A current control method for a high-frequency welding apparatus

Abstract

The application relates to a current control method of a high-frequency welding device, which comprises the following steps: after the high-frequency welding device receives a current target value instruction, a current value is obtained; it is judged whether the current value is equal to the current target value; if not, the distance between capacitor plates is adjusted according to a first adjustment strategy, and an adjusted current value is obtained; the generated current value is compared with the current target value; if the comparison result is that the generated current value is not equal to the current target value, the current value generated after the distance between capacitor plates is adjusted according to a second adjustment strategy is obtained; it is judged whether the generated current value is equal to the current target value; if not, the distance between capacitor plates is adjusted according to a preset second adjustment strategy, the current value generated by the high-frequency welding device after the distance between capacitor plates is adjusted according to the second adjustment strategy is obtained, and the process is repeated until the current value generated by the high-frequency welding device after the distance between capacitor plates is adjusted according to the second adjustment strategy is equal to the current target value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding equipment control, in particular to a current control method of high-frequency welding equipment. BACKGROUND

[0002] The existing high-frequency machine manufacturing industry refers to the needle display of high-frequency welding current, and the needle display is not accurate and intuitive, and can only be adjusted by manually rotating the knob or the motor. The operator of the high-frequency machine cannot directly set the current value, but can only slowly adjust the current value through manual, time and experience. In the actual high-frequency machine production process, sometimes the high-frequency current value is different due to factors such as voltage, air pressure and material thickness difference, thereby affecting the consistency of the products produced by the high-frequency machine. Especially for military, inflatable and medical products produced by the high-frequency machine, the sealing consistency is very high, and the high-frequency machine cannot guarantee the same current value, which will cause many defective products and increase the cost of manual testing of the products, and greatly affect the quality and production cost.

[0003] Although some simple automatic control methods are used at present to compare the set target current value with the actual current, and adjust the distance between the capacitive plates through the motor. However, this method has a certain degree of automation, but it is difficult to achieve high-precision control of the welding current fluctuation or change in the welding process. SUMMARY

[0004] (I) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides a current control method of high-frequency welding equipment, which solves the technical problems that the current value can only be slowly adjusted by manual, time and experience in the prior art, and the welding current fluctuation or change in the welding process is difficult to achieve high-precision control.

[0006] (II) Technical solutions

[0007] In order to achieve the above-mentioned purposes, the main technical solutions adopted by the present application include:

[0008] The present application provides a current control method of high-frequency welding equipment, comprising:

[0009] S1, after the high-frequency welding equipment receives an instruction of setting a current target value, obtaining the current value generated by the high-frequency welding equipment;

[0010] S2, judging whether the current value generated by the high-frequency welding equipment is equal to the set current target value, if not, adjusting the distance between the capacitor plates in the high-frequency welding equipment according to the first adjustment strategy to obtain the current value generated by the high-frequency welding equipment after the adjustment of the distance between the capacitor plates according to the first adjustment strategy;

[0011] S3, comparing the current value generated by the high-frequency welding equipment with the current target value to obtain a comparison result, if the comparison result is that the current value generated by the high-frequency welding equipment is not the same as the current target value, adjusting the distance between the capacitor plates in the high-frequency welding equipment according to the second adjustment strategy to obtain the current value generated by the high-frequency welding equipment after the adjustment of the distance between the capacitor plates according to the second adjustment strategy;

[0012] S4, judging whether the current value generated by the high-frequency welding equipment after the adjustment of the distance between the capacitor plates according to the second adjustment strategy is equal to the current target value, if not, adjusting the distance between the capacitor plates in the high-frequency welding equipment according to the second adjustment strategy to obtain the current value generated by the high-frequency welding equipment after the adjustment of the distance between the capacitor plates according to the second adjustment strategy, and repeating step S4 until the current value generated by the high-frequency welding equipment after the adjustment of the distance between the capacitor plates according to the second adjustment strategy is equal to the current target value.

[0013] Preferably, before the S1, it further comprises:

[0014] S01, obtaining adjustment information of the high-frequency welding equipment in N different historical time periods respectively;

[0015] Wherein, the adjustment information of the high-frequency welding equipment in each historical time period comprises: the current target value of the high-frequency welding equipment in the historical time period, the current value generated by the high-frequency welding equipment after the high-frequency welding equipment receives the instruction of setting the current target value, and the corresponding capacitor plate distance adjustment amount set in the process of adjusting the current value generated by the high-frequency welding equipment to the current target value set in the historical time period.

[0016] Each historical time period comprises: the process of adjusting the current value generated by the high-frequency welding equipment after the high-frequency welding equipment receives the instruction of setting the current target value to the current target value set in the historical time period.

