servo Control Unit
The servo control unit is responsible for precise position control as it receives the position feedback signals for the actual movement of the machine tool axes from the feedback devices. It generates suitable signals as command values, which are interfaced with the axes and the spindle motors.

Feedback Devices
The feedback devices, which is also referred to as the measuring system, consist of position and speed transducers that act as sensors to monitor the current position of the cutting tool at any instant.

Display Unit
The display unit is a monitor or an interactive device between the machine and the operator which displays the present status of the programs, commands, and other necessary data of the CNC machine. It can also be useful for maintenance and installation work because it can display other important information such as machine parameters, logic diagram of the program controller, error messages, and diagnostic data.

 

How to Maintain CNC Machining
Precision Prototype Machining
Titanium Processing
Steel Processing
Standard Hydraulic Valve Core

Precision is the heartbeat of CNC machining, capable of achieving hair-thin accuracy (within 0.0001 inches). The key to unlocking this precision lies in a practice that is both essential and deceptively Simple: Maintenance. In the realm of CNC machining, where precision is paramount and errors come with a high price tag, understanding the core maintenance tasks is not just practical but imperative.

Coolant Management: CNC machining rely on proper coolant levels and concentration to dissipate the heat generated by swift tool movements, ensuring the integrity of workpieces and tools.

Efficient Cooling: Spindles racing at speeds over 10,000 RPM demand efficient cooling to fend off thermal challenges. Temperature sensors stand guard, providing alerts for temperature variations.

Lubrication: Like a well-choreographed ballet, CNC machining necessitate precise lubrication to maintain the seamless motion of intricate parts, preventing premature wear.

Fluid Oversight: Beyond lubrication, careful monitoring of hydraulic and other fluid levels is essential. Unusual fluid consumption might hint at underlying issues.

Surface Hygiene: In a universe where precision rules, even surfaces matter. Regularly wiping down surfaces—windows, doors, lights, handles—ensures clarity, grip, and a spotless work environment.

 

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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FAQ
 

Q: Is CNC machining 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: Why is CNC machine used?

A: This type of machining requires fewer machine operators since one skilled operator can run several machines at one time. Since the CNC is so accurate it reduces errors from the manufacturing process and eliminates unnecessary waste.

Q: What is CNC machining good for?

A: The ability to create highly durable and corrosion-resistant parts makes CNC machining invaluable for marine applications. Electronics: The electronics industry relies on CNC machining for the fabrication of printed circuit boards (PCBs), connectors, semiconductors, and intricate components.

Q: How long does CNC machining take?

A: CNC machining can take anywhere from a few seconds to many hours. The duration depends on the type of machining process, the part complexity, and the scale of operations.

Q: Can a CNC machine cut metal?

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 most commonly a CNC machine is used for?

A: CNC lathes, also known as turning machines, are probably the most common type of CNC machine. They are used to create cylindrical parts by cutting and shaping materials such as metals, plastics, and composites, on a rotating lathe.

Q: Is it hard to learn CNC machining?

A: Sure, the career of CNC machining is challenging, but that is part of the excitement. Every day of your hard work brings tangible results. The help of the right CNC machining training program can ensure you are well-prepared for any field-related job upon graduation.

Q: Is there a lot of math in CNC machining?

A: Spoiler alert, in Precision Machining, we all use a lot of math through algebra, geometry trig and statistics. Our machinists and quality technicians use and apply algebra, geometry, trig and statistics on the job everyday.

Q: Are CNC machines legal?

A: California law now also makes it generally unlawful to sell, offer to sell, or transfer a CNC milling machine or 3D printer that has the sole or primary function of manufacturing firearms to any person who does not have a federal firearms manufacturer or importer license, and makes it unlawful for people without such a ...

Q: How thick of metal can a CNC machine cut?

A: Entry-level plasma machines may be suitable for cutting up to 12mm (half inch). Mid-range CNC plasma machines such as the Australian-made Surefire CNC range can cut up to 32mm thick steel. However, high-end industrial CNC plasma systems with high definition can cut steel plates that are 50-60mm thick.

Q: Do you have to be smart to be a CNC machinist?

A: Some of the hard and soft skills required to fulfill this role are analytical or critical thinking, technical writing, mathematics, and dexterity skills. Better-than-average additive manufacturing knowledge is a plus. Familiarity with specific computer applications and physical stamina are also among the skills needed.

Q: What degree do you need for CNC machining?

A: Working as a CNC machinist requires a high school diploma or GED. Most companies require that you attend a trade school and complete its program to obtain the necessary skills and knowledge for this position. Some CNC machinists have earned associate degrees. Most corporations don't require this.

Q: Do you need a computer to run a CNC machine?

A: You simply need a computer that will run the software needed to operate your CNC. There are three types of software needed to operate a CNC. Design software (CAD) is used to create project designs. CAM (computer-aided machining) software is used to generate tool paths and convert them into gcode.

Q: Can I make gun parts with a CNC machine?

A: In today's manufacturing industry, Computer Numerical Control (CNC) machines have revolutionized the way gun parts are made. These machines can precisely cut and shape metal, making custom gun parts easy to create.

Q: Can you cut sheet metal with a CNC?

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: Can I cut wood with a CNC machine?

A: CNC machines can cut wood with end mills and router bits effortlessly. The article below describes how CNC mills and router bits are different in capabilities and how both can be used in woodworking.

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

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