Welding control method and system for machining pump shell of hydroelectric generating set

Abstract

The invention relates to the technical field of welding control, and discloses a welding control method and system for machining a pump shell of a hydroelectric generating set, and the method comprises the steps: collecting instruction current and actual current in real time, and carrying out feedback compensation adjustment through an improved proportional-integral control method; performing secondary adjustment through the temperature adjustment coefficient; carrying out three-stage adjustment by utilizing a speed adjustment coefficient; and calculating a thickness adjustment coefficient through the change rate of the material thickness, and further optimizing the three-level compensation current. Compared with the technical problem that stable welding quality cannot be realized when a pump shell with a complicated shape and non-uniform thickness is welded in the prior art, particularly under the condition of relatively large temperature fluctuation or unstable welding speed, the method has the advantages that a multi-stage feedback compensation mechanism is combined with improved proportional-integral control and temperature and speed regulation, so that stable welding quality is realized; and the self-adaptive adjustment of the arc length is realized, so that the problems of non-uniform welding and insufficient fusion depth are avoided, and the consistency and efficiency of the welding quality of the pump shell are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding control, and in particular relates to a welding control method and system for processing a pump casing of a hydraulic generator set. Background Art

[0002] At present, as the hydroelectric generating units develop towards large-scale and complex directions, the processing difficulty of the pump casing is also increasing. The pump casing usually has a complex geometry and uneven thickness, and the welding process is affected by many factors, such as temperature fluctuations, changes in welding speed, and differences in material properties. These factors will have a significant impact on the quality and stability of welding. The existing welding control technology has many shortcomings when facing these complex conditions. It is difficult to accurately adjust various dynamic parameters in real time, and thus cannot guarantee high-quality welding effects. For example, during the welding process, temperature fluctuations may cause the material in the welding area to expand or contract, thereby affecting the stability of the welding arc and the uniformity of the weld. At the same time, changes in welding speed will also affect the demand for welding current, thereby affecting the penetration depth and weld strength. In addition, due to the different material thicknesses, the current and heat required during the welding process will also vary. The existing technology is usually unable to effectively adapt to this dynamic thickness change, resulting in unstable penetration depth and uneven weld quality during welding. However, most existing welding control methods are single-parameter feedback control, which makes it difficult to make multi-dimensional real-time adjustments when welding conditions change. They lack comprehensive control over current, temperature, speed, and material thickness, and thus cannot fully meet the requirements of high precision, high consistency, and high efficiency in the welding of pump casings of hydroelectric generator sets. Therefore, there is an urgent need for a welding control method that can respond to the dynamic changes of temperature, speed, and thickness in real time under complex and changeable welding conditions, and adaptively control the welding current and arc length, so as to ensure the stability of welding quality and improve the consistency of welds, thereby meeting the high-quality requirements of hydraulic generator pump casing processing and improving processing efficiency and product performance. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to propose a welding control method and system for processing the pump casing of a hydroelectric generator set, aiming to solve the technical problem in the prior art that stable welding quality cannot be achieved when welding pump casings with complex shapes and uneven thicknesses, especially under conditions of large temperature fluctuations or unstable welding speeds.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a welding control method for processing a pump casing of a hydraulic generator set, comprising:

[0005] Step S10: Real-time acquisition of command current and the actual current , calculate the deviation between the command current and the actual current ,when When the preset threshold is exceeded, the actual current is adjusted by improving the proportional integral control method. Adjust to get feedback compensation current ; Among them, the improved proportional integral control method adopts the formula:

[0006] in, is the feedback compensation current, is the command current, is the deviation between the command current and the actual current, is the initial proportional coefficient, which is used to control the response speed of current adjustment. is the initial integral coefficient, which is used to control the influence of the integral term. is a proportional dynamic adjustment factor, which is used to adjust the proportional coefficient according to the size of the current difference. is the integral attenuation factor, which is used to attenuate the influence of the integral term over time. is the time, which is used to indicate the duration of the current difference. is the attenuation factor of the integral term;

[0007] Step S20: Real-time acquisition of the temperature of the welding area and target temperature , and calculate the temperature difference T, calculated as:

[0008] when When the value exceeds 10℃, calculate the temperature adjustment coefficient , the calculation formula is:

[0009] in, is the temperature adjustment coefficient, ranging from 0.1 to 0.5;

[0010] And according to the temperature adjustment coefficient Feedback compensation current Adjust to get the secondary feedback compensation current ;

[0011] Step S30: Real-time collection of welding speed and target speed , calculate the speed difference, the calculation formula is:

[0012] when When the speed difference exceeds the preset threshold, the speed adjustment coefficient is calculated , the calculation formula is:

[0013] in, is the speed adjustment coefficient, ranging from 0.05 to 0.2;

[0014] And according to the speed adjustment coefficient Secondary feedback compensation current Adjust to get the three-level feedback compensation current ;

[0015] Step S40: Continuously collect the material thickness of the welding area and calculate the material thickness change rate , the calculation formula is:

[0016] in, is the material thickness measured at the current moment, is the material thickness measured at the last moment, is the time difference between the current moment and the previous moment;

[0017] According to the thickness change rate Calculate the thickness adjustment factor , the calculation formula is:

[0018] in, is the thickness adjustment factor, ranging from 0.05 to 0.3, is the thickness change rate adjustment factor, which is used to control the effect of thickness change rate on welding current. is the preset reference thickness;

[0019] And adjust the coefficient according to the thickness For the three-level feedback compensation current Adjust to get the optimal feedback current

[0020] Step S50: Based on the optimized feedback current obtained in step S40 The arc reference length parameters are adaptively controlled and adjusted.

[0021] Preferably, in step S10, the deviation between the command current and the actual current The calculation formula is:

[0022] in, is a correction factor used to adjust the sensitivity of the deviation value according to actual application requirements.

[0023] Preferably, in step S20, the process of adjusting the feedback compensation current according to the temperature adjustment coefficient to obtain the secondary feedback compensation current adopts the formula: .

[0024] Preferably, in step S30, the process of adjusting the secondary feedback compensation current according to the speed adjustment coefficient adopts the formula: .

[0025] Preferably, in step S40, the process of adjusting the three-level feedback compensation current according to the thickness adjustment coefficient to obtain the optimized feedback current adopts the formula .

[0026] Preferably, in step S50, the process of adaptively controlling and adjusting the arc reference length parameter adopts the formula:

[0027] in, The arc length is adjusted adaptively to dynamically match the actual needs during the welding process. is the reference arc length, is the initial target arc length, To optimize the current weighting factor and control the effect of the optimized feedback current on the arc length adjustment, It is the optimized feedback current after compensation and adjustment in step S40.

[0028] Preferably, in step S50, the arc reference length parameter supports manual adjustment as needed.

[0029] The present invention also provides a welding control system for processing a pump casing of a hydraulic generator set, comprising:

[0030] Current control module, used to collect command current in real time and the actual current , calculate the deviation between the command current and the actual current ,when When the preset threshold is exceeded, the actual current is adjusted by improving the proportional integral control method. Adjust to get feedback compensation current ; Among them, the improved proportional integral control method adopts the formula:

[0031] in, is the feedback compensation current, is the command current, is the deviation between the command current and the actual current, is the initial proportional coefficient, which is used to control the response speed of current adjustment. is the initial integral coefficient, which is used to control the influence of the integral term. is a proportional dynamic adjustment factor, which is used to adjust the proportional coefficient according to the size of the current difference. is the integral attenuation factor, which is used to attenuate the influence of the integral term over time. is the time, which is used to indicate the duration of the current difference. is the attenuation factor of the integral term;

[0032] Temperature control module, used to collect the temperature of the welding area in real time and target temperature , and calculate the temperature difference T, calculated as:

[0033] when When the value exceeds 10℃, calculate the temperature adjustment coefficient , the calculation formula is:

[0034] in, is the temperature adjustment coefficient, ranging from 0.1 to 0.5;

[0035] And according to the temperature adjustment coefficient Feedback compensation current Adjust to get the secondary feedback compensation current ;

[0036] Speed ​​control module, used to collect welding speed in real time and target speed , calculate the speed difference, the calculation formula is:

[0037] when When the speed difference exceeds the preset threshold, the speed adjustment coefficient is calculated , the calculation formula is:

[0038] in, is the speed adjustment coefficient, ranging from 0.05 to 0.2;

[0039] And according to the speed adjustment coefficient Secondary feedback compensation current Adjust to get the three-level feedback compensation current ;

[0040] Thickness control module, used to continuously collect material thickness in the welding area and calculate the material thickness change rate , the calculation formula is:

[0041] in, is the material thickness measured at the current moment, is the material thickness measured at the last moment, is the time difference between the current moment and the previous moment;

[0042] According to the thickness change rate Calculate the thickness adjustment factor , the calculation formula is:

[0043] in, is the thickness adjustment factor, ranging from 0.05 to 0.3, is the thickness change rate adjustment factor, which is used to control the effect of thickness change rate on welding current. is the preset reference thickness;

[0044] And adjust the coefficient according to the thickness For the three-level feedback compensation current Adjust to get the optimal feedback current ;

[0045] The arc length control module is used to optimize the feedback current obtained in step S40. The arc reference length parameters are adaptively controlled and adjusted.

[0046] The beneficial effect of the present invention is that compared with the technical problem in the prior art that stable welding quality cannot be achieved when welding pump casings of complex shapes and uneven thicknesses, especially under conditions of large temperature fluctuations or unstable welding speeds, the present invention achieves adaptive adjustment of arc length through a multi-stage feedback compensation mechanism combined with improved proportional integral control, temperature and speed regulation, thereby avoiding the problems of uneven welding and insufficient penetration, and improving the consistency and efficiency of the pump casing welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 The present invention is a flow chart of a first embodiment of a welding control method for machining a pump casing of a hydroelectric generator set provided by the present invention.

[0049] Figure 2 A system schematic diagram of a welding control method for processing a pump casing of a hydraulic generator set provided by the present invention.

[0050] Figure 3 A schematic diagram of equipment for a welding control method for processing a pump casing of a hydraulic generator set provided by the present invention. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Embodiment 1: Figure 1 2 is a flow chart of a first embodiment of a welding control method for processing a pump casing of a hydraulic generator set according to the present invention, and a first embodiment of a welding control method for processing a pump casing of a hydraulic generator set according to the present invention is proposed.

[0053] In a first embodiment, the welding control method for processing a pump casing of a hydroelectric generator set includes:

[0054] Step S10: Real-time acquisition of command current and the actual current , calculate the deviation between the command current and the actual current ,in, , is the correction factor, which is used to adjust the sensitivity of the deviation value according to the actual application requirements. When the preset threshold is exceeded, the actual current is adjusted by improving the proportional integral control method. Adjust to get feedback compensation current ; Among them, the improved proportional integral control method adopts the formula:

[0055] in, is the feedback compensation current, is the command current, is the deviation between the command current and the actual current, is the initial proportional coefficient, which is used to control the response speed of current adjustment. is the initial integral coefficient, which is used to control the influence of the integral term. is a proportional dynamic adjustment factor, which is used to adjust the proportional coefficient according to the size of the current difference. is the integral attenuation factor, which is used to attenuate the influence of the integral term over time. is the time, which is used to indicate the duration of the current difference. is the attenuation factor of the integral term;

[0056] It should be noted that the dynamic adjustment of the proportional and integral terms in the above formula can achieve more flexible feedback control according to the change of current deviation during the welding process, so as to ensure that the current can return to the preset range in a shorter time.

[0057] It should be understood that the formula adds a dynamic adjustment factor and an integral attenuation factor to the traditional PI control, so that the system can flexibly increase the proportional coefficient and improve the response speed when facing a large current deviation, and reduce the proportional coefficient to avoid oscillation when the deviation is small. The introduction of the integral attenuation factor is more important in this method, because the current deviation in the welding process may gradually accumulate over a long period of time, and the traditional integral term is prone to cause system instability in the case of long-term accumulation of deviations. Through the integral attenuation factor, the system can automatically reduce the impact of the integral term when the deviation exists for a long time, ensuring the stability of the system.

