Method for preventing cutting nozzle from clogging for flame cutting machine

Abstract

The present invention relates to the field of flame cutting of steel plates, and specifically to a method for preventing the cutting nozzle from being blocked for a flame cutting machine. The method for preventing the cutting nozzle from being blocked for a flame cutting machine comprises: obtaining the height and angle of spatter in the preheating stage; determining the preheating lifting height according to the height and angle of spatter in the preheating stage, and the interval between the cutting nozzle and the workpiece is the sum of the preheating lifting height and the preheating basic interval; obtaining the height and angle of the perforation slag in the perforation stage; determining the perforation lifting height according to the height and angle of the perforation slag in the perforation stage, and the interval between the cutting nozzle and the workpiece is the sum of the perforation lifting height and the perforation basic interval. The method for preventing the cutting nozzle from being blocked for a flame cutting machine of the present invention can effectively prevent spatter and perforation slag from blocking the cutting nozzle under the premise of ensuring preheating perforation, greatly prolong the continuous cutting time of the cutting nozzle, and improve the efficiency of steel plate perforation.

Description

Technical Field

[0001] The invention relates to the field of steel plate flame cutting, and in particular to a cutting nozzle anti-blocking method for a flame cutting machine. Background Art

[0002] CNC flame cutting machine is a cutting device that uses digital program to drive the machine tool movement, equipped with flame cutting system, and uses CNC system to control the switch of flame cutting system to cut metal materials such as steel plates. CNC flame cutting machine has the ability to cut thick carbon steel and has low cutting cost, but it has large cutting deformation, low cutting accuracy, low cutting speed, long cutting preheating time and perforation time, and is difficult to adapt to the needs of fully automated operation. Therefore, the application occasions of CNC flame cutting machine are mainly limited to carbon steel and thick plate cutting.

[0003] The existing flame perforation process generally includes two steps: preheating and perforation. Among them, preheating includes two stages: low-temperature preheating and high-temperature preheating. Low-temperature preheating usually refers to heating the workpiece below 100°C before flame perforation. Its main purpose is to reduce the cooling rate of the workpiece during perforation, so that the workpiece after perforation is not prone to defects such as deformation and cracks. High-temperature preheating usually refers to heating the workpiece above 200°C before flame perforation. Its main function is to improve the fluidity of the molten pool and the perforation quality when the workpiece is perforated, thereby improving the perforation efficiency and processing quality. However, in the actual preheating and perforation process, preheating spatter and perforation slag can easily splash onto the cutting nozzle, or even enter the inside of the cutting nozzle, causing the cutting nozzle to become blocked and affecting the cutting wind line; at the same time, after the cutting nozzle is blocked, it is necessary to interrupt the perforation process, stop the machine and manually clean the cutting nozzle, affecting the perforation efficiency of the steel plate.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0005] In order to improve or solve the technical problem in the prior art that preheating spatter and perforation slag easily clog the cutting nozzle, the present invention provides a method for preventing the cutting nozzle from clogging for a flame cutting machine. The method for preventing the cutting nozzle from clogging for a flame cutting machine comprises: obtaining the height and angle of spatter in the preheating stage; determining the preheating lifting height according to the height and angle of spatter in the preheating stage, and the spacing between the cutting nozzle and the workpiece is the sum of the preheating lifting height and the preheating basic spacing; obtaining the height and angle of perforation slag in the perforation stage; determining the perforation lifting height according to the height and angle of perforation slag in the perforation stage, and the spacing between the cutting nozzle and the workpiece is the sum of the perforation lifting height and the perforation basic spacing.

[0006] In the method for preventing the cutting nozzle of a flame cutting machine of the present invention, the preheating lifting height is determined according to the height and angle of the spatters in the preheating stage, and the cutting nozzle is lifted on the basis of the preheating basic interval, which can effectively prevent the spatters from clogging the cutting nozzle while ensuring the preheating effect. The perforation lifting height is determined according to the height and angle of the perforation slag in the perforation stage, and the cutting nozzle is lifted on the basis of the perforation basic interval, which can effectively prevent the perforation slag from clogging the cutting nozzle while ensuring the perforation effect. Through the above-mentioned settings, the method for preventing the cutting nozzle of a flame cutting machine of the present invention can effectively prevent the spatters and perforation slag from clogging the cutting nozzle while ensuring the preheating perforation, greatly prolong the continuous cutting time of the cutting nozzle, improve the steel plate perforation efficiency, and is suitable for fully automatic intelligent perforation cutting projects.

