Using computerized controls and rotating spindle-head, CNC milling removes material from the workpiece to create a part that meets the required specifications. A variety of substrates can be machined in this process, including plastic, metal, wood, and glass.
Several different processes can be used in CNC machining, including mechanical, chemical, electrical, and thermal processes. CNC milling falls under the category of a mechanical process, since cutting and drilling are powered mechanically, without any manual operation.
The CNC milling process follows the same steps many other machining types do. It can mainly be divided into the following steps: 1. Designing a CAD model and export it to a CNC file format. 2. Converting the CAD model into a CNC program using CAM software. 3. Setting up the CNC milling machine by setting up the worktable and the workholding device, and attaching the milling tools and machine spindle. 4. Executing the milling operation. Depending on the type of part, we can use horizontal or vertical milling machines. When the milling process starts, the cutting tool will rotate at incredibly high speeds — up to thousands of revolutions per minute! It can create many different shapes, holes and any other impression the part requires.
1. Materials Range
We have more than 50 types of plastic and metal block with different specifications for CNC machining.
2. Custom Surface Finishes
We provide various surface treatment options, including anodizing, electroplating, powder coating, and more, to enhance the appearance and performance of your parts.
3. High Precision Tolerances
Precision tolerances vary, due to size and material types, from +/-0.001″ to +/-0.005″.
4. Cost and Time Efficient
Our efficient production process and advanced equipment help reduce costs and shorten delivery time.
5. Complexity Requirement
We can handle complex parts with intricate geometries and tight tolerances, meeting your specific requirements.
6. Integrated Service
We possess different but mature product lines. We can meet your various demands and provide best solution.
Metric Units
Maximum part size：1100mm * 650mm * 650mm<br>
Minimum part size：0.5mm<br>
Imperial units
Maximum part size：43.3 in * 25.6in * 25.6 in
Minimum part size：0.019 in
Metric Units
Maximum part size：650mm * 650mm * 300mm<br>
Minimum part size：0.5mm
Imperial units
Maximum part size：43.3 in * 25.6in * 25.6 in
Minimum part size：0.019 in
| Aluminum | Stainless steel | Mild, Alloy & Tool steel | Other metal |
| 6061-T6 | 303 | Mild steel 1018 | Brass C360 |
| 6082 | 304L | Copper C101 | |
| 7075-T6 | 316L | Mild steel 1045 | Copper C110 |
| 5083 | 2205 Duplex | Alloy steel 1215 | Titanium Grade 1 |
| 5052 | 17-4 | Mild steel A36 | Titanium Grade 2 |
| 15-5 | Alloy steel 4130 | Invar | |
| 2014 | 416 | Alloy steel 4140 | Inconel 718 |
| 2017 | 420 | Alloy steel 4340 | Magnesium AZ31B |
| 2024 | 430 | Tool Steel A2 | |
| 6063 | 440C | Tool Steel A3 | |
| 7050 | 301 | Tool Steel D2 | |
| A380 | Tool Steel S7 | ||
| MIC 6 | Tool Steel H13 | ||
| Tool Steel O1 |
| Plastics | Reinforced Plastic |
| ABS | Garolite G-10 |
| Polypropylene | Polypropylene (PP) 30%GF |
| Nylon 6 | Nylon 30%GF |
| Delrin (POM-H) | FR-4 |
| Acetal (POM-C) | PMMA (Acrylic) |
| PVC | PEEK |
| HDPE | |
| UHMWPE | |
| Polycarbonate | |
| PET | |
| PTFE (Teflon) |
As-MachinedThis is the standard finish option. Burrs and sharp edges are removed after machining.
AnodizedParts are anodized type II or III coating to the surface. Ideal to improve corrosion and wear resistance of components. Parts can be anodized in different colors. Clear, black, red, and gold are the most common.
ElectropolishedElectropolishing is an electrochemical process that removes material from a metallic product, reducing the surface roughness by levelling micro-peaks and valleys, improving the surface finish.
BrushedBrushed or dull polished metal is metal with a unidirectional satin finish. It is produced by polishing the metal with a 120–180 grit belt or wheel then softening with an 80–120 grit greaseless compound or a medium non-woven abrasive belt or pad. Commonly brushed metals include stainless steel, aluminum, and nickel.
Powder CoatPowder coating is a type of coating that is applied as a free-flowing, dry powder. This is a process where powdered paint is sprayed onto a part then baked in an oven. It creates a strong, wears, and corrosion-resistant layer that is more durable than standard painting methods. A wide variety of colors are available to choose from.
Laser engravingLaser engraving is the practice of using lasers to engrave the product and leave marks on it, which also includes color change due to chemical/molecular alteration, charring, foaming, melting, ablation, and more. By this technique, the surface will still be smooth, and the mark will not wear out.