[0017] S02, obtaining a first current value set I and a first current target value set T according to the adjustment information of the high-frequency welding equipment in N different historical time periods;

[0018] wherein, I = [I1, I2,...I i n] ; T = [T1, T2,...T N n] ; i N ];

[0019] T i is the current target value corresponding to the instruction of setting the current target value received by the high-frequency welding equipment in the i-th historical time period in the N different historical time periods;

[0020] I i is the current value generated by the high-frequency welding equipment after receiving the instruction of setting the current target value T i in the i-th historical time period in the N different historical time periods;

[0021] S03, obtaining an average capacitance plate spacing adjustment amount set according to the capacitance plate spacing adjustment amount set corresponding to the process of adjusting the current value generated by each high-frequency welding equipment to the current target value set in the historical time period.

[0022] Preferably,

[0023] wherein, the capacitance plate spacing adjustment amount set corresponding to the process of adjusting the current value generated by the high-frequency welding equipment in each historical time period to the current target value set in the historical time period is a first capacitance plate spacing adjustment amount set or a second capacitance plate spacing adjustment amount set;

[0024] The first capacitance plate spacing adjustment amount set is the capacitance plate spacing adjustment amount corresponding to the current value A generated by the high-frequency welding equipment when the current target value T i is greater than the current value I i generated by the high-frequency welding equipment in the historical time period;

[0025] wherein, A = [I i + Δ, I i + 2 Δ,... I i + a Δ... I i + n Δ] ;

[0026]

[0027] wherein, I i + a Δ represents the current value I i generated by the high-frequency welding equipment after increasing a Δ;​

[0028] n is a preset value, wherein n is greater than or equal to 100;

[0029] The first set of capacitance plate spacing adjustment amounts corresponding to the process of adjusting the current value generated by the high-frequency welding equipment in the historical time period to the set current target value in the historical time period is:

[0030] C z = [c z1 , c z2 ,... c za ... c zn ];

[0031] C z is the first set of capacitance plate spacing adjustment amounts of the high-frequency welding equipment in the zth historical time period; z ∈ [1, 2,..., N];

[0032] wherein c za is the capacitance plate spacing adjustment amount corresponding to the process of adjusting the current value I i generated by the high-frequency welding equipment in the zth historical time period to I i +aΔ;

[0033] The second set of capacitance plate spacing adjustment amounts is the capacitance plate spacing adjustment amount corresponding to the process of generating a current value B by the high-frequency welding equipment when the current target value T i is less than the current value I i generated by the high-frequency welding equipment in the historical time period;

[0034] wherein,

[0035] wherein,

[0036] wherein, represents the current value I i generated by the high-frequency welding equipment after reducing a ;

[0037] The second set of capacitance plate spacing adjustment amounts corresponding to the process of adjusting the current value generated by the high-frequency welding equipment in the historical time period to the set high-frequency welding equipment current target value in the historical time period is:

[0038] D z = [d z1 , d z2 ,... d za ... d zn ];

[0039] Dz a set of second capacitance plate distance adjustment amounts of the high-frequency welding equipment in the zth historical time period;

[0040] wherein d za is the current value I i generated by the high-frequency welding equipment when the capacitance plate distance adjustment amount is adjusted to .

[0041] Preferably,

[0042] The set of average capacitance plate distance adjustment amounts comprises:

[0043] Based on the set of first capacitance plate distance adjustment amounts corresponding to different historical time periods respectively, the current value I i generated by the high-frequency welding equipment in the different historical time periods meeting the first preset condition is obtained. i The average value of the capacitance plate distance adjustment amount corresponding to the process in which the current value I i generated by the high-frequency welding equipment reaches I i -aΔ after the capacitance plate distance adjustment.

[0044] Based on the set of second capacitance plate distance adjustment amounts corresponding to different historical time periods respectively, the current value I i generated by the high-frequency welding equipment in the different historical time periods meeting the first preset condition is obtained. i The average value of the capacitance plate distance adjustment amount corresponding to the process in which the current value I i generated by the high-frequency welding equipment reaches I i -aΔ after the capacitance plate distance adjustment.

[0045] The first preset condition is that the high-frequency welding equipment receives the same set current target value and the current value generated by the high-frequency welding equipment is also the same after the high-frequency welding equipment receives the set current target value.

[0046] Preferably, the S2 specifically comprises:

[0047] If the current value generated by the high-frequency welding equipment after receiving the instruction of the set current target value is less than the current target value corresponding to the instruction, then the current value generated by the high-frequency welding equipment is rounded to obtain an IB value.

[0048] The average value of the final capacitance plate distance adjustment amount in the set of average capacitance plate distance adjustment amounts is determined according to the IB value and the current target value corresponding to the high-frequency welding equipment.

