High-precision welding numerical control machine tool

Abstract

The invention discloses a high-precision welding numerical control machine tool, which belongs to the technical field of welding, and comprises a welding assembly, a truss assembly and a welding control system, the welding control system comprises a prediction unit used for generating a welding seam width abnormity risk index and a judgment module used for judging the risk of welding seam width abnormity of the current welding seam width. The welding speed analysis unit is used for generating a welding speed adjusting value; the moving speed adjusting module is used for adjusting the moving speed of the welding assembly according to the welding speed adjusting value; the welding speed analysis model is established through the welding speed analysis unit, the moving speed of the welding assembly is dynamically adjusted, the accurate control mode effectively solves the problem that in the prior art, welding seam width control is not stable, and the welding quality and the production efficiency are remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of welding, and particularly relates to a high-precision welding numerical control machine tool. Background Art

[0002] Welding technology is an indispensable part of modern manufacturing, and is widely used in many fields such as automobile manufacturing, aerospace, and shipbuilding. Welding connects metals or other thermoplastic materials together by heating and melting them to form a strong joint. With the progress of technology, welding technology has been continuously developed, from traditional arc welding and gas welding to modern laser welding and electron beam welding, etc., and the welding efficiency and precision have been continuously improved.

[0003] In the existing welding technology, especially the development of automation and numerical control welding technology, the welding process has become more precise and efficient. However, despite the significant progress made by the existing technology, there are still many challenges in the field of high-precision welding. For example, in the welding process of traditional welding numerical control machine tools, it is difficult to real-time sense the state changes of welded parts, such as surface temperature, molten pool depth, etc., resulting in inaccurate control of the weld width and affecting the welding quality. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the present invention provides a high-precision welding numerical control machine tool to solve the above problems.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: A high-precision welding numerical control machine tool includes a welding component and a base, and the machine tool further includes: A truss component, which is connected to the welding component and is used to move the position of the welding component; A welding control system, which is communicatively connected to the control end of the truss component and is used to accurately control the moving speed of the welding component; Wherein, the welding control system specifically includes: A prediction unit, which is used to obtain the state data of the welded part and generate a weld width abnormal risk index; wherein, the state data includes surface temperature, molten pool depth, and the current weld width evaluation value; the current weld width evaluation value refers to the ratio of the current weld width to the standard weld width; the surface temperature refers to the surface temperature on both sides of the preset weld on the welded part; A judgment module, which is used to judge the risk of abnormal current weld width according to the weld width abnormal risk index; A welding speed analysis unit, which is used to obtain the current moving speed of the welding component, establish a welding speed analysis model, and generate a welding speed adjustment value; A moving speed adjustment module, which is communicatively connected to the control end of the truss assembly and is used to adjust the moving speed of the welding assembly according to the welding speed adjustment value.

[0006] Based on the above technical solutions, the present invention also provides the following alternative technical solutions: Further technical solution: The truss assembly specifically includes: A bracket, which is fixedly arranged on one side of the base; A moving frame, which is slidably connected to the bracket through a groove formed in the bracket; A first threaded rod, which is threadedly connected to the moving frame, and both ends of the first threaded rod are rotatably connected to the bracket.

[0007] Further technical solution: The welding assembly further includes: A welding medium supply member, which is fixedly arranged on the moving frame; A welding head, which is slidably arranged on one side of the above; A medium transmission pipeline, one end of which is connected to the welding medium supply member and the other end of which is connected to the welding head; A fourth threaded rod, which is threadedly connected to the welding head, and both ends of the fourth threaded rod are rotatably connected to the moving frame.

[0008] Further technical solution: The prediction unit specifically includes: A temperature analysis module, which is used to obtain the surface temperature of the welded part and generate a heat-affected zone prediction index; A molten pool analysis module, which is used to obtain the molten pool depth and generate a molten pool depth prediction index; A risk analysis module, which is used to establish a risk analysis model according to the weld deviation index and the current weld width evaluation value, substitute the heat-affected zone prediction index and the molten pool depth prediction index into the risk analysis model, and generate a weld width abnormal risk index; the weld deviation index refers to the ratio of the difference between the current molten pool position and the preset weld position to the preset weld position.