[0058] Step S20: Real-time acquisition of the temperature of the welding area and target temperature , and calculate the temperature difference T, calculated as:

[0059] when When the value exceeds 10℃, calculate the temperature adjustment coefficient , the calculation formula is:

[0060] in, is the temperature adjustment coefficient, ranging from 0.1 to 0.5;

[0061] And according to the temperature adjustment coefficient Feedback compensation current Adjust to get the secondary feedback compensation current , specifically, ;

[0062] It should be noted that the temperature difference The calculation is based on the difference between the actual temperature and the target temperature collected in real time. When the temperature difference exceeds 10°C, the system will dynamically adjust the feedback compensation current by calculating the temperature adjustment coefficient, thereby reducing the impact of temperature changes on welding quality. The calculation of the temperature adjustment coefficient introduces the parameter β, which is used to adjust the degree of influence of the temperature difference on the compensation current.

[0063] It is understandable that temperature changes have a significant impact on welding quality. Too high or too low a temperature may cause problems such as uneven weld quality and unstable penetration. , the system can automatically adapt when the temperature changes greatly and adjust the feedback current in time, making the welding process more stable.

[0064] It should be understood that the temperature regulation factor The adaptability of the system is increased, especially when the welding environment is unstable, which can better ensure the consistency of weld quality.

[0065] Step S30: Real-time collection of welding speed and target speed , calculate the speed difference, the calculation formula is:

[0066] when When the speed difference exceeds the preset threshold, the speed adjustment coefficient is calculated , the calculation formula is:

[0067] in, is the speed adjustment coefficient, ranging from 0.05 to 0.2;

[0068] And according to the speed adjustment coefficient Secondary feedback compensation current Adjust to get the three-level feedback compensation current , specifically, ;

[0069] It should be noted that the speed difference The actual welding speed is collected in real time. and target speed When the speed difference exceeds the set threshold, the system will adjust the speed by the speed adjustment coefficient. The speed adjustment coefficient is calculated based on the relative proportion of the speed deviation, and the parameter γ is introduced to control the influence of the speed difference on the compensation current.

[0070] It is understandable that fluctuations in welding speed will directly affect the uniformity and quality of the weld. If the welding speed is too fast or too slow, it may result in insufficient or excessive weld penetration. The system can make appropriate compensation when the speed fluctuates greatly to ensure the stability of welding quality.

[0071] It should be understood that the speed adjustment factor The introduction of makes the system more flexible in dealing with speed fluctuations, and further stabilizes the welding process by adjusting the secondary feedback compensation current.

[0072] Step S40: Continuously collect the material thickness of the welding area and calculate the material thickness change rate , the calculation formula is:

[0073] in, is the material thickness measured at the current moment, is the material thickness measured at the last moment, is the time difference between the current moment and the previous moment;

[0074] According to the thickness change rate Calculate the thickness adjustment factor , the calculation formula is:

[0075] in, is the thickness adjustment factor, ranging from 0.05 to 0.3, is the thickness change rate adjustment factor, which is used to control the effect of thickness change rate on welding current. is the preset reference thickness;

[0076] And adjust the coefficient according to the thickness For the three-level feedback compensation current Adjust to get the optimal feedback current ,in, ;

[0077] It should be noted that the material thickness change rate is calculated by the difference between the material thickness at the current moment and the material thickness at the previous moment collected in real time during the welding process. The thickness change rate reflects the fluctuation of the material thickness during the welding process, which can provide dynamic feedback for the system, so that the system can make appropriate current compensation for the thickness change.

[0078] It is understandable that the change in material thickness has an important impact on the welding quality. If the thickness changes too much, it may lead to insufficient or excessive welding current, thus affecting the uniformity and strength of the weld. , the system can dynamically adjust the feedback current according to the change of thickness to maintain the stability of the welding current.

[0079] It should be understood that the thickness adjustment factor The thickness adjustment factor is introduced into the calculation of and thickness change rate adjustment factor , which is used to adjust the effect of thickness changes on welding current, ensuring that the system can still stabilize the welding process when the material thickness fluctuates.

[0080] Step S50: Based on the optimized feedback current obtained in step S40 Adaptively control and adjust the arc reference length parameters;

[0081] The process of adaptive control adjustment of the arc reference length parameter adopts the formula:

[0082] in, The arc length is adjusted adaptively to dynamically match the actual needs during the welding process. is the reference arc length, is the initial target arc length, To optimize the current weighting factor and control the effect of the optimized feedback current on the arc length adjustment, It is the optimized feedback current after compensation and adjustment in step S40.