[0049] The average value of the final capacitance plate distance adjustment amount is the average value of the capacitance plate distance adjustment amount corresponding to the process in which the current value I i generated by the high-frequency welding equipment reaches I i generated by the high-frequency welding equipment when the current value I i generated by the high-frequency welding equipment is equal to the IB value.The average value of the capacitor plate spacing adjustment corresponding to the +xΔ process;

[0050] Where the value of x satisfies the first numerical condition;

[0051] The first numerical condition is: the absolute value of the target current value of the high-frequency welding equipment minus W is less than Δ; where W = I i +xΔ;

[0052] Among them, the current value I generated by the high-frequency welding equipment that meets the first preset condition during the historical period. i The corresponding current target value is greater than or equal to the current target value corresponding to the instruction of the set current target value received by the high-frequency welding equipment;

[0053] The average value of the final capacitor plate spacing adjustment amount by the motor in the high-frequency welding equipment is used to obtain the current value generated by the high-frequency welding equipment after the capacitor plate spacing is reduced.

[0054] Preferably, S2 specifically includes:

[0055] If the current value generated by the high-frequency welding equipment after receiving the instruction to set the target current value is greater than the target current value corresponding to the instruction, then the integer value of the current value generated by the high-frequency welding equipment during its current operation is used to obtain the IF value.

[0056] The average value of the final capacitor plate spacing adjustment amount in the set of average capacitor plate spacing adjustment amounts is determined based on the IF value and the preset current target value.

[0057] The final capacitor plate spacing adjustment is the current value I generated by the high-frequency welding equipment that meets the first preset condition during different historical time periods. i When the value is equal to IF, the capacitor plate spacing is adjusted to reach I. i When -yΔ, the average value of the capacitor plate spacing adjustment amount;

[0058] Among them, the current value I generated by the high-frequency welding equipment that meets the first preset condition during the historical period. i The corresponding target current value is greater than or equal to the target current value corresponding to the high-frequency welding equipment;

[0059] The value of y satisfies the second numerical condition;

[0060] The second numerical condition is that the absolute value of the target current value of the high-frequency welding equipment minus Q is less than Δ; where Q = I i -yΔ;

[0061] By using the average value of the final capacitor plate spacing adjustment amount by the motor in the high-frequency welding equipment to increase the capacitor plate spacing, the current value corresponding to the instruction of the set current target value received by the high-frequency welding equipment after the capacitor plate spacing is increased is obtained.

[0062] Preferably, S3 specifically includes:

[0063] If the comparison result shows that the current value generated by the high-frequency welding equipment corresponding to the adjusted capacitor plate spacing is greater than the target current value, then the capacitor plate spacing is corrected according to formula (1) in the pre-set second adjustment strategy to obtain the corrected capacitor plate spacing I. Ae ;

[0064] The formula (1) is:

[0065] I Ae =I A(e-1) +Fe;

[0066] Fe is the preset adjustment amount when the current value generated by the high-frequency welding equipment corresponding to the capacitor plate spacing after the capacitor plate spacing is adjusted by the first strategy does not decrease to the preset current target value, when the capacitor plate spacing is corrected by formula (1) in the preset second adjustment strategy for the eth time.

[0067] I A(e-1) The current value generated by the high-frequency welding equipment after the capacitor plate spacing is corrected by formula (1) in the pre-set second adjustment strategy for the e-1th time; where e is greater than or equal to 1.

[0068] Preferably,

[0069] If the comparison result shows that the current value generated by the high-frequency welding equipment corresponding to the capacitor plate spacing after the adjustment of the first adjustment strategy is less than the preset current target value, then the difference between the current value generated by the high-frequency welding equipment corresponding to the capacitor plate spacing after the adjustment of the first adjustment strategy and the preset current target value is obtained.

[0070] The difference is compared with the preset threshold N0 to obtain a numerical comparison result; and based on the numerical comparison result, the adjustment amount of the capacitor plate spacing is set.

[0071] Preferably, based on the numerical comparison results, the adjustment amount of the capacitor plate spacing is set, specifically including:

[0072] If the difference is less than the preset threshold N0, then the current capacitor plate spacing is reduced by one millimeter.

[0073] If the difference is greater than the preset threshold N0, then the current capacitor plate spacing is reduced by a preset unit distance;

[0074] The pre-specified unit distance is the absolute value of the difference between the difference and the pre-set threshold N0.

[0075] Preferably, N is greater than or equal to 100.

[0076] (III) Beneficial Effects

[0077] The beneficial effects of this invention are as follows: The current control method for high-frequency welding equipment of this invention first reduces the difference between the actual current value generated by the high-frequency welding equipment and the set target current value through a first adjustment strategy in step S2. Then, in step S3, a pre-set second adjustment strategy is used to further reduce the difference between the actual current value generated by the high-frequency welding equipment and the set target current value until they are completely identical. In step S2, an adjustment amount selected from the capacitor plate spacing adjustment amount over a historical period is used, enabling relatively accurate adjustments over a wide range. In step S3, a pre-set adjustment amount is used to further fine-tune the capacitor plate spacing. Compared with the prior art, the current control method for high-frequency welding equipment of this invention can achieve automated control and high-precision control of the fluctuations in the welding current during the welding process. Attached Figure Description

[0078] Figure 1 This is a flowchart of a current control method for a high-frequency welding device according to the present invention;

[0079] Figure 2 This is a flowchart of a current control method for a high-frequency welding device according to an embodiment of the present invention. Detailed Implementation

[0080] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0081] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0082] See Figure 1This embodiment provides a current control method for high-frequency welding equipment, including:

[0083] S1. After receiving the instruction to set the target current value, the high-frequency welding equipment obtains the current value generated by the high-frequency welding equipment.