[0009] Further technical solution: The temperature analysis module specifically includes: A temperature change analysis sub-module, which is used to generate the surface temperature change speed according to the historical surface temperature value of the welded part and the temperature change time point; A heat-affected time analysis sub-module, which is used to obtain the heat-affected zone of the welded part by the current welding assembly, the welding point position and the welding point moving speed, and generate the remaining value of the heat-affected time; The final temperature analysis sub-module is used to generate a final temperature prediction value according to the surface temperature change rate and the remaining value of the thermal influence time; The thermal influence area prediction index generation sub-module is used to generate a thermal influence area prediction index according to the final temperature prediction value and the minimum value of the standard melting point temperature of the welded part.

[0010] Further technical solution: The molten pool analysis module specifically includes: The depth change analysis sub-module is used to generate a molten pool depth change rate according to the historical molten pool depth of the welded part and the depth change time point; The final molten pool depth analysis sub-module is used to obtain the remaining value of the thermal influence time and generate a final molten pool depth prediction value; The molten pool depth prediction index generation sub-module is used to generate a molten pool depth prediction index according to the final molten pool depth prediction value and the standard molten pool depth.

[0011] Further technical solution: The welding speed analysis unit specifically includes: The moving speed acquisition module is used to acquire the current moving speed of the welding assembly; The adjustment analysis module is used to establish a welding speed analysis model according to the environmental temperature evaluation value and the weld width abnormal risk index, and generate a welding speed adjustment value; the environmental temperature evaluation value refers to the ratio between the current environmental temperature value and the standard working condition temperature.

[0012] The present invention provides a high-precision welding numerical control machine tool, which has the following beneficial effects compared with the prior art: By integrating an advanced welding control system, the present invention realizes the real-time perception and analysis of the state data of the welded part; the prediction unit in the welding control system can accurately obtain the surface temperature, molten pool depth and current weld width evaluation value of the welded part, and generate a weld width abnormal risk index based on these data; the judgment module then judges whether there is an abnormal risk in the current weld width in real time according to the weld width abnormal risk index, and establishes a welding speed analysis model through the welding speed analysis unit to dynamically adjust the moving speed of the welding assembly. This precise control method effectively solves the problem of unstable weld width control in the prior art, and significantly improves the welding quality and production efficiency. At the same time, the present invention also considers the influence of the environmental temperature on the welding process, and further improves the stability and adaptability of the welding process by introducing the environmental temperature evaluation value. Brief Description of the Drawings

[0013] Figure 1 It is a three-dimensional structure schematic diagram of a high-precision welding numerical control machine tool provided by an embodiment of the present invention.

[0014] Figure 2 It is a structure schematic diagram of a welding assembly provided by an embodiment of the present invention.

[0015] Figure 3 This is a schematic structural diagram of the clamping assembly provided by an embodiment of the present invention.

[0016] Figure 4 This is a schematic structural diagram of the welding control system provided by an embodiment of the present invention.

[0017] Annotation of reference numerals in the drawings: 1, base; 2, truss assembly; 3, clamping assembly; 4, welding assembly; 5, welding control system; 201, bracket; 202, moving frame; 203, first threaded rod; 301, lower clamping member; 302, upper clamping member; 303, second threaded rod; 304, third threaded rod; 401, welding medium supply member; 402, welding head; 403, medium transmission pipeline; 404, fourth threaded rod. Detailed implementation manners

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0020] Please refer to Figure 1 and Figure 4 , a high-precision welding numerical control machine tool provided by an embodiment of the present invention, includes a base 1 and a welding assembly 4; the machine tool further includes: A truss assembly 2, which is connected to the welding assembly 4 and is used to move the position of the welding assembly 4; A clamping assembly 3, which is connected to the base 1 and is used to maintain the stability of the welded part; A welding control system 5, which is communicatively connected to the control end of the truss assembly 2 and is used to accurately control the moving speed of the welding assembly 4; Among them, the welding control system 5 specifically includes: A prediction unit 10, which is used to obtain the state data of the welded part and generate a risk index of abnormal weld width; among them, the state data includes the surface temperature, the molten pool depth, and the current weld width evaluation value; the current weld width evaluation value refers to the ratio of the current weld width to the standard weld width; the surface temperature refers to the surface temperature on both sides of the preset weld on the welded part; A judgment module 20, which is used to judge the risk of abnormal current weld width according to the risk index of abnormal weld width; The welding speed analysis unit 30 is used to obtain the current moving speed of the welding assembly 4, establish a welding speed analysis model, and generate a welding speed adjustment value; The moving speed adjustment module 40 is communicatively connected to the control end of the truss assembly 2 and is used to adjust the moving speed of the welding assembly 4 according to the welding speed adjustment value.

