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CNC Turning Services
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CNC Turning Services

CNC turning, also known as computer numerical control turning or CNC lathing, is a machining process used to create cylindrical parts by removing material from a rotating workpiece using cutting tools. 
 
The process is carried out on a CNC lathe, which is a precision machine tool capable of automating and controlling the turning operations.

Overview

Workpiece Setup
The process begins with a cylindrical workpiece, usually made of metal, plastic, or wood. The workpiece is securely mounted and centered on the spindle of the CNC lathe, which rotates at high speeds.
 
Tool Selection And Setup
• The appropriate cutting tool is selected based on the material and the desired shape of the part.
• The cutting tool is mounted on a tool holder, and its position and orientation are set according to the CNC program.
 
Coolant And Lubrication
To reduce heat and extend the tool’s life, coolant or cutting fluid is often applied during the turning process. The fluid helps to lubricate the cutting area and remove chips and swarf generated during machining.
 
CNC Turning Operation
• Once the setup is complete, the CNC lathe is activated, and the program containing the instructions (G-codes and M-codes) is loaded.
• The CNC controller interprets the codes and moves the cutting tool along the workpiece’s length (Z-axis) and across its diameter (X-axis) to remove material, creating the desired shape.
• In some cases, additional axes such as the Y-axis or C-axis may be utilized to perform complex operations, including milling, drilling, or threading.
 
Finishing And Inspection
Once the turning operation is complete, the finished part is inspected for accuracy and quality. If necessary, secondary operations like facing, chamfering, or parting-off may be performed to achieve the final dimensions and surface finish.
 
 
 
 

Industries

CNC turning is widely used in various industries for manufacturing parts with cylindrical or rotational symmetry, such as shafts, pins, flanges, and threaded components. The automation and precision of CNC turning allow for consistent and efficient production, making it an essential process in modern manufacturing. Additionally, CNC lathes can be equipped with multiple tool turrets, live tooling, and sub-spindles, enabling them to perform complex and multifaceted machining tasks in a single setup.

Materials

   Aluminum:AL 6061-T6,6063,7075-T etc 
  Steel:4140,Q235, Q345B,20#,45# etc 
   Stainless steel:303,304,316L,17-4(SUS630) etc 
   Titanium:TA1,TA2/GR2,TA4/GR5,TC4,TC18 etc
 Brass:C36000 (HPb62),C37700 (HPb59),C26800 (H68),C22000(H90) etc
   Copper,bronze,Magnesium alloy,Delrin,POM,Acrylic, PC, etc
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automotive parts accessories

Equipment

CNC lathes are classified according to the mode of movement:
  • Point Control CNC Machine Tool
    The CNC system only controls the exact position of the tool from one point to another, but does not control the movement trajectory, the movement between the coordinate axes is unrelated, and the workpiece is not processed during the movement. This kind of CNC machine tools mainly include CNC drilling machine, CNC jig boring machine, CNC punching machine and so on.
  • Linear Control CNC Machine Tool
    In addition to the accurate position between the control point and the point, the CNC system must ensure that the moving trajectory between the two points is a straight line, and the moving speed must also be controlled, also known as point position linear control. This kind of CNC machine tools mainly have relatively simple CNC lathes, CNC milling machines, CNC grinding machines and so on. CNC machine tools that are simply used for linear control are rare.
  • Contour Control CNC Machine Tools
    Contour control is characterized by the ability to continuously control the displacement and speed of two or more moving coordinates at the same time, it is not only to control the starting point and the end point of the moving parts of the machine tool, but also to control the speed, direction and displacement of each point of the entire processing process, also known as continuous control CNC machine tools. This kind of CNC machine tools mainly include CNC lathes, CNC milling machines, CNC wire cutting machine tools, machining centers and so on.
finished parts
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Quality Assurance

Sorting and inspection:
 
Once the turning operation is complete, the finished parts are checked for accuracy and quality. 
If necessary, secondary processing such as finishes, chamfering or scuttling can be performed to achieve final dimensions and surface finish.

CNC Milling

What is CNC Milling?
 
CNC milling, also known as Computer Numerical Control milling, is a machining process that uses computerized controls and rotating multi-point cutting tools to remove material from a workpiece. The CNC milling machine is guided by a computer program that precisely controls the movements of the cutting tool to create complex shapes and designs with high accuracy.

Here’s How CNC Milling Works:

CAD (Computer-Aided Design) Model
The process begins with a 3D CAD model of the part or object to be manufactured. This digital model serves as the blueprint for the CNC milling machine.
 
 
 
CAM (Computer-Aided Manufacturing) Programming
A CAM software is used to convert the CAD model into a series of machine-specific instructions, called G-codes and M-codes, which the CNC machine can understand. These codes determine the toolpath, cutting speeds, and other parameters.
Setup
The workpiece is securely mounted onto the CNC milling machine’s worktable using clamps or vises. The machine’s cutting tool, typically a rotating end mill, is installed in the spindle.
 
 
CNC Milling Operation
Once the setup is complete, the CNC machine is activated, and the milling process begins. The machine’s computer reads the programmed instructions and moves the cutting tool along the specified toolpath to remove material from the workpiece.
 