[0084] S2. Determine whether the current value generated by the high-frequency welding equipment is equal to the set current target value. If not, adjust the spacing between the capacitor plates in the high-frequency welding equipment according to the preset first adjustment strategy through the motor in the high-frequency welding equipment, and obtain the current value generated by the high-frequency welding equipment after the capacitor plate spacing is adjusted by the first adjustment strategy.

[0085] S3. After the capacitor plate spacing is adjusted by the first adjustment strategy, the current value generated by the high-frequency welding equipment is compared with the target current value to obtain a comparison result. If the comparison result is that the current value generated by the high-frequency welding equipment is different from the target current value, the capacitor plate spacing in the high-frequency welding equipment is adjusted by the motor in the high-frequency welding equipment according to the preset second adjustment strategy to obtain the current value generated by the high-frequency welding equipment after the capacitor plate spacing is adjusted by the second adjustment strategy.

[0086] S4. Determine whether the current value generated by the high-frequency welding equipment after the capacitor plate spacing is adjusted by the second adjustment strategy is equal to the target current value. If not, adjust the capacitor plate spacing in the high-frequency welding equipment according to the preset second adjustment strategy by the motor in the high-frequency welding equipment, obtain the current value generated by the high-frequency welding equipment after the capacitor plate spacing is adjusted by the second adjustment strategy, and repeat step S4 until the current value generated by the high-frequency welding equipment is equal to the target current value after the capacitor plate spacing is adjusted according to the preset second adjustment strategy.

[0087] In practical applications of this embodiment, the method further includes the following step before step S1:

[0088] S01. Obtain the adjustment information of high-frequency welding equipment operation in N different historical time periods.

[0089] The adjustment information for the operation of the high-frequency welding equipment in each historical time period includes: the target current value of the high-frequency welding equipment in that historical time period, the current value generated by the high-frequency welding equipment after receiving the instruction to set the target current value, and the set of capacitor plate spacing adjustment amounts corresponding to the process of adjusting the current value generated by the high-frequency welding equipment in that historical time period to the target current value set in that historical time period.

[0090] Each historical time period includes: after the high-frequency welding equipment receives the instruction to set the target current value, the current value generated by the high-frequency welding equipment is adjusted to the target current value set in that historical time period after the spacing between the capacitor plates in the high-frequency welding equipment is adjusted.

[0091] Among them, the set of capacitor plate spacing adjustment amounts corresponding to the process of adjusting the current value generated by the high-frequency welding equipment to the current target value set in that historical time period is the first capacitor plate spacing adjustment amount set or the second capacitor plate spacing adjustment amount set.

[0092] The first set of capacitor plate spacing adjustment amounts is the amount of current target value T during this historical time period. i The current value I generated by the high-frequency welding equipment is greater than that of the high-frequency welding equipment. i When the current generated by the high-frequency welding equipment is A, the corresponding adjustment amount of the capacitor plate spacing.

[0093] Among them, A=[I i +Δ、I i +2Δ、...I i +aΔ...I i +nΔ).

[0094]

[0095] Among them, I i +aΔ represents the current value I generated by the high-frequency welding equipment. i The current value after adding 'a' times Δ.

[0096] n is a preset value, where n is greater than or equal to 100.

[0097] The set of first capacitor plate spacing adjustment amounts corresponding to the process of adjusting the current value generated by the high-frequency welding equipment during the operation of the high-frequency welding equipment to the current target value set in the historical period is as follows:

[0098] C z =[c z1 c z2 ...c za ...c zn ].

[0099] C z Let z be the set of the first capacitor plate spacing adjustment amount of the high-frequency welding equipment in the z-th historical time period; z∈[1,2,....,N].

[0100] Among them, c za The current value I generated by the high-frequency welding equipment in the z-th historical time period is...i Adjusted to I i The adjustment amount of capacitor plate spacing corresponding to +aΔ.

[0101] The second set of capacitor plate spacing adjustment amounts is the amount of current target value T during this historical time period. i The current value I generated by the high-frequency welding equipment is less than that of the high-frequency welding equipment. i When the current value generated by the high-frequency welding equipment is B, the corresponding adjustment amount of the capacitor plate spacing is given.

[0102] in,

[0103] in,

[0104] in, I represents the current value generated by the high-frequency welding equipment. i Reduce a The current value after that.

[0105] The set of second capacitor plate spacing adjustment amounts corresponding to the current value generated by the high-frequency welding equipment during this historical period being adjusted to the target current value set for the high-frequency welding equipment during this historical period is as follows:

[0106] D z =[d z1 d z2 ...d za ...d zn ].

[0107] D z This is the set of adjustments made to the spacing between the second capacitor plates of the high-frequency welding equipment during the z-th historical time period.