[0007] In the preferred technical solution of the above-mentioned method for preventing the cutting nozzle of a flame cutting machine from being blocked, the preheating stage includes a high preheating stage, and the preheating lifting height in the high preheating stage increases with the thickness of the workpiece. Through the above-mentioned setting, the preheating lifting height increases with the thickness of the workpiece, thereby preventing the cutting nozzle from being blocked by spatter in the high preheating stage.

[0008] In the preferred technical solution of the above-mentioned method for preventing the cutting nozzle of a flame cutting machine from being blocked, the preheating lifting height corresponding to the workpiece with a thickness of 80 mm is 2 mm; the preheating lifting height corresponding to the workpiece with a thickness of 120 mm is 4 mm.

[0009] In the preferred technical solution of the above-mentioned method for preventing the cutting nozzle of a flame cutting machine from being blocked, the preheating stage includes a low preheating stage, and the preheating lifting height in the low preheating stage is 0 mm. No spatter is generated in the low preheating stage, so lifting is not required.

[0010] In the preferred technical solution of the above-mentioned method for preventing the cutting nozzle of a flame cutting machine from being blocked, the perforation lifting height in the perforation stage increases with the increase of the perforation depth. Through the above-mentioned setting, the deeper the perforation depth, the higher the height of the perforation slag, and the closer the angle is to the cutting nozzle, increasing the perforation lifting height can effectively prevent the perforation slag from blocking the cutting nozzle.

[0011] In the preferred technical solution of the above-mentioned method for preventing the cutting nozzle of a flame cutting machine from being blocked, the preheating basic interval is 8 mm, and the perforation basic interval is the sum of the preheating basic interval and the preheating lifting height.

[0012] In the preferred technical solution of the above-mentioned method for preventing the cutting nozzle of a flame cutting machine from being blocked, the perforation depth includes at least a first perforation range and a second perforation range; the perforation lifting height in the perforation stage includes at least a first lifting height and a second lifting height, the first lifting height matches the first perforation range; the second lifting height matches the second perforation range. Through the above-mentioned settings, different perforation depths correspond to different lifting heights, thereby effectively preventing the perforation slag from blocking the cutting nozzle.

[0013] In the preferred technical solution of the above-mentioned method for preventing the cutting nozzle of a flame cutting machine from being blocked, the first perforation range is 0mm-20mm, and the second perforation range is 20mm-40mm; the first lifting height is 2mm, and the second lifting height is 4mm; in the first perforation range, the interval between the cutting nozzle and the workpiece is the sum of the preheating basic interval, the preheating lifting height, and the first lifting height; in the second perforation range, the interval between the cutting nozzle and the workpiece is the sum of the preheating basic interval, the preheating lifting height, the first lifting height, and the second lifting height.

[0014] In the preferred technical solution of the above-mentioned method for preventing the cutting nozzle from being blocked by a flame cutting machine, the perforation depth also includes a third perforation range; the perforation lifting height in the perforation stage also includes a third lifting height, and the third lifting height matches the third perforation range. Through the above-mentioned setting and the arrangement of the third perforation depth, the method can be applied to thicker workpieces, thereby improving the scope of application of the method.

[0015] In the preferred technical solution of the above-mentioned method for preventing the cutting nozzle from being blocked by a flame cutting machine, the third perforation range is 40-80 mm, and the third lifting height is 4 mm; in the third perforation range, the interval between the cutting nozzle and the workpiece is the sum of the preheating basic interval, the preheating lifting height, the first lifting height, the second lifting height, and the third lifting height.