[0021] Please refer to Figure 1 , as a preferred embodiment of the present invention, the truss assembly 2 specifically includes: The bracket 201 is fixedly arranged on one side of the base 1; The moving frame 202 is slidably connected to the bracket 201 through a groove formed in the bracket 201; The first threaded rod 203 is threadedly connected to the moving frame 202, and both ends of the first threaded rod 203 are rotatably connected to the bracket 201; Specifically, a servo motor drives the first threaded rod 203 to rotate, and the first threaded rod 203 drives the moving frame 202 to perform a linear motion along the groove formed in the bracket 201, so that the moving frame 202 drives the welding assembly 4 to perform a linear motion, realizing the lateral movement of the welding assembly 4.

[0022] Please refer to Figure 2 , as a preferred embodiment of the present invention, the welding assembly 4 further includes: The welding medium supply part 401 is fixedly arranged on the moving frame 202; The welding head 402 is slidably arranged on the moving frame 202; The medium transmission pipeline 403, one end of the medium transmission pipeline 403 is connected to the welding medium supply part 401 and the other end of the medium transmission pipeline 403 is connected to the welding head 402; The fourth threaded rod 404 is threadedly connected to the welding head 402, and both ends of the fourth threaded rod 404 are rotatably connected to the moving frame 202; Specifically, a reciprocating motor drives the fourth threaded rod 404 to rotate, and the fourth threaded rod 404 drives the welding head 402 to perform a linear motion along the chute formed in the moving frame 202, realizing the longitudinal movement of the moving frame 202; In this embodiment, if the welding medium supply member 401 is disposed at the central position of the moving frame 202, the length of the medium transmission pipe 403 is at least half of the maximum length of the moving frame 202 to ensure that the medium transmission pipe 403 can transmit the medium when the welding head 402 moves longitudinally. In addition, there are many welding methods, such as gas welding, resistance welding, etc.; the welding method of the welding assembly 4 in the present invention can also be gas welding or resistance welding; taking gas welding as an example, the welding medium supply member 401 can be a gas storage tank, the medium transmission pipe 403 is a gas transmission pipe, and the welding head 402 is a gas welding head.

[0023] Please refer to Figure 1 and Figure 3 , as a preferred embodiment of the present invention, the clamping assembly 3 specifically includes: A lower clamping member 301, which is slidably disposed on the base 1 through a slideway formed on the base 1. An upper clamping member 302, which is slidably disposed on the lower clamping member 301. A second threaded rod 303, which is threadedly connected to the lower clamping member 301, and both ends of the second threaded rod 303 are rotatably connected to the base 1. A third threaded rod 304, one end of which is rotatably connected to the lower clamping member 301, and the third threaded rod 304 is threadedly connected to the upper clamping member 302. Specifically, by rotating the third threaded rod 304, the third threaded rod 304 drives the upper clamping member 302 to perform a linear motion, so that the distance between the upper clamping member 302 and the lower clamping member 301 is changed, thereby realizing the clamping of the welding piece and preventing the welding piece from being displaced during welding; in addition, by rotating the second threaded rod 303, the second threaded rod 303 drives the lower clamping member 301 to perform a linear motion, and the lower clamping member 301 drives the upper clamping member 302 and the third threaded rod 304 to perform a linear motion, thereby driving the welding piece to perform a linear motion and adjusting the distance between the welding pieces so that the welding pieces can be welded. In this embodiment, the clamping force on the welding piece can be set according to the surface state of the welding piece, and the surface state includes the deformation value of the welding piece, the shaking floating of the welding piece, and the resistance of moving the welding piece, etc.; in addition, the distance between the welding pieces needs to be set according to the welding requirements. In addition, a support member can be disposed on one side of the clamping assembly 3 to support the welding piece to prevent the welding piece from being damaged due to its own gravity or other reasons.