[0108] Where, d za The current value I generated by the high-frequency welding equipment i Adjusted to The corresponding adjustment amount of capacitor plate spacing.

[0109] S02. Based on the adjustment information of high-frequency welding equipment in N different historical time periods, obtain the first current value set I and the first current target value set T; N is greater than or equal to 100.

[0110] Where I = [I1, I2, ... I i ...、I N ]; T = [T1, T2, ... T i ...、T N ].

[0111] T iThe target current value is the value corresponding to the instruction to set the target current value received by the high-frequency welding equipment in the i-th historical time period among N different historical time periods.

[0112] I i To ensure that the high-frequency welding equipment receives a target current value T in the i-th historical time period out of N different historical time periods. i The current value generated by the high-frequency welding equipment after the instruction.

[0113] S03. Based on the set of capacitor plate spacing adjustment amounts corresponding to the process of adjusting the current value generated by each high-frequency welding equipment to the current target value set in the historical time period, obtain the average capacitor plate spacing adjustment amount set.

[0114] The set of average capacitor plate spacing adjustment amounts includes:

[0115] Based on the set of first capacitor plate spacing adjustment amounts corresponding to different historical time periods, the current values ​​I generated by the high-frequency welding equipment in different historical time periods that meet the first preset conditions are obtained. i After adjusting the capacitor plate spacing, I was achieved. i During the +aΔ process, the average value of the corresponding capacitor plate spacing adjustment; and, based on the second capacitor plate spacing adjustment sets corresponding to different historical time periods, the current value I generated by the high-frequency welding equipment in different historical time periods that meets the first preset condition. i After adjusting the capacitor plate spacing to achieve I i During the process of -aΔ, the average value of the corresponding capacitor plate spacing adjustment.

[0116] The first preset condition is that the high-frequency welding equipment receives the same set current target value and the current value generated by the high-frequency welding equipment is also the same after the high-frequency welding equipment receives the set current target value.

[0117] Specifically, S2 includes:

[0118] If the current value generated by the high-frequency welding equipment after receiving the instruction to set the target current value is less than the target current value corresponding to the instruction, then the integer value of the current value generated by the high-frequency welding equipment is rounded to obtain the IB value.

[0119] The average value of the final capacitor plate spacing adjustment amount in the set of average capacitor plate spacing adjustment amounts is determined based on the IB value and the target current value corresponding to the high-frequency welding equipment.

[0120] The average value of the final capacitor plate spacing adjustment is the current value I generated by the high-frequency welding equipment that meets the first preset condition in different historical time periods. iWhen the current generated by the high-frequency welding equipment is equal to the IB value, the current value is adjusted to I after adjusting the capacitor plate spacing. i The average value of the capacitor plate spacing adjustment corresponding to the +xΔ process.

[0121] The value of x satisfies the first numerical condition.

[0122] The first numerical condition is: the absolute value of the target current value of the high-frequency welding equipment minus W is less than Δ; where W = I i +xΔ.

[0123] Among them, the current value I generated by the high-frequency welding equipment that meets the first preset condition during the historical period. i The corresponding current target value is greater than or equal to the current target value corresponding to the instruction of the set current target value received by the high-frequency welding equipment.

[0124] The average value of the final capacitor plate spacing adjustment amount by the motor in the high-frequency welding equipment is used to obtain the current value generated by the high-frequency welding equipment after the capacitor plate spacing is reduced.

[0125] If the current value generated by the high-frequency welding equipment after receiving the instruction to set the target current value is greater than the target current value corresponding to the instruction, then the integer value of the current value generated by the high-frequency welding equipment during its current operation is used to obtain the IF value.

[0126] The average value of the final capacitor plate spacing adjustment amount in the set of average capacitor plate spacing adjustment amounts is determined based on the IF value and the preset current target value.

[0127] The final capacitor plate spacing adjustment is the current value I generated by the high-frequency welding equipment that meets the first preset condition during different historical time periods. i When the value is equal to IF, the capacitor plate spacing is adjusted to reach I. i When -yΔ, it is the average value of the capacitor plate spacing adjustment.

[0128] Among them, the current value I generated by the high-frequency welding equipment that meets the first preset condition during the historical period. i The corresponding target current value is greater than or equal to the target current value corresponding to the high-frequency welding equipment.

[0129] The value of y satisfies the second numerical condition.

[0130] The second numerical condition is that the absolute value of the target current value of the high-frequency welding equipment minus Q is less than Δ; where Q = I i -yΔ.

[0131] By using the average value of the final capacitor plate spacing adjustment amount by the motor in the high-frequency welding equipment to increase the capacitor plate spacing, the current value corresponding to the instruction of the set current target value received by the high-frequency welding equipment after the capacitor plate spacing is increased is obtained.