[0083] It should be noted that the adaptive control adjustment in step S50 is based on the optimized feedback current obtained in step S40. The arc reference length parameter is adjusted. The purpose of this adjustment is to ensure that the arc length can adapt to different working conditions during welding, especially the dynamic changes in material thickness, temperature and speed, to ensure the consistency and quality of the weld. Optimize feedback current It has been adjusted in multiple levels to take various parameters of the welding process into consideration. As a control input, it is used to adjust the arc reference length, which can keep the arc stable during the welding process, thereby reducing welding defects caused by unstable arc length.

[0084] In actual application, the adjustment range of the arc reference length will be automatically adjusted according to the change of the optimized feedback current. In this way, the welding system can automatically and adaptively adjust the arc length in the face of changes in material thickness, temperature fluctuations and welding speed changes to ensure the consistency of welding quality.

[0085] In addition, the present invention also provides a welding control system for processing a pump casing of a hydraulic generator set, please refer to Figure 2 , the system comprising:

[0086] Current control module, used to collect command current in real time and the actual current , calculate the deviation between the command current and the actual current ,when When the preset threshold is exceeded, the actual current is adjusted by improving the proportional integral control method. Adjust to get feedback compensation current ; Among them, the improved proportional integral control method adopts the formula:

[0087] in, is the feedback compensation current, is the command current, is the deviation between the command current and the actual current, is the initial proportional coefficient, which is used to control the response speed of current adjustment. is the initial integral coefficient, which is used to control the influence of the integral term. is a proportional dynamic adjustment factor, which is used to adjust the proportional coefficient according to the size of the current difference. is the integral attenuation factor, which is used to attenuate the influence of the integral term over time. is the time, which is used to indicate the duration of the current difference. is the attenuation factor of the integral term;

[0088] Temperature control module, used to collect the temperature of the welding area in real time and target temperature , and calculate the temperature difference T, calculated as:

[0089] when When the value exceeds 10℃, calculate the temperature adjustment coefficient , the calculation formula is:

[0090] in, is the temperature adjustment coefficient, ranging from 0.1 to 0.5;

[0091] And according to the temperature adjustment coefficient Feedback compensation current Adjust to get the secondary feedback compensation current ;

[0092] Speed ​​control module, used to collect welding speed in real time and target speed , calculate the speed difference, the calculation formula is:

[0093] when When the speed difference exceeds the preset threshold, the speed adjustment coefficient is calculated , the calculation formula is:

[0094] in, is the speed adjustment coefficient, ranging from 0.05 to 0.2;

[0095] And according to the speed adjustment coefficient Secondary feedback compensation current Adjust to get the three-level feedback compensation current ;

[0096] Thickness control module, used to continuously collect material thickness in the welding area and calculate the material thickness change rate , the calculation formula is:

[0097] in, is the material thickness measured at the current moment, is the material thickness measured at the last moment, is the time difference between the current moment and the previous moment;

[0098] According to the thickness change rate Calculate the thickness adjustment factor , the calculation formula is:

[0099] in, is the thickness adjustment factor, ranging from 0.05 to 0.3, is the thickness change rate adjustment factor, which is used to control the effect of thickness change rate on welding current. is the preset reference thickness;

[0100] And adjust the coefficient according to the thickness For the three-level feedback compensation current Adjust to get the optimal feedback current ;

[0101] The arc length control module is used to optimize the feedback current obtained in step S40. The arc reference length parameters are adaptively controlled and adjusted.