Tool Changes And Coolant
Depending on the complexity of the part, the CNC machine may automatically change to different cutting tools during the process. Additionally, coolant or cutting fluid is often used to cool the cutting tool and workpiece, reducing friction and preventing overheating.
 
Finishing And Inspection
After the milling operation is complete, the finished part is inspected for accuracy and quality. If necessary, additional finishing processes such as deburring or polishing may be performed.
 
 
 

Industries

CNC milling is widely used in various industries, including automotive, aerospace, electronics, and manufacturing, for producing complex components, prototypes, and customized parts with high precision and repeatability. Its computerized nature allows for efficient and cost-effective production, as it reduces the need for manual intervention and increases automation in the manufacturing process.

Materials

 Aluminum:AL 6061-T6,6063,7075-T etc 
 Steel:4140,Q235, Q345B,20#,45# etc 
   Stainless steel:303,304,316L,17-4(SUS630)etc 
 Titanium:TA1,TA2/GR2,TA4/GR5,TC4,TC18 etc
 Brass:C36000 (HPb62),C37700 (HPb59),C26800 (H68), C22000(H90) etc
   Copper,bronze,Magnesium alloy,Delrin,POM,Acrylic,PC, etc
cnc machining aerospace parts
aerospace cnc machining
aircraft parts

Equipment

Types of CNC Milling Machines
There are several types of CNC milling machines, each designed for specific purposes and applications. The main types of CNC milling machines include:
Vertical Machining Center (VMC)
• In a VMC, the spindle axis is vertical, and the cutting tool is held vertically in the spindle. The workpiece is mounted on the table, and the tool moves along the X, Y, and Z axes to cut the material.
• VMCs are commonly used for 3-axis milling operations and are well-suited for producing flat surfaces, slots, and pockets.
 
 
Horizontal Machining Center (HMC)
• In an HMC, the spindle axis is horizontal, and the cutting tool is held horizontally in the spindle. The workpiece is mounted on the table, and the tool moves along the X, Y, and Z axes to perform milling operations.
• HMCs are ideal for heavy-duty machining, and they often have multiple pallets for increased productivity and efficiency.
 
5-Axis Machining Center
• A 5-axis machining center has the capability to move the cutting tool along five axes: X, Y, Z, and two rotational axes (typically called A and B axes). This allows for complex and multi-sided machining without the need to reposition the workpiece.
• 5-axis machines are used for intricate and sculptural parts found in aerospace, automotive, and medical industries.
 
Bed-Type Milling Machine
• Bed-type milling machines have a fixed bed on which the workpiece is placed. The spindle can move along the X, Y, and Z axes.
• These machines are robust and often used for heavy-duty machining, such as large components and molds.
 
 
 
 
Gantry-Type Milling Machine
• Gantry mills have a bridge-like structure with two columns supporting the crossbeam, which moves along the X-axis. The workpiece is placed on a table below the gantry.
• Gantry-type milling machines are used for large, heavy parts and offer good stability and rigidity.
 
 
 
Turret Milling Machine
• Turret mills have a fixed spindle and a movable table. The cutting tool can be changed quickly using a tool turret located on top of the machine.
• These machines are versatile and widely used for small to medium-sized production runs.
 
 
 
 
CNC Engraving Machine
CNC engraving machines are specialized milling machines used for creating intricate designs and engravings on materials like wood, metal, and plastic.
Each type of CNC milling machine has its strengths and is chosen based on the specific requirements of the machining task, the complexity of the part, and the material being processed.
 
cnc milling parts
Gallery

Quality Assurance

Finishing and Inspection:
 
Once the milling operation is completed, the finished part is inspected for accuracy and quality. If necessary, additional finishing processes like deburring or polishing may be performed.
CNC milling offers several advantages over conventional manual milling. It provides greater precision, repeatability, and efficiency in producing complex parts and shapes. Additionally, CNC machines can be programmed to run continuously, allowing for automated mass production and reducing the need for constant human intervention.

CNC Machining Centre

Machining centers are developed from CNC milling machines. The biggest difference with CNC milling machine is that the machining center has the ability to automatically exchange machining tools, by installing different tools on the tool library, you can change the machining tool on the spindle through the automatic tool change device in a clip, to achieve a variety of processing functions.
CNC machining center is a high-efficiency automatic machine tool which is composed of mechanical equipment and CNC system and is suitable for machining complex parts. CNC machining center is one of the most widely used CNC machine tools with the highest output in the world. Its comprehensive processing capacity is strong, the workpiece can complete more processing content after a clamping, the processing accuracy is high, on the batch workpiece of medium processing difficulty, its efficiency is 5 to 10 times that of ordinary equipment, especially it can complete many ordinary equipment can not complete the processing, the shape is more complex, the precision requirements of high single-piece processing or small and medium-sized batch multi-variety production is more suitable. 
 
