Precision Machining

CNC Machining Service

GPM is a professional precision machining service provider. We have advanced mechanical processing equipment and skilled engineers to provide customers with high-quality processing services. No metter prototype or full-scale production, we can provide process services includes various machining methods such as milling, turning, drilling, and grinding to meet the different needs of customers. We pay attention to quality and efficiency, and guarantee to provide customers with high-quality products and services in the shortest possible time.

CNC Machining-01

How CNC milling works?

CNC milling, or computer numerical control milling, is a precision metal cutting technology driven by a computer program. In the CNC milling process, the operator first designs the part using CAD software, and then converts the design into instruction codes containing parameters such as tool path, speed and feed rate through CAM software. These codes are input into the controller of the CNC machine tool to guide the machine tool to perform automatic milling operations.
In CNC milling, the spindle drives the tool to rotate while the table moves in the X, Y, and Z axes to precisely cut the workpiece. The CNC system ensures that the tool movement is accurate to the micron level. This highly automated and repeatable process not only handles complex cutting operations such as curved surfaces and multi-axis milling, but also improves manufacturing efficiency and part consistency. The flexibility of CNC milling allows it to easily adapt to design changes, and it can meet different manufacturing needs by simply modifying or reprogramming.

CNC machining

What equipment is needed for CNC milling?

What are the advantages and applications of five-axis CNC milling?

Five-axis CNC milling technology occupies a pivotal position in the manufacturing industry with its high precision, high efficiency and powerful processing capabilities. Compared with traditional three-axis CNC milling, five-axis CNC milling can provide more complex tool paths and greater processing freedom. It allows the tool to move and rotate simultaneously in five different axes, allowing for more precise and efficient machining of sides, corners and complex curved surfaces of workpieces.
The advantage of five-axis CNC milling is that it significantly improves production efficiency and processing quality. By reducing the need for clamping and repositioning, it enables the machining of multiple faces in one setup, significantly reducing production time and costs. In addition, this technology can achieve better surface finish and more accurate dimensional control on difficult-to-machine materials, thereby meeting the demand for high-precision parts in industries such as aerospace, automotive, mold and medical devices.

What equipment is needed for CNC milling?

Common types of CNC milling equipment mainly include vertical machining centers, horizontal machining centers and CNC milling machines. Vertical machining centers are widely used in batch manufacturing and single-piece production due to their high speed, high precision and high efficiency. Horizontal machining centers are suitable for precision machining of large parts or parts with complex shapes. CNC milling machines have become the preferred equipment for mold manufacturing and complex surface machining due to their flexibility and adaptability. The selection and use of these equipment is directly related to the efficiency and quality of mechanical processing. By optimizing design and production processes, CNC milling technology will continue to promote innovation and development in the manufacturing industry.

Five-axis CNC milling technology occupies a pivotal position in the manufacturing industry with its high precision, high efficiency and powerful processing capabilities. Compared with traditional three-axis CNC milling, five-axis CNC milling can provide more complex tool paths and greater processing freedom. It allows the tool to move and rotate simultaneously in five different axes, allowing for more precise and efficient machining of sides, corners and complex curved surfaces of workpieces. The advantage of five-axis CNC milling is that it significantly improves production efficiency and processing quality. By reducing the need for clamping and repositioning, it enables the machining of multiple faces in one setup, significantly reducing production time and costs. In addition, this technology can achieve better surface finish and more accurate dimensional control on difficult-to-machine materials, thereby meeting the demand for high-precision parts in industries such as aerospace, automotive, mold and medical devices.

What are the advantages and applications of five-axis CNC milling?

CNC Milling

3-axis, 4-axis, 5-axis machining

CNC milling can help you to achieve high precision, high efficiency and repetitive processing, and can handle various complex shapes, large and small workpieces to reduce manual operations, improve production efficiency and quality, reduce production cycles and manufacturing costs.

List of CNC Milling Machine in GPM

Machine Name Brand Place Of Origin Maximum Machining Stroke (mm) Quantity Precision (mm)
Five-Axis Okuma Japan 400X400X350 8 ±0.003-0.005
Five-Axis High-Speed Jing Diao China 500X280X300 1 ±0.003-0.005
Four Axis Horizontal Okuma Japan 400X400X350 2 ±0.003-0.005
Four Axis Vertical Mazak/Brother Japan 400X250X250 32 ±0.003-0.005
Gantry Machining Taikan China 3200X1800X850 6 ±0.003-0.005
High Speed Drilling Machining Brother Japan 3200X1800X850 33 -
Three Axis Mazak/Prefect-Jet Japan/China 1000X500X500 48 ±0.003-0.005
CNC Milling-01 (2)

How CNC turning works?

