Automatic fire adjusting device of numerical control flame cutting machine

Abstract

The utility model belongs to the technical field of cutting machines, and discloses an automatic fire adjusting device of a numerical control flame cutting machine, which at least comprises three gas paths and a cutting torch, hose output ends of the three gas paths are all connected with the cutting torch, the three gas paths are respectively a gas path, a preheating oxygen path and a cutting oxygen path, a gas proportional valve is connected onto the gas path, and the cutting oxygen path is connected with the cutting torch. A preheating oxygen proportional valve is connected to the preheating oxygen path, a cutting oxygen proportional valve is connected to the cutting oxygen path, the fuel gas proportional valve, the preheating oxygen proportional valve and the cutting oxygen proportional valve are electrically connected with a controller, and the controller is provided with a preset pressure signal value. And the controller controls and changes the output pressure of the gas proportional valve, the preheating oxygen proportional valve and the cutting oxygen proportional valve through a preset pressure signal value. According to the automatic fire adjusting device of the numerical control flame cutting machine, a pressure signal value is preset through the controller and information is transmitted to the proportional valves, the proportional valves drive the proportional electromagnets of the proportional valves to move the positions of the valve elements, and therefore the output pressure of the proportional valves is changed, and the automatic fire adjusting function of the cutting torch is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting machines, in particular to an automatic flame adjustment device for a numerically controlled flame cutting machine. Background Art

[0002] The CNC flame cutting machine uses a digital program to drive the movement of the machine tool. It is equipped with a flame cutting system and uses a CNC system to control the switch of the flame cutting system to cut metal materials such as steel plates.

[0003] When a CNC flame cutting machine is cutting, the flame shape of each torch must be adjusted promptly based on the thickness of the plate being cut, ensuring the proper temperature and straightness for optimal workpiece cutting. For example, when cutting thin plates, a soft flame and moderate temperature are required to prevent overburning and edge melting. When cutting thick plates, a "hard" flame is required, with a straight flame, a high oxygen content, and a high temperature, resulting in a short preheating time for the plate and a fast cutting speed.

[0004] The existing CNC flame cutting machine requires the operator to frequently manually adjust the torch flame to cut different plate thicknesses, which is time-consuming and labor-intensive, and has low operating efficiency. Therefore, it is urgent to design a new CNC flame cutting machine automatic flame adjustment device to improve the above problems. Utility Model Content

[0005] The utility model aims to provide an automatic flame adjustment device for a numerically controlled flame cutting machine, so as to solve the technical problem that an operator needs to frequently and manually adjust the flame of the cutting torch, which is time-consuming and labor-intensive and has low operating efficiency.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] An automatic flame adjustment device for a CNC flame cutting machine comprises at least three gas circuits and a cutting torch, wherein each gas circuit conveys gas through a hose, and the output ends of the hoses of the three gas circuits are all connected to the cutting torch;

[0008] Among them, the three gas circuits are respectively a fuel gas circuit, a preheating oxygen circuit and a cutting oxygen circuit. The fuel gas circuit is connected to a fuel gas proportional valve, the preheating oxygen circuit is connected to a preheating oxygen proportional valve, and the cutting oxygen circuit is connected to a cutting oxygen proportional valve. The fuel gas proportional valve, the preheating oxygen proportional valve and the cutting oxygen proportional valve are electrically connected to a controller, and the controller is provided with a preset pressure signal value. The controller controls and changes the output pressures of the fuel gas proportional valve, the preheating oxygen proportional valve and the cutting oxygen proportional valve through the preset pressure signal value.

[0009] As a preferred solution for the automatic flame adjustment device of the CNC flame cutting machine, the fuel gas circuit is further connected with a fuel gas solenoid valve, the preheating oxygen circuit is further connected with a preheating oxygen solenoid valve, and the cutting oxygen circuit is further connected with a cutting oxygen solenoid valve.

