The lefthand scrolling photos: The critical control points during manufacture and operating on Flame CNC Oxygen Fuel Cutting Machine
Factors determining cutting quality from flame cutting:
1. Cutting Precision: Flame cutting has the same cutting precision as other types of thermal gas cutting: Plasma cutting and laser cutting. The difference only lies in roughness of cutting kerf;
2. Production Process Technology: CNC Flame Cutting Machine has the same order to deliver value chain with other types of CNC Cutting Machine: Mechanical structure / CNC control system/ Drive and transmission unit/ Outsourced parts. The difference only lies in specific cutting technology;
3. Cutting Torch Movement in along X and Y axis are driven with servo motor, controlled with servo driver, and guided with heavy duty precise linear guiderail;
4. CNC Control Cutting Torch Height Controller: Capacitance type height controller is adopted onto CNC control flame cutting torch. Comparatively, in plasma cutting, torch height controller is arc voltage type;
5. Auto Ignitor on Flame Cutting Torch: This unit helps efficient and automatic ignition of Oxygen and Acetylene cutting gas for flame cutting, in safe and reliable way.
In practical application, the exact applicating form of CNC Flame Cutting Machine varies, which can be designed and manufactured based on customer condition and requirement:
The above 1st and 2nd Photos:
1) CNC Cutting Torch: 2 sets, being installed at the front side of horizontal gantry beam, for high efficient cutting out profile shape parts in identical or mirror symmetry;
2) Strip Cutting Torch: 6 ~9 sets, which are installed at rear side of CNC Cutting Machine mechanical gantry beam, for cutting out strip plates in batch;
3) Advantages: Standard configuration CNC Flame Cutting Machine can meet majority of customer demand. So, it is the basic form of machine;
4) Application: This account for the largest branch selling volume of machine. The “Standard” model is CNC-CG4000, which can cut steel plate with the max. width of 3,200mm;
The above 3rd photo:
1) Configuration: The strip cutting torches are removed from the machine, and leave CNC control profile torches only;
2) Application: No or seldom requirement on strip cutting. The CNC Oxygen Fuel Cutting Machine is used for profile shape cutting only;
3) Quantity of CNC Control Cutting Torch: Usually there are 2 pieces in CNC-CG4000 model machine; Or 3 to 4 pieces in large span (CNC-CG5000 or plus) model machine; Or 1 piece in small span (CNC-CG3000) model machine;
The above 4th Photo:
1) Control and Applicating Form: The sole purpose Triple CNC Flame Cutting Machine does not need CNC control single cut; Or, in some cases, the machine will be added with 1 or 2 sets of triple cutting torches;
2) Triple Torch Installation Position: Usually triple cutting torches are installed at the lateral position of machine mechanical gantry beam: The right most or left most, for the purpose of cutting out edge beveling on edges of steel plate;
3) Integrated Function: With configuration of triple/ strip cutting torches, the CNC Flame Cutting Machine is upgraded into a three in one multi-function machine.
Outline: Compared with other types of CNC Cutting Machine, cutting technology in CNC Flame Cutting Machine is relatively simple and quicker to command. On the other hand, there are still some critical points in the cutting technology:
Shown in the above 1st and 2nd photos:
1) Arrangement: For all the Oxygen fuel cutting torches of CNC Flame Cutter Machine, be it CNC control/ Strip/ Triple cutting torch, there are always three ways of cutting gas deployment: Blue color preheating Oxygen; Blue color cutting Oxygen; Red color Acetylene or Propane;
a) Preheating Oxygen in the range of 0.5~ 1 MPa;
b) Cutting Oxygen in the range of 1.0~ 1.2 MPa;
c) Acetylene or Propane cutting gas around 0.25 MPa;
3) Preheating for Ignition: To start on flame cutting in the machine, first turn on gas line of preheating oxygen. The duration of preheating depends on the Max. thickness of steel plate for cutting: The thicker the plate, the longer the duration of preheating;
Shown in the above 3rd and 4th Photos:
1) Capacitor Type Height Controller for CNC Control Cutting Torch: The cutting torch height controller is installed at top half of cutting torch; Its induction ring is assembled at bottom of the cutting torch, surrounding cutting tip;
2) Auto ignitor is installed alongside the induction ring in the flame cutting torch;
3) Trial Run: Before official Oxygen fuel flame cutting in the machine, operator needs to key in process control parameters of the cutting torch into its CNC controller: Cutting speed and other process control, and validate on effectiveness of automatic ignitor.
There are three general types of Oxygen fuel flame CNC Cutting Machine in use:
1. CNC Flame Cutting Machine;
2. Oxygen Fuel Flame Strip Cutting Machine;
3. Oxygen Fuel Flame Triple Cutting Machine;
Flexible Configuration: In practical application, the above 3 types of CNC Oxygen Fuel Cutting Machine can be either combined into single set of multi-function machine, or configured flexibly:
1. Technical Specifications:
1) Max. Valid Cutting Width: From 2,200mm (CNC-CG3000 model) to 9,200mm (CNC-CG10000 model);
2) Cutting Thickness: From 3mm to 3 specifications of 100mm, 150mm, 200mm;
3) Cutting Length: Standard configuration is 13,200mm (With 15m length cutting rails length);
4) Cutting Program: There are 4 major sources of cutting program: Embedded library; Simple program G code compiled on site; Tailor made complicated external file; Machine imbedded nesting software.
