Hansheng Automation (Dongguan) Co., Ltd. is one of the most experienced manufacturers and suppliers of precision cnc machining service in China. If you're going to wholesale bulk cost-effective precision cnc machining service made in China, welcome to get pricelist and quotation from our factory. Also, customized service and OEM&ODM service are available.
Hansheng Automation, a professional supplier of core components for tobacco packaging machines and packaging machinery, focuses on high-precision manufacturing and leverages mature CNC machining technology to provide customized component solutions. Gear manufacturing utilizes Kashifuji KPS30 equipment, capable of ISO Class 5 high-precision machining (module 0.1-5.0). CNC machining capabilities include ultra-mirror finishes (±0.002mm) and precision grinding/milling (±0.005mm), utilizing vertical/horizontal machining centers and Western-style wire-cutting equipment. We also offer sand, lost foam, and gravity casting processes (maximum size 3800×1500×1200mm, with a specified tolerance of ±0.03mm). We provide integrated services from drawing review to precision machining.
what is CNC machining
CNC machining is an automation technology that controls machine tools to complete precision manufacturing through digital instructions. At its core, the CAD model is converted into a G-code program that drives the tool to cut the material to be machined with micron-level accuracy (±0.001mm). Compared with traditional machining, CNC machining supports 3-axis to 5-axis linkage, which can process complex geometries such as aviation blades and spiral surfaces. It can also handle different materials, such as metals such as aluminum, steel, iron, plastic materials such as PEEK and ABS, and other composite materials. At the same time, CNC machining technology can also achieve efficient and continuous production, which is suitable for high-volume production.
The process of CNC machining
1. Cad Modeling
Use the 3D modeling software SolidWorks/AutoCAD to build a 3D model of the product to be machined.
2. Cam Programming
The model is imported into Mastercam/UG to generate a toolpath and output as G-code, which is used to drive CNC machining tools for dynamic milling. Contour layering is used for roughing milling (depth of cut 2-5 mm) and spiral interpolation (surface roughness Ra≤0.8 μm) is used for finishing milling.
3. Machine Settings
This step designs fixture selection and tool calibration. Clamps can be selected with vacuum suction cups, vises, special fixtures, and more. To calibrate the tool, the probes in the machine first perform position detection to ensure that the multi-tool system compensates for errors every time it is machined.
4. Processing Execution
When machining, it is necessary to use sensors to monitor the wear of the tool in real time, as well as to control the cutting speed of the tool, which is different for different processing materials. The cutting speed of aluminum alloy is 2000-5000mm/min, stainless steel is 800-1500mm/min, and titanium alloy needs oil mist cooling (spindle speed≤3000rpm).
5. Quality Inspection
Precision instruments such as spiral micrometer, three-dimensional detector, surface roughness tester and other precision instruments are used to measure the dimensional tolerance (± 0.01 mm) and surface roughness (Ra ≤ 0.4 μm for precision parts). A spectrometer is used to determine whether there are defects in the processed product.
6. Post-treatment Process
The finished product also needs to be processed, such as anodizing, electroplating and other operations (such as gold plating, silver plating, copper plating, chrome plating, nickel plating, etc.) for metal processing parts. For plastic processing parts, it is to remove burrs, laminate and other operations.
7. Product Testing
A series of tests are carried out on a series of samples from the processed products to ensure that the products can meet the requirements of the customer's actual working conditions.
Commonly used CNC machining equipment
There are five kinds of CNC machining equipment commonly used in our factory, which are five-axis CNC machine tools, turn-mill compound machine tools, high-speed milling machines, wire cutting, and laser cutting machines. The following compares the functions and features of each of these devices.
|
Device type |
Core features |
Accuracy metrics |
Fields of application |
|
Five-axis machining center |
Complex surface machining (impeller/mold cavity) |
The positioning accuracy ± 0.003mm |
Aerospace, automotive engines |
|
Mill-turn machines |
Turning + milling is completed in one clamping |
C-axis positioning accuracy ± 1 arc second |
New energy battery shells, precision shafts |
|
High-speed milling machine |
Efficient cutting of aluminum alloy (wall thickness ≤3mm) |
Cutting speed5000mm/min |
3C product shell and heat sink |
|
Wire EDM |
Precision machining of high-hardness materials (hardened steel/cemented carbide) |
Surface roughnessRa≤0.2μm |
Precision molds, gears |
|
Laser cutting machine |
Non-contact sheet cutting (carbon steel≤20mm) |
The width of the slit ≤ 0.1mm |
Sheet metal structural parts, decorative panels |
Material selection
CNC machining can be selected for different application scenarios of a variety of materials, common materials are aluminum alloy, stainless steel, titanium alloy, copper alloy and engineering plastics, etc., and then from the characteristics of these materials detailed analysis, to help you better determine which CNC machining materials need to be used in your project.