[0024] As a preferred embodiment of the present invention, the prediction unit specifically includes: A temperature analysis module, configured to obtain the surface temperature of a welded part and generate a heat-affected zone prediction index; It should be noted that the surface temperature of the welded part refers to the surface temperature values of both sides of the weld seam in the area where the welding point is located; A molten pool analysis module, configured to obtain the molten pool depth and generate a molten pool depth prediction index; A risk analysis module, configured to establish a risk analysis model, substitute the heat-affected zone prediction index and the molten pool depth prediction index into the risk analysis model, and generate a weld width anomaly risk index; Wherein, the expression of the risk analysis model is: ; In the expression, K represents the weld width anomaly risk index, represents the heat-affected zone prediction index, represents the molten pool depth prediction index, represents the weld deviation index, represents the current weld width evaluation value, α and β are both weight coefficients, and α + β = 1; the weld deviation index refers to the ratio of the difference between the current molten pool position and the preset weld position to the preset weld position; It should be noted that α and β are set values, and the ways of their values include the expert consultation method, the analytic hierarchy process, etc.; In this embodiment, during the actual welding process on both sides of the preset weld on the welded part, during the data acquisition process, the surface temperature obtained may include the molten pool temperature due to the deviation of the weld position; In addition, the current molten pool position and the preset weld position are numerical data. By performing grid management on the surface of the welded part, according to the position of the molten pool in the grid and the position of the preset weld on the grid, the current molten pool position and the preset weld position are converted into numerical data.

[0025] As a preferred embodiment of the present invention, the temperature analysis module specifically includes: A temperature change analysis sub-module, configured to generate a surface temperature change speed according to the historical surface temperature values of the welded part and the temperature change time points; It should be noted that in this embodiment, the surface temperature change speed is an average value, that is, the average value of all surface temperature change speeds in the historical data; A heat-affected time analysis sub-module, configured to obtain the heat-affected zone, the welding point position and the welding point movement speed of the current welding assembly 4 on the welded part, and generate a remaining heat-affected time value; It should be noted that the welding point movement speed refers to the movement speed of the welding point when the welding assembly 4 welds the welded part; The final temperature analysis sub-module is used to generate a predicted final temperature value according to the surface temperature change rate and the remaining value of the heat influence time; The heat affected zone prediction index generation sub-module is used to generate a heat affected zone prediction index according to the predicted final temperature value and the minimum value of the standard melting point temperature of the welded part; Among them, the generation method of the heat affected zone prediction index is specifically as follows: Through the formula: ; Generate the heat affected zone prediction index ; In the formula, represents the predicted final temperature value, represents the minimum value of the standard melting point temperature of the welded part; It should be explained that the minimum value of the standard melting point temperature of the welded part refers to the lowest temperature value that can liquefy the standard welded part; in addition, the minimum value of the standard melting point temperature of the welded part is a set value, and the specific value needs to be set according to factors such as the material of the welded part.

[0026] As a preferred embodiment of the present invention, the generation method of the predicted final temperature value is specifically as follows: Through the formula: ; Generate the predicted final temperature value ; In the formula, represents the current surface temperature, represents the surface temperature change rate, and t represents the remaining value of the heat influence time.

[0027] As a preferred embodiment of the present invention, the generation method of the remaining value of the heat influence time is specifically as follows: According to the current welding strength of the welding assembly 4, obtain the welding heat affected zone; It should be explained that the current welding strength of the welding assembly 4 refers to the strength of the welding method used by the welding assembly 4; for example, if the welding method is laser welding, the current welding strength of the welding assembly 4 refers to the laser intensity; In this embodiment, the welding heat affected zone refers to the area affected by the heat dissipated by the current welding strength of the welding assembly 4 on both sides of the weld on the welded part; in the standard working condition, the temperature in this area should be in a state where it has not reached the melting point temperature of the welded part, that is, no molten pool is formed; In addition, the welding heat affected zone is generated based on the current welding strength of the welding component 4 and the heat transfer coefficient of the welded part. Specifically, the welding heat affected zone can be calculated by a linear regression equation. This technology is an existing technology and will not be elaborated here. Obtain the edge position of the welding heat affected zone and the position of the welding point, generate the distance value of the welding point from the edge position of the current welding heat affected zone, and mark it as the edge distance value. Generate the required arrival time, that is, the remaining value of the heat affected time, according to the edge distance value and the moving speed of the welding point; the required arrival time refers to the ratio between the edge distance value and the moving speed of the welding point. It should be explained that when the welding point moves, multiple welding heat affected zones will be formed. It is necessary to analyze according to the position of each welding heat affected zone and the current welding point respectively, that is, the position of each welding heat affected zone remains unchanged until the welding point leaves the welding heat affected zone.