[0010] As a preferred solution for the automatic flame adjustment device of the CNC flame cutting machine, the fuel gas line is further connected with a fuel gas pressure reducing valve, the preheating oxygen line is further connected with a preheating oxygen pressure reducing valve, and the cutting oxygen line is further connected with a cutting oxygen pressure reducing valve.

[0011] As a preferred solution for the automatic flame adjustment device of a CNC flame cutting machine, the fuel gas circuit, the preheating oxygen circuit and the cutting oxygen circuit are respectively connected with pressure gauges.

[0012] As a preferred solution for the automatic flame adjustment device of a CNC flame cutting machine, the output ends of the fuel gas circuit, the preheating oxygen circuit and the cutting oxygen circuit are respectively connected to regulating hand valves.

[0013] As a preferred solution of the automatic flame adjustment device of the CNC flame cutting machine, the output ends of the fuel gas circuit, the preheating oxygen circuit and the cutting oxygen circuit are respectively connected to a flashback arrester.

[0014] As a preferred solution of the automatic flame adjustment device of the CNC flame cutting machine, the color of the hose of the fuel gas circuit is red, and the colors of the hoses of the preheating oxygen circuit and the cutting oxygen circuit are blue.

[0015] As a preferred solution of the automatic flame adjustment device for a CNC flame cutting machine, the automatic flame adjustment device for a CNC flame cutting machine further comprises a fixing frame, and the proportional valves and solenoid valves of each gas path are arranged up and down and fixed on the fixing frame.

[0016] As a preferred solution of the automatic flame adjustment device of the CNC flame cutting machine, a lifting assembly is provided outside the fixing frame, and a lifting end of the lifting assembly is connected to the cutting torch.

[0017] As a preferred solution of the automatic flame adjustment device of the CNC flame cutting machine, a lifting drag chain is provided between the fixing frame and the lifting assembly, and the hose of each gas path is provided in the lifting drag chain.

[0018] Beneficial effects of the utility model:

[0019] By adding a gas proportional valve to the fuel gas line, a preheating oxygen proportional valve to the preheating oxygen line, and a cutting oxygen proportional valve to the cutting oxygen line, the operator presets the pressure signal value through the controller according to the analog signal value of the required flame state and transmits the information to each proportional valve. The proportional valve drives its own proportional solenoid to move the valve core position, changing the output pressure of each proportional valve, thereby changing the gas flow in the hose, realizing the automatic flame adjustment function of the cutting torch and improving the automation level of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a gas circuit connection diagram of the automatic flame adjustment device of the CNC flame cutting machine provided by the embodiment of the utility model;

[0021] Figure 2 The utility model is a schematic diagram of the structure of the automatic flame adjustment device of the numerically controlled flame cutting machine provided by the embodiment of the present invention.

[0022] In the picture:

[0023] 1. Gas circuit; 11. Gas proportional valve; 12. Gas solenoid valve; 13. Gas pressure reducing valve;

[0024] 2. Preheating oxygen circuit; 21. Preheating oxygen proportional valve; 22. Preheating oxygen solenoid valve; 23. Preheating oxygen pressure reducing valve;

[0025] 3. Cutting oxygen circuit; 31. Cutting oxygen proportional valve; 32. Cutting oxygen solenoid valve; 33. Cutting oxygen pressure reducing valve;

[0026] 4. Cutting torch; 5. Pressure gauge; 6. Adjusting hand valve; 7. Backfire arrester; 8. Fixing bracket; 9. Lifting and drag chain. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0031] Combine Figure 1 and Figure 2 As shown, this embodiment provides an automatic flame adjustment device for a CNC flame cutting machine, which includes at least three gas circuits and a cutting torch 4. The three gas circuits are respectively a fuel gas circuit 1, a preheating oxygen circuit 2 and a cutting oxygen circuit 3. Each gas circuit transports gas through a hose. One end of the fuel gas circuit 1, the preheating oxygen circuit 2 and the cutting oxygen circuit 3 is an inlet end, and the other end is an output end. The output ends of the hoses of the three gas circuits are all connected to the cutting torch 4.