|
material |
Commonly used models |
Density (g/cm³) |
Tensile Strength (MPa) |
Thermal conductivity (W/m·K) |
Typical Applications |
advantage |
limitations |
|
Aluminum alloy |
6061-T6, 7075-T6, 5052-H32 |
2.6-2.8 |
240-570 |
120-200 |
Aerospace structural parts, automotive brackets |
Lightweight (density ≈ 1/3 of steel), high specific strength |
Poor corrosion resistance (anodizing required) |
|
stainless steel |
304, 316L, 17-4PH |
7.9-8.0 |
505-1300 |
15-25 |
Medical devices, chemical valves |
Corrosion resistant (316L chloride ion corrosion resistant) |
Significant work hardening (30% higher tool loss) |
|
Titanium alloy |
Ti6Al4V, Ti-3Al-2.5V |
4.4-4.5 |
895-1000 |
6-7 |
Aviation fasteners, artificial joints |
Biocompatible, high temperature resistance (≤450°C) |
Poor thermal conductivity (prone to cutting heat build-up) |
|
Copper alloys |
H62 brass, C110 copper |
8.4-8.9 |
330-350 |
120-400 |
Electrical connectors, radiators |
Excellent electrical and thermal conductivity (copper conductivity ≥ 58MS/m) |
Easy to oxidize (requires surface coating protection) |
|
Engineering plastics |
PEEK, PC, ABS |
1.1-1.4 |
60-100 |
0.2-0.5 |
Semiconductor fixtures, insulating parts |
Chemical resistance (PEEK resistance to strong acids and alkalis) |
High coefficient of thermal expansion (processing requires cooling and temperature control) |
FAQ
Q: Can your CNC machining accuracy meet the stringent requirements of tobacco packaging machine components?
A: Absolutely. Our CNC machining covers the full range of precision gradients: ultra-mirror machining accuracy of ±0.002mm, precision grinding/turning accuracy of ±0.005mm, and general turning accuracy of ±0.01mm. This meets the fine tolerance requirements of tobacco packaging machine transmission components (such as cam dividers and gears). Furthermore, core transmission components (such as harmonic reducers with customized backlash ≤5 arc seconds and planetary gearbox P0-stage backlash ≤1 arc minute) are calibrated using gear testing machines and three-dimensional coordinate measuring machines.
Q: What materials do you recommend for tobacco packaging machine components?
A: Based on the "hygiene, corrosion resistance, and low wear" requirements of tobacco packaging machines, we recommend the following materials: stainless steel (304/316L), aluminum alloy (6061-T6), and brass. We can provide material selection recommendations based on the specific operating conditions of the part and match the corresponding machining processes (such as anti-stick treatment for stainless steel and anodizing for aluminum alloys).
Q: What information do I need to customize CNC parts for tobacco packaging machines? How long does the process take?
A: 2D/3D drawings (such as CAD/SolidWorks format) are required, indicating key dimensional tolerances, surface roughness, and operating conditions (such as force and temperature). If samples are available, reverse mapping of the samples can also be provided.
The customization process consists of three steps: ① Drawing review + material/process confirmation; ② Small-batch proofing/testing; ③ Mass production. The overall lead time can be shortened by negotiation for urgent needs.
Q: What equipment do you use to process complex curved parts (such as special-shaped transmission cams) in tobacco packaging machines? How do you ensure accuracy?
A: Complex curved parts are primarily machined using five-axis machining centers (positioning accuracy ±0.003mm) and Western Wire EDM machines (WEDM M50B). The former supports 3-5 axis synchronization and can complete curved surface forming of special-shaped parts such as cams and impellers in one operation. The latter can achieve a roughness of Ra ≤ 0.2μm for high-hardness materials (such as hardened steel). To ensure precision, we use machine tool probes to calibrate fixture errors before machining, use sensors to monitor tool wear in real time during machining, and scan the entire surface with a three-dimensional coordinate measuring machine after machining to ensure that the surface contour meets the drawing requirements.
Q: Can your casting process produce large structural components for tobacco packaging machines? What are the maximum dimensions and tolerances?
A: Yes. We have sand casting, lost foam casting, and gravity casting processes, and can produce large castings with a maximum size of 3800 × 1500 × 1200 mm (such as the frames and bases of tobacco packaging machines). Regarding tolerance control, we have a free tolerance of ±1 mm and a tolerance of ±0.03 mm for specified critical dimensions. The casting surface can be directly connected to CNC precision milling, reducing secondary machining costs.
Q: After machining, how do you ensure that the quality of the components meets our acceptance standards?
A: We implement a comprehensive "full-process inspection" mechanism:
Raw material testing: Spectrometers verify metal composition (e.g., nickel content in stainless steel, purity of aluminum alloy);
In-process testing: 100% dimensional verification after the first trial cut, and 10% sampling testing during mass production;
Finished product testing: Dimensional tolerances (CMM), surface roughness (roughness tester), and transmission accuracy (gear testing machine) are tested, and a complete inspection report is provided.
Q: Do you provide after-sales support if parts wear or precision deviation occur during use?
A: Yes. We offer a two-month warranty on CNC machined parts. If wear or precision deviation occurs during the warranty period due to non-human factors, we will repair or replace them free of charge. For long-term cooperation, we also provide regular component inspections and maintenance guidance to ensure the continued stable operation of your tobacco packaging machine.
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