CNC Machining centers developed from CNC milling machines. The biggest difference compare to CNC milling machines is that the machining center has the ability to automatically exchange machining tools, by installing tools for different purposes on the tool magazine, the machining tools on the spindle can be changed through the automatic tool changing device in a single clamping device to achieve a variety of machining functions.
CNC Milling Finish
Process
Roughness Ra(um)
Cylindrical milling cutter milling (rough)
12.5~3.2
Cylindrical milling cutter (fine)
3.2~0.8
Cylindrical milling cutter (precision)
0.8~0.4
Cylindrical milling cutter (rough)
12.5~3.2
Cylindrical milling cutter milling (fine)
3.2~0.8
Cylindrical milling cutter milling (precision)
0.8~0.4
Cutter milling (fine)
12.5~3.2
End milling cutter (rough)
3.2~0.4
End milling cutter (precision)
0.8~0.2
High speed milling (rough)
1.6~0.8
High speed milling (fine)
0.4~0.2
CNC milling centers and high-Precision Machining centers. Ordinary machining center, resolution of 1μm, maximum feed speed of 15 ~ 25m / min, positioning accuracy of about 0μm. High-precision machining center, resolution of 0.1μm, maximum feed speed of 15 ~ 100m / min, positioning accuracy of about 2μm. Between 2 and 10 μm, with a ± 5 μm more, can be called precision grade. FCE equipped with different grade and different size CNC milling center. Take in to account into both economic and quality in parallel.
Post-processing is the final step in the CNC machining process. In a quick guide, we offer a lot of surface treatments to complete your final parts and get them to meet strict specific requirements. It should be noted that in CNC machining, post-processing is in optional, as the quality of the machined parts is already very high.
The anodizing process allows the part to obtain excellent corrosion resistance, increasing the hardness and wear resistance of the surface. Anodizing is also the most common pre-painting treatment, which can help the painted surface to obtain good adhesion. We typically apply two types of anodizing in our production: Type II, corrosion resistant; Type III is thicker, adding a layer of wear resistance. Both anodizing processes can achieve a variety of color effects.
Grinding polish, it offers the fastest turnaround parts and does not require post-processing. The surface finish of the grinding part is equivalent to 125 um in Ra, and the requirements can be increased to 63, 32 or 16 um Ra. Minor tool marks may still be visible on the last part.
Powder Coating is thermoplastic powder spraying directly on the processed part. The sprayed parts are then baked in an oven to form a durable, abrasion- and corrosion-resistant plastic coating. In the powder coating process, its color, brightness, surface roughness can be customized.
Shot peening is the high-speed spraying of beads of different hardnesses and sizes onto the surface of the part. To get different textures and brightness of the surface. Since the surface has been hit by similar forging beads, the hardness and wear resistance of the surface have also been enhanced.
CNC machining is a universal machining process, especially parts that can be cut and machined can be achieved through CNC, from simple shape shapes to complex curved structures. However, as with every manufacturing technique, CNC machining has some design limitations. We break them down as follows to ensure that your products are optimally designed to better fit the CNC machining process.
When designing parts, the size of each part is different according to the application environment, working conditions, etc., and the requirements for the machining accuracy of the workpiece are also different. Although CNC machining can achieve very high machining accuracy, we should also be aware that demanding machining accuracy and accuracy (strict product tolerances) usually mean Longer production times and higher costs. If a specific tolerance is not specified in the product design, we recommend choosing at the following levels.
Permissible deviations in mm for ranges in nominal lengths
Tolerance Class Designation(Description)
fine
medium
coarse
very coarse
0.5 up to 3
±0.05
±0.1
±0.2
--
over 3 up to 6
±0.05
±0.1
±0.3
±0.5
over 6 up to 30
±0.1
±0.2
±0.5
±1.0
over30up to 120
±0.15
±0.3
±0.8
±1.5
over120upto400
±0.2
±0.5
±1.2
±2.5
over 400up to 1000
±0.3
±0.8
±2.0
±4.0
over 1000up to 2000
±0.5
±1.2
±3.0
±6.0
over 2000 up to 4000
--
±2.0
±4.0
±8.0
The highest precision of our equipment is 0.001, and the recommended most precise machining requirements do not exceed +/-0.005mm
All internal vertical edges of our products need to have rounded corners instead of right angles. This is because the tools used in CNC milling are cylindrical, which means they cannot produce inner right-angled edges. The fillet required by this process is called the inner corner fillet. When designing parts, the larger the inner corner fillet, the more efficient the production process. Because of the larger fillets, larger diameter milling cutters can be used to increase milling speed, and fewer swaps can be made to improve accuracy.