[0032] Among them, the gas proportional valve 11 is connected to the gas circuit 1, the preheating oxygen proportional valve 21 is connected to the preheating oxygen proportional valve 2, and the cutting oxygen proportional valve 31 is connected to the cutting oxygen proportional valve 31. The gas proportional valve 11, the preheating oxygen proportional valve 21 and the cutting oxygen proportional valve 31 are electrically connected to a controller, and the controller is provided with a preset pressure signal value. The controller controls and changes the output pressure of the gas proportional valve 11, the preheating oxygen proportional valve 21 and the cutting oxygen proportional valve 31 through the preset pressure signal value.

[0033] It can be understood that the operator presets the pressure signal value through the controller according to the analog signal value of the required flame state and transmits the information to each proportional valve. The proportional valve drives its own proportional solenoid to move the valve core position, changes the output pressure of each proportional valve, and thus changes the gas flow in the hose, realizing the automatic flame adjustment function of the cutting torch 4 and improving the degree of automation of the equipment.

[0034] In addition, a gas solenoid valve 12 is connected to the gas line 1, a preheating oxygen solenoid valve 22 is connected to the preheating oxygen line 2, and a cutting oxygen solenoid valve 32 is connected to the cutting oxygen line 3. By providing solenoid valves, the gas and oxygen supply during the flame cutting process can be precisely controlled, allowing adjustments to parameters such as cutting speed and cutting depth, thereby improving cutting quality and efficiency.

[0035] In addition, a gas pressure reducing valve 13 is connected to the fuel gas line 1, a preheating oxygen pressure reducing valve 23 is connected to the preheating oxygen line 2, and a cutting oxygen pressure reducing valve 33 is connected to the cutting oxygen line 3. These pressure reducing valves reduce the high-pressure gas to the pressure required by the cutting torch 4, thereby ensuring cutting quality and safety. Pressure gauges 5 are also connected to the fuel gas line 1, preheating oxygen line 2, and cutting oxygen line 3. These pressure gauges allow the operator to monitor the gas pressures and ensure a stable and safe cutting process.

[0036] Among them, the specific structures and principles of the proportional valve, solenoid valve and pressure reducing valve are all existing technologies, so they will not be further described here.

[0037] In order to further improve the controllability of the flame, such as Figure 1 As shown, the output ends of the fuel gas circuit 1, the preheating oxygen circuit 2 and the cutting oxygen circuit 3 are respectively connected to regulating hand valves 6. By setting the regulating hand valves 6, the regulating hand valves 6 can be adjusted and closed in time when leakage, equipment damage or other emergencies occur.

[0038] In addition, the output ends of the fuel gas line 1, preheating oxygen line 2, and cutting oxygen line 3 are each connected to a flashback arrester 7. The flashback arrester 7 prevents the cutting torch 4 from flashing back during welding or cutting, and prevents the flame from entering the acetylene generator and causing an explosion when the cutting torch 4 flashes back.

[0039] In this embodiment, the hose of the gas line 1 is red, while the hoses of the preheating oxygen line 2 and the cutting oxygen line 3 are blue. Distinguishing the gas line 1 from the preheating oxygen line 2 and the cutting oxygen line 3 through hose color facilitates inspection and maintenance. In other embodiments, the hose of the gas line 1 can also be green, orange, or black. This embodiment does not impose any specific restrictions on the colors of the hoses of the various lines; any color that allows for easy differentiation between the lines will suffice.

[0040] like Figure 2As shown, the automatic flame adjustment device for a CNC flame cutting machine of this embodiment also includes a mounting bracket 8. The proportional valves and solenoid valves for each gas circuit are arranged vertically and fixed to the mounting bracket 8. This facilitates inspection and maintenance by the operator and reduces entanglement between adjacent hoses, resulting in a more neat and reasonable layout. A lifting assembly is externally mounted on the mounting bracket 8. The lifting end of the lifting assembly is connected to the cutting torch 4, and the distance between the cutting torch 4 and the plate to be cut is adjusted by raising and lowering the lifting assembly.