| Standard Model of CNC Flame Cutting Machine | CNC-CG3000 ~ CNC-CG10000 |
| Valid Cutting Rail Span | 3,000 ~ 10,000 mm |
| Valid Range of Plate Width | 80 ~ (2200~ 9200) mm |
| Standard Length of Cutting Rail | 15,000 mm (Can be Special Made) |
| Max. Length of Steel Plate | 13,000 mm |
| Drive Mode for Gantry Movement | Single / Double Servo Drive |
| Flame Cutting Gas | Oxygen and Acetylene/ Propane |
| Quantity of CNC Cutting torch | Standard is 1 ~ 2 sets |
| Quantity of Strip Cutting Torch | Standard is 9 sets |
| Max. Flame Cutting Thickness (Single torch straight cutting) | 150 mm (Special made for 200 mm) |
| Flame Cutting Speed Range | 100 ~1000 mm/min. Servo Drive control Depending on Thickness |
| Gantry Idle Running Speed | Constant 6000 mm/min. |
| Cutting Kerf Roughness | Ra 12.5~25 |
| Finished Cutting Precision | ±0.5mm/1000mm |
1) Characteristics: Strip cutting is the earliest stage product of CNC Flame Cutting Machine. It has the lowest purchase budget and running cost. Cutting process of torches is controlled with A.C. relays, instead of CNC controller. Correspondingly, this machine has the lowest manufacturing cost and selling price;
2) Purpose: This configuration of machine is indispensable in the field of H Beam/ T Beam product, to cut out strip plates of different widths from steel plate;
3) Quantity of Strip Cutting Torch: The quantity of strip cutting torch in machine is determined by customer. Default configuration is 8 to 9 pieces for 3,200mm cutting span;
4) Operation: Interval between any two pieces of adjacent strip torches, which corresponds with width of cut out strip board (Flange and web of H Beam), can be adjusted freely by hand. Such interval can be varied among strip torches in one set of the strip Oxygen Fuel Flame Cutting Machine;
5) Function: Of all the strip cutting torches, one piece of the cutting torch is for horizontal direction cutting, to cut out finished length of strip plates; And the remaining torches are for simultaneous longitudinal way cutting, to cut out finished width of strip plates;
6) Standard Model: Standard model of machine is CG-4000, the machine has gantry rail span of 4000mm and the Max. cutting width of 3,200mm.
| Model of Strip Oxygen Fuel CNC Flame Cutter Machine | CG4000 |
| Cutting Rail Span | 4,000 mm |
| Effective Cutting Width Range | 80 ~ 3,200 mm |
| Standard Cutting Rail Length | 15,000 mm |
| Max. Cutting Length | 13,000 mm |
| Electric Control Manner | A.C. Relay |
| Drive for Gantry Movement | Single Drive (For 5,000mm and wider rail span should be double drive) |
| Quantity of Strip Cutting Torches | 9 sets |
| Min. to Max. Single Cutting Thickness | 6 ~ 150 mm (Special made for 200mm) |
| Min. to Max. Cutting Speed | 100 ~ 1000 mm/ min. A.C. inverter control |
1) Function: Triple flame cutting is niche product in family of thermal gas CNC Flame Cutting Machine, for cutting out slant welding groove on edges of carbon steel plate. It has similar function as Edge Milling Machine;
2) “Simple” Electric Control and Lower Producing Cost: Same as Strip Cutting Machine, the sole purpose Triple Cutting Machine does not need CNC controller and servo drive system, greatly reducing manufacturing cost of the machine;
3) Cutting Torch in Triple Oxygen Fuel Flame Cutting Machine is more complicated than that of single cutting CNC Flame Cutting Machine and Strip Cutting Machine: There are 3 pieces of single cutting torches in 1 group of triple cutting torch. Any one of the 3 single cutting torches can be applied individually;
4) In Practical Use, sole purpose Triple Cutting Machine is lesser seen than integrated function strip/ triple and CNC Flame Cutting Machine.
| Models of Triple Oxygen Fuel Flame CNC Cutting Machine | CG3000/ 4000/ 5000 |
| Flame Cutting Rail Span | 3,000/ 4,000 / 5,000 mm |
| Valid Max. Cutting Width | 2,200/ 3,200/ 4,200 mm |
| Flame Cutting Railway Length/ Max. Steel Plate Length | 15,000/ 13,000 mm |
| Drive for Gantry Movement | Double Drive |
| Min. to Max. Plate Beveling Thickness | 16 ~ 80 mm |
| Min. to Max. Single Cutting Thickness | 6 ~ 150 mm (Special made for 200mm) |
| Min. to Max. Beveling and Cutting Speed | 100 ~ 1000 mm/ min. VFD Drive |
| Triple Cutting Torch Quantity | 1~ 3 pieces |
| Type of Bevels Cut from Triple Flame | X/ Y/ K/ V grooves |
1. 1st Operation Plate Cut: As the indispensable machine tool in beginning process technology, CNC-CG4000 CNC Flame Cutting Machine with strip cutting is the 1st set of core equipment in Steel Structure production line:
1) H Beam Production Line;
2) T Beam Production Line;
3) BOX Beam Production Line;
4) Port Machinery Facility with Stiffener Plate Element Straightening Machine;
2. Similar Function Equipment: Triple Oxygen Fuel Flame Cutting Machine has similar function as Edge Milling Machine;
3. Reverse Equipment: Thermal gas CNC Flame Cutting Machine cut out steel plates into smaller sections, while Plate Butt Joint Welding Machine joint steel plates into larger ones by means of melt-thru butt welding.