Voltage adjusting method and system for alternating-current pulse welding machine

Abstract

The invention discloses a voltage adjusting method and system for an alternating-current pulse welding machine. The method comprises the steps that the unified voltage and the set welding voltage of the welding machine are obtained; a voltage deviation value V is obtained through calculation according to the unified voltage and the set welding voltage; and the pulse peak value IP, the pulse base value IB, the pulse period T, the alternating current duration TEN and the alternating current IEN of the welding current are adjusted according to the voltage deviation value V, the positive and negative proportions of alternating current pulses are not changed, the overall welding heat input is kept unchanged, and the ideal welding state is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to a voltage regulation method and system for an AC pulse welding machine. Background Art

[0002] In pulse MIG / MAG welding, AC pulse has lower welding heat input than ordinary DC reverse pulse, which is particularly suitable for thin plate welding or cladding welding of some special materials. In the conventional AC pulse welding process, the voltage adjustment method is the same as the ordinary DC reverse adjustment method, which is to adjust the pulse cycle, peak base current and peak time to achieve the purpose of increasing or decreasing the voltage. However, this adjustment method has certain defects. Simply changing the positive part of the pulse parameters will not only change the positive and negative ratio of the AC pulse, but also affect the overall welding heat. Summary of the invention

[0003] The object of the present invention is to provide a voltage regulation method and system for an AC pulse welding machine, which will not change the positive and negative ratios of the AC pulses, keep the overall welding heat input unchanged, and achieve an ideal welding state.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a voltage regulation method for an AC pulse welding machine, comprising: Obtain the unified voltage and set welding voltage of the welding machine; calculate and obtain the voltage deviation △V according to the unified voltage and the set welding voltage; According to the voltage deviation △V, the pulse peak IP, pulse base value IB, pulse period T and AC current duration T of the welding current are EN and the AC current I EN Make adjustments.

[0005] Further, the pulse peak value IP, pulse base value IB and pulse period T of the welding current are adjusted according to the voltage deviation △V, and the process includes: IP t = (1+△V * K1) * IP t-1 , t≥1; IB t = (1+△V * K2) * IB t-1 , t≥1; T t = (1+△V * K3) * T t-1 , t≥1; In the formula, IP t Indicates the peak current in the current discharge cycle; IP t-1 Indicates the peak current or initial peak current of the previous discharge cycle; IBt Indicates the pulse base value in the current discharge cycle; IB t-1 Indicates the pulse base value or initial pulse base value of the previous discharge cycle; T t Indicates the current pulse period; T t-1 represents the previous pulse cycle or the initial pulse cycle; t represents time; K1, K2 and K3 represent set weights.

[0006] Furthermore, according to the voltage deviation △V, the AC current duration T of the welding current EN and the AC current I EN Make adjustments, the process includes: T EN,t = (1+△V * K4) * T EN, t-1 ; I EN,t = (1+△V * K5) * I EN1, t-1 ; In the formula, T EN,t Indicates the duration of the AC current in the current discharge cycle; T EN, t-1 Indicates the duration of the AC current in the previous discharge cycle or the duration of the initial AC current; I EN,t Indicates the AC current value in the current discharge cycle; I EN1, t-1 Indicates the AC current value of the previous discharge cycle or the initial AC current value; K4 and K5 indicate the set weights.

[0007] Furthermore, it also includes: calculating K4 weight and K4 weight according to weight K1, weight K2 and weight K3, and the expression formula is: K4 = m(K1+K2), K5 = nK3; In the formula, m and n are greater than 0, and m and n are set coefficients.

[0008] Furthermore, when △V is positive, set K1, K2, and K5 to positive numbers, and K3 and K4 to negative numbers; When △V is a negative value, set K1, K2, and K5 to negative numbers, and K3 and K4 to positive numbers.

[0009] Furthermore, during the operation of the welding machine, the unified voltage of the welding machine is re-read at every set detection period, and the voltage deviation ΔV is calculated based on the unified voltage and the set welding voltage.

[0010] In a second aspect, the present invention provides an AC pulse welding machine voltage regulation system, which is used to execute the AC pulse welding machine voltage regulation method described in the first aspect, and the AC pulse welding machine voltage regulation system includes an acquisition unit and an adjustment unit; the acquisition unit and the adjustment unit are electrically connected to the welding machine; An acquisition unit is used to acquire the unified voltage and the set welding voltage of the welding machine; and calculate the voltage deviation △V according to the unified voltage and the set welding voltage; The adjustment unit adjusts the pulse peak IP, pulse base IB, pulse period T and AC current duration T of the welding current according to the voltage deviation △V. EN and the AC current I EN Make adjustments.