[0016] It can be seen from the above technical solutions that the beneficial effects of the present invention are:

[0017] The preheating lifting height is determined according to the height and angle of the spatters in the preheating stage, and the cutting nozzle is lifted on the basis of the preheating basic interval, which can effectively prevent the spatters from clogging the cutting nozzle while ensuring the preheating effect. The perforation lifting height is determined according to the height and angle of the perforation slag in the perforation stage, and the cutting nozzle is lifted on the basis of the perforation basic interval, which can effectively prevent the perforation slag from clogging the cutting nozzle while ensuring the perforation effect. Through the above-mentioned settings, the cutting nozzle anti-clogging method for a flame cutting machine of the present invention can effectively prevent spatters and perforation slag from clogging the cutting nozzle while ensuring preheating perforation, greatly prolonging the continuous cutting time of the cutting nozzle, improving the efficiency of steel plate perforation, and is suitable for fully automatic intelligent perforation cutting projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0019] Figure 1 The present invention is a flow chart of a method for preventing the cutting nozzle of a flame cutting machine from being blocked.

[0020] Figure 2 It is a schematic diagram of the height and angle of spatter and perforation slag in the cutting nozzle anti-clogging method for a flame cutting machine of the present invention.

[0021] Figure 3 It is a schematic diagram of the corresponding relationship between the workpiece thickness and the cutting nozzle height in the low preheating stage in the cutting nozzle anti-clogging method for a flame cutting machine of the present invention.

[0022] Figure 4 It is a schematic diagram of the corresponding relationship between the workpiece thickness and the cutting nozzle height in the high preheating stage in the cutting nozzle anti-clogging method for a flame cutting machine of the present invention.

[0023] Figure 5 It is a schematic diagram of the cutting nozzle height at different stages of a workpiece with a thickness of 80 mm in the cutting nozzle anti-clogging method for a flame cutting machine according to the present invention.

[0024] List of reference numerals: 1. cutting gun; 11. cutting nozzle; 2. spatter; 3. piercing slag; 4. workpiece. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0026] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In order to improve or solve the technical problem in the prior art that the preheating spatter 2 and the perforation slag 3 are easy to block the cutting nozzle 11, the present invention provides a method for preventing the cutting nozzle from being blocked for a flame cutting machine. The method for preventing the cutting nozzle from being blocked for a flame cutting machine comprises: obtaining the height and angle of the spatter 2 in the preheating stage; determining the preheating lifting height according to the height and angle of the spatter 2 in the preheating stage, and the interval between the cutting nozzle 11 and the workpiece 4 is the sum of the preheating lifting height and the preheating basic interval; obtaining the height and angle of the perforation slag 3 in the perforation stage; determining the perforation lifting height according to the height and angle of the perforation slag 3 in the perforation stage, and the interval between the cutting nozzle 11 and the workpiece 4 is the sum of the perforation lifting height and the perforation basic interval.

[0029] Figure 1 It is a flow chart of the method for preventing the cutting nozzle of a flame cutting machine from being blocked according to the present invention. Figure 2 The figure is a schematic diagram of the height and angle of the spatter and the perforation slag in the method for preventing the cutting nozzle from being blocked for a flame cutting machine according to the present invention. Figure 1 and Figure 2 As shown, in one or more embodiments, the method for preventing the cutting nozzle of a flame cutting machine of the present invention includes:

[0030] Step S1, obtaining the height and angle of the splash 2 in the preheating stage; wherein the height and angle of the splash 2 in the preheating stage can be obtained by an industrial camera.

[0031] Step S2, determine the preheating lifting height according to the height and angle of the spatter 2, and the interval between the cutting nozzle 11 and the workpiece 4 is the sum of the preheating lifting height and the preheating reference interval; wherein the preheating reference interval is a system preset interval, which is generally 8mm. The cutting nozzle 11 is arranged at the end of the cutting gun 1, and the cutting gun 1 is connected to the lifting mechanism to drive the cutting gun 1 to approach or move away from the workpiece 4.

[0032] Step S3, obtaining the height and angle of the perforated slag 3 during the perforation stage; wherein the height and angle of the perforated slag 3 during the perforation stage can be obtained by an industrial camera.

[0033] Step S4, determine the perforation lifting height according to the height and angle of the perforation slag 3 in the perforation stage, and the interval between the cutting nozzle 11 and the workpiece 4 is the sum of the perforation lifting height and the perforation basic interval; wherein the perforation basic interval is the sum of the preheating basic interval and the preheating lifting height.