[0028] As a preferred embodiment of the present invention, the molten pool analysis module specifically includes: A depth change analysis sub-module for generating the molten pool depth change speed according to the historical molten pool depth of the welded part and the depth change time point. It should be explained that in this embodiment, the molten pool depth change speed is an average value, that is, the average value of all molten pool depth change speeds in the historical data. A final molten pool depth analysis sub-module for obtaining the remaining value of the heat affected time and generating a predicted value of the final molten pool depth. A molten pool depth prediction index generation sub-module for generating a molten pool depth prediction index according to the predicted value of the final molten pool depth and the standard molten pool depth. Among them, the generation method of the molten pool depth prediction index is specifically as follows: Through the formula: ; Generate the molten pool depth prediction index ; In the formula, represents the predicted value of the final molten pool depth, represents the standard molten pool depth; It should be explained that the standard molten pool depth is a preset value, which is set by relevant personnel in this field.

[0029] As a preferred embodiment of the present invention, the method for determining the risk of abnormal weld width in the current weld width is specifically as follows: Compare the weld width abnormal risk index with the weld width abnormal risk index threshold; It should be noted that the threshold value of the weld width anomaly risk index is a set value, which is set by relevant personnel in this field; When the weld width anomaly risk index is less than or equal to the weld width anomaly risk index threshold value, it is determined that the risk of weld width anomaly for the current weld width is a low risk; the smaller the weld width anomaly risk index, the lower the risk of weld width anomaly for the current weld width; When the weld width anomaly risk index is greater than the weld width anomaly risk index threshold value, it is determined that the risk of weld width anomaly for the current weld width is a high risk; the larger the weld width anomaly risk index, the higher the risk of weld width anomaly for the current weld width; When the risk of the current weld width being abnormal is a low risk, only relevant personnel need to perform daily maintenance; When the risk of the current weld width being abnormal is a high risk, it is necessary to adjust the welding speed; It should be noted that the welding speed refers to the moving speed of the welding point. In this embodiment, the moving speed of the welding component 4 is the same as the welding speed, that is, adjusting the moving speed of the welding component 4 can adjust the moving speed of the welding point.

[0030] As a preferred embodiment of the present invention, the welding speed analysis unit specifically includes: A moving speed acquisition module for acquiring the current moving speed of the welding component 4; An adjustment analysis module for establishing a welding speed analysis model and generating a welding speed adjustment value; Among them, the expression of the welding speed analysis model is: ; In the expression, represents the welding speed adjustment value, represents the current welding speed, K represents the weld width anomaly risk index, represents the environmental temperature evaluation value; the environmental temperature evaluation value refers to the ratio between the current environmental temperature value and the standard working condition temperature; It should be noted that the standard working condition temperature refers to the environmental temperature that does not affect welding. In a low-temperature environment, the cooling speed of the welding metal is usually relatively fast, and it is necessary to appropriately reduce the welding speed to avoid excessive cooling, ensure more uniform heat input, and allow the weld to solidify at an appropriate speed; on the contrary, in a high-temperature environment, the cooling speed of the welding metal is slower, and the welding speed should be appropriately increased to prevent overheating.