[0011] Furthermore, the adjustment unit adjusts the pulse peak IP, pulse base IB, pulse period T and AC current duration T of the welding current according to the voltage deviation ΔV. EN and the AC current I EN Make adjustments, the process includes: IP t = (1+△V * K1) * IP t-1 , t≥1; IB t = (1+△V * K2) * IB t-1 , t≥1; T t = (1+△V * K3) * T t-1 , t≥1; T EN,t = (1+△V * K4) * T EN, t-1 ; I EN,t = (1+△V * K5) * I EN1, t-1 ; In the formula, IP t Indicates the peak current in the current discharge cycle; IP t-1 Indicates the peak current or initial peak current of the previous discharge cycle; IB t Indicates the pulse base value in the current discharge cycle; IB t-1 Indicates the pulse base value or initial pulse base value of the previous discharge cycle; T t Indicates the current pulse period; T t-1 represents the last pulse cycle or the initial pulse cycle; t represents time; K1, K2 and K3 represent the set weights; T EN,t Indicates the duration of the AC current in the current discharge cycle; T EN, t-1 Indicates the duration of the AC current in the previous discharge cycle or the duration of the initial AC current; I EN,t Indicates the AC current value in the current discharge cycle; I EN1, t-1 Indicates the AC current value of the previous discharge cycle or the initial AC current value; K4 and K5 indicate the set weights.

[0012] Further, the adjustment unit calculates K4 weight and K4 weight according to weight K1, weight K2 and weight K3, and the expression formula is: K4 = m(K1+K2), K5 = nK3; In the formula, m and n are greater than 0, and m and n are set coefficients.

[0013] In a third aspect, the present invention provides an electronic device, comprising a storage medium and a processor; the storage medium is used to store instructions; and the processor is used to operate according to the instructions to execute the AC pulse welding machine voltage regulation method described in the first aspect.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The invention obtains the unified voltage and the set welding voltage of the welding machine; calculates the voltage deviation △V according to the unified voltage and the set welding voltage; and calculates the pulse peak IP, pulse base IB, pulse period T and AC current duration T of the welding current according to the voltage deviation △V. EN and the AC current I EN Adjustment will not change the positive and negative ratio of the AC pulse, keeping the overall welding heat input unchanged and achieving the ideal welding state. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a voltage waveform diagram of the alternating current for the welding machine provided in the present embodiment 1; Figure 2 is a current waveform diagram of the alternating current for the welding machine provided in the present embodiment 1; Figure 3 This is a flow chart of the voltage regulation method for an AC pulse welding machine provided in this embodiment 1. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0017] It should be noted that in the description of the present invention, the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "up", "down", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. The terms "front", "rear", "left", "right", "up", and "down" used in the description of the present invention refer to the directions in the accompanying drawings, and the terms "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0018] Example 1 like Figure 3 As shown, a voltage regulation method for an AC pulse welding machine includes: Obtain the unified voltage and set welding voltage of the welding machine; calculate and obtain the voltage deviation △V according to the unified voltage and the set welding voltage; like Figure 1 to Figure 2 As shown, the pulse peak value IP, pulse base value IB and pulse period T of the welding current are adjusted according to the voltage deviation △V, and the process includes: IP t = (1+△V * K1) * IP t-1 , t≥1; IB t = (1+△V * K2) * IB t-1 , t≥1; T t = (1+△V * K3) * T t-1 , t≥1; In the formula, IP t Indicates the peak current in the current discharge cycle; IP t-1 Indicates the peak current or initial peak current of the previous discharge cycle; IB t Indicates the pulse base value in the current discharge cycle; IB t-1 Indicates the pulse base value or initial pulse base value of the previous discharge cycle; T t Indicates the current pulse period; T t-1 represents the previous pulse cycle or the initial pulse cycle; t represents time; K1, K2 and K3 represent set weights.

[0019] K4 weight and K4 weight are calculated according to weight K1, weight K2 and weight K3, and the expression formula is: K4 = m(K1+K2), K5 = nK3; in the formula, m and n are greater than 0, and m and n are set coefficients.