Undercut cannot be machined with standard milling cutters, so the use of retract slots for parts should be avoided when designing CNC machined parts. In particular, for non-standard inner contour shapes, customized machining tools are required, which will greatly increase processing time and costs. Secondly, if undercut can not be avoided, due to the limited length of cnc tools, the undercut can not be too deep. If they are too deep or the location is difficult to reach, they will not be able to be produced because the CNC tool cannot reach the machining location.
CNC machining requires your part design to meet minimum wall thickness requirements. In general, it is recommended to choose the thickest possible and avoid very thin or characteristic walls. This is because CNC tools processing thin-walled parts will cause vibration deformation, which may cause interruptions or damage, and the size is out of specification. The standard minimum wall thickness for CNC machined metals is 0.030" (0.76 mm) and for plastics is 0.060" (1.5 mm).
When designing parts, it is useful to choose the largest possible thread size because smaller taps have a higher risk of breaking during production. If possible, avoid using deep hole threads as they lead to higher production costs, especially when custom tools are required.
In principle, materials with high hardness are easier to process because better processing accuracy can be obtained, but they are limited by the hardness of processing tools, so the hardness of the generally recommended parts is 8 ~ 60HRC, and for metal materials, the hardness is greater than stainless steel Followed by cast iron, followed by copper, and finally aluminum, while the processing of ceramics, plastics, etc. belongs to the processing of non-metallic materials. Fast production time.
Although CNC can process thermoplastics, the material properties of polymers still have many difficulties for CNC processing. First, due to poor thermal conductivity, many thermoplastics melt or bend when in contact with CNC milling machines or drill bits. Secondly, the processing of plastics, because the hardness is low, the size accuracy caused by the knife during product clamping and processing is not high. For those parts that do not have special requirements for the strength and hardness of the metal, thermoplastics can provide a cheaper alternative.
Simplifying product design while taking into account functionality usually saves production time and reduces production costs. Because the manufacture of complex structures and surfaces often requires complex longer passes, more layering to obtain the same fine contour quality. This means higher production costs.
Using the same milling machine machining features, larger and same internal fillets, can reduce the number of tools used to reduce machining time. For example, if a workpiece needs a 10mm end face milling cutter to process some features, it also needs a spherical milling cutter to process a curved surface, and a 2mm milling cutter to process a fine groove, which will require repeated tool changes and reduce the machining efficiency
The choice of raw material for machining can have a significant impact on production time and costs for CNC machining. If possible, choose a material with good processability, such as brass or aluminum. For those applications that do not require metal hardness and strength, CNC machining of engineering plastics like PMMA and ABS also helps to reduce costs because the material blank is cheaper, and the processing efficiency is higher.
Higher tolerances and thinner wall thicknesses also increase THE CORRESPONDING CNC machining costs, as it takes time to achieve higher precision cutting. If your product or component can accept a larger size range, choose a lower tolerance to reduce production time and costs. The same is true for wall thickness: a larger wall thickness margin should be chosen.
Surface treatment is often the final stage of the CNC machining process, which can also affect the cost of your entire project. Choosing less surface treatment for your part or product can lead to better time and cost efficiency. FCE can recommend to you how to optimize the surface treatment to balance the conflict between cost and quality according to your final needs.
FCE facilities are equipped with the most advanced and highest precision 3, 4 and 5-axis CNC machines, which allows us to complete your order in record time
1. 15+ year work experience engineers
2. Fastest 5 days delivery
3. Prototypes can be machined as quickly as 1 day.
4. More than 200 metals and plastics material available in stock
5. Tolerances as low as +-0.005mm
6. ISO 9001: 2015 certified factory
7. 40+ CNC machines
8. 50,000+ machined parts per month
We cooperated with many world top 500 companies and awarded good responds always.
Cnc Milling,Cnc Milling Services,Custom Cnc Milling,Cnc Lathe And Milling Machining Suzhou FCE precision electronics Co., LTD , https://www.fukeyifcesz.com
These 250-meter PoE switches with VLAN function security break the traditional 100-meter limit, greatly extending the transmission distance, and providing a wider product coverage. At the same time, they can effectively suppress network storms and improve network performance and security.
Three super-powered 250-meter PoE switches for security with VLAN function, let everyone look at it quickly.
Product 1: PS5081 
The device provides eight Fast Ethernet PoE ports and one uplink (100Mbit/s) port. It supports three modes of data transmission: extended mode, VLAN, and default. The network extension mode can be easily turned on or off just by using the dial switch.