[0132] Specifically, S3 includes:

[0133] If the comparison result shows that the current value generated by the high-frequency welding equipment corresponding to the adjusted capacitor plate spacing is greater than the target current value, then the capacitor plate spacing is corrected according to formula (1) in the pre-set second adjustment strategy to obtain the corrected capacitor plate spacing I. Ae .

[0134] The formula (1) is:

[0135] I Ae =I A(e-1) +Fe.

[0136] Fe is the preset adjustment amount when the current value generated by the high-frequency welding equipment corresponding to the capacitor plate spacing after the first strategy adjustment is adopted does not decrease to the preset current target value, and the capacitor plate spacing is corrected by formula (1) in the preset second adjustment strategy for the eth time.

[0137] I A(e-1) The current value generated by the high-frequency welding equipment after the capacitor plate spacing is corrected by formula (1) in the pre-set second adjustment strategy for the e-1th time; where e is greater than or equal to 1.

[0138] In a specific application of this embodiment, if the comparison result shows that the current value generated by the high-frequency welding equipment corresponding to the capacitor plate spacing after the adjustment of the first adjustment strategy is less than the preset current target value, then the difference between the current value generated by the high-frequency welding equipment corresponding to the capacitor plate spacing after the adjustment of the first adjustment strategy and the preset current target value is obtained.

[0139] The difference is compared with the preset threshold N0 to obtain a numerical comparison result; and based on the numerical comparison result, the adjustment amount of the capacitor plate spacing is set.

[0140] Specifically, based on the numerical comparison results, the adjustment amount for the capacitor plate spacing is set, including:

[0141] If the difference is less than the preset threshold N0, the current capacitor plate spacing is reduced by one millimeter.

[0142] If the difference is greater than the preset threshold N0, the current capacitor plate spacing is reduced by a preset unit distance.

[0143] The pre-specified unit distance is the absolute value of the difference between the difference and the pre-set threshold N0.

[0144] This embodiment of a current control method for a high-frequency welding device first reduces the difference between the actual current value generated by the high-frequency welding device and the set target current value through a first adjustment strategy in step S2. Then, in step S3, a pre-set second adjustment strategy is used to further reduce the difference until they are completely identical. In step S2, an adjustment amount selected from the capacitor plate spacing adjustment over a historical period is used, enabling relatively accurate adjustments over a wide range. In step S3, a pre-set adjustment amount is used to further fine-tune the capacitor plate spacing. Compared to existing technologies, this invention's current control method for a high-frequency welding device achieves automated control and high-precision control of current fluctuations during the welding process.

[0145] This embodiment also provides a specific implementation of a current control method for high-frequency welding equipment. The high-frequency current is displayed on a touchscreen via PLC calculations. When changing molds on the high-frequency machine, the required current value for that mold only needs to be input on the touchscreen. During operation, the PLC automatically controls the output current of the high-frequency machine through PID calculations. PID calculations combine proportional, integral, and derivative operations, accelerating the system's response speed, effectively eliminating steady-state errors, and significantly improving both static and dynamic quality. In practical applications, this provides high precision for real-time current control in high-frequency welding.

[0146] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0147] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, as well as combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions.

[0148] It should be noted that any reference numerals placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In claims that enumerate several means, several of these means may be embodied by the same hardware. The use of the terms first, second, third, etc., is merely for convenience of expression and does not indicate any order. These terms can be understood as part of the component names.

[0149] Furthermore, it should be noted that in the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0150] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the claims should be interpreted to include both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0151] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, then this invention should also include these modifications and variations.