[0102] The present invention provides a welding control system for processing the pump casing of a hydraulic generator set, please refer to Figure 2, the use of a welding control method for processing a pump casing of a hydraulic generator set in the above embodiment can solve the technical problem of welding control for processing a pump casing of a hydraulic generator set. Compared with the prior art, the beneficial effects of a welding control system for processing a pump casing of a hydraulic generator set provided by the present invention are the same as the beneficial effects of a welding control method for processing a pump casing of a hydraulic generator set provided by the above embodiment, and other technical features in the welding control system for processing a pump casing of a hydraulic generator set are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0103] The present invention provides a welding control device for processing a pump casing of a hydroelectric generator set. Figure 3, a welding control device for processing a pump casing of a hydroelectric generator set includes: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions executable by at least one processor, and the instructions are executed by at least one processor so that at least one processor can execute a welding control method for processing a pump casing of a hydroelectric generator set in the above-mentioned embodiment 1. A welding control device for processing a pump casing of a hydroelectric generator set in an embodiment of the present invention may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions: tablet computers), PMPs (Portable Media Players: portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. A welding control device for processing a pump casing of a hydroelectric generator set is only an example and should not bring any limitations to the functions and scope of use of the embodiments of the present invention. A welding control device for processing a pump casing of a hydroelectric generator set may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM) 1004. Various programs and data required for the operation of a welding control device for processing a pump casing of a hydroelectric generator set are also stored in RAM 1004. The processing device 1001, ROM 1002, and RAM 1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow a welding control device for processing a pump casing of a hydraulic generator set to communicate wirelessly or wired with other devices to exchange data. Although a welding control device for processing a pump casing of a hydraulic generator set with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or provided alternatively.

[0104] The present invention also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for controlling welding for processing a pump casing of a hydroelectric generator set. The computer program product provided by the present invention can solve the technical problem of controlling welding for processing a pump casing of a hydroelectric generator set. Compared with the prior art, the beneficial effects of the computer program product provided by the present invention are the same as the beneficial effects of the method for controlling welding for processing a pump casing of a hydroelectric generator set provided by the above-mentioned embodiment, and will not be described in detail here.

[0105] In particular, according to the embodiments disclosed in the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present invention are executed.

[0106] It should be understood that the various parts disclosed in the present invention can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0107] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A welding control method for processing a pump casing of a hydraulic generator set, characterized in that: include: Step S10: Real-time acquisition of command current and the actual current , calculate the deviation between the command current and the actual current ,when When the preset threshold is exceeded, the actual current is adjusted by improving the proportional integral control method. Adjust to get feedback compensation current ; Among them, the improved proportional integral control method adopts the formula: ； in, is the feedback compensation current, is the command current, is the deviation between the command current and the actual current, is the initial proportional coefficient, which is used to control the response speed of current adjustment. is the initial integral coefficient, which is used to control the influence of the integral term. is a proportional dynamic adjustment factor, which is used to adjust the proportional coefficient according to the size of the current difference. is the integral attenuation factor, which is used to attenuate the influence of the integral term over time. is the time, which is used to indicate the duration of the current difference. is the attenuation factor of the integral term; Step S20: Real-time acquisition of the temperature of the welding area and target temperature , and calculate the temperature difference T, calculated as: ； when When the value exceeds 10℃, calculate the temperature adjustment coefficient , the calculation formula is: ； in, is the temperature adjustment coefficient, ranging from 0.1 to 0.5; And according to the temperature adjustment coefficient Feedback compensation current Adjust to get the secondary feedback compensation current ; Step S30: Real-time collection of welding speed and target speed , calculate the speed difference, the calculation formula is: ； when When the speed difference exceeds the preset threshold, the speed adjustment coefficient is calculated , the calculation formula is: ； in, is the speed adjustment coefficient, ranging from 0.05 to 0.2; And according to the speed adjustment coefficient Secondary feedback compensation current Adjust to get the three-level feedback compensation current ; Step S40: Continuously collect the material thickness of the welding area and calculate the material thickness change rate , the calculation formula is: ； in, is the material thickness measured at the current moment, is the material thickness measured at the last moment, is the time difference between the current moment and the previous moment; According to the thickness change rate Calculate the thickness adjustment factor , the calculation formula is: ； in, is the thickness adjustment factor, ranging from 0.05 to 0.3, is the thickness change rate adjustment factor, which is used to control the effect of thickness change rate on welding current. is the preset reference thickness; And adjust the coefficient according to the thickness For the three-level feedback compensation current Adjust to get the optimal feedback current ; Step S50: Based on the optimized feedback current obtained in step S40 The arc reference length parameters are adaptively controlled and adjusted.