[0034] Figure 3 It is a schematic diagram of the corresponding relationship between the thickness of the workpiece and the height of the cutting nozzle in the low preheating stage in the cutting nozzle anti-clogging method for the flame cutting machine of the present invention. Figure 4 The figure is a schematic diagram of the corresponding relationship between the workpiece thickness and the cutting nozzle height in the high preheating stage of the cutting nozzle anti-clogging method for a flame cutting machine according to the present invention. Figure 2 , Figure 3 and Figure 4 As shown, in one or more embodiments, the preheating stage includes a low preheating stage and a high preheating stage. The workpiece 4 is processed in the low preheating stage, the high preheating stage and the perforation stage in sequence. Further, in the low preheating stage, the preheating lifting height is 0mm. That is, when the thickness of the workpiece 4 is within the range of 40mm-120mm, the interval between the cutting nozzle 11 and the workpiece 4 is the preheating basic interval, that is, 8mm. Further, in the high preheating stage, the preheating lifting height increases as the thickness of the workpiece 4 increases. Exemplarily, when the thickness of the workpiece 4 is 40 mm, the preheating lifting height is 0 mm, and the distance between the cutting nozzle 11 and the workpiece 4 is the preheating basic distance; when the thickness of the workpiece 4 is 60 mm, the preheating lifting height is 1 mm, and the distance between the cutting nozzle 11 and the workpiece 4 is 9 mm; when the thickness of the workpiece 4 is 80 mm, the preheating lifting height is 2 mm, and the distance between the cutting nozzle 11 and the workpiece 4 is 10 mm; when the thickness of the workpiece 4 is 100 mm, the preheating lifting height is 3 mm, and the distance between the cutting nozzle 11 and the workpiece 4 is 11 mm; when the thickness of the workpiece 4 is 120 mm, the preheating lifting height is 4 mm, and the distance between the cutting nozzle 11 and the workpiece 4 is 12 mm.

[0035] Figure 5 Schematic diagram of the cutting nozzle height of a workpiece with a thickness of 80 mm at different stages in the method for preventing the cutting nozzle from being blocked by a flame cutting machine according to the present invention. Figure 2 and Figure 5As shown, in one or more embodiments, the perforation lifting height increases with the increase of the perforation depth during the perforation stage. It is understandable that the greater the perforation depth, the higher the height of the perforation slag 3, and the closer the angle is to the central axis of the perforation. Specifically, the perforation depth includes at least the first perforation range and the second perforation range; the perforation lifting height includes at least the first lifting height and the second lifting height, the first lifting height matches the first perforation range, and the second perforation depth matches the second perforation range. Exemplarily, the first perforation range is 0mm-20mm, and the second perforation range is 20mm-40mm. The first lifting height is 2mm, and the second lifting height is 4mm. When the perforation depth is in the first perforation range, the interval between the cutting nozzle 11 and the workpiece 4 is the sum of the perforation basic interval and the first lifting height. Among them, the perforation basic interval is the sum of the preheating basic interval and the preheating lifting height. That is, when the perforation depth is in the first perforation range, the interval between the cutting nozzle 11 and the workpiece 4 is the sum of the preheating basic interval, the preheating lifting height and the first lifting height. When the perforation depth is in the second perforation range, the distance between the cutting nozzle 11 and the workpiece 4 is the sum of the basic perforation distance, the first lifting height and the second lifting height. That is, when the perforation depth is in the second perforation range, the distance between the cutting nozzle 11 and the workpiece 4 is the sum of the preheating basic distance, the preheating lifting height, the first lifting height and the second lifting height. When the thickness of the workpiece 4 is 40mm, the first perforation range and the second perforation range can complete the perforation of the workpiece 4. Furthermore, the perforation depth also includes the third perforation range, and the perforation lifting height in the perforation stage also includes the third lifting height, and the third lifting height matches the third perforation range. Specifically, the third perforation range is 40mm-80mm, and the third lifting height is 4mm. When the perforation depth is in the third perforation range, the distance between the cutting nozzle 11 and the workpiece 4 is the sum of the preheating basic distance, the preheating lifting height, the first lifting height, the second lifting height and the third lifting height. For example, taking a workpiece 4 with a thickness of 80 mm as an example, in the low preheating stage, the distance between the cutting nozzle 11 and the workpiece 4 is 8 mm; in the high preheating stage, the distance between the cutting nozzle 11 and the workpiece 4 is 10 mm; when the perforation depth is in the first perforation range, the distance between the cutting nozzle 11 and the workpiece 4 is 12 mm; when the perforation depth is in the second perforation range, the distance between the cutting nozzle 11 and the workpiece 4 is 16 mm; when the perforation depth is in the third perforation range, the distance between the cutting nozzle 11 and the workpiece 4 is 20 mm, and the perforation is completed at this time. It can be understood that as the perforation depth increases, the air pressure at the cutting nozzle 11 increases accordingly to ensure that the perforation is completed; wherein, when the perforation depth is in the first perforation range, the air pressure is in a low pressure state; when the perforation depth is in the second perforation range, the air pressure is in a medium pressure state; when the perforation depth is in the third perforation range, the air pressure is in a high pressure state.