It concentrates the functions of milling, boring, drilling, tapping and cutting threads in one device, so that it has a variety of processing processes. Machining centers are classified according to the spatial position of the spindle machining: horizontal and vertical machining centers. According to the classification of process use: boring and milling machining center, composite machining center. According to the special classification of functions: single table, double table and multi-table machining center. Machining centers for single shaft, double shaft, triple shaft and replaceable headstock. According to the guide rail classification: line rail machining center, hard rail machining center machine.
 

Industries

CNC machining method is increasingly widely used in the manufacturing industry, CNC machining has high precision, with the characteristics of stable quality and high batch processing efficiency, it is widely used in industrial manufacturing production process.
CNC machining machining applications in the following categories:
 
  Medical equipment: CNC processing can be used for medical equipment shell customization and structural parts, Precision water-cooled heat sink and other mechanical parts processing;
 
 
   Marine industry: CNC machining can be used for satellite navigation, radar, automation control, communication and information technology, mathematical models, photoelectric detection and other precision equipment structural parts processing.
   Military equipment industry: CNC processing can be used for individual equipment, Control system customized shell and other military parts processing.
 
  Automobile manufacturing industry: CNC machining can be used for automotive precision parts, New energy control system shell and other precision mechanical parts processing and production.
   Industrial equipment industry: CNC machining can be used for the processing and production of various industrial equipment shells and structural parts, including printing equipment, machine tools, all kinds of monitoring equipment accessories processing customization.
   Aerospace industry: CNC machining can be used to manufacture aircraft parts, satellite radar shell and other precision equipment structural parts processing.
 
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Materials
CNC machining centre is a versatile machining process that can be used with a wide range of materials. The choice of material depends on the specific requirements of the part being produced, including its intended use, mechanical properties, and environmental conditions. Here are some common materials that are well-suited for CNC turning:
  • Metals
    Aluminum: Lightweight, corrosion-resistant, and easy to machine. Widely used in aerospace, automotive, and electronics industries.
    Steel (including stainless steel): Durable, strong, and available in various grades with different properties. Used for a wide range of applications, including automotive parts, industrial equipment, and medical devices.
    Brass: Has good electrical and thermal conductivity, making it suitable for electrical connectors, plumbing fittings, and decorative components.
    Copper: Excellent electrical and thermal conductivity. Used in electrical applications, heat exchangers, and plumbing.
    Titanium: High strength-to-weight ratio and excellent corrosion resistance. Commonly used in aerospace, medical implants, and marine applications.
    Inconel and other high-temperature alloys: Resistant to extreme heat and corrosion, making them suitable for aerospace and gas turbine engine components.​​​​​​​
  • Plastics
    Acrylic (PMMA): Transparent, lightweight, and easy to machine. Used for displays, lenses, and decorative parts.
    Nylon: Tough and wear-resistant. Commonly used in gears, bearings, and other mechanical components.
    Delrin (POM): Low friction, high stiffness, and good dimensional stability. Used for precision gears, bearings, and bushings.
    PVC: Durable and cost-effective. Used in plumbing, electrical insulation, and signage.
    PEEK: High temperature and chemical resistance. Used in aerospace, medical, and automotive applications.​​​​​​​
  • Other Materials
    Wood: Often used for decorative and artistic components.
    Composite materials: Such as carbon fiber or fiberglass composites, used in aerospace, sports equipment, and automotive applications.
    When selecting a material for CNC turning, it’s essential to consider factors like mechanical properties (strength, hardness, elasticity), thermal properties, chemical resistance, machinability, and cost. Additionally, the choice of cutting tools, machining parameters, and coolant/lubrication will vary depending on the material being machined. Consulting with a material expert or CNC machining specialist can help ensure the right material is chosen for your specific application.​​​​​​​

Equipment

CNC Machining Center Machine Mainly Has The Following Four Types:
quality of CNC machining parts
Gallery

Quality Assurance

How to improve the quality of CNC machining parts
 Before CNC machining, please use the calibrator to check whether the tool swing is within the allowable tolerance range. Before processing, blow the cutter head and lock nozzle clean with an air gun, or wipe the installation knife with a cloth. Precision and quality have a certain impact.
 The list of CNC machining procedures should be consistent with the direction of the reference Angle indicated by the mold, and then check the 3D drawing, especially the workpiece that has been drilled and transported. Need to check that the 3D drawing and the level on the workpiece are consistent.
 
 
 The program list of CNC machining files should be standardized, including model, name, program name, processing content, tool size, feed rate, especially the safe length of the tool holder, the reservation margin of each program and the indicator light. A knife. Speak clearly.
 Before processing must understand the content of CNC machining program. The program must have 2D or 3D texture, must be marked with "X length, Y width, Z height" six sides of the data, the plane marked with "Z" value, convenient for the operator to check the correct data after processing. Where there is a tolerance, the tolerance data should be indicated.
 The rational use of CNC machining tools should strictly distinguish the processing of steel and copper light knives. The remaining amount of the light knife should be reasonable, so that the finish of the workpiece and the service life of the tool are possible. It's better.
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Yi Sheng Precision

Through the practice and summary of material analysis and structural mechanics, we provide diversified solutions for the post-processing of parts, and create low-cost and high-performance products according to customers' comments and performance experience. The company is located in Zhenjiang, Jiang

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