2. A welding control method for processing a pump casing of a hydraulic generator set as claimed in claim 1, characterized in that: In step S10, the deviation between the command current and the actual current The calculation formula is: ； in, is a correction factor used to adjust the sensitivity of the deviation value according to actual application requirements.

3. A welding control method for processing a pump casing of a hydraulic generator set as claimed in claim 1, characterized in that: In step S20, the process of adjusting the feedback compensation current according to the temperature adjustment coefficient to obtain the secondary feedback compensation current adopts the formula: .

4. A welding control method for processing a pump casing of a hydraulic generator set as claimed in claim 1, characterized in that: In step S30, the process of adjusting the secondary feedback compensation current according to the speed adjustment coefficient adopts the formula: .

5. A welding control method for processing a pump casing of a hydraulic generator set as claimed in claim 1, characterized in that: In step S40, the process of adjusting the three-level feedback compensation current according to the thickness adjustment coefficient to obtain the optimized feedback current adopts the formula .

6. A welding control method for processing a pump casing of a hydroelectric generator set as claimed in claim 1, characterized in that: In step S50, the process of adaptively controlling and adjusting the arc reference length parameter adopts the formula: ； in, The arc length is adjusted adaptively to dynamically match the actual needs during the welding process. is the reference arc length, is the initial target arc length, To optimize the current weighting factor and control the effect of the optimized feedback current on the arc length adjustment, It is the optimized feedback current after compensation and adjustment in step S40.

7. A welding control method for processing a pump casing of a hydraulic generator set as claimed in claim 1, characterized in that: In step S50, the arc reference length parameter supports manual adjustment as needed.

8. A welding control system for processing a pump casing of a hydroelectric generator set, applied to a welding control method for processing a pump casing of a hydroelectric generator set as claimed in any one of claims 1 to 7, characterized in that: The system comprises: Current control module, used to collect command current in real time and the actual current , calculate the deviation between the command current and the actual current ,when When the preset threshold is exceeded, the actual current is adjusted by improving the proportional integral control method. Adjust to get feedback compensation current ; Among them, the improved proportional integral control method adopts the formula: ； in, is the feedback compensation current, is the command current, is the deviation between the command current and the actual current, is the initial proportional coefficient, which is used to control the response speed of current adjustment. is the initial integral coefficient, which is used to control the influence of the integral term. is a proportional dynamic adjustment factor, which is used to adjust the proportional coefficient according to the size of the current difference. is the integral attenuation factor, which is used to attenuate the influence of the integral term over time. is the time, which is used to indicate the duration of the current difference. is the attenuation factor of the integral term; Temperature control module, used to collect the temperature of the welding area in real time and target temperature , and calculate the temperature difference T, calculated as: ； when When the value exceeds 10℃, calculate the temperature adjustment coefficient , the calculation formula is: ； in, is the temperature adjustment coefficient, ranging from 0.1 to 0.5; And according to the temperature adjustment coefficient Feedback compensation current Adjust to get the secondary feedback compensation current ; Speed ​​control module, used to collect welding speed in real time and target speed , calculate the speed difference, the calculation formula is: ； when When the speed difference exceeds the preset threshold, the speed adjustment coefficient is calculated , the calculation formula is: ； in, is the speed adjustment coefficient, ranging from 0.05 to 0.2; And according to the speed adjustment coefficient Secondary feedback compensation current Adjust to get the three-level feedback compensation current ; Thickness control module, used to continuously collect material thickness in the welding area and calculate the material thickness change rate , the calculation formula is: ； in, is the material thickness measured at the current moment, is the material thickness measured at the last moment, is the time difference between the current moment and the previous moment; According to the thickness change rate Calculate the thickness adjustment factor , the calculation formula is: ； in, is the thickness adjustment factor, ranging from 0.05 to 0.3, is the thickness change rate adjustment factor, which is used to control the effect of thickness change rate on welding current. is the preset reference thickness; And adjust the coefficient according to the thickness For the three-level feedback compensation current Adjust to get the optimal feedback current ; The arc length control module is used to optimize the feedback current obtained in step S40. The arc reference length parameters are adaptively controlled and adjusted.

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