CNC turning is a process of metal cutting by controlling a lathe through the execution of a preset program by a computer. This intelligent manufacturing technology is widely used in the machining industry and can efficiently and accurately produce a variety of complex and delicate parts. CNC turning not only provides a high degree of automation and repeatability, but also allows for complex cutting operations such as surface milling and multi-axis milling, greatly improving manufacturing efficiency and part consistency. In addition, due to its high flexibility, CNC turning can easily adapt to design changes, and different manufacturing needs can be achieved with simple modifications or reprogramming.

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What are the differences between CNC turning and traditional turning?

The comparison between CNC turning and traditional turning involves two turning technologies from different periods. Traditional turning is a processing method that relies on the operator's skills and experience, while CNC turning controls the movement and processing of the lathe through a computer program. CNC turning provides higher precision and repeatability, and can process more complex parts in a shorter time. In addition, CNC turning can improve production efficiency and reduce costs by optimizing tool paths and processing parameters. In contrast, traditional turning may require more manual adjustments and longer production cycles when processing complex parts. In short, CNC turning has been widely used in modern manufacturing with its high degree of automation and precision, while traditional turning has gradually been limited to specific occasions or as a supplement to CNC turning.

CNC Turning

CNC lathe, core walking, cutter machine

CNC Turning is widely used in the processing of workpieces in the fields of automobiles, machinery, aviation and aerospace. In the discrete manufacturing industry, CNC Turning is one of the key technologies to help you to achieve high-volume, high-precision processing.

List of CNC Turning Machine in GPM

Machine Type Machine Name Brand Place Of Origin Maximum Machining Stroke (mm) Quantity Precision (mm)
CNC Turning Core Walking Citizen/Star Japan Ø25X205 8 ±0.002-0.005
Knife Feeder Miyano/Takisawa Japan/Taiwan, China Ø108X200 8 ±0.002-0.005
CNC Lathe Okuma/Tsugami Japan/Taiwan, China Ø350X600 35 ±0.002-0.005
Vertical Lath Goodway Taiwan, China Ø780X550 1 ±0.003-0.005
CNC Turning-01

Why use CNC grinding to process parts?

Controlled by a computer program, CNC grinding can achieve extremely high machining accuracy and repeatability, which is critical to producing high-quality, consistent parts. It allows fine machining of complex geometries and adapts to production needs of various levels of complexity. In addition, CNC grinding significantly improves production efficiency and reduces costs by optimizing processing paths and parameters. Furthermore, its flexibility and adaptability means it can quickly adjust to design changes, making it ideal for rapid prototyping and volume production. Therefore, CNC grinding is an indispensable manufacturing process for industries that strive for superior performance and precision engineering.

CNC grinding machines can be divided into many types according to their structure and function, including surface grinders, rotary table grinders, profile grinders, etc. Surface CNC grinding machines, such as CNC surface grinders, are mainly used for grinding flat or formed surfaces. They are characterized by high precision and high surface finish, which are very suitable for processing large plates or mass production of small parts. Rotary table CNC grinding machines, including CNC internal and external cylindrical grinders, are specially used for grinding the inner and outer diameters of circular workpieces. These machines are capable of very precise diameter control and are ideal for manufacturing bearings, gears and other cylindrical parts. Profile CNC grinding machines, such as CNC curve grinders, are designed to grind complex contour shapes. They are widely used in mold manufacturing and the production of complex parts, where precision and detail processing are key requirements.

What equipment is commonly used for CNC grinding?

How EDM work?

EDM Electrospark Machining, full name "Electrical Discharge Machining", is a processing method that uses the principle of electric spark discharge corrosion to remove metal materials. Its working principle is to generate local high temperature to melt and evaporate materials through pulse discharge between the electrode and the workpiece, so as to achieve the processing purpose. EDM Electrospark Machining is widely used in mold manufacturing, aerospace, electronics, medical equipment and other fields, especially for the processing of difficult-to-process materials and parts with complex shapes. Its advantage is that it can achieve high precision and high surface quality, while reducing mechanical stress and heat-affected zone, and improving the wear resistance and corrosion resistance of parts. In addition, EDM Electrospark Machining can also replace manual polishing to a certain extent, improve production efficiency and reduce costs.