Screen printingScreen printing is a printing technique to stretch silk fabric, synthetic fiber fabric or metal mesh on the screen frame, and use hand-carved paint film or photochemical plate to make screen printing plate.
| Tolerances for Linear Dimensions（GB/T 1804-2000, class f） | ||||||||
| Dimension (mm) | 0.5～3 | 3～6 | 6～30 | 30～120 | 120～400 | 400～1000 | 1000～2000 | 2000～4000 |
| Tolerances | ±0.05 | ±0.05 | ±0.10 | ±0.15 | ±0.20 | ±0.30 | ±0.50 | ---- |
| Tolerances for Angle Dimensions（GB/T 1804-2000, class f） | ||||||||
| Dimension (°) | ≤10 | 10～50 | 50～120 | 120～400 | 400 | |||
| Tolerances | ±1° | ±30° | ±20° | ≤10 | ±5° | |||
1. Keywords: good quality, convenient
The parts are of good quality and online purchasing is very convenient. Save a lot of time for us. Thanks!
2. Keywords: good quality, fast delivery
I have tried the CNC prototype once in ALLPCB. The quality and lead time are beyond our expectations. So we decide to do more parts here. Super convenient.
3. Keywords: professional good quality, fast delivery
I opened the website accidentally and tried to upload my drawing to get a quote. The sales was professional so I placed the order. Then I got my parts, it's good. Nice experience.
4. Keywords: long-term cooperation, good quality
I heard about ALLPCB from other companies several times. So I contacted and try to do a prototype here. Very good quality. This is our third order. We would like to do long-term cooperation with them.
The biggest difference between CNC processing services and ordinary general lathes, CNC machining center than general ones more than the knife library and tool change device. CNC machining center to further improve the degree of automation and production efficiency of general lathes. The most specific difference between CNC machining center and general CNC machine tools is that CNC machining workpiece only clamping once. The system device can control the machine tool to automatically change the tool, and can realize the workpiece milling on the machining surface. Drilling, reaming and tapping, especially for box parts. General CNC machine tool change knife is very troublesome, need manual replacement. Therefore, numerical control machining center has many advantages, it is an essential equipment in the production of numerical control machine tools. For example, the existing five-axis machining center can hardly replace other CNC equipment. The 5-axis machining center can be used for machining complex space curved parts such as propeller and aircraft curved parts. The application field is one of the most mechanical devices in all high-tech industries.
CNC machining center has the following advantages compared with general lathe:
1. Reduce the number of machine tools and equipment management. For a machining process of many parts, only a CNC machining center can complete all processing.
2. Because the workpiece can be clamped at a time, the whole process can be completed, and the positioning error caused by the workpiece clamping on different CNC machine tools can be avoided. The precision of CNC machining centers can be used to ensure the quality of the workpiece.
3. Only need a CNC machining center can complete the work of a number of general lathes, process concentration, shorten the processing time, improve productivity.
Surface treatment is an important process in CNC machining of aluminum alloy shells. It can improve the appearance, corrosion resistance, and wear resistance of the parts.
1. aluminum alloy shell CNC machining tin - cobalt alloy plating
Tin-cobalt alloy plating is a common surface treatment for aluminum alloy shells. It can improve the corrosion resistance and wear resistance of the parts, and also enhance their appearance.
Copper-tin alloy plating gives the aluminum alloy shell a golden appearance, which is beautiful and durable.
2. aluminum alloy CNC machining electroplated copper-tin alloy
Copper-tin alloy plating is another common surface treatment for aluminum alloy shells. It can provide a golden appearance and good corrosion resistance.
1. Process analysis of CNC machining center
Process analysis is the first step in CNC machining, which is to analyze the process requirements of the parts, determine the processing method, and formulate the processing plan.
The main task of process analysis is to determine the processing method, processing sequence, processing equipment, and processing parameters.
The previous part is suitable for machining center processing of the object, the processing content selection here refers to the selection of parts, parts on the selection of suitable machining center surface. The surface here usually means:
Surface with higher dimensional accuracy requirements
High requirements for phase accuracy of the surface
Complex curves and surfaces that are difficult to process with ordinary machine tools
Can be concentrated processing of the surface
2. Industrial analysis of CNC milling
CNC milling is a common machining method in industrial production. It has the advantages of high efficiency, high precision, and high flexibility.
1. Curves on parts
2. The spatial surface of the mathematical model
3. The part with complex shape
4. It is difficult to observe
5. Simple surface can be installed
6. The general processing content can double improve productivity
High-precision machining is a machining method that requires high precision, high surface quality, and high efficiency. It is widely used in aerospace, electronics, medical equipment, and other fields.
The processing flow of high-precision parts includes: pre-processing check, raw material check, processing, self-inspection, and quality inspection.
Pre-processing check includes: checking whether the mechanical parts are loose, whether the processing technology of parts is reasonable, and whether the machining position of CNC parts is correct.
Raw material check includes: whether the raw materials meet the requirements, whether the raw materials are sufficient, and whether the raw materials are properly stored.
Self-inspection is an important part of quality control. It includes: dimensional inspection, surface quality inspection, and processing accuracy inspection.
Deep processing of aluminum alloy shells can improve their performance and service life. It includes: surface treatment, heat treatment, precision machining, and assembly.
1. Our certificates: ISO9001、ISO45001、ISO14001、SGS
2. Inspection report included in every order. Full dimensional inspection reports on request.
3. Material certifications and test reports are available on request.
4. Strict NDA agreements with all partners
5. Close tracking on lead time and quality, timely update
