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Materials for CNC Oxyfuel Cutting
CNC Oxyfuel cutting is one of the available methods to fabricate parts from thick metal plates.
Commonly, the upper limit for a manufacturer is around 150 mm but the thicknesses can go much higher than that.
The process entails heating the metal with a mixture of oxygen and fuel gases and then oxidising it.
A high-pressure oxygen jet blows off the slag as CNC controlling, this also creates the cut profiles.
Both the heating and oxidation part set limits to the materials available for CNC flame cutting.
First the metal needs to be preheated to a suitable temperature to induce ignition when the oxygen flow hits the material.
The temperature, though, has to be less than the melting temperature.
This rules out many metals from the possible list of materials for cutting. (It's worth noting that there are some differences in the materials that can be oxy-fuel welded or cut.)
So, what can you cut with the oxy-fuel cutting process?
Flame cutting is suitable for two types of steels – low carbon, or mild steels and wrought iron.
Although the option pool seems really small, flame cutting still has its place cemented in the manufacturing industry due to its relatively low cost of cutting. Another side to consider here is the cost of materials. Those really thick plates or blocks are always, if possible, made from carbon steels anyway to lower costs. So even if the material limitations are quite tight, they leave a lot of suitable work for flame cutters.
CNC Oxyfuel Cutting Steps
Preheat: The metal is heated using a preheat flame generated by the oxygen-fuel gas mixture.
Cutting Jet Activation: Once the metal reaches its kindling temperature, a stream of oxygen is introduced, causing rapid oxidation and the creation of a cutting jet.
Material Removal: The molten metal and oxides are blown away by the cutting oxygen, leaving a clean cut.
CNC Oxyfuel Cutting advantages and Limitations
Oxy-fuel cutting offers numerous advantages, but it also has certain limitations that make it less suitable for some materials and applications.
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Advantages of Oxy-Fuel Cutting
Cost-Effective: Oxy-fuel cutting equipment is relatively inexpensive compared to other cutting methods like plasma or laser cutting, making it accessible to a wide range of industries.
Portability: Since oxy-fuel cutting equipment doesn't require an electrical power source, it can be used in remote or off-grid locations, making it ideal for fieldwork, construction sites, and shipyards.
Cuts Thick Materials: One of the key strengths of oxy-fuel cutting is its ability to cut through thick sections of steel-up to 250 mm thick or more. This makes it especially useful in heavy industrial applications.
Simplicity of Operation: The process is relatively easy to learn and can be manually operated by workers with minimal training. It is also easy to maintain the equipment due to its straightforward design.
Versatility in Gases: Different gases such as acetylene, propane, and MAPP can be used, offering flexibility depending on material thickness and job requirements.
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Limitations of Oxy-Fuel Cutting
Limited to Ferrous Metals: Oxy-fuel cutting is best suited for low-carbon steels and some low-alloy steels. It cannot cut non-ferrous metals such as aluminum, copper, or stainless steel because these materials do not oxidize easily and resist the cutting process.
Slower Speed on Thin Materials: Compared to other cutting processes like plasma, oxy-fuel cutting is slower, especially when cutting thin metals. This makes it less efficient in applications requiring high-speed precision cuts.
Risk of Warping: Due to the high temperatures involved, thin materials may warp during cutting, which limits the accuracy and quality of the cut on delicate materials.
Higher Heat-Affected Zone (HAZ): Oxy-fuel cutting produces a larger heat-affected zone compared to processes like plasma or laser cutting. This can affect the structural integrity of the material near the cut.
CNC Oxyfuel Cutting Machines (Portable type CNC oxyfuel Cutting machines and gantry type CNC oxyfuel Cutting machines)
CNC oxy fuel cutting machine by Hubei Meisar CNC is the most classical and economical oxygen and fuel gas CNC cutting machine. It provides metal fabrication shops with the most economical oxygen and fuel gas CNC cutting solutions. In Hubei Meisar CNC products line, there are Portable type CNC oxyfuel Cutting machines and gantry type CNC oxyfuel Cutting machines:
Portable CNC oxy fuel cutting machine advanced structure and feature:
1. Tailored track acquires high-intensity, high-speed, and high-precision features.
2. Human-computer interface design makes the machine easy to learn and operate and has complete functions.
3. Equipped with portable CNC cutting functions, it can cut carbon steel, stainless steel, and non-ferrous metal plates.
4. Enable the conversion of the CAD into the program file which can be transmitted to the main machine by USB to cut the plate into any shape.
5. With two cutting modes: Flame Cutting & Plasma Cutting.
6. You can switch between Chinese, English, French and Portuguese at any time.
7. The cutting machine can automatically memorize and restore settings when the power is off.
8. Plasma THC (torch height control) device function: By automatically adjusting the height of the torches according to the feedback of the plate height changes, THC can maintain a good cutting effect while protecting the torch from damage and prolonging the lifespan of the nozzles.
9. It is equipped with a status indication device, easy to operate and maintain and understand.
10. With positioning functions of protection cover, proximity switch and dual-speed.
11. It is compatible with domestic plasma and foreign-brand plasma, such as LGK-63IGBT, LGK-100IGBT, LGK-120IGBT, LGK-200HD etc.
| Portable CNC oxy fuel cutting machine MS-P Specification | |
|
Effective Cutting Width |
> 1.0m |
|
Effective Cutting Length |
> 1.5m (can adjust) |
|
Cutting Mode |
Flame, available to add Plasma |
|
Flame Cutting Material |
Carbon steel |
|
Flame Cutting Thickness |
5-120mm |
|
Cutting Speed |
0-3500mm per minute |
|
Optional item |
Extra plasma cutting head |
Gantry CNC oxy fuel cutting machine advanced structure and feature:
1.>Box shape and dual driving gantry on table structure, release gravity and stress,ensure good condition in long life.
2.>Reasonable size: effective cutting area >1.5m*3.0m or more.
3.>Overall structure, divided from basis and cutting platform.
4.>Chinese Taiwan linear guide+lift rail/Taiwan linear guide+G6 rack and pinion,Powerful step/Panasonic Servo+Planetary gear box; perfect running precise and stable transmission.
5.>Ball screw torch height controller,accuracy and safty.
6.>Separated Electric cabinet and CNC controller,safe operation,easy maintaince.
Gantry CNC oxy fuel cutting machine MS-G Powerful CNC Controller
1.>Break point & power off restroration.
2.>Kerf compensation.
3.>Built-in library,Common figures,sustain professional nesting(common line etc) .
4.>Optional 5.7'/10.4'Monitor,64M memory for programs.
| Gantry CNC oxy fuel cutting machine MS-G Specification | |
|
Effective Cutting Width |
> 2.0m |
|
Effective Cutting Length |
> 5.0m (can adjust) |
|
Cutting Mode |
Flame, available to add Plasma |
|
Flame Cutting Material |
Carbon steel |
|
Flame Cutting Thickness |
5-200mm |
|
Cutting Speed |
0-3500mm per minute |
|
Optional item |
Extra plasma cutting head |
|
Japan Panasonic servo |
|
In order to adapt to the development and requirements of the market, we intensified our research and launched new series of CNC Pipe Flame Cutting Machine in line with customer needs. Our company has always pursued the corporate tenet of 'honesty and truth-seeking, dedicated service', and will do our best to meet customer needs and continuously carry out product innovation and service improvement. And depending on excellent quality, reasonable price, best service, we've got got good feedback from customers overseas.
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