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.sjfukeyifcesz.com
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
March 13 Shenyang Steel Market Price Quotes
The product name specification material steel factory/origin price (yuan/ton) is Φ6.5mm higher than that of last month than last week General line Φ6.5mm Q235 Tongsteel 4920 0 -20 520 General line Φ6.5mm Q235 Siping red mouth 4890 0 -20 520 High line Φ6.5mm Q235 Steel 4980 0 0 520 High Line Φ10mm Q235 Steel 4980 0 0 520 High Line Φ8mm Q335 Beitai 4980 0 0 520 Rebar Φ12mm HRB335 Tong Steel 4920 0 -20 520 Rebar Φ14mm HRB335 Tong Steel 4920 0 -20 520 Rebar Φ16-25mm HRB335 Linggang 4850 0 -20 530 Rebar Φ16-25mm HRB335 Tongsteel 4850 0 -20 530 Rebar Φ16-25mm HRB335 Beitai 4850 0 -20 530 Rebar Φ16-25mm HRB335 Xilin 4850 0 -20 530 Rebar Φ8-10mm HRB400 New Fushun Steel 5230 0 -20 610 Rebar Φ8-10mm HRB400 Tong Steel 5230 0 -20 610 Hot Roll 2.0*1250*C Q235 Tong Steel 5780 0 -100 600 Hot Roll 2.3*1250 *C Q235 Tonghua 5650 0 -100 600 Hot rolled coil 2.75*1250*C Q235 Angang 5550 0 -100 600 Hot rolled coil 3.0*1250*C Q235 Angang 5500 0 -100 600 Hot rolled coil 3.0*1250*C Q235 Steel 5500 0 -100 600 Hot rolled coil 4.0*1250*C Q235 Angang 5300 0 -100 650 Hot rolled coil 4.75*1250*C Q235 Angang 5300 0 -100 650 Hot rolled coil 5.5*1500*C Q23 5 Tonghua 5300 0 -100 650 Hot Roll 5.5*1500*C Q235 Steel 5300 0 -100 650 Hot Roll 6.5*1250*C Q235 Ben Steel 5300 0 -100 650 Hot Roll 7.5*1250*C Q235 Steel 5300 0 -100 650 Cold rolled sheet 1.0*1000*2000mm Q195 Angang 6530 0 0 780 Cold rolled sheet 1.0*1250*2500mm Q195 Benxi Steel 6530 0 0 880 Cold rolled sheet 2.0*1250*2500mm Q195 Angang 6500 0 0 850 Cold Rolling Mills*3*1000*2000 Q195 Benxi Steel 6530 0 0 780 Puzhong Plate 8mm Q235 Jigang 6600 0 -30 770 Puzhong Plate 8mm Q235 Angang 6600 0 -30 770 Puzhong Plate 10mm Q235 Angang 6100 0 -30 770 Puzhong Plate 10mm Q235 Jinan Steel 6100 0 -30 770 Puzhong Plate 16-20mm Q235 Angang 5850 0 -30 770 Puzhong Plate 16-20mm Q235 Sky Steel 5850 0 -30 770 Low Alloy Plate 8mm Q345 Angang 6750 0 -30 820 Low Alloy Plate 10mm Q345 Angang 6250 0 -30 820 Low Alloy Plate 14mm Q345 Angang 6100 0 -30 820 Pattern Plate 3mm Q235 Angang 5730 0 0 800 Pattern Plate 4mm Q235 Angang 5730 0 0 830 Pattern Plate 5mm Q235 Ansteel 5730 0 0 830 Pattern Plate 6mm Q235 Angang 5730 0 0 880 Container plate 8mm 16MnR Angang 6750 0 0 570 Container plate 10mm 16MnR Shougang 6700 0 0 600 Container plate 12-20mm 16MnR Shougang 6700 0 0 700 Furnace 8mm 20g Jinan Steel 7050 0 0 920 Boiler Plate 12mm 20g Jinan Steel 6750 0 0 770 Boiler Plate 20mm 20g Angang 6550 0 0 670 Tin Plate 0.21mm*1024*712 T57E 9700 0 0 600 Tin Plate 0.25mm* 1024*712 T57E WISCO 9600 0 0 600 Color Coil 0.5mm*1000*C TST01 Baosteel 8600 0 0 600 Color Coil 0.6mm*1000*C TST02 Baosteel 8500 0 0 550 Galvanized Coil 0.5mm*1000*C SGCC Hengtong 6650 0 -50 600 Galvanized coil 1.0mm*1000*C ST02Z Bengang 6300 0 -50 100 Seamless tube 60*4mm 20# Angang 6850 0 0 300 Seamless tube 108*4.5mm 20# Angang 6500 0 0 0 Seam 133*4.5mm 20# Angang 6500 0 0 Seamless 159*5mm 20# Angang 6300 0 0 Welded pipe 1.5 inch *3.0mm Q235 Linggang 5320 0 0 500 Welded pipe 2 inch *3.25mm Q235 Linggang 5390 0 0 570 Welded Pipe 3" *3.25mm Q235 Linggang 5390 0 0 570 I-beam 12-16# Q235 A-steel 5150 0 0 800 I-beam 25# Q235 Angang 5400 0 0 850 Channel 16# Q235 Angang 5150 0 0 750 Channel 25# Q235 Large Roll / 0 0 Angle Steel 50*5mm Q235 Steel 5050 0 0 800 Angle Steel 100*100mm Q235 Steel 5100 0 0 700