[0041] Furthermore, a lifting drag chain 9 is provided between the fixed frame 8 and the lifting assembly, and the hoses of each air path are arranged in the lifting drag chain 9. The lifting drag chain 9 can protect and guide the hoses, and can protect the hoses from external damage such as extrusion or wear during the lifting and reciprocating motion.

[0042] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Automatic flame adjustment device of CNC flame cutting machine, characterized in that: It comprises at least three gas circuits and a cutting torch (4), each gas circuit conveys gas through a hose, and the hose output ends of the three gas circuits are all connected to the cutting torch (4); The three gas circuits are respectively a fuel gas circuit (1), a preheating oxygen circuit (2) and a cutting oxygen circuit (3); the fuel gas circuit (1) is connected to a fuel gas proportional valve (11); the preheating oxygen circuit (2) is connected to a preheating oxygen proportional valve (21); and the cutting oxygen circuit (3) is connected to a cutting oxygen proportional valve (31); the fuel gas proportional valve (11), the preheating oxygen proportional valve (21) and the cutting oxygen proportional valve (31) are electrically connected to a controller; the controller is provided with a preset pressure signal value; and the controller controls and changes the output pressures of the fuel gas proportional valve (11), the preheating oxygen proportional valve (21) and the cutting oxygen proportional valve (31) through the preset pressure signal value.

2. The automatic flame adjustment device of the CNC flame cutting machine according to claim 1, characterized in that: The fuel gas circuit (1) is also connected to a fuel gas solenoid valve (12), the preheating oxygen circuit (2) is also connected to a preheating oxygen solenoid valve (22), and the cutting oxygen circuit (3) is also connected to a cutting oxygen solenoid valve (32).

3. The automatic flame adjustment device of the CNC flame cutting machine according to claim 2, characterized in that: The fuel gas circuit (1) is further connected to a fuel gas pressure reducing valve (13), the preheating oxygen circuit (2) is further connected to a preheating oxygen pressure reducing valve (23), and the cutting oxygen circuit (3) is further connected to a cutting oxygen pressure reducing valve (33).

4. The automatic flame adjustment device for a CNC flame cutting machine according to any one of claims 1 to 3, characterized in that: The fuel gas circuit (1), the preheating oxygen circuit (2) and the cutting oxygen circuit (3) are respectively connected to pressure gauges (5).

5. The automatic flame adjustment device for a CNC flame cutting machine according to any one of claims 1 to 3, characterized in that: Output ends of the fuel gas circuit (1), the preheating oxygen circuit (2) and the cutting oxygen circuit (3) are respectively connected to regulating hand valves (6).

6. The automatic flame adjustment device for a CNC flame cutting machine according to any one of claims 1 to 3, characterized in that: The output ends of the fuel gas circuit (1), the preheating oxygen circuit (2) and the cutting oxygen circuit (3) are also respectively connected to a flashback preventer (7).

7. The automatic flame adjustment device for a CNC flame cutting machine according to any one of claims 1 to 3, characterized in that: The color of the hose of the fuel gas circuit (1) is red, and the colors of the hoses of the preheating oxygen circuit (2) and the cutting oxygen circuit (3) are blue.

8. The automatic flame adjustment device for a CNC flame cutting machine according to any one of claims 1 to 3, characterized in that: The automatic flame adjustment device of the numerically controlled flame cutting machine further comprises a fixing frame (8), and the proportional valves and electromagnetic valves of each gas path are arranged up and down and fixed on the fixing frame (8).

9. The automatic flame adjustment device for a CNC flame cutting machine according to claim 8, characterized in that: A lifting assembly is provided outside the fixing frame (8), and a lifting end of the lifting assembly is connected to the cutting torch (4).

10. The automatic flame adjustment device for a CNC flame cutting machine according to claim 9, characterized in that: A lifting drag chain (9) is provided between the fixing frame (8) and the lifting assembly, and the hoses of each gas path are provided in the lifting drag chain (9).

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