Claims

1. A current control method for a high-frequency welding equipment, characterized in that, include: S1. After the high-frequency welding equipment receives the instruction to set the target current value, the current value generated by the high-frequency welding equipment is obtained. S2. Determine whether the current value generated by the high-frequency welding equipment is equal to the set current target value. If not, adjust the spacing between the capacitor plates in the high-frequency welding equipment according to the preset first adjustment strategy through the motor in the high-frequency welding equipment, and obtain the current value generated by the high-frequency welding equipment after the capacitor plate spacing is adjusted by the first adjustment strategy. S3. After the capacitor plate spacing is adjusted by the first adjustment strategy, the current value generated by the high-frequency welding equipment is compared with the target current value to obtain a comparison result. If the comparison result is that the current value generated by the high-frequency welding equipment is different from the target current value, the capacitor plate spacing in the high-frequency welding equipment is adjusted by the motor in the high-frequency welding equipment according to the preset second adjustment strategy to obtain the current value generated by the high-frequency welding equipment after the capacitor plate spacing is adjusted by the second adjustment strategy. S4. Determine whether the current value generated by the high-frequency welding equipment after the capacitor plate spacing is adjusted by the second adjustment strategy is equal to the target current value; if not, adjust the capacitor plate spacing in the high-frequency welding equipment according to the preset second adjustment strategy by the motor in the high-frequency welding equipment, obtain the current value generated by the high-frequency welding equipment after the capacitor plate spacing is adjusted by the second adjustment strategy, and repeat step S4 until the current value generated by the high-frequency welding equipment is equal to the target current value after the capacitor plate spacing is adjusted according to the preset second adjustment strategy. Before S1, it also includes: S01. Obtain the adjustment information of high-frequency welding equipment operation in N different historical time periods; The adjustment information for the operation of the high-frequency welding equipment in each historical time period includes: the target current value of the high-frequency welding equipment in that historical time period, the current value generated by the high-frequency welding equipment after receiving the instruction to set the target current value, and the set of capacitor plate spacing adjustment amounts corresponding to the process of adjusting the current value generated by the high-frequency welding equipment in that historical time period to the target current value set in that historical time period. Each historical time period includes: after the high-frequency welding equipment receives the instruction to set the target current value, the current value generated by the high-frequency welding equipment is adjusted to the target current value set in that historical time period after the spacing between the capacitor plates in the high-frequency welding equipment is adjusted. S02. Based on the adjustment information of the high-frequency welding equipment in N different historical time periods, obtain the first current value set I and the first current target value set T; Among them, I = [I1, I2,... I i ...、I N ; T = [T1, T2,... T i ...、T N ; T i The target current value is the value corresponding to the instruction to set the target current value received by the high-frequency welding equipment in the i-th historical time period among N different historical time periods. I i To ensure that the high-frequency welding equipment receives a target current value T in the i-th historical time period out of N different historical time periods. i The current value generated by the high-frequency welding equipment after the instruction; S03. Based on the set of capacitor plate spacing adjustment amounts corresponding to the process of adjusting the current value generated by each high-frequency welding equipment to the current target value set in the historical time period, obtain the average capacitor plate spacing adjustment amount set. Among them, the set of capacitor plate spacing adjustment amounts corresponding to the process of adjusting the current value generated by the high-frequency welding equipment in each historical time period to the current target value set in that historical time period is the first capacitor plate spacing adjustment amount set or the second capacitor plate spacing adjustment amount set. The first set of capacitor plate spacing adjustment amounts is the amount of current target value T during this historical time period. i The current value I generated by the high-frequency welding equipment is greater than that of the high-frequency welding equipment. i When the current generated by the high-frequency welding equipment is A, the corresponding adjustment amount of the capacitor plate spacing; Where, A=[I i + , I i +2 ,...I i +a ...I i +n ]; ； Among them, I i +a I represents the current value generated by the high-frequency welding equipment. i Add a The current value after that; n is a preset value, where n is greater than or equal to 100; The set of first capacitor plate spacing adjustment amounts corresponding to the process of adjusting the current value generated by the high-frequency welding equipment during the operation of the high-frequency welding equipment to the current target value set in the historical period is as follows: C z =[c z1 、c z2 、...c za ...c zn ]; C z Let z be the set of adjustment amounts of the first capacitor plate spacing of the high-frequency welding equipment in the z-th historical time period; z∈[1,2,....,N]; Among them, c za The current value I generated by the high-frequency welding equipment in the z-th historical time period is... i Adjusted to I i +a The corresponding adjustment amount of capacitor plate spacing; The second set of capacitor plate spacing adjustment amounts is the amount of current target value T during this historical time period. i The current value I generated by the high-frequency welding equipment is less than that of the high-frequency welding equipment. i When the current value generated by the high-frequency welding equipment is B, the corresponding adjustment amount of the capacitor plate spacing is: Among them, B=[I i - , I i -2 ,...I i -a ...I i -n ]; in, ; Among them, I i -a I represents the current value generated by the high-frequency welding equipment. i Reduce a The current value after that; The set of second capacitor plate spacing adjustment amounts corresponding to the current value generated by the high-frequency welding equipment during this historical period being adjusted to the target current value set for the high-frequency welding equipment during this historical period is as follows: D z =[d z1 、d z2 、...d za ...d zn ]; D z This is the set of adjustment amounts for the second capacitor plate spacing of the high-frequency welding equipment during the z-th historical time period. Where, d za The current value I generated by the high-frequency welding equipment i Adjusted to I i -a The corresponding adjustment amount of capacitor plate spacing.

2. The current control method for high-frequency welding equipment according to claim 1, characterized in that, The set of average capacitor plate spacing adjustment amounts includes: Based on the set of first capacitor plate spacing adjustment amounts corresponding to different historical time periods, the current values ​​I generated by the high-frequency welding equipment in different historical time periods that meet the first preset conditions are obtained. i After adjusting the capacitor plate spacing, I was achieved. i +a During the process, the average value of the corresponding capacitor plate spacing adjustment; and, Based on the set of second capacitor plate spacing adjustment amounts corresponding to different historical time periods, the current values ​​I generated by the high-frequency welding equipment in different historical time periods that meet the first preset conditions are obtained. i After adjusting the capacitor plate spacing to achieve I i -a During the process, the average value of the corresponding capacitor plate spacing adjustment; The first preset condition is that the high-frequency welding equipment receives the same set current target value and the current value generated by the high-frequency welding equipment is also the same after the high-frequency welding equipment receives the set current target value.