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Grinding & Wire Cutting

Improving the machining accuracy and quality

Precision machining auxiliary technology, such as grinding and wire cutting,  can provide more precise machining tools and methods, which can control errors during the machining process, thereby improving the machining accuracy and quality of parts by more diversified processing methods and technologies. It can process parts of various shapes and materials, and also expand processing capacity and scope.

List of CNC Grinding Machine & EDM Machine in GPM

Machine Type Machine Name Brand Place Of Origin Maximum Machining Stroke (mm) Quantity Precision (mm)
CNC Grinding Big Water Mill Kent Taiwan, China 1000X2000X5000 6 ±0.01-0.03
Plane Grinding Seedtec Japan 400X150X300 22 ±0.005-0.02
Internal And External Grinding SPS China Ø200X1000 5 ±0.005-0.02
Precision Wire Cutting Precision Jogging Wire Agie Charmilles Switzerland 200X100X100 3 ±0.003-0.005
EDM-Processes Top-Edm Taiwan, China 400X250X300 3 ±0.005-0.01
Wire Cutting Sandu/Rijum China 400X300X300 25 ±0.01-0.02
Grinding & Wire Cutting-01
Material

Materials

Diversified  CNC processing materials

● Aluminum alloy: A6061, A5052, A7075, A2024, A6063 etc.

● Stainless steel: SUS303, SUS304, SUS316, SUS316L, SUS420, SUS430, SUS301, etc.

● Carbon steel: 20#, 45#, etc.

● Copper alloy: H59, H62, T2, TU12, Qsn-6-6-3, C17200, etc.

● Tungsten steel: YG3X, YG6, YG8, YG15, YG20C, YG25C, etc.

● Polymer material: PVDF, PP, PVC, PTFE, PFA, FEP, ETFE, EFEP, CPT, PCTFE, PEEK, etc.

● Composite materials: carbon fiber composite materials, glass fiber composite materials, ceramic composite materials, etc.

Finishes

Flexibly finishes process on request

● Plating: Galvanized, gold Plating, nickel plating, chrome plating, zinc nickel alloy, titanium plating, Ion plating, etc.

● Anodized: Hard oxidation, clear anodized, color anodized, etc.

● Coating: Hydrophilic coating, hydrophobic coating, vacuum coating, diamond like carbon(DLC), PVD (golden TiN,  black:TiC, silver: CrN).

● Polishing: Mechanical polishing, electrolytic polishing, chemical polishing and nano polishing.

Other custom processing and finishes on request.

Finishes
Heat Treatment

Heat Treatment

Vacuum quenching: The part is heated in vacuum and then cooled by gas in the cooling chamber. Neutral gas was used for gas quenching, and pure nitrogen was used for liquid quenching.

Pressure relief: By heating the material to a certain temperature and holding it for a period of time, the residual stress inside the material can be eliminated.

Carbonitriding: Carbonitriding refers to the process of infiltrating carbon and nitrogen into the surface layer of steel, which can improve the hardness, strength, wear resistance and anti-seizure of steel.

Cryogenic treatment: The liquid nitrogen is used as the refrigerant to treat the material below-130 °C, so as to achieve the purpose of changing the material properties.

Quality Control

Target: Zero defects

Parts process flow & quality control procedure:

1. Document control team manage all the drawings to guarantee the security of customer confidential information, and keep the record traceable.

2. Contract review, order review and process review to ensure fully understand client's requirement.

3. ECN control, ERP bar-code (related to worker, drawing, material and all process). Implement SPC, MSA, FMEA and others control system.

4. Implement IQC,IPQC,OQC.

Quality  Control-01
Machine Type Machine Name Brand Place Of Origin Quantity Precision(mm)
Quality Inspection Machine Three Coordinates Wenzel Germany 5 0.003mm
Zeiss Contura Germany 1 1.8um
Image Measuring Instrument Good Vision China 18 0.005mm
Altimeter Mitutoyo/Tesa Japan/Switzerland 26 ±0.001 -0.005mm
Spectrum Analyzer Spectro Germany 1 -
Roughness Tester Mitutoyo Japan 1 -
Electroplating Film Thickness Meter - Japan 1 -
Micrometer Caliper Mitutoyo Japan 500+ 0.001mm/0.01mm
Ring Gauge Needle Gauge Nagoya/Chengdu Measuring Tool Japan/China 500+ 0.001mm

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