[0031] As a preferred embodiment of the present invention, the adjustment method of the moving speed adjustment module is specifically: According to the welding speed adjustment value , adjust the moving speed of the welding assembly 4; In this embodiment, the moving speed of the welding assembly 4 is the same as the moving speed of the welding point, that is, the welding speed. By adjusting the moving speed of the welding assembly 4, the welding speed can be adjusted.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision welding CNC machine tool, comprising a welding assembly (4) and a base (1), characterized in that: The machine also includes: A truss assembly (2), the truss assembly (2) being connected to the welding assembly (4) and being used to move the position of the welding assembly (4); A welding control system (5), the welding control system (5) being communicatively connected to a control end of the truss assembly (2) and being used for accurately controlling a moving speed of the welding assembly (4); Wherein, the welding control system (5) specifically comprises: The prediction unit is used to obtain the status data of the welded part and generate the weld width abnormality risk index; wherein the status data includes the surface temperature, the molten pool depth and the current weld width evaluation value; the current weld width evaluation value refers to the ratio of the current weld width to the standard weld width; the surface temperature refers to the surface temperature on both sides of the preset weld on the welded part; A judgment module, used to judge the risk of abnormality of the current weld width according to the weld width abnormality risk index; A welding speed analysis unit, used to obtain the current moving speed of the welding assembly (4), establish a welding speed analysis model, and generate a welding speed adjustment value; A moving speed adjustment module, the moving speed adjustment module is communicatively connected to the control end of the truss assembly (2), and is used to adjust the moving speed of the welding assembly (4) according to the welding speed adjustment value.

2. A high-precision welding CNC machine tool according to claim 1, characterized in that: The truss assembly (2) specifically comprises: A bracket (201), the bracket (201) being fixedly arranged on one side of the base (1); A movable frame (202), the movable frame (202) being slidably connected to the support (201) via a groove provided on the support (201); A first threaded rod (203), wherein the first threaded rod (203) is threadedly connected to the movable frame (202), and two ends of the first threaded rod (203) are rotatably connected to the support frame (201).

3. A high-precision welding CNC machine tool according to claim 2, characterized in that: The welding assembly (4) further comprises: A welding medium supply component (401), wherein the welding medium supply component (401) is fixedly arranged on the movable frame (202); A welding head (402), the welding head (402) being slidably arranged on one side of the movable frame (202); A medium transmission pipeline (403), one end of the medium transmission pipeline (403) being connected to the welding medium supply member (401) and the other end of the medium transmission pipeline (403) being connected to the welding head (402); A fourth threaded rod (404), the fourth threaded rod (404) is threadedly connected to the welding head (402), and both ends of the fourth threaded rod (404) are rotatably connected to the moving frame (202).

4. A high-precision welding CNC machine tool according to claim 1, characterized in that: The prediction unit specifically includes: Temperature analysis module, used to obtain the surface temperature of welded parts and generate heat-affected zone prediction index; The molten pool analysis module is used to obtain the molten pool depth and generate a molten pool depth prediction index; The risk analysis module is used to establish a risk analysis model based on the weld deviation index and the current weld width evaluation value, substitute the heat affected zone prediction index and the molten pool depth prediction index into the risk analysis model, and generate the weld width abnormal risk index; the weld deviation index refers to the ratio of the difference between the current molten pool position and the preset weld position to the preset weld position.

5. A high-precision welding CNC machine tool according to claim 4, characterized in that: The temperature analysis module specifically includes: The temperature change analysis submodule is used to generate the surface temperature change rate based on the historical surface temperature values ​​and temperature change time points of the weldment; A heat-affected time analysis submodule, used to obtain the heat-affected area, welding point position and welding point moving speed of the current welding component (4) on the welded part, and generate a heat-affected time remaining value; The final temperature analysis submodule is used to generate the final temperature prediction value according to the surface temperature change rate and the remaining value of the heat influence time; The heat-affected zone prediction index generation submodule is used to generate the heat-affected zone prediction index according to the final temperature prediction value and the minimum value of the standard melting point temperature of the weldment.

6. A high-precision welding CNC machine tool according to claim 4, characterized in that: The molten pool analysis module specifically includes: The depth change analysis submodule is used to generate the molten pool depth change speed according to the historical molten pool depth and depth change time point of the weldment; The final molten pool depth analysis submodule is used to obtain the remaining value of the heat-affected time and generate the final molten pool depth prediction value; The molten pool depth prediction index generation submodule is used to generate a molten pool depth prediction index based on the final molten pool depth prediction value and the standard molten pool depth.

7. A high-precision welding CNC machine tool according to claim 4, characterized in that: The welding speed analysis unit specifically includes: A moving speed acquisition module, used to acquire the current moving speed of the welding assembly (4); The adjustment analysis module is used to establish a welding speed analysis model and generate a welding speed adjustment value based on the ambient temperature evaluation value and the weld width abnormal risk index; the ambient temperature evaluation value refers to the ratio between the current ambient temperature value and the standard working temperature.

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