3. The current control method for high-frequency welding equipment according to claim 2, characterized in that, S2 specifically includes: If the current value generated by the high-frequency welding equipment after receiving the instruction to set the target current value is less than the target current value corresponding to the instruction, then the current value generated by the high-frequency welding equipment is rounded to the integer to obtain the IB value. The average value of the final capacitor plate spacing adjustment amount in the set of average capacitor plate spacing adjustment amounts is determined based on the IB value and the target current value corresponding to the high-frequency welding equipment. The average value of the final capacitor plate spacing adjustment is the current value I generated by the high-frequency welding equipment that meets the first preset condition in different historical time periods. i When the current generated by the high-frequency welding equipment is equal to the IB value, the current value is adjusted to I after adjusting the capacitor plate spacing. i +x The process, corresponding to the average value of the capacitor plate spacing adjustment; Where the value of x satisfies the first numerical condition; The first numerical condition is: the absolute value of the target current of the high-frequency welding equipment minus W is less than... Where W=I i +x ; Among them, the current value I generated by the high-frequency welding equipment that meets the first preset condition during the historical period. i The corresponding current target value is greater than or equal to the current target value corresponding to the instruction of the set current target value received by the high-frequency welding equipment; The average value of the final capacitor plate spacing adjustment amount by the motor in the high-frequency welding equipment is used to obtain the current value generated by the high-frequency welding equipment after the capacitor plate spacing is reduced.

4. The current control method for high-frequency welding equipment according to claim 3, characterized in that, S2 specifically includes: If the current value generated by the high-frequency welding equipment after receiving the instruction to set the target current value is greater than the target current value corresponding to the instruction, then the integer value of the current value generated by the high-frequency welding equipment during its current operation is used to obtain the IF value. The average value of the final capacitor plate spacing adjustment amount in the set of average capacitor plate spacing adjustment amounts is determined based on the IF value and the preset current target value. The final capacitor plate spacing adjustment is the current value I generated by the high-frequency welding equipment that meets the first preset condition during different historical time periods. i When the value is equal to IF, the capacitor plate spacing is adjusted to reach I. i -y At that time, the average value of the corresponding capacitor plate spacing adjustment; Among them, the current value I generated by the high-frequency welding equipment that meets the first preset condition during the historical period. i The corresponding current target value is less than or equal to the current target value corresponding to the instruction of the set current target value received by the high-frequency welding equipment; The value of y satisfies the second numerical condition; The second numerical condition is that the absolute value of the target current value of the high-frequency welding equipment minus Q is less than... Where Q=I i -y ; By using the average value of the final capacitor plate spacing adjustment amount by the motor in the high-frequency welding equipment to increase the capacitor plate spacing, the current value corresponding to the instruction of the set current target value received by the high-frequency welding equipment after the capacitor plate spacing is increased is obtained.

5. The current control method for high-frequency welding equipment according to claim 4, characterized in that, S3 specifically includes: If the comparison result shows that the current value generated by the high-frequency welding equipment corresponding to the adjusted capacitor plate spacing is greater than the target current value, then the capacitor plate spacing is corrected according to formula (1) in the pre-set second adjustment strategy to obtain the corrected capacitor plate spacing I. Ae ; The formula (1) is: I Ae =I A(e-1) +Fe; Fe is the preset adjustment amount when the current value generated by the high-frequency welding equipment corresponding to the capacitor plate spacing after the capacitor plate spacing is adjusted by the first strategy does not decrease to the preset current target value. The preset adjustment amount is the preset adjustment amount when the capacitor plate spacing is corrected by formula (1) in the preset second adjustment strategy for the eth time. I A(e-1) The capacitor plate spacing is obtained after correcting the capacitor plate spacing using formula (1) in the pre-set second adjustment strategy for the (e-1)th time; where e is greater than or equal to 1.

6. The current control method for high-frequency welding equipment according to claim 5, characterized in that, If the comparison result shows that the current value generated by the high-frequency welding equipment corresponding to the capacitor plate spacing after the adjustment of the first adjustment strategy is less than the preset current target value, then the difference between the current value generated by the high-frequency welding equipment corresponding to the capacitor plate spacing after the adjustment of the first adjustment strategy and the preset current target value is obtained. The difference is compared with a preset threshold N0 to obtain a numerical comparison result; and based on the numerical comparison result, the adjustment amount of the capacitor plate spacing is set.

7. The current control method for high-frequency welding equipment according to claim 6, characterized in that, Based on the numerical comparison results, the adjustment amount for the capacitor plate spacing is set, specifically including: If the difference is less than the preset threshold N0, then the current capacitor plate spacing is reduced by one millimeter. If the difference is greater than the preset threshold N0, then the current capacitor plate spacing is reduced by a preset unit distance; The pre-specified unit distance is the absolute value of the difference between the difference and the pre-set threshold N0.

8. The current control method for high-frequency welding equipment according to claim 4, characterized in that, N is greater than or equal to 100.

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