[0036] The cutting nozzle anti-clogging method for a flame cutting machine of the present invention can effectively prevent spatter 2 and perforation slag 3 from clogging the cutting nozzle 11 under the premise of ensuring preheating and perforation, greatly prolong the continuous cutting time of the cutting nozzle 11, and improve the steel plate perforation efficiency, and is suitable for fully automatic intelligent perforation and cutting projects.

[0037] So far, the technical scheme of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical schemes after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for preventing the cutting nozzle of a flame cutting machine from being blocked, characterized in that: include: Obtaining the height and angle of the splash (2) during the preheating stage; The preheating lifting height is determined according to the height and angle of the spatter (2) in the preheating stage, and the distance between the cutting nozzle (11) and the workpiece (4) is the sum of the preheating lifting height and the preheating basic distance; Obtaining the height and angle of the perforation slag return (3) during the perforation stage; The perforation lifting height is determined according to the height and angle of the perforation slag return (3) during the perforation stage, and the interval between the cutting nozzle (11) and the workpiece (4) is the sum of the perforation lifting height and the perforation base interval; The preheating stage includes a high preheating stage, in which the preheating lifting height increases as the thickness of the workpiece (4) increases; The preheating stage includes a low preheating stage, and the preheating lifting height in the low preheating stage is 0 mm; In the perforation stage, the perforation lifting height increases with the increase of the perforation depth; The preheating basic interval is 8 mm, and the perforation basic interval is the sum of the preheating basic interval and the preheating lifting height; The perforation depth includes at least a first perforation range and a second perforation range; the perforation lifting height in the perforation stage includes at least a first lifting height and a second lifting height, the first lifting height matches the first perforation range; the second lifting height matches the second perforation range; The first perforation range is 0mm-20mm, and the second perforation range is 20mm-40mm; the first lifting height is 2mm, and the second lifting height is 4mm; in the first perforation range, the distance between the cutting nozzle (11) and the workpiece (4) is the sum of the preheating basic distance, the preheating lifting height, and the first lifting height; in the second perforation range, the distance between the cutting nozzle (11) and the workpiece (4) is the sum of the preheating basic distance, the preheating lifting height, the first lifting height, and the second lifting height.

2. The method for preventing the cutting nozzle of a flame cutting machine from being blocked according to claim 1, characterized in that: The preheating lifting height corresponding to the workpiece (4) with a thickness of 80 mm is 2 mm; the preheating lifting height corresponding to the workpiece (4) with a thickness of 120 mm is 4 mm.

3. The method for preventing the cutting nozzle of a flame cutting machine from being blocked according to claim 1, characterized in that: The perforation depth also includes a third perforation range; the perforation lifting height in the perforation stage also includes a third lifting height, and the third lifting height matches the third perforation range.

4. The method for preventing the cutting nozzle of a flame cutting machine from being blocked according to claim 3, characterized in that: The third perforation range is 40-80 mm, and the third lifting height is 4 mm; in the third perforation range, the distance between the cutting nozzle (11) and the workpiece (4) is the sum of the preheating basic distance, the preheating lifting height, the first lifting height, the second lifting height, and the third lifting height.

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