When the network extension mode is enabled, ports 1 to 8 of the PoE port are isolated from each other and only communicate with the uplink port. That is, ports 1 to 8 cannot communicate with each other and can communicate with the uplink port. PoE ports 1 to 8 negotiate at a rate of 10 Mbps. Both power supply and data transmission can reach 250m.
When the network extension mode is turned off, the PoE1~8 ports and the uplink ports can directly communicate with each other (self-negotiation). That is, ordinary PoE switches support af/at power supply and the transmission distance is 100 meters.
Product II: PS2082
This product provides eight 100M PoE ports and two Gigabit ports. The two Gigabit ports include one Gigabit electrical port and one Gigabit optical port. Supports three modes of operation: "data transfer extension mode", "VLAN", and "default".
In the default standard mode, af/at standard power supply is provided, and the power supply distance is up to 100 meters. When the network extension mode is enabled, the dedicated mode can be monitored and 250 meters long distance power transmission can be provided. In the VLAN isolation mode, 1-8 One hundred trillion ports are isolated from each other to ensure network transmission performance and security.
Product III: PS6016 
The device provides 16 Fast Ethernet PoE outlets and 2 Combo ports. The 2 combo ports are 2 Gigabit electrical ports and 2 Gigabit optical ports for optical multiplexing. They can be flexibly selected according to the usage scenarios. High scalability.
As with the PS2082 above, the PS6016 also uses the “defaultâ€, “data transfer extension modeâ€, and “VLAN†three dial switches.
In the default standard mode, providing af/at standard power supply, power supply distance up to 100 meters; in the network extension mode that is monitoring dedicated mode, the negotiation rate of 1~16 ports is 10Mbps, and the distance between power supply and data transmission can reach up to 250 meters. The remote power supply transmission can be performed. In the VLAN port isolation mode, the 1~16 ports are isolated from each other and cannot communicate with each other, thus suppressing the network storm and improving the network performance.
Features 250m PoE Switch with VLAN Features
Compared with ordinary PoE switches (standard mode), the above three products have more network extension modes and VLAN modes, which are more widely used in functions and applications.
1, Standard mode, equivalent to everyone's common PoE switch, all ports can freely communicate, power transmission distance up to 100 meters, suitable for normal power supply network distance, such as network monitoring or wireless coverage.
2. In the network extension mode, the transmission rate of the PoE port is 10Mbps for auto-negotiation, which can increase the power transmission distance to 250 meters, which greatly prolongs the transmission distance. This not only solves the problem of long-distance transmission in the network monitoring project, but also Can replace the optical fiber and network extender to solve the long-distance power problem. In actual engineering projects, engineering complexity and costs can be minimized.
3, VLAN isolation mode, because it can prevent each port from communicating with each other, inhibit broadcast storms, which can effectively improve the network operating efficiency and security. It is especially suitable for connection scenarios of wireless APs, which can effectively suppress network storms and improve wireless network performance.
Feng Runda's VLAN-based 250-meter PoE switch is designed with a metal case design, industrial-grade workmanship, ruggedness, and reliable performance and data transfer. Whether it is security monitoring, or wireless coverage, can help you easily build a high-quality PoE power supply network.
Not only the gas field, but also the market! The above three products will be listed soon, so stay tuned.
In general, computer numerical control milling machine (CNC) machining is a deductive manufacturing technique that programs 3-axis linkage, complex to 5-axis linkage, drives milling cutters to remove layers from solid blocks called blanks to produce finished parts. CNC milling is one of the main types of CNC Machining, which uses cutting tools that rotate at a speed of several thousand to tens of thousands of revolutions per minute (RPM) to precisely remove materials to obtain parts with complex surfaces. In addition to milling, CNC machining is also equipped with drills, boring tools, thread cutters and other tools to complete different part features at once. CNC machining produces parts based on a computer-aided design (CAD) model that is sent to a CNC machine through computer-aided manufacturing (CAM) software.
CNC milling accuracy
CNC Finishing surface treatment
Anodized
Polishing
Powder coatings
Shot blasting
Design of CNC machining
General Tolerance
Interior angle
Undercut
Chamber wall thickness
Thread
Metal
Polymer
Cost optimization of machined products
Simplify product design
Reduce cutter changes
Proper material selection
Tolerance and wall thickness
Choice of surface treatment
FCE Machining services
Security-Specific 250m PoE Switch with VLAN Function
Following the “big power†of wireless products, Feng Runda has launched a special 250-meter PoE switch with VLAN function. As the third force of 2016 Feng Runda, this series of products pioneered a key monitoring mode, support "data transmission extension mode", "VLAN", "default" three kinds of work modes. Undoubtedly, this means that new products are very eye-catching.