[0020] According to the voltage deviation △V, the AC current duration T of the welding current EN and the AC current I EN Make adjustments, the process includes: T EN,t = (1+△V * K4) * T EN, t-1 ; I EN,t = (1+△V * K5) * I EN1, t-1 ; In the formula, T EN,t Indicates the duration of the AC current in the current discharge cycle; T EN, t-1 Indicates the duration of the AC current in the previous discharge cycle or the duration of the initial AC current; IEN,t Indicates the AC current value in the current discharge cycle; I EN1, t-1 Indicates the AC current value of the previous discharge cycle or the initial AC current value; K4 and K5 indicate the set weights.

[0021] When △V is a positive value, K1, K2, and K5 are set to positive numbers, and K3 and K4 are set to negative numbers; when △V is a negative value, K1, K2, and K5 are set to negative numbers, and K3 and K4 are set to positive numbers. During the operation of the welding machine, the unified voltage of the welding machine is re-read at each set detection cycle, and the voltage deviation △V is calculated based on the unified voltage and the set welding voltage.

[0022] Example 2 This embodiment provides an AC pulse welding machine voltage regulation system, which is used to perform the AC pulse welding machine voltage regulation method described in Example 1. The AC pulse welding machine voltage regulation system includes an acquisition unit and an adjustment unit; the acquisition unit and the adjustment unit are electrically connected to the welding machine; An acquisition unit is used to acquire the unified voltage and the set welding voltage of the welding machine; and calculate the voltage deviation △V according to the unified voltage and the set welding voltage; The adjustment unit adjusts the pulse peak IP, pulse base IB, pulse period T and AC current duration T of the welding current according to the voltage deviation △V. EN and the AC current I EN Make adjustments.

[0023] The adjustment unit adjusts the pulse peak IP, pulse base IB, pulse period T and AC current duration T of the welding current according to the voltage deviation △V. EN and the AC current I EN Make adjustments, the process includes: IP t = (1+△V * K1) * IP t-1 , t≥1; IB t = (1+△V * K2) * IB t-1 , t≥1; T t = (1+△V * K3) * T t-1 , t≥1; T EN,t = (1+△V * K4) * T EN, t-1 ; I EN,t = (1+△V * K5) * I EN1, t-1 ; In the formula, IP tIndicates the peak current in the current discharge cycle; IP t-1 Indicates the peak current or initial peak current of the previous discharge cycle; IB t Indicates the pulse base value in the current discharge cycle; IB t-1 Indicates the pulse base value or initial pulse base value of the previous discharge cycle; T t Indicates the current pulse period; T t-1 represents the last pulse cycle or the initial pulse cycle; t represents time; K1, K2 and K3 represent the set weights; T EN,t Indicates the duration of the AC current in the current discharge cycle; T EN, t-1 Indicates the duration of the AC current in the previous discharge cycle or the duration of the initial AC current; I EN,t Indicates the AC current value in the current discharge cycle; I EN1, t-1 Indicates the AC current value of the previous discharge cycle or the initial AC current value; K4 and K5 indicate the set weights.

[0024] The adjustment unit calculates K4 weight and K4 weight according to weight K1, weight K2 and weight K3, and the expression formula is: K4= m(K1+K2), K5 = nK3; in the formula, m and n are greater than 0, and m and n are set coefficients.

[0025] Example 3 This embodiment provides an electronic device, including a storage medium and a processor; the storage medium is used to store instructions; it is characterized in that the processor is used to operate according to the instructions to execute the AC pulse welding machine voltage regulation method described in Example 1.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A voltage regulation method for an AC pulse welding machine, characterized in that: include: Obtain the unified voltage and set welding voltage of the welding machine; calculate and obtain the voltage deviation △V according to the unified voltage and the set welding voltage; According to the voltage deviation △V, the pulse peak IP, pulse base value IB, pulse period T and AC current duration T of the welding current are EN and the AC current I EN Make adjustments.

2. The voltage regulation method for an AC pulse welding machine according to claim 1, characterized in that: According to the voltage deviation △V, the pulse peak value IP, pulse base value IB and pulse period T of the welding current are adjusted. The process includes: IP t = (1+△V * K1) * IP t-1 ,t≥1; ONE t = (1+△V * K2) * IB t-1 ,t≥1; T t = (1+△V * K3) * T t-1 ,t≥1; In the formula, IP t Indicates the peak current in the current discharge cycle; IP t-1 Indicates the peak current or initial peak current of the previous discharge cycle; IB t Indicates the pulse base value in the current discharge cycle; IB t-1 Indicates the pulse base value or initial pulse base value of the previous discharge cycle; T t Indicates the current pulse period; T t-1 represents the previous pulse cycle or the initial pulse cycle; t represents time; K1, K2 and K3 represent set weights.

3. The voltage regulation method for an AC pulse welding machine according to claim 2, characterized in that: According to the voltage deviation △V, the AC current duration T of the welding current EN and the AC current I EN Make adjustments, the process includes: T EN,t = (1+△V * K4) * T EN, t-1 ; I EN,t = (1+△V * K5) * I EN1, t-1 ; In the formula, T EN,t Indicates the duration of the AC current in the current discharge cycle; T EN, t-1 Indicates the duration of the AC current in the previous discharge cycle or the duration of the initial AC current; I EN,t Indicates the AC current value in the current discharge cycle; I EN1, t-1 Indicates the AC current value of the previous discharge cycle or the initial AC current value; K4 and K5 indicate the set weights.

4. The voltage regulation method for an AC pulse welding machine according to claim 3, characterized in that: Also includes: Calculate K4 weight and K4 weight according to weight K1, weight K2 and weight K3. The expression formula is: K4 = m(K1+K2), K5 = nK3; In the formula, m and n are greater than 0, and m and n are set coefficients.

5. The voltage regulation method for an AC pulse welding machine according to claim 3, characterized in that: When △V is positive, set K1, K2, and K5 to positive numbers, and K3 and K4 to negative numbers; When △V is a negative value, set K1, K2, and K5 to negative numbers, and K3 and K4 to positive numbers.

6. The voltage regulation method for an AC pulse welding machine according to claim 1, characterized in that: During the operation of the welding machine, the unified voltage of the welding machine is re-read at every set detection period, and the voltage deviation ΔV is calculated based on the unified voltage and the set welding voltage.

7. An AC pulse welding machine voltage regulation system, characterized in that: It includes an acquisition unit and an adjustment unit; the acquisition unit and the adjustment unit are electrically connected to the welding machine; An acquisition unit is used to acquire the unified voltage and the set welding voltage of the welding machine; and calculate the voltage deviation △V according to the unified voltage and the set welding voltage; The adjustment unit adjusts the pulse peak IP, pulse base IB, pulse period T and AC current duration T of the welding current according to the voltage deviation △V. EN and the AC current I EN Make adjustments.

8. The voltage regulation system for an AC pulse welding machine according to claim 7, characterized in that: The adjustment unit adjusts the pulse peak IP, pulse base IB, pulse period T and AC current duration T of the welding current according to the voltage deviation △V. EN and the AC current I EN Make adjustments, the process includes: IP t = (1+△V * K1) * IP t-1 ,t≥1; ONE t = (1+△V * K2) * IB t-1 ,t≥1; T t = (1+△V * K3) * T t-1 ,t≥1; T EN,t = (1+△V * K4) * T EN, t-1 ; I EN,t = (1+△V * K5) * I EN1, t-1 ; In the formula, IP t Indicates the peak current in the current discharge cycle; IP t-1 Indicates the peak current or initial peak current of the previous discharge cycle; IB t Indicates the pulse base value in the current discharge cycle; IB t-1 Indicates the pulse base value or initial pulse base value of the previous discharge cycle; T t Indicates the current pulse period; T t-1 represents the last pulse cycle or the initial pulse cycle; t represents time; K1, K2 and K3 represent the set weights; T EN,t Indicates the duration of the AC current in the current discharge cycle; T EN, t-1 Indicates the duration of the AC current in the previous discharge cycle or the duration of the initial AC current; I EN,t Indicates the AC current value in the current discharge cycle; I EN1, t-1 Indicates the AC current value of the previous discharge cycle or the initial AC current value; K4 and K5 indicate the set weights.

9. The voltage regulation system for an AC pulse welding machine according to claim 7, characterized in that: The adjustment unit calculates K4 weight and K4 weight according to weight K1, weight K2 and weight K3, and the expression formula is: K4 = m(K1+K2), K5 = nK3; In the formula, m and n are greater than 0, and m and n are set coefficients.

10. An electronic device comprising a storage medium and a processor; the storage medium is used to store instructions; characterized in that: The processor is used to operate according to the instructions to execute the AC pulse welding machine voltage regulation method as described in any one of claims